e_des3.c revision 264331 
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#include <stdio.h>
60#include "cryptlib.h"
61#ifndef OPENSSL_NO_DES
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#include "evp_locl.h"
65#include <openssl/des.h>
66#include <openssl/rand.h>
67
68#ifndef OPENSSL_FIPS
69
70static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
71			    const unsigned char *iv,int enc);
72
73static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
74			     const unsigned char *iv,int enc);
75
76static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
77
78typedef struct
79    {
80    DES_key_schedule ks1;/* key schedule */
81    DES_key_schedule ks2;/* key schedule (for ede) */
82    DES_key_schedule ks3;/* key schedule (for ede3) */
83    } DES_EDE_KEY;
84
85#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
86
87/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
88
89static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
90			      const unsigned char *in, size_t inl)
91{
92	BLOCK_CIPHER_ecb_loop()
93		DES_ecb3_encrypt((const_DES_cblock *)(in + i),
94				 (DES_cblock *)(out + i),
95				 &data(ctx)->ks1, &data(ctx)->ks2,
96				 &data(ctx)->ks3,
97				 ctx->encrypt);
98	return 1;
99}
100
101static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
102			      const unsigned char *in, size_t inl)
103{
104	while (inl>=EVP_MAXCHUNK)
105		{
106		DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
107			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
108			       (DES_cblock *)ctx->iv, &ctx->num);
109		inl-=EVP_MAXCHUNK;
110		in +=EVP_MAXCHUNK;
111		out+=EVP_MAXCHUNK;
112		}
113	if (inl)
114		DES_ede3_ofb64_encrypt(in, out, (long)inl,
115				&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
116                               (DES_cblock *)ctx->iv, &ctx->num);
117
118	return 1;
119}
120
121static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
122			      const unsigned char *in, size_t inl)
123{
124#ifdef KSSL_DEBUG
125	{
126        int i;
127        char *cp;
128	printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
129	printf("\t iv= ");
130        for(i=0;i<8;i++)
131                printf("%02X",ctx->iv[i]);
132	printf("\n");
133	}
134#endif    /* KSSL_DEBUG */
135	while (inl>=EVP_MAXCHUNK)
136		{
137		DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
138			     &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
139			     (DES_cblock *)ctx->iv, ctx->encrypt);
140		inl-=EVP_MAXCHUNK;
141		in +=EVP_MAXCHUNK;
142		out+=EVP_MAXCHUNK;
143		}
144	if (inl)
145		DES_ede3_cbc_encrypt(in, out, (long)inl,
146			     &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
147                             (DES_cblock *)ctx->iv, ctx->encrypt);
148	return 1;
149}
150
151static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
152			      const unsigned char *in, size_t inl)
153{
154	while (inl>=EVP_MAXCHUNK)
155		{
156		DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
157			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
158			       (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
159		inl-=EVP_MAXCHUNK;
160		in +=EVP_MAXCHUNK;
161		out+=EVP_MAXCHUNK;
162		}
163	if (inl)
164		DES_ede3_cfb64_encrypt(in, out, (long)inl,
165			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
166                               (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
167	return 1;
168}
169
170/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
171   way, so wrap it here */
172static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
173				const unsigned char *in, size_t inl)
174    {
175    size_t n;
176    unsigned char c[1],d[1];
177
178    for(n=0 ; n < inl ; ++n)
179	{
180	c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
181	DES_ede3_cfb_encrypt(c,d,1,1,
182			     &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
183			     (DES_cblock *)ctx->iv,ctx->encrypt);
184	out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
185		 ((d[0]&0x80) >> (unsigned int)(n%8));
186	}
187
188    return 1;
189    }
190
191static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
192				const unsigned char *in, size_t inl)
193    {
194    while (inl>=EVP_MAXCHUNK)
195	{
196	DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
197			 &data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
198			 (DES_cblock *)ctx->iv,ctx->encrypt);
199	inl-=EVP_MAXCHUNK;
200	in +=EVP_MAXCHUNK;
201	out+=EVP_MAXCHUNK;
202	}
203    if (inl)
204	DES_ede3_cfb_encrypt(in,out,8,(long)inl,
205			&data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
206			(DES_cblock *)ctx->iv,ctx->encrypt);
207    return 1;
208    }
209
210BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
211			EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
212			EVP_CIPHER_set_asn1_iv,
213			EVP_CIPHER_get_asn1_iv,
214			des3_ctrl)
215
216#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
217#define des_ede3_ofb_cipher des_ede_ofb_cipher
218#define des_ede3_cbc_cipher des_ede_cbc_cipher
219#define des_ede3_ecb_cipher des_ede_ecb_cipher
220
221BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
222			EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
223			EVP_CIPHER_set_asn1_iv,
224			EVP_CIPHER_get_asn1_iv,
225			des3_ctrl)
226
227BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
228		     EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
229		     EVP_CIPHER_set_asn1_iv,
230		     EVP_CIPHER_get_asn1_iv,
231		     des3_ctrl)
232
233BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
234		     EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
235		     EVP_CIPHER_set_asn1_iv,
236		     EVP_CIPHER_get_asn1_iv,
237		     des3_ctrl)
238
239static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
240			    const unsigned char *iv, int enc)
241	{
242	DES_cblock *deskey = (DES_cblock *)key;
243#ifdef EVP_CHECK_DES_KEY
244	if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
245		!! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
246		return 0;
247#else
248	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
249	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
250#endif
251	memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
252	       sizeof(data(ctx)->ks1));
253	return 1;
254	}
255
256static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
257			     const unsigned char *iv, int enc)
258	{
259	DES_cblock *deskey = (DES_cblock *)key;
260#ifdef KSSL_DEBUG
261	{
262        int i;
263        printf("des_ede3_init_key(ctx=%lx)\n", ctx);
264	printf("\tKEY= ");
265        for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
266	printf("\t IV= ");
267        for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
268	}
269#endif	/* KSSL_DEBUG */
270
271#ifdef EVP_CHECK_DES_KEY
272	if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
273		|| DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
274		|| DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
275		return 0;
276#else
277	DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
278	DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
279	DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
280#endif
281	return 1;
282	}
283
284static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
285	{
286
287	DES_cblock *deskey = ptr;
288
289	switch(type)
290		{
291	case EVP_CTRL_RAND_KEY:
292		if (RAND_bytes(ptr, c->key_len) <= 0)
293			return 0;
294		DES_set_odd_parity(deskey);
295		if (c->key_len >= 16)
296			DES_set_odd_parity(deskey + 1);
297		if (c->key_len >= 24)
298			DES_set_odd_parity(deskey + 2);
299		return 1;
300
301	default:
302		return -1;
303		}
304	}
305
306const EVP_CIPHER *EVP_des_ede(void)
307{
308	return &des_ede_ecb;
309}
310
311const EVP_CIPHER *EVP_des_ede3(void)
312{
313	return &des_ede3_ecb;
314}
315#endif
316#endif
317