crypto/include/internal/evp_int.h

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2015.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2015 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 struct evp_pkey_ctx_st {
  60     /* Method associated with this operation */
  61     const EVP_PKEY_METHOD *pmeth;
  62     /* Engine that implements this method or NULL if builtin */
  63     ENGINE *engine;
  64     /* Key: may be NULL */
  65     EVP_PKEY *pkey;
  66     /* Peer key for key agreement, may be NULL */
  67     EVP_PKEY *peerkey;
  68     /* Actual operation */
  69     int operation;
  70     /* Algorithm specific data */
  71     void *data;
  72     /* Application specific data */
  73     void *app_data;
  74     /* Keygen callback */
  75     EVP_PKEY_gen_cb *pkey_gencb;
  76     /* implementation specific keygen data */
  77     int *keygen_info;
  78     int keygen_info_count;
  79 } /* EVP_PKEY_CTX */ ;
  80
  81 #define EVP_PKEY_FLAG_DYNAMIC   1
  82
  83 struct evp_pkey_method_st {
  84     int pkey_id;
  85     int flags;
  86     int (*init) (EVP_PKEY_CTX *ctx);
  87     int (*copy) (EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
  88     void (*cleanup) (EVP_PKEY_CTX *ctx);
  89     int (*paramgen_init) (EVP_PKEY_CTX *ctx);
  90     int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  91     int (*keygen_init) (EVP_PKEY_CTX *ctx);
  92     int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  93     int (*sign_init) (EVP_PKEY_CTX *ctx);
  94     int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
  95                  const unsigned char *tbs, size_t tbslen);
  96     int (*verify_init) (EVP_PKEY_CTX *ctx);
  97     int (*verify) (EVP_PKEY_CTX *ctx,
  98                    const unsigned char *sig, size_t siglen,
  99                    const unsigned char *tbs, size_t tbslen);
 100     int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
 101     int (*verify_recover) (EVP_PKEY_CTX *ctx,
 102                            unsigned char *rout, size_t *routlen,
 103                            const unsigned char *sig, size_t siglen);
 104     int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 105     int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 106                     EVP_MD_CTX *mctx);
 107     int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 108     int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
 109                       EVP_MD_CTX *mctx);
 110     int (*encrypt_init) (EVP_PKEY_CTX *ctx);
 111     int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 112                     const unsigned char *in, size_t inlen);
 113     int (*decrypt_init) (EVP_PKEY_CTX *ctx);
 114     int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 115                     const unsigned char *in, size_t inlen);
 116     int (*derive_init) (EVP_PKEY_CTX *ctx);
 117     int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 118     int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
 119     int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
 120 } /* EVP_PKEY_METHOD */ ;
 121
 122 DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
 123
 124 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
 125
 126 extern const EVP_PKEY_METHOD cmac_pkey_meth;
 127 extern const EVP_PKEY_METHOD dh_pkey_meth;
 128 extern const EVP_PKEY_METHOD dhx_pkey_meth;
 129 extern const EVP_PKEY_METHOD dsa_pkey_meth;
 130 extern const EVP_PKEY_METHOD ec_pkey_meth;
 131 extern const EVP_PKEY_METHOD hmac_pkey_meth;
 132 extern const EVP_PKEY_METHOD rsa_pkey_meth;
 133 extern const EVP_PKEY_METHOD tls1_prf_pkey_meth;
 134
 135 struct evp_md_st {
 136     int type;
 137     int pkey_type;
 138     int md_size;
 139     unsigned long flags;
 140     int (*init) (EVP_MD_CTX *ctx);
 141     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
 142     int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
 143     int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
 144     int (*cleanup) (EVP_MD_CTX *ctx);
 145     int block_size;
 146     int ctx_size;               /* how big does the ctx->md_data need to be */
 147     /* control function */
 148     int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
 149 } /* EVP_MD */ ;
 150
 151 struct evp_cipher_st {
 152     int nid;
 153     int block_size;
 154     /* Default value for variable length ciphers */
 155     int key_len;
 156     int iv_len;
 157     /* Various flags */
 158     unsigned long flags;
 159     /* init key */
 160     int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
 161                  const unsigned char *iv, int enc);
 162     /* encrypt/decrypt data */
 163     int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
 164                       const unsigned char *in, size_t inl);
 165     /* cleanup ctx */
 166     int (*cleanup) (EVP_CIPHER_CTX *);
 167     /* how big ctx->cipher_data needs to be */
 168     int ctx_size;
 169     /* Populate a ASN1_TYPE with parameters */
 170     int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 171     /* Get parameters from a ASN1_TYPE */
 172     int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 173     /* Miscellaneous operations */
 174     int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
 175     /* Application data */
 176     void *app_data;
 177 } /* EVP_CIPHER */ ;
 178
 179 /* Macros to code block cipher wrappers */
 180
 181 /* Wrapper functions for each cipher mode */
 182
 183 #define EVP_C_DATA(kstruct, ctx)   ((kstruct *)EVP_CIPHER_CTX_cipher_data(ctx))
 184
 185 #define BLOCK_CIPHER_ecb_loop() \
 186         size_t i, bl; \
 187         bl = EVP_CIPHER_CTX_cipher(ctx)->block_size;    \
 188         if(inl < bl) return 1;\
 189         inl -= bl; \
 190         for(i=0; i <= inl; i+=bl)
 191
 192 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 193 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 194 {\
 195         BLOCK_CIPHER_ecb_loop() \
 196             cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
 197         return 1;\
 198 }
 199
 200 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
 201
 202 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 203     static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 204 {\
 205         while(inl>=EVP_MAXCHUNK) {\
 206             int num = EVP_CIPHER_CTX_num(ctx);\
 207             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 208             EVP_CIPHER_CTX_set_num(ctx, num);\
 209             inl-=EVP_MAXCHUNK;\
 210             in +=EVP_MAXCHUNK;\
 211             out+=EVP_MAXCHUNK;\
 212         }\
 213         if (inl) {\
 214             int num = EVP_CIPHER_CTX_num(ctx);\
 215             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 216             EVP_CIPHER_CTX_set_num(ctx, num);\
 217         }\
 218         return 1;\
 219 }
 220
 221 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 222 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 223 {\
 224         while(inl>=EVP_MAXCHUNK) \
 225             {\
 226             cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
 227             inl-=EVP_MAXCHUNK;\
 228             in +=EVP_MAXCHUNK;\
 229             out+=EVP_MAXCHUNK;\
 230             }\
 231         if (inl)\
 232             cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
 233         return 1;\
 234 }
 235
 236 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched)  \
 237 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 238 {\
 239         size_t chunk=EVP_MAXCHUNK;\
 240         if (cbits==1)  chunk>>=3;\
 241         if (inl<chunk) chunk=inl;\
 242         while(inl && inl>=chunk)\
 243             {\
 244             int num = EVP_CIPHER_CTX_num(ctx);\
 245             cprefix##_cfb##cbits##_encrypt(in, out, (long)((cbits==1) && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) ?inl*8:inl), &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx)); \
 246             EVP_CIPHER_CTX_set_num(ctx, num);\
 247             inl-=chunk;\
 248             in +=chunk;\
 249             out+=chunk;\
 250             if(inl<chunk) chunk=inl;\
 251             }\
 252         return 1;\
 253 }
 254
 255 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 256         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 257         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 258         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 259         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 260
 261 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 262                           key_len, iv_len, flags, init_key, cleanup, \
 263                           set_asn1, get_asn1, ctrl) \
 264 static const EVP_CIPHER cname##_##mode = { \
 265         nid##_##nmode, block_size, key_len, iv_len, \
 266         flags | EVP_CIPH_##MODE##_MODE, \
 267         init_key, \
 268         cname##_##mode##_cipher, \
 269         cleanup, \
 270         sizeof(kstruct), \
 271         set_asn1, get_asn1,\
 272         ctrl, \
 273         NULL \
 274 }; \
 275 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 276
 277 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 278                              iv_len, flags, init_key, cleanup, set_asn1, \
 279                              get_asn1, ctrl) \
 280 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 281                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 282
 283 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 284                              iv_len, cbits, flags, init_key, cleanup, \
 285                              set_asn1, get_asn1, ctrl) \
 286 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 287                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 288                   get_asn1, ctrl)
 289
 290 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 291                              iv_len, cbits, flags, init_key, cleanup, \
 292                              set_asn1, get_asn1, ctrl) \
 293 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 294                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 295                   get_asn1, ctrl)
 296
 297 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 298                              flags, init_key, cleanup, set_asn1, \
 299                              get_asn1, ctrl) \
 300 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 301                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 302
 303 #define BLOCK_CIPHER_defs(cname, kstruct, \
 304                           nid, block_size, key_len, iv_len, cbits, flags, \
 305                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 306 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 307                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 308 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 309                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 310 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 311                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 312 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 313                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 314
 315 /*-
 316 #define BLOCK_CIPHER_defs(cname, kstruct, \
 317                                 nid, block_size, key_len, iv_len, flags,\
 318                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 319 static const EVP_CIPHER cname##_cbc = {\
 320         nid##_cbc, block_size, key_len, iv_len, \
 321         flags | EVP_CIPH_CBC_MODE,\
 322         init_key,\
 323         cname##_cbc_cipher,\
 324         cleanup,\
 325         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 326                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 327         set_asn1, get_asn1,\
 328         ctrl, \
 329         NULL \
 330 };\
 331 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 332 static const EVP_CIPHER cname##_cfb = {\
 333         nid##_cfb64, 1, key_len, iv_len, \
 334         flags | EVP_CIPH_CFB_MODE,\
 335         init_key,\
 336         cname##_cfb_cipher,\
 337         cleanup,\
 338         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 339                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 340         set_asn1, get_asn1,\
 341         ctrl,\
 342         NULL \
 343 };\
 344 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 345 static const EVP_CIPHER cname##_ofb = {\
 346         nid##_ofb64, 1, key_len, iv_len, \
 347         flags | EVP_CIPH_OFB_MODE,\
 348         init_key,\
 349         cname##_ofb_cipher,\
 350         cleanup,\
 351         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 352                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 353         set_asn1, get_asn1,\
 354         ctrl,\
 355         NULL \
 356 };\
 357 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 358 static const EVP_CIPHER cname##_ecb = {\
 359         nid##_ecb, block_size, key_len, iv_len, \
 360         flags | EVP_CIPH_ECB_MODE,\
 361         init_key,\
 362         cname##_ecb_cipher,\
 363         cleanup,\
 364         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 365                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 366         set_asn1, get_asn1,\
 367         ctrl,\
 368         NULL \
 369 };\
 370 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 371 */
 372
 373 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 374                                block_size, key_len, iv_len, cbits, \
 375                                flags, init_key, \
 376                                cleanup, set_asn1, get_asn1, ctrl) \
 377         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 378         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 379                           cbits, flags, init_key, cleanup, set_asn1, \
 380                           get_asn1, ctrl)
 381
 382 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
 383         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 384         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 385                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 386                              (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
 387                              cipher##_init_key, NULL, NULL, NULL, NULL)
 388
 389
 390 /*
 391  * Type needs to be a bit field Sub-type needs to be for variations on the
 392  * method, as in, can it do arbitrary encryption....
 393  */
 394 struct evp_pkey_st {
 395     int type;
 396     int save_type;
 397     int references;
 398     const EVP_PKEY_ASN1_METHOD *ameth;
 399     ENGINE *engine;
 400     union {
 401         char *ptr;
 402 # ifndef OPENSSL_NO_RSA
 403         struct rsa_st *rsa;     /* RSA */
 404 # endif
 405 # ifndef OPENSSL_NO_DSA
 406         struct dsa_st *dsa;     /* DSA */
 407 # endif
 408 # ifndef OPENSSL_NO_DH
 409         struct dh_st *dh;       /* DH */
 410 # endif
 411 # ifndef OPENSSL_NO_EC
 412         struct ec_key_st *ec;   /* ECC */
 413 # endif
 414     } pkey;
 415     int save_parameters;
 416     STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
 417 } /* EVP_PKEY */ ;