Bring in the krb5 module in OpenSSL.
[dragonfly.git] / crypto / openssl / crypto / evp / e_rc4_hmac_md5.c
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672590bc
PA
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
78void rc4_md5_enc (RC4_KEY *key, const void *in0, void *out,
79 MD5_CTX *ctx,const void *inp,size_t blocks);
80
81#define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data)
82
83static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
84 const unsigned char *inkey,
85 const unsigned char *iv, int enc)
86 {
87 EVP_RC4_HMAC_MD5 *key = data(ctx);
88
89 RC4_set_key(&key->ks,EVP_CIPHER_CTX_key_length(ctx),
90 inkey);
91
92 MD5_Init(&key->head); /* handy when benchmarking */
93 key->tail = key->head;
94 key->md = key->head;
95
96 key->payload_length = 0;
97
98 return 1;
99 }
100
101#if !defined(OPENSSL_NO_ASM) && ( \
102 defined(__x86_64) || defined(__x86_64__) || \
103 defined(_M_AMD64) || defined(_M_X64) || \
104 defined(__INTEL__) ) && \
105 !(defined(__APPLE__) && defined(__MACH__))
106#define STITCHED_CALL
107#endif
108
109#if !defined(STITCHED_CALL)
110#define rc4_off 0
111#define md5_off 0
112#endif
113
114static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
115 const unsigned char *in, size_t len)
116 {
117 EVP_RC4_HMAC_MD5 *key = data(ctx);
118#if defined(STITCHED_CALL)
119 size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */
120 md5_off = MD5_CBLOCK-key->md.num,
121 blocks;
122 unsigned int l;
123#endif
124 size_t plen = key->payload_length;
125
126 if (plen && len!=(plen+MD5_DIGEST_LENGTH)) return 0;
127
128 if (ctx->encrypt) {
129 if (plen==0) plen = len;
130#if defined(STITCHED_CALL)
131 /* cipher has to "fall behind" */
132 if (rc4_off>md5_off) md5_off+=MD5_CBLOCK;
133
134 if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK)) {
135 MD5_Update(&key->md,in,md5_off);
136 RC4(&key->ks,rc4_off,in,out);
137
138 rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
139 &key->md,in+md5_off,blocks);
140 blocks *= MD5_CBLOCK;
141 rc4_off += blocks;
142 md5_off += blocks;
143 key->md.Nh += blocks>>29;
144 key->md.Nl += blocks<<=3;
145 if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
146 } else {
147 rc4_off = 0;
148 md5_off = 0;
149 }
150#endif
151 MD5_Update(&key->md,in+md5_off,plen-md5_off);
152
153 if (plen!=len) { /* "TLS" mode of operation */
154 if (in!=out)
155 memcpy(out+rc4_off,in+rc4_off,plen-rc4_off);
156
157 /* calculate HMAC and append it to payload */
158 MD5_Final(out+plen,&key->md);
159 key->md = key->tail;
160 MD5_Update(&key->md,out+plen,MD5_DIGEST_LENGTH);
161 MD5_Final(out+plen,&key->md);
162 /* encrypt HMAC at once */
163 RC4(&key->ks,len-rc4_off,out+rc4_off,out+rc4_off);
164 } else {
165 RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
166 }
167 } else {
168 unsigned char mac[MD5_DIGEST_LENGTH];
169#if defined(STITCHED_CALL)
170 /* digest has to "fall behind" */
171 if (md5_off>rc4_off) rc4_off += 2*MD5_CBLOCK;
172 else rc4_off += MD5_CBLOCK;
173
174 if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK)) {
175 RC4(&key->ks,rc4_off,in,out);
176 MD5_Update(&key->md,out,md5_off);
177
178 rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
179 &key->md,out+md5_off,blocks);
180 blocks *= MD5_CBLOCK;
181 rc4_off += blocks;
182 md5_off += blocks;
183 l = (key->md.Nl+(blocks<<3))&0xffffffffU;
184 if (l<key->md.Nl) key->md.Nh++;
185 key->md.Nl = l;
186 key->md.Nh += blocks>>29;
187 } else {
188 md5_off=0;
189 rc4_off=0;
190 }
191#endif
192 /* decrypt HMAC at once */
193 RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
194 if (plen) { /* "TLS" mode of operation */
195 MD5_Update(&key->md,out+md5_off,plen-md5_off);
196
197 /* calculate HMAC and verify it */
198 MD5_Final(mac,&key->md);
199 key->md = key->tail;
200 MD5_Update(&key->md,mac,MD5_DIGEST_LENGTH);
201 MD5_Final(mac,&key->md);
202
203 if (memcmp(out+plen,mac,MD5_DIGEST_LENGTH))
204 return 0;
205 } else {
206 MD5_Update(&key->md,out+md5_off,len-md5_off);
207 }
208 }
209
210 key->payload_length = 0;
211
212 return 1;
213 }
214
215static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
216 {
217 EVP_RC4_HMAC_MD5 *key = data(ctx);
218
219 switch (type)
220 {
221 case EVP_CTRL_AEAD_SET_MAC_KEY:
222 {
223 unsigned int i;
224 unsigned char hmac_key[64];
225
226 memset (hmac_key,0,sizeof(hmac_key));
227
228 if (arg > (int)sizeof(hmac_key)) {
229 MD5_Init(&key->head);
230 MD5_Update(&key->head,ptr,arg);
231 MD5_Final(hmac_key,&key->head);
232 } else {
233 memcpy(hmac_key,ptr,arg);
234 }
235
236 for (i=0;i<sizeof(hmac_key);i++)
237 hmac_key[i] ^= 0x36; /* ipad */
238 MD5_Init(&key->head);
239 MD5_Update(&key->head,hmac_key,sizeof(hmac_key));
240
241 for (i=0;i<sizeof(hmac_key);i++)
242 hmac_key[i] ^= 0x36^0x5c; /* opad */
243 MD5_Init(&key->tail);
244 MD5_Update(&key->tail,hmac_key,sizeof(hmac_key));
245
246 return 1;
247 }
248 case EVP_CTRL_AEAD_TLS1_AAD:
249 {
250 unsigned char *p=ptr;
251 unsigned int len=p[arg-2]<<8|p[arg-1];
252
253 if (!ctx->encrypt)
254 {
255 len -= MD5_DIGEST_LENGTH;
256 p[arg-2] = len>>8;
257 p[arg-1] = len;
258 }
259 key->payload_length=len;
260 key->md = key->head;
261 MD5_Update(&key->md,p,arg);
262
263 return MD5_DIGEST_LENGTH;
264 }
265 default:
266 return -1;
267 }
268 }
269
270static EVP_CIPHER r4_hmac_md5_cipher=
271 {
272#ifdef NID_rc4_hmac_md5
273 NID_rc4_hmac_md5,
274#else
275 NID_undef,
276#endif
277 1,EVP_RC4_KEY_SIZE,0,
278 EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER,
279 rc4_hmac_md5_init_key,
280 rc4_hmac_md5_cipher,
281 NULL,
282 sizeof(EVP_RC4_HMAC_MD5),
283 NULL,
284 NULL,
285 rc4_hmac_md5_ctrl,
286 NULL
287 };
288
289const EVP_CIPHER *EVP_rc4_hmac_md5(void)
290 {
291 return(&r4_hmac_md5_cipher);
292 }
293#endif