crypto/evp/cmeth_lib.c

   1 /*
   2  * Copyright 2015-2021 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 /*
  11  * EVP _meth_ APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <string.h>
  17
  18 #include <openssl/evp.h>
  19 #include "crypto/evp.h"
  20 #include "internal/provider.h"
  21 #include "evp_local.h"
  22
  23 EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)
  24 {
  25     EVP_CIPHER *cipher = evp_cipher_new();
  26
  27     if (cipher != NULL) {
  28         cipher->nid = cipher_type;
  29         cipher->block_size = block_size;
  30         cipher->key_len = key_len;
  31         cipher->origin = EVP_ORIG_METH;
  32     }
  33     return cipher;
  34 }
  35
  36 EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
  37 {
  38     EVP_CIPHER *to = NULL;
  39
  40     /*
  41      * Non-legacy EVP_CIPHERs can't be duplicated like this.
  42      * Use EVP_CIPHER_up_ref() instead.
  43      */
  44     if (cipher->prov != NULL)
  45         return NULL;
  46
  47     if ((to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
  48                                   cipher->key_len)) != NULL) {
  49         CRYPTO_RWLOCK *lock = to->lock;
  50
  51         memcpy(to, cipher, sizeof(*to));
  52         to->lock = lock;
  53         to->origin = EVP_ORIG_METH;
  54     }
  55     return to;
  56 }
  57
  58 void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
  59 {
  60     if (cipher == NULL || cipher->origin != EVP_ORIG_METH)
  61        return;
  62
  63     evp_cipher_free_int(cipher);
  64 }
  65
  66 int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
  67 {
  68     if (cipher->iv_len != 0)
  69         return 0;
  70
  71     cipher->iv_len = iv_len;
  72     return 1;
  73 }
  74
  75 int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
  76 {
  77     if (cipher->flags != 0)
  78         return 0;
  79
  80     cipher->flags = flags;
  81     return 1;
  82 }
  83
  84 int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
  85 {
  86     if (cipher->ctx_size != 0)
  87         return 0;
  88
  89     cipher->ctx_size = ctx_size;
  90     return 1;
  91 }
  92
  93 int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
  94                              int (*init) (EVP_CIPHER_CTX *ctx,
  95                                           const unsigned char *key,
  96                                           const unsigned char *iv,
  97                                           int enc))
  98 {
  99     if (cipher->init != NULL)
 100         return 0;
 101
 102     cipher->init = init;
 103     return 1;
 104 }
 105
 106 int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
 107                                   int (*do_cipher) (EVP_CIPHER_CTX *ctx,
 108                                                     unsigned char *out,
 109                                                     const unsigned char *in,
 110                                                     size_t inl))
 111 {
 112     if (cipher->do_cipher != NULL)
 113         return 0;
 114
 115     cipher->do_cipher = do_cipher;
 116     return 1;
 117 }
 118
 119 int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
 120                                 int (*cleanup) (EVP_CIPHER_CTX *))
 121 {
 122     if (cipher->cleanup != NULL)
 123         return 0;
 124
 125     cipher->cleanup = cleanup;
 126     return 1;
 127 }
 128
 129 int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
 130                                         int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
 131                                                                     ASN1_TYPE *))
 132 {
 133     if (cipher->set_asn1_parameters != NULL)
 134         return 0;
 135
 136     cipher->set_asn1_parameters = set_asn1_parameters;
 137     return 1;
 138 }
 139
 140 int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
 141                                         int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
 142                                                                     ASN1_TYPE *))
 143 {
 144     if (cipher->get_asn1_parameters != NULL)
 145         return 0;
 146
 147     cipher->get_asn1_parameters = get_asn1_parameters;
 148     return 1;
 149 }
 150
 151 int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
 152                              int (*ctrl) (EVP_CIPHER_CTX *, int type,
 153                                           int arg, void *ptr))
 154 {
 155     if (cipher->ctrl != NULL)
 156         return 0;
 157
 158     cipher->ctrl = ctrl;
 159     return 1;
 160 }
 161
 162
 163 int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 164                                                           const unsigned char *key,
 165                                                           const unsigned char *iv,
 166                                                           int enc)
 167 {
 168     return cipher->init;
 169 }
 170 int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 171                                                                unsigned char *out,
 172                                                                const unsigned char *in,
 173                                                                size_t inl)
 174 {
 175     return cipher->do_cipher;
 176 }
 177
 178 int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
 179 {
 180     return cipher->cleanup;
 181 }
 182
 183 int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 184                                                                      ASN1_TYPE *)
 185 {
 186     return cipher->set_asn1_parameters;
 187 }
 188
 189 int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 190                                                                ASN1_TYPE *)
 191 {
 192     return cipher->get_asn1_parameters;
 193 }
 194
 195 int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 196                                                           int type, int arg,
 197                                                           void *ptr)
 198 {
 199     return cipher->ctrl;
 200 }
 201