1 /* crypto/rsa/rsa_ameth.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/rsa.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_CMS
66 #include <openssl/cms.h>
68 #include "asn1_locl.h"
70 static int rsa_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
72 unsigned char *penc
= NULL
;
74 penclen
= i2d_RSAPublicKey(pkey
->pkey
.rsa
, &penc
);
77 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_RSA
),
78 V_ASN1_NULL
, NULL
, penc
, penclen
))
85 static int rsa_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
87 const unsigned char *p
;
90 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, NULL
, pubkey
))
92 if (!(rsa
= d2i_RSAPublicKey(NULL
, &p
, pklen
)))
94 RSAerr(RSA_F_RSA_PUB_DECODE
, ERR_R_RSA_LIB
);
97 EVP_PKEY_assign_RSA (pkey
, rsa
);
101 static int rsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
103 if (BN_cmp(b
->pkey
.rsa
->n
,a
->pkey
.rsa
->n
) != 0
104 || BN_cmp(b
->pkey
.rsa
->e
,a
->pkey
.rsa
->e
) != 0)
109 static int old_rsa_priv_decode(EVP_PKEY
*pkey
,
110 const unsigned char **pder
, int derlen
)
113 if (!(rsa
= d2i_RSAPrivateKey (NULL
, pder
, derlen
)))
115 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE
, ERR_R_RSA_LIB
);
118 EVP_PKEY_assign_RSA(pkey
, rsa
);
122 static int old_rsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
124 return i2d_RSAPrivateKey(pkey
->pkey
.rsa
, pder
);
127 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
129 unsigned char *rk
= NULL
;
131 rklen
= i2d_RSAPrivateKey(pkey
->pkey
.rsa
, &rk
);
135 RSAerr(RSA_F_RSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
139 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_rsaEncryption
), 0,
140 V_ASN1_NULL
, NULL
, rk
, rklen
))
142 RSAerr(RSA_F_RSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
149 static int rsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
151 const unsigned char *p
;
153 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, NULL
, p8
))
155 return old_rsa_priv_decode(pkey
, &p
, pklen
);
158 static int int_rsa_size(const EVP_PKEY
*pkey
)
160 return RSA_size(pkey
->pkey
.rsa
);
163 static int rsa_bits(const EVP_PKEY
*pkey
)
165 return BN_num_bits(pkey
->pkey
.rsa
->n
);
168 static void int_rsa_free(EVP_PKEY
*pkey
)
170 RSA_free(pkey
->pkey
.rsa
);
174 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
179 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
183 static int do_rsa_print(BIO
*bp
, const RSA
*x
, int off
, int priv
)
187 unsigned char *m
=NULL
;
188 int ret
=0, mod_len
= 0;
191 update_buflen(x
->n
, &buf_len
);
192 update_buflen(x
->e
, &buf_len
);
196 update_buflen(x
->d
, &buf_len
);
197 update_buflen(x
->p
, &buf_len
);
198 update_buflen(x
->q
, &buf_len
);
199 update_buflen(x
->dmp1
, &buf_len
);
200 update_buflen(x
->dmq1
, &buf_len
);
201 update_buflen(x
->iqmp
, &buf_len
);
204 m
=(unsigned char *)OPENSSL_malloc(buf_len
+10);
207 RSAerr(RSA_F_DO_RSA_PRINT
,ERR_R_MALLOC_FAILURE
);
212 mod_len
= BN_num_bits(x
->n
);
214 if(!BIO_indent(bp
,off
,128))
219 if (BIO_printf(bp
,"Private-Key: (%d bit)\n", mod_len
)
222 s
= "publicExponent:";
226 if (BIO_printf(bp
,"Public-Key: (%d bit)\n", mod_len
)
231 if (!ASN1_bn_print(bp
,str
,x
->n
,m
,off
)) goto err
;
232 if (!ASN1_bn_print(bp
,s
,x
->e
,m
,off
))
236 if (!ASN1_bn_print(bp
,"privateExponent:",x
->d
,m
,off
))
238 if (!ASN1_bn_print(bp
,"prime1:",x
->p
,m
,off
))
240 if (!ASN1_bn_print(bp
,"prime2:",x
->q
,m
,off
))
242 if (!ASN1_bn_print(bp
,"exponent1:",x
->dmp1
,m
,off
))
244 if (!ASN1_bn_print(bp
,"exponent2:",x
->dmq1
,m
,off
))
246 if (!ASN1_bn_print(bp
,"coefficient:",x
->iqmp
,m
,off
))
251 if (m
!= NULL
) OPENSSL_free(m
);
255 static int rsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
258 return do_rsa_print(bp
, pkey
->pkey
.rsa
, indent
, 0);
262 static int rsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
265 return do_rsa_print(bp
, pkey
->pkey
.rsa
, indent
, 1);
268 static RSA_PSS_PARAMS
*rsa_pss_decode(const X509_ALGOR
*alg
,
269 X509_ALGOR
**pmaskHash
)
271 const unsigned char *p
;
277 if (!alg
->parameter
|| alg
->parameter
->type
!= V_ASN1_SEQUENCE
)
279 p
= alg
->parameter
->value
.sequence
->data
;
280 plen
= alg
->parameter
->value
.sequence
->length
;
281 pss
= d2i_RSA_PSS_PARAMS(NULL
, &p
, plen
);
286 if (pss
->maskGenAlgorithm
)
288 ASN1_TYPE
*param
= pss
->maskGenAlgorithm
->parameter
;
289 if (OBJ_obj2nid(pss
->maskGenAlgorithm
->algorithm
) == NID_mgf1
290 && param
->type
== V_ASN1_SEQUENCE
)
292 p
= param
->value
.sequence
->data
;
293 plen
= param
->value
.sequence
->length
;
294 *pmaskHash
= d2i_X509_ALGOR(NULL
, &p
, plen
);
301 static int rsa_pss_param_print(BIO
*bp
, RSA_PSS_PARAMS
*pss
,
302 X509_ALGOR
*maskHash
, int indent
)
307 if (BIO_puts(bp
, " (INVALID PSS PARAMETERS)\n") <= 0)
311 if (BIO_puts(bp
, "\n") <= 0)
313 if (!BIO_indent(bp
, indent
, 128))
315 if (BIO_puts(bp
, "Hash Algorithm: ") <= 0)
318 if (pss
->hashAlgorithm
)
320 if (i2a_ASN1_OBJECT(bp
, pss
->hashAlgorithm
->algorithm
) <= 0)
323 else if (BIO_puts(bp
, "sha1 (default)") <= 0)
326 if (BIO_puts(bp
, "\n") <= 0)
329 if (!BIO_indent(bp
, indent
, 128))
332 if (BIO_puts(bp
, "Mask Algorithm: ") <= 0)
334 if (pss
->maskGenAlgorithm
)
336 if (i2a_ASN1_OBJECT(bp
, pss
->maskGenAlgorithm
->algorithm
) <= 0)
338 if (BIO_puts(bp
, " with ") <= 0)
342 if (i2a_ASN1_OBJECT(bp
, maskHash
->algorithm
) <= 0)
345 else if (BIO_puts(bp
, "INVALID") <= 0)
348 else if (BIO_puts(bp
, "mgf1 with sha1 (default)") <= 0)
352 if (!BIO_indent(bp
, indent
, 128))
354 if (BIO_puts(bp
, "Salt Length: 0x") <= 0)
358 if (i2a_ASN1_INTEGER(bp
, pss
->saltLength
) <= 0)
361 else if (BIO_puts(bp
, "14 (default)") <= 0)
365 if (!BIO_indent(bp
, indent
, 128))
367 if (BIO_puts(bp
, "Trailer Field: 0x") <= 0)
369 if (pss
->trailerField
)
371 if (i2a_ASN1_INTEGER(bp
, pss
->trailerField
) <= 0)
374 else if (BIO_puts(bp
, "BC (default)") <= 0)
385 static int rsa_sig_print(BIO
*bp
, const X509_ALGOR
*sigalg
,
386 const ASN1_STRING
*sig
,
387 int indent
, ASN1_PCTX
*pctx
)
389 if (OBJ_obj2nid(sigalg
->algorithm
) == NID_rsassaPss
)
393 X509_ALGOR
*maskHash
;
394 pss
= rsa_pss_decode(sigalg
, &maskHash
);
395 rv
= rsa_pss_param_print(bp
, pss
, maskHash
, indent
);
397 RSA_PSS_PARAMS_free(pss
);
399 X509_ALGOR_free(maskHash
);
403 else if (!sig
&& BIO_puts(bp
, "\n") <= 0)
406 return X509_signature_dump(bp
, sig
, indent
);
410 static int rsa_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
412 X509_ALGOR
*alg
= NULL
;
416 case ASN1_PKEY_CTRL_PKCS7_SIGN
:
418 PKCS7_SIGNER_INFO_get0_algs(arg2
, NULL
, NULL
, &alg
);
421 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT
:
423 PKCS7_RECIP_INFO_get0_alg(arg2
, &alg
);
425 #ifndef OPENSSL_NO_CMS
426 case ASN1_PKEY_CTRL_CMS_SIGN
:
428 CMS_SignerInfo_get0_algs(arg2
, NULL
, NULL
, NULL
, &alg
);
431 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
433 CMS_RecipientInfo_ktri_get0_algs(arg2
, NULL
, NULL
, &alg
);
437 case ASN1_PKEY_CTRL_DEFAULT_MD_NID
:
438 *(int *)arg2
= NID_sha1
;
447 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsaEncryption
),
454 /* Customised RSA item verification routine. This is called
455 * when a signature is encountered requiring special handling. We
456 * currently only handle PSS.
460 static int rsa_item_verify(EVP_MD_CTX
*ctx
, const ASN1_ITEM
*it
, void *asn
,
461 X509_ALGOR
*sigalg
, ASN1_BIT_STRING
*sig
,
466 const EVP_MD
*mgf1md
= NULL
, *md
= NULL
;
468 X509_ALGOR
*maskHash
;
470 /* Sanity check: make sure it is PSS */
471 if (OBJ_obj2nid(sigalg
->algorithm
) != NID_rsassaPss
)
473 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNSUPPORTED_SIGNATURE_TYPE
);
476 /* Decode PSS parameters */
477 pss
= rsa_pss_decode(sigalg
, &maskHash
);
481 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_INVALID_PSS_PARAMETERS
);
484 /* Check mask and lookup mask hash algorithm */
485 if (pss
->maskGenAlgorithm
)
487 if (OBJ_obj2nid(pss
->maskGenAlgorithm
->algorithm
) != NID_mgf1
)
489 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNSUPPORTED_MASK_ALGORITHM
);
494 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNSUPPORTED_MASK_PARAMETER
);
497 mgf1md
= EVP_get_digestbyobj(maskHash
->algorithm
);
500 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNKNOWN_MASK_DIGEST
);
507 if (pss
->hashAlgorithm
)
509 md
= EVP_get_digestbyobj(pss
->hashAlgorithm
->algorithm
);
512 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNKNOWN_PSS_DIGEST
);
521 saltlen
= ASN1_INTEGER_get(pss
->saltLength
);
523 /* Could perform more salt length sanity checks but the main
524 * RSA routines will trap other invalid values anyway.
528 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_INVALID_SALT_LENGTH
);
535 /* low-level routines support only trailer field 0xbc (value 1)
536 * and PKCS#1 says we should reject any other value anyway.
538 if (pss
->trailerField
&& ASN1_INTEGER_get(pss
->trailerField
) != 1)
540 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_INVALID_TRAILER
);
544 /* We have all parameters now set up context */
546 if (!EVP_DigestVerifyInit(ctx
, &pkctx
, md
, NULL
, pkey
))
549 if (EVP_PKEY_CTX_set_rsa_padding(pkctx
, RSA_PKCS1_PSS_PADDING
) <= 0)
552 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx
, saltlen
) <= 0)
555 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx
, mgf1md
) <= 0)
561 RSA_PSS_PARAMS_free(pss
);
563 X509_ALGOR_free(maskHash
);
567 static int rsa_item_sign(EVP_MD_CTX
*ctx
, const ASN1_ITEM
*it
, void *asn
,
568 X509_ALGOR
*alg1
, X509_ALGOR
*alg2
,
569 ASN1_BIT_STRING
*sig
)
572 EVP_PKEY_CTX
*pkctx
= ctx
->pctx
;
573 if (EVP_PKEY_CTX_get_rsa_padding(pkctx
, &pad_mode
) <= 0)
575 if (pad_mode
== RSA_PKCS1_PADDING
)
577 if (pad_mode
== RSA_PKCS1_PSS_PADDING
)
579 const EVP_MD
*sigmd
, *mgf1md
;
580 RSA_PSS_PARAMS
*pss
= NULL
;
581 X509_ALGOR
*mgf1alg
= NULL
;
582 ASN1_STRING
*os1
= NULL
, *os2
= NULL
;
583 EVP_PKEY
*pk
= EVP_PKEY_CTX_get0_pkey(pkctx
);
585 sigmd
= EVP_MD_CTX_md(ctx
);
586 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx
, &mgf1md
) <= 0)
588 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx
, &saltlen
))
591 saltlen
= EVP_MD_size(sigmd
);
592 else if (saltlen
== -2)
594 saltlen
= EVP_PKEY_size(pk
) - EVP_MD_size(sigmd
) - 2;
595 if (((EVP_PKEY_bits(pk
) - 1) & 0x7) == 0)
598 pss
= RSA_PSS_PARAMS_new();
603 pss
->saltLength
= ASN1_INTEGER_new();
604 if (!pss
->saltLength
)
606 if (!ASN1_INTEGER_set(pss
->saltLength
, saltlen
))
609 if (EVP_MD_type(sigmd
) != NID_sha1
)
611 pss
->hashAlgorithm
= X509_ALGOR_new();
612 if (!pss
->hashAlgorithm
)
614 X509_ALGOR_set_md(pss
->hashAlgorithm
, sigmd
);
616 if (EVP_MD_type(mgf1md
) != NID_sha1
)
618 ASN1_STRING
*stmp
= NULL
;
619 /* need to embed algorithm ID inside another */
620 mgf1alg
= X509_ALGOR_new();
621 X509_ALGOR_set_md(mgf1alg
, mgf1md
);
622 if (!ASN1_item_pack(mgf1alg
, ASN1_ITEM_rptr(X509_ALGOR
),
625 pss
->maskGenAlgorithm
= X509_ALGOR_new();
626 if (!pss
->maskGenAlgorithm
)
628 X509_ALGOR_set0(pss
->maskGenAlgorithm
,
629 OBJ_nid2obj(NID_mgf1
),
630 V_ASN1_SEQUENCE
, stmp
);
632 /* Finally create string with pss parameter encoding. */
633 if (!ASN1_item_pack(pss
, ASN1_ITEM_rptr(RSA_PSS_PARAMS
), &os1
))
637 os2
= ASN1_STRING_dup(os1
);
640 X509_ALGOR_set0(alg2
, OBJ_nid2obj(NID_rsassaPss
),
641 V_ASN1_SEQUENCE
, os2
);
643 X509_ALGOR_set0(alg1
, OBJ_nid2obj(NID_rsassaPss
),
644 V_ASN1_SEQUENCE
, os1
);
649 X509_ALGOR_free(mgf1alg
);
651 RSA_PSS_PARAMS_free(pss
);
653 ASN1_STRING_free(os1
);
660 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths
[] =
665 ASN1_PKEY_SIGPARAM_NULL
,
668 "OpenSSL RSA method",