include/crypto/evp.h

   1 /*
   2  * Copyright 2015-2020 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_dispatch.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 /*
  22  * An EVP_PKEY can have the following support states:
  23  *
  24  * Supports legacy implementations only:
  25  *
  26  *      engine != NULL || keytype == NULL
  27  *
  28  * Supports provided implementations:
  29  *
  30  *      engine == NULL && keytype != NULL
  31  */
  32 #define evp_pkey_ctx_is_legacy(ctx)                             \
  33     ((ctx)->engine != NULL || (ctx)->keytype == NULL)
  34 #define evp_pkey_ctx_is_provided(ctx)                           \
  35     (!evp_pkey_ctx_is_legacy(ctx))
  36
  37 struct evp_pkey_ctx_st {
  38     /* Actual operation */
  39     int operation;
  40
  41     /*
  42      * Library context, property query, keytype and keymgmt associated with
  43      * this context
  44      */
  45     OSSL_LIB_CTX *libctx;
  46     char *propquery;
  47     const char *keytype;
  48     EVP_KEYMGMT *keymgmt;
  49
  50     union {
  51         struct {
  52             void *genctx;
  53         } keymgmt;
  54
  55         struct {
  56             EVP_KEYEXCH *exchange;
  57             void *exchprovctx;
  58         } kex;
  59
  60         struct {
  61             EVP_SIGNATURE *signature;
  62             void *sigprovctx;
  63         } sig;
  64
  65         struct {
  66             EVP_ASYM_CIPHER *cipher;
  67             void *ciphprovctx;
  68         } ciph;
  69         struct {
  70             EVP_KEM *kem;
  71             void *kemprovctx;
  72         } encap;
  73     } op;
  74
  75     /*
  76      * Cached parameters.  Inits of operations that depend on these should
  77      * call evp_pkey_ctx_use_delayed_data() when the operation has been set
  78      * up properly.
  79      */
  80     struct {
  81         /* Distinguishing Identifier, ISO/IEC 15946-3, FIPS 196 */
  82         char *dist_id_name; /* The name used with EVP_PKEY_CTX_ctrl_str() */
  83         void *dist_id;      /* The distinguishing ID itself */
  84         size_t dist_id_len; /* The length of the distinguishing ID */
  85
  86         /* Indicators of what has been set.  Keep them together! */
  87         unsigned int dist_id_set : 1;
  88     } cached_parameters;
  89
  90     /* Application specific data, usually used by the callback */
  91     void *app_data;
  92     /* Keygen callback */
  93     EVP_PKEY_gen_cb *pkey_gencb;
  94     /* implementation specific keygen data */
  95     int *keygen_info;
  96     int keygen_info_count;
  97
  98     /* Legacy fields below */
  99
 100     /* EVP_PKEY identity */
 101     int legacy_keytype;
 102     /* Method associated with this operation */
 103     const EVP_PKEY_METHOD *pmeth;
 104     /* Engine that implements this method or NULL if builtin */
 105     ENGINE *engine;
 106     /* Key: may be NULL */
 107     EVP_PKEY *pkey;
 108     /* Peer key for key agreement, may be NULL */
 109     EVP_PKEY *peerkey;
 110     /* Algorithm specific data */
 111     void *data;
 112     /* Indicator if digest_custom needs to be called */
 113     unsigned int flag_call_digest_custom:1;
 114     /*
 115      * Used to support taking custody of memory in the case of a provider being
 116      * used with the deprecated EVP_PKEY_CTX_set_rsa_keygen_pubexp() API. This
 117      * member should NOT be used for any other purpose and should be removed
 118      * when said deprecated API is excised completely.
 119      */
 120     BIGNUM *rsa_pubexp;
 121 } /* EVP_PKEY_CTX */ ;
 122
 123 #define EVP_PKEY_FLAG_DYNAMIC   1
 124
 125 struct evp_pkey_method_st {
 126     int pkey_id;
 127     int flags;
 128     int (*init) (EVP_PKEY_CTX *ctx);
 129     int (*copy) (EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src);
 130     void (*cleanup) (EVP_PKEY_CTX *ctx);
 131     int (*paramgen_init) (EVP_PKEY_CTX *ctx);
 132     int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
 133     int (*keygen_init) (EVP_PKEY_CTX *ctx);
 134     int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
 135     int (*sign_init) (EVP_PKEY_CTX *ctx);
 136     int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 137                  const unsigned char *tbs, size_t tbslen);
 138     int (*verify_init) (EVP_PKEY_CTX *ctx);
 139     int (*verify) (EVP_PKEY_CTX *ctx,
 140                    const unsigned char *sig, size_t siglen,
 141                    const unsigned char *tbs, size_t tbslen);
 142     int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
 143     int (*verify_recover) (EVP_PKEY_CTX *ctx,
 144                            unsigned char *rout, size_t *routlen,
 145                            const unsigned char *sig, size_t siglen);
 146     int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 147     int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 148                     EVP_MD_CTX *mctx);
 149     int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 150     int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
 151                       EVP_MD_CTX *mctx);
 152     int (*encrypt_init) (EVP_PKEY_CTX *ctx);
 153     int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 154                     const unsigned char *in, size_t inlen);
 155     int (*decrypt_init) (EVP_PKEY_CTX *ctx);
 156     int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
 157                     const unsigned char *in, size_t inlen);
 158     int (*derive_init) (EVP_PKEY_CTX *ctx);
 159     int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 160     int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
 161     int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
 162     int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
 163                        const unsigned char *tbs, size_t tbslen);
 164     int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
 165                          size_t siglen, const unsigned char *tbs,
 166                          size_t tbslen);
 167     int (*check) (EVP_PKEY *pkey);
 168     int (*public_check) (EVP_PKEY *pkey);
 169     int (*param_check) (EVP_PKEY *pkey);
 170
 171     int (*digest_custom) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
 172 } /* EVP_PKEY_METHOD */ ;
 173
 174 DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
 175
 176 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
 177
 178 const EVP_PKEY_METHOD *dh_pkey_method(void);
 179 const EVP_PKEY_METHOD *dhx_pkey_method(void);
 180 const EVP_PKEY_METHOD *dsa_pkey_method(void);
 181 const EVP_PKEY_METHOD *ec_pkey_method(void);
 182 const EVP_PKEY_METHOD *ecx25519_pkey_method(void);
 183 const EVP_PKEY_METHOD *ecx448_pkey_method(void);
 184 const EVP_PKEY_METHOD *ed25519_pkey_method(void);
 185 const EVP_PKEY_METHOD *ed448_pkey_method(void);
 186 const EVP_PKEY_METHOD *ossl_rsa_pkey_method(void);
 187 const EVP_PKEY_METHOD *ossl_rsa_pss_pkey_method(void);
 188
 189 struct evp_mac_st {
 190     OSSL_PROVIDER *prov;
 191     int name_id;
 192
 193     CRYPTO_REF_COUNT refcnt;
 194     CRYPTO_RWLOCK *lock;
 195
 196     OSSL_FUNC_mac_newctx_fn *newctx;
 197     OSSL_FUNC_mac_dupctx_fn *dupctx;
 198     OSSL_FUNC_mac_freectx_fn *freectx;
 199     OSSL_FUNC_mac_size_fn *size;
 200     OSSL_FUNC_mac_init_fn *init;
 201     OSSL_FUNC_mac_update_fn *update;
 202     OSSL_FUNC_mac_final_fn *final;
 203     OSSL_FUNC_mac_gettable_params_fn *gettable_params;
 204     OSSL_FUNC_mac_gettable_ctx_params_fn *gettable_ctx_params;
 205     OSSL_FUNC_mac_settable_ctx_params_fn *settable_ctx_params;
 206     OSSL_FUNC_mac_get_params_fn *get_params;
 207     OSSL_FUNC_mac_get_ctx_params_fn *get_ctx_params;
 208     OSSL_FUNC_mac_set_ctx_params_fn *set_ctx_params;
 209 };
 210
 211 struct evp_kdf_st {
 212     OSSL_PROVIDER *prov;
 213     int name_id;
 214     CRYPTO_REF_COUNT refcnt;
 215     CRYPTO_RWLOCK *lock;
 216
 217     OSSL_FUNC_kdf_newctx_fn *newctx;
 218     OSSL_FUNC_kdf_dupctx_fn *dupctx;
 219     OSSL_FUNC_kdf_freectx_fn *freectx;
 220     OSSL_FUNC_kdf_reset_fn *reset;
 221     OSSL_FUNC_kdf_derive_fn *derive;
 222     OSSL_FUNC_kdf_gettable_params_fn *gettable_params;
 223     OSSL_FUNC_kdf_gettable_ctx_params_fn *gettable_ctx_params;
 224     OSSL_FUNC_kdf_settable_ctx_params_fn *settable_ctx_params;
 225     OSSL_FUNC_kdf_get_params_fn *get_params;
 226     OSSL_FUNC_kdf_get_ctx_params_fn *get_ctx_params;
 227     OSSL_FUNC_kdf_set_ctx_params_fn *set_ctx_params;
 228 };
 229
 230 struct evp_md_st {
 231     /* nid */
 232     int type;
 233
 234     /* Legacy structure members */
 235     /* TODO(3.0): Remove these */
 236     int pkey_type;
 237     int md_size;
 238     unsigned long flags;
 239     int (*init) (EVP_MD_CTX *ctx);
 240     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
 241     int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
 242     int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
 243     int (*cleanup) (EVP_MD_CTX *ctx);
 244     int block_size;
 245     int ctx_size;               /* how big does the ctx->md_data need to be */
 246     /* control function */
 247     int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
 248
 249     /* New structure members */
 250     /* TODO(3.0): Remove above comment when legacy has gone */
 251     int name_id;
 252     OSSL_PROVIDER *prov;
 253     CRYPTO_REF_COUNT refcnt;
 254     CRYPTO_RWLOCK *lock;
 255     OSSL_FUNC_digest_newctx_fn *newctx;
 256     OSSL_FUNC_digest_init_fn *dinit;
 257     OSSL_FUNC_digest_update_fn *dupdate;
 258     OSSL_FUNC_digest_final_fn *dfinal;
 259     OSSL_FUNC_digest_digest_fn *digest;
 260     OSSL_FUNC_digest_freectx_fn *freectx;
 261     OSSL_FUNC_digest_dupctx_fn *dupctx;
 262     OSSL_FUNC_digest_get_params_fn *get_params;
 263     OSSL_FUNC_digest_set_ctx_params_fn *set_ctx_params;
 264     OSSL_FUNC_digest_get_ctx_params_fn *get_ctx_params;
 265     OSSL_FUNC_digest_gettable_params_fn *gettable_params;
 266     OSSL_FUNC_digest_settable_ctx_params_fn *settable_ctx_params;
 267     OSSL_FUNC_digest_gettable_ctx_params_fn *gettable_ctx_params;
 268
 269 } /* EVP_MD */ ;
 270
 271 struct evp_cipher_st {
 272     int nid;
 273
 274     int block_size;
 275     /* Default value for variable length ciphers */
 276     int key_len;
 277     int iv_len;
 278
 279     /* Legacy structure members */
 280     /* TODO(3.0): Remove these */
 281     /* Various flags */
 282     unsigned long flags;
 283     /* init key */
 284     int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
 285                  const unsigned char *iv, int enc);
 286     /* encrypt/decrypt data */
 287     int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
 288                       const unsigned char *in, size_t inl);
 289     /* cleanup ctx */
 290     int (*cleanup) (EVP_CIPHER_CTX *);
 291     /* how big ctx->cipher_data needs to be */
 292     int ctx_size;
 293     /* Populate a ASN1_TYPE with parameters */
 294     int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 295     /* Get parameters from a ASN1_TYPE */
 296     int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 297     /* Miscellaneous operations */
 298     int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
 299     /* Application data */
 300     void *app_data;
 301
 302     /* New structure members */
 303     /* TODO(3.0): Remove above comment when legacy has gone */
 304     int name_id;
 305     OSSL_PROVIDER *prov;
 306     CRYPTO_REF_COUNT refcnt;
 307     CRYPTO_RWLOCK *lock;
 308     OSSL_FUNC_cipher_newctx_fn *newctx;
 309     OSSL_FUNC_cipher_encrypt_init_fn *einit;
 310     OSSL_FUNC_cipher_decrypt_init_fn *dinit;
 311     OSSL_FUNC_cipher_update_fn *cupdate;
 312     OSSL_FUNC_cipher_final_fn *cfinal;
 313     OSSL_FUNC_cipher_cipher_fn *ccipher;
 314     OSSL_FUNC_cipher_freectx_fn *freectx;
 315     OSSL_FUNC_cipher_dupctx_fn *dupctx;
 316     OSSL_FUNC_cipher_get_params_fn *get_params;
 317     OSSL_FUNC_cipher_get_ctx_params_fn *get_ctx_params;
 318     OSSL_FUNC_cipher_set_ctx_params_fn *set_ctx_params;
 319     OSSL_FUNC_cipher_gettable_params_fn *gettable_params;
 320     OSSL_FUNC_cipher_gettable_ctx_params_fn *gettable_ctx_params;
 321     OSSL_FUNC_cipher_settable_ctx_params_fn *settable_ctx_params;
 322 } /* EVP_CIPHER */ ;
 323
 324 /* Macros to code block cipher wrappers */
 325
 326 /* Wrapper functions for each cipher mode */
 327
 328 #define EVP_C_DATA(kstruct, ctx) \
 329         ((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 330
 331 #define BLOCK_CIPHER_ecb_loop() \
 332         size_t i, bl; \
 333         bl = EVP_CIPHER_CTX_cipher(ctx)->block_size;    \
 334         if (inl < bl) return 1;\
 335         inl -= bl; \
 336         for (i=0; i <= inl; i+=bl)
 337
 338 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 339 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 340 {\
 341         BLOCK_CIPHER_ecb_loop() \
 342             cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
 343         return 1;\
 344 }
 345
 346 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
 347
 348 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 349     static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 350 {\
 351         while(inl>=EVP_MAXCHUNK) {\
 352             int num = EVP_CIPHER_CTX_num(ctx);\
 353             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
 354             EVP_CIPHER_CTX_set_num(ctx, num);\
 355             inl-=EVP_MAXCHUNK;\
 356             in +=EVP_MAXCHUNK;\
 357             out+=EVP_MAXCHUNK;\
 358         }\
 359         if (inl) {\
 360             int num = EVP_CIPHER_CTX_num(ctx);\
 361             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
 362             EVP_CIPHER_CTX_set_num(ctx, num);\
 363         }\
 364         return 1;\
 365 }
 366
 367 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 368 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 369 {\
 370         while(inl>=EVP_MAXCHUNK) \
 371             {\
 372             cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_encrypting(ctx));\
 373             inl-=EVP_MAXCHUNK;\
 374             in +=EVP_MAXCHUNK;\
 375             out+=EVP_MAXCHUNK;\
 376             }\
 377         if (inl)\
 378             cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_encrypting(ctx));\
 379         return 1;\
 380 }
 381
 382 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched)  \
 383 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 384 {\
 385     size_t chunk = EVP_MAXCHUNK;\
 386     if (cbits == 1)  chunk >>= 3;\
 387     if (inl < chunk) chunk = inl;\
 388     while (inl && inl >= chunk)\
 389     {\
 390         int num = EVP_CIPHER_CTX_num(ctx);\
 391         cprefix##_cfb##cbits##_encrypt(in, out, (long) \
 392             ((cbits == 1) \
 393                 && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
 394                 ? chunk*8 : chunk), \
 395             &EVP_C_DATA(kstruct, ctx)->ksched, ctx->iv,\
 396             &num, EVP_CIPHER_CTX_encrypting(ctx));\
 397         EVP_CIPHER_CTX_set_num(ctx, num);\
 398         inl -= chunk;\
 399         in += chunk;\
 400         out += chunk;\
 401         if (inl < chunk) chunk = inl;\
 402     }\
 403     return 1;\
 404 }
 405
 406 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 407         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 408         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 409         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 410         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 411
 412 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 413                           key_len, iv_len, flags, init_key, cleanup, \
 414                           set_asn1, get_asn1, ctrl) \
 415 static const EVP_CIPHER cname##_##mode = { \
 416         nid##_##nmode, block_size, key_len, iv_len, \
 417         flags | EVP_CIPH_##MODE##_MODE, \
 418         init_key, \
 419         cname##_##mode##_cipher, \
 420         cleanup, \
 421         sizeof(kstruct), \
 422         set_asn1, get_asn1,\
 423         ctrl, \
 424         NULL \
 425 }; \
 426 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 427
 428 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 429                              iv_len, flags, init_key, cleanup, set_asn1, \
 430                              get_asn1, ctrl) \
 431 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 432                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 433
 434 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 435                              iv_len, cbits, flags, init_key, cleanup, \
 436                              set_asn1, get_asn1, ctrl) \
 437 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 438                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 439                   get_asn1, ctrl)
 440
 441 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 442                              iv_len, cbits, flags, init_key, cleanup, \
 443                              set_asn1, get_asn1, ctrl) \
 444 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 445                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 446                   get_asn1, ctrl)
 447
 448 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 449                              flags, init_key, cleanup, set_asn1, \
 450                              get_asn1, ctrl) \
 451 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 452                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 453
 454 #define BLOCK_CIPHER_defs(cname, kstruct, \
 455                           nid, block_size, key_len, iv_len, cbits, flags, \
 456                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 457 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 458                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 459 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 460                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 461 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 462                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 463 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 464                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 465
 466 /*-
 467 #define BLOCK_CIPHER_defs(cname, kstruct, \
 468                                 nid, block_size, key_len, iv_len, flags,\
 469                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 470 static const EVP_CIPHER cname##_cbc = {\
 471         nid##_cbc, block_size, key_len, iv_len, \
 472         flags | EVP_CIPH_CBC_MODE,\
 473         init_key,\
 474         cname##_cbc_cipher,\
 475         cleanup,\
 476         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 477                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 478         set_asn1, get_asn1,\
 479         ctrl, \
 480         NULL \
 481 };\
 482 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 483 static const EVP_CIPHER cname##_cfb = {\
 484         nid##_cfb64, 1, key_len, iv_len, \
 485         flags | EVP_CIPH_CFB_MODE,\
 486         init_key,\
 487         cname##_cfb_cipher,\
 488         cleanup,\
 489         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 490                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 491         set_asn1, get_asn1,\
 492         ctrl,\
 493         NULL \
 494 };\
 495 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 496 static const EVP_CIPHER cname##_ofb = {\
 497         nid##_ofb64, 1, key_len, iv_len, \
 498         flags | EVP_CIPH_OFB_MODE,\
 499         init_key,\
 500         cname##_ofb_cipher,\
 501         cleanup,\
 502         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 503                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 504         set_asn1, get_asn1,\
 505         ctrl,\
 506         NULL \
 507 };\
 508 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 509 static const EVP_CIPHER cname##_ecb = {\
 510         nid##_ecb, block_size, key_len, iv_len, \
 511         flags | EVP_CIPH_ECB_MODE,\
 512         init_key,\
 513         cname##_ecb_cipher,\
 514         cleanup,\
 515         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 516                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 517         set_asn1, get_asn1,\
 518         ctrl,\
 519         NULL \
 520 };\
 521 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 522 */
 523
 524 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 525                                block_size, key_len, iv_len, cbits, \
 526                                flags, init_key, \
 527                                cleanup, set_asn1, get_asn1, ctrl) \
 528         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 529         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 530                           cbits, flags, init_key, cleanup, set_asn1, \
 531                           get_asn1, ctrl)
 532
 533 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
 534         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 535         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 536                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 537                              (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
 538                              cipher##_init_key, NULL, NULL, NULL, NULL)
 539
 540 typedef struct {
 541     unsigned char iv[EVP_MAX_IV_LENGTH];
 542     unsigned int iv_len;
 543     unsigned int tag_len;
 544 } evp_cipher_aead_asn1_params;
 545
 546 int evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 547                                 evp_cipher_aead_asn1_params *params);
 548
 549 int evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 550                                 evp_cipher_aead_asn1_params *params);
 551
 552 /*
 553  * An EVP_PKEY can have the following states:
 554  *
 555  * untyped & empty:
 556  *
 557  *     type == EVP_PKEY_NONE && keymgmt == NULL
 558  *
 559  * typed & empty:
 560  *
 561  *     (type != EVP_PKEY_NONE && pkey.ptr == NULL)      ## legacy (libcrypto only)
 562  *     || (keymgmt != NULL && keydata == NULL)          ## provider side
 563  *
 564  * fully assigned:
 565  *
 566  *     (type != EVP_PKEY_NONE && pkey.ptr != NULL)      ## legacy (libcrypto only)
 567  *     || (keymgmt != NULL && keydata != NULL)          ## provider side
 568  *
 569  * The easiest way to detect a legacy key is:
 570  *
 571  *     keymgmt == NULL && type != EVP_PKEY_NONE
 572  *
 573  * The easiest way to detect a provider side key is:
 574  *
 575  *     keymgmt != NULL
 576  */
 577 #define evp_pkey_is_blank(pk)                                   \
 578     ((pk)->type == EVP_PKEY_NONE && (pk)->keymgmt == NULL)
 579 #define evp_pkey_is_typed(pk)                                   \
 580     ((pk)->type != EVP_PKEY_NONE || (pk)->keymgmt != NULL)
 581 #define evp_pkey_is_assigned(pk)                                \
 582     ((pk)->pkey.ptr != NULL || (pk)->keydata != NULL)
 583 #define evp_pkey_is_legacy(pk)                                  \
 584     ((pk)->type != EVP_PKEY_NONE && (pk)->keymgmt == NULL)
 585 #define evp_pkey_is_provided(pk)                                \
 586     ((pk)->keymgmt != NULL)
 587
 588 struct evp_pkey_st {
 589     /* == Legacy attributes == */
 590     int type;
 591     int save_type;
 592
 593 # ifndef FIPS_MODULE
 594     /*
 595      * Legacy key "origin" is composed of a pointer to an EVP_PKEY_ASN1_METHOD,
 596      * a pointer to a low level key and possibly a pointer to an engine.
 597      */
 598     const EVP_PKEY_ASN1_METHOD *ameth;
 599     ENGINE *engine;
 600     ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
 601     union {
 602         void *ptr;
 603 #  ifndef OPENSSL_NO_RSA
 604         struct rsa_st *rsa;     /* RSA */
 605 #  endif
 606 #  ifndef OPENSSL_NO_DSA
 607         struct dsa_st *dsa;     /* DSA */
 608 #  endif
 609 #  ifndef OPENSSL_NO_DH
 610         struct dh_st *dh;       /* DH */
 611 #  endif
 612 #  ifndef OPENSSL_NO_EC
 613         struct ec_key_st *ec;   /* ECC */
 614         ECX_KEY *ecx;           /* X25519, X448, Ed25519, Ed448 */
 615 #  endif
 616     } pkey;
 617 # endif
 618
 619     /* == Common attributes == */
 620     /* If these are modified, so must evp_pkey_downgrade() */
 621     CRYPTO_REF_COUNT references;
 622     CRYPTO_RWLOCK *lock;
 623     STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
 624     int save_parameters;
 625 #ifndef FIPS_MODULE
 626     CRYPTO_EX_DATA ex_data;
 627 #endif
 628
 629     /* == Provider attributes == */
 630
 631     /*
 632      * Provider keydata "origin" is composed of a pointer to an EVP_KEYMGMT
 633      * and a pointer to the provider side key data.  This is never used at
 634      * the same time as the legacy key data above.
 635      */
 636     EVP_KEYMGMT *keymgmt;
 637     void *keydata;
 638     /*
 639      * If any libcrypto code does anything that may modify the keydata
 640      * contents, this dirty counter must be incremented.
 641      */
 642     size_t dirty_cnt;
 643
 644     /*
 645      * To support transparent execution of operation in backends other
 646      * than the "origin" key, we support transparent export/import to
 647      * those providers, and maintain a cache of the imported keydata,
 648      * so we don't need to redo the export/import every time we perform
 649      * the same operation in that same provider.
 650      * This requires that the "origin" backend (whether it's a legacy or a
 651      * provider "origin") implements exports, and that the target provider
 652      * has an EVP_KEYMGMT that implements import.
 653      *
 654      * The cache limit is set at 10 different providers using the same
 655      * "origin".  It's probably over the top, but is preferable to too
 656      * few.
 657      */
 658     struct {
 659         EVP_KEYMGMT *keymgmt;
 660         void *keydata;
 661     } operation_cache[10];
 662     /*
 663      * We keep a copy of that "origin"'s dirty count, so we know if the
 664      * operation cache needs flushing.
 665      */
 666     size_t dirty_cnt_copy;
 667
 668     /* Cache of key object information */
 669     struct {
 670         int bits;
 671         int security_bits;
 672         int size;
 673     } cache;
 674 } /* EVP_PKEY */ ;
 675
 676 #define EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) \
 677     ((ctx)->operation == EVP_PKEY_OP_SIGN \
 678      || (ctx)->operation == EVP_PKEY_OP_SIGNCTX \
 679      || (ctx)->operation == EVP_PKEY_OP_VERIFY \
 680      || (ctx)->operation == EVP_PKEY_OP_VERIFYCTX \
 681      || (ctx)->operation == EVP_PKEY_OP_VERIFYRECOVER)
 682
 683 #define EVP_PKEY_CTX_IS_DERIVE_OP(ctx) \
 684     ((ctx)->operation == EVP_PKEY_OP_DERIVE)
 685
 686 #define EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) \
 687     ((ctx)->operation == EVP_PKEY_OP_ENCRYPT \
 688      || (ctx)->operation == EVP_PKEY_OP_DECRYPT)
 689
 690 #define EVP_PKEY_CTX_IS_GEN_OP(ctx) \
 691     ((ctx)->operation == EVP_PKEY_OP_PARAMGEN \
 692      || (ctx)->operation == EVP_PKEY_OP_KEYGEN)
 693
 694 #define EVP_PKEY_CTX_IS_KEM_OP(ctx) \
 695     ((ctx)->operation == EVP_PKEY_OP_ENCAPSULATE \
 696      || (ctx)->operation == EVP_PKEY_OP_DECAPSULATE)
 697
 698 void openssl_add_all_ciphers_int(void);
 699 void openssl_add_all_digests_int(void);
 700 void evp_cleanup_int(void);
 701 void evp_app_cleanup_int(void);
 702 void *evp_pkey_export_to_provider(EVP_PKEY *pk, OSSL_LIB_CTX *libctx,
 703                                   EVP_KEYMGMT **keymgmt,
 704                                   const char *propquery);
 705 #ifndef FIPS_MODULE
 706 int evp_pkey_copy_downgraded(EVP_PKEY **dest, const EVP_PKEY *src);
 707 int evp_pkey_downgrade(EVP_PKEY *pk);
 708 void evp_pkey_free_legacy(EVP_PKEY *x);
 709 #endif
 710
 711 /*
 712  * KEYMGMT utility functions
 713  */
 714
 715 /*
 716  * Key import structure and helper function, to be used as an export callback
 717  */
 718 struct evp_keymgmt_util_try_import_data_st {
 719     EVP_KEYMGMT *keymgmt;
 720     void *keydata;
 721
 722     int selection;
 723 };
 724 int evp_keymgmt_util_try_import(const OSSL_PARAM params[], void *arg);
 725 int evp_keymgmt_util_assign_pkey(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt,
 726                                  void *keydata);
 727 EVP_PKEY *evp_keymgmt_util_make_pkey(EVP_KEYMGMT *keymgmt, void *keydata);
 728
 729 int evp_keymgmt_util_export(const EVP_PKEY *pk, int selection,
 730                             OSSL_CALLBACK *export_cb, void *export_cbarg);
 731 void *evp_keymgmt_util_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt);
 732 size_t evp_keymgmt_util_find_operation_cache_index(EVP_PKEY *pk,
 733                                                    EVP_KEYMGMT *keymgmt);
 734 void evp_keymgmt_util_clear_operation_cache(EVP_PKEY *pk);
 735 int evp_keymgmt_util_cache_keydata(EVP_PKEY *pk, size_t index,
 736                                    EVP_KEYMGMT *keymgmt, void *keydata);
 737 void evp_keymgmt_util_cache_keyinfo(EVP_PKEY *pk);
 738 void *evp_keymgmt_util_fromdata(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
 739                                 int selection, const OSSL_PARAM params[]);
 740 int evp_keymgmt_util_has(EVP_PKEY *pk, int selection);
 741 int evp_keymgmt_util_match(EVP_PKEY *pk1, EVP_PKEY *pk2, int selection);
 742 int evp_keymgmt_util_copy(EVP_PKEY *to, EVP_PKEY *from, int selection);
 743 void *evp_keymgmt_util_gen(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
 744                            void *genctx, OSSL_CALLBACK *cb, void *cbarg);
 745 int evp_keymgmt_util_get_deflt_digest_name(EVP_KEYMGMT *keymgmt,
 746                                            void *keydata,
 747                                            char *mdname, size_t mdname_sz);
 748
 749 /*
 750  * KEYMGMT provider interface functions
 751  */
 752 void *evp_keymgmt_newdata(const EVP_KEYMGMT *keymgmt);
 753 void evp_keymgmt_freedata(const EVP_KEYMGMT *keymgmt, void *keyddata);
 754 int evp_keymgmt_get_params(const EVP_KEYMGMT *keymgmt,
 755                            void *keydata, OSSL_PARAM params[]);
 756 int evp_keymgmt_set_params(const EVP_KEYMGMT *keymgmt,
 757                            void *keydata, const OSSL_PARAM params[]);
 758 void *evp_keymgmt_gen_init(const EVP_KEYMGMT *keymgmt, int selection);
 759 int evp_keymgmt_gen_set_template(const EVP_KEYMGMT *keymgmt, void *genctx,
 760                                  void *template);
 761 int evp_keymgmt_gen_set_params(const EVP_KEYMGMT *keymgmt, void *genctx,
 762                                const OSSL_PARAM params[]);
 763 void *evp_keymgmt_gen(const EVP_KEYMGMT *keymgmt, void *genctx,
 764                       OSSL_CALLBACK *cb, void *cbarg);
 765 void evp_keymgmt_gen_cleanup(const EVP_KEYMGMT *keymgmt, void *genctx);
 766
 767 void *evp_keymgmt_load(const EVP_KEYMGMT *keymgmt,
 768                        const void *objref, size_t objref_sz);
 769
 770 int evp_keymgmt_has(const EVP_KEYMGMT *keymgmt, void *keyddata, int selection);
 771 int evp_keymgmt_validate(const EVP_KEYMGMT *keymgmt, void *keydata,
 772                          int selection);
 773 int evp_keymgmt_match(const EVP_KEYMGMT *keymgmt,
 774                       const void *keydata1, const void *keydata2,
 775                       int selection);
 776
 777 int evp_keymgmt_import(const EVP_KEYMGMT *keymgmt, void *keydata,
 778                        int selection, const OSSL_PARAM params[]);
 779 const OSSL_PARAM *evp_keymgmt_import_types(const EVP_KEYMGMT *keymgmt,
 780                                            int selection);
 781 int evp_keymgmt_export(const EVP_KEYMGMT *keymgmt, void *keydata,
 782                        int selection, OSSL_CALLBACK *param_cb, void *cbarg);
 783 const OSSL_PARAM *evp_keymgmt_export_types(const EVP_KEYMGMT *keymgmt,
 784                                            int selection);
 785 int evp_keymgmt_copy(const EVP_KEYMGMT *keymgmt,
 786                      void *keydata_to, const void *keydata_from,
 787                      int selection);
 788
 789 /* Pulling defines out of C source files */
 790
 791 #define EVP_RC4_KEY_SIZE 16
 792 #ifndef TLS1_1_VERSION
 793 # define TLS1_1_VERSION   0x0302
 794 #endif
 795
 796 void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags);
 797
 798 /* EVP_ENCODE_CTX flags */
 799 /* Don't generate new lines when encoding */
 800 #define EVP_ENCODE_CTX_NO_NEWLINES          1
 801 /* Use the SRP base64 alphabet instead of the standard one */
 802 #define EVP_ENCODE_CTX_USE_SRP_ALPHABET     2
 803
 804 const EVP_CIPHER *evp_get_cipherbyname_ex(OSSL_LIB_CTX *libctx,
 805                                           const char *name);
 806 const EVP_MD *evp_get_digestbyname_ex(OSSL_LIB_CTX *libctx,
 807                                       const char *name);
 808
 809 int pkcs5_pbkdf2_hmac_ex(const char *pass, int passlen,
 810                          const unsigned char *salt, int saltlen, int iter,
 811                          const EVP_MD *digest, int keylen, unsigned char *out,
 812                          OSSL_LIB_CTX *libctx, const char *propq);
 813
 814 #ifndef FIPS_MODULE
 815 /*
 816  * Internal helpers for stricter EVP_PKEY_CTX_{set,get}_params().
 817  *
 818  * Return 1 on success, 0 or negative for errors.
 819  *
 820  * In particular they return -2 if any of the params is not supported.
 821  *
 822  * They are not available in FIPS_MODULE as they depend on
 823  *      - EVP_PKEY_CTX_{get,set}_params()
 824  *      - EVP_PKEY_CTX_{gettable,settable}_params()
 825  *
 826  */
 827 int evp_pkey_ctx_set_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
 828 int evp_pkey_ctx_get_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
 829
 830 EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
 831                               OSSL_LIB_CTX *libctx, const char *propq);
 832 int evp_pkey_name2type(const char *name);
 833
 834 int evp_pkey_ctx_set1_id_prov(EVP_PKEY_CTX *ctx, const void *id, int len);
 835 int evp_pkey_ctx_get1_id_prov(EVP_PKEY_CTX *ctx, void *id);
 836 int evp_pkey_ctx_get1_id_len_prov(EVP_PKEY_CTX *ctx, size_t *id_len);
 837
 838 int evp_pkey_ctx_use_cached_data(EVP_PKEY_CTX *ctx);
 839 #endif /* !defined(FIPS_MODULE) */
 840 void evp_method_store_flush(OSSL_LIB_CTX *libctx);
 841 int evp_set_default_properties_int(OSSL_LIB_CTX *libctx, const char *propq,
 842                                    int loadconfig);
 843
 844 void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force);