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     const EVP_KDF *meth;         /* Method structure */
  65     EVP_KDF_IMPL *impl;          /* Algorithm-specific data */
  66 } /* EVP_KDF_CTX */ ;
  67
  68 struct evp_keymgmt_st {
  69     int id;                      /* libcrypto internal */
  70
  71     char *name;
  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 evp_keyexch_st {
  95     char *name;
  96     OSSL_PROVIDER *prov;
  97     CRYPTO_REF_COUNT refcnt;
  98     CRYPTO_RWLOCK *lock;
  99
 100     EVP_KEYMGMT *keymgmt;
 101
 102     OSSL_OP_keyexch_newctx_fn *newctx;
 103     OSSL_OP_keyexch_init_fn *init;
 104     OSSL_OP_keyexch_set_peer_fn *set_peer;
 105     OSSL_OP_keyexch_derive_fn *derive;
 106     OSSL_OP_keyexch_freectx_fn *freectx;
 107     OSSL_OP_keyexch_dupctx_fn *dupctx;
 108     OSSL_OP_keyexch_set_params_fn *set_params;
 109 } /* EVP_KEYEXCH */;
 110
 111 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
 112                              int passlen, ASN1_TYPE *param,
 113                              const EVP_CIPHER *c, const EVP_MD *md,
 114                              int en_de);
 115
 116 struct evp_Encode_Ctx_st {
 117     /* number saved in a partial encode/decode */
 118     int num;
 119     /*
 120      * The length is either the output line length (in input bytes) or the
 121      * shortest input line length that is ok.  Once decoding begins, the
 122      * length is adjusted up each time a longer line is decoded
 123      */
 124     int length;
 125     /* data to encode */
 126     unsigned char enc_data[80];
 127     /* number read on current line */
 128     int line_num;
 129     unsigned int flags;
 130 };
 131
 132 typedef struct evp_pbe_st EVP_PBE_CTL;
 133 DEFINE_STACK_OF(EVP_PBE_CTL)
 134
 135 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 136
 137 #include <openssl/ossl_typ.h>
 138 #include <openssl/core.h>
 139
 140 void *evp_generic_fetch(OPENSSL_CTX *ctx, int operation_id,
 141                         const char *algorithm, const char *properties,
 142                         void *(*new_method)(const char *name,
 143                                             const OSSL_DISPATCH *fns,
 144                                             OSSL_PROVIDER *prov,
 145                                             void *method_data),
 146                         void *method_data,
 147                         int (*up_ref_method)(void *),
 148                         void (*free_method)(void *));
 149 void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
 150                         void (*user_fn)(void *method, void *arg),
 151                         void *user_arg,
 152                         void *(*new_method)(const char *name,
 153                                             const OSSL_DISPATCH *fns,
 154                                             OSSL_PROVIDER *prov,
 155                                             void *method_data),
 156                         void *method_data,
 157                         void (*free_method)(void *));
 158
 159 /* Helper functions to avoid duplicating code */
 160
 161 /*
 162  * These methods implement different ways to pass a params array to the
 163  * provider.  They will return one of these values:
 164  *
 165  * -2 if the method doesn't come from a provider
 166  *    (evp_do_param will return this to the called)
 167  * -1 if the provider doesn't offer the desired function
 168  *    (evp_do_param will raise an error and return 0)
 169  * or the return value from the desired function
 170  *    (evp_do_param will return it to the caller)
 171  */
 172 int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
 173 int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
 174                               OSSL_PARAM params[]);
 175 int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
 176                               OSSL_PARAM params[]);
 177 int evp_do_md_getparams(const EVP_MD *md, OSSL_PARAM params[]);
 178 int evp_do_md_ctx_getparams(const EVP_MD *md, void *provctx,
 179                             OSSL_PARAM params[]);
 180 int evp_do_md_ctx_setparams(const EVP_MD *md, void *provctx,
 181                             OSSL_PARAM params[]);
 182
 183 OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
 184
 185 #define M_check_autoarg(ctx, arg, arglen, err) \
 186     if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) {           \
 187         size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey);         \
 188                                                                   \
 189         if (pksize == 0) {                                        \
 190             EVPerr(err, EVP_R_INVALID_KEY); /*ckerr_ignore*/      \
 191             return 0;                                             \
 192         }                                                         \
 193         if (arg == NULL) {                                        \
 194             *arglen = pksize;                                     \
 195             return 1;                                             \
 196         }                                                         \
 197         if (*arglen < pksize) {                                   \
 198             EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
 199             return 0;                                             \
 200         }                                                         \
 201     }