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_init_fn *init;
 200     OSSL_FUNC_mac_update_fn *update;
 201     OSSL_FUNC_mac_final_fn *final;
 202     OSSL_FUNC_mac_gettable_params_fn *gettable_params;
 203     OSSL_FUNC_mac_gettable_ctx_params_fn *gettable_ctx_params;
 204     OSSL_FUNC_mac_settable_ctx_params_fn *settable_ctx_params;
 205     OSSL_FUNC_mac_get_params_fn *get_params;
 206     OSSL_FUNC_mac_get_ctx_params_fn *get_ctx_params;
 207     OSSL_FUNC_mac_set_ctx_params_fn *set_ctx_params;
 208 };
 209
 210 struct evp_kdf_st {
 211     OSSL_PROVIDER *prov;
 212     int name_id;
 213     CRYPTO_REF_COUNT refcnt;
 214     CRYPTO_RWLOCK *lock;
 215
 216     OSSL_FUNC_kdf_newctx_fn *newctx;
 217     OSSL_FUNC_kdf_dupctx_fn *dupctx;
 218     OSSL_FUNC_kdf_freectx_fn *freectx;
 219     OSSL_FUNC_kdf_reset_fn *reset;
 220     OSSL_FUNC_kdf_derive_fn *derive;
 221     OSSL_FUNC_kdf_gettable_params_fn *gettable_params;
 222     OSSL_FUNC_kdf_gettable_ctx_params_fn *gettable_ctx_params;
 223     OSSL_FUNC_kdf_settable_ctx_params_fn *settable_ctx_params;
 224     OSSL_FUNC_kdf_get_params_fn *get_params;
 225     OSSL_FUNC_kdf_get_ctx_params_fn *get_ctx_params;
 226     OSSL_FUNC_kdf_set_ctx_params_fn *set_ctx_params;
 227 };
 228
 229 struct evp_md_st {
 230     /* nid */
 231     int type;
 232
 233     /* Legacy structure members */
 234     /* TODO(3.0): Remove these */
 235     int pkey_type;
 236     int md_size;
 237     unsigned long flags;
 238     int (*init) (EVP_MD_CTX *ctx);
 239     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
 240     int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
 241     int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
 242     int (*cleanup) (EVP_MD_CTX *ctx);
 243     int block_size;
 244     int ctx_size;               /* how big does the ctx->md_data need to be */
 245     /* control function */
 246     int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
 247
 248     /* New structure members */
 249     /* TODO(3.0): Remove above comment when legacy has gone */
 250     int name_id;
 251     OSSL_PROVIDER *prov;
 252     CRYPTO_REF_COUNT refcnt;
 253     CRYPTO_RWLOCK *lock;
 254     OSSL_FUNC_digest_newctx_fn *newctx;
 255     OSSL_FUNC_digest_init_fn *dinit;
 256     OSSL_FUNC_digest_update_fn *dupdate;
 257     OSSL_FUNC_digest_final_fn *dfinal;
 258     OSSL_FUNC_digest_digest_fn *digest;
 259     OSSL_FUNC_digest_freectx_fn *freectx;
 260     OSSL_FUNC_digest_dupctx_fn *dupctx;
 261     OSSL_FUNC_digest_get_params_fn *get_params;
 262     OSSL_FUNC_digest_set_ctx_params_fn *set_ctx_params;
 263     OSSL_FUNC_digest_get_ctx_params_fn *get_ctx_params;
 264     OSSL_FUNC_digest_gettable_params_fn *gettable_params;
 265     OSSL_FUNC_digest_settable_ctx_params_fn *settable_ctx_params;
 266     OSSL_FUNC_digest_gettable_ctx_params_fn *gettable_ctx_params;
 267
 268 } /* EVP_MD */ ;
 269
 270 struct evp_cipher_st {
 271     int nid;
 272
 273     int block_size;
 274     /* Default value for variable length ciphers */
 275     int key_len;
 276     int iv_len;
 277
 278     /* Legacy structure members */
 279     /* TODO(3.0): Remove these */
 280     /* Various flags */
 281     unsigned long flags;
 282     /* init key */
 283     int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
 284                  const unsigned char *iv, int enc);
 285     /* encrypt/decrypt data */
 286     int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
 287                       const unsigned char *in, size_t inl);
 288     /* cleanup ctx */
 289     int (*cleanup) (EVP_CIPHER_CTX *);
 290     /* how big ctx->cipher_data needs to be */
 291     int ctx_size;
 292     /* Populate a ASN1_TYPE with parameters */
 293     int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 294     /* Get parameters from a ASN1_TYPE */
 295     int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
 296     /* Miscellaneous operations */
 297     int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
 298     /* Application data */
 299     void *app_data;
 300
 301     /* New structure members */
 302     /* TODO(3.0): Remove above comment when legacy has gone */
 303     int name_id;
 304     OSSL_PROVIDER *prov;
 305     CRYPTO_REF_COUNT refcnt;
 306     CRYPTO_RWLOCK *lock;
 307     OSSL_FUNC_cipher_newctx_fn *newctx;
 308     OSSL_FUNC_cipher_encrypt_init_fn *einit;
 309     OSSL_FUNC_cipher_decrypt_init_fn *dinit;
 310     OSSL_FUNC_cipher_update_fn *cupdate;
 311     OSSL_FUNC_cipher_final_fn *cfinal;
 312     OSSL_FUNC_cipher_cipher_fn *ccipher;
 313     OSSL_FUNC_cipher_freectx_fn *freectx;
 314     OSSL_FUNC_cipher_dupctx_fn *dupctx;
 315     OSSL_FUNC_cipher_get_params_fn *get_params;
 316     OSSL_FUNC_cipher_get_ctx_params_fn *get_ctx_params;
 317     OSSL_FUNC_cipher_set_ctx_params_fn *set_ctx_params;
 318     OSSL_FUNC_cipher_gettable_params_fn *gettable_params;
 319     OSSL_FUNC_cipher_gettable_ctx_params_fn *gettable_ctx_params;
 320     OSSL_FUNC_cipher_settable_ctx_params_fn *settable_ctx_params;
 321 } /* EVP_CIPHER */ ;
 322
 323 /* Macros to code block cipher wrappers */
 324
 325 /* Wrapper functions for each cipher mode */
 326
 327 #define EVP_C_DATA(kstruct, ctx) \
 328         ((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 329
 330 #define BLOCK_CIPHER_ecb_loop() \
 331         size_t i, bl; \
 332         bl = EVP_CIPHER_CTX_cipher(ctx)->block_size;    \
 333         if (inl < bl) return 1;\
 334         inl -= bl; \
 335         for (i=0; i <= inl; i+=bl)
 336
 337 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 338 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 339 {\
 340         BLOCK_CIPHER_ecb_loop() \
 341             cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
 342         return 1;\
 343 }
 344
 345 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
 346
 347 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
 348     static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 349 {\
 350         while(inl>=EVP_MAXCHUNK) {\
 351             int num = EVP_CIPHER_CTX_num(ctx);\
 352             cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
 353             EVP_CIPHER_CTX_set_num(ctx, num);\
 354             inl-=EVP_MAXCHUNK;\
 355             in +=EVP_MAXCHUNK;\
 356             out+=EVP_MAXCHUNK;\
 357         }\
 358         if (inl) {\
 359             int num = EVP_CIPHER_CTX_num(ctx);\
 360             cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
 361             EVP_CIPHER_CTX_set_num(ctx, num);\
 362         }\
 363         return 1;\
 364 }
 365
 366 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 367 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 368 {\
 369         while(inl>=EVP_MAXCHUNK) \
 370             {\
 371             cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_encrypting(ctx));\
 372             inl-=EVP_MAXCHUNK;\
 373             in +=EVP_MAXCHUNK;\
 374             out+=EVP_MAXCHUNK;\
 375             }\
 376         if (inl)\
 377             cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_encrypting(ctx));\
 378         return 1;\
 379 }
 380
 381 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched)  \
 382 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
 383 {\
 384     size_t chunk = EVP_MAXCHUNK;\
 385     if (cbits == 1)  chunk >>= 3;\
 386     if (inl < chunk) chunk = inl;\
 387     while (inl && inl >= chunk)\
 388     {\
 389         int num = EVP_CIPHER_CTX_num(ctx);\
 390         cprefix##_cfb##cbits##_encrypt(in, out, (long) \
 391             ((cbits == 1) \
 392                 && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
 393                 ? chunk*8 : chunk), \
 394             &EVP_C_DATA(kstruct, ctx)->ksched, ctx->iv,\
 395             &num, EVP_CIPHER_CTX_encrypting(ctx));\
 396         EVP_CIPHER_CTX_set_num(ctx, num);\
 397         inl -= chunk;\
 398         in += chunk;\
 399         out += chunk;\
 400         if (inl < chunk) chunk = inl;\
 401     }\
 402     return 1;\
 403 }
 404
 405 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 406         BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
 407         BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
 408         BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 409         BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
 410
 411 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
 412                           key_len, iv_len, flags, init_key, cleanup, \
 413                           set_asn1, get_asn1, ctrl) \
 414 static const EVP_CIPHER cname##_##mode = { \
 415         nid##_##nmode, block_size, key_len, iv_len, \
 416         flags | EVP_CIPH_##MODE##_MODE, \
 417         init_key, \
 418         cname##_##mode##_cipher, \
 419         cleanup, \
 420         sizeof(kstruct), \
 421         set_asn1, get_asn1,\
 422         ctrl, \
 423         NULL \
 424 }; \
 425 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
 426
 427 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
 428                              iv_len, flags, init_key, cleanup, set_asn1, \
 429                              get_asn1, ctrl) \
 430 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
 431                   iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 432
 433 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
 434                              iv_len, cbits, flags, init_key, cleanup, \
 435                              set_asn1, get_asn1, ctrl) \
 436 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
 437                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 438                   get_asn1, ctrl)
 439
 440 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
 441                              iv_len, cbits, flags, init_key, cleanup, \
 442                              set_asn1, get_asn1, ctrl) \
 443 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
 444                   key_len, iv_len, flags, init_key, cleanup, set_asn1, \
 445                   get_asn1, ctrl)
 446
 447 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
 448                              flags, init_key, cleanup, set_asn1, \
 449                              get_asn1, ctrl) \
 450 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
 451                   0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
 452
 453 #define BLOCK_CIPHER_defs(cname, kstruct, \
 454                           nid, block_size, key_len, iv_len, cbits, flags, \
 455                           init_key, cleanup, set_asn1, get_asn1, ctrl) \
 456 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
 457                      init_key, cleanup, set_asn1, get_asn1, ctrl) \
 458 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
 459                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 460 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
 461                      flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
 462 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
 463                      init_key, cleanup, set_asn1, get_asn1, ctrl)
 464
 465 /*-
 466 #define BLOCK_CIPHER_defs(cname, kstruct, \
 467                                 nid, block_size, key_len, iv_len, flags,\
 468                                  init_key, cleanup, set_asn1, get_asn1, ctrl)\
 469 static const EVP_CIPHER cname##_cbc = {\
 470         nid##_cbc, block_size, key_len, iv_len, \
 471         flags | EVP_CIPH_CBC_MODE,\
 472         init_key,\
 473         cname##_cbc_cipher,\
 474         cleanup,\
 475         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 476                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 477         set_asn1, get_asn1,\
 478         ctrl, \
 479         NULL \
 480 };\
 481 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
 482 static const EVP_CIPHER cname##_cfb = {\
 483         nid##_cfb64, 1, key_len, iv_len, \
 484         flags | EVP_CIPH_CFB_MODE,\
 485         init_key,\
 486         cname##_cfb_cipher,\
 487         cleanup,\
 488         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 489                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 490         set_asn1, get_asn1,\
 491         ctrl,\
 492         NULL \
 493 };\
 494 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
 495 static const EVP_CIPHER cname##_ofb = {\
 496         nid##_ofb64, 1, key_len, iv_len, \
 497         flags | EVP_CIPH_OFB_MODE,\
 498         init_key,\
 499         cname##_ofb_cipher,\
 500         cleanup,\
 501         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 502                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 503         set_asn1, get_asn1,\
 504         ctrl,\
 505         NULL \
 506 };\
 507 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
 508 static const EVP_CIPHER cname##_ecb = {\
 509         nid##_ecb, block_size, key_len, iv_len, \
 510         flags | EVP_CIPH_ECB_MODE,\
 511         init_key,\
 512         cname##_ecb_cipher,\
 513         cleanup,\
 514         sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
 515                 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
 516         set_asn1, get_asn1,\
 517         ctrl,\
 518         NULL \
 519 };\
 520 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
 521 */
 522
 523 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
 524                                block_size, key_len, iv_len, cbits, \
 525                                flags, init_key, \
 526                                cleanup, set_asn1, get_asn1, ctrl) \
 527         BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
 528         BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
 529                           cbits, flags, init_key, cleanup, set_asn1, \
 530                           get_asn1, ctrl)
 531
 532 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
 533         BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
 534         BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
 535                              NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
 536                              (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
 537                              cipher##_init_key, NULL, NULL, NULL, NULL)
 538
 539 typedef struct {
 540     unsigned char iv[EVP_MAX_IV_LENGTH];
 541     unsigned int iv_len;
 542     unsigned int tag_len;
 543 } evp_cipher_aead_asn1_params;
 544
 545 int evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 546                                 evp_cipher_aead_asn1_params *params);
 547
 548 int evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 549                                 evp_cipher_aead_asn1_params *params);
 550
 551 /*
 552  * An EVP_PKEY can have the following states:
 553  *
 554  * untyped & empty:
 555  *
 556  *     type == EVP_PKEY_NONE && keymgmt == NULL
 557  *
 558  * typed & empty:
 559  *
 560  *     (type != EVP_PKEY_NONE && pkey.ptr == NULL)      ## legacy (libcrypto only)
 561  *     || (keymgmt != NULL && keydata == NULL)          ## provider side
 562  *
 563  * fully assigned:
 564  *
 565  *     (type != EVP_PKEY_NONE && pkey.ptr != NULL)      ## legacy (libcrypto only)
 566  *     || (keymgmt != NULL && keydata != NULL)          ## provider side
 567  *
 568  * The easiest way to detect a legacy key is:
 569  *
 570  *     keymgmt == NULL && type != EVP_PKEY_NONE
 571  *
 572  * The easiest way to detect a provider side key is:
 573  *
 574  *     keymgmt != NULL
 575  */
 576 #define evp_pkey_is_blank(pk)                                   \
 577     ((pk)->type == EVP_PKEY_NONE && (pk)->keymgmt == NULL)
 578 #define evp_pkey_is_typed(pk)                                   \
 579     ((pk)->type != EVP_PKEY_NONE || (pk)->keymgmt != NULL)
 580 #define evp_pkey_is_assigned(pk)                                \
 581     ((pk)->pkey.ptr != NULL || (pk)->keydata != NULL)
 582 #define evp_pkey_is_legacy(pk)                                  \
 583     ((pk)->type != EVP_PKEY_NONE && (pk)->keymgmt == NULL)
 584 #define evp_pkey_is_provided(pk)                                \
 585     ((pk)->keymgmt != NULL)
 586
 587 struct evp_pkey_st {
 588     /* == Legacy attributes == */
 589     int type;
 590     int save_type;
 591
 592 # ifndef FIPS_MODULE
 593     /*
 594      * Legacy key "origin" is composed of a pointer to an EVP_PKEY_ASN1_METHOD,
 595      * a pointer to a low level key and possibly a pointer to an engine.
 596      */
 597     const EVP_PKEY_ASN1_METHOD *ameth;
 598     ENGINE *engine;
 599     ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
 600     union {
 601         void *ptr;
 602         struct rsa_st *rsa;     /* RSA */
 603 #  ifndef OPENSSL_NO_DSA
 604         struct dsa_st *dsa;     /* DSA */
 605 #  endif
 606 #  ifndef OPENSSL_NO_DH
 607         struct dh_st *dh;       /* DH */
 608 #  endif
 609 #  ifndef OPENSSL_NO_EC
 610         struct ec_key_st *ec;   /* ECC */
 611         ECX_KEY *ecx;           /* X25519, X448, Ed25519, Ed448 */
 612 #  endif
 613     } pkey;
 614 # endif
 615
 616     /* == Common attributes == */
 617     /* If these are modified, so must evp_pkey_downgrade() */
 618     CRYPTO_REF_COUNT references;
 619     CRYPTO_RWLOCK *lock;
 620     STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
 621     int save_parameters;
 622 #ifndef FIPS_MODULE
 623     CRYPTO_EX_DATA ex_data;
 624 #endif
 625
 626     /* == Provider attributes == */
 627
 628     /*
 629      * Provider keydata "origin" is composed of a pointer to an EVP_KEYMGMT
 630      * and a pointer to the provider side key data.  This is never used at
 631      * the same time as the legacy key data above.
 632      */
 633     EVP_KEYMGMT *keymgmt;
 634     void *keydata;
 635     /*
 636      * If any libcrypto code does anything that may modify the keydata
 637      * contents, this dirty counter must be incremented.
 638      */
 639     size_t dirty_cnt;
 640
 641     /*
 642      * To support transparent execution of operation in backends other
 643      * than the "origin" key, we support transparent export/import to
 644      * those providers, and maintain a cache of the imported keydata,
 645      * so we don't need to redo the export/import every time we perform
 646      * the same operation in that same provider.
 647      * This requires that the "origin" backend (whether it's a legacy or a
 648      * provider "origin") implements exports, and that the target provider
 649      * has an EVP_KEYMGMT that implements import.
 650      *
 651      * The cache limit is set at 10 different providers using the same
 652      * "origin".  It's probably over the top, but is preferable to too
 653      * few.
 654      */
 655     struct {
 656         EVP_KEYMGMT *keymgmt;
 657         void *keydata;
 658     } operation_cache[10];
 659     /*
 660      * We keep a copy of that "origin"'s dirty count, so we know if the
 661      * operation cache needs flushing.
 662      */
 663     size_t dirty_cnt_copy;
 664
 665     /* Cache of key object information */
 666     struct {
 667         int bits;
 668         int security_bits;
 669         int size;
 670     } cache;
 671 } /* EVP_PKEY */ ;
 672
 673 #define EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) \
 674     ((ctx)->operation == EVP_PKEY_OP_SIGN \
 675      || (ctx)->operation == EVP_PKEY_OP_SIGNCTX \
 676      || (ctx)->operation == EVP_PKEY_OP_VERIFY \
 677      || (ctx)->operation == EVP_PKEY_OP_VERIFYCTX \
 678      || (ctx)->operation == EVP_PKEY_OP_VERIFYRECOVER)
 679
 680 #define EVP_PKEY_CTX_IS_DERIVE_OP(ctx) \
 681     ((ctx)->operation == EVP_PKEY_OP_DERIVE)
 682
 683 #define EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) \
 684     ((ctx)->operation == EVP_PKEY_OP_ENCRYPT \
 685      || (ctx)->operation == EVP_PKEY_OP_DECRYPT)
 686
 687 #define EVP_PKEY_CTX_IS_GEN_OP(ctx) \
 688     ((ctx)->operation == EVP_PKEY_OP_PARAMGEN \
 689      || (ctx)->operation == EVP_PKEY_OP_KEYGEN)
 690
 691 #define EVP_PKEY_CTX_IS_KEM_OP(ctx) \
 692     ((ctx)->operation == EVP_PKEY_OP_ENCAPSULATE \
 693      || (ctx)->operation == EVP_PKEY_OP_DECAPSULATE)
 694
 695 void openssl_add_all_ciphers_int(void);
 696 void openssl_add_all_digests_int(void);
 697 void evp_cleanup_int(void);
 698 void evp_app_cleanup_int(void);
 699 void *evp_pkey_export_to_provider(EVP_PKEY *pk, OSSL_LIB_CTX *libctx,
 700                                   EVP_KEYMGMT **keymgmt,
 701                                   const char *propquery);
 702 #ifndef FIPS_MODULE
 703 int evp_pkey_copy_downgraded(EVP_PKEY **dest, const EVP_PKEY *src);
 704 int evp_pkey_downgrade(EVP_PKEY *pk);
 705 void evp_pkey_free_legacy(EVP_PKEY *x);
 706 #endif
 707
 708 /*
 709  * KEYMGMT utility functions
 710  */
 711
 712 /*
 713  * Key import structure and helper function, to be used as an export callback
 714  */
 715 struct evp_keymgmt_util_try_import_data_st {
 716     EVP_KEYMGMT *keymgmt;
 717     void *keydata;
 718
 719     int selection;
 720 };
 721 int evp_keymgmt_util_try_import(const OSSL_PARAM params[], void *arg);
 722 int evp_keymgmt_util_assign_pkey(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt,
 723                                  void *keydata);
 724 EVP_PKEY *evp_keymgmt_util_make_pkey(EVP_KEYMGMT *keymgmt, void *keydata);
 725
 726 int evp_keymgmt_util_export(const EVP_PKEY *pk, int selection,
 727                             OSSL_CALLBACK *export_cb, void *export_cbarg);
 728 void *evp_keymgmt_util_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt);
 729 size_t evp_keymgmt_util_find_operation_cache_index(EVP_PKEY *pk,
 730                                                    EVP_KEYMGMT *keymgmt);
 731 int evp_keymgmt_util_clear_operation_cache(EVP_PKEY *pk, int locking);
 732 int evp_keymgmt_util_cache_keydata(EVP_PKEY *pk, size_t index,
 733                                    EVP_KEYMGMT *keymgmt, void *keydata);
 734 void evp_keymgmt_util_cache_keyinfo(EVP_PKEY *pk);
 735 void *evp_keymgmt_util_fromdata(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
 736                                 int selection, const OSSL_PARAM params[]);
 737 int evp_keymgmt_util_has(EVP_PKEY *pk, int selection);
 738 int evp_keymgmt_util_match(EVP_PKEY *pk1, EVP_PKEY *pk2, int selection);
 739 int evp_keymgmt_util_copy(EVP_PKEY *to, EVP_PKEY *from, int selection);
 740 void *evp_keymgmt_util_gen(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
 741                            void *genctx, OSSL_CALLBACK *cb, void *cbarg);
 742 int evp_keymgmt_util_get_deflt_digest_name(EVP_KEYMGMT *keymgmt,
 743                                            void *keydata,
 744                                            char *mdname, size_t mdname_sz);
 745
 746 /*
 747  * KEYMGMT provider interface functions
 748  */
 749 void *evp_keymgmt_newdata(const EVP_KEYMGMT *keymgmt);
 750 void evp_keymgmt_freedata(const EVP_KEYMGMT *keymgmt, void *keyddata);
 751 int evp_keymgmt_get_params(const EVP_KEYMGMT *keymgmt,
 752                            void *keydata, OSSL_PARAM params[]);
 753 int evp_keymgmt_set_params(const EVP_KEYMGMT *keymgmt,
 754                            void *keydata, const OSSL_PARAM params[]);
 755 void *evp_keymgmt_gen_init(const EVP_KEYMGMT *keymgmt, int selection);
 756 int evp_keymgmt_gen_set_template(const EVP_KEYMGMT *keymgmt, void *genctx,
 757                                  void *template);
 758 int evp_keymgmt_gen_set_params(const EVP_KEYMGMT *keymgmt, void *genctx,
 759                                const OSSL_PARAM params[]);
 760 void *evp_keymgmt_gen(const EVP_KEYMGMT *keymgmt, void *genctx,
 761                       OSSL_CALLBACK *cb, void *cbarg);
 762 void evp_keymgmt_gen_cleanup(const EVP_KEYMGMT *keymgmt, void *genctx);
 763
 764 void *evp_keymgmt_load(const EVP_KEYMGMT *keymgmt,
 765                        const void *objref, size_t objref_sz);
 766
 767 int evp_keymgmt_has(const EVP_KEYMGMT *keymgmt, void *keyddata, int selection);
 768 int evp_keymgmt_validate(const EVP_KEYMGMT *keymgmt, void *keydata,
 769                          int selection);
 770 int evp_keymgmt_match(const EVP_KEYMGMT *keymgmt,
 771                       const void *keydata1, const void *keydata2,
 772                       int selection);
 773
 774 int evp_keymgmt_import(const EVP_KEYMGMT *keymgmt, void *keydata,
 775                        int selection, const OSSL_PARAM params[]);
 776 const OSSL_PARAM *evp_keymgmt_import_types(const EVP_KEYMGMT *keymgmt,
 777                                            int selection);
 778 int evp_keymgmt_export(const EVP_KEYMGMT *keymgmt, void *keydata,
 779                        int selection, OSSL_CALLBACK *param_cb, void *cbarg);
 780 const OSSL_PARAM *evp_keymgmt_export_types(const EVP_KEYMGMT *keymgmt,
 781                                            int selection);
 782 int evp_keymgmt_copy(const EVP_KEYMGMT *keymgmt,
 783                      void *keydata_to, const void *keydata_from,
 784                      int selection);
 785
 786 /* Pulling defines out of C source files */
 787
 788 #define EVP_RC4_KEY_SIZE 16
 789 #ifndef TLS1_1_VERSION
 790 # define TLS1_1_VERSION   0x0302
 791 #endif
 792
 793 void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags);
 794
 795 /* EVP_ENCODE_CTX flags */
 796 /* Don't generate new lines when encoding */
 797 #define EVP_ENCODE_CTX_NO_NEWLINES          1
 798 /* Use the SRP base64 alphabet instead of the standard one */
 799 #define EVP_ENCODE_CTX_USE_SRP_ALPHABET     2
 800
 801 const EVP_CIPHER *evp_get_cipherbyname_ex(OSSL_LIB_CTX *libctx,
 802                                           const char *name);
 803 const EVP_MD *evp_get_digestbyname_ex(OSSL_LIB_CTX *libctx,
 804                                       const char *name);
 805
 806 int pkcs5_pbkdf2_hmac_ex(const char *pass, int passlen,
 807                          const unsigned char *salt, int saltlen, int iter,
 808                          const EVP_MD *digest, int keylen, unsigned char *out,
 809                          OSSL_LIB_CTX *libctx, const char *propq);
 810
 811 #ifndef FIPS_MODULE
 812 /*
 813  * Internal helpers for stricter EVP_PKEY_CTX_{set,get}_params().
 814  *
 815  * Return 1 on success, 0 or negative for errors.
 816  *
 817  * In particular they return -2 if any of the params is not supported.
 818  *
 819  * They are not available in FIPS_MODULE as they depend on
 820  *      - EVP_PKEY_CTX_{get,set}_params()
 821  *      - EVP_PKEY_CTX_{gettable,settable}_params()
 822  *
 823  */
 824 int evp_pkey_ctx_set_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
 825 int evp_pkey_ctx_get_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
 826
 827 EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
 828                               OSSL_LIB_CTX *libctx, const char *propq);
 829 int evp_pkey_name2type(const char *name);
 830 const char *evp_pkey_type2name(int type);
 831
 832 int evp_pkey_ctx_set1_id_prov(EVP_PKEY_CTX *ctx, const void *id, int len);
 833 int evp_pkey_ctx_get1_id_prov(EVP_PKEY_CTX *ctx, void *id);
 834 int evp_pkey_ctx_get1_id_len_prov(EVP_PKEY_CTX *ctx, size_t *id_len);
 835
 836 int evp_pkey_ctx_use_cached_data(EVP_PKEY_CTX *ctx);
 837 #endif /* !defined(FIPS_MODULE) */
 838 void evp_method_store_flush(OSSL_LIB_CTX *libctx);
 839 int evp_set_default_properties_int(OSSL_LIB_CTX *libctx, const char *propq,
 840                                    int loadconfig);
 841
 842 void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force);