e_des3.c revision 109998 
1/* crypto/evp/e_des3.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#ifndef OPENSSL_NO_DES
60#include <stdio.h>
61#include "cryptlib.h"
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#include "evp_locl.h"
65#include <openssl/des.h>
66
67static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
68			    const unsigned char *iv,int enc);
69
70static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
71			     const unsigned char *iv,int enc);
72
73typedef struct
74    {
75    DES_key_schedule ks1;/* key schedule */
76    DES_key_schedule ks2;/* key schedule (for ede) */
77    DES_key_schedule ks3;/* key schedule (for ede3) */
78    } DES_EDE_KEY;
79
80#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
81
82/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
83
84static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
85			      const unsigned char *in, unsigned int inl)
86{
87	BLOCK_CIPHER_ecb_loop()
88		DES_ecb3_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
89				 &data(ctx)->ks1, &data(ctx)->ks2,
90				 &data(ctx)->ks3,
91				 ctx->encrypt);
92	return 1;
93}
94
95static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
96			      const unsigned char *in, unsigned int inl)
97{
98	DES_ede3_ofb64_encrypt(in, out, (long)inl,
99			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
100			       (DES_cblock *)ctx->iv, &ctx->num);
101	return 1;
102}
103
104static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
105			      const unsigned char *in, unsigned int inl)
106{
107#ifdef KSSL_DEBUG
108	{
109        int i;
110        char *cp;
111	printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
112	printf("\t iv= ");
113        for(i=0;i<8;i++)
114                printf("%02X",ctx->iv[i]);
115	printf("\n");
116	}
117#endif    /* KSSL_DEBUG */
118	DES_ede3_cbc_encrypt(in, out, (long)inl,
119			     &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
120			     (DES_cblock *)ctx->iv, ctx->encrypt);
121	return 1;
122}
123
124static int des_ede_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
125			      const unsigned char *in, unsigned int inl)
126{
127	DES_ede3_cfb64_encrypt(in, out, (long)inl,
128			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
129			       (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
130	return 1;
131}
132
133BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
134			0, des_ede_init_key, NULL,
135			EVP_CIPHER_set_asn1_iv,
136			EVP_CIPHER_get_asn1_iv,
137			NULL)
138
139#define des_ede3_cfb_cipher des_ede_cfb_cipher
140#define des_ede3_ofb_cipher des_ede_ofb_cipher
141#define des_ede3_cbc_cipher des_ede_cbc_cipher
142#define des_ede3_ecb_cipher des_ede_ecb_cipher
143
144BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
145			0, des_ede3_init_key, NULL,
146			EVP_CIPHER_set_asn1_iv,
147			EVP_CIPHER_get_asn1_iv,
148			NULL)
149
150static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
151			    const unsigned char *iv, int enc)
152	{
153	DES_cblock *deskey = (DES_cblock *)key;
154
155	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
156	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
157	memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
158	       sizeof(data(ctx)->ks1));
159	return 1;
160	}
161
162static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
163			     const unsigned char *iv, int enc)
164	{
165	DES_cblock *deskey = (DES_cblock *)key;
166#ifdef KSSL_DEBUG
167	{
168        int i;
169        printf("des_ede3_init_key(ctx=%lx)\n", ctx);
170	printf("\tKEY= ");
171        for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
172	printf("\t IV= ");
173        for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
174	}
175#endif	/* KSSL_DEBUG */
176
177	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
178	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
179	DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
180
181	return 1;
182	}
183
184const EVP_CIPHER *EVP_des_ede(void)
185{
186	return &des_ede_ecb;
187}
188
189const EVP_CIPHER *EVP_des_ede3(void)
190{
191	return &des_ede3_ecb;
192}
193#endif
194