include/crypto/evp.h

   1 /*
   2  * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 <openssl/evp.h>
  11 #include <openssl/core_numbers.h>
  12 #include "internal/refcount.h"
  13 #include "crypto/ecx.h"
  14
  15 /*
  16  * Don't free up md_ctx->pctx in EVP_MD_CTX_reset, use the reserved flag
  17  * values in evp.h
  18  */
  19 #define EVP_MD_CTX_FLAG_KEEP_PKEY_CTX   0x0400
  20
  21 struct evp_pkey_ctx_st {
  22     /* Actual operation */
  23     int operation;
  24
  25     /*
  26      * Library context, Key type name and properties associated
  27      * with this context
  28      */
  29     OPENSSL_CTX *libctx;
  30     const char *keytype;
  31     const char *propquery;
  32
  33     /* cached key manager */
  34     EVP_KEYMGMT *keymgmt;
  35
  36     union {
  37         struct {
  38             EVP_KEYEXCH *exchange;
  39             void *exchprovctx;
  40         } kex;
  41
  42         struct {
  43             EVP_SIGNATURE *signature;
  44             void *sigprovctx;
  45         } sig;
  46
  47         struct {
  48             EVP_ASYM_CIPHER *cipher;
  49             void *ciphprovctx;
  50         } ciph;
  51     } op;
  52
  53     /* Legacy fields below */
  54
  55     /* Method associated with this operation */
  56     const EVP_PKEY_METHOD *pmeth;
  57     /* Engine that implements this method or NULL if builtin */
  58     ENGINE *engine;
  59     /* Key: may be NULL */
  60     EVP_PKEY *pkey;
  61     /* Peer key for key agreement, may be NULL */
  62     EVP_PKEY *peerkey;
  63     /* Algorithm specific data */
  64     void *data;
  65     /* Application specific data */
  66     void *app_data;
  67     /* Keygen callback */
  68     EVP_PKEY_gen_cb *pkey_gencb;
  69     /* implementation specific keygen data */
  70     int *keygen_info;
  71     int keygen_info_count;
  72 } /* EVP_PKEY_CTX */ ;
  73
  74 #define EVP_PKEY_FLAG_DYNAMIC   1
  75
  76 struct evp_pkey_method_st {
  77     int pkey_id;
  78     int flags;
  79     int (*init) (EVP_PKEY_CTX *ctx);
  80     int (*copy) (EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src);
  81     void (*cleanup) (EVP_PKEY_CTX *ctx);
  82     int (*paramgen_init) (EVP_PKEY_CTX *ctx);
  83     int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  84     int (*keygen_init) (EVP_PKEY_CTX *ctx);
  85     int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
  86     int (*sign_init) (EVP_PKEY_CTX *ctx);
  87     int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
  88                  const unsigned char *tbs, size_t tbslen);
  89     int (*verify_init) (EVP_PKEY_CTX *ctx);
  90     int (*verify) (EVP_PKEY_CTX *ctx,
  91                    const unsigned char *sig, size_t siglen,
  92                    const unsigned char *tbs, size_t tbslen);
  93     int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
  94     int (*verify_recover) (EVP_PKEY_CTX *ctx,
  95                            unsigned char *rout, size_t *routlen,
  96                            const unsigned char *sig, size_t siglen);
  97     int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
  98     int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
  99                     EVP_MD_CTX *mctx);
 100     int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 101     int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
 102                       EVP_MD_CTX *mctx);
 103     int (*encrypt_init) (EVP_PKEY_CTX *ctx);
 104     int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 105                     const unsigned char *in, size_t inlen);
 106     int (*decrypt_init) (EVP_PKEY_CTX *ctx);
 107     int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 108                     const unsigned char *in, size_t inlen);
 109     int (*derive_init) (EVP_PKEY_CTX *ctx);
 110     int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 111     int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
 112     int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
 113     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
 114                        const unsigned char *tbs, size_t tbslen);
 115     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
 116                          size_t siglen, const unsigned char *tbs,
 117                          size_t tbslen);
 118     int (*check) (EVP_PKEY *pkey);
 119     int (*public_check) (EVP_PKEY *pkey);
 120     int (*param_check) (EVP_PKEY *pkey);
 121
 122     int (*digest_custom) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 123 } /* EVP_PKEY_METHOD */ ;
 124
 125 DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
 126
 127 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
 128
 129 const EVP_PKEY_METHOD *cmac_pkey_method(void);
 130 const EVP_PKEY_METHOD *dh_pkey_method(void);
 131 const EVP_PKEY_METHOD *dhx_pkey_method(void);
 132 const EVP_PKEY_METHOD *dsa_pkey_method(void);
 133 const EVP_PKEY_METHOD *ec_pkey_method(void);
 134 const EVP_PKEY_METHOD *sm2_pkey_method(void);
 135 const EVP_PKEY_METHOD *ecx25519_pkey_method(void);
 136 const EVP_PKEY_METHOD *ecx448_pkey_method(void);
 137 const EVP_PKEY_METHOD *ed25519_pkey_method(void);
 138 const EVP_PKEY_METHOD *ed448_pkey_method(void);
 139 const EVP_PKEY_METHOD *hmac_pkey_method(void);
 140 const EVP_PKEY_METHOD *rsa_pkey_method(void);
 141 const EVP_PKEY_METHOD *rsa_pss_pkey_method(void);
 142 const EVP_PKEY_METHOD *scrypt_pkey_method(void);
 143 const EVP_PKEY_METHOD *tls1_prf_pkey_method(void);
 144 const EVP_PKEY_METHOD *hkdf_pkey_method(void);
 145 const EVP_PKEY_METHOD *poly1305_pkey_method(void);
 146 const EVP_PKEY_METHOD *siphash_pkey_method(void);
 147
 148 struct evp_mac_st {
 149     OSSL_PROVIDER *prov;
 150     int name_id;
 151
 152     CRYPTO_REF_COUNT refcnt;
 153     CRYPTO_RWLOCK *lock;
 154
 155     OSSL_OP_mac_newctx_fn *newctx;
 156     OSSL_OP_mac_dupctx_fn *dupctx;
 157     OSSL_OP_mac_freectx_fn *freectx;
 158     OSSL_OP_mac_size_fn *size;
 159     OSSL_OP_mac_init_fn *init;
 160     OSSL_OP_mac_update_fn *update;
 161     OSSL_OP_mac_final_fn *final;
 162     OSSL_OP_mac_gettable_params_fn *gettable_params;
 163     OSSL_OP_mac_gettable_ctx_params_fn *gettable_ctx_params;
 164     OSSL_OP_mac_settable_ctx_params_fn *settable_ctx_params;
 165     OSSL_OP_mac_get_params_fn *get_params;
 166     OSSL_OP_mac_get_ctx_params_fn *get_ctx_params;
 167     OSSL_OP_mac_set_ctx_params_fn *set_ctx_params;
 168 };
 169
 170 struct evp_kdf_st {
 171     OSSL_PROVIDER *prov;
 172     int name_id;
 173     CRYPTO_REF_COUNT refcnt;
 174     CRYPTO_RWLOCK *lock;
 175
 176     OSSL_OP_kdf_newctx_fn *newctx;
 177     OSSL_OP_kdf_dupctx_fn *dupctx;
 178     OSSL_OP_kdf_freectx_fn *freectx;
 179     OSSL_OP_kdf_reset_fn *reset;
 180     OSSL_OP_kdf_derive_fn *derive;
 181     OSSL_OP_kdf_gettable_params_fn *gettable_params;
 182     OSSL_OP_kdf_gettable_ctx_params_fn *gettable_ctx_params;
 183     OSSL_OP_kdf_settable_ctx_params_fn *settable_ctx_params;
 184     OSSL_OP_kdf_get_params_fn *get_params;
 185     OSSL_OP_kdf_get_ctx_params_fn *get_ctx_params;
 186     OSSL_OP_kdf_set_ctx_params_fn *set_ctx_params;
 187 };
 188
 189 struct evp_md_st {
 190     /* nid */
 191     int type;
 192
 193     /* Legacy structure members */
 194     /* TODO(3.0): Remove these */
 195     int pkey_type;
 196     int md_size;
 197     unsigned long flags;
 198     int (*init) (EVP_MD_CTX *ctx);
 199     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
 200     int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
 201     int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
 202     int (*cleanup) (EVP_MD_CTX *ctx);
 203     int block_size;
 204     int ctx_size;               /* how big does the ctx->md_data need to be */
 205     /* control function */
 206     int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
 207
 208     /* New structure members */
 209     /* TODO(3.0): Remove above comment when legacy has gone */
 210     int name_id;
 211     OSSL_PROVIDER *prov;
 212     CRYPTO_REF_COUNT refcnt;
 213     CRYPTO_RWLOCK *lock;
 214     OSSL_OP_digest_newctx_fn *newctx;
 215     OSSL_OP_digest_init_fn *dinit;
 216     OSSL_OP_digest_update_fn *dupdate;
 217     OSSL_OP_digest_final_fn *dfinal;
 218     OSSL_OP_digest_digest_fn *digest;
 219     OSSL_OP_digest_freectx_fn *freectx;
 220     OSSL_OP_digest_dupctx_fn *dupctx;
 221     OSSL_OP_digest_get_params_fn *get_params;
 222     OSSL_OP_digest_set_ctx_params_fn *set_ctx_params;
 223     OSSL_OP_digest_get_ctx_params_fn *get_ctx_params;
 224     OSSL_OP_digest_gettable_params_fn *gettable_params;
 225     OSSL_OP_digest_settable_ctx_params_fn *settable_ctx_params;
 226     OSSL_OP_digest_gettable_ctx_params_fn *gettable_ctx_params;
 227
 228 } /* EVP_MD */ ;
 229
 230 struct evp_cipher_st {
 231     int nid;
 232
 233     int block_size;
 234     /* Default value for variable length ciphers */
 235     int key_len;
 236     int iv_len;
 237
 238     /* Legacy structure members */
 239     /* TODO(3.0): Remove these */
 240     /* Various flags */
 241     unsigned long flags;
 242     /* init key */
 243     int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
 244                  const unsigned char *iv, int enc);
 245     /* encrypt/decrypt data */
 246     int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
 247                       const unsigned char *in, size_t inl);
 248     /* cleanup ctx */
 249     int (*cleanup) (EVP_CIPHER_CTX *);
 250     /* how big ctx->cipher_data needs to be */
 251     int ctx_size;
 252     /* Populate a ASN1_TYPE with parameters */
 253     int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 254     /* Get parameters from a ASN1_TYPE */
 255     int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 256     /* Miscellaneous operations */
 257     int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
 258     /* Application data */
 259     void *app_data;
 260
 261     /* New structure members */
 262     /* TODO(3.0): Remove above comment when legacy has gone */
 263     int name_id;
 264     OSSL_PROVIDER *prov;
 265     CRYPTO_REF_COUNT refcnt;
 266     CRYPTO_RWLOCK *lock;
 267     OSSL_OP_cipher_newctx_fn *newctx;
 268     OSSL_OP_cipher_encrypt_init_fn *einit;
 269     OSSL_OP_cipher_decrypt_init_fn *dinit;
 270     OSSL_OP_cipher_update_fn *cupdate;
 271     OSSL_OP_cipher_final_fn *cfinal;
 272     OSSL_OP_cipher_cipher_fn *ccipher;
 273     OSSL_OP_cipher_freectx_fn *freectx;
 274     OSSL_OP_cipher_dupctx_fn *dupctx;
 275     OSSL_OP_cipher_get_params_fn *get_params;
 276     OSSL_OP_cipher_get_ctx_params_fn *get_ctx_params;
 277     OSSL_OP_cipher_set_ctx_params_fn *set_ctx_params;
 278     OSSL_OP_cipher_gettable_params_fn *gettable_params;
 279     OSSL_OP_cipher_gettable_ctx_params_fn *gettable_ctx_params;
 280     OSSL_OP_cipher_settable_ctx_params_fn *settable_ctx_params;
 281 } /* EVP_CIPHER */ ;
 282
 283 /* Macros to code block cipher wrappers */
 284
 285 /* Wrapper functions for each cipher mode */
 286
 287 #define EVP_C_DATA(kstruct, ctx) \
 288         ((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 289
 290 #define BLOCK_CIPHER_ecb_loop() \
 291         size_t i, bl; \
 292         bl = EVP_CIPHER_CTX_cipher(ctx)->block_size;    \
 293         if (inl < bl) return 1;\
 294         inl -= bl; \
 295         for (i=0; i <= inl; i+=bl)
 296
 297 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 298 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 299 {\
 300         BLOCK_CIPHER_ecb_loop() \
 301             cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
 302         return 1;\
 303 }
 304
 305 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
 306
 307 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 308     static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 309 {\
 310         while(inl>=EVP_MAXCHUNK) {\
 311             int num = EVP_CIPHER_CTX_num(ctx);\
 312             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 313             EVP_CIPHER_CTX_set_num(ctx, num);\
 314             inl-=EVP_MAXCHUNK;\
 315             in +=EVP_MAXCHUNK;\
 316             out+=EVP_MAXCHUNK;\
 317         }\
 318         if (inl) {\
 319             int num = EVP_CIPHER_CTX_num(ctx);\
 320             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
 321             EVP_CIPHER_CTX_set_num(ctx, num);\
 322         }\
 323         return 1;\
 324 }
 325
 326 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 327 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 328 {\
 329         while(inl>=EVP_MAXCHUNK) \
 330             {\
 331             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));\
 332             inl-=EVP_MAXCHUNK;\
 333             in +=EVP_MAXCHUNK;\
 334             out+=EVP_MAXCHUNK;\
 335             }\
 336         if (inl)\
 337             cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
 338         return 1;\
 339 }
 340
 341 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched)  \
 342 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 343 {\
 344     size_t chunk = EVP_MAXCHUNK;\
 345     if (cbits == 1)  chunk >>= 3;\
 346     if (inl < chunk) chunk = inl;\
 347     while (inl && inl >= chunk)\
 348     {\
 349         int num = EVP_CIPHER_CTX_num(ctx);\
 350         cprefix##_cfb##cbits##_encrypt(in, out, (long) \
 351             ((cbits == 1) \
 352                 && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
 353                 ? chunk*8 : chunk), \
 354             &EVP_C_DATA(kstruct, ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx),\
 355             &num, EVP_CIPHER_CTX_encrypting(ctx));\
 356         EVP_CIPHER_CTX_set_num(ctx, num);\
 357         inl -= chunk;\
 358         in += chunk;\
 359         out += chunk;\
 360         if (inl < chunk) chunk = inl;\
 361     }\
 362     return 1;\
 363 }
 364
 365 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 366         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 367         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 368         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 369         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 370
 371 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 372                           key_len, iv_len, flags, init_key, cleanup, \
 373                           set_asn1, get_asn1, ctrl) \
 374 static const EVP_CIPHER cname##_##mode = { \
 375         nid##_##nmode, block_size, key_len, iv_len, \
 376         flags | EVP_CIPH_##MODE##_MODE, \
 377         init_key, \
 378         cname##_##mode##_cipher, \
 379         cleanup, \
 380         sizeof(kstruct), \
 381         set_asn1, get_asn1,\
 382         ctrl, \
 383         NULL \
 384 }; \
 385 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 386
 387 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 388                              iv_len, flags, init_key, cleanup, set_asn1, \
 389                              get_asn1, ctrl) \
 390 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 391                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 392
 393 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 394                              iv_len, cbits, flags, init_key, cleanup, \
 395                              set_asn1, get_asn1, ctrl) \
 396 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 397                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 398                   get_asn1, ctrl)
 399
 400 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 401                              iv_len, cbits, flags, init_key, cleanup, \
 402                              set_asn1, get_asn1, ctrl) \
 403 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 404                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 405                   get_asn1, ctrl)
 406
 407 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 408                              flags, init_key, cleanup, set_asn1, \
 409                              get_asn1, ctrl) \
 410 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 411                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 412
 413 #define BLOCK_CIPHER_defs(cname, kstruct, \
 414                           nid, block_size, key_len, iv_len, cbits, flags, \
 415                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 416 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 417                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 418 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 419                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 420 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 421                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 422 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 423                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 424
 425 /*-
 426 #define BLOCK_CIPHER_defs(cname, kstruct, \
 427                                 nid, block_size, key_len, iv_len, flags,\
 428                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 429 static const EVP_CIPHER cname##_cbc = {\
 430         nid##_cbc, block_size, key_len, iv_len, \
 431         flags | EVP_CIPH_CBC_MODE,\
 432         init_key,\
 433         cname##_cbc_cipher,\
 434         cleanup,\
 435         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 436                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 437         set_asn1, get_asn1,\
 438         ctrl, \
 439         NULL \
 440 };\
 441 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 442 static const EVP_CIPHER cname##_cfb = {\
 443         nid##_cfb64, 1, key_len, iv_len, \
 444         flags | EVP_CIPH_CFB_MODE,\
 445         init_key,\
 446         cname##_cfb_cipher,\
 447         cleanup,\
 448         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 449                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 450         set_asn1, get_asn1,\
 451         ctrl,\
 452         NULL \
 453 };\
 454 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 455 static const EVP_CIPHER cname##_ofb = {\
 456         nid##_ofb64, 1, key_len, iv_len, \
 457         flags | EVP_CIPH_OFB_MODE,\
 458         init_key,\
 459         cname##_ofb_cipher,\
 460         cleanup,\
 461         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 462                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 463         set_asn1, get_asn1,\
 464         ctrl,\
 465         NULL \
 466 };\
 467 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 468 static const EVP_CIPHER cname##_ecb = {\
 469         nid##_ecb, block_size, key_len, iv_len, \
 470         flags | EVP_CIPH_ECB_MODE,\
 471         init_key,\
 472         cname##_ecb_cipher,\
 473         cleanup,\
 474         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 475                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 476         set_asn1, get_asn1,\
 477         ctrl,\
 478         NULL \
 479 };\
 480 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 481 */
 482
 483 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 484                                block_size, key_len, iv_len, cbits, \
 485                                flags, init_key, \
 486                                cleanup, set_asn1, get_asn1, ctrl) \
 487         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 488         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 489                           cbits, flags, init_key, cleanup, set_asn1, \
 490                           get_asn1, ctrl)
 491
 492 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
 493         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 494         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 495                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 496                              (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
 497                              cipher##_init_key, NULL, NULL, NULL, NULL)
 498
 499 /*
 500  * Type needs to be a bit field Sub-type needs to be for variations on the
 501  * method, as in, can it do arbitrary encryption....
 502  */
 503 struct evp_pkey_st {
 504     /* == Legacy attributes == */
 505     int type;
 506     int save_type;
 507     const EVP_PKEY_ASN1_METHOD *ameth;
 508     ENGINE *engine;
 509     ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
 510     union {
 511         void *ptr;
 512 # ifndef OPENSSL_NO_RSA
 513         struct rsa_st *rsa;     /* RSA */
 514 # endif
 515 # ifndef OPENSSL_NO_DSA
 516         struct dsa_st *dsa;     /* DSA */
 517 # endif
 518 # ifndef OPENSSL_NO_DH
 519         struct dh_st *dh;       /* DH */
 520 # endif
 521 # ifndef OPENSSL_NO_EC
 522         struct ec_key_st *ec;   /* ECC */
 523         ECX_KEY *ecx;           /* X25519, X448, Ed25519, Ed448 */
 524 # endif
 525     } pkey;
 526
 527     /* == Common attributes == */
 528     CRYPTO_REF_COUNT references;
 529     CRYPTO_RWLOCK *lock;
 530     STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
 531     int save_parameters;
 532
 533     /* == Provider attributes == */
 534     /*
 535      * To support transparent export/import between providers that support
 536      * the methods for it, and still not having to do the export/import
 537      * every time a key object is changed, we maintain a cache of imported
 538      * key objects, indexed by keymgmt address.  pkeys[0] is *always* the
 539      * "original" data unless we have a legacy key attached.
 540      */
 541     struct {
 542         EVP_KEYMGMT *keymgmt;
 543         void *keydata;
 544     } pkeys[10];
 545     /*
 546      * If there is a legacy key assigned to this structure, we keep
 547      * a copy of that key's dirty count.
 548      */
 549     size_t dirty_cnt_copy;
 550
 551     /* Cache of key object information */
 552     struct {
 553         int bits;
 554         int security_bits;
 555         int size;
 556     } cache;
 557 } /* EVP_PKEY */ ;
 558
 559 #define EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) \
 560     ((ctx)->operation == EVP_PKEY_OP_SIGN \
 561      || (ctx)->operation == EVP_PKEY_OP_SIGNCTX \
 562      || (ctx)->operation == EVP_PKEY_OP_VERIFY \
 563      || (ctx)->operation == EVP_PKEY_OP_VERIFYCTX \
 564      || (ctx)->operation == EVP_PKEY_OP_VERIFYRECOVER)
 565
 566 #define EVP_PKEY_CTX_IS_DERIVE_OP(ctx) \
 567     ((ctx)->operation == EVP_PKEY_OP_DERIVE)
 568
 569 #define EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) \
 570     ((ctx)->operation == EVP_PKEY_OP_ENCRYPT \
 571      || (ctx)->operation == EVP_PKEY_OP_DECRYPT)
 572
 573 void openssl_add_all_ciphers_int(void);
 574 void openssl_add_all_digests_int(void);
 575 void evp_cleanup_int(void);
 576 void evp_app_cleanup_int(void);
 577
 578 /*
 579  * KEYMGMT utility functions
 580  */
 581 void *evp_keymgmt_util_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt);
 582 void evp_keymgmt_util_clear_pkey_cache(EVP_PKEY *pk);
 583 void evp_keymgmt_util_cache_pkey(EVP_PKEY *pk, size_t index,
 584                                  EVP_KEYMGMT *keymgmt, void *keydata);
 585 void *evp_keymgmt_util_fromdata(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
 586                                 int selection, const OSSL_PARAM params[]);
 587
 588
 589 /*
 590  * KEYMGMT provider interface functions
 591  */
 592 void *evp_keymgmt_newdata(const EVP_KEYMGMT *keymgmt);
 593 void evp_keymgmt_freedata(const EVP_KEYMGMT *keymgmt, void *keyddata);
 594 int evp_keymgmt_get_params(const EVP_KEYMGMT *keymgmt,
 595                            void *keydata, OSSL_PARAM params[]);
 596 const OSSL_PARAM *evp_keymgmt_gettable_params(const EVP_KEYMGMT *keymgmt);
 597
 598
 599 int evp_keymgmt_has(const EVP_KEYMGMT *keymgmt, void *keyddata, int selection);
 600 int evp_keymgmt_validate(const EVP_KEYMGMT *keymgmt, void *keydata,
 601                          int selection);
 602
 603 int evp_keymgmt_import(const EVP_KEYMGMT *keymgmt, void *keydata,
 604                        int selection, const OSSL_PARAM params[]);
 605 const OSSL_PARAM *evp_keymgmt_import_types(const EVP_KEYMGMT *keymgmt,
 606                                            int selection);
 607 int evp_keymgmt_export(const EVP_KEYMGMT *keymgmt, void *keydata,
 608                        int selection, OSSL_CALLBACK *param_cb, void *cbarg);
 609 const OSSL_PARAM *evp_keymgmt_export_types(const EVP_KEYMGMT *keymgmt,
 610                                            int selection);
 611
 612 /* Pulling defines out of C source files */
 613
 614 #define EVP_RC4_KEY_SIZE 16
 615 #ifndef TLS1_1_VERSION
 616 # define TLS1_1_VERSION   0x0302
 617 #endif
 618
 619 void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags);
 620
 621 /* EVP_ENCODE_CTX flags */
 622 /* Don't generate new lines when encoding */
 623 #define EVP_ENCODE_CTX_NO_NEWLINES          1
 624 /* Use the SRP base64 alphabet instead of the standard one */
 625 #define EVP_ENCODE_CTX_USE_SRP_ALPHABET     2
 626
 627 const EVP_CIPHER *evp_get_cipherbyname_ex(OPENSSL_CTX *libctx, const char *name);
 628 const EVP_MD *evp_get_digestbyname_ex(OPENSSL_CTX *libctx, const char *name);
 629