crypto/evp/cmeth_lib.c

   1 /*
   2  * Copyright 2015-2020 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     }
  54     return to;
  55 }
  56
  57 void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
  58 {
  59     if (cipher == NULL || cipher->origin != EVP_ORIG_METH)
  60        return;
  61
  62     evp_cipher_free_int(cipher);
  63 }
  64
  65 int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
  66 {
  67     if (cipher->iv_len != 0)
  68         return 0;
  69
  70     cipher->iv_len = iv_len;
  71     return 1;
  72 }
  73
  74 int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
  75 {
  76     if (cipher->flags != 0)
  77         return 0;
  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     if (cipher->ctx_size != 0)
  86         return 0;
  87
  88     cipher->ctx_size = ctx_size;
  89     return 1;
  90 }
  91
  92 int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
  93                              int (*init) (EVP_CIPHER_CTX *ctx,
  94                                           const unsigned char *key,
  95                                           const unsigned char *iv,
  96                                           int enc))
  97 {
  98     if (cipher->init != NULL)
  99         return 0;
 100
 101     cipher->init = init;
 102     return 1;
 103 }
 104
 105 int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
 106                                   int (*do_cipher) (EVP_CIPHER_CTX *ctx,
 107                                                     unsigned char *out,
 108                                                     const unsigned char *in,
 109                                                     size_t inl))
 110 {
 111     if (cipher->do_cipher != NULL)
 112         return 0;
 113
 114     cipher->do_cipher = do_cipher;
 115     return 1;
 116 }
 117
 118 int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
 119                                 int (*cleanup) (EVP_CIPHER_CTX *))
 120 {
 121     if (cipher->cleanup != NULL)
 122         return 0;
 123
 124     cipher->cleanup = cleanup;
 125     return 1;
 126 }
 127
 128 int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
 129                                         int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
 130                                                                     ASN1_TYPE *))
 131 {
 132     if (cipher->set_asn1_parameters != NULL)
 133         return 0;
 134
 135     cipher->set_asn1_parameters = set_asn1_parameters;
 136     return 1;
 137 }
 138
 139 int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
 140                                         int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
 141                                                                     ASN1_TYPE *))
 142 {
 143     if (cipher->get_asn1_parameters != NULL)
 144         return 0;
 145
 146     cipher->get_asn1_parameters = get_asn1_parameters;
 147     return 1;
 148 }
 149
 150 int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
 151                              int (*ctrl) (EVP_CIPHER_CTX *, int type,
 152                                           int arg, void *ptr))
 153 {
 154     if (cipher->ctrl != NULL)
 155         return 0;
 156
 157     cipher->ctrl = ctrl;
 158     return 1;
 159 }
 160
 161
 162 int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 163                                                           const unsigned char *key,
 164                                                           const unsigned char *iv,
 165                                                           int enc)
 166 {
 167     return cipher->init;
 168 }
 169 int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
 170                                                                unsigned char *out,
 171                                                                const unsigned char *in,
 172                                                                size_t inl)
 173 {
 174     return cipher->do_cipher;
 175 }
 176
 177 int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)
 178 {
 179     return cipher->cleanup;
 180 }
 181
 182 int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 183                                                                      ASN1_TYPE *)
 184 {
 185     return cipher->set_asn1_parameters;
 186 }
 187
 188 int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 189                                                                ASN1_TYPE *)
 190 {
 191     return cipher->get_asn1_parameters;
 192 }
 193
 194 int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
 195                                                           int type, int arg,
 196                                                           void *ptr)
 197 {
 198     return cipher->ctrl;
 199 }
 200