rust/cargo-c: update to 0.10.9+cargo-0.85.0

[oi-userland.git] / components / library / openssl / openssl-0.9.8 / engines / pkcs11 / hw_pk11.c

/*
 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#pragma ident   "@(#)hw_pk11.c  1.6     10/09/23 SMI"

/* crypto/engine/hw_pk11.c */
/*
 * This product includes software developed by the OpenSSL Project for
 * use in the OpenSSL Toolkit (http://www.openssl.org/).
 *
 * This project also referenced hw_pkcs11-0.9.7b.patch written by
 * Afchine Madjlessi.
 */
/*
 * ====================================================================
 * Copyright (c) 2000-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <strings.h>

#include <openssl/e_os2.h>
#include <openssl/crypto.h>
#include <openssl/engine.h>
#include <openssl/dso.h>
#include <openssl/err.h>
#include <openssl/bn.h>
#include <openssl/md5.h>
#include <openssl/pem.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/aes.h>
#include <cryptlib.h>
#include <dlfcn.h>
#include <pthread.h>

#ifndef OPENSSL_NO_HW
#ifndef OPENSSL_NO_HW_PK11

/* label for debug messages printed on stderr */
#define PK11_DBG        "PKCS#11 ENGINE DEBUG"
/* prints a lot of debug messages on stderr about slot selection process */
#undef  DEBUG_SLOT_SELECTION
/*
 * Solaris specific code. See comment at check_hw_mechanisms() for more
 * information.
 */
#if defined(__SVR4) && defined(__sun)
#define SOLARIS_HW_SLOT_SELECTION
#endif

/*
 * AES counter mode is not supported in the OpenSSL EVP API yet and neither
 * there are official OIDs for mechanisms based on this mode. With our changes,
 * an application can define its own EVP calls for AES counter mode and then
 * it can make use of hardware acceleration through this engine. However, it's
 * better if we keep AES CTR support code under ifdef's.
 */
#define SOLARIS_AES_CTR

#include <security/cryptoki.h>
#include <security/pkcs11.h>
#include "hw_pk11.h"
#include "hw_pk11_uri.h"

#define PK11_ENGINE_LIB_NAME "PKCS#11 engine"
#include "hw_pk11_err.c"

#ifdef  SOLARIS_AES_CTR
/*
 * NIDs for AES counter mode that will be defined during the engine
 * initialization.
 */
int NID_aes_128_ctr = NID_undef;
int NID_aes_192_ctr = NID_undef;
int NID_aes_256_ctr = NID_undef;
#endif  /* SOLARIS_AES_CTR */

/*
 * We use this lock to prevent multiple C_Login()s, guard getpassphrase(),
 * uri_struct manipulation, and static token info. All of that is used by the
 * RSA keys by reference feature.
 */
pthread_mutex_t *uri_lock;

#ifdef  SOLARIS_HW_SLOT_SELECTION
/*
 * Tables for symmetric ciphers and digest mechs found in the pkcs11_kernel
 * library. See comment at check_hw_mechanisms() for more information.
 */
int *hw_cnids;
int *hw_dnids;
#endif  /* SOLARIS_HW_SLOT_SELECTION */

/* PKCS#11 session caches and their locks for all operation types */
static PK11_CACHE session_cache[OP_MAX];

/*
 * We cache the flags so that we do not have to run C_GetTokenInfo() again when
 * logging into the token.
 */
CK_FLAGS pubkey_token_flags;

/*
 * As stated in v2.20, 11.7 Object Management Function, in section for
 * C_FindObjectsInit(), at most one search operation may be active at a given
 * time in a given session. Therefore, C_Find{,Init,Final}Objects() should be
 * grouped together to form one atomic search operation. This is already
 * ensured by the property of unique PKCS#11 session handle used for each
 * PK11_SESSION object.
 *
 * This is however not the biggest concern - maintaining consistency of the
 * underlying object store is more important. The same section of the spec also
 * says that one thread can be in the middle of a search operation while another
 * thread destroys the object matching the search template which would result in
 * invalid handle returned from the search operation.
 *
 * Hence, the following locks are used for both protection of the object stores.
 * They are also used for active list protection.
 */
pthread_mutex_t *find_lock[OP_MAX] = { NULL };

/*
 * lists of asymmetric key handles which are active (referenced by at least one
 * PK11_SESSION structure, either held by a thread or present in free_session
 * list) for given algorithm type
 */
PK11_active *active_list[OP_MAX] = { NULL };

/*
 * Create all secret key objects in a global session so that they are available
 * to use for other sessions. These other sessions may be opened or closed
 * without losing the secret key objects.
 */
static CK_SESSION_HANDLE        global_session = CK_INVALID_HANDLE;

/* ENGINE level stuff */
static int pk11_init(ENGINE *e);
static int pk11_library_init(ENGINE *e);
static int pk11_finish(ENGINE *e);
static int pk11_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
static int pk11_destroy(ENGINE *e);

/* RAND stuff */
static void pk11_rand_seed(const void *buf, int num);
static void pk11_rand_add(const void *buf, int num, double add_entropy);
static void pk11_rand_cleanup(void);
static int pk11_rand_bytes(unsigned char *buf, int num);
static int pk11_rand_status(void);

/* These functions are also used in other files */
PK11_SESSION *pk11_get_session(PK11_OPTYPE optype);
void pk11_return_session(PK11_SESSION *sp, PK11_OPTYPE optype);

/* active list manipulation functions used in this file */
extern int pk11_active_delete(CK_OBJECT_HANDLE h, PK11_OPTYPE type);
extern void pk11_free_active_list(PK11_OPTYPE type);

#ifndef OPENSSL_NO_RSA
int pk11_destroy_rsa_key_objects(PK11_SESSION *session);
int pk11_destroy_rsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock);
int pk11_destroy_rsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock);
#endif
#ifndef OPENSSL_NO_DSA
int pk11_destroy_dsa_key_objects(PK11_SESSION *session);
int pk11_destroy_dsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock);
int pk11_destroy_dsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock);
#endif
#ifndef OPENSSL_NO_DH
int pk11_destroy_dh_key_objects(PK11_SESSION *session);
int pk11_destroy_dh_object(PK11_SESSION *session, CK_BBOOL uselock);
#endif

/* Local helper functions */
static int pk11_free_all_sessions(void);
static int pk11_free_session_list(PK11_OPTYPE optype);
static int pk11_setup_session(PK11_SESSION *sp, PK11_OPTYPE optype);
static int pk11_destroy_cipher_key_objects(PK11_SESSION *session);
static int pk11_destroy_object(CK_SESSION_HANDLE handle, CK_OBJECT_HANDLE oh,
    CK_BBOOL persistent);
static const char *get_PK11_LIBNAME(void);
static void free_PK11_LIBNAME(void);
static long set_PK11_LIBNAME(const char *name);

/* Symmetric cipher and digest support functions */
static int cipher_nid_to_pk11(int nid);
#ifdef  SOLARIS_AES_CTR
static int pk11_add_NID(char *sn, char *ln);
static int pk11_add_aes_ctr_NIDs(void);
#endif  /* SOLARIS_AES_CTR */
static int pk11_usable_ciphers(const int **nids);
static int pk11_usable_digests(const int **nids);
static int pk11_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
        const unsigned char *iv, int enc);
static int pk11_cipher_final(PK11_SESSION *sp);
static int pk11_cipher_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
        const unsigned char *in, unsigned int inl);
static int pk11_cipher_cleanup(EVP_CIPHER_CTX *ctx);
static int pk11_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
        const int **nids, int nid);
static int pk11_engine_digests(ENGINE *e, const EVP_MD **digest,
        const int **nids, int nid);
static CK_OBJECT_HANDLE pk11_get_cipher_key(EVP_CIPHER_CTX *ctx,
        const unsigned char *key, CK_KEY_TYPE key_type, PK11_SESSION *sp);
static int check_new_cipher_key(PK11_SESSION *sp, const unsigned char *key,
        int key_len);
static int md_nid_to_pk11(int nid);
static int pk11_digest_init(EVP_MD_CTX *ctx);
static int pk11_digest_update(EVP_MD_CTX *ctx, const void *data,
        size_t count);
static int pk11_digest_final(EVP_MD_CTX *ctx, unsigned char *md);
static int pk11_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
static int pk11_digest_cleanup(EVP_MD_CTX *ctx);

static int pk11_choose_slots(int *any_slot_found);
static void pk11_find_symmetric_ciphers(CK_FUNCTION_LIST_PTR pflist,
    CK_SLOT_ID current_slot, int *current_slot_n_cipher,
    int *local_cipher_nids);
static void pk11_find_digests(CK_FUNCTION_LIST_PTR pflist,
    CK_SLOT_ID current_slot, int *current_slot_n_digest,
    int *local_digest_nids);
static void pk11_get_symmetric_cipher(CK_FUNCTION_LIST_PTR, int slot_id,
    CK_MECHANISM_TYPE mech, int *current_slot_n_cipher, int *local_cipher_nids,
    int id);
static void pk11_get_digest(CK_FUNCTION_LIST_PTR pflist, int slot_id,
    CK_MECHANISM_TYPE mech, int *current_slot_n_digest, int *local_digest_nids,
    int id);

static int pk11_init_all_locks(void);
static void pk11_free_all_locks(void);

#ifdef  SOLARIS_HW_SLOT_SELECTION
static int check_hw_mechanisms(void);
static int nid_in_table(int nid, int *nid_table);
#endif  /* SOLARIS_HW_SLOT_SELECTION */

/* Index for the supported ciphers */
enum pk11_cipher_id {
        PK11_DES_CBC,
        PK11_DES3_CBC,
        PK11_DES_ECB,
        PK11_DES3_ECB,
        PK11_RC4,
        PK11_AES_128_CBC,
        PK11_AES_192_CBC,
        PK11_AES_256_CBC,
        PK11_AES_128_ECB,
        PK11_AES_192_ECB,
        PK11_AES_256_ECB,
        PK11_BLOWFISH_CBC,
#ifdef  SOLARIS_AES_CTR
        PK11_AES_128_CTR,
        PK11_AES_192_CTR,
        PK11_AES_256_CTR,
#endif  /* SOLARIS_AES_CTR */
        PK11_CIPHER_MAX
};

/* Index for the supported digests */
enum pk11_digest_id {
        PK11_MD5,
        PK11_SHA1,
        PK11_SHA224,
        PK11_SHA256,
        PK11_SHA384,
        PK11_SHA512,
        PK11_DIGEST_MAX
};

#define TRY_OBJ_DESTROY(sp, obj_hdl, retval, uselock, alg_type) \
        {                                                               \
        if (uselock)                                                    \
                LOCK_OBJSTORE(alg_type);                                \
        if (pk11_active_delete(obj_hdl, alg_type) == 1)                 \
                {                                                       \
                retval = pk11_destroy_object(sp->session, obj_hdl,      \
                    sp->persistent);                                    \
                }                                                       \
        if (uselock)                                                    \
                UNLOCK_OBJSTORE(alg_type);                              \
        }

static int cipher_nids[PK11_CIPHER_MAX];
static int digest_nids[PK11_DIGEST_MAX];
static int cipher_count         = 0;
static int digest_count         = 0;
static CK_BBOOL pk11_have_rsa   = CK_FALSE;
static CK_BBOOL pk11_have_dsa   = CK_FALSE;
static CK_BBOOL pk11_have_dh    = CK_FALSE;
static CK_BBOOL pk11_have_random = CK_FALSE;

typedef struct PK11_CIPHER_st
        {
        enum pk11_cipher_id     id;
        int                     nid;
        int                     iv_len;
        int                     min_key_len;
        int                     max_key_len;
        CK_KEY_TYPE             key_type;
        CK_MECHANISM_TYPE       mech_type;
        } PK11_CIPHER;

static PK11_CIPHER ciphers[] =
        {
        { PK11_DES_CBC,         NID_des_cbc,            8,       8,   8,
                CKK_DES,        CKM_DES_CBC, },
        { PK11_DES3_CBC,        NID_des_ede3_cbc,       8,      24,  24,
                CKK_DES3,       CKM_DES3_CBC, },
        { PK11_DES_ECB,         NID_des_ecb,            0,       8,   8,
                CKK_DES,        CKM_DES_ECB, },
        { PK11_DES3_ECB,        NID_des_ede3_ecb,       0,      24,  24,
                CKK_DES3,       CKM_DES3_ECB, },
        { PK11_RC4,             NID_rc4,                0,      16, 256,
                CKK_RC4,        CKM_RC4, },
        { PK11_AES_128_CBC,     NID_aes_128_cbc,        16,     16,  16,
                CKK_AES,        CKM_AES_CBC, },
        { PK11_AES_192_CBC,     NID_aes_192_cbc,        16,     24,  24,
                CKK_AES,        CKM_AES_CBC, },
        { PK11_AES_256_CBC,     NID_aes_256_cbc,        16,     32,  32,
                CKK_AES,        CKM_AES_CBC, },
        { PK11_AES_128_ECB,     NID_aes_128_ecb,        0,      16,  16,
                CKK_AES,        CKM_AES_ECB, },
        { PK11_AES_192_ECB,     NID_aes_192_ecb,        0,      24,  24,
                CKK_AES,        CKM_AES_ECB, },
        { PK11_AES_256_ECB,     NID_aes_256_ecb,        0,      32,  32,
                CKK_AES,        CKM_AES_ECB, },
        { PK11_BLOWFISH_CBC,    NID_bf_cbc,             8,      16,  16,
                CKK_BLOWFISH,   CKM_BLOWFISH_CBC, },
#ifdef  SOLARIS_AES_CTR
        /* we don't know the correct NIDs until the engine is initialized */
        { PK11_AES_128_CTR,     NID_undef,              16,     16,  16,
                CKK_AES,        CKM_AES_CTR, },
        { PK11_AES_192_CTR,     NID_undef,              16,     24,  24,
                CKK_AES,        CKM_AES_CTR, },
        { PK11_AES_256_CTR,     NID_undef,              16,     32,  32,
                CKK_AES,        CKM_AES_CTR, },
#endif  /* SOLARIS_AES_CTR */
        };

typedef struct PK11_DIGEST_st
        {
        enum pk11_digest_id     id;
        int                     nid;
        CK_MECHANISM_TYPE       mech_type;
        } PK11_DIGEST;

static PK11_DIGEST digests[] =
        {
        {PK11_MD5,      NID_md5,        CKM_MD5, },
        {PK11_SHA1,     NID_sha1,       CKM_SHA_1, },
        {PK11_SHA224,   NID_sha224,     CKM_SHA224, },
        {PK11_SHA256,   NID_sha256,     CKM_SHA256, },
        {PK11_SHA384,   NID_sha384,     CKM_SHA384, },
        {PK11_SHA512,   NID_sha512,     CKM_SHA512, },
        {0,             NID_undef,      0xFFFF, },
        };

/*
 * Structure to be used for the cipher_data/md_data in
 * EVP_CIPHER_CTX/EVP_MD_CTX structures in order to use the same pk11
 * session in multiple cipher_update calls
 */
typedef struct PK11_CIPHER_STATE_st
        {
        PK11_SESSION    *sp;
        } PK11_CIPHER_STATE;


/*
 * libcrypto EVP stuff - this is how we get wired to EVP so the engine gets
 * called when libcrypto requests a cipher NID.
 *
 * Note how the PK11_CIPHER_STATE is used here.
 */

/* DES CBC EVP */
static const EVP_CIPHER pk11_des_cbc =
        {
        NID_des_cbc,
        8, 8, 8,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

/* 3DES CBC EVP */
static const EVP_CIPHER pk11_3des_cbc =
        {
        NID_des_ede3_cbc,
        8, 24, 8,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

/*
 * ECB modes don't use an Initial Vector so that's why set_asn1_parameters and
 * get_asn1_parameters fields are set to NULL.
 */
static const EVP_CIPHER pk11_des_ecb =
        {
        NID_des_ecb,
        8, 8, 8,
        EVP_CIPH_ECB_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };

static const EVP_CIPHER pk11_3des_ecb =
        {
        NID_des_ede3_ecb,
        8, 24, 8,
        EVP_CIPH_ECB_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };


static const EVP_CIPHER pk11_aes_128_cbc =
        {
        NID_aes_128_cbc,
        16, 16, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

static const EVP_CIPHER pk11_aes_192_cbc =
        {
        NID_aes_192_cbc,
        16, 24, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

static const EVP_CIPHER pk11_aes_256_cbc =
        {
        NID_aes_256_cbc,
        16, 32, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

/*
 * ECB modes don't use IV so that's why set_asn1_parameters and
 * get_asn1_parameters are set to NULL.
 */
static const EVP_CIPHER pk11_aes_128_ecb =
        {
        NID_aes_128_ecb,
        16, 16, 0,
        EVP_CIPH_ECB_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };

static const EVP_CIPHER pk11_aes_192_ecb =
        {
        NID_aes_192_ecb,
        16, 24, 0,
        EVP_CIPH_ECB_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };

static const EVP_CIPHER pk11_aes_256_ecb =
        {
        NID_aes_256_ecb,
        16, 32, 0,
        EVP_CIPH_ECB_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };

#ifdef  SOLARIS_AES_CTR
/*
 * NID_undef's will be changed to the AES counter mode NIDs as soon they are
 * created in pk11_library_init(). Note that the need to change these structures
 * is the reason why we don't define them with the const keyword.
 */
static EVP_CIPHER pk11_aes_128_ctr =
        {
        NID_undef,
        16, 16, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

static EVP_CIPHER pk11_aes_192_ctr =
        {
        NID_undef,
        16, 24, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

static EVP_CIPHER pk11_aes_256_ctr =
        {
        NID_undef,
        16, 32, 16,
        EVP_CIPH_CBC_MODE,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };
#endif  /* SOLARIS_AES_CTR */

static const EVP_CIPHER pk11_bf_cbc =
        {
        NID_bf_cbc,
        8, 16, 8,
        EVP_CIPH_VARIABLE_LENGTH,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
        NULL
        };

static const EVP_CIPHER pk11_rc4 =
        {
        NID_rc4,
        1, 16, 0,
        EVP_CIPH_VARIABLE_LENGTH,
        pk11_cipher_init,
        pk11_cipher_do_cipher,
        pk11_cipher_cleanup,
        sizeof (PK11_CIPHER_STATE),
        NULL,
        NULL,
        NULL
        };

static const EVP_MD pk11_md5 =
        {
        NID_md5,
        NID_md5WithRSAEncryption,
        MD5_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        MD5_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

static const EVP_MD pk11_sha1 =
        {
        NID_sha1,
        NID_sha1WithRSAEncryption,
        SHA_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        SHA_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

static const EVP_MD pk11_sha224 =
        {
        NID_sha224,
        NID_sha224WithRSAEncryption,
        SHA224_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        /* SHA-224 uses the same cblock size as SHA-256 */
        SHA256_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

static const EVP_MD pk11_sha256 =
        {
        NID_sha256,
        NID_sha256WithRSAEncryption,
        SHA256_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        SHA256_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

static const EVP_MD pk11_sha384 =
        {
        NID_sha384,
        NID_sha384WithRSAEncryption,
        SHA384_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        /* SHA-384 uses the same cblock size as SHA-512 */
        SHA512_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

static const EVP_MD pk11_sha512 =
        {
        NID_sha512,
        NID_sha512WithRSAEncryption,
        SHA512_DIGEST_LENGTH,
        0,
        pk11_digest_init,
        pk11_digest_update,
        pk11_digest_final,
        pk11_digest_copy,
        pk11_digest_cleanup,
        EVP_PKEY_RSA_method,
        SHA512_CBLOCK,
        sizeof (PK11_CIPHER_STATE),
        };

/*
 * Initialization function. Sets up various PKCS#11 library components.
 * The definitions for control commands specific to this engine
 */
#define PK11_CMD_SO_PATH                ENGINE_CMD_BASE
static const ENGINE_CMD_DEFN pk11_cmd_defns[] =
        {
                {
                PK11_CMD_SO_PATH,
                "SO_PATH",
                "Specifies the path to the 'pkcs#11' shared library",
                ENGINE_CMD_FLAG_STRING
                },
                {0, NULL, NULL, 0}
        };


static RAND_METHOD pk11_random =
        {
        pk11_rand_seed,
        pk11_rand_bytes,
        pk11_rand_cleanup,
        pk11_rand_add,
        pk11_rand_bytes,
        pk11_rand_status
        };


/* Constants used when creating the ENGINE */
static const char *engine_pk11_id = "pkcs11";
static const char *engine_pk11_name = "PKCS #11 engine support";

CK_FUNCTION_LIST_PTR pFuncList = NULL;
static const char PK11_GET_FUNCTION_LIST[] = "C_GetFunctionList";

/*
 * This is a static string constant for the DSO file name and the function
 * symbol names to bind to. We set it in the Configure script based on whether
 * this is 32 or 64 bit build.
 */
static const char def_PK11_LIBNAME[] = PK11_LIB_LOCATION;

static CK_BBOOL pk11_true = CK_TRUE;
static CK_BBOOL pk11_false = CK_FALSE;
/* Needed in hw_pk11_pub.c as well so that's why it is not static. */
CK_SLOT_ID pubkey_SLOTID = 0;
static CK_SLOT_ID rand_SLOTID = 0;
static CK_SLOT_ID SLOTID = 0;
static CK_BBOOL pk11_library_initialized = CK_FALSE;
static CK_BBOOL pk11_atfork_initialized = CK_FALSE;
static int pk11_pid = 0;

static DSO *pk11_dso = NULL;

/* allocate and initialize all locks used by the engine itself */
static int pk11_init_all_locks(void)
        {
        int type;

#ifndef OPENSSL_NO_RSA
        find_lock[OP_RSA] = OPENSSL_malloc(sizeof (pthread_mutex_t));
        if (find_lock[OP_RSA] == NULL)
                goto malloc_err;
        (void) pthread_mutex_init(find_lock[OP_RSA], NULL);
#endif /* OPENSSL_NO_RSA */

        if ((uri_lock = OPENSSL_malloc(sizeof (pthread_mutex_t))) == NULL)
                goto malloc_err;
        (void) pthread_mutex_init(uri_lock, NULL);

#ifndef OPENSSL_NO_DSA
        find_lock[OP_DSA] = OPENSSL_malloc(sizeof (pthread_mutex_t));
        if (find_lock[OP_DSA] == NULL)
                goto malloc_err;
        (void) pthread_mutex_init(find_lock[OP_DSA], NULL);
#endif /* OPENSSL_NO_DSA */

#ifndef OPENSSL_NO_DH
        find_lock[OP_DH] = OPENSSL_malloc(sizeof (pthread_mutex_t));
        if (find_lock[OP_DH] == NULL)
                goto malloc_err;
        (void) pthread_mutex_init(find_lock[OP_DH], NULL);
#endif /* OPENSSL_NO_DH */

        for (type = 0; type < OP_MAX; type++)
                {
                session_cache[type].lock =
                    OPENSSL_malloc(sizeof (pthread_mutex_t));
                if (session_cache[type].lock == NULL)
                        goto malloc_err;
                (void) pthread_mutex_init(session_cache[type].lock, NULL);
                }

        return (1);

malloc_err:
        pk11_free_all_locks();
        PK11err(PK11_F_INIT_ALL_LOCKS, PK11_R_MALLOC_FAILURE);
        return (0);
        }

static void pk11_free_all_locks(void)
        {
        int type;

#ifndef OPENSSL_NO_RSA
        if (find_lock[OP_RSA] != NULL)
                {
                (void) pthread_mutex_destroy(find_lock[OP_RSA]);
                OPENSSL_free(find_lock[OP_RSA]);
                find_lock[OP_RSA] = NULL;
                }
#endif /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
        if (find_lock[OP_DSA] != NULL)
                {
                (void) pthread_mutex_destroy(find_lock[OP_DSA]);
                OPENSSL_free(find_lock[OP_DSA]);
                find_lock[OP_DSA] = NULL;
                }
#endif /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
        if (find_lock[OP_DH] != NULL)
                {
                (void) pthread_mutex_destroy(find_lock[OP_DH]);
                OPENSSL_free(find_lock[OP_DH]);
                find_lock[OP_DH] = NULL;
                }
#endif /* OPENSSL_NO_DH */

        for (type = 0; type < OP_MAX; type++)
                {
                if (session_cache[type].lock != NULL)
                        {
                        (void) pthread_mutex_destroy(session_cache[type].lock);
                        OPENSSL_free(session_cache[type].lock);
                        session_cache[type].lock = NULL;
                        }
                }
        }

/*
 * This internal function is used by ENGINE_pk11() and "dynamic" ENGINE support.
 */
static int bind_pk11(ENGINE *e)
        {
#ifndef OPENSSL_NO_RSA
        const RSA_METHOD *rsa = NULL;
        RSA_METHOD *pk11_rsa = PK11_RSA();
#endif  /* OPENSSL_NO_RSA */
        if (!pk11_library_initialized)
                if (!pk11_library_init(e))
                        return (0);

        if (!ENGINE_set_id(e, engine_pk11_id) ||
            !ENGINE_set_name(e, engine_pk11_name) ||
            !ENGINE_set_ciphers(e, pk11_engine_ciphers) ||
            !ENGINE_set_digests(e, pk11_engine_digests))
                return (0);
#ifndef OPENSSL_NO_RSA
        if (pk11_have_rsa == CK_TRUE)
                {
                if (!ENGINE_set_RSA(e, PK11_RSA()) ||
                    !ENGINE_set_load_privkey_function(e, pk11_load_privkey) ||
                    !ENGINE_set_load_pubkey_function(e, pk11_load_pubkey))
                        return (0);
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: registered RSA\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                }
#endif  /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
        if (pk11_have_dsa == CK_TRUE)
                {
                if (!ENGINE_set_DSA(e, PK11_DSA()))
                        return (0);
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: registered DSA\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                }
#endif  /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
        if (pk11_have_dh == CK_TRUE)
                {
                if (!ENGINE_set_DH(e, PK11_DH()))
                        return (0);
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: registered DH\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                }
#endif  /* OPENSSL_NO_DH */
        if (pk11_have_random)
                {
                if (!ENGINE_set_RAND(e, &pk11_random))
                        return (0);
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: registered random\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                }
        if (!ENGINE_set_init_function(e, pk11_init) ||
            !ENGINE_set_destroy_function(e, pk11_destroy) ||
            !ENGINE_set_finish_function(e, pk11_finish) ||
            !ENGINE_set_ctrl_function(e, pk11_ctrl) ||
            !ENGINE_set_cmd_defns(e, pk11_cmd_defns))
                return (0);

/*
 * Apache calls OpenSSL function RSA_blinding_on() once during startup
 * which in turn calls bn_mod_exp. Since we do not implement bn_mod_exp
 * here, we wire it back to the OpenSSL software implementation.
 * Since it is used only once, performance is not a concern.
 */
#ifndef OPENSSL_NO_RSA
        rsa = RSA_PKCS1_SSLeay();
        pk11_rsa->rsa_mod_exp = rsa->rsa_mod_exp;
        pk11_rsa->bn_mod_exp = rsa->bn_mod_exp;
#endif  /* OPENSSL_NO_RSA */

        /* Ensure the pk11 error handling is set up */
        ERR_load_pk11_strings();

        return (1);
        }

/* Dynamic engine support is disabled at a higher level for Solaris */
#ifdef  ENGINE_DYNAMIC_SUPPORT
static int bind_helper(ENGINE *e, const char *id)
        {
        if (id && (strcmp(id, engine_pk11_id) != 0))
                return (0);

        if (!bind_pk11(e))
                return (0);

        return (1);
        }

IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)

#else
static ENGINE *engine_pk11(void)
        {
        ENGINE *ret = ENGINE_new();

        if (!ret)
                return (NULL);

        if (!bind_pk11(ret))
                {
                ENGINE_free(ret);
                return (NULL);
                }

        return (ret);
        }

void
ENGINE_load_pk11(void)
        {
        ENGINE *e_pk11 = NULL;

        /*
         * Do not use dynamic PKCS#11 library on Solaris due to
         * security reasons. We will link it in statically.
         */
        /* Attempt to load PKCS#11 library */
        if (!pk11_dso)
                pk11_dso = DSO_load(NULL, get_PK11_LIBNAME(), NULL, 0);

        if (pk11_dso == NULL)
                {
                PK11err(PK11_F_LOAD, PK11_R_DSO_FAILURE);
                return;
                }

        e_pk11 = engine_pk11();
        if (!e_pk11)
                {
                DSO_free(pk11_dso);
                pk11_dso = NULL;
                return;
                }

        /*
         * At this point, the pk11 shared library is either dynamically
         * loaded or statically linked in. So, initialize the pk11
         * library before calling ENGINE_set_default since the latter
         * needs cipher and digest algorithm information
         */
        if (!pk11_library_init(e_pk11))
                {
                DSO_free(pk11_dso);
                pk11_dso = NULL;
                ENGINE_free(e_pk11);
                return;
                }

        ENGINE_add(e_pk11);

        ENGINE_free(e_pk11);
        ERR_clear_error();
        }
#endif  /* ENGINE_DYNAMIC_SUPPORT */

/*
 * These are the static string constants for the DSO file name and
 * the function symbol names to bind to.
 */
static const char *PK11_LIBNAME = NULL;

static const char *get_PK11_LIBNAME(void)
        {
        if (PK11_LIBNAME)
                return (PK11_LIBNAME);

        return (def_PK11_LIBNAME);
        }

static void free_PK11_LIBNAME(void)
        {
        if (PK11_LIBNAME)
                OPENSSL_free((void*)PK11_LIBNAME);

        PK11_LIBNAME = NULL;
        }

static long set_PK11_LIBNAME(const char *name)
        {
        free_PK11_LIBNAME();

        return ((PK11_LIBNAME = BUF_strdup(name)) != NULL ? 1 : 0);
        }

/* acquire all engine specific mutexes before fork */
static void pk11_fork_prepare(void)
        {
        int i;

        if (!pk11_library_initialized)
                return;

        LOCK_OBJSTORE(OP_RSA);
        LOCK_OBJSTORE(OP_DSA);
        LOCK_OBJSTORE(OP_DH);
        (void) pthread_mutex_lock(uri_lock);
        for (i = 0; i < OP_MAX; i++)
                {
                (void) pthread_mutex_lock(session_cache[i].lock);
                }
        }

/* release all engine specific mutexes */
static void pk11_fork_parent(void)
        {
        int i;

        if (!pk11_library_initialized)
                return;

        for (i = OP_MAX - 1; i >= 0; i--)
                {
                (void) pthread_mutex_unlock(session_cache[i].lock);
                }
        UNLOCK_OBJSTORE(OP_DH);
        UNLOCK_OBJSTORE(OP_DSA);
        UNLOCK_OBJSTORE(OP_RSA);
        (void) pthread_mutex_unlock(uri_lock);
        }

/*
 * same situation as in parent - we need to unlock all locks to make them
 * accessible to all threads.
 */
static void pk11_fork_child(void)
        {
        int i;

        if (!pk11_library_initialized)
                return;

        for (i = OP_MAX - 1; i >= 0; i--)
                {
                (void) pthread_mutex_unlock(session_cache[i].lock);
                }
        UNLOCK_OBJSTORE(OP_DH);
        UNLOCK_OBJSTORE(OP_DSA);
        UNLOCK_OBJSTORE(OP_RSA);
        (void) pthread_mutex_unlock(uri_lock);
        }

/* Initialization function for the pk11 engine */
static int pk11_init(ENGINE *e)
{
        return (pk11_library_init(e));
}

/*
 * Initialization function. Sets up various PKCS#11 library components.
 * It selects a slot based on predefined critiera. In the process, it also
 * count how many ciphers and digests to support. Since the cipher and
 * digest information is needed when setting default engine, this function
 * needs to be called before calling ENGINE_set_default.
 */
/* ARGSUSED */
static int pk11_library_init(ENGINE *e)
        {
        CK_C_GetFunctionList p;
        CK_RV rv = CKR_OK;
        CK_INFO info;
        CK_ULONG ul_state_len;
        int any_slot_found;
        int i;

        /*
         * pk11_library_initialized is set to 0 in pk11_finish() which is called
         * from ENGINE_finish(). However, if there is still at least one
         * existing functional reference to the engine (see engine(3) for more
         * information), pk11_finish() is skipped. For example, this can happen
         * if an application forgets to clear one cipher context. In case of a
         * fork() when the application is finishing the engine so that it can be
         * reinitialized in the child, forgotten functional reference causes
         * pk11_library_initialized to stay 1. In that case we need the PID
         * check so that we properly initialize the engine again.
         */
        if (pk11_library_initialized)
                {
                if (pk11_pid == getpid())
                        {
                        return (1);
                        }
                else
                        {
                        global_session = CK_INVALID_HANDLE;
                        /*
                         * free the locks first to prevent memory leak in case
                         * the application calls fork() without finishing the
                         * engine first.
                         */
                        pk11_free_all_locks();
                        }
                }

        if (pk11_dso == NULL)
                {
                PK11err(PK11_F_LIBRARY_INIT, PK11_R_DSO_FAILURE);
                goto err;
                }

#ifdef  SOLARIS_AES_CTR
        /*
         * We must do this before we start working with slots since we need all
         * NIDs there.
         */
        if (pk11_add_aes_ctr_NIDs() == 0)
                goto err;
#endif  /* SOLARIS_AES_CTR */

#ifdef  SOLARIS_HW_SLOT_SELECTION
        if (check_hw_mechanisms() == 0)
                goto err;
#endif  /* SOLARIS_HW_SLOT_SELECTION */

        /* get the C_GetFunctionList function from the loaded library */
        p = (CK_C_GetFunctionList)DSO_bind_func(pk11_dso,
                PK11_GET_FUNCTION_LIST);
        if (!p)
                {
                PK11err(PK11_F_LIBRARY_INIT, PK11_R_DSO_FAILURE);
                goto err;
                }

        /* get the full function list from the loaded library */
        rv = p(&pFuncList);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_LIBRARY_INIT, PK11_R_DSO_FAILURE, rv);
                goto err;
                }

        rv = pFuncList->C_Initialize(NULL_PTR);
        if ((rv != CKR_OK) && (rv != CKR_CRYPTOKI_ALREADY_INITIALIZED))
                {
                PK11err_add_data(PK11_F_LIBRARY_INIT, PK11_R_INITIALIZE, rv);
                goto err;
                }

        rv = pFuncList->C_GetInfo(&info);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_LIBRARY_INIT, PK11_R_GETINFO, rv);
                goto err;
                }

        if (pk11_choose_slots(&any_slot_found) == 0)
                goto err;

        /*
         * The library we use, set in def_PK11_LIBNAME, may not offer any
         * slot(s). In that case, we must not proceed but we must not return an
         * error. The reason is that applications that try to set up the PKCS#11
         * engine don't exit on error during the engine initialization just
         * because no slot was present.
         */
        if (any_slot_found == 0)
                return (1);

        if (global_session == CK_INVALID_HANDLE)
                {
                /* Open the global_session for the new process */
                rv = pFuncList->C_OpenSession(SLOTID, CKF_SERIAL_SESSION,
                        NULL_PTR, NULL_PTR, &global_session);
                if (rv != CKR_OK)
                        {
                        PK11err_add_data(PK11_F_LIBRARY_INIT,
                            PK11_R_OPENSESSION, rv);
                        goto err;
                        }
                }

        /*
         * Disable digest if C_GetOperationState is not supported since
         * this function is required by OpenSSL digest copy function
         */
        if (pFuncList->C_GetOperationState(global_session, NULL, &ul_state_len)
                        == CKR_FUNCTION_NOT_SUPPORTED) {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: C_GetOperationState() not supported, "
                    "setting digest_count to 0\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                digest_count = 0;
        }

        pk11_library_initialized = CK_TRUE;
        pk11_pid = getpid();
        /*
         * if initialization of the locks fails pk11_init_all_locks()
         * will do the cleanup.
         */
        if (!pk11_init_all_locks())
                goto err;
        for (i = 0; i < OP_MAX; i++)
                session_cache[i].head = NULL;
        /*
         * initialize active lists. We only use active lists
         * for asymmetric ciphers.
         */
        for (i = 0; i < OP_MAX; i++)
                active_list[i] = NULL;

        if (!pk11_atfork_initialized)
                {
                if (pthread_atfork(pk11_fork_prepare, pk11_fork_parent,
                    pk11_fork_child) != 0)
                        {
                        PK11err(PK11_F_LIBRARY_INIT, PK11_R_ATFORK_FAILED);
                        goto err;
                        }
                pk11_atfork_initialized = CK_TRUE;
                }

        return (1);

err:
        return (0);
        }

/* Destructor (complements the "ENGINE_pk11()" constructor) */
/* ARGSUSED */
static int pk11_destroy(ENGINE *e)
        {
        free_PK11_LIBNAME();
        ERR_unload_pk11_strings();
        return (1);
        }

/*
 * Termination function to clean up the session, the token, and the pk11
 * library.
 */
/* ARGSUSED */
static int pk11_finish(ENGINE *e)
        {
        int i;

        if (pk11_dso == NULL)
                {
                PK11err(PK11_F_FINISH, PK11_R_NOT_LOADED);
                goto err;
                }

        OPENSSL_assert(pFuncList != NULL);

        if (pk11_free_all_sessions() == 0)
                goto err;

        /* free all active lists */
        for (i = 0; i < OP_MAX; i++)
                pk11_free_active_list(i);

        pFuncList->C_CloseSession(global_session);
        global_session = CK_INVALID_HANDLE;

        /*
         * Since we are part of a library (libcrypto.so), calling this function
         * may have side-effects.
         */
#if 0
        pFuncList->C_Finalize(NULL);
#endif
#ifdef  SOLARIS_AES_CTR
        {
                ASN1_OBJECT *ob = NULL;
                if (NID_aes_128_ctr != NID_undef) {
                        ob = OBJ_nid2obj(NID_aes_128_ctr);
                        if (ob != NULL)
                                ASN1_OBJECT_free(ob);
                }
                if (NID_aes_192_ctr != NID_undef) {
                        ob = OBJ_nid2obj(NID_aes_192_ctr);
                        if (ob != NULL)
                                ASN1_OBJECT_free(ob);
                }
                if (NID_aes_256_ctr != NID_undef) {
                        ob = OBJ_nid2obj(NID_aes_256_ctr);
                        if (ob != NULL)
                                ASN1_OBJECT_free(ob);
                }
        }
#endif

        if (!DSO_free(pk11_dso))
                {
                PK11err(PK11_F_FINISH, PK11_R_DSO_FAILURE);
                goto err;
                }
        pk11_dso = NULL;
        pFuncList = NULL;
        pk11_library_initialized = CK_FALSE;
        pk11_pid = 0;
        /*
         * There is no way how to unregister atfork handlers (other than
         * unloading the library) so we just free the locks. For this reason
         * the atfork handlers check if the engine is initialized and bail out
         * immediately if not. This is necessary in case a process finishes
         * the engine before calling fork().
         */
        pk11_free_all_locks();

        return (1);

err:
        return (0);
        }

/* Standard engine interface function to set the dynamic library path */
/* ARGSUSED */
static int pk11_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
        {
        int initialized = ((pk11_dso == NULL) ? 0 : 1);

        switch (cmd)
                {
        case PK11_CMD_SO_PATH:
                if (p == NULL)
                        {
                        PK11err(PK11_F_CTRL, ERR_R_PASSED_NULL_PARAMETER);
                        return (0);
                        }

                if (initialized)
                        {
                        PK11err(PK11_F_CTRL, PK11_R_ALREADY_LOADED);
                        return (0);
                        }

                return (set_PK11_LIBNAME((const char *)p));
        default:
                break;
                }

        PK11err(PK11_F_CTRL, PK11_R_CTRL_COMMAND_NOT_IMPLEMENTED);

        return (0);
        }


/* Required function by the engine random interface. It does nothing here */
static void pk11_rand_cleanup(void)
        {
        return;
        }

/* ARGSUSED */
static void pk11_rand_add(const void *buf, int num, double add)
        {
        PK11_SESSION *sp;

        if ((sp = pk11_get_session(OP_RAND)) == NULL)
                return;

        /*
         * Ignore any errors (e.g. CKR_RANDOM_SEED_NOT_SUPPORTED) since
         * the calling functions do not care anyway
         */
        pFuncList->C_SeedRandom(sp->session, (unsigned char *) buf, num);
        pk11_return_session(sp, OP_RAND);

        return;
        }

static void pk11_rand_seed(const void *buf, int num)
        {
        pk11_rand_add(buf, num, 0);
        }

static int pk11_rand_bytes(unsigned char *buf, int num)
        {
        CK_RV rv;
        PK11_SESSION *sp;

        if ((sp = pk11_get_session(OP_RAND)) == NULL)
                return (0);

        rv = pFuncList->C_GenerateRandom(sp->session, buf, num);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_RAND_BYTES, PK11_R_GENERATERANDOM, rv);
                pk11_return_session(sp, OP_RAND);
                return (0);
                }

        pk11_return_session(sp, OP_RAND);
        return (1);
        }

/* Required function by the engine random interface. It does nothing here */
static int pk11_rand_status(void)
        {
        return (1);
        }

/* Free all BIGNUM structures from PK11_SESSION. */
static void pk11_free_nums(PK11_SESSION *sp, PK11_OPTYPE optype)
        {
        switch (optype)
                {
#ifndef OPENSSL_NO_RSA
                case OP_RSA:
                        if (sp->opdata_rsa_n_num != NULL)
                                {
                                BN_free(sp->opdata_rsa_n_num);
                                sp->opdata_rsa_n_num = NULL;
                                }
                        if (sp->opdata_rsa_e_num != NULL)
                                {
                                BN_free(sp->opdata_rsa_e_num);
                                sp->opdata_rsa_e_num = NULL;
                                }
                        if (sp->opdata_rsa_d_num != NULL)
                                {
                                BN_free(sp->opdata_rsa_d_num);
                                sp->opdata_rsa_d_num = NULL;
                                }
                        break;
#endif
#ifndef OPENSSL_NO_DSA
                case OP_DSA:
                        if (sp->opdata_dsa_pub_num != NULL)
                                {
                                BN_free(sp->opdata_dsa_pub_num);
                                sp->opdata_dsa_pub_num = NULL;
                                }
                        if (sp->opdata_dsa_priv_num != NULL)
                                {
                                BN_free(sp->opdata_dsa_priv_num);
                                sp->opdata_dsa_priv_num = NULL;
                                }
                        break;
#endif
#ifndef OPENSSL_NO_DH
                case OP_DH:
                        if (sp->opdata_dh_priv_num != NULL)
                                {
                                BN_free(sp->opdata_dh_priv_num);
                                sp->opdata_dh_priv_num = NULL;
                                }
                        break;
#endif
                default:
                        break;
                }
        }

/*
 * Get new PK11_SESSION structure ready for use. Every process must have
 * its own freelist of PK11_SESSION structures so handle fork() here
 * by destroying the old and creating new freelist.
 * The returned PK11_SESSION structure is disconnected from the freelist.
 */
PK11_SESSION *
pk11_get_session(PK11_OPTYPE optype)
        {
        PK11_SESSION *sp = NULL, *sp1, *freelist;
        pthread_mutex_t *freelist_lock;
        static pid_t pid = 0;
        pid_t new_pid;
        CK_RV rv;

        switch (optype)
                {
                case OP_RSA:
                case OP_DSA:
                case OP_DH:
                case OP_RAND:
                case OP_DIGEST:
                case OP_CIPHER:
                        freelist_lock = session_cache[optype].lock;
                        break;
                default:
                        PK11err(PK11_F_GET_SESSION,
                                PK11_R_INVALID_OPERATION_TYPE);
                        return (NULL);
                }
        (void) pthread_mutex_lock(freelist_lock);

        /*
         * Will use it to find out if we forked. We cannot use the PID field in
         * the session structure because we could get a newly allocated session
         * here, with no PID information.
         */
        if (pid == 0)
                pid = getpid();

        freelist = session_cache[optype].head;
        sp = freelist;

        /*
         * If the free list is empty, allocate new unitialized (filled
         * with zeroes) PK11_SESSION structure otherwise return first
         * structure from the freelist.
         */
        if (sp == NULL)
                {
                if ((sp = OPENSSL_malloc(sizeof (PK11_SESSION))) == NULL)
                        {
                        PK11err(PK11_F_GET_SESSION,
                                PK11_R_MALLOC_FAILURE);
                        goto err;
                        }
                (void) memset(sp, 0, sizeof (PK11_SESSION));

                /*
                 * It is a new session so it will look like a cache miss to the
                 * code below. So, we must not try to to destroy its members so
                 * mark them as unused.
                 */
                sp->opdata_rsa_priv_key = CK_INVALID_HANDLE;
                sp->opdata_rsa_pub_key = CK_INVALID_HANDLE;
                }
        else
                freelist = sp->next;

        /*
         * Check whether we have forked. In that case, we must get rid of all
         * inherited sessions and start allocating new ones.
         */
        if (pid != (new_pid = getpid()))
                {
                pid = new_pid;

                /*
                 * We are a new process and thus need to free any inherited
                 * PK11_SESSION objects aside from the first session (sp) which
                 * is the only PK11_SESSION structure we will reuse (for the
                 * head of the list).
                 */
                while ((sp1 = freelist) != NULL)
                        {
                        freelist = sp1->next;
                        /*
                         * NOTE: we do not want to call pk11_free_all_sessions()
                         * here because it would close underlying PKCS#11
                         * sessions and destroy all objects.
                         */
                        pk11_free_nums(sp1, optype);
                        OPENSSL_free(sp1);
                        }

                /* we have to free the active list as well. */
                pk11_free_active_list(optype);

                /* Initialize the process */
                rv = pFuncList->C_Initialize(NULL_PTR);
                if ((rv != CKR_OK) && (rv != CKR_CRYPTOKI_ALREADY_INITIALIZED))
                        {
                        PK11err_add_data(PK11_F_GET_SESSION, PK11_R_INITIALIZE,
                            rv);
                        OPENSSL_free(sp);
                        sp = NULL;
                        goto err;
                        }

                /*
                 * Choose slot here since the slot table is different on this
                 * process. If we are here then we must have found at least one
                 * usable slot before so we don't need to check any_slot_found.
                 * See pk11_library_init()'s usage of this function for more
                 * information.
                 */
#ifdef  SOLARIS_HW_SLOT_SELECTION
                if (check_hw_mechanisms() == 0)
                        goto err;
#endif  /* SOLARIS_HW_SLOT_SELECTION */
                if (pk11_choose_slots(NULL) == 0)
                        goto err;

                /* Open the global_session for the new process */
                rv = pFuncList->C_OpenSession(SLOTID, CKF_SERIAL_SESSION,
                        NULL_PTR, NULL_PTR, &global_session);
                if (rv != CKR_OK)
                        {
                        PK11err_add_data(PK11_F_GET_SESSION, PK11_R_OPENSESSION,
                            rv);
                        OPENSSL_free(sp);
                        sp = NULL;
                        goto err;
                        }

                /*
                 * It is an inherited session from our parent so it needs
                 * re-initialization.
                 */
                if (pk11_setup_session(sp, optype) == 0)
                        {
                        OPENSSL_free(sp);
                        sp = NULL;
                        goto err;
                        }
                if (pk11_token_relogin(sp->session) == 0)
                        {
                        /*
                         * We will keep the session in the cache list and let
                         * the caller cope with the situation.
                         */
                        freelist = sp;
                        sp = NULL;
                        goto err;
                        }
                }

        if (sp->pid == 0)
                {
                /* It is a new session and needs initialization. */
                if (pk11_setup_session(sp, optype) == 0)
                        {
                        OPENSSL_free(sp);
                        sp = NULL;
                        }
                }

        /* set new head for the list of PK11_SESSION objects */
        session_cache[optype].head = freelist;

err:
        if (sp != NULL)
                sp->next = NULL;

        (void) pthread_mutex_unlock(freelist_lock);

        return (sp);
        }


void
pk11_return_session(PK11_SESSION *sp, PK11_OPTYPE optype)
        {
        pthread_mutex_t *freelist_lock;
        PK11_SESSION *freelist;

        /*
         * If this is a session from the parent it will be taken care of and
         * freed in pk11_get_session() as part of the post-fork clean up the
         * next time we will ask for a new session.
         */
        if (sp == NULL || sp->pid != getpid())
                return;

        switch (optype)
                {
                case OP_RSA:
                case OP_DSA:
                case OP_DH:
                case OP_RAND:
                case OP_DIGEST:
                case OP_CIPHER:
                        freelist_lock = session_cache[optype].lock;
                        break;
                default:
                        PK11err(PK11_F_RETURN_SESSION,
                                PK11_R_INVALID_OPERATION_TYPE);
                        return;
                }

        (void) pthread_mutex_lock(freelist_lock);
        freelist = session_cache[optype].head;
        sp->next = freelist;
        session_cache[optype].head = sp;
        (void) pthread_mutex_unlock(freelist_lock);
        }


/* Destroy all objects. This function is called when the engine is finished */
static int pk11_free_all_sessions()
        {
        int ret = 1;
        int type;

#ifndef OPENSSL_NO_RSA
        (void) pk11_destroy_rsa_key_objects(NULL);
#endif  /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
        (void) pk11_destroy_dsa_key_objects(NULL);
#endif  /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
        (void) pk11_destroy_dh_key_objects(NULL);
#endif  /* OPENSSL_NO_DH */
        (void) pk11_destroy_cipher_key_objects(NULL);

        /*
         * We try to release as much as we can but any error means that we will
         * return 0 on exit.
         */
        for (type = 0; type < OP_MAX; type++)
                {
                if (pk11_free_session_list(type) == 0)
                        ret = 0;
                }

        return (ret);
        }

/*
 * Destroy session structures from the linked list specified. Free as many
 * sessions as possible but any failure in C_CloseSession() means that we
 * return an error on return.
 */
static int pk11_free_session_list(PK11_OPTYPE optype)
        {
        CK_RV rv;
        PK11_SESSION *sp = NULL;
        PK11_SESSION *freelist = NULL;
        pid_t mypid = getpid();
        pthread_mutex_t *freelist_lock;
        int ret = 1;

        switch (optype)
                {
                case OP_RSA:
                case OP_DSA:
                case OP_DH:
                case OP_RAND:
                case OP_DIGEST:
                case OP_CIPHER:
                        freelist_lock = session_cache[optype].lock;
                        break;
                default:
                        PK11err(PK11_F_FREE_ALL_SESSIONS,
                                PK11_R_INVALID_OPERATION_TYPE);
                        return (0);
                }

        (void) pthread_mutex_lock(freelist_lock);
        freelist = session_cache[optype].head;
        while ((sp = freelist) != NULL)
                {
                if (sp->session != CK_INVALID_HANDLE && sp->pid == mypid)
                        {
                        rv = pFuncList->C_CloseSession(sp->session);
                        if (rv != CKR_OK)
                                {
                                PK11err_add_data(PK11_F_FREE_ALL_SESSIONS,
                                        PK11_R_CLOSESESSION, rv);
                                ret = 0;
                                }
                        }
                freelist = sp->next;
                pk11_free_nums(sp, optype);
                OPENSSL_free(sp);
                }

        (void) pthread_mutex_unlock(freelist_lock);
        return (ret);
        }


static int
pk11_setup_session(PK11_SESSION *sp, PK11_OPTYPE optype)
        {
        CK_RV rv;
        CK_SLOT_ID myslot;

        switch (optype)
                {
                case OP_RSA:
                case OP_DSA:
                case OP_DH:
                        myslot = pubkey_SLOTID;
                        break;
                case OP_RAND:
                        myslot = rand_SLOTID;
                        break;
                case OP_DIGEST:
                case OP_CIPHER:
                        myslot = SLOTID;
                        break;
                default:
                        PK11err(PK11_F_SETUP_SESSION,
                            PK11_R_INVALID_OPERATION_TYPE);
                        return (0);
                }

        sp->session = CK_INVALID_HANDLE;
#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: myslot=%d optype=%d\n", PK11_DBG, myslot, optype);
#endif  /* DEBUG_SLOT_SELECTION */
        rv = pFuncList->C_OpenSession(myslot, CKF_SERIAL_SESSION,
                NULL_PTR, NULL_PTR, &sp->session);
        if (rv == CKR_CRYPTOKI_NOT_INITIALIZED)
                {
                /*
                 * We are probably a child process so force the
                 * reinitialize of the session
                 */
                pk11_library_initialized = CK_FALSE;
                if (!pk11_library_init(NULL))
                        return (0);
                rv = pFuncList->C_OpenSession(myslot, CKF_SERIAL_SESSION,
                        NULL_PTR, NULL_PTR, &sp->session);
                }
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_SETUP_SESSION, PK11_R_OPENSESSION, rv);
                return (0);
                }

        sp->pid = getpid();

        switch (optype)
                {
#ifndef OPENSSL_NO_RSA
                case OP_RSA:
                        sp->opdata_rsa_pub_key = CK_INVALID_HANDLE;
                        sp->opdata_rsa_priv_key = CK_INVALID_HANDLE;
                        sp->opdata_rsa_pub = NULL;
                        sp->opdata_rsa_n_num = NULL;
                        sp->opdata_rsa_e_num = NULL;
                        sp->opdata_rsa_priv = NULL;
                        sp->opdata_rsa_d_num = NULL;
                        break;
#endif  /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
                case OP_DSA:
                        sp->opdata_dsa_pub_key = CK_INVALID_HANDLE;
                        sp->opdata_dsa_priv_key = CK_INVALID_HANDLE;
                        sp->opdata_dsa_pub = NULL;
                        sp->opdata_dsa_pub_num = NULL;
                        sp->opdata_dsa_priv = NULL;
                        sp->opdata_dsa_priv_num = NULL;
                        break;
#endif  /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
                case OP_DH:
                        sp->opdata_dh_key = CK_INVALID_HANDLE;
                        sp->opdata_dh = NULL;
                        sp->opdata_dh_priv_num = NULL;
                        break;
#endif  /* OPENSSL_NO_DH */
                case OP_CIPHER:
                        sp->opdata_cipher_key = CK_INVALID_HANDLE;
                        sp->opdata_encrypt = -1;
                        break;
                }

        /*
         * We always initialize the session as containing a non-persistent
         * object. The key load functions set it to persistent if that is so.
         */
        sp->persistent = CK_FALSE;
        return (1);
        }

#ifndef OPENSSL_NO_RSA
/*
 * Destroy all non-NULL RSA parameters. For the RSA keys by reference code,
 * public components 'n'/'e' are the key components we use to check for the
 * cache hit even for the private keys. So, no matter whether we are destroying
 * a public or a private key, we always free what we can.
 */
static void
destroy_all_rsa_params(PK11_SESSION *sp)
        {
        if (sp->opdata_rsa_n_num != NULL)
                {
                BN_free(sp->opdata_rsa_n_num);
                sp->opdata_rsa_n_num = NULL;
                }
        if (sp->opdata_rsa_e_num != NULL)
                {
                BN_free(sp->opdata_rsa_e_num);
                sp->opdata_rsa_e_num = NULL;
                }
        if (sp->opdata_rsa_d_num != NULL)
                {
                BN_free(sp->opdata_rsa_d_num);
                sp->opdata_rsa_d_num = NULL;
                }
        }

/* Destroy RSA public key from single session. */
int
pk11_destroy_rsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock)
        {
        int ret = 0;

        if (sp->opdata_rsa_pub_key != CK_INVALID_HANDLE)
                {
                TRY_OBJ_DESTROY(sp, sp->opdata_rsa_pub_key,
                    ret, uselock, OP_RSA);
                sp->opdata_rsa_pub_key = CK_INVALID_HANDLE;
                sp->opdata_rsa_pub = NULL;
                destroy_all_rsa_params(sp);
                }

        return (ret);
        }

/* Destroy RSA private key from single session. */
int
pk11_destroy_rsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock)
        {
        int ret = 0;

        if (sp->opdata_rsa_priv_key != CK_INVALID_HANDLE)
                {
                TRY_OBJ_DESTROY(sp, sp->opdata_rsa_priv_key,
                    ret, uselock, OP_RSA);
                sp->opdata_rsa_priv_key = CK_INVALID_HANDLE;
                sp->opdata_rsa_priv = NULL;
                destroy_all_rsa_params(sp);
                }

        return (ret);
        }

/*
 * Destroy RSA key object wrapper. If session is NULL, try to destroy all
 * objects in the free list.
 */
int
pk11_destroy_rsa_key_objects(PK11_SESSION *session)
        {
        int ret = 1;
        PK11_SESSION *sp = NULL;
        PK11_SESSION *local_free_session;
        CK_BBOOL uselock = CK_TRUE;

        if (session != NULL)
                local_free_session = session;
        else
                {
                (void) pthread_mutex_lock(session_cache[OP_RSA].lock);
                local_free_session = session_cache[OP_RSA].head;
                uselock = CK_FALSE;
                }

        /*
         * go through the list of sessions and delete key objects
         */
        while ((sp = local_free_session) != NULL)
                {
                local_free_session = sp->next;

                /*
                 * Do not terminate list traversal if one of the
                 * destroy operations fails.
                 */
                if (pk11_destroy_rsa_object_pub(sp, uselock) == 0)
                        {
                        ret = 0;
                        continue;
                        }
                if (pk11_destroy_rsa_object_priv(sp, uselock) == 0)
                        {
                        ret = 0;
                        continue;
                        }
                }

        if (session == NULL)
                (void) pthread_mutex_unlock(session_cache[OP_RSA].lock);

        return (ret);
        }
#endif  /* OPENSSL_NO_RSA */

#ifndef OPENSSL_NO_DSA
/* Destroy DSA public key from single session. */
int
pk11_destroy_dsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock)
        {
        int ret = 0;

        if (sp->opdata_dsa_pub_key != CK_INVALID_HANDLE)
                {
                TRY_OBJ_DESTROY(sp, sp->opdata_dsa_pub_key,
                    ret, uselock, OP_DSA);
                sp->opdata_dsa_pub_key = CK_INVALID_HANDLE;
                sp->opdata_dsa_pub = NULL;
                if (sp->opdata_dsa_pub_num != NULL)
                        {
                        BN_free(sp->opdata_dsa_pub_num);
                        sp->opdata_dsa_pub_num = NULL;
                        }
                }

        return (ret);
        }

/* Destroy DSA private key from single session. */
int
pk11_destroy_dsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock)
        {
        int ret = 0;

        if (sp->opdata_dsa_priv_key != CK_INVALID_HANDLE)
                {
                TRY_OBJ_DESTROY(sp, sp->opdata_dsa_priv_key,
                    ret, uselock, OP_DSA);
                sp->opdata_dsa_priv_key = CK_INVALID_HANDLE;
                sp->opdata_dsa_priv = NULL;
                if (sp->opdata_dsa_priv_num != NULL)
                        {
                        BN_free(sp->opdata_dsa_priv_num);
                        sp->opdata_dsa_priv_num = NULL;
                        }
                }

        return (ret);
        }

/*
 * Destroy DSA key object wrapper. If session is NULL, try to destroy all
 * objects in the free list.
 */
int
pk11_destroy_dsa_key_objects(PK11_SESSION *session)
        {
        int ret = 1;
        PK11_SESSION *sp = NULL;
        PK11_SESSION *local_free_session;
        CK_BBOOL uselock = CK_TRUE;

        if (session != NULL)
                local_free_session = session;
        else
                {
                (void) pthread_mutex_lock(session_cache[OP_DSA].lock);
                local_free_session = session_cache[OP_DSA].head;
                uselock = CK_FALSE;
                }

        /*
         * go through the list of sessions and delete key objects
         */
        while ((sp = local_free_session) != NULL)
                {
                local_free_session = sp->next;

                /*
                 * Do not terminate list traversal if one of the
                 * destroy operations fails.
                 */
                if (pk11_destroy_dsa_object_pub(sp, uselock) == 0)
                        {
                        ret = 0;
                        continue;
                        }
                if (pk11_destroy_dsa_object_priv(sp, uselock) == 0)
                        {
                        ret = 0;
                        continue;
                        }
                }

        if (session == NULL)
                (void) pthread_mutex_unlock(session_cache[OP_DSA].lock);

        return (ret);
        }
#endif  /* OPENSSL_NO_DSA */

#ifndef OPENSSL_NO_DH
/* Destroy DH key from single session. */
int
pk11_destroy_dh_object(PK11_SESSION *sp, CK_BBOOL uselock)
        {
        int ret = 0;

        if (sp->opdata_dh_key != CK_INVALID_HANDLE)
                {
                TRY_OBJ_DESTROY(sp, sp->opdata_dh_key,
                    ret, uselock, OP_DH);
                sp->opdata_dh_key = CK_INVALID_HANDLE;
                sp->opdata_dh = NULL;
                if (sp->opdata_dh_priv_num != NULL)
                        {
                        BN_free(sp->opdata_dh_priv_num);
                        sp->opdata_dh_priv_num = NULL;
                        }
                }

        return (ret);
        }

/*
 * Destroy DH key object wrapper.
 *
 * arg0: pointer to PKCS#11 engine session structure
 *       if session is NULL, try to destroy all objects in the free list
 */
int
pk11_destroy_dh_key_objects(PK11_SESSION *session)
        {
        int ret = 1;
        PK11_SESSION *sp = NULL;
        PK11_SESSION *local_free_session;
        CK_BBOOL uselock = CK_TRUE;

        if (session != NULL)
                local_free_session = session;
        else
                {
                (void) pthread_mutex_lock(session_cache[OP_DH].lock);
                local_free_session = session_cache[OP_DH].head;
                uselock = CK_FALSE;
                }

        while ((sp = local_free_session) != NULL)
                {
                local_free_session = sp->next;

                /*
                 * Do not terminate list traversal if one of the
                 * destroy operations fails.
                 */
                if (pk11_destroy_dh_object(sp, uselock) == 0)
                        {
                        ret = 0;
                        continue;
                        }
                }
err:
        if (session == NULL)
                (void) pthread_mutex_unlock(session_cache[OP_DH].lock);

        return (ret);
        }
#endif  /* OPENSSL_NO_DH */

static int
pk11_destroy_object(CK_SESSION_HANDLE session, CK_OBJECT_HANDLE oh,
    CK_BBOOL persistent)
        {
        CK_RV rv;

        /*
         * We never try to destroy persistent objects which are the objects
         * stored in the keystore. Also, we always use read-only sessions so
         * C_DestroyObject() would be returning CKR_SESSION_READ_ONLY here.
         */
        if (persistent == CK_TRUE)
                return (1);

        rv = pFuncList->C_DestroyObject(session, oh);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DESTROY_OBJECT, PK11_R_DESTROYOBJECT,
                    rv);
                return (0);
                }

        return (1);
        }


/* Symmetric ciphers and digests support functions */

static int
cipher_nid_to_pk11(int nid)
        {
        int i;

        for (i = 0; i < PK11_CIPHER_MAX; i++)
                if (ciphers[i].nid == nid)
                        return (ciphers[i].id);
        return (-1);
        }

static int
pk11_usable_ciphers(const int **nids)
        {
        if (cipher_count > 0)
                *nids = cipher_nids;
        else
                *nids = NULL;
        return (cipher_count);
        }

static int
pk11_usable_digests(const int **nids)
        {
        if (digest_count > 0)
                *nids = digest_nids;
        else
                *nids = NULL;
        return (digest_count);
        }

/*
 * Init context for encryption or decryption using a symmetric key.
 */
static int pk11_init_symmetric(EVP_CIPHER_CTX *ctx, PK11_CIPHER *pcipher,
        PK11_SESSION *sp, CK_MECHANISM_PTR pmech)
        {
        CK_RV rv;
#ifdef  SOLARIS_AES_CTR
        CK_AES_CTR_PARAMS ctr_params;
#endif  /* SOLARIS_AES_CTR */

        /*
         * We expect pmech->mechanism to be already set and
         * pParameter/ulParameterLen initialized to NULL/0 before
         * pk11_init_symetric() is called.
         */
        OPENSSL_assert(pmech->mechanism != NULL);
        OPENSSL_assert(pmech->pParameter == NULL);
        OPENSSL_assert(pmech->ulParameterLen == 0);

#ifdef  SOLARIS_AES_CTR
        if (ctx->cipher->nid == NID_aes_128_ctr ||
            ctx->cipher->nid == NID_aes_192_ctr ||
            ctx->cipher->nid == NID_aes_256_ctr)
                {
                pmech->pParameter = (void *)(&ctr_params);
                pmech->ulParameterLen = sizeof (ctr_params);
                /*
                 * For now, we are limited to the fixed length of the counter,
                 * it covers the whole counter block. That's what RFC 4344
                 * needs. For more information on internal structure of the
                 * counter block, see RFC 3686. If needed in the future, we can
                 * add code so that the counter length can be set via
                 * ENGINE_ctrl() function.
                 */
                ctr_params.ulCounterBits = AES_BLOCK_SIZE * 8;
                OPENSSL_assert(pcipher->iv_len == AES_BLOCK_SIZE);
                (void) memcpy(ctr_params.cb, ctx->iv, AES_BLOCK_SIZE);
                }
        else
#endif  /* SOLARIS_AES_CTR */
                {
                if (pcipher->iv_len > 0)
                        {
                        pmech->pParameter = (void *)ctx->iv;
                        pmech->ulParameterLen = pcipher->iv_len;
                        }
                }

        /* if we get here, the encryption needs to be reinitialized */
        if (ctx->encrypt)
                rv = pFuncList->C_EncryptInit(sp->session, pmech,
                        sp->opdata_cipher_key);
        else
                rv = pFuncList->C_DecryptInit(sp->session, pmech,
                        sp->opdata_cipher_key);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_CIPHER_INIT, ctx->encrypt ?
                    PK11_R_ENCRYPTINIT : PK11_R_DECRYPTINIT, rv);
                pk11_return_session(sp, OP_CIPHER);
                return (0);
                }

        return (1);
        }

/* ARGSUSED */
static int
pk11_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
    const unsigned char *iv, int enc)
        {
        CK_MECHANISM mech;
        int index;
        PK11_CIPHER_STATE *state = (PK11_CIPHER_STATE *) ctx->cipher_data;
        PK11_SESSION *sp;
        PK11_CIPHER *p_ciph_table_row;

        state->sp = NULL;

        index = cipher_nid_to_pk11(ctx->cipher->nid);
        if (index < 0 || index >= PK11_CIPHER_MAX)
                return (0);

        p_ciph_table_row = &ciphers[index];
        /*
         * iv_len in the ctx->cipher structure is the maximum IV length for the
         * current cipher and it must be less or equal to the IV length in our
         * ciphers table. The key length must be in the allowed interval. From
         * all cipher modes that the PKCS#11 engine supports only RC4 allows a
         * key length to be in some range, all other NIDs have a precise key
         * length. Every application can define its own EVP functions so this
         * code serves as a sanity check.
         *
         * Note that the reason why the IV length in ctx->cipher might be
         * greater than the actual length is that OpenSSL uses BLOCK_CIPHER_defs
         * macro to define functions that return EVP structures for all DES
         * modes. So, even ECB modes get 8 byte IV.
         */
        if (ctx->cipher->iv_len < p_ciph_table_row->iv_len ||
            ctx->key_len < p_ciph_table_row->min_key_len ||
            ctx->key_len > p_ciph_table_row->max_key_len) {
                PK11err(PK11_F_CIPHER_INIT, PK11_R_KEY_OR_IV_LEN_PROBLEM);
                return (0);
        }

        if ((sp = pk11_get_session(OP_CIPHER)) == NULL)
                return (0);

        /* if applicable, the mechanism parameter is used for IV */
        mech.mechanism = p_ciph_table_row->mech_type;
        mech.pParameter = NULL;
        mech.ulParameterLen = 0;

        /* The key object is destroyed here if it is not the current key. */
        (void) check_new_cipher_key(sp, key, ctx->key_len);

        /*
         * If the key is the same and the encryption is also the same, then
         * just reuse it. However, we must not forget to reinitialize the
         * context that was finalized in pk11_cipher_cleanup().
         */
        if (sp->opdata_cipher_key != CK_INVALID_HANDLE &&
            sp->opdata_encrypt == ctx->encrypt)
                {
                state->sp = sp;
                if (pk11_init_symmetric(ctx, p_ciph_table_row, sp, &mech) == 0)
                        return (0);

                return (1);
                }

        /*
         * Check if the key has been invalidated. If so, a new key object
         * needs to be created.
         */
        if (sp->opdata_cipher_key == CK_INVALID_HANDLE)
                {
                sp->opdata_cipher_key = pk11_get_cipher_key(
                        ctx, key, p_ciph_table_row->key_type, sp);
                }

        if (sp->opdata_encrypt != ctx->encrypt && sp->opdata_encrypt != -1)
                {
                /*
                 * The previous encryption/decryption is different. Need to
                 * terminate the previous * active encryption/decryption here.
                 */
                if (!pk11_cipher_final(sp))
                        {
                        pk11_return_session(sp, OP_CIPHER);
                        return (0);
                        }
                }

        if (sp->opdata_cipher_key == CK_INVALID_HANDLE)
                {
                pk11_return_session(sp, OP_CIPHER);
                return (0);
                }

        /* now initialize the context with a new key */
        if (pk11_init_symmetric(ctx, p_ciph_table_row, sp, &mech) == 0)
                return (0);

        sp->opdata_encrypt = ctx->encrypt;
        state->sp = sp;

        return (1);
        }

/*
 * When reusing the same key in an encryption/decryption session for a
 * decryption/encryption session, we need to close the active session
 * and recreate a new one. Note that the key is in the global session so
 * that it needs not be recreated.
 *
 * It is more appropriate to use C_En/DecryptFinish here. At the time of this
 * development, these two functions in the PKCS#11 libraries used return
 * unexpected errors when passing in 0 length output. It may be a good
 * idea to try them again if performance is a problem here and fix
 * C_En/DecryptFinial if there are bugs there causing the problem.
 */
static int
pk11_cipher_final(PK11_SESSION *sp)
        {
        CK_RV rv;

        rv = pFuncList->C_CloseSession(sp->session);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_CIPHER_FINAL, PK11_R_CLOSESESSION, rv);
                return (0);
                }

        rv = pFuncList->C_OpenSession(SLOTID, CKF_SERIAL_SESSION,
                NULL_PTR, NULL_PTR, &sp->session);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_CIPHER_FINAL, PK11_R_OPENSESSION, rv);
                return (0);
                }

        return (1);
        }

/*
 * An engine interface function. The calling function allocates sufficient
 * memory for the output buffer "out" to hold the results.
 */
static int
pk11_cipher_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
        const unsigned char *in, unsigned int inl)
        {
        PK11_CIPHER_STATE *state = (PK11_CIPHER_STATE *) ctx->cipher_data;
        PK11_SESSION *sp;
        CK_RV rv;
        unsigned long outl = inl;

        if (state == NULL || state->sp == NULL)
                return (0);

        sp = (PK11_SESSION *) state->sp;

        if (!inl)
                return (1);

        /* RC4 is the only stream cipher we support */
        if (ctx->cipher->nid != NID_rc4 && (inl % ctx->cipher->block_size) != 0)
                return (0);

        if (ctx->encrypt)
                {
                rv = pFuncList->C_EncryptUpdate(sp->session,
                        (unsigned char *)in, inl, out, &outl);

                if (rv != CKR_OK)
                        {
                        PK11err_add_data(PK11_F_CIPHER_DO_CIPHER,
                            PK11_R_ENCRYPTUPDATE, rv);
                        return (0);
                        }
                }
        else
                {
                rv = pFuncList->C_DecryptUpdate(sp->session,
                        (unsigned char *)in, inl, out, &outl);

                if (rv != CKR_OK)
                        {
                        PK11err_add_data(PK11_F_CIPHER_DO_CIPHER,
                            PK11_R_DECRYPTUPDATE, rv);
                        return (0);
                        }
                }

        /*
         * For DES_CBC, DES3_CBC, AES_CBC, and RC4, the output size is always
         * the same size of input.
         * The application has guaranteed to call the block ciphers with
         * correctly aligned buffers.
         */
        if (inl != outl)
                return (0);

        return (1);
        }

/*
 * Return the session to the pool. Calling C_EncryptFinal() and C_DecryptFinal()
 * here is the right thing because in EVP_DecryptFinal_ex(), engine's
 * do_cipher() is not even called, and in EVP_EncryptFinal_ex() it is called but
 * the engine can't find out that it's the finalizing call. We wouldn't
 * necessarily have to finalize the context here since reinitializing it with
 * C_(Encrypt|Decrypt)Init() should be fine but for the sake of correctness,
 * let's do it. Some implementations might leak memory if the previously used
 * context is initialized without finalizing it first.
 */
static int
pk11_cipher_cleanup(EVP_CIPHER_CTX *ctx)
        {
        CK_RV rv;
        CK_ULONG len = EVP_MAX_BLOCK_LENGTH;
        CK_BYTE buf[EVP_MAX_BLOCK_LENGTH];
        PK11_CIPHER_STATE *state = ctx->cipher_data;

        if (state != NULL && state->sp != NULL)
                {
                /*
                 * We are not interested in the data here, we just need to get
                 * rid of the context.
                 */
                if (ctx->encrypt)
                        rv = pFuncList->C_EncryptFinal(
                            state->sp->session, buf, &len);
                else
                        rv = pFuncList->C_DecryptFinal(
                            state->sp->session, buf, &len);

                if (rv != CKR_OK)
                        {
                        PK11err_add_data(PK11_F_CIPHER_CLEANUP, ctx->encrypt ?
                            PK11_R_ENCRYPTFINAL : PK11_R_DECRYPTFINAL, rv);
                        pk11_return_session(state->sp, OP_CIPHER);
                        return (0);
                        }

                pk11_return_session(state->sp, OP_CIPHER);
                state->sp = NULL;
                }

        return (1);
        }

/*
 * Registered by the ENGINE when used to find out how to deal with
 * a particular NID in the ENGINE. This says what we'll do at the
 * top level - note, that list is restricted by what we answer with
 */
/* ARGSUSED */
static int
pk11_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
        const int **nids, int nid)
        {
        if (!cipher)
                return (pk11_usable_ciphers(nids));

        switch (nid)
                {
                case NID_des_ede3_cbc:
                        *cipher = &pk11_3des_cbc;
                        break;
                case NID_des_cbc:
                        *cipher = &pk11_des_cbc;
                        break;
                case NID_des_ede3_ecb:
                        *cipher = &pk11_3des_ecb;
                        break;
                case NID_des_ecb:
                        *cipher = &pk11_des_ecb;
                        break;
                case NID_aes_128_cbc:
                        *cipher = &pk11_aes_128_cbc;
                        break;
                case NID_aes_192_cbc:
                        *cipher = &pk11_aes_192_cbc;
                        break;
                case NID_aes_256_cbc:
                        *cipher = &pk11_aes_256_cbc;
                        break;
                case NID_aes_128_ecb:
                        *cipher = &pk11_aes_128_ecb;
                        break;
                case NID_aes_192_ecb:
                        *cipher = &pk11_aes_192_ecb;
                        break;
                case NID_aes_256_ecb:
                        *cipher = &pk11_aes_256_ecb;
                        break;
                case NID_bf_cbc:
                        *cipher = &pk11_bf_cbc;
                        break;
                case NID_rc4:
                        *cipher = &pk11_rc4;
                        break;
                default:
#ifdef  SOLARIS_AES_CTR
                        /*
                         * These can't be in separated cases because the NIDs
                         * here are not constants.
                         */
                        if (nid == NID_aes_128_ctr)
                                *cipher = &pk11_aes_128_ctr;
                        else if (nid == NID_aes_192_ctr)
                                *cipher = &pk11_aes_192_ctr;
                        else if (nid == NID_aes_256_ctr)
                                *cipher = &pk11_aes_256_ctr;
                        else
#endif  /* SOLARIS_AES_CTR */
                        *cipher = NULL;
                        break;
                }
        return (*cipher != NULL);
        }

/* ARGSUSED */
static int
pk11_engine_digests(ENGINE *e, const EVP_MD **digest,
        const int **nids, int nid)
        {
        if (!digest)
                return (pk11_usable_digests(nids));

        switch (nid)
                {
                case NID_md5:
                        *digest = &pk11_md5;
                        break;
                case NID_sha1:
                        *digest = &pk11_sha1;
                        break;
                case NID_sha224:
                        *digest = &pk11_sha224;
                        break;
                case NID_sha256:
                        *digest = &pk11_sha256;
                        break;
                case NID_sha384:
                        *digest = &pk11_sha384;
                        break;
                case NID_sha512:
                        *digest = &pk11_sha512;
                        break;
                default:
                        *digest = NULL;
                        break;
                }
        return (*digest != NULL);
        }


/* Create a secret key object in a PKCS#11 session */
static CK_OBJECT_HANDLE pk11_get_cipher_key(EVP_CIPHER_CTX *ctx,
        const unsigned char *key, CK_KEY_TYPE key_type, PK11_SESSION *sp)
        {
        CK_RV rv;
        CK_OBJECT_HANDLE h_key = CK_INVALID_HANDLE;
        CK_OBJECT_CLASS obj_key = CKO_SECRET_KEY;
        CK_ULONG ul_key_attr_count = 6;

        CK_ATTRIBUTE  a_key_template[] =
                {
                {CKA_CLASS, (void*) NULL, sizeof (CK_OBJECT_CLASS)},
                {CKA_KEY_TYPE, (void*) NULL, sizeof (CK_KEY_TYPE)},
                {CKA_TOKEN, &pk11_false, sizeof (pk11_false)},
                {CKA_ENCRYPT, &pk11_true, sizeof (pk11_true)},
                {CKA_DECRYPT, &pk11_true, sizeof (pk11_true)},
                {CKA_VALUE, (void*) NULL, 0},
                };

        /*
         * Create secret key object in global_session. All other sessions
         * can use the key handles. Here is why:
         * OpenSSL will call EncryptInit and EncryptUpdate using a secret key.
         * It may then call DecryptInit and DecryptUpdate using the same key.
         * To use the same key object, we need to call EncryptFinal with
         * a 0 length message. Currently, this does not work for 3DES
         * mechanism. To get around this problem, we close the session and
         * then create a new session to use the same key object. When a session
         * is closed, all the object handles will be invalid. Thus, create key
         * objects in a global session, an individual session may be closed to
         * terminate the active operation.
         */
        CK_SESSION_HANDLE session = global_session;
        a_key_template[0].pValue = &obj_key;
        a_key_template[1].pValue = &key_type;
        a_key_template[5].pValue = (void *) key;
        a_key_template[5].ulValueLen = (unsigned long) ctx->key_len;

        rv = pFuncList->C_CreateObject(session,
                a_key_template, ul_key_attr_count, &h_key);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_GET_CIPHER_KEY, PK11_R_CREATEOBJECT,
                    rv);
                goto err;
                }

        /*
         * Save the key information used in this session.
         * The max can be saved is PK11_KEY_LEN_MAX.
         */
        sp->opdata_key_len = ctx->key_len > PK11_KEY_LEN_MAX ?
                PK11_KEY_LEN_MAX : ctx->key_len;
        (void) memcpy(sp->opdata_key, key, sp->opdata_key_len);
err:

        return (h_key);
        }

static int
md_nid_to_pk11(int nid)
        {
        int i;

        for (i = 0; i < PK11_DIGEST_MAX; i++)
                if (digests[i].nid == nid)
                        return (digests[i].id);
        return (-1);
        }

static int
pk11_digest_init(EVP_MD_CTX *ctx)
        {
        CK_RV rv;
        CK_MECHANISM mech;
        int index;
        PK11_SESSION *sp;
        PK11_DIGEST *pdp;
        PK11_CIPHER_STATE *state = (PK11_CIPHER_STATE *) ctx->md_data;

        state->sp = NULL;

        index = md_nid_to_pk11(ctx->digest->type);
        if (index < 0 || index >= PK11_DIGEST_MAX)
                return (0);

        pdp = &digests[index];
        if ((sp = pk11_get_session(OP_DIGEST)) == NULL)
                return (0);

        /* at present, no parameter is needed for supported digests */
        mech.mechanism = pdp->mech_type;
        mech.pParameter = NULL;
        mech.ulParameterLen = 0;

        rv = pFuncList->C_DigestInit(sp->session, &mech);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_INIT, PK11_R_DIGESTINIT, rv);
                pk11_return_session(sp, OP_DIGEST);
                return (0);
                }

        state->sp = sp;

        return (1);
        }

static int
pk11_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
        {
        CK_RV rv;
        PK11_CIPHER_STATE *state = (PK11_CIPHER_STATE *) ctx->md_data;

        /* 0 length message will cause a failure in C_DigestFinal */
        if (count == 0)
                return (1);

        if (state == NULL || state->sp == NULL)
                return (0);

        rv = pFuncList->C_DigestUpdate(state->sp->session, (CK_BYTE *) data,
                count);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_UPDATE, PK11_R_DIGESTUPDATE, rv);
                pk11_return_session(state->sp, OP_DIGEST);
                state->sp = NULL;
                return (0);
                }

        return (1);
        }

static int
pk11_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
        {
        CK_RV rv;
        unsigned long len;
        PK11_CIPHER_STATE *state = (PK11_CIPHER_STATE *) ctx->md_data;
        len = ctx->digest->md_size;

        if (state == NULL || state->sp == NULL)
                return (0);

        rv = pFuncList->C_DigestFinal(state->sp->session, md, &len);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_FINAL, PK11_R_DIGESTFINAL, rv);
                pk11_return_session(state->sp, OP_DIGEST);
                state->sp = NULL;
                return (0);
                }

        if (ctx->digest->md_size != len)
                return (0);

        /*
         * Final is called and digest is returned, so return the session
         * to the pool
         */
        pk11_return_session(state->sp, OP_DIGEST);
        state->sp = NULL;

        return (1);
        }

static int
pk11_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
        {
        CK_RV rv;
        int ret = 0;
        PK11_CIPHER_STATE *state, *state_to;
        CK_BYTE_PTR pstate = NULL;
        CK_ULONG ul_state_len;

        /* The copy-from state */
        state = (PK11_CIPHER_STATE *) from->md_data;
        if (state == NULL || state->sp == NULL)
                goto err;

        /* Initialize the copy-to state */
        if (!pk11_digest_init(to))
                goto err;
        state_to = (PK11_CIPHER_STATE *) to->md_data;

        /* Get the size of the operation state of the copy-from session */
        rv = pFuncList->C_GetOperationState(state->sp->session, NULL,
                &ul_state_len);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_COPY, PK11_R_GET_OPERATION_STATE,
                    rv);
                goto err;
                }
        if (ul_state_len == 0)
                {
                goto err;
                }

        pstate = OPENSSL_malloc(ul_state_len);
        if (pstate == NULL)
                {
                PK11err(PK11_F_DIGEST_COPY, PK11_R_MALLOC_FAILURE);
                goto err;
                }

        /* Get the operation state of the copy-from session */
        rv = pFuncList->C_GetOperationState(state->sp->session, pstate,
                &ul_state_len);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_COPY, PK11_R_GET_OPERATION_STATE,
                    rv);
                goto err;
                }

        /* Set the operation state of the copy-to session */
        rv = pFuncList->C_SetOperationState(state_to->sp->session, pstate,
                ul_state_len, 0, 0);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_DIGEST_COPY,
                    PK11_R_SET_OPERATION_STATE, rv);
                goto err;
                }

        ret = 1;
err:
        if (pstate != NULL)
                OPENSSL_free(pstate);

        return (ret);
        }

/* Return any pending session state to the pool */
static int
pk11_digest_cleanup(EVP_MD_CTX *ctx)
        {
        PK11_CIPHER_STATE *state = ctx->md_data;
        unsigned char buf[EVP_MAX_MD_SIZE];

        if (state != NULL && state->sp != NULL)
                {
                /*
                 * If state->sp is not NULL then pk11_digest_final() has not
                 * been called yet. We must call it now to free any memory
                 * that might have been allocated in the token when
                 * pk11_digest_init() was called. pk11_digest_final()
                 * will return the session to the cache.
                 */
                if (!pk11_digest_final(ctx, buf))
                        return (0);
                }

        return (1);
        }

/*
 * Check if the new key is the same as the key object in the session. If the key
 * is the same, no need to create a new key object. Otherwise, the old key
 * object needs to be destroyed and a new one will be created. Return 1 for
 * cache hit, 0 for cache miss. Note that we must check the key length first
 * otherwise we could end up reusing a different, longer key with the same
 * prefix.
 */
static int check_new_cipher_key(PK11_SESSION *sp, const unsigned char *key,
        int key_len)
        {
        if (sp->opdata_key_len != key_len ||
            memcmp(sp->opdata_key, key, key_len) != 0)
                {
                (void) pk11_destroy_cipher_key_objects(sp);
                return (0);
                }
        return (1);
        }

/* Destroy one or more secret key objects. */
static int pk11_destroy_cipher_key_objects(PK11_SESSION *session)
        {
        int ret = 0;
        PK11_SESSION *sp = NULL;
        PK11_SESSION *local_free_session;

        if (session != NULL)
                local_free_session = session;
        else
                {
                (void) pthread_mutex_lock(session_cache[OP_CIPHER].lock);
                local_free_session = session_cache[OP_CIPHER].head;
                }

        while ((sp = local_free_session) != NULL)
                {
                local_free_session = sp->next;

                if (sp->opdata_cipher_key != CK_INVALID_HANDLE)
                        {
                        /*
                         * The secret key object is created in the
                         * global_session. See pk11_get_cipher_key().
                         */
                        if (pk11_destroy_object(global_session,
                                sp->opdata_cipher_key, CK_FALSE) == 0)
                                goto err;
                        sp->opdata_cipher_key = CK_INVALID_HANDLE;
                        }
                }
        ret = 1;
err:

        if (session == NULL)
                (void) pthread_mutex_unlock(session_cache[OP_CIPHER].lock);

        return (ret);
        }


/*
 * Public key mechanisms optionally supported
 *
 * CKM_RSA_X_509
 * CKM_RSA_PKCS
 * CKM_DSA
 *
 * The first slot that supports at least one of those mechanisms is chosen as a
 * public key slot.
 *
 * Symmetric ciphers optionally supported
 *
 * CKM_DES3_CBC
 * CKM_DES_CBC
 * CKM_AES_CBC
 * CKM_DES3_ECB
 * CKM_DES_ECB
 * CKM_AES_ECB
 * CKM_AES_CTR
 * CKM_RC4
 * CKM_BLOWFISH_CBC
 *
 * Digests optionally supported
 *
 * CKM_MD5
 * CKM_SHA_1
 * CKM_SHA224
 * CKM_SHA256
 * CKM_SHA384
 * CKM_SHA512
 *
 * The output of this function is a set of global variables indicating which
 * mechanisms from RSA, DSA, DH and RAND are present, and also two arrays of
 * mechanisms, one for symmetric ciphers and one for digests. Also, 3 global
 * variables carry information about which slot was chosen for (a) public key
 * mechanisms, (b) random operations, and (c) symmetric ciphers and digests.
 */
static int
pk11_choose_slots(int *any_slot_found)
        {
        CK_SLOT_ID_PTR pSlotList = NULL_PTR;
        CK_ULONG ulSlotCount = 0;
        CK_MECHANISM_INFO mech_info;
        CK_TOKEN_INFO token_info;
        int i;
        CK_RV rv;
        CK_SLOT_ID best_slot_sofar;
        CK_BBOOL found_candidate_slot = CK_FALSE;
        int slot_n_cipher = 0;
        int slot_n_digest = 0;
        CK_SLOT_ID current_slot = 0;
        int current_slot_n_cipher = 0;
        int current_slot_n_digest = 0;

        int local_cipher_nids[PK11_CIPHER_MAX];
        int local_digest_nids[PK11_DIGEST_MAX];

        /* let's initialize the output parameter */
        if (any_slot_found != NULL)
                *any_slot_found = 0;

        /* Get slot list for memory allocation */
        rv = pFuncList->C_GetSlotList(CK_FALSE, NULL_PTR, &ulSlotCount);

        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_CHOOSE_SLOT, PK11_R_GETSLOTLIST, rv);
                return (0);
                }

        /* it's not an error if we didn't find any providers */
        if (ulSlotCount == 0)
                {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: no crypto providers found\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                return (1);
                }

        pSlotList = OPENSSL_malloc(ulSlotCount * sizeof (CK_SLOT_ID));

        if (pSlotList == NULL)
                {
                PK11err(PK11_F_CHOOSE_SLOT, PK11_R_MALLOC_FAILURE);
                return (0);
                }

        /* Get the slot list for processing */
        rv = pFuncList->C_GetSlotList(CK_FALSE, pSlotList, &ulSlotCount);
        if (rv != CKR_OK)
                {
                PK11err_add_data(PK11_F_CHOOSE_SLOT, PK11_R_GETSLOTLIST, rv);
                OPENSSL_free(pSlotList);
                return (0);
                }

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: provider: %s\n", PK11_DBG, def_PK11_LIBNAME);
        fprintf(stderr, "%s: number of slots: %d\n", PK11_DBG, ulSlotCount);

        fprintf(stderr, "%s: == checking rand slots ==\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
        for (i = 0; i < ulSlotCount; i++)
                {
                current_slot = pSlotList[i];

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: checking slot: %d\n", PK11_DBG, i);
#endif  /* DEBUG_SLOT_SELECTION */
                /* Check if slot has random support. */
                rv = pFuncList->C_GetTokenInfo(current_slot, &token_info);
                if (rv != CKR_OK)
                        continue;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: token label: %.32s\n", PK11_DBG, token_info.label);
#endif  /* DEBUG_SLOT_SELECTION */

                if (token_info.flags & CKF_RNG)
                        {
#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: this token has CKF_RNG flag\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
                        pk11_have_random = CK_TRUE;
                        rand_SLOTID = current_slot;
                        break;
                        }
                }

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: == checking pubkey slots ==\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */

        pubkey_SLOTID = pSlotList[0];
        for (i = 0; i < ulSlotCount; i++)
                {
                CK_BBOOL slot_has_rsa = CK_FALSE;
                CK_BBOOL slot_has_dsa = CK_FALSE;
                CK_BBOOL slot_has_dh = CK_FALSE;
                current_slot = pSlotList[i];

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: checking slot: %d\n", PK11_DBG, i);
#endif  /* DEBUG_SLOT_SELECTION */
                rv = pFuncList->C_GetTokenInfo(current_slot, &token_info);
                if (rv != CKR_OK)
                        continue;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: token label: %.32s\n", PK11_DBG, token_info.label);
#endif  /* DEBUG_SLOT_SELECTION */

#ifndef OPENSSL_NO_RSA
                /*
                 * Check if this slot is capable of signing and
                 * verifying with CKM_RSA_PKCS.
                 */
                rv = pFuncList->C_GetMechanismInfo(current_slot, CKM_RSA_PKCS,
                        &mech_info);

                if (rv == CKR_OK && ((mech_info.flags & CKF_SIGN) &&
                                (mech_info.flags & CKF_VERIFY)))
                        {
                        /*
                         * Check if this slot is capable of encryption,
                         * decryption, sign, and verify with CKM_RSA_X_509.
                         */
                        rv = pFuncList->C_GetMechanismInfo(current_slot,
                            CKM_RSA_X_509, &mech_info);

                        if (rv == CKR_OK && ((mech_info.flags & CKF_SIGN) &&
                            (mech_info.flags & CKF_VERIFY) &&
                            (mech_info.flags & CKF_ENCRYPT) &&
                            (mech_info.flags & CKF_VERIFY_RECOVER) &&
                            (mech_info.flags & CKF_DECRYPT)))
                                {
                                slot_has_rsa = CK_TRUE;
                                }
                        }
#endif  /* OPENSSL_NO_RSA */

#ifndef OPENSSL_NO_DSA
                /*
                 * Check if this slot is capable of signing and
                 * verifying with CKM_DSA.
                 */
                rv = pFuncList->C_GetMechanismInfo(current_slot, CKM_DSA,
                        &mech_info);
                if (rv == CKR_OK && ((mech_info.flags & CKF_SIGN) &&
                    (mech_info.flags & CKF_VERIFY)))
                        {
                        slot_has_dsa = CK_TRUE;
                        }

#endif  /* OPENSSL_NO_DSA */

#ifndef OPENSSL_NO_DH
                /*
                 * Check if this slot is capable of DH key generataion and
                 * derivation.
                 */
                rv = pFuncList->C_GetMechanismInfo(current_slot,
                    CKM_DH_PKCS_KEY_PAIR_GEN, &mech_info);

                if (rv == CKR_OK && (mech_info.flags & CKF_GENERATE_KEY_PAIR))
                        {
                        rv = pFuncList->C_GetMechanismInfo(current_slot,
                                CKM_DH_PKCS_DERIVE, &mech_info);
                        if (rv == CKR_OK && (mech_info.flags & CKF_DERIVE))
                                {
                                slot_has_dh = CK_TRUE;
                                }
                        }
#endif  /* OPENSSL_NO_DH */

                if (!found_candidate_slot &&
                    (slot_has_rsa || slot_has_dsa || slot_has_dh))
                        {
#ifdef  DEBUG_SLOT_SELECTION
                        fprintf(stderr,
                            "%s: potential slot: %d\n", PK11_DBG, current_slot);
#endif  /* DEBUG_SLOT_SELECTION */
                        best_slot_sofar = current_slot;
                        pk11_have_rsa = slot_has_rsa;
                        pk11_have_dsa = slot_has_dsa;
                        pk11_have_dh = slot_has_dh;
                        found_candidate_slot = CK_TRUE;
                        /*
                         * Cache the flags for later use. We might need those if
                         * RSA keys by reference feature is used.
                         */
                        pubkey_token_flags = token_info.flags;
#ifdef  DEBUG_SLOT_SELECTION
                        fprintf(stderr,
                            "%s: setting found_candidate_slot to CK_TRUE\n",
                            PK11_DBG);
                        fprintf(stderr,
                            "%s: best so far slot: %d\n", PK11_DBG,
                            best_slot_sofar);
                        fprintf(stderr, "%s: pubkey flags changed to "
                            "%lu.\n", PK11_DBG, pubkey_token_flags);
                        }
                else
                        {
                        fprintf(stderr,
                            "%s: no rsa/dsa/dh\n", PK11_DBG);
                        }
#else
                        } /* if */
#endif  /* DEBUG_SLOT_SELECTION */
                } /* for */

        if (found_candidate_slot == CK_TRUE)
                {
                pubkey_SLOTID = best_slot_sofar;
                }

        found_candidate_slot = CK_FALSE;
        best_slot_sofar = 0;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: == checking cipher/digest ==\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */

        SLOTID = pSlotList[0];
        for (i = 0; i < ulSlotCount; i++)
                {
#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: checking slot: %d\n", PK11_DBG, i);
#endif  /* DEBUG_SLOT_SELECTION */

                current_slot = pSlotList[i];
                current_slot_n_cipher = 0;
                current_slot_n_digest = 0;
                (void) memset(local_cipher_nids, 0, sizeof (local_cipher_nids));
                (void) memset(local_digest_nids, 0, sizeof (local_digest_nids));

                pk11_find_symmetric_ciphers(pFuncList, current_slot,
                    &current_slot_n_cipher, local_cipher_nids);

                pk11_find_digests(pFuncList, current_slot,
                    &current_slot_n_digest, local_digest_nids);

#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, "%s: current_slot_n_cipher %d\n", PK11_DBG,
                        current_slot_n_cipher);
                fprintf(stderr, "%s: current_slot_n_digest %d\n", PK11_DBG,
                        current_slot_n_digest);
                fprintf(stderr, "%s: best so far cipher/digest slot: %d\n",
                        PK11_DBG, best_slot_sofar);
#endif  /* DEBUG_SLOT_SELECTION */

                /*
                 * If the current slot supports more ciphers/digests than
                 * the previous best one we change the current best to this one,
                 * otherwise leave it where it is.
                 */
                if ((current_slot_n_cipher + current_slot_n_digest) >
                    (slot_n_cipher + slot_n_digest))
                        {
#ifdef  DEBUG_SLOT_SELECTION
                        fprintf(stderr,
                                "%s: changing best so far slot to %d\n",
                                PK11_DBG, current_slot);
#endif  /* DEBUG_SLOT_SELECTION */
                        best_slot_sofar = SLOTID = current_slot;
                        cipher_count = slot_n_cipher = current_slot_n_cipher;
                        digest_count = slot_n_digest = current_slot_n_digest;
                        (void) memcpy(cipher_nids, local_cipher_nids,
                            sizeof (local_cipher_nids));
                        (void) memcpy(digest_nids, local_digest_nids,
                            sizeof (local_digest_nids));
                        }
                }

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr,
            "%s: chosen pubkey slot: %d\n", PK11_DBG, pubkey_SLOTID);
        fprintf(stderr,
            "%s: chosen rand slot: %d\n", PK11_DBG, rand_SLOTID);
        fprintf(stderr,
            "%s: chosen cipher/digest slot: %d\n", PK11_DBG, SLOTID);
        fprintf(stderr,
            "%s: pk11_have_rsa %d\n", PK11_DBG, pk11_have_rsa);
        fprintf(stderr,
            "%s: pk11_have_dsa %d\n", PK11_DBG, pk11_have_dsa);
        fprintf(stderr,
            "%s: pk11_have_dh %d\n", PK11_DBG, pk11_have_dh);
        fprintf(stderr,
            "%s: pk11_have_random %d\n", PK11_DBG, pk11_have_random);
        fprintf(stderr,
            "%s: cipher_count %d\n", PK11_DBG, cipher_count);
        fprintf(stderr,
            "%s: digest_count %d\n", PK11_DBG, digest_count);
#endif  /* DEBUG_SLOT_SELECTION */

        if (pSlotList != NULL)
                OPENSSL_free(pSlotList);

#ifdef  SOLARIS_HW_SLOT_SELECTION
        OPENSSL_free(hw_cnids);
        OPENSSL_free(hw_dnids);
#endif  /* SOLARIS_HW_SLOT_SELECTION */

        if (any_slot_found != NULL)
                *any_slot_found = 1;
        return (1);
        }

static void pk11_get_symmetric_cipher(CK_FUNCTION_LIST_PTR pflist,
    int slot_id, CK_MECHANISM_TYPE mech, int *current_slot_n_cipher,
    int *local_cipher_nids, int id)
        {
        CK_MECHANISM_INFO mech_info;
        CK_RV rv;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: checking mech: %x", PK11_DBG, mech);
#endif  /* DEBUG_SLOT_SELECTION */
        rv = pflist->C_GetMechanismInfo(slot_id, mech, &mech_info);

        if (rv != CKR_OK)
                {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, " not found\n");
#endif  /* DEBUG_SLOT_SELECTION */
                return;
                }

        if ((mech_info.flags & CKF_ENCRYPT) &&
            (mech_info.flags & CKF_DECRYPT))
                {
#ifdef  SOLARIS_HW_SLOT_SELECTION
                if (nid_in_table(ciphers[id].nid, hw_cnids))
#endif  /* SOLARIS_HW_SLOT_SELECTION */
                        {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, " usable\n");
#endif  /* DEBUG_SLOT_SELECTION */
                        local_cipher_nids[(*current_slot_n_cipher)++] =
                            ciphers[id].nid;
                        }
#ifdef  SOLARIS_HW_SLOT_SELECTION
#ifdef  DEBUG_SLOT_SELECTION
                else
                        {
                fprintf(stderr, " rejected, software implementation only\n");
                        }
#endif  /* DEBUG_SLOT_SELECTION */
#endif  /* SOLARIS_HW_SLOT_SELECTION */
                }
#ifdef  DEBUG_SLOT_SELECTION
        else
                {
                fprintf(stderr, " unusable\n");
                }
#endif  /* DEBUG_SLOT_SELECTION */

        return;
        }

static void pk11_get_digest(CK_FUNCTION_LIST_PTR pflist, int slot_id,
    CK_MECHANISM_TYPE mech, int *current_slot_n_digest, int *local_digest_nids,
    int id)
        {
        CK_MECHANISM_INFO mech_info;
        CK_RV rv;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: checking mech: %x", PK11_DBG, mech);
#endif  /* DEBUG_SLOT_SELECTION */
        rv = pflist->C_GetMechanismInfo(slot_id, mech, &mech_info);

        if (rv != CKR_OK)
                {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, " not found\n");
#endif  /* DEBUG_SLOT_SELECTION */
                return;
                }

        if (mech_info.flags & CKF_DIGEST)
                {
#ifdef  SOLARIS_HW_SLOT_SELECTION
                if (nid_in_table(digests[id].nid, hw_dnids))
#endif  /* SOLARIS_HW_SLOT_SELECTION */
                        {
#ifdef  DEBUG_SLOT_SELECTION
                fprintf(stderr, " usable\n");
#endif  /* DEBUG_SLOT_SELECTION */
                        local_digest_nids[(*current_slot_n_digest)++] =
                            digests[id].nid;
                        }
#ifdef  SOLARIS_HW_SLOT_SELECTION
#ifdef  DEBUG_SLOT_SELECTION
                else
                        {
                fprintf(stderr, " rejected, software implementation only\n");
                        }
#endif  /* DEBUG_SLOT_SELECTION */
#endif  /* SOLARIS_HW_SLOT_SELECTION */
                }
#ifdef  DEBUG_SLOT_SELECTION
        else
                {
                fprintf(stderr, " unusable\n");
                }
#endif  /* DEBUG_SLOT_SELECTION */

        return;
        }

#ifdef  SOLARIS_AES_CTR
/* create a new NID when we have no OID for that mechanism */
static int pk11_add_NID(char *sn, char *ln)
        {
        ASN1_OBJECT *o;
        int nid;

        if ((o = ASN1_OBJECT_create(OBJ_new_nid(1), (unsigned char *)"",
            1, sn, ln)) == NULL)
                {
                return (0);
                }

        /* will return NID_undef on error */
        nid = OBJ_add_object(o);
        ASN1_OBJECT_free(o);

        return (nid);
        }

/*
 * Create new NIDs for AES counter mode. OpenSSL doesn't support them now so we
 * have to help ourselves here.
 */
static int pk11_add_aes_ctr_NIDs(void)
        {
        /* are we already set? */
        if (NID_aes_256_ctr != NID_undef)
                return (1);

        /*
         * There are no official names for AES counter modes yet so we just
         * follow the format of those that exist.
         */
        if ((NID_aes_128_ctr = pk11_add_NID("AES-128-CTR", "aes-128-ctr")) ==
            NID_undef)
                goto err;
        ciphers[PK11_AES_128_CTR].nid = pk11_aes_128_ctr.nid = NID_aes_128_ctr;
        if ((NID_aes_192_ctr = pk11_add_NID("AES-192-CTR", "aes-192-ctr")) ==
            NID_undef)
                goto err;
        ciphers[PK11_AES_192_CTR].nid = pk11_aes_192_ctr.nid = NID_aes_192_ctr;
        if ((NID_aes_256_ctr = pk11_add_NID("AES-256-CTR", "aes-256-ctr")) ==
            NID_undef)
                goto err;
        ciphers[PK11_AES_256_CTR].nid = pk11_aes_256_ctr.nid = NID_aes_256_ctr;
        return (1);

err:
        PK11err(PK11_F_ADD_AES_CTR_NIDS, PK11_R_ADD_NID_FAILED);
        return (0);
        }
#endif  /* SOLARIS_AES_CTR */

/* Find what symmetric ciphers this slot supports. */
static void pk11_find_symmetric_ciphers(CK_FUNCTION_LIST_PTR pflist,
    CK_SLOT_ID current_slot, int *current_slot_n_cipher, int *local_cipher_nids)
        {
        int i;

        for (i = 0; i < PK11_CIPHER_MAX; ++i)
                {
                pk11_get_symmetric_cipher(pflist, current_slot,
                    ciphers[i].mech_type, current_slot_n_cipher,
                    local_cipher_nids, ciphers[i].id);
                }
        }

/* Find what digest algorithms this slot supports. */
static void pk11_find_digests(CK_FUNCTION_LIST_PTR pflist,
    CK_SLOT_ID current_slot, int *current_slot_n_digest, int *local_digest_nids)
        {
        int i;

        for (i = 0; i < PK11_DIGEST_MAX; ++i)
                {
                pk11_get_digest(pflist, current_slot, digests[i].mech_type,
                    current_slot_n_digest, local_digest_nids, digests[i].id);
                }
        }

#ifdef  SOLARIS_HW_SLOT_SELECTION
/*
 * It would be great if we could use pkcs11_kernel directly since this library
 * offers hardware slots only. That's the easiest way to achieve the situation
 * where we use the hardware accelerators when present and OpenSSL native code
 * otherwise. That presumes the fact that OpenSSL native code is faster than the
 * code in the soft token. It's a logical assumption - Crypto Framework has some
 * inherent overhead so going there for the software implementation of a
 * mechanism should be logically slower in contrast to the OpenSSL native code,
 * presuming that both implementations are of similar speed. For example, the
 * soft token for AES is roughly three times slower than OpenSSL for 64 byte
 * blocks and still 20% slower for 8KB blocks. So, if we want to ship products
 * that use the PKCS#11 engine by default, we must somehow avoid that regression
 * on machines without hardware acceleration. That's why switching to the
 * pkcs11_kernel library seems like a very good idea.
 *
 * The problem is that OpenSSL built with SunStudio is roughly 2x slower for
 * asymmetric operations (RSA/DSA/DH) than the soft token built with the same
 * compiler. That means that if we switched to pkcs11_kernel from the libpkcs11
 * library, we would have had a performance regression on machines without
 * hardware acceleration for asymmetric operations for all applications that use
 * the PKCS#11 engine. There is one such application - Apache web server since
 * it's shipped configured to use the PKCS#11 engine by default. Having said
 * that, we can't switch to the pkcs11_kernel library now and have to come with
 * a solution that, on non-accelerated machines, uses the OpenSSL native code
 * for all symmetric ciphers and digests while it uses the soft token for
 * asymmetric operations.
 *
 * This is the idea: dlopen() pkcs11_kernel directly and find out what
 * mechanisms are there. We don't care about duplications (more slots can
 * support the same mechanism), we just want to know what mechanisms can be
 * possibly supported in hardware on that particular machine. As said before,
 * pkcs11_kernel will show you hardware providers only.
 *
 * Then, we rely on the fact that since we use libpkcs11 library we will find
 * the metaslot. When we go through the metaslot's mechanisms for symmetric
 * ciphers and digests, we check that any found mechanism is in the table
 * created using the pkcs11_kernel library. So, as a result we have two arrays
 * of mechanisms that were advertised as supported in hardware which was the
 * goal of that whole excercise. Thus, we can use libpkcs11 but avoid soft token
 * code for symmetric ciphers and digests. See pk11_choose_slots() for more
 * information.
 *
 * This is Solaris specific code, if SOLARIS_HW_SLOT_SELECTION is not defined
 * the code won't be used.
 */
#if defined(__sparcv9) || defined(__x86_64) || defined(__amd64)
static const char pkcs11_kernel[] = "/usr/lib/security/64/pkcs11_kernel.so.1";
#else
static const char pkcs11_kernel[] = "/usr/lib/security/pkcs11_kernel.so.1";
#endif

/*
 * Check hardware capabilities of the machines. The output are two lists,
 * hw_cnids and hw_dnids, that contain hardware mechanisms found in all hardware
 * providers together. They are not sorted and may contain duplicate mechanisms.
 */
static int check_hw_mechanisms(void)
        {
        int i;
        CK_RV rv;
        void *handle;
        CK_C_GetFunctionList p;
        CK_TOKEN_INFO token_info;
        CK_ULONG ulSlotCount = 0;
        int n_cipher = 0, n_digest = 0;
        CK_FUNCTION_LIST_PTR pflist = NULL;
        CK_SLOT_ID_PTR pSlotList = NULL_PTR;
        int *tmp_hw_cnids = NULL, *tmp_hw_dnids = NULL;
        int hw_ctable_size, hw_dtable_size;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: SOLARIS_HW_SLOT_SELECTION code running\n",
            PK11_DBG);
#endif
        /*
         * Use RTLD_GROUP to limit the pkcs11_kernel provider to its own
         * symbols, which prevents it from mistakenly accessing C_* functions
         * from the top-level PKCS#11 library.
         */
        if ((handle = dlopen(pkcs11_kernel, RTLD_LAZY | RTLD_GROUP)) == NULL)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_DSO_FAILURE);
                goto err;
                }

        if ((p = (CK_C_GetFunctionList)dlsym(handle,
            PK11_GET_FUNCTION_LIST)) == NULL)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_DSO_FAILURE);
                goto err;
                }

        /* get the full function list from the loaded library */
        if (p(&pflist) != CKR_OK)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_DSO_FAILURE);
                goto err;
                }

        rv = pflist->C_Initialize(NULL_PTR);
        if ((rv != CKR_OK) && (rv != CKR_CRYPTOKI_ALREADY_INITIALIZED))
                {
                PK11err_add_data(PK11_F_CHECK_HW_MECHANISMS,
                    PK11_R_INITIALIZE, rv);
                goto err;
                }

        if (pflist->C_GetSlotList(0, NULL_PTR, &ulSlotCount) != CKR_OK)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_GETSLOTLIST);
                goto err;
                }

        /* no slots, set the hw mechanism tables as empty */
        if (ulSlotCount == 0)
                {
#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: no hardware mechanisms found\n", PK11_DBG);
#endif
                hw_cnids = OPENSSL_malloc(sizeof (int));
                hw_dnids = OPENSSL_malloc(sizeof (int));
                if (hw_cnids == NULL || hw_dnids == NULL)
                        {
                        PK11err(PK11_F_CHECK_HW_MECHANISMS,
                            PK11_R_MALLOC_FAILURE);
                        return (0);
                        }
                /* this means empty tables */
                hw_cnids[0] = NID_undef;
                hw_dnids[0] = NID_undef;
                return (1);
                }

        pSlotList = OPENSSL_malloc(ulSlotCount * sizeof (CK_SLOT_ID));
        if (pSlotList == NULL)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_MALLOC_FAILURE);
                goto err;
                }

        /* Get the slot list for processing */
        if (pflist->C_GetSlotList(0, pSlotList, &ulSlotCount) != CKR_OK)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_GETSLOTLIST);
                goto err;
                }

        /*
         * We don't care about duplicit mechanisms in multiple slots and also
         * reserve one slot for the terminal NID_undef which we use to stop the
         * search.
         */
        hw_ctable_size = ulSlotCount * PK11_CIPHER_MAX + 1;
        hw_dtable_size = ulSlotCount * PK11_DIGEST_MAX + 1;
        tmp_hw_cnids = OPENSSL_malloc(hw_ctable_size * sizeof (int));
        tmp_hw_dnids = OPENSSL_malloc(hw_dtable_size * sizeof (int));
        if (tmp_hw_cnids == NULL || tmp_hw_dnids == NULL)
                {
                PK11err(PK11_F_CHECK_HW_MECHANISMS, PK11_R_MALLOC_FAILURE);
                goto err;
                }

        /*
         * Do not use memset since we should not rely on the fact that NID_undef
         * is zero now.
         */
        for (i = 0; i < hw_ctable_size; ++i)
                tmp_hw_cnids[i] = NID_undef;
        for (i = 0; i < hw_dtable_size; ++i)
                tmp_hw_dnids[i] = NID_undef;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: provider: %s\n", PK11_DBG, pkcs11_kernel);
        fprintf(stderr, "%s: found %d hardware slots\n", PK11_DBG, ulSlotCount);
        fprintf(stderr, "%s: now looking for mechs supported in hw\n",
            PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */

        for (i = 0; i < ulSlotCount; i++)
                {
                if (pflist->C_GetTokenInfo(pSlotList[i], &token_info) != CKR_OK)
                        continue;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: token label: %.32s\n", PK11_DBG, token_info.label);
#endif  /* DEBUG_SLOT_SELECTION */

                /*
                 * We are filling the hw mech tables here. Global tables are
                 * still NULL so all mechanisms are put into tmp tables.
                 */
                pk11_find_symmetric_ciphers(pflist, pSlotList[i],
                    &n_cipher, tmp_hw_cnids);
                pk11_find_digests(pflist, pSlotList[i],
                    &n_digest, tmp_hw_dnids);
                }

        /*
         * Since we are part of a library (libcrypto.so), calling this function
         * may have side-effects. Also, C_Finalize() is triggered by
         * dlclose(3C).
         */
#if 0
        pflist->C_Finalize(NULL);
#endif
        OPENSSL_free(pSlotList);
        (void) dlclose(handle);
        hw_cnids = tmp_hw_cnids;
        hw_dnids = tmp_hw_dnids;

#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, "%s: hw mechs check complete\n", PK11_DBG);
#endif  /* DEBUG_SLOT_SELECTION */
        return (1);

err:
        if (pSlotList != NULL)
                OPENSSL_free(pSlotList);
        if (tmp_hw_cnids != NULL)
                OPENSSL_free(tmp_hw_cnids);
        if (tmp_hw_dnids != NULL)
                OPENSSL_free(tmp_hw_dnids);

        return (0);
        }

/*
 * Check presence of a NID in the table of NIDs. The table may be NULL (i.e.,
 * non-existent).
 */
static int nid_in_table(int nid, int *nid_table)
        {
        int i = 0;

        /*
         * a special case. NULL means that we are initializing a new
         * table.
         */
        if (nid_table == NULL)
                return (1);

        /*
         * the table is never full, there is always at least one
         * NID_undef.
         */
        while (nid_table[i] != NID_undef)
                {
                if (nid_table[i++] == nid)
                        {
#ifdef  DEBUG_SLOT_SELECTION
        fprintf(stderr, " (NID %d in hw table, idx %d)", nid, i);
#endif  /* DEBUG_SLOT_SELECTION */
                        return (1);
                        }
                }

        return (0);
        }
#endif  /* SOLARIS_HW_SLOT_SELECTION */

#endif  /* OPENSSL_NO_HW_PK11 */
#endif  /* OPENSSL_NO_HW */