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diff --git a/src/lib/libcrypto/evp/e_rc4_hmac_md5.c b/src/lib/libcrypto/evp/e_rc4_hmac_md5.c
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--- a/src/lib/libcrypto/evp/e_rc4_hmac_md5.c
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1/* $OpenBSD: e_rc4_hmac_md5.c,v 1.5 2014/08/11 13:29:43 bcook Exp $ */
2/* ====================================================================
3 * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * licensing@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 */
50
51#include <stdio.h>
52#include <string.h>
53
54#include <openssl/opensslconf.h>
55
56#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
57
58#include <openssl/evp.h>
59#include <openssl/objects.h>
60#include <openssl/rc4.h>
61#include <openssl/md5.h>
62
63#ifndef EVP_CIPH_FLAG_AEAD_CIPHER
64#define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
65#define EVP_CTRL_AEAD_TLS1_AAD 0x16
66#define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
67#endif
68
69/* FIXME: surely this is available elsewhere? */
70#define EVP_RC4_KEY_SIZE 16
71
72typedef struct {
73 RC4_KEY ks;
74 MD5_CTX head, tail, md;
75 size_t payload_length;
76} EVP_RC4_HMAC_MD5;
77
78#define NO_PAYLOAD_LENGTH ((size_t)-1)
79
80void rc4_md5_enc (RC4_KEY *key, const void *in0, void *out,
81 MD5_CTX *ctx, const void *inp, size_t blocks);
82
83#define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data)
84
85static int
86rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *inkey,
87 const unsigned char *iv, int enc)
88{
89 EVP_RC4_HMAC_MD5 *key = data(ctx);
90
91 RC4_set_key(&key->ks, EVP_CIPHER_CTX_key_length(ctx), inkey);
92
93 MD5_Init(&key->head); /* handy when benchmarking */
94 key->tail = key->head;
95 key->md = key->head;
96
97 key->payload_length = NO_PAYLOAD_LENGTH;
98
99 return 1;
100}
101
102#if !defined(OPENSSL_NO_ASM) && defined(RC4_MD5_ASM) && ( \
103 defined(__x86_64) || defined(__x86_64__) || \
104 defined(_M_AMD64) || defined(_M_X64) || \
105 defined(__INTEL__) ) && \
106 !(defined(__APPLE__) && defined(__MACH__))
107#define STITCHED_CALL
108#endif
109
110#if !defined(STITCHED_CALL)
111#define rc4_off 0
112#define md5_off 0
113#endif
114
115static int
116rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
117 const unsigned char *in, size_t len)
118{
119 EVP_RC4_HMAC_MD5 *key = data(ctx);
120#if defined(STITCHED_CALL)
121 size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */
122 md5_off = MD5_CBLOCK - key->md.num,
123 blocks;
124 unsigned int l;
125 extern unsigned int OPENSSL_ia32cap_P[];
126#endif
127 size_t plen = key->payload_length;
128
129 if (plen != NO_PAYLOAD_LENGTH && len != (plen + MD5_DIGEST_LENGTH))
130 return 0;
131
132 if (ctx->encrypt) {
133 if (plen == NO_PAYLOAD_LENGTH)
134 plen = len;
135#if defined(STITCHED_CALL)
136 /* cipher has to "fall behind" */
137 if (rc4_off > md5_off)
138 md5_off += MD5_CBLOCK;
139
140 if (plen > md5_off &&
141 (blocks = (plen - md5_off) / MD5_CBLOCK) &&
142 (OPENSSL_ia32cap_P[0]&(1 << 20)) == 0) {
143 MD5_Update(&key->md, in, md5_off);
144 RC4(&key->ks, rc4_off, in, out);
145
146 rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
147 &key->md, in + md5_off, blocks);
148 blocks *= MD5_CBLOCK;
149 rc4_off += blocks;
150 md5_off += blocks;
151 key->md.Nh += blocks >> 29;
152 key->md.Nl += blocks <<= 3;
153 if (key->md.Nl < (unsigned int)blocks)
154 key->md.Nh++;
155 } else {
156 rc4_off = 0;
157 md5_off = 0;
158 }
159#endif
160 MD5_Update(&key->md, in + md5_off, plen - md5_off);
161
162 if (plen!=len) { /* "TLS" mode of operation */
163 if (in != out)
164 memcpy(out + rc4_off, in + rc4_off,
165 plen - rc4_off);
166
167 /* calculate HMAC and append it to payload */
168 MD5_Final(out + plen, &key->md);
169 key->md = key->tail;
170 MD5_Update(&key->md, out + plen, MD5_DIGEST_LENGTH);
171 MD5_Final(out + plen, &key->md);
172
173 /* encrypt HMAC at once */
174 RC4(&key->ks, len - rc4_off, out + rc4_off,
175 out + rc4_off);
176 } else {
177 RC4(&key->ks, len - rc4_off, in + rc4_off,
178 out + rc4_off);
179 }
180 } else {
181 unsigned char mac[MD5_DIGEST_LENGTH];
182#if defined(STITCHED_CALL)
183 /* digest has to "fall behind" */
184 if (md5_off > rc4_off)
185 rc4_off += 2*MD5_CBLOCK;
186 else
187 rc4_off += MD5_CBLOCK;
188
189 if (len > rc4_off && (blocks = (len - rc4_off) / MD5_CBLOCK) &&
190 (OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
191 RC4(&key->ks, rc4_off, in, out);
192 MD5_Update(&key->md, out, md5_off);
193
194 rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
195 &key->md, out + md5_off, blocks);
196 blocks *= MD5_CBLOCK;
197 rc4_off += blocks;
198 md5_off += blocks;
199 l = (key->md.Nl + (blocks << 3)) & 0xffffffffU;
200 if (l < key->md.Nl)
201 key->md.Nh++;
202 key->md.Nl = l;
203 key->md.Nh += blocks >> 29;
204 } else {
205 md5_off = 0;
206 rc4_off = 0;
207 }
208#endif
209 /* decrypt HMAC at once */
210 RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
211 if (plen!=NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
212 MD5_Update(&key->md, out + md5_off, plen - md5_off);
213
214 /* calculate HMAC and verify it */
215 MD5_Final(mac, &key->md);
216 key->md = key->tail;
217 MD5_Update(&key->md, mac, MD5_DIGEST_LENGTH);
218 MD5_Final(mac, &key->md);
219
220 if (memcmp(out + plen, mac, MD5_DIGEST_LENGTH))
221 return 0;
222 } else {
223 MD5_Update(&key->md, out + md5_off, len - md5_off);
224 }
225 }
226
227 key->payload_length = NO_PAYLOAD_LENGTH;
228
229 return 1;
230}
231
232static int
233rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
234{
235 EVP_RC4_HMAC_MD5 *key = data(ctx);
236
237 switch (type) {
238 case EVP_CTRL_AEAD_SET_MAC_KEY:
239 {
240 unsigned int i;
241 unsigned char hmac_key[64];
242
243 memset (hmac_key, 0, sizeof(hmac_key));
244
245 if (arg > (int)sizeof(hmac_key)) {
246 MD5_Init(&key->head);
247 MD5_Update(&key->head, ptr, arg);
248 MD5_Final(hmac_key, &key->head);
249 } else {
250 memcpy(hmac_key, ptr, arg);
251 }
252
253 for (i = 0; i < sizeof(hmac_key); i++)
254 hmac_key[i] ^= 0x36; /* ipad */
255 MD5_Init(&key->head);
256 MD5_Update(&key->head, hmac_key, sizeof(hmac_key));
257
258 for (i = 0; i < sizeof(hmac_key); i++)
259 hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
260 MD5_Init(&key->tail);
261 MD5_Update(&key->tail, hmac_key, sizeof(hmac_key));
262
263 return 1;
264 }
265 case EVP_CTRL_AEAD_TLS1_AAD:
266 {
267 unsigned char *p = ptr;
268 unsigned int len = p[arg - 2] << 8 | p[arg - 1];
269
270 if (!ctx->encrypt) {
271 len -= MD5_DIGEST_LENGTH;
272 p[arg - 2] = len >> 8;
273 p[arg - 1] = len;
274 }
275 key->payload_length = len;
276 key->md = key->head;
277 MD5_Update(&key->md, p, arg);
278
279 return MD5_DIGEST_LENGTH;
280 }
281 default:
282 return -1;
283 }
284}
285
286static EVP_CIPHER r4_hmac_md5_cipher = {
287#ifdef NID_rc4_hmac_md5
288 NID_rc4_hmac_md5,
289#else
290 NID_undef,
291#endif
292 1, EVP_RC4_KEY_SIZE, 0,
293 EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER,
294 rc4_hmac_md5_init_key,
295 rc4_hmac_md5_cipher,
296 NULL,
297 sizeof(EVP_RC4_HMAC_MD5),
298 NULL,
299 NULL,
300 rc4_hmac_md5_ctrl,
301 NULL
302};
303
304const EVP_CIPHER *
305EVP_rc4_hmac_md5(void)
306{
307 return (&r4_hmac_md5_cipher);
308}
309#endif
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