crypto/evp/cmeth_lib.c

   1 /*
   2  * Copyright 2015-2016 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 #include <string.h>
  11
  12 #include <openssl/evp.h>
  13 #include "internal/evp_int.h"
  14 #include "internal/provider.h"
  15 #include "evp_locl.h"
  16
  17 EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)
  18 {
  19     EVP_CIPHER *cipher = evp_cipher_new();
  20
  21     if (cipher != NULL) {
  22         cipher->nid = cipher_type;
  23         cipher->block_size = block_size;
  24         cipher->key_len = key_len;
  25     }
  26     return cipher;
  27 }
  28
  29 EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
  30 {
  31     EVP_CIPHER *to = NULL;
  32
  33     /*
  34      * Non-legacy EVP_CIPHERs can't be duplicated like this.
  35      * Use EVP_CIPHER_up_ref() instead.
  36      */
  37     if (cipher->prov != NULL)
  38         return NULL;
  39
  40     if ((to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
  41                                   cipher->key_len)) != NULL) {
  42         CRYPTO_RWLOCK *lock = to->lock;
  43
  44         memcpy(to, cipher, sizeof(*to));
  45         to->lock = lock;
  46     }
  47     return to;
  48 }
  49
  50 void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
  51 {
  52     EVP_CIPHER_free(cipher);
  53 }
  54
  55 int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
  56 {
  57     if (cipher->iv_len != 0)
  58         return 0;
  59
  60     cipher->iv_len = iv_len;
  61     return 1;
  62 }
  63
  64 int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
  65 {
  66     if (cipher->flags != 0)
  67         return 0;
  68
  69     cipher->flags = flags;
  70     return 1;
  71 }
  72
  73 int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
  74 {
  75     if (cipher->ctx_size != 0)
  76         return 0;
  77
  78     cipher->ctx_size = ctx_size;
  79     return 1;
  80 }
  81
  82 int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
  83                              int (*init) (EVP_CIPHER_CTX *ctx,
  84                                           const unsigned char *key,
  85                                           const unsigned char *iv,
  86                                           int enc))
  87 {
  88     if (cipher->init != NULL)
  89         return 0;
  90
  91     cipher->init = init;
  92     return 1;
  93 }
  94
  95 int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
  96                                   int (*do_cipher) (EVP_CIPHER_CTX *ctx,
  97                                                     unsigned char *out,
  98                                                     const unsigned char *in,
  99                                                     size_t inl))
 100 {
 101     if (cipher->do_cipher != NULL)
 102         return 0;
 103
 104     cipher->do_cipher = do_cipher;
 105     return 1;
 106 }
 107
 108 int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
 109                                 int (*cleanup) (EVP_CIPHER_CTX *))
 110 {
 111     if (cipher->cleanup != NULL)
 112         return 0;
 113
 114     cipher->cleanup = cleanup;
 115     return 1;
 116 }
 117
 118 int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
 119                                         int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
 120                                                                     ASN1_TYPE *))
 121 {
 122     if (cipher->set_asn1_parameters != NULL)
 123         return 0;
 124
 125     cipher->set_asn1_parameters = set_asn1_parameters;
 126     return 1;
 127 }
 128
 129 int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
 130                                         int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
 131                                                                     ASN1_TYPE *))
 132 {
 133     if (cipher->get_asn1_parameters != NULL)
 134         return 0;
 135
 136     cipher->get_asn1_parameters = get_asn1_parameters;
 137     return 1;
 138 }
 139
 140 int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
 141                              int (*ctrl) (EVP_CIPHER_CTX *, int type,
 142                                           int arg, void *ptr))
 143 {
 144     if (cipher->ctrl != NULL)
 145         return 0;
 146
 147     cipher->ctrl = ctrl;
 148     return 1;
 149 }
 150
 151
 152 int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 153                                                           const unsigned char *key,
 154                                                           const unsigned char *iv,
 155                                                           int enc)
 156 {
 157     return cipher->init;
 158 }
 159 int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 160                                                                unsigned char *out,
 161                                                                const unsigned char *in,
 162                                                                size_t inl)
 163 {
 164     return cipher->do_cipher;
 165 }
 166
 167 int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
 168 {
 169     return cipher->cleanup;
 170 }
 171
 172 int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 173                                                                      ASN1_TYPE *)
 174 {
 175     return cipher->set_asn1_parameters;
 176 }
 177
 178 int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 179                                                                ASN1_TYPE *)
 180 {
 181     return cipher->get_asn1_parameters;
 182 }
 183
 184 int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 185                                                           int type, int arg,
 186                                                           void *ptr)
 187 {
 188     return cipher->ctrl;
 189 }
 190