crypto/libressl/crypto/evp/evp_locl.h

   1 /* $OpenBSD$ */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  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
  18  *    distribution.
  19  *
  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/)"
  24  *
  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.
  29  *
  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.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  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  * ====================================================================
  52  *
  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).
  56  *
  57  */
  58
  59 /* Macros to code block cipher wrappers */
  60
  61 /* Wrapper functions for each cipher mode */
  62
  63 #define BLOCK_CIPHER_ecb_loop() \
  64         size_t i, bl; \
  65         bl = ctx->cipher->block_size;\
  66         if(inl < bl) return 1;\
  67         inl -= bl; \
  68         for(i=0; i <= inl; i+=bl)
  69
  70 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
  71 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
  72 {\
  73         BLOCK_CIPHER_ecb_loop() \
  74                 cprefix##_ecb_encrypt(in + i, out + i, &((kstruct *)ctx->cipher_data)->ksched, ctx->encrypt);\
  75         return 1;\
  76 }
  77
  78 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
  79
  80 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
  81 static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
  82 {\
  83         while(inl>=EVP_MAXCHUNK)\
  84             {\
  85             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
  86             inl-=EVP_MAXCHUNK;\
  87             in +=EVP_MAXCHUNK;\
  88             out+=EVP_MAXCHUNK;\
  89             }\
  90         if (inl)\
  91             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
  92         return 1;\
  93 }
  94
  95 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
  96 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
  97 {\
  98         while(inl>=EVP_MAXCHUNK) \
  99             {\
 100             cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
 101             inl-=EVP_MAXCHUNK;\
 102             in +=EVP_MAXCHUNK;\
 103             out+=EVP_MAXCHUNK;\
 104             }\
 105         if (inl)\
 106             cprefix##_cbc_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
 107         return 1;\
 108 }
 109
 110 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 111 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 112 {\
 113         size_t chunk=EVP_MAXCHUNK;\
 114         if (cbits==1)  chunk>>=3;\
 115         if (inl<chunk) chunk=inl;\
 116         while(inl && inl>=chunk)\
 117             {\
 118             cprefix##_cfb##cbits##_encrypt(in, out, (long)((cbits==1) && !(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) ?inl*8:inl), &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num, ctx->encrypt);\
 119             inl-=chunk;\
 120             in +=chunk;\
 121             out+=chunk;\
 122             if(inl<chunk) chunk=inl;\
 123             }\
 124         return 1;\
 125 }
 126
 127 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 128         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 129         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 130         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 131         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 132
 133 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 134                           key_len, iv_len, flags, init_key, cleanup, \
 135                           set_asn1, get_asn1, ctrl) \
 136 static const EVP_CIPHER cname##_##mode = { \
 137         nid##_##nmode, block_size, key_len, iv_len, \
 138         flags | EVP_CIPH_##MODE##_MODE, \
 139         init_key, \
 140         cname##_##mode##_cipher, \
 141         cleanup, \
 142         sizeof(kstruct), \
 143         set_asn1, get_asn1,\
 144         ctrl, \
 145         NULL \
 146 }; \
 147 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 148
 149 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 150                              iv_len, flags, init_key, cleanup, set_asn1, \
 151                              get_asn1, ctrl) \
 152 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 153                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 154
 155 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 156                              iv_len, cbits, flags, init_key, cleanup, \
 157                              set_asn1, get_asn1, ctrl) \
 158 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 159                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 160                   get_asn1, ctrl)
 161
 162 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 163                              iv_len, cbits, flags, init_key, cleanup, \
 164                              set_asn1, get_asn1, ctrl) \
 165 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 166                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 167                   get_asn1, ctrl)
 168
 169 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 170                              flags, init_key, cleanup, set_asn1, \
 171                              get_asn1, ctrl) \
 172 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 173                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 174
 175 #define BLOCK_CIPHER_defs(cname, kstruct, \
 176                           nid, block_size, key_len, iv_len, cbits, flags, \
 177                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 178 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 179                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 180 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 181                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 182 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 183                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 184 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 185                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 186
 187
 188 /*
 189 #define BLOCK_CIPHER_defs(cname, kstruct, \
 190                                 nid, block_size, key_len, iv_len, flags,\
 191                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 192 static const EVP_CIPHER cname##_cbc = {\
 193         nid##_cbc, block_size, key_len, iv_len, \
 194         flags | EVP_CIPH_CBC_MODE,\
 195         init_key,\
 196         cname##_cbc_cipher,\
 197         cleanup,\
 198         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 199                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 200         set_asn1, get_asn1,\
 201         ctrl, \
 202         NULL \
 203 };\
 204 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 205 static const EVP_CIPHER cname##_cfb = {\
 206         nid##_cfb64, 1, key_len, iv_len, \
 207         flags | EVP_CIPH_CFB_MODE,\
 208         init_key,\
 209         cname##_cfb_cipher,\
 210         cleanup,\
 211         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 212                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 213         set_asn1, get_asn1,\
 214         ctrl,\
 215         NULL \
 216 };\
 217 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 218 static const EVP_CIPHER cname##_ofb = {\
 219         nid##_ofb64, 1, key_len, iv_len, \
 220         flags | EVP_CIPH_OFB_MODE,\
 221         init_key,\
 222         cname##_ofb_cipher,\
 223         cleanup,\
 224         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 225                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 226         set_asn1, get_asn1,\
 227         ctrl,\
 228         NULL \
 229 };\
 230 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 231 static const EVP_CIPHER cname##_ecb = {\
 232         nid##_ecb, block_size, key_len, iv_len, \
 233         flags | EVP_CIPH_ECB_MODE,\
 234         init_key,\
 235         cname##_ecb_cipher,\
 236         cleanup,\
 237         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 238                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 239         set_asn1, get_asn1,\
 240         ctrl,\
 241         NULL \
 242 };\
 243 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 244 */
 245
 246 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 247                                block_size, key_len, iv_len, cbits, \
 248                                flags, init_key, \
 249                                cleanup, set_asn1, get_asn1, ctrl) \
 250         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 251         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 252                           cbits, flags, init_key, cleanup, set_asn1, \
 253                           get_asn1, ctrl)
 254
 255 #define EVP_C_DATA(kstruct, ctx)        ((kstruct *)(ctx)->cipher_data)
 256
 257 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len) \
 258         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 259         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 260                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 261                              0, cipher##_init_key, NULL, \
 262                              EVP_CIPHER_set_asn1_iv, \
 263                              EVP_CIPHER_get_asn1_iv, \
 264                              NULL)
 265
 266                                                                                 struct evp_pkey_ctx_st {
 267         /* Method associated with this operation */
 268         const EVP_PKEY_METHOD *pmeth;
 269         /* Engine that implements this method or NULL if builtin */
 270         ENGINE *engine;
 271         /* Key: may be NULL */
 272         EVP_PKEY *pkey;
 273         /* Peer key for key agreement, may be NULL */
 274         EVP_PKEY *peerkey;
 275         /* Actual operation */
 276         int operation;
 277         /* Algorithm specific data */
 278         void *data;
 279         /* Application specific data */
 280         void *app_data;
 281         /* Keygen callback */
 282         EVP_PKEY_gen_cb *pkey_gencb;
 283         /* implementation specific keygen data */
 284         int *keygen_info;
 285         int keygen_info_count;
 286 } /* EVP_PKEY_CTX */;
 287
 288 #define EVP_PKEY_FLAG_DYNAMIC   1
 289
 290 struct evp_pkey_method_st {
 291         int pkey_id;
 292         int flags;
 293
 294         int (*init)(EVP_PKEY_CTX *ctx);
 295         int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
 296         void (*cleanup)(EVP_PKEY_CTX *ctx);
 297
 298         int (*paramgen_init)(EVP_PKEY_CTX *ctx);
 299         int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
 300
 301         int (*keygen_init)(EVP_PKEY_CTX *ctx);
 302         int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
 303
 304         int (*sign_init)(EVP_PKEY_CTX *ctx);
 305         int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 306             const unsigned char *tbs, size_t tbslen);
 307
 308         int (*verify_init)(EVP_PKEY_CTX *ctx);
 309         int (*verify)(EVP_PKEY_CTX *ctx,
 310             const unsigned char *sig, size_t siglen,
 311             const unsigned char *tbs, size_t tbslen);
 312
 313         int (*verify_recover_init)(EVP_PKEY_CTX *ctx);
 314         int (*verify_recover)(EVP_PKEY_CTX *ctx,
 315             unsigned char *rout, size_t *routlen,
 316             const unsigned char *sig, size_t siglen);
 317
 318         int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 319         int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 320             EVP_MD_CTX *mctx);
 321
 322         int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 323         int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,
 324             int siglen, EVP_MD_CTX *mctx);
 325
 326         int (*encrypt_init)(EVP_PKEY_CTX *ctx);
 327         int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 328             const unsigned char *in, size_t inlen);
 329
 330         int (*decrypt_init)(EVP_PKEY_CTX *ctx);
 331         int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 332             const unsigned char *in, size_t inlen);
 333
 334         int (*derive_init)(EVP_PKEY_CTX *ctx);
 335         int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 336
 337         int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
 338         int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value);
 339 } /* EVP_PKEY_METHOD */;
 340
 341 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
 342
 343 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
 344     ASN1_TYPE *param, const EVP_CIPHER *c, const EVP_MD *md, int en_de);
 345
 346 /* EVP_AEAD represents a specific AEAD algorithm. */
 347 struct evp_aead_st {
 348         unsigned char key_len;
 349         unsigned char nonce_len;
 350         unsigned char overhead;
 351         unsigned char max_tag_len;
 352
 353         int (*init)(struct evp_aead_ctx_st*, const unsigned char *key,
 354             size_t key_len, size_t tag_len);
 355         void (*cleanup)(struct evp_aead_ctx_st*);
 356
 357         int (*seal)(const struct evp_aead_ctx_st *ctx, unsigned char *out,
 358             size_t *out_len, size_t max_out_len, const unsigned char *nonce,
 359             size_t nonce_len, const unsigned char *in, size_t in_len,
 360             const unsigned char *ad, size_t ad_len);
 361
 362         int (*open)(const struct evp_aead_ctx_st *ctx, unsigned char *out,
 363             size_t *out_len, size_t max_out_len, const unsigned char *nonce,
 364             size_t nonce_len, const unsigned char *in, size_t in_len,
 365             const unsigned char *ad, size_t ad_len);
 366 };