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1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.] */
56 
57 #include <openssl/cipher.h>
58 #include <openssl/des.h>
59 #include <openssl/nid.h>
60 
61 #include "internal.h"
62 #include "../delocate.h"
63 
64 
65 typedef struct {
66   union {
67     double align;
68     DES_key_schedule ks;
69   } ks;
70 } EVP_DES_KEY;
71 
des_init_key(EVP_CIPHER_CTX * ctx,const uint8_t * key,const uint8_t * iv,int enc)72 static int des_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
73                         const uint8_t *iv, int enc) {
74   DES_cblock *deskey = (DES_cblock *)key;
75   EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
76 
77   DES_set_key(deskey, &dat->ks.ks);
78   return 1;
79 }
80 
des_cbc_cipher(EVP_CIPHER_CTX * ctx,uint8_t * out,const uint8_t * in,size_t in_len)81 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
82                           size_t in_len) {
83   EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
84 
85   DES_ncbc_encrypt(in, out, in_len, &dat->ks.ks, (DES_cblock *)ctx->iv,
86                    ctx->encrypt);
87 
88   return 1;
89 }
90 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_cbc)91 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_cbc) {
92   memset(out, 0, sizeof(EVP_CIPHER));
93   out->nid = NID_des_cbc;
94   out->block_size = 8;
95   out->key_len = 8;
96   out->iv_len = 8;
97   out->ctx_size = sizeof(EVP_DES_KEY);
98   out->flags = EVP_CIPH_CBC_MODE;
99   out->init = des_init_key;
100   out->cipher = des_cbc_cipher;
101 }
102 
des_ecb_cipher(EVP_CIPHER_CTX * ctx,uint8_t * out,const uint8_t * in,size_t in_len)103 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
104                           size_t in_len) {
105   if (in_len < ctx->cipher->block_size) {
106     return 1;
107   }
108   in_len -= ctx->cipher->block_size;
109 
110   EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
111   for (size_t i = 0; i <= in_len; i += ctx->cipher->block_size) {
112     DES_ecb_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i),
113                     &dat->ks.ks, ctx->encrypt);
114   }
115   return 1;
116 }
117 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_ecb)118 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_ecb) {
119   memset(out, 0, sizeof(EVP_CIPHER));
120   out->nid = NID_des_ecb;
121   out->block_size = 8;
122   out->key_len = 8;
123   out->iv_len = 0;
124   out->ctx_size = sizeof(EVP_DES_KEY);
125   out->flags = EVP_CIPH_ECB_MODE;
126   out->init = des_init_key;
127   out->cipher = des_ecb_cipher;
128 }
129 
130 typedef struct {
131   union {
132     double align;
133     DES_key_schedule ks[3];
134   } ks;
135 } DES_EDE_KEY;
136 
des_ede3_init_key(EVP_CIPHER_CTX * ctx,const uint8_t * key,const uint8_t * iv,int enc)137 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
138                              const uint8_t *iv, int enc) {
139   DES_cblock *deskey = (DES_cblock *)key;
140   DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
141 
142   DES_set_key(&deskey[0], &dat->ks.ks[0]);
143   DES_set_key(&deskey[1], &dat->ks.ks[1]);
144   DES_set_key(&deskey[2], &dat->ks.ks[2]);
145 
146   return 1;
147 }
148 
des_ede3_cbc_cipher(EVP_CIPHER_CTX * ctx,uint8_t * out,const uint8_t * in,size_t in_len)149 static int des_ede3_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
150                               const uint8_t *in, size_t in_len) {
151   DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
152 
153   DES_ede3_cbc_encrypt(in, out, in_len, &dat->ks.ks[0], &dat->ks.ks[1],
154                        &dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt);
155 
156   return 1;
157 }
158 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_ede3_cbc)159 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_ede3_cbc) {
160   memset(out, 0, sizeof(EVP_CIPHER));
161   out->nid = NID_des_ede3_cbc;
162   out->block_size = 8;
163   out->key_len = 24;
164   out->iv_len = 8;
165   out->ctx_size = sizeof(DES_EDE_KEY);
166   out->flags = EVP_CIPH_CBC_MODE;
167   out->init = des_ede3_init_key;
168   out->cipher = des_ede3_cbc_cipher;
169 }
170 
des_ede_init_key(EVP_CIPHER_CTX * ctx,const uint8_t * key,const uint8_t * iv,int enc)171 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
172                              const uint8_t *iv, int enc) {
173   DES_cblock *deskey = (DES_cblock *) key;
174   DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data;
175 
176   DES_set_key(&deskey[0], &dat->ks.ks[0]);
177   DES_set_key(&deskey[1], &dat->ks.ks[1]);
178   DES_set_key(&deskey[0], &dat->ks.ks[2]);
179 
180   return 1;
181 }
182 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_ede_cbc)183 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_ede_cbc) {
184   memset(out, 0, sizeof(EVP_CIPHER));
185   out->nid = NID_des_ede_cbc;
186   out->block_size = 8;
187   out->key_len = 16;
188   out->iv_len = 8;
189   out->ctx_size = sizeof(DES_EDE_KEY);
190   out->flags = EVP_CIPH_CBC_MODE;
191   out->init = des_ede_init_key;
192   out->cipher = des_ede3_cbc_cipher;
193 }
194 
des_ede_ecb_cipher(EVP_CIPHER_CTX * ctx,uint8_t * out,const uint8_t * in,size_t in_len)195 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
196                               const uint8_t *in, size_t in_len) {
197   if (in_len < ctx->cipher->block_size) {
198     return 1;
199   }
200   in_len -= ctx->cipher->block_size;
201 
202   DES_EDE_KEY *dat = (DES_EDE_KEY *) ctx->cipher_data;
203   for (size_t i = 0; i <= in_len; i += ctx->cipher->block_size) {
204     DES_ecb3_encrypt((DES_cblock *) (in + i), (DES_cblock *) (out + i),
205                      &dat->ks.ks[0], &dat->ks.ks[1], &dat->ks.ks[2],
206                      ctx->encrypt);
207   }
208   return 1;
209 }
210 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_ede)211 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_ede) {
212   memset(out, 0, sizeof(EVP_CIPHER));
213   out->nid = NID_des_ede_ecb;
214   out->block_size = 8;
215   out->key_len = 16;
216   out->iv_len = 0;
217   out->ctx_size = sizeof(DES_EDE_KEY);
218   out->flags = EVP_CIPH_ECB_MODE;
219   out->init = des_ede_init_key;
220   out->cipher = des_ede_ecb_cipher;
221 }
222 
DEFINE_METHOD_FUNCTION(EVP_CIPHER,EVP_des_ede3)223 DEFINE_METHOD_FUNCTION(EVP_CIPHER, EVP_des_ede3) {
224   memset(out, 0, sizeof(EVP_CIPHER));
225   out->nid = NID_des_ede3_ecb;
226   out->block_size = 8;
227   out->key_len = 24;
228   out->iv_len = 0;
229   out->ctx_size = sizeof(DES_EDE_KEY);
230   out->flags = EVP_CIPH_ECB_MODE;
231   out->init = des_ede3_init_key;
232   out->cipher = des_ede_ecb_cipher;
233 }
234 
EVP_des_ede3_ecb(void)235 const EVP_CIPHER* EVP_des_ede3_ecb(void) {
236   return EVP_des_ede3();
237 }
238