src/crypto/axtls/crypto.h

   1 /*
   2  *  Copyright(C) 2006 Cameron Rich
   3  *
   4  *  This library is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU Lesser General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU Lesser General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Lesser General Public License
  15  *  along with this library; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 /**
  20  * @file crypto.h
  21  */
  22
  23 #ifndef HEADER_CRYPTO_H
  24 #define HEADER_CRYPTO_H
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 #include "bigint.h"
  31
  32 /**************************************************************************
  33  * AES declarations
  34  **************************************************************************/
  35
  36 #define AES_MAXROUNDS                   14
  37
  38 typedef struct aes_key_st
  39 {
  40     uint16_t rounds;
  41     uint16_t key_size;
  42     uint32_t ks[(AES_MAXROUNDS+1)*8];
  43     uint8_t iv[16];
  44 } AES_CTX;
  45
  46 typedef enum
  47 {
  48     AES_MODE_128,
  49     AES_MODE_256
  50 } AES_MODE;
  51
  52 void AES_set_key(AES_CTX *ctx, const uint8_t *key,
  53         const uint8_t *iv, AES_MODE mode);
  54 void AES_cbc_encrypt(AES_CTX *ctx, const uint8_t *msg,
  55         uint8_t *out, int length);
  56 void AES_cbc_decrypt(AES_CTX *ks, const uint8_t *in, uint8_t *out, int length);
  57 void AES_convert_key(AES_CTX *ctx);
  58 void AES_encrypt(const AES_CTX *ctx, uint32_t *data);
  59 void AES_decrypt(const AES_CTX *ctx, uint32_t *data);
  60
  61 /**************************************************************************
  62  * RC4 declarations
  63  **************************************************************************/
  64
  65 typedef struct
  66 {
  67     int x, y, m[256];
  68 } RC4_CTX;
  69
  70 void RC4_setup(RC4_CTX *s, const uint8_t *key, int length);
  71 void RC4_crypt(RC4_CTX *s, const uint8_t *msg, uint8_t *data, int length);
  72
  73 /**************************************************************************
  74  * SHA1 declarations
  75  **************************************************************************/
  76
  77 #define SHA1_SIZE   20
  78
  79 /*
  80  *  This structure will hold context information for the SHA-1
  81  *  hashing operation
  82  */
  83 typedef struct
  84 {
  85     uint32_t Intermediate_Hash[SHA1_SIZE/4]; /* Message Digest  */
  86     uint32_t Length_Low;            /* Message length in bits      */
  87     uint32_t Length_High;           /* Message length in bits      */
  88     uint16_t Message_Block_Index;   /* Index into message block array   */
  89     uint8_t Message_Block[64];      /* 512-bit message blocks      */
  90 } SHA1_CTX;
  91
  92 void SHA1Init(SHA1_CTX *);
  93 void SHA1Update(SHA1_CTX *, const uint8_t * msg, int len);
  94 void SHA1Final(SHA1_CTX *, uint8_t *digest);
  95
  96 /**************************************************************************
  97  * MD5 declarations
  98  **************************************************************************/
  99
 100 /* MD5 context. */
 101
 102 #define MD5_SIZE    16
 103
 104 typedef struct
 105 {
 106   uint32_t state[4];        /* state (ABCD) */
 107   uint32_t count[2];        /* number of bits, modulo 2^64 (lsb first) */
 108   uint8_t buffer[64];       /* input buffer */
 109 } MD5_CTX;
 110
 111 void MD5Init(MD5_CTX *);
 112 void MD5Update(MD5_CTX *, const uint8_t *msg, int len);
 113 void MD5Final(MD5_CTX *, uint8_t *digest);
 114
 115 /**************************************************************************
 116  * HMAC declarations
 117  **************************************************************************/
 118 void hmac_md5(const uint8_t *msg, int length, const uint8_t *key,
 119         int key_len, uint8_t *digest);
 120 void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key,
 121         int key_len, uint8_t *digest);
 122
 123 /**************************************************************************
 124  * RNG declarations
 125  **************************************************************************/
 126 void RNG_initialize(const uint8_t *seed_buf, int size);
 127 void RNG_terminate(void);
 128 void get_random(int num_rand_bytes, uint8_t *rand_data);
 129 //void get_random_NZ(int num_rand_bytes, uint8_t *rand_data);
 130
 131 #include <string.h>
 132 static inline void get_random_NZ(int num_rand_bytes, uint8_t *rand_data) {
 133         memset ( rand_data, 0x01, num_rand_bytes );
 134 }
 135
 136 /**************************************************************************
 137  * RSA declarations
 138  **************************************************************************/
 139
 140 typedef struct
 141 {
 142     bigint *m;              /* modulus */
 143     bigint *e;              /* public exponent */
 144     bigint *d;              /* private exponent */
 145 #ifdef CONFIG_BIGINT_CRT
 146     bigint *p;              /* p as in m = pq */
 147     bigint *q;              /* q as in m = pq */
 148     bigint *dP;             /* d mod (p-1) */
 149     bigint *dQ;             /* d mod (q-1) */
 150     bigint *qInv;           /* q^-1 mod p */
 151 #endif
 152     int num_octets;
 153     bigint *sig_m;         /* signature modulus */
 154     BI_CTX *bi_ctx;
 155 } RSA_CTX;
 156
 157 void RSA_priv_key_new(RSA_CTX **rsa_ctx,
 158         const uint8_t *modulus, int mod_len,
 159         const uint8_t *pub_exp, int pub_len,
 160         const uint8_t *priv_exp, int priv_len
 161 #ifdef CONFIG_BIGINT_CRT
 162       , const uint8_t *p, int p_len,
 163         const uint8_t *q, int q_len,
 164         const uint8_t *dP, int dP_len,
 165         const uint8_t *dQ, int dQ_len,
 166         const uint8_t *qInv, int qInv_len
 167 #endif
 168         );
 169 void RSA_pub_key_new(RSA_CTX **rsa_ctx,
 170         const uint8_t *modulus, int mod_len,
 171         const uint8_t *pub_exp, int pub_len);
 172 void RSA_free(RSA_CTX *ctx);
 173 int RSA_decrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint8_t *out_data,
 174         int is_decryption);
 175 bigint *RSA_private(const RSA_CTX *c, bigint *bi_msg);
 176 #ifdef CONFIG_SSL_CERT_VERIFICATION
 177 bigint *RSA_raw_sign_verify(RSA_CTX *c, bigint *bi_msg);
 178 bigint *RSA_sign_verify(BI_CTX *ctx, const uint8_t *sig, int sig_len,
 179         bigint *modulus, bigint *pub_exp);
 180 bigint *RSA_public(const RSA_CTX *c, bigint *bi_msg);
 181 int RSA_encrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint16_t in_len,
 182         uint8_t *out_data, int is_signing);
 183 void RSA_print(const RSA_CTX *ctx);
 184 #endif
 185
 186 /**************************************************************************
 187  * ASN1 declarations
 188  **************************************************************************/
 189 #define X509_OK                             0
 190 #define X509_NOT_OK                         -1
 191 #define X509_VFY_ERROR_NO_TRUSTED_CERT      -2
 192 #define X509_VFY_ERROR_BAD_SIGNATURE        -3
 193 #define X509_VFY_ERROR_NOT_YET_VALID        -4
 194 #define X509_VFY_ERROR_EXPIRED              -5
 195 #define X509_VFY_ERROR_SELF_SIGNED          -6
 196 #define X509_VFY_ERROR_INVALID_CHAIN        -7
 197 #define X509_VFY_ERROR_UNSUPPORTED_DIGEST   -8
 198 #define X509_INVALID_PRIV_KEY               -9
 199
 200 /*
 201  * The Distinguished Name
 202  */
 203 #define X509_NUM_DN_TYPES                   3
 204 #define X509_COMMON_NAME                    0
 205 #define X509_ORGANIZATION                   1
 206 #define X509_ORGANIZATIONAL_TYPE            2
 207
 208 #define ASN1_INTEGER            0x02
 209 #define ASN1_BIT_STRING         0x03
 210 #define ASN1_OCTET_STRING       0x04
 211 #define ASN1_NULL               0x05
 212 #define ASN1_OID                0x06
 213 #define ASN1_PRINTABLE_STR      0x13
 214 #define ASN1_TELETEX_STR        0x14
 215 #define ASN1_IA5_STR            0x16
 216 #define ASN1_UTC_TIME           0x17
 217 #define ASN1_SEQUENCE           0x30
 218 #define ASN1_SET                0x31
 219 #define ASN1_IMPLICIT_TAG       0x80
 220 #define ASN1_EXPLICIT_TAG       0xa0
 221
 222 #define SALT_SIZE               8
 223
 224 struct _x509_ctx
 225 {
 226     char *ca_cert_dn[X509_NUM_DN_TYPES];
 227     char *cert_dn[X509_NUM_DN_TYPES];
 228 #if defined(_WIN32_WCE)
 229     long not_before;
 230     long not_after;
 231 #else
 232     time_t not_before;
 233     time_t not_after;
 234 #endif
 235     uint8_t *signature;
 236     uint16_t sig_len;
 237     uint8_t sig_type;
 238     RSA_CTX *rsa_ctx;
 239     bigint *digest;
 240     struct _x509_ctx *next;
 241 };
 242
 243 typedef struct _x509_ctx X509_CTX;
 244
 245 #ifdef CONFIG_SSL_CERT_VERIFICATION
 246 typedef struct
 247 {
 248     X509_CTX *cert[CONFIG_X509_MAX_CA_CERTS];
 249 } CA_CERT_CTX;
 250 #endif
 251
 252 int asn1_get_private_key(const uint8_t *buf, int len, RSA_CTX **rsa_ctx);
 253 int asn1_next_obj(const uint8_t *buf, int *offset, int obj_type);
 254 int asn1_skip_obj(const uint8_t *buf, int *offset, int obj_type);
 255 int asn1_get_int(const uint8_t *buf, int *offset, uint8_t **object);
 256 int x509_new(const uint8_t *cert, int *len, X509_CTX **ctx);
 257 void x509_free(X509_CTX *x509_ctx);
 258 #ifdef CONFIG_SSL_CERT_VERIFICATION
 259 int x509_verify(const CA_CERT_CTX *ca_cert_ctx, const X509_CTX *cert);
 260 const uint8_t *x509_get_signature(const uint8_t *asn1_signature, int *len);
 261 #endif
 262 #ifdef CONFIG_SSL_FULL_MODE
 263 void x509_print(CA_CERT_CTX *ca_cert_ctx, const X509_CTX *cert);
 264 void x509_display_error(int error);
 265 #endif
 266
 267 /**************************************************************************
 268  * MISC declarations
 269  **************************************************************************/
 270
 271 extern const char * const unsupported_str;
 272
 273 typedef void (*crypt_func)(void *, const uint8_t *, uint8_t *, int);
 274 typedef void (*hmac_func)(const uint8_t *msg, int length, const uint8_t *key,
 275         int key_len, uint8_t *digest);
 276
 277 typedef struct
 278 {
 279     uint8_t *pre_data;  /* include the ssl record bytes */
 280     uint8_t *data;      /* the regular ssl data */
 281     int max_len;
 282     int index;
 283 } BUF_MEM;
 284
 285 BUF_MEM buf_new(void);
 286 void buf_grow(BUF_MEM *bm, int len);
 287 void buf_free(BUF_MEM *bm);
 288 int get_file(const char *filename, uint8_t **buf);
 289
 290 #if defined(CONFIG_SSL_FULL_MODE) || defined(WIN32) || defined(CONFIG_DEBUG)
 291 void print_blob(const char *format, const uint8_t *data, int size, ...);
 292 #else
 293     #define print_blob(...)
 294 #endif
 295
 296 #ifdef __cplusplus
 297 }
 298 #endif
 299
 300 #endif