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.]
60 #include "internal/cryptlib.h"
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)) {
72 case EVP_CIPH_WRAP_MODE:
73 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
77 case EVP_CIPH_GCM_MODE:
78 case EVP_CIPH_CCM_MODE:
79 case EVP_CIPH_XTS_MODE:
80 case EVP_CIPH_OCB_MODE:
85 ret = EVP_CIPHER_set_asn1_iv(c, type);
92 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
96 if (c->cipher->get_asn1_parameters != NULL)
97 ret = c->cipher->get_asn1_parameters(c, type);
98 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
99 switch (EVP_CIPHER_CTX_mode(c)) {
101 case EVP_CIPH_WRAP_MODE:
105 case EVP_CIPH_GCM_MODE:
106 case EVP_CIPH_CCM_MODE:
107 case EVP_CIPH_XTS_MODE:
108 case EVP_CIPH_OCB_MODE:
113 ret = EVP_CIPHER_get_asn1_iv(c, type);
121 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
127 l = EVP_CIPHER_CTX_iv_length(c);
128 OPENSSL_assert(l <= sizeof(c->iv));
129 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
133 memcpy(c->iv, c->oiv, l);
138 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
144 j = EVP_CIPHER_CTX_iv_length(c);
145 OPENSSL_assert(j <= sizeof(c->iv));
146 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
151 /* Convert the various cipher NIDs and dummies to a proper OID NID */
152 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
156 nid = EVP_CIPHER_nid(ctx);
171 case NID_aes_128_cfb128:
172 case NID_aes_128_cfb8:
173 case NID_aes_128_cfb1:
175 return NID_aes_128_cfb128;
177 case NID_aes_192_cfb128:
178 case NID_aes_192_cfb8:
179 case NID_aes_192_cfb1:
181 return NID_aes_192_cfb128;
183 case NID_aes_256_cfb128:
184 case NID_aes_256_cfb8:
185 case NID_aes_256_cfb1:
187 return NID_aes_256_cfb128;
193 return NID_des_cfb64;
195 case NID_des_ede3_cfb64:
196 case NID_des_ede3_cfb8:
197 case NID_des_ede3_cfb1:
199 return NID_des_cfb64;
202 /* Check it has an OID and it is valid */
203 otmp = OBJ_nid2obj(nid);
204 if (OBJ_get0_data(otmp) == NULL)
206 ASN1_OBJECT_free(otmp);
211 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
213 return e->block_size;
216 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
218 return ctx->cipher->block_size;
221 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
222 const unsigned char *in, unsigned int inl)
224 return ctx->cipher->do_cipher(ctx, out, in, inl);
227 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
232 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
234 return cipher->flags;
237 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
239 return ctx->cipher->flags;
242 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
244 return ctx->app_data;
247 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
249 ctx->app_data = data;
252 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
254 return cipher->iv_len;
257 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
259 return ctx->cipher->iv_len;
262 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
264 return cipher->key_len;
267 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
272 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
277 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
279 return ctx->cipher->nid;
282 int EVP_MD_block_size(const EVP_MD *md)
284 return md->block_size;
287 int EVP_MD_type(const EVP_MD *md)
292 int EVP_MD_pkey_type(const EVP_MD *md)
294 return md->pkey_type;
297 int EVP_MD_size(const EVP_MD *md)
300 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
306 unsigned long EVP_MD_flags(const EVP_MD *md)
311 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
318 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
323 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
325 ctx->flags &= ~flags;
328 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
330 return (ctx->flags & flags);
333 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
338 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
340 ctx->flags &= ~flags;
343 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
345 return (ctx->flags & flags);