Import OpenSSL-1.0.1a.
[dragonfly.git] / crypto / openssl / crypto / evp / e_rc4_hmac_md5.c
CommitLineData
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1/* ====================================================================
2 * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20 *
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * licensing@OpenSSL.org.
25 *
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
29 *
30 * 6. Redistributions of any form whatsoever must retain the following
31 * acknowledgment:
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34 *
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
48 */
49
50#include <openssl/opensslconf.h>
51
52#include <stdio.h>
53#include <string.h>
54
55#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
56
57#include <openssl/evp.h>
58#include <openssl/objects.h>
59#include <openssl/rc4.h>
60#include <openssl/md5.h>
61
62#ifndef EVP_CIPH_FLAG_AEAD_CIPHER
63#define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
64#define EVP_CTRL_AEAD_TLS1_AAD 0x16
65#define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
66#endif
67
68/* FIXME: surely this is available elsewhere? */
69#define EVP_RC4_KEY_SIZE 16
70
71typedef struct
72 {
73 RC4_KEY ks;
74 MD5_CTX head,tail,md;
75 size_t payload_length;
76 } EVP_RC4_HMAC_MD5;
77
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78#define NO_PAYLOAD_LENGTH ((size_t)-1)
79
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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 rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
86 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),
92 inkey);
93
94 MD5_Init(&key->head); /* handy when benchmarking */
95 key->tail = key->head;
96 key->md = key->head;
97
503f6d4b 98 key->payload_length = NO_PAYLOAD_LENGTH;
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99
100 return 1;
101 }
102
103#if !defined(OPENSSL_NO_ASM) && ( \
104 defined(__x86_64) || defined(__x86_64__) || \
105 defined(_M_AMD64) || defined(_M_X64) || \
503f6d4b 106 defined(__INTEL__) )
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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 rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
116 const unsigned char *in, size_t len)
117 {
118 EVP_RC4_HMAC_MD5 *key = data(ctx);
119#if defined(STITCHED_CALL)
120 size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */
121 md5_off = MD5_CBLOCK-key->md.num,
122 blocks;
123 unsigned int l;
124#endif
125 size_t plen = key->payload_length;
126
503f6d4b 127 if (plen!=NO_PAYLOAD_LENGTH && len!=(plen+MD5_DIGEST_LENGTH)) return 0;
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128
129 if (ctx->encrypt) {
503f6d4b 130 if (plen==NO_PAYLOAD_LENGTH) plen = len;
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131#if defined(STITCHED_CALL)
132 /* cipher has to "fall behind" */
133 if (rc4_off>md5_off) md5_off+=MD5_CBLOCK;
134
135 if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK)) {
136 MD5_Update(&key->md,in,md5_off);
137 RC4(&key->ks,rc4_off,in,out);
138
139 rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
140 &key->md,in+md5_off,blocks);
141 blocks *= MD5_CBLOCK;
142 rc4_off += blocks;
143 md5_off += blocks;
144 key->md.Nh += blocks>>29;
145 key->md.Nl += blocks<<=3;
146 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
147 } else {
148 rc4_off = 0;
149 md5_off = 0;
150 }
151#endif
152 MD5_Update(&key->md,in+md5_off,plen-md5_off);
153
154 if (plen!=len) { /* "TLS" mode of operation */
155 if (in!=out)
156 memcpy(out+rc4_off,in+rc4_off,plen-rc4_off);
157
158 /* calculate HMAC and append it to payload */
159 MD5_Final(out+plen,&key->md);
160 key->md = key->tail;
161 MD5_Update(&key->md,out+plen,MD5_DIGEST_LENGTH);
162 MD5_Final(out+plen,&key->md);
163 /* encrypt HMAC at once */
164 RC4(&key->ks,len-rc4_off,out+rc4_off,out+rc4_off);
165 } else {
166 RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
167 }
168 } else {
169 unsigned char mac[MD5_DIGEST_LENGTH];
170#if defined(STITCHED_CALL)
171 /* digest has to "fall behind" */
172 if (md5_off>rc4_off) rc4_off += 2*MD5_CBLOCK;
173 else rc4_off += MD5_CBLOCK;
174
175 if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK)) {
176 RC4(&key->ks,rc4_off,in,out);
177 MD5_Update(&key->md,out,md5_off);
178
179 rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
180 &key->md,out+md5_off,blocks);
181 blocks *= MD5_CBLOCK;
182 rc4_off += blocks;
183 md5_off += blocks;
184 l = (key->md.Nl+(blocks<<3))&0xffffffffU;
185 if (l<key->md.Nl) key->md.Nh++;
186 key->md.Nl = l;
187 key->md.Nh += blocks>>29;
188 } else {
189 md5_off=0;
190 rc4_off=0;
191 }
192#endif
193 /* decrypt HMAC at once */
194 RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
503f6d4b 195 if (plen!=NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
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196 MD5_Update(&key->md,out+md5_off,plen-md5_off);
197
198 /* calculate HMAC and verify it */
199 MD5_Final(mac,&key->md);
200 key->md = key->tail;
201 MD5_Update(&key->md,mac,MD5_DIGEST_LENGTH);
202 MD5_Final(mac,&key->md);
203
204 if (memcmp(out+plen,mac,MD5_DIGEST_LENGTH))
205 return 0;
206 } else {
207 MD5_Update(&key->md,out+md5_off,len-md5_off);
208 }
209 }
210
503f6d4b 211 key->payload_length = NO_PAYLOAD_LENGTH;
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212
213 return 1;
214 }
215
216static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
217 {
218 EVP_RC4_HMAC_MD5 *key = data(ctx);
219
220 switch (type)
221 {
222 case EVP_CTRL_AEAD_SET_MAC_KEY:
223 {
224 unsigned int i;
225 unsigned char hmac_key[64];
226
227 memset (hmac_key,0,sizeof(hmac_key));
228
229 if (arg > (int)sizeof(hmac_key)) {
230 MD5_Init(&key->head);
231 MD5_Update(&key->head,ptr,arg);
232 MD5_Final(hmac_key,&key->head);
233 } else {
234 memcpy(hmac_key,ptr,arg);
235 }
236
237 for (i=0;i<sizeof(hmac_key);i++)
238 hmac_key[i] ^= 0x36; /* ipad */
239 MD5_Init(&key->head);
240 MD5_Update(&key->head,hmac_key,sizeof(hmac_key));
241
242 for (i=0;i<sizeof(hmac_key);i++)
243 hmac_key[i] ^= 0x36^0x5c; /* opad */
244 MD5_Init(&key->tail);
245 MD5_Update(&key->tail,hmac_key,sizeof(hmac_key));
246
247 return 1;
248 }
249 case EVP_CTRL_AEAD_TLS1_AAD:
250 {
251 unsigned char *p=ptr;
252 unsigned int len=p[arg-2]<<8|p[arg-1];
253
254 if (!ctx->encrypt)
255 {
256 len -= MD5_DIGEST_LENGTH;
257 p[arg-2] = len>>8;
258 p[arg-1] = len;
259 }
260 key->payload_length=len;
261 key->md = key->head;
262 MD5_Update(&key->md,p,arg);
263
264 return MD5_DIGEST_LENGTH;
265 }
266 default:
267 return -1;
268 }
269 }
270
271static EVP_CIPHER r4_hmac_md5_cipher=
272 {
273#ifdef NID_rc4_hmac_md5
274 NID_rc4_hmac_md5,
275#else
276 NID_undef,
277#endif
278 1,EVP_RC4_KEY_SIZE,0,
279 EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER,
280 rc4_hmac_md5_init_key,
281 rc4_hmac_md5_cipher,
282 NULL,
283 sizeof(EVP_RC4_HMAC_MD5),
284 NULL,
285 NULL,
286 rc4_hmac_md5_ctrl,
287 NULL
288 };
289
290const EVP_CIPHER *EVP_rc4_hmac_md5(void)
291 {
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292 extern unsigned int OPENSSL_ia32cap_P[];
293 /* RC4_CHAR flag ------------vvvvv */
294 return(OPENSSL_ia32cap_P[0]&(1<<20) ? NULL : &r4_hmac_md5_cipher);
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295 }
296#endif