1/* crypto/evp/evp_lib.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/evp.h>
62#include <openssl/objects.h>
63
64int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
65	{
66	int ret;
67
68	if (c->cipher->set_asn1_parameters != NULL)
69		ret=c->cipher->set_asn1_parameters(c,type);
70	else
71		ret=-1;
72	return(ret);
73	}
74
75int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
76	{
77	int ret;
78
79	if (c->cipher->get_asn1_parameters != NULL)
80		ret=c->cipher->get_asn1_parameters(c,type);
81	else
82		ret=-1;
83	return(ret);
84	}
85
86int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
87	{
88	int i=0;
89	unsigned int l;
90
91	if (type != NULL)
92		{
93		l=EVP_CIPHER_CTX_iv_length(c);
94		OPENSSL_assert(l <= sizeof(c->iv));
95		i=ASN1_TYPE_get_octetstring(type,c->oiv,l);
96		if (i != (int)l)
97			return(-1);
98		else if (i > 0)
99			memcpy(c->iv,c->oiv,l);
100		}
101	return(i);
102	}
103
104int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
105	{
106	int i=0;
107	unsigned int j;
108
109	if (type != NULL)
110		{
111		j=EVP_CIPHER_CTX_iv_length(c);
112		OPENSSL_assert(j <= sizeof(c->iv));
113		i=ASN1_TYPE_set_octetstring(type,c->oiv,j);
114		}
115	return(i);
116	}
117
118/* Convert the various cipher NIDs and dummies to a proper OID NID */
119int EVP_CIPHER_type(const EVP_CIPHER *ctx)
120{
121	int nid;
122	ASN1_OBJECT *otmp;
123	nid = EVP_CIPHER_nid(ctx);
124
125	switch(nid) {
126
127		case NID_rc2_cbc:
128		case NID_rc2_64_cbc:
129		case NID_rc2_40_cbc:
130
131		return NID_rc2_cbc;
132
133		case NID_rc4:
134		case NID_rc4_40:
135
136		return NID_rc4;
137
138		case NID_aes_128_cfb128:
139		case NID_aes_128_cfb8:
140		case NID_aes_128_cfb1:
141
142		return NID_aes_128_cfb128;
143
144		case NID_aes_192_cfb128:
145		case NID_aes_192_cfb8:
146		case NID_aes_192_cfb1:
147
148		return NID_aes_192_cfb128;
149
150		case NID_aes_256_cfb128:
151		case NID_aes_256_cfb8:
152		case NID_aes_256_cfb1:
153
154		return NID_aes_256_cfb128;
155
156		case NID_des_cfb64:
157		case NID_des_cfb8:
158		case NID_des_cfb1:
159
160		return NID_des_cfb64;
161
162		default:
163		/* Check it has an OID and it is valid */
164		otmp = OBJ_nid2obj(nid);
165		if(!otmp || !otmp->data) nid = NID_undef;
166		ASN1_OBJECT_free(otmp);
167		return nid;
168	}
169}
170
171int EVP_CIPHER_block_size(const EVP_CIPHER *e)
172	{
173	return e->block_size;
174	}
175
176int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
177	{
178	return ctx->cipher->block_size;
179	}
180
181int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl)
182	{
183	return ctx->cipher->do_cipher(ctx,out,in,inl);
184	}
185
186const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
187	{
188	return ctx->cipher;
189	}
190
191unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
192	{
193	return cipher->flags;
194	}
195
196unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
197	{
198	return ctx->cipher->flags;
199	}
200
201void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
202	{
203	return ctx->app_data;
204	}
205
206void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
207	{
208	ctx->app_data = data;
209	}
210
211int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
212	{
213	return cipher->iv_len;
214	}
215
216int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
217	{
218	return ctx->cipher->iv_len;
219	}
220
221int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
222	{
223	return cipher->key_len;
224	}
225
226int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
227	{
228	return ctx->cipher->key_len;
229	}
230
231int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
232	{
233	return cipher->nid;
234	}
235
236int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
237	{
238	return ctx->cipher->nid;
239	}
240
241int EVP_MD_block_size(const EVP_MD *md)
242	{
243	return md->block_size;
244	}
245
246int EVP_MD_type(const EVP_MD *md)
247	{
248	return md->type;
249	}
250
251int EVP_MD_pkey_type(const EVP_MD *md)
252	{
253	return md->pkey_type;
254	}
255
256int EVP_MD_size(const EVP_MD *md)
257	{
258	return md->md_size;
259	}
260
261const EVP_MD * EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
262	{
263	return ctx->digest;
264	}
265
266void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
267	{
268	ctx->flags |= flags;
269	}
270
271void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
272	{
273	ctx->flags &= ~flags;
274	}
275
276int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
277	{
278	return (ctx->flags & flags);
279	}
280