crypto/evp/evp_locl.h

   1 /*
   2  * Copyright 2000-2019 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     /* Domain parameter routines */
  77     OSSL_OP_keymgmt_importdomparams_fn *importdomparams;
  78     OSSL_OP_keymgmt_gendomparams_fn *gendomparams;
  79     OSSL_OP_keymgmt_freedomparams_fn *freedomparams;
  80     OSSL_OP_keymgmt_exportdomparams_fn *exportdomparams;
  81     OSSL_OP_keymgmt_importdomparam_types_fn *importdomparam_types;
  82     OSSL_OP_keymgmt_exportdomparam_types_fn *exportdomparam_types;
  83
  84     /* Key routines */
  85     OSSL_OP_keymgmt_importkey_fn *importkey;
  86     OSSL_OP_keymgmt_genkey_fn *genkey;
  87     OSSL_OP_keymgmt_loadkey_fn *loadkey;
  88     OSSL_OP_keymgmt_freekey_fn *freekey;
  89     OSSL_OP_keymgmt_exportkey_fn *exportkey;
  90     OSSL_OP_keymgmt_importkey_types_fn *importkey_types;
  91     OSSL_OP_keymgmt_exportkey_types_fn *exportkey_types;
  92 } /* EVP_KEYMGMT */ ;
  93
  94 struct keymgmt_data_st {
  95     OPENSSL_CTX *ctx;
  96     const char *properties;
  97 };
  98
  99 struct evp_keyexch_st {
 100     int name_id;
 101     OSSL_PROVIDER *prov;
 102     CRYPTO_REF_COUNT refcnt;
 103     CRYPTO_RWLOCK *lock;
 104
 105     EVP_KEYMGMT *keymgmt;
 106
 107     OSSL_OP_keyexch_newctx_fn *newctx;
 108     OSSL_OP_keyexch_init_fn *init;
 109     OSSL_OP_keyexch_set_peer_fn *set_peer;
 110     OSSL_OP_keyexch_derive_fn *derive;
 111     OSSL_OP_keyexch_freectx_fn *freectx;
 112     OSSL_OP_keyexch_dupctx_fn *dupctx;
 113     OSSL_OP_keyexch_set_ctx_params_fn *set_ctx_params;
 114     OSSL_OP_keyexch_settable_ctx_params_fn *settable_ctx_params;
 115 } /* EVP_KEYEXCH */;
 116
 117 struct evp_signature_st {
 118     int name_id;
 119     OSSL_PROVIDER *prov;
 120     CRYPTO_REF_COUNT refcnt;
 121     CRYPTO_RWLOCK *lock;
 122
 123     EVP_KEYMGMT *keymgmt;
 124
 125     OSSL_OP_signature_newctx_fn *newctx;
 126     OSSL_OP_signature_sign_init_fn *sign_init;
 127     OSSL_OP_signature_sign_fn *sign;
 128     OSSL_OP_signature_verify_init_fn *verify_init;
 129     OSSL_OP_signature_verify_fn *verify;
 130     OSSL_OP_signature_verify_recover_init_fn *verify_recover_init;
 131     OSSL_OP_signature_verify_recover_fn *verify_recover;
 132     OSSL_OP_signature_freectx_fn *freectx;
 133     OSSL_OP_signature_dupctx_fn *dupctx;
 134     OSSL_OP_signature_get_ctx_params_fn *get_ctx_params;
 135     OSSL_OP_signature_gettable_ctx_params_fn *gettable_ctx_params;
 136     OSSL_OP_signature_set_ctx_params_fn *set_ctx_params;
 137     OSSL_OP_signature_settable_ctx_params_fn *settable_ctx_params;
 138 } /* EVP_SIGNATURE */;
 139
 140 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
 141                              int passlen, ASN1_TYPE *param,
 142                              const EVP_CIPHER *c, const EVP_MD *md,
 143                              int en_de);
 144
 145 struct evp_Encode_Ctx_st {
 146     /* number saved in a partial encode/decode */
 147     int num;
 148     /*
 149      * The length is either the output line length (in input bytes) or the
 150      * shortest input line length that is ok.  Once decoding begins, the
 151      * length is adjusted up each time a longer line is decoded
 152      */
 153     int length;
 154     /* data to encode */
 155     unsigned char enc_data[80];
 156     /* number read on current line */
 157     int line_num;
 158     unsigned int flags;
 159 };
 160
 161 typedef struct evp_pbe_st EVP_PBE_CTL;
 162 DEFINE_STACK_OF(EVP_PBE_CTL)
 163
 164 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 165
 166 #include <openssl/ossl_typ.h>
 167 #include <openssl/core.h>
 168
 169 void *evp_generic_fetch(OPENSSL_CTX *ctx, int operation_id,
 170                         const char *name, const char *properties,
 171                         void *(*new_method)(int name_id,
 172                                             const OSSL_DISPATCH *fns,
 173                                             OSSL_PROVIDER *prov,
 174                                             void *method_data),
 175                         void *method_data,
 176                         int (*up_ref_method)(void *),
 177                         void (*free_method)(void *));
 178 void *evp_generic_fetch_by_number(OPENSSL_CTX *ctx, int operation_id,
 179                                   int name_id, const char *properties,
 180                                   void *(*new_method)(int name_id,
 181                                                       const OSSL_DISPATCH *fns,
 182                                                       OSSL_PROVIDER *prov,
 183                                                       void *method_data),
 184                                   void *method_data,
 185                                   int (*up_ref_method)(void *),
 186                                   void (*free_method)(void *));
 187 void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
 188                         void (*user_fn)(void *method, void *arg),
 189                         void *user_arg,
 190                         void *(*new_method)(int name_id,
 191                                             const OSSL_DISPATCH *fns,
 192                                             OSSL_PROVIDER *prov,
 193                                             void *method_data),
 194                         void *method_data,
 195                         void (*free_method)(void *));
 196
 197 /* Internal fetchers for method types that are to be combined with others */
 198 EVP_KEYMGMT *evp_keymgmt_fetch_by_number(OPENSSL_CTX *ctx, int name_id,
 199                                          const char *properties);
 200
 201 /* Internal structure constructors for fetched methods */
 202 EVP_MD *evp_md_new(void);
 203 EVP_CIPHER *evp_cipher_new(void);
 204
 205 /* Helper functions to avoid duplicating code */
 206
 207 /*
 208  * These methods implement different ways to pass a params array to the
 209  * provider.  They will return one of these values:
 210  *
 211  * -2 if the method doesn't come from a provider
 212  *    (evp_do_param will return this to the called)
 213  * -1 if the provider doesn't offer the desired function
 214  *    (evp_do_param will raise an error and return 0)
 215  * or the return value from the desired function
 216  *    (evp_do_param will return it to the caller)
 217  */
 218 int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
 219 int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
 220                               OSSL_PARAM params[]);
 221 int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
 222                               OSSL_PARAM params[]);
 223 int evp_do_md_getparams(const EVP_MD *md, OSSL_PARAM params[]);
 224 int evp_do_md_ctx_getparams(const EVP_MD *md, void *provctx,
 225                             OSSL_PARAM params[]);
 226 int evp_do_md_ctx_setparams(const EVP_MD *md, void *provctx,
 227                             OSSL_PARAM params[]);
 228
 229 OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
 230
 231 #define M_check_autoarg(ctx, arg, arglen, err) \
 232     if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) {           \
 233         size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey);         \
 234                                                                   \
 235         if (pksize == 0) {                                        \
 236             ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); /*ckerr_ignore*/ \
 237             return 0;                                             \
 238         }                                                         \
 239         if (arg == NULL) {                                        \
 240             *arglen = pksize;                                     \
 241             return 1;                                             \
 242         }                                                         \
 243         if (*arglen < pksize) {                                   \
 244             ERR_raise(ERR_LIB_EVP, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
 245             return 0;                                             \
 246         }                                                         \
 247     }
 248
 249 void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx);
 250
 251 /* OSSL_PROVIDER * is only used to get the library context */
 252 const char *evp_first_name(OSSL_PROVIDER *prov, int name_id);
 253 int evp_is_a(OSSL_PROVIDER *prov, int number, const char *name);