crypto/evp/evp_local.h

   1 /*
   2  * Copyright 2000-2023 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/core_dispatch.h>
  11 #include "internal/refcount.h"
  12
  13 #define EVP_CTRL_RET_UNSUPPORTED -1
  14
  15
  16 struct evp_md_ctx_st {
  17     const EVP_MD *reqdigest;    /* The original requested digest */
  18     const EVP_MD *digest;
  19     ENGINE *engine;             /* functional reference if 'digest' is
  20                                  * ENGINE-provided */
  21     unsigned long flags;
  22     void *md_data;
  23     /* Public key context for sign/verify */
  24     EVP_PKEY_CTX *pctx;
  25     /* Update function: usually copied from EVP_MD */
  26     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
  27
  28     /*
  29      * Opaque ctx returned from a providers digest algorithm implementation
  30      * OSSL_FUNC_digest_newctx()
  31      */
  32     void *algctx;
  33     EVP_MD *fetched_digest;
  34 } /* EVP_MD_CTX */ ;
  35
  36 struct evp_cipher_ctx_st {
  37     const EVP_CIPHER *cipher;
  38     ENGINE *engine;             /* functional reference if 'cipher' is
  39                                  * ENGINE-provided */
  40     int encrypt;                /* encrypt or decrypt */
  41     int buf_len;                /* number we have left */
  42     unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
  43     unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
  44     unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
  45     int num;                    /* used by cfb/ofb/ctr mode */
  46     /* FIXME: Should this even exist? It appears unused */
  47     void *app_data;             /* application stuff */
  48     int key_len;                /* May change for variable length cipher */
  49     int iv_len;                 /* IV length */
  50     unsigned long flags;        /* Various flags */
  51     void *cipher_data;          /* per EVP data */
  52     int final_used;
  53     int block_mask;
  54     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  55
  56     /*
  57      * Opaque ctx returned from a providers cipher algorithm implementation
  58      * OSSL_FUNC_cipher_newctx()
  59      */
  60     void *algctx;
  61     EVP_CIPHER *fetched_cipher;
  62 } /* EVP_CIPHER_CTX */ ;
  63
  64 struct evp_mac_ctx_st {
  65     EVP_MAC *meth;               /* Method structure */
  66     /*
  67      * Opaque ctx returned from a providers MAC algorithm implementation
  68      * OSSL_FUNC_mac_newctx()
  69      */
  70     void *algctx;
  71 } /* EVP_MAC_CTX */;
  72
  73 struct evp_kdf_ctx_st {
  74     EVP_KDF *meth;              /* Method structure */
  75     /*
  76      * Opaque ctx returned from a providers KDF algorithm implementation
  77      * OSSL_FUNC_kdf_newctx()
  78      */
  79     void *algctx;
  80 } /* EVP_KDF_CTX */ ;
  81
  82 struct evp_rand_ctx_st {
  83     EVP_RAND *meth;             /* Method structure */
  84     /*
  85      * Opaque ctx returned from a providers rand algorithm implementation
  86      * OSSL_FUNC_rand_newctx()
  87      */
  88     void *algctx;
  89     EVP_RAND_CTX *parent;       /* Parent EVP_RAND or NULL if none */
  90     CRYPTO_REF_COUNT refcnt;    /* Context reference count */
  91     CRYPTO_RWLOCK *refcnt_lock;
  92 } /* EVP_RAND_CTX */ ;
  93
  94 struct evp_keymgmt_st {
  95     int id;                      /* libcrypto internal */
  96
  97     int name_id;
  98     char *type_name;
  99     const char *description;
 100     OSSL_PROVIDER *prov;
 101     CRYPTO_REF_COUNT refcnt;
 102
 103     /* Constructor(s), destructor, information */
 104     OSSL_FUNC_keymgmt_new_fn *new;
 105     OSSL_FUNC_keymgmt_free_fn *free;
 106     OSSL_FUNC_keymgmt_get_params_fn *get_params;
 107     OSSL_FUNC_keymgmt_gettable_params_fn *gettable_params;
 108     OSSL_FUNC_keymgmt_set_params_fn *set_params;
 109     OSSL_FUNC_keymgmt_settable_params_fn *settable_params;
 110
 111     /* Generation, a complex constructor */
 112     OSSL_FUNC_keymgmt_gen_init_fn *gen_init;
 113     OSSL_FUNC_keymgmt_gen_set_template_fn *gen_set_template;
 114     OSSL_FUNC_keymgmt_gen_set_params_fn *gen_set_params;
 115     OSSL_FUNC_keymgmt_gen_settable_params_fn *gen_settable_params;
 116     OSSL_FUNC_keymgmt_gen_fn *gen;
 117     OSSL_FUNC_keymgmt_gen_cleanup_fn *gen_cleanup;
 118
 119     OSSL_FUNC_keymgmt_load_fn *load;
 120
 121     /* Key object checking */
 122     OSSL_FUNC_keymgmt_query_operation_name_fn *query_operation_name;
 123     OSSL_FUNC_keymgmt_has_fn *has;
 124     OSSL_FUNC_keymgmt_validate_fn *validate;
 125     OSSL_FUNC_keymgmt_match_fn *match;
 126
 127     /* Import and export routines */
 128     OSSL_FUNC_keymgmt_import_fn *import;
 129     OSSL_FUNC_keymgmt_import_types_fn *import_types;
 130     OSSL_FUNC_keymgmt_import_types_ex_fn *import_types_ex;
 131     OSSL_FUNC_keymgmt_export_fn *export;
 132     OSSL_FUNC_keymgmt_export_types_fn *export_types;
 133     OSSL_FUNC_keymgmt_export_types_ex_fn *export_types_ex;
 134     OSSL_FUNC_keymgmt_dup_fn *dup;
 135 } /* EVP_KEYMGMT */ ;
 136
 137 struct evp_keyexch_st {
 138     int name_id;
 139     char *type_name;
 140     const char *description;
 141     OSSL_PROVIDER *prov;
 142     CRYPTO_REF_COUNT refcnt;
 143
 144     OSSL_FUNC_keyexch_newctx_fn *newctx;
 145     OSSL_FUNC_keyexch_init_fn *init;
 146     OSSL_FUNC_keyexch_set_peer_fn *set_peer;
 147     OSSL_FUNC_keyexch_derive_fn *derive;
 148     OSSL_FUNC_keyexch_freectx_fn *freectx;
 149     OSSL_FUNC_keyexch_dupctx_fn *dupctx;
 150     OSSL_FUNC_keyexch_set_ctx_params_fn *set_ctx_params;
 151     OSSL_FUNC_keyexch_settable_ctx_params_fn *settable_ctx_params;
 152     OSSL_FUNC_keyexch_get_ctx_params_fn *get_ctx_params;
 153     OSSL_FUNC_keyexch_gettable_ctx_params_fn *gettable_ctx_params;
 154 } /* EVP_KEYEXCH */;
 155
 156 struct evp_signature_st {
 157     int name_id;
 158     char *type_name;
 159     const char *description;
 160     OSSL_PROVIDER *prov;
 161     CRYPTO_REF_COUNT refcnt;
 162
 163     OSSL_FUNC_signature_newctx_fn *newctx;
 164     OSSL_FUNC_signature_sign_init_fn *sign_init;
 165     OSSL_FUNC_signature_sign_fn *sign;
 166     OSSL_FUNC_signature_verify_init_fn *verify_init;
 167     OSSL_FUNC_signature_verify_fn *verify;
 168     OSSL_FUNC_signature_verify_recover_init_fn *verify_recover_init;
 169     OSSL_FUNC_signature_verify_recover_fn *verify_recover;
 170     OSSL_FUNC_signature_digest_sign_init_fn *digest_sign_init;
 171     OSSL_FUNC_signature_digest_sign_update_fn *digest_sign_update;
 172     OSSL_FUNC_signature_digest_sign_final_fn *digest_sign_final;
 173     OSSL_FUNC_signature_digest_sign_fn *digest_sign;
 174     OSSL_FUNC_signature_digest_verify_init_fn *digest_verify_init;
 175     OSSL_FUNC_signature_digest_verify_update_fn *digest_verify_update;
 176     OSSL_FUNC_signature_digest_verify_final_fn *digest_verify_final;
 177     OSSL_FUNC_signature_digest_verify_fn *digest_verify;
 178     OSSL_FUNC_signature_freectx_fn *freectx;
 179     OSSL_FUNC_signature_dupctx_fn *dupctx;
 180     OSSL_FUNC_signature_get_ctx_params_fn *get_ctx_params;
 181     OSSL_FUNC_signature_gettable_ctx_params_fn *gettable_ctx_params;
 182     OSSL_FUNC_signature_set_ctx_params_fn *set_ctx_params;
 183     OSSL_FUNC_signature_settable_ctx_params_fn *settable_ctx_params;
 184     OSSL_FUNC_signature_get_ctx_md_params_fn *get_ctx_md_params;
 185     OSSL_FUNC_signature_gettable_ctx_md_params_fn *gettable_ctx_md_params;
 186     OSSL_FUNC_signature_set_ctx_md_params_fn *set_ctx_md_params;
 187     OSSL_FUNC_signature_settable_ctx_md_params_fn *settable_ctx_md_params;
 188 } /* EVP_SIGNATURE */;
 189
 190 struct evp_asym_cipher_st {
 191     int name_id;
 192     char *type_name;
 193     const char *description;
 194     OSSL_PROVIDER *prov;
 195     CRYPTO_REF_COUNT refcnt;
 196
 197     OSSL_FUNC_asym_cipher_newctx_fn *newctx;
 198     OSSL_FUNC_asym_cipher_encrypt_init_fn *encrypt_init;
 199     OSSL_FUNC_asym_cipher_encrypt_fn *encrypt;
 200     OSSL_FUNC_asym_cipher_decrypt_init_fn *decrypt_init;
 201     OSSL_FUNC_asym_cipher_decrypt_fn *decrypt;
 202     OSSL_FUNC_asym_cipher_freectx_fn *freectx;
 203     OSSL_FUNC_asym_cipher_dupctx_fn *dupctx;
 204     OSSL_FUNC_asym_cipher_get_ctx_params_fn *get_ctx_params;
 205     OSSL_FUNC_asym_cipher_gettable_ctx_params_fn *gettable_ctx_params;
 206     OSSL_FUNC_asym_cipher_set_ctx_params_fn *set_ctx_params;
 207     OSSL_FUNC_asym_cipher_settable_ctx_params_fn *settable_ctx_params;
 208 } /* EVP_ASYM_CIPHER */;
 209
 210 struct evp_kem_st {
 211     int name_id;
 212     char *type_name;
 213     const char *description;
 214     OSSL_PROVIDER *prov;
 215     CRYPTO_REF_COUNT refcnt;
 216
 217     OSSL_FUNC_kem_newctx_fn *newctx;
 218     OSSL_FUNC_kem_encapsulate_init_fn *encapsulate_init;
 219     OSSL_FUNC_kem_encapsulate_fn *encapsulate;
 220     OSSL_FUNC_kem_decapsulate_init_fn *decapsulate_init;
 221     OSSL_FUNC_kem_decapsulate_fn *decapsulate;
 222     OSSL_FUNC_kem_freectx_fn *freectx;
 223     OSSL_FUNC_kem_dupctx_fn *dupctx;
 224     OSSL_FUNC_kem_get_ctx_params_fn *get_ctx_params;
 225     OSSL_FUNC_kem_gettable_ctx_params_fn *gettable_ctx_params;
 226     OSSL_FUNC_kem_set_ctx_params_fn *set_ctx_params;
 227     OSSL_FUNC_kem_settable_ctx_params_fn *settable_ctx_params;
 228     OSSL_FUNC_kem_auth_encapsulate_init_fn *auth_encapsulate_init;
 229     OSSL_FUNC_kem_auth_decapsulate_init_fn *auth_decapsulate_init;
 230 } /* EVP_KEM */;
 231
 232 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
 233                              int passlen, ASN1_TYPE *param,
 234                              const EVP_CIPHER *c, const EVP_MD *md,
 235                              int en_de);
 236 int PKCS5_v2_PBKDF2_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass,
 237                                 int passlen, ASN1_TYPE *param,
 238                                 const EVP_CIPHER *c, const EVP_MD *md,
 239                                 int en_de, OSSL_LIB_CTX *libctx, const char *propq);
 240
 241 struct evp_Encode_Ctx_st {
 242     /* number saved in a partial encode/decode */
 243     int num;
 244     /*
 245      * The length is either the output line length (in input bytes) or the
 246      * shortest input line length that is ok.  Once decoding begins, the
 247      * length is adjusted up each time a longer line is decoded
 248      */
 249     int length;
 250     /* data to encode */
 251     unsigned char enc_data[80];
 252     /* number read on current line */
 253     int line_num;
 254     unsigned int flags;
 255 };
 256
 257 typedef struct evp_pbe_st EVP_PBE_CTL;
 258 DEFINE_STACK_OF(EVP_PBE_CTL)
 259
 260 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 261
 262 #include <openssl/types.h>
 263 #include <openssl/core.h>
 264
 265 void *evp_generic_fetch(OSSL_LIB_CTX *ctx, int operation_id,
 266                         const char *name, const char *properties,
 267                         void *(*new_method)(int name_id,
 268                                             const OSSL_ALGORITHM *algodef,
 269                                             OSSL_PROVIDER *prov),
 270                         int (*up_ref_method)(void *),
 271                         void (*free_method)(void *));
 272 void *evp_generic_fetch_from_prov(OSSL_PROVIDER *prov, int operation_id,
 273                                   const char *name, const char *properties,
 274                                   void *(*new_method)(int name_id,
 275                                                       const OSSL_ALGORITHM *algodef,
 276                                                       OSSL_PROVIDER *prov),
 277                                   int (*up_ref_method)(void *),
 278                                   void (*free_method)(void *));
 279 void evp_generic_do_all_prefetched(OSSL_LIB_CTX *libctx, int operation_id,
 280                                    void (*user_fn)(void *method, void *arg),
 281                                    void *user_arg);
 282 void evp_generic_do_all(OSSL_LIB_CTX *libctx, int operation_id,
 283                         void (*user_fn)(void *method, void *arg),
 284                         void *user_arg,
 285                         void *(*new_method)(int name_id,
 286                                             const OSSL_ALGORITHM *algodef,
 287                                             OSSL_PROVIDER *prov),
 288                         int (*up_ref_method)(void *),
 289                         void (*free_method)(void *));
 290
 291 /* Internal fetchers for method types that are to be combined with others */
 292 EVP_KEYMGMT *evp_keymgmt_fetch_by_number(OSSL_LIB_CTX *ctx, int name_id,
 293                                          const char *properties);
 294 EVP_SIGNATURE *evp_signature_fetch_from_prov(OSSL_PROVIDER *prov,
 295                                              const char *name,
 296                                              const char *properties);
 297 EVP_ASYM_CIPHER *evp_asym_cipher_fetch_from_prov(OSSL_PROVIDER *prov,
 298                                                  const char *name,
 299                                                  const char *properties);
 300 EVP_KEYEXCH *evp_keyexch_fetch_from_prov(OSSL_PROVIDER *prov,
 301                                          const char *name,
 302                                          const char *properties);
 303 EVP_KEM *evp_kem_fetch_from_prov(OSSL_PROVIDER *prov,
 304                                  const char *name,
 305                                  const char *properties);
 306
 307 /* Internal structure constructors for fetched methods */
 308 EVP_MD *evp_md_new(void);
 309 EVP_CIPHER *evp_cipher_new(void);
 310
 311 int evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 312                                     evp_cipher_aead_asn1_params *asn1_params);
 313 int evp_cipher_set_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
 314                                     evp_cipher_aead_asn1_params *asn1_params);
 315
 316 /* Helper functions to avoid duplicating code */
 317
 318 /*
 319  * These methods implement different ways to pass a params array to the
 320  * provider.  They will return one of these values:
 321  *
 322  * -2 if the method doesn't come from a provider
 323  *    (evp_do_param will return this to the called)
 324  * -1 if the provider doesn't offer the desired function
 325  *    (evp_do_param will raise an error and return 0)
 326  * or the return value from the desired function
 327  *    (evp_do_param will return it to the caller)
 328  */
 329 int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
 330 int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
 331                               OSSL_PARAM params[]);
 332 int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
 333                               OSSL_PARAM params[]);
 334 int evp_do_md_getparams(const EVP_MD *md, OSSL_PARAM params[]);
 335 int evp_do_md_ctx_getparams(const EVP_MD *md, void *provctx,
 336                             OSSL_PARAM params[]);
 337 int evp_do_md_ctx_setparams(const EVP_MD *md, void *provctx,
 338                             OSSL_PARAM params[]);
 339
 340 OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
 341
 342 #define M_check_autoarg(ctx, arg, arglen, err) \
 343     if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) {           \
 344         size_t pksize = (size_t)EVP_PKEY_get_size(ctx->pkey);         \
 345                                                                   \
 346         if (pksize == 0) {                                        \
 347             ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); /*ckerr_ignore*/ \
 348             return 0;                                             \
 349         }                                                         \
 350         if (arg == NULL) {                                        \
 351             *arglen = pksize;                                     \
 352             return 1;                                             \
 353         }                                                         \
 354         if (*arglen < pksize) {                                   \
 355             ERR_raise(ERR_LIB_EVP, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
 356             return 0;                                             \
 357         }                                                         \
 358     }
 359
 360 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx);
 361 void evp_cipher_free_int(EVP_CIPHER *md);
 362 void evp_md_free_int(EVP_MD *md);
 363
 364 /* OSSL_PROVIDER * is only used to get the library context */
 365 int evp_is_a(OSSL_PROVIDER *prov, int number,
 366              const char *legacy_name, const char *name);
 367 int evp_names_do_all(OSSL_PROVIDER *prov, int number,
 368                      void (*fn)(const char *name, void *data),
 369                      void *data);
 370 int evp_cipher_cache_constants(EVP_CIPHER *cipher);