1 /* crypto/evp/evp_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/evp.h>
62 #include <openssl/objects.h>
64 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
68 if (c->cipher->set_asn1_parameters != NULL)
69 ret = c->cipher->set_asn1_parameters(c, type);
70 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
71 switch (EVP_CIPHER_CTX_mode(c)) {
73 case EVP_CIPH_GCM_MODE:
74 case EVP_CIPH_CCM_MODE:
75 case EVP_CIPH_XTS_MODE:
80 ret = EVP_CIPHER_set_asn1_iv(c, type);
87 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
91 if (c->cipher->get_asn1_parameters != NULL)
92 ret = c->cipher->get_asn1_parameters(c, type);
93 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
94 switch (EVP_CIPHER_CTX_mode(c)) {
96 case EVP_CIPH_GCM_MODE:
97 case EVP_CIPH_CCM_MODE:
98 case EVP_CIPH_XTS_MODE:
103 ret = EVP_CIPHER_get_asn1_iv(c, type);
111 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
117 l = EVP_CIPHER_CTX_iv_length(c);
118 OPENSSL_assert(l <= sizeof(c->iv));
119 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
123 memcpy(c->iv, c->oiv, l);
128 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
134 j = EVP_CIPHER_CTX_iv_length(c);
135 OPENSSL_assert(j <= sizeof(c->iv));
136 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
141 /* Convert the various cipher NIDs and dummies to a proper OID NID */
142 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
146 nid = EVP_CIPHER_nid(ctx);
161 case NID_aes_128_cfb128:
162 case NID_aes_128_cfb8:
163 case NID_aes_128_cfb1:
165 return NID_aes_128_cfb128;
167 case NID_aes_192_cfb128:
168 case NID_aes_192_cfb8:
169 case NID_aes_192_cfb1:
171 return NID_aes_192_cfb128;
173 case NID_aes_256_cfb128:
174 case NID_aes_256_cfb8:
175 case NID_aes_256_cfb1:
177 return NID_aes_256_cfb128;
183 return NID_des_cfb64;
185 case NID_des_ede3_cfb64:
186 case NID_des_ede3_cfb8:
187 case NID_des_ede3_cfb1:
189 return NID_des_cfb64;
192 /* Check it has an OID and it is valid */
193 otmp = OBJ_nid2obj(nid);
194 if (!otmp || !otmp->data)
196 ASN1_OBJECT_free(otmp);
201 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
203 return e->block_size;
206 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
208 return ctx->cipher->block_size;
211 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
212 const unsigned char *in, unsigned int inl)
214 return ctx->cipher->do_cipher(ctx, out, in, inl);
217 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
222 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
224 return cipher->flags;
227 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
229 return ctx->cipher->flags;
232 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
234 return ctx->app_data;
237 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
239 ctx->app_data = data;
242 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
244 return cipher->iv_len;
247 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
249 return ctx->cipher->iv_len;
252 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
254 return cipher->key_len;
257 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
262 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
267 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
269 return ctx->cipher->nid;
272 int EVP_MD_block_size(const EVP_MD *md)
274 return md->block_size;
277 int EVP_MD_type(const EVP_MD *md)
282 int EVP_MD_pkey_type(const EVP_MD *md)
284 return md->pkey_type;
287 int EVP_MD_size(const EVP_MD *md)
290 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
296 unsigned long EVP_MD_flags(const EVP_MD *md)
301 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
308 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
313 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
315 ctx->flags &= ~flags;
318 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
320 return (ctx->flags & flags);
323 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
328 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
330 ctx->flags &= ~flags;
333 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
335 return (ctx->flags & flags);