crypto/evp/evp_local.h

   1 /*
   2  * Copyright 2000-2020 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 /* EVP_MD_CTX related stuff */
  11
  12 #include <openssl/core_numbers.h>
  13
  14 #define EVP_CTRL_RET_UNSUPPORTED -1
  15
  16
  17 struct evp_md_ctx_st {
  18     const EVP_MD *reqdigest;    /* The original requested digest */
  19     const EVP_MD *digest;
  20     ENGINE *engine;             /* functional reference if 'digest' is
  21                                  * ENGINE-provided */
  22     unsigned long flags;
  23     void *md_data;
  24     /* Public key context for sign/verify */
  25     EVP_PKEY_CTX *pctx;
  26     /* Update function: usually copied from EVP_MD */
  27     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
  28
  29     /* Provider ctx */
  30     void *provctx;
  31     EVP_MD *fetched_digest;
  32 } /* EVP_MD_CTX */ ;
  33
  34 struct evp_cipher_ctx_st {
  35     const EVP_CIPHER *cipher;
  36     ENGINE *engine;             /* functional reference if 'cipher' is
  37                                  * ENGINE-provided */
  38     int encrypt;                /* encrypt or decrypt */
  39     int buf_len;                /* number we have left */
  40     unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
  41     unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
  42     unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
  43     int num;                    /* used by cfb/ofb/ctr mode */
  44     /* FIXME: Should this even exist? It appears unused */
  45     void *app_data;             /* application stuff */
  46     int key_len;                /* May change for variable length cipher */
  47     unsigned long flags;        /* Various flags */
  48     void *cipher_data;          /* per EVP data */
  49     int final_used;
  50     int block_mask;
  51     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  52
  53     /* Provider ctx */
  54     void *provctx;
  55     EVP_CIPHER *fetched_cipher;
  56 } /* EVP_CIPHER_CTX */ ;
  57
  58 struct evp_mac_ctx_st {
  59     EVP_MAC *meth;               /* Method structure */
  60     void *data;                  /* Individual method data */
  61 } /* EVP_MAC_CTX */;
  62
  63 struct evp_kdf_ctx_st {
  64     EVP_KDF *meth;              /* Method structure */
  65     void *data;                 /* Algorithm-specific data */
  66 } /* EVP_KDF_CTX */ ;
  67
  68 struct evp_keymgmt_st {
  69     int id;                      /* libcrypto internal */
  70
  71     int name_id;
  72     OSSL_PROVIDER *prov;
  73     CRYPTO_REF_COUNT refcnt;
  74     CRYPTO_RWLOCK *lock;
  75
  76     /* Constructor(s), destructor, information */
  77     OSSL_OP_keymgmt_new_fn *new;
  78     OSSL_OP_keymgmt_free_fn *free;
  79     OSSL_OP_keymgmt_get_params_fn *get_params;
  80     OSSL_OP_keymgmt_gettable_params_fn *gettable_params;
  81     OSSL_OP_keymgmt_set_params_fn *set_params;
  82     OSSL_OP_keymgmt_settable_params_fn *settable_params;
  83
  84     /* Generation, a complex constructor */
  85     OSSL_OP_keymgmt_gen_init_fn *gen_init;
  86     OSSL_OP_keymgmt_gen_set_template_fn *gen_set_template;
  87     OSSL_OP_keymgmt_gen_set_params_fn *gen_set_params;
  88     OSSL_OP_keymgmt_gen_settable_params_fn *gen_settable_params;
  89     OSSL_OP_keymgmt_gen_fn *gen;
  90     OSSL_OP_keymgmt_gen_cleanup_fn *gen_cleanup;
  91
  92     /* Key object checking */
  93     OSSL_OP_keymgmt_query_operation_name_fn *query_operation_name;
  94     OSSL_OP_keymgmt_has_fn *has;
  95     OSSL_OP_keymgmt_validate_fn *validate;
  96     OSSL_OP_keymgmt_match_fn *match;
  97
  98     /* Import and export routines */
  99     OSSL_OP_keymgmt_import_fn *import;
 100     OSSL_OP_keymgmt_import_types_fn *import_types;
 101     OSSL_OP_keymgmt_export_fn *export;
 102     OSSL_OP_keymgmt_export_types_fn *export_types;
 103     OSSL_OP_keymgmt_copy_fn *copy;
 104 } /* EVP_KEYMGMT */ ;
 105
 106 struct evp_keyexch_st {
 107     int name_id;
 108     OSSL_PROVIDER *prov;
 109     CRYPTO_REF_COUNT refcnt;
 110     CRYPTO_RWLOCK *lock;
 111
 112     OSSL_OP_keyexch_newctx_fn *newctx;
 113     OSSL_OP_keyexch_init_fn *init;
 114     OSSL_OP_keyexch_set_peer_fn *set_peer;
 115     OSSL_OP_keyexch_derive_fn *derive;
 116     OSSL_OP_keyexch_freectx_fn *freectx;
 117     OSSL_OP_keyexch_dupctx_fn *dupctx;
 118     OSSL_OP_keyexch_set_ctx_params_fn *set_ctx_params;
 119     OSSL_OP_keyexch_settable_ctx_params_fn *settable_ctx_params;
 120     OSSL_OP_keyexch_get_ctx_params_fn *get_ctx_params;
 121     OSSL_OP_keyexch_gettable_ctx_params_fn *gettable_ctx_params;
 122 } /* EVP_KEYEXCH */;
 123
 124 struct evp_signature_st {
 125     int name_id;
 126     OSSL_PROVIDER *prov;
 127     CRYPTO_REF_COUNT refcnt;
 128     CRYPTO_RWLOCK *lock;
 129
 130     OSSL_OP_signature_newctx_fn *newctx;
 131     OSSL_OP_signature_sign_init_fn *sign_init;
 132     OSSL_OP_signature_sign_fn *sign;
 133     OSSL_OP_signature_verify_init_fn *verify_init;
 134     OSSL_OP_signature_verify_fn *verify;
 135     OSSL_OP_signature_verify_recover_init_fn *verify_recover_init;
 136     OSSL_OP_signature_verify_recover_fn *verify_recover;
 137     OSSL_OP_signature_digest_sign_init_fn *digest_sign_init;
 138     OSSL_OP_signature_digest_sign_update_fn *digest_sign_update;
 139     OSSL_OP_signature_digest_sign_final_fn *digest_sign_final;
 140     OSSL_OP_signature_digest_sign_fn *digest_sign;
 141     OSSL_OP_signature_digest_verify_init_fn *digest_verify_init;
 142     OSSL_OP_signature_digest_verify_update_fn *digest_verify_update;
 143     OSSL_OP_signature_digest_verify_final_fn *digest_verify_final;
 144     OSSL_OP_signature_digest_verify_fn *digest_verify;
 145     OSSL_OP_signature_freectx_fn *freectx;
 146     OSSL_OP_signature_dupctx_fn *dupctx;
 147     OSSL_OP_signature_get_ctx_params_fn *get_ctx_params;
 148     OSSL_OP_signature_gettable_ctx_params_fn *gettable_ctx_params;
 149     OSSL_OP_signature_set_ctx_params_fn *set_ctx_params;
 150     OSSL_OP_signature_settable_ctx_params_fn *settable_ctx_params;
 151     OSSL_OP_signature_get_ctx_md_params_fn *get_ctx_md_params;
 152     OSSL_OP_signature_gettable_ctx_md_params_fn *gettable_ctx_md_params;
 153     OSSL_OP_signature_set_ctx_md_params_fn *set_ctx_md_params;
 154     OSSL_OP_signature_settable_ctx_md_params_fn *settable_ctx_md_params;
 155 } /* EVP_SIGNATURE */;
 156
 157 struct evp_asym_cipher_st {
 158     int name_id;
 159     OSSL_PROVIDER *prov;
 160     CRYPTO_REF_COUNT refcnt;
 161     CRYPTO_RWLOCK *lock;
 162
 163     OSSL_OP_asym_cipher_newctx_fn *newctx;
 164     OSSL_OP_asym_cipher_encrypt_init_fn *encrypt_init;
 165     OSSL_OP_asym_cipher_encrypt_fn *encrypt;
 166     OSSL_OP_asym_cipher_decrypt_init_fn *decrypt_init;
 167     OSSL_OP_asym_cipher_decrypt_fn *decrypt;
 168     OSSL_OP_asym_cipher_freectx_fn *freectx;
 169     OSSL_OP_asym_cipher_dupctx_fn *dupctx;
 170     OSSL_OP_asym_cipher_get_ctx_params_fn *get_ctx_params;
 171     OSSL_OP_asym_cipher_gettable_ctx_params_fn *gettable_ctx_params;
 172     OSSL_OP_asym_cipher_set_ctx_params_fn *set_ctx_params;
 173     OSSL_OP_asym_cipher_settable_ctx_params_fn *settable_ctx_params;
 174 } /* EVP_ASYM_CIPHER */;
 175
 176 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
 177                              int passlen, ASN1_TYPE *param,
 178                              const EVP_CIPHER *c, const EVP_MD *md,
 179                              int en_de);
 180
 181 struct evp_Encode_Ctx_st {
 182     /* number saved in a partial encode/decode */
 183     int num;
 184     /*
 185      * The length is either the output line length (in input bytes) or the
 186      * shortest input line length that is ok.  Once decoding begins, the
 187      * length is adjusted up each time a longer line is decoded
 188      */
 189     int length;
 190     /* data to encode */
 191     unsigned char enc_data[80];
 192     /* number read on current line */
 193     int line_num;
 194     unsigned int flags;
 195 };
 196
 197 typedef struct evp_pbe_st EVP_PBE_CTL;
 198 DEFINE_STACK_OF(EVP_PBE_CTL)
 199
 200 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 201
 202 #include <openssl/types.h>
 203 #include <openssl/core.h>
 204
 205 void *evp_generic_fetch(OPENSSL_CTX *ctx, int operation_id,
 206                         const char *name, const char *properties,
 207                         void *(*new_method)(int name_id,
 208                                             const OSSL_DISPATCH *fns,
 209                                             OSSL_PROVIDER *prov),
 210                         int (*up_ref_method)(void *),
 211                         void (*free_method)(void *));
 212 void *evp_generic_fetch_by_number(OPENSSL_CTX *ctx, int operation_id,
 213                                   int name_id, const char *properties,
 214                                   void *(*new_method)(int name_id,
 215                                                       const OSSL_DISPATCH *fns,
 216                                                       OSSL_PROVIDER *prov),
 217                                   int (*up_ref_method)(void *),
 218                                   void (*free_method)(void *));
 219 void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
 220                         void (*user_fn)(void *method, void *arg),
 221                         void *user_arg,
 222                         void *(*new_method)(int name_id,
 223                                             const OSSL_DISPATCH *fns,
 224                                             OSSL_PROVIDER *prov),
 225                         void (*free_method)(void *));
 226
 227 /* Internal fetchers for method types that are to be combined with others */
 228 EVP_KEYMGMT *evp_keymgmt_fetch_by_number(OPENSSL_CTX *ctx, int name_id,
 229                                          const char *properties);
 230
 231 /* Internal structure constructors for fetched methods */
 232 EVP_MD *evp_md_new(void);
 233 EVP_CIPHER *evp_cipher_new(void);
 234
 235 /* Helper functions to avoid duplicating code */
 236
 237 /*
 238  * These methods implement different ways to pass a params array to the
 239  * provider.  They will return one of these values:
 240  *
 241  * -2 if the method doesn't come from a provider
 242  *    (evp_do_param will return this to the called)
 243  * -1 if the provider doesn't offer the desired function
 244  *    (evp_do_param will raise an error and return 0)
 245  * or the return value from the desired function
 246  *    (evp_do_param will return it to the caller)
 247  */
 248 int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
 249 int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
 250                               OSSL_PARAM params[]);
 251 int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
 252                               OSSL_PARAM params[]);
 253 int evp_do_md_getparams(const EVP_MD *md, OSSL_PARAM params[]);
 254 int evp_do_md_ctx_getparams(const EVP_MD *md, void *provctx,
 255                             OSSL_PARAM params[]);
 256 int evp_do_md_ctx_setparams(const EVP_MD *md, void *provctx,
 257                             OSSL_PARAM params[]);
 258
 259 OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
 260
 261 #define M_check_autoarg(ctx, arg, arglen, err) \
 262     if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) {           \
 263         size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey);         \
 264                                                                   \
 265         if (pksize == 0) {                                        \
 266             ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); /*ckerr_ignore*/ \
 267             return 0;                                             \
 268         }                                                         \
 269         if (arg == NULL) {                                        \
 270             *arglen = pksize;                                     \
 271             return 1;                                             \
 272         }                                                         \
 273         if (*arglen < pksize) {                                   \
 274             ERR_raise(ERR_LIB_EVP, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
 275             return 0;                                             \
 276         }                                                         \
 277     }
 278
 279 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx);
 280
 281 /* OSSL_PROVIDER * is only used to get the library context */
 282 const char *evp_first_name(const OSSL_PROVIDER *prov, int name_id);
 283 int evp_is_a(OSSL_PROVIDER *prov, int number,
 284              const char *legacy_name, const char *name);
 285 void evp_names_do_all(OSSL_PROVIDER *prov, int number,
 286                       void (*fn)(const char *name, void *data),
 287                       void *data);
 288 int evp_cipher_cache_constants(EVP_CIPHER *cipher);