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 = OPENSSL_zalloc(sizeof(EVP_CIPHER));
  20
  21     if (cipher != NULL) {
  22         cipher->nid = cipher_type;
  23         cipher->block_size = block_size;
  24         cipher->key_len = key_len;
  25         cipher->lock = CRYPTO_THREAD_lock_new();
  26         if (cipher->lock == NULL) {
  27             OPENSSL_free(cipher);
  28             return NULL;
  29         }
  30         cipher->refcnt = 1;
  31     }
  32     return cipher;
  33 }
  34
  35 EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
  36 {
  37     EVP_CIPHER *to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
  38                                          cipher->key_len);
  39
  40     if (to != NULL) {
  41         CRYPTO_RWLOCK *lock = to->lock;
  42
  43         memcpy(to, cipher, sizeof(*to));
  44         to->lock = lock;
  45     }
  46     return to;
  47 }
  48
  49 void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
  50 {
  51     if (cipher != NULL) {
  52         int i;
  53
  54         CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
  55         if (i > 0)
  56             return;
  57         ossl_provider_free(cipher->prov);
  58         CRYPTO_THREAD_lock_free(cipher->lock);
  59         OPENSSL_free(cipher);
  60     }
  61 }
  62
  63 int EVP_CIPHER_upref(EVP_CIPHER *cipher)
  64 {
  65     int ref = 0;
  66
  67     CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
  68     return 1;
  69 }
  70
  71 int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
  72 {
  73     cipher->iv_len = iv_len;
  74     return 1;
  75 }
  76
  77 int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
  78 {
  79     cipher->flags = flags;
  80     return 1;
  81 }
  82
  83 int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
  84 {
  85     cipher->ctx_size = ctx_size;
  86     return 1;
  87 }
  88
  89 int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
  90                              int (*init) (EVP_CIPHER_CTX *ctx,
  91                                           const unsigned char *key,
  92                                           const unsigned char *iv,
  93                                           int enc))
  94 {
  95     cipher->init = init;
  96     return 1;
  97 }
  98
  99 int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
 100                                   int (*do_cipher) (EVP_CIPHER_CTX *ctx,
 101                                                     unsigned char *out,
 102                                                     const unsigned char *in,
 103                                                     size_t inl))
 104 {
 105     cipher->do_cipher = do_cipher;
 106     return 1;
 107 }
 108
 109 int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
 110                                 int (*cleanup) (EVP_CIPHER_CTX *))
 111 {
 112     cipher->cleanup = cleanup;
 113     return 1;
 114 }
 115
 116 int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
 117                                         int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
 118                                                                     ASN1_TYPE *))
 119 {
 120     cipher->set_asn1_parameters = set_asn1_parameters;
 121     return 1;
 122 }
 123
 124 int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
 125                                         int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
 126                                                                     ASN1_TYPE *))
 127 {
 128     cipher->get_asn1_parameters = get_asn1_parameters;
 129     return 1;
 130 }
 131
 132 int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
 133                              int (*ctrl) (EVP_CIPHER_CTX *, int type,
 134                                           int arg, void *ptr))
 135 {
 136     cipher->ctrl = ctrl;
 137     return 1;
 138 }
 139
 140
 141 int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 142                                                           const unsigned char *key,
 143                                                           const unsigned char *iv,
 144                                                           int enc)
 145 {
 146     return cipher->init;
 147 }
 148 int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 149                                                                unsigned char *out,
 150                                                                const unsigned char *in,
 151                                                                size_t inl)
 152 {
 153     return cipher->do_cipher;
 154 }
 155
 156 int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
 157 {
 158     return cipher->cleanup;
 159 }
 160
 161 int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 162                                                                      ASN1_TYPE *)
 163 {
 164     return cipher->set_asn1_parameters;
 165 }
 166
 167 int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 168                                                                ASN1_TYPE *)
 169 {
 170     return cipher->get_asn1_parameters;
 171 }
 172
 173 int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 174                                                           int type, int arg,
 175                                                           void *ptr)
 176 {
 177     return cipher->ctrl;
 178 }
 179