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 struct evp_md_ctx_st {
  15     const EVP_MD *reqdigest;    /* The original requested digest */
  16     const EVP_MD *digest;
  17     ENGINE *engine;             /* functional reference if 'digest' is
  18                                  * ENGINE-provided */
  19     unsigned long flags;
  20     void *md_data;
  21     /* Public key context for sign/verify */
  22     EVP_PKEY_CTX *pctx;
  23     /* Update function: usually copied from EVP_MD */
  24     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
  25
  26     /* Provider ctx */
  27     void *provctx;
  28     EVP_MD *fetched_digest;
  29 } /* EVP_MD_CTX */ ;
  30
  31 struct evp_cipher_ctx_st {
  32     const EVP_CIPHER *cipher;
  33     ENGINE *engine;             /* functional reference if 'cipher' is
  34                                  * ENGINE-provided */
  35     int encrypt;                /* encrypt or decrypt */
  36     int buf_len;                /* number we have left */
  37     unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
  38     unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
  39     unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
  40     int num;                    /* used by cfb/ofb/ctr mode */
  41     /* FIXME: Should this even exist? It appears unused */
  42     void *app_data;             /* application stuff */
  43     int key_len;                /* May change for variable length cipher */
  44     unsigned long flags;        /* Various flags */
  45     void *cipher_data;          /* per EVP data */
  46     int final_used;
  47     int block_mask;
  48     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  49
  50     /* Provider ctx */
  51     void *provctx;
  52     EVP_CIPHER *fetched_cipher;
  53 } /* EVP_CIPHER_CTX */ ;
  54
  55 struct evp_mac_ctx_st {
  56     const EVP_MAC *meth;         /* Method structure */
  57     void *data;                  /* Individual method data */
  58 } /* EVP_MAC_CTX */;
  59
  60 struct evp_kdf_ctx_st {
  61     const EVP_KDF *meth;         /* Method structure */
  62     EVP_KDF_IMPL *impl;          /* Algorithm-specific data */
  63 } /* EVP_KDF_CTX */ ;
  64
  65 struct evp_keymgmt_st {
  66     int id;                      /* libcrypto internal */
  67
  68     char *name;
  69     OSSL_PROVIDER *prov;
  70     CRYPTO_REF_COUNT refcnt;
  71     CRYPTO_RWLOCK *lock;
  72
  73     /* Domain parameter routines */
  74     OSSL_OP_keymgmt_importdomparams_fn *importdomparams;
  75     OSSL_OP_keymgmt_gendomparams_fn *gendomparams;
  76     OSSL_OP_keymgmt_freedomparams_fn *freedomparams;
  77     OSSL_OP_keymgmt_exportdomparams_fn *exportdomparams;
  78     OSSL_OP_keymgmt_importdomparam_types_fn *importdomparam_types;
  79     OSSL_OP_keymgmt_exportdomparam_types_fn *exportdomparam_types;
  80
  81     /* Key routines */
  82     OSSL_OP_keymgmt_importkey_fn *importkey;
  83     OSSL_OP_keymgmt_genkey_fn *genkey;
  84     OSSL_OP_keymgmt_loadkey_fn *loadkey;
  85     OSSL_OP_keymgmt_freekey_fn *freekey;
  86     OSSL_OP_keymgmt_exportkey_fn *exportkey;
  87     OSSL_OP_keymgmt_importkey_types_fn *importkey_types;
  88     OSSL_OP_keymgmt_exportkey_types_fn *exportkey_types;
  89 } /* EVP_KEYMGMT */ ;
  90
  91 struct evp_keyexch_st {
  92     char *name;
  93     OSSL_PROVIDER *prov;
  94     CRYPTO_REF_COUNT refcnt;
  95     CRYPTO_RWLOCK *lock;
  96
  97     EVP_KEYMGMT *keymgmt;
  98
  99     OSSL_OP_keyexch_newctx_fn *newctx;
 100     OSSL_OP_keyexch_init_fn *init;
 101     OSSL_OP_keyexch_set_peer_fn *set_peer;
 102     OSSL_OP_keyexch_derive_fn *derive;
 103     OSSL_OP_keyexch_freectx_fn *freectx;
 104     OSSL_OP_keyexch_dupctx_fn *dupctx;
 105     OSSL_OP_keyexch_set_params_fn *set_params;
 106 } /* EVP_KEYEXCH */;
 107
 108 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
 109                              int passlen, ASN1_TYPE *param,
 110                              const EVP_CIPHER *c, const EVP_MD *md,
 111                              int en_de);
 112
 113 struct evp_Encode_Ctx_st {
 114     /* number saved in a partial encode/decode */
 115     int num;
 116     /*
 117      * The length is either the output line length (in input bytes) or the
 118      * shortest input line length that is ok.  Once decoding begins, the
 119      * length is adjusted up each time a longer line is decoded
 120      */
 121     int length;
 122     /* data to encode */
 123     unsigned char enc_data[80];
 124     /* number read on current line */
 125     int line_num;
 126     unsigned int flags;
 127 };
 128
 129 typedef struct evp_pbe_st EVP_PBE_CTL;
 130 DEFINE_STACK_OF(EVP_PBE_CTL)
 131
 132 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 133
 134 #include <openssl/ossl_typ.h>
 135 #include <openssl/core.h>
 136
 137 void *evp_generic_fetch(OPENSSL_CTX *ctx, int operation_id,
 138                         const char *algorithm, const char *properties,
 139                         void *(*new_method)(const char *name,
 140                                             const OSSL_DISPATCH *fns,
 141                                             OSSL_PROVIDER *prov),
 142                         int (*up_ref_method)(void *),
 143                         void (*free_method)(void *));
 144 void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
 145                         void (*user_fn)(void *method, void *arg),
 146                         void *user_arg,
 147                         void *(*new_method)(const char *name,
 148                                             const OSSL_DISPATCH *fns,
 149                                             OSSL_PROVIDER *prov),
 150                         void (*free_method)(void *));
 151
 152 /* Helper functions to avoid duplicating code */
 153
 154 /*
 155  * These methods implement different ways to pass a params array to the
 156  * provider.  They will return one of these values:
 157  *
 158  * -2 if the method doesn't come from a provider
 159  *    (evp_do_param will return this to the called)
 160  * -1 if the provider doesn't offer the desired function
 161  *    (evp_do_param will raise an error and return 0)
 162  * or the return value from the desired function
 163  *    (evp_do_param will return it to the caller)
 164  */
 165 int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
 166 int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
 167                               OSSL_PARAM params[]);
 168 int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
 169                               OSSL_PARAM params[]);
 170
 171 OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
 172
 173 #define M_check_autoarg(ctx, arg, arglen, err) \
 174     if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) {           \
 175         size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey);         \
 176                                                                   \
 177         if (pksize == 0) {                                        \
 178             EVPerr(err, EVP_R_INVALID_KEY); /*ckerr_ignore*/      \
 179             return 0;                                             \
 180         }                                                         \
 181         if (arg == NULL) {                                        \
 182             *arglen = pksize;                                     \
 183             return 1;                                             \
 184         }                                                         \
 185         if (*arglen < pksize) {                                   \
 186             EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
 187             return 0;                                             \
 188         }                                                         \
 189     }