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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 | ||
58 | #include <stdio.h> | |
59 | #include "internal/cryptlib.h" | |
60 | #ifndef OPENSSL_NO_DES | |
61 | # include <openssl/evp.h> | |
62 | # include <openssl/objects.h> | |
63 | # include "internal/evp_int.h" | |
64 | # include <openssl/des.h> | |
65 | # include <openssl/rand.h> | |
66 | ||
67 | typedef struct { | |
68 | union { | |
69 | double align; | |
70 | DES_key_schedule ks; | |
71 | } ks; | |
72 | union { | |
73 | void (*cbc) (const void *, void *, size_t, const void *, void *); | |
74 | } stream; | |
75 | } EVP_DES_KEY; | |
76 | ||
77 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) | |
78 | /* ---------^^^ this is not a typo, just a way to detect that | |
79 | * assembler support was in general requested... */ | |
80 | # include "sparc_arch.h" | |
81 | ||
82 | extern unsigned int OPENSSL_sparcv9cap_P[]; | |
83 | ||
84 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) | |
85 | ||
86 | void des_t4_key_expand(const void *key, DES_key_schedule *ks); | |
87 | void des_t4_cbc_encrypt(const void *inp, void *out, size_t len, | |
88 | DES_key_schedule *ks, unsigned char iv[8]); | |
89 | void des_t4_cbc_decrypt(const void *inp, void *out, size_t len, | |
90 | DES_key_schedule *ks, unsigned char iv[8]); | |
91 | # endif | |
92 | ||
93 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
94 | const unsigned char *iv, int enc); | |
95 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); | |
96 | ||
97 | /* | |
98 | * Because of various casts and different names can't use | |
99 | * IMPLEMENT_BLOCK_CIPHER | |
100 | */ | |
101 | ||
102 | static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
103 | const unsigned char *in, size_t inl) | |
104 | { | |
105 | BLOCK_CIPHER_ecb_loop() | |
106 | DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), | |
107 | EVP_CIPHER_CTX_cipher_data(ctx), | |
108 | EVP_CIPHER_CTX_encrypting(ctx)); | |
109 | return 1; | |
110 | } | |
111 | ||
112 | static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
113 | const unsigned char *in, size_t inl) | |
114 | { | |
115 | while (inl >= EVP_MAXCHUNK) { | |
116 | int num = EVP_CIPHER_CTX_num(ctx); | |
117 | DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, | |
118 | EVP_CIPHER_CTX_cipher_data(ctx), | |
119 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num); | |
120 | EVP_CIPHER_CTX_set_num(ctx, num); | |
121 | inl -= EVP_MAXCHUNK; | |
122 | in += EVP_MAXCHUNK; | |
123 | out += EVP_MAXCHUNK; | |
124 | } | |
125 | if (inl) { | |
126 | int num = EVP_CIPHER_CTX_num(ctx); | |
127 | DES_ofb64_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx), | |
128 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num); | |
129 | EVP_CIPHER_CTX_set_num(ctx, num); | |
130 | } | |
131 | return 1; | |
132 | } | |
133 | ||
134 | static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
135 | const unsigned char *in, size_t inl) | |
136 | { | |
137 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_cipher_data(ctx); | |
138 | ||
139 | if (dat->stream.cbc) { | |
140 | (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, EVP_CIPHER_CTX_iv_noconst(ctx)); | |
141 | return 1; | |
142 | } | |
143 | while (inl >= EVP_MAXCHUNK) { | |
144 | DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, EVP_CIPHER_CTX_cipher_data(ctx), | |
145 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx)); | |
146 | inl -= EVP_MAXCHUNK; | |
147 | in += EVP_MAXCHUNK; | |
148 | out += EVP_MAXCHUNK; | |
149 | } | |
150 | if (inl) | |
151 | DES_ncbc_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx), | |
152 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx)); | |
153 | return 1; | |
154 | } | |
155 | ||
156 | static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
157 | const unsigned char *in, size_t inl) | |
158 | { | |
159 | while (inl >= EVP_MAXCHUNK) { | |
160 | int num = EVP_CIPHER_CTX_num(ctx); | |
161 | DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, | |
162 | EVP_CIPHER_CTX_cipher_data(ctx), | |
163 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num, | |
164 | EVP_CIPHER_CTX_encrypting(ctx)); | |
165 | EVP_CIPHER_CTX_set_num(ctx, num); | |
166 | inl -= EVP_MAXCHUNK; | |
167 | in += EVP_MAXCHUNK; | |
168 | out += EVP_MAXCHUNK; | |
169 | } | |
170 | if (inl) { | |
171 | int num = EVP_CIPHER_CTX_num(ctx); | |
172 | DES_cfb64_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx), | |
173 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num, | |
174 | EVP_CIPHER_CTX_encrypting(ctx)); | |
175 | EVP_CIPHER_CTX_set_num(ctx, num); | |
176 | } | |
177 | return 1; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Although we have a CFB-r implementation for DES, it doesn't pack the right | |
182 | * way, so wrap it here | |
183 | */ | |
184 | static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
185 | const unsigned char *in, size_t inl) | |
186 | { | |
187 | size_t n, chunk = EVP_MAXCHUNK / 8; | |
188 | unsigned char c[1], d[1]; | |
189 | ||
190 | if (inl < chunk) | |
191 | chunk = inl; | |
192 | ||
193 | while (inl && inl >= chunk) { | |
194 | for (n = 0; n < chunk * 8; ++n) { | |
195 | c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; | |
196 | DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_cipher_data(ctx), | |
197 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx)); | |
198 | out[n / 8] = | |
199 | (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | | |
200 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); | |
201 | } | |
202 | inl -= chunk; | |
203 | in += chunk; | |
204 | out += chunk; | |
205 | if (inl < chunk) | |
206 | chunk = inl; | |
207 | } | |
208 | ||
209 | return 1; | |
210 | } | |
211 | ||
212 | static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, | |
213 | const unsigned char *in, size_t inl) | |
214 | { | |
215 | while (inl >= EVP_MAXCHUNK) { | |
216 | DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, EVP_CIPHER_CTX_cipher_data(ctx), | |
217 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx)); | |
218 | inl -= EVP_MAXCHUNK; | |
219 | in += EVP_MAXCHUNK; | |
220 | out += EVP_MAXCHUNK; | |
221 | } | |
222 | if (inl) | |
223 | DES_cfb_encrypt(in, out, 8, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx), | |
224 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx)); | |
225 | return 1; | |
226 | } | |
227 | ||
228 | BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64, | |
229 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
230 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
231 | ||
232 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1, | |
233 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
234 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
235 | ||
236 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8, | |
237 | EVP_CIPH_RAND_KEY, des_init_key, NULL, | |
238 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) | |
239 | ||
240 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
241 | const unsigned char *iv, int enc) | |
242 | { | |
243 | DES_cblock *deskey = (DES_cblock *)key; | |
244 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_cipher_data(ctx); | |
245 | ||
246 | dat->stream.cbc = NULL; | |
247 | # if defined(SPARC_DES_CAPABLE) | |
248 | if (SPARC_DES_CAPABLE) { | |
249 | int mode = EVP_CIPHER_CTX_mode(ctx); | |
250 | ||
251 | if (mode == EVP_CIPH_CBC_MODE) { | |
252 | des_t4_key_expand(key, &dat->ks.ks); | |
253 | dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt; | |
254 | return 1; | |
255 | } | |
256 | } | |
257 | # endif | |
258 | DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_cipher_data(ctx)); | |
259 | return 1; | |
260 | } | |
261 | ||
262 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
263 | { | |
264 | ||
265 | switch (type) { | |
266 | case EVP_CTRL_RAND_KEY: | |
267 | if (RAND_bytes(ptr, 8) <= 0) | |
268 | return 0; | |
269 | DES_set_odd_parity((DES_cblock *)ptr); | |
270 | return 1; | |
271 | ||
272 | default: | |
273 | return -1; | |
274 | } | |
275 | } | |
276 | ||
277 | #endif |