crypto/include/internal/evp_int.h

   1 /*
   2  * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "internal/refcount.h"
  11
  12 struct evp_pkey_ctx_st {
  13     /* Method associated with this operation */
  14     const EVP_PKEY_METHOD *pmeth;
  15     /* Engine that implements this method or NULL if builtin */
  16     ENGINE *engine;
  17     /* Key: may be NULL */
  18     EVP_PKEY *pkey;
  19     /* Peer key for key agreement, may be NULL */
  20     EVP_PKEY *peerkey;
  21     /* Actual operation */
  22     int operation;
  23     /* Algorithm specific data */
  24     void *data;
  25     /* Application specific data */
  26     void *app_data;
  27     /* Keygen callback */
  28     EVP_PKEY_gen_cb *pkey_gencb;
  29     /* implementation specific keygen data */
  30     int *keygen_info;
  31     int keygen_info_count;
  32 } /* EVP_PKEY_CTX */ ;
  33
  34 #define EVP_PKEY_FLAG_DYNAMIC   1
  35
  36 struct evp_pkey_method_st {
  37     int pkey_id;
  38     int flags;
  39     int (*init) (EVP_PKEY_CTX *ctx);
  40     int (*copy) (EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
  41     void (*cleanup) (EVP_PKEY_CTX *ctx);
  42     int (*paramgen_init) (EVP_PKEY_CTX *ctx);
  43     int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  44     int (*keygen_init) (EVP_PKEY_CTX *ctx);
  45     int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  46     int (*sign_init) (EVP_PKEY_CTX *ctx);
  47     int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
  48                  const unsigned char *tbs, size_t tbslen);
  49     int (*verify_init) (EVP_PKEY_CTX *ctx);
  50     int (*verify) (EVP_PKEY_CTX *ctx,
  51                    const unsigned char *sig, size_t siglen,
  52                    const unsigned char *tbs, size_t tbslen);
  53     int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
  54     int (*verify_recover) (EVP_PKEY_CTX *ctx,
  55                            unsigned char *rout, size_t *routlen,
  56                            const unsigned char *sig, size_t siglen);
  57     int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
  58     int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
  59                     EVP_MD_CTX *mctx);
  60     int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
  61     int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
  62                       EVP_MD_CTX *mctx);
  63     int (*encrypt_init) (EVP_PKEY_CTX *ctx);
  64     int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
  65                     const unsigned char *in, size_t inlen);
  66     int (*decrypt_init) (EVP_PKEY_CTX *ctx);
  67     int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
  68                     const unsigned char *in, size_t inlen);
  69     int (*derive_init) (EVP_PKEY_CTX *ctx);
  70     int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
  71     int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
  72     int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
  73     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
  74                        const unsigned char *tbs, size_t tbslen);
  75     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
  76                          size_t siglen, const unsigned char *tbs,
  77                          size_t tbslen);
  78     int (*check) (EVP_PKEY *pkey);
  79     int (*public_check) (EVP_PKEY *pkey);
  80     int (*param_check) (EVP_PKEY *pkey);
  81 } /* EVP_PKEY_METHOD */ ;
  82
  83 DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
  84
  85 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
  86
  87 extern const EVP_PKEY_METHOD cmac_pkey_meth;
  88 extern const EVP_PKEY_METHOD dh_pkey_meth;
  89 extern const EVP_PKEY_METHOD dhx_pkey_meth;
  90 extern const EVP_PKEY_METHOD dsa_pkey_meth;
  91 extern const EVP_PKEY_METHOD ec_pkey_meth;
  92 extern const EVP_PKEY_METHOD ecx25519_pkey_meth;
  93 extern const EVP_PKEY_METHOD ecx448_pkey_meth;
  94 extern const EVP_PKEY_METHOD ed25519_pkey_meth;
  95 extern const EVP_PKEY_METHOD ed448_pkey_meth;
  96 extern const EVP_PKEY_METHOD hmac_pkey_meth;
  97 extern const EVP_PKEY_METHOD rsa_pkey_meth;
  98 extern const EVP_PKEY_METHOD rsa_pss_pkey_meth;
  99 extern const EVP_PKEY_METHOD scrypt_pkey_meth;
 100 extern const EVP_PKEY_METHOD tls1_prf_pkey_meth;
 101 extern const EVP_PKEY_METHOD hkdf_pkey_meth;
 102 extern const EVP_PKEY_METHOD poly1305_pkey_meth;
 103 extern const EVP_PKEY_METHOD siphash_pkey_meth;
 104
 105 struct evp_md_st {
 106     int type;
 107     int pkey_type;
 108     int md_size;
 109     unsigned long flags;
 110     int (*init) (EVP_MD_CTX *ctx);
 111     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
 112     int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
 113     int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
 114     int (*cleanup) (EVP_MD_CTX *ctx);
 115     int block_size;
 116     int ctx_size;               /* how big does the ctx->md_data need to be */
 117     /* control function */
 118     int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
 119 } /* EVP_MD */ ;
 120
 121 struct evp_cipher_st {
 122     int nid;
 123     int block_size;
 124     /* Default value for variable length ciphers */
 125     int key_len;
 126     int iv_len;
 127     /* Various flags */
 128     unsigned long flags;
 129     /* init key */
 130     int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
 131                  const unsigned char *iv, int enc);
 132     /* encrypt/decrypt data */
 133     int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
 134                       const unsigned char *in, size_t inl);
 135     /* cleanup ctx */
 136     int (*cleanup) (EVP_CIPHER_CTX *);
 137     /* how big ctx->cipher_data needs to be */
 138     int ctx_size;
 139     /* Populate a ASN1_TYPE with parameters */
 140     int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 141     /* Get parameters from a ASN1_TYPE */
 142     int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 143     /* Miscellaneous operations */
 144     int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
 145     /* Application data */
 146     void *app_data;
 147 } /* EVP_CIPHER */ ;
 148
 149 /* Macros to code block cipher wrappers */
 150
 151 /* Wrapper functions for each cipher mode */
 152
 153 #define EVP_C_DATA(kstruct, ctx) \
 154         ((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 155
 156 #define BLOCK_CIPHER_ecb_loop() \
 157         size_t i, bl; \
 158         bl = EVP_CIPHER_CTX_cipher(ctx)->block_size;    \
 159         if (inl < bl) return 1;\
 160         inl -= bl; \
 161         for (i=0; i <= inl; i+=bl)
 162
 163 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 164 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 165 {\
 166         BLOCK_CIPHER_ecb_loop() \
 167             cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
 168         return 1;\
 169 }
 170
 171 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
 172
 173 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 174     static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 175 {\
 176         while(inl>=EVP_MAXCHUNK) {\
 177             int num = EVP_CIPHER_CTX_num(ctx);\
 178             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 179             EVP_CIPHER_CTX_set_num(ctx, num);\
 180             inl-=EVP_MAXCHUNK;\
 181             in +=EVP_MAXCHUNK;\
 182             out+=EVP_MAXCHUNK;\
 183         }\
 184         if (inl) {\
 185             int num = EVP_CIPHER_CTX_num(ctx);\
 186             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 187             EVP_CIPHER_CTX_set_num(ctx, num);\
 188         }\
 189         return 1;\
 190 }
 191
 192 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 193 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 194 {\
 195         while(inl>=EVP_MAXCHUNK) \
 196             {\
 197             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));\
 198             inl-=EVP_MAXCHUNK;\
 199             in +=EVP_MAXCHUNK;\
 200             out+=EVP_MAXCHUNK;\
 201             }\
 202         if (inl)\
 203             cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
 204         return 1;\
 205 }
 206
 207 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched)  \
 208 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 209 {\
 210     size_t chunk = EVP_MAXCHUNK;\
 211     if (cbits == 1)  chunk >>= 3;\
 212     if (inl < chunk) chunk = inl;\
 213     while (inl && inl >= chunk)\
 214     {\
 215         int num = EVP_CIPHER_CTX_num(ctx);\
 216         cprefix##_cfb##cbits##_encrypt(in, out, (long) \
 217             ((cbits == 1) \
 218                 && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
 219                 ? chunk*8 : chunk), \
 220             &EVP_C_DATA(kstruct, ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx),\
 221             &num, EVP_CIPHER_CTX_encrypting(ctx));\
 222         EVP_CIPHER_CTX_set_num(ctx, num);\
 223         inl -= chunk;\
 224         in += chunk;\
 225         out += chunk;\
 226         if (inl < chunk) chunk = inl;\
 227     }\
 228     return 1;\
 229 }
 230
 231 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 232         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 233         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 234         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 235         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 236
 237 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 238                           key_len, iv_len, flags, init_key, cleanup, \
 239                           set_asn1, get_asn1, ctrl) \
 240 static const EVP_CIPHER cname##_##mode = { \
 241         nid##_##nmode, block_size, key_len, iv_len, \
 242         flags | EVP_CIPH_##MODE##_MODE, \
 243         init_key, \
 244         cname##_##mode##_cipher, \
 245         cleanup, \
 246         sizeof(kstruct), \
 247         set_asn1, get_asn1,\
 248         ctrl, \
 249         NULL \
 250 }; \
 251 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 252
 253 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 254                              iv_len, flags, init_key, cleanup, set_asn1, \
 255                              get_asn1, ctrl) \
 256 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 257                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 258
 259 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 260                              iv_len, cbits, flags, init_key, cleanup, \
 261                              set_asn1, get_asn1, ctrl) \
 262 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 263                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 264                   get_asn1, ctrl)
 265
 266 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 267                              iv_len, cbits, flags, init_key, cleanup, \
 268                              set_asn1, get_asn1, ctrl) \
 269 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 270                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 271                   get_asn1, ctrl)
 272
 273 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 274                              flags, init_key, cleanup, set_asn1, \
 275                              get_asn1, ctrl) \
 276 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 277                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 278
 279 #define BLOCK_CIPHER_defs(cname, kstruct, \
 280                           nid, block_size, key_len, iv_len, cbits, flags, \
 281                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 282 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 283                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 284 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 285                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 286 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 287                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 288 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 289                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 290
 291 /*-
 292 #define BLOCK_CIPHER_defs(cname, kstruct, \
 293                                 nid, block_size, key_len, iv_len, flags,\
 294                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 295 static const EVP_CIPHER cname##_cbc = {\
 296         nid##_cbc, block_size, key_len, iv_len, \
 297         flags | EVP_CIPH_CBC_MODE,\
 298         init_key,\
 299         cname##_cbc_cipher,\
 300         cleanup,\
 301         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 302                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 303         set_asn1, get_asn1,\
 304         ctrl, \
 305         NULL \
 306 };\
 307 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 308 static const EVP_CIPHER cname##_cfb = {\
 309         nid##_cfb64, 1, key_len, iv_len, \
 310         flags | EVP_CIPH_CFB_MODE,\
 311         init_key,\
 312         cname##_cfb_cipher,\
 313         cleanup,\
 314         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 315                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 316         set_asn1, get_asn1,\
 317         ctrl,\
 318         NULL \
 319 };\
 320 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 321 static const EVP_CIPHER cname##_ofb = {\
 322         nid##_ofb64, 1, key_len, iv_len, \
 323         flags | EVP_CIPH_OFB_MODE,\
 324         init_key,\
 325         cname##_ofb_cipher,\
 326         cleanup,\
 327         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 328                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 329         set_asn1, get_asn1,\
 330         ctrl,\
 331         NULL \
 332 };\
 333 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 334 static const EVP_CIPHER cname##_ecb = {\
 335         nid##_ecb, block_size, key_len, iv_len, \
 336         flags | EVP_CIPH_ECB_MODE,\
 337         init_key,\
 338         cname##_ecb_cipher,\
 339         cleanup,\
 340         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 341                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 342         set_asn1, get_asn1,\
 343         ctrl,\
 344         NULL \
 345 };\
 346 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 347 */
 348
 349 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 350                                block_size, key_len, iv_len, cbits, \
 351                                flags, init_key, \
 352                                cleanup, set_asn1, get_asn1, ctrl) \
 353         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 354         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 355                           cbits, flags, init_key, cleanup, set_asn1, \
 356                           get_asn1, ctrl)
 357
 358 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
 359         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 360         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 361                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 362                              (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
 363                              cipher##_init_key, NULL, NULL, NULL, NULL)
 364
 365
 366 # ifndef OPENSSL_NO_EC
 367
 368 #define X25519_KEYLEN        32
 369 #define X448_KEYLEN          56
 370 #define ED448_KEYLEN         57
 371
 372 #define MAX_KEYLEN  ED448_KEYLEN
 373
 374 typedef struct {
 375     unsigned char pubkey[MAX_KEYLEN];
 376     unsigned char *privkey;
 377 } ECX_KEY;
 378
 379 #endif
 380
 381 /*
 382  * Type needs to be a bit field Sub-type needs to be for variations on the
 383  * method, as in, can it do arbitrary encryption....
 384  */
 385 struct evp_pkey_st {
 386     int type;
 387     int save_type;
 388     CRYPTO_REF_COUNT references;
 389     const EVP_PKEY_ASN1_METHOD *ameth;
 390     ENGINE *engine;
 391     ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
 392     union {
 393         void *ptr;
 394 # ifndef OPENSSL_NO_RSA
 395         struct rsa_st *rsa;     /* RSA */
 396 # endif
 397 # ifndef OPENSSL_NO_DSA
 398         struct dsa_st *dsa;     /* DSA */
 399 # endif
 400 # ifndef OPENSSL_NO_DH
 401         struct dh_st *dh;       /* DH */
 402 # endif
 403 # ifndef OPENSSL_NO_EC
 404         struct ec_key_st *ec;   /* ECC */
 405         ECX_KEY *ecx;           /* X25519, X448, Ed25519, Ed448 */
 406 # endif
 407     } pkey;
 408     int save_parameters;
 409     STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
 410     CRYPTO_RWLOCK *lock;
 411 } /* EVP_PKEY */ ;
 412
 413
 414 void openssl_add_all_ciphers_int(void);
 415 void openssl_add_all_digests_int(void);
 416 void evp_cleanup_int(void);
 417 void evp_app_cleanup_int(void);
 418
 419 /* Pulling defines out of C source files */
 420
 421 #define EVP_RC4_KEY_SIZE 16
 422 #ifndef TLS1_1_VERSION
 423 # define TLS1_1_VERSION   0x0302
 424 #endif