aboutsummaryrefslogblamecommitdiffstats
path: root/patches/openssl-0.9.8d-tls-extensions.patch
blob: eec6db8a13410b2847d78670e4993721fb02211c (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429












































































































































































































































































































































































































































                                                                                                                                                    
This patch is adding support for TLS hello extensions and externally
generated pre-shared key material to OpenSSL 0.9.8d. This is
based on the patch from Alexey Kobozev <akobozev@cisco.com>
(sent to openssl-dev mailing list on Tue, 07 Jun 2005 15:40:58 +0300).



diff -uprN openssl-0.9.8d.orig/include/openssl/ssl.h openssl-0.9.8d/include/openssl/ssl.h
--- openssl-0.9.8d.orig/include/openssl/ssl.h	2006-06-14 06:52:49.000000000 -0700
+++ openssl-0.9.8d/include/openssl/ssl.h	2006-12-10 08:20:02.000000000 -0800
@@ -345,6 +345,7 @@ extern "C" {
  * 'struct ssl_st *' function parameters used to prototype callbacks
  * in SSL_CTX. */
 typedef struct ssl_st *ssl_crock_st;
+typedef struct tls_extension_st TLS_EXTENSION;
 
 /* used to hold info on the particular ciphers used */
 typedef struct ssl_cipher_st
@@ -366,6 +367,8 @@ DECLARE_STACK_OF(SSL_CIPHER)
 typedef struct ssl_st SSL;
 typedef struct ssl_ctx_st SSL_CTX;
 
+typedef int (*tls_session_secret_cb_fn)(SSL *s, void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg);
+
 /* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
 typedef struct ssl_method_st
 	{
@@ -973,6 +976,15 @@ struct ssl_st
 	int first_packet;
 	int client_version;	/* what was passed, used for
 				 * SSLv3/TLS rollback check */
+
+	/* TLS externsions */
+	TLS_EXTENSION *tls_extension;
+	int (*tls_extension_cb)(SSL *s, TLS_EXTENSION *tls_ext, void *arg);
+	void *tls_extension_cb_arg;
+
+	/* TLS pre-shared secret session resumption */
+	tls_session_secret_cb_fn tls_session_secret_cb;
+	void *tls_session_secret_cb_arg;
 	};
 
 #ifdef __cplusplus
@@ -1538,6 +1550,13 @@ void *SSL_COMP_get_compression_methods(v
 int SSL_COMP_add_compression_method(int id,void *cm);
 #endif
 
+/* TLS extensions functions */
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len);
+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg);
+
+/* Pre-shared secret session resumption functions */
+int SSL_set_session_secret_cb(SSL *s, tls_session_secret_cb_fn tls_session_secret_cb, void *arg);
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
@@ -1719,6 +1738,7 @@ void ERR_load_SSL_strings(void);
 #define SSL_F_TLS1_ENC					 210
 #define SSL_F_TLS1_SETUP_KEY_BLOCK			 211
 #define SSL_F_WRITE_PENDING				 212
+#define SSL_F_SSL_SET_HELLO_EXTENSION	 213
 
 /* Reason codes. */
 #define SSL_R_APP_DATA_IN_HANDSHAKE			 100
diff -uprN openssl-0.9.8d.orig/include/openssl/tls1.h openssl-0.9.8d/include/openssl/tls1.h
--- openssl-0.9.8d.orig/include/openssl/tls1.h	2006-06-14 10:52:01.000000000 -0700
+++ openssl-0.9.8d/include/openssl/tls1.h	2006-12-10 08:20:02.000000000 -0800
@@ -296,6 +296,14 @@ extern "C" {
 #define TLS_MD_MASTER_SECRET_CONST    "\x6d\x61\x73\x74\x65\x72\x20\x73\x65\x63\x72\x65\x74"  /*master secret*/
 #endif
 
+/* TLS extension struct */
+struct tls_extension_st
+{
+	unsigned short type;
+	unsigned short length;
+	void *data;
+};
+
 #ifdef  __cplusplus
 }
 #endif
diff -uprN openssl-0.9.8d.orig/ssl/Makefile openssl-0.9.8d/ssl/Makefile
--- openssl-0.9.8d.orig/ssl/Makefile	2006-02-03 17:49:35.000000000 -0800
+++ openssl-0.9.8d/ssl/Makefile	2006-12-10 08:20:02.000000000 -0800
@@ -24,7 +24,7 @@ LIBSRC=	\
 	s2_meth.c   s2_srvr.c s2_clnt.c  s2_lib.c  s2_enc.c s2_pkt.c \
 	s3_meth.c   s3_srvr.c s3_clnt.c  s3_lib.c  s3_enc.c s3_pkt.c s3_both.c \
 	s23_meth.c s23_srvr.c s23_clnt.c s23_lib.c          s23_pkt.c \
-	t1_meth.c   t1_srvr.c t1_clnt.c  t1_lib.c  t1_enc.c \
+	t1_meth.c   t1_srvr.c t1_clnt.c  t1_lib.c  t1_enc.c                    t1_ext.c \
 	d1_meth.c   d1_srvr.c d1_clnt.c  d1_lib.c  d1_pkt.c \
 	d1_both.c d1_enc.c \
 	ssl_lib.c ssl_err2.c ssl_cert.c ssl_sess.c \
@@ -35,7 +35,7 @@ LIBOBJ= \
 	s2_meth.o  s2_srvr.o  s2_clnt.o  s2_lib.o  s2_enc.o s2_pkt.o \
 	s3_meth.o  s3_srvr.o  s3_clnt.o  s3_lib.o  s3_enc.o s3_pkt.o s3_both.o \
 	s23_meth.o s23_srvr.o s23_clnt.o s23_lib.o          s23_pkt.o \
-	t1_meth.o   t1_srvr.o t1_clnt.o  t1_lib.o  t1_enc.o \
+	t1_meth.o   t1_srvr.o t1_clnt.o  t1_lib.o  t1_enc.o                    t1_ext.o \
 	d1_meth.o   d1_srvr.o d1_clnt.o  d1_lib.o  d1_pkt.o \
 	d1_both.o d1_enc.o \
 	ssl_lib.o ssl_err2.o ssl_cert.o ssl_sess.o \
@@ -968,3 +968,4 @@ t1_srvr.o: ../include/openssl/ssl23.h ..
 t1_srvr.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
 t1_srvr.o: ../include/openssl/tls1.h ../include/openssl/x509.h
 t1_srvr.o: ../include/openssl/x509_vfy.h ssl_locl.h t1_srvr.c
+t1_ext.o: t1_ext.c ssl_locl.h
diff -uprN openssl-0.9.8d.orig/ssl/s3_clnt.c openssl-0.9.8d/ssl/s3_clnt.c
--- openssl-0.9.8d.orig/ssl/s3_clnt.c	2005-12-12 23:41:46.000000000 -0800
+++ openssl-0.9.8d/ssl/s3_clnt.c	2006-12-10 08:20:02.000000000 -0800
@@ -601,6 +601,20 @@ int ssl3_client_hello(SSL *s)
 #endif
 		*(p++)=0; /* Add the NULL method */
 		
+		/* send client hello extensions if any */
+		if (s->version >= TLS1_VERSION && s->tls_extension)
+		{
+			// set the total extensions length
+			s2n(s->tls_extension->length + 4, p);
+
+			// put the extensions with type and length
+			s2n(s->tls_extension->type, p);
+			s2n(s->tls_extension->length, p);
+			
+			memcpy(p, s->tls_extension->data, s->tls_extension->length);
+			p+=s->tls_extension->length;
+		}
+
 		l=(p-d);
 		d=buf;
 		*(d++)=SSL3_MT_CLIENT_HELLO;
@@ -623,7 +637,7 @@ int ssl3_get_server_hello(SSL *s)
 	STACK_OF(SSL_CIPHER) *sk;
 	SSL_CIPHER *c;
 	unsigned char *p,*d;
-	int i,al,ok;
+	int i,al,ok,pre_shared;
 	unsigned int j;
 	long n;
 #ifndef OPENSSL_NO_COMP
@@ -690,7 +704,24 @@ int ssl3_get_server_hello(SSL *s)
 		goto f_err;
 		}
 
-	if (j != 0 && j == s->session->session_id_length
+	/* check if we want to resume the session based on external pre-shared secret */
+	pre_shared = 0;
+	if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
+	{
+		SSL_CIPHER *pref_cipher=NULL;
+		s->session->master_key_length=sizeof(s->session->master_key);
+		if (s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length,
+			NULL, &pref_cipher, s->tls_session_secret_cb_arg))
+		{
+			s->hit=1;
+			s->session->cipher=pref_cipher ? pref_cipher : ssl_get_cipher_by_char(s,p+j);
+			s->session->session_id_length = j;
+			memcpy(s->session->session_id, p, j);
+			pre_shared = 1;
+		}
+	}
+
+	if ((pre_shared || j != 0) && j == s->session->session_id_length
 	    && memcmp(p,s->session->session_id,j) == 0)
 	    {
 	    if(s->sid_ctx_length != s->session->sid_ctx_length
diff -uprN openssl-0.9.8d.orig/ssl/s3_srvr.c openssl-0.9.8d/ssl/s3_srvr.c
--- openssl-0.9.8d.orig/ssl/s3_srvr.c	2006-09-28 04:29:03.000000000 -0700
+++ openssl-0.9.8d/ssl/s3_srvr.c	2006-12-10 08:20:02.000000000 -0800
@@ -943,6 +943,75 @@ int ssl3_get_client_hello(SSL *s)
 		}
 #endif
 
+	/* Check for TLS client hello extension here */
+	if (p < (d+n) && s->version >= TLS1_VERSION)
+	{
+		if (s->tls_extension_cb)
+		{
+			TLS_EXTENSION tls_ext;
+			unsigned short ext_total_len;
+			
+			n2s(p, ext_total_len);
+			n2s(p, tls_ext.type);
+			n2s(p, tls_ext.length);
+
+			// sanity check in TLS extension len
+			if (tls_ext.length > (d+n) - p)
+			{
+				// just cut the lenth to packet border
+				tls_ext.length = (d+n) - p;
+			}
+
+			tls_ext.data = p;
+
+			// returns an alert code or 0
+			al = s->tls_extension_cb(s, &tls_ext, s->tls_extension_cb_arg);
+			if (al != 0)
+			{
+				SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
+				goto f_err;
+			}
+		}
+	}
+
+	/* Check if we want to use external pre-shared secret for this handshake */
+	/* for not reused session only */
+	if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb)
+	{
+		SSL_CIPHER *pref_cipher=NULL;
+
+		s->session->master_key_length=sizeof(s->session->master_key);
+		if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, 
+			ciphers, &pref_cipher, s->tls_session_secret_cb_arg))
+		{
+			s->hit=1;
+			s->session->ciphers=ciphers;
+			s->session->verify_result=X509_V_OK;
+			
+			ciphers=NULL;
+			
+			/* check if some cipher was preferred by call back */
+			pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
+			if (pref_cipher == NULL)
+				{
+				al=SSL_AD_HANDSHAKE_FAILURE;
+				SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
+				goto f_err;
+				}
+
+			s->session->cipher=pref_cipher;
+
+			if (s->cipher_list)
+				sk_SSL_CIPHER_free(s->cipher_list);
+
+			if (s->cipher_list_by_id)
+				sk_SSL_CIPHER_free(s->cipher_list_by_id);
+
+			s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
+			s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
+		}
+	}
+
 	/* Given s->session->ciphers and SSL_get_ciphers, we must
 	 * pick a cipher */
 
diff -uprN openssl-0.9.8d.orig/ssl/ssl.h openssl-0.9.8d/ssl/ssl.h
--- openssl-0.9.8d.orig/ssl/ssl.h	2006-06-14 06:52:49.000000000 -0700
+++ openssl-0.9.8d/ssl/ssl.h	2006-12-10 08:20:02.000000000 -0800
@@ -345,6 +345,7 @@ extern "C" {
  * 'struct ssl_st *' function parameters used to prototype callbacks
  * in SSL_CTX. */
 typedef struct ssl_st *ssl_crock_st;
+typedef struct tls_extension_st TLS_EXTENSION;
 
 /* used to hold info on the particular ciphers used */
 typedef struct ssl_cipher_st
@@ -366,6 +367,8 @@ DECLARE_STACK_OF(SSL_CIPHER)
 typedef struct ssl_st SSL;
 typedef struct ssl_ctx_st SSL_CTX;
 
+typedef int (*tls_session_secret_cb_fn)(SSL *s, void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg);
+
 /* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
 typedef struct ssl_method_st
 	{
@@ -973,6 +976,15 @@ struct ssl_st
 	int first_packet;
 	int client_version;	/* what was passed, used for
 				 * SSLv3/TLS rollback check */
+
+	/* TLS externsions */
+	TLS_EXTENSION *tls_extension;
+	int (*tls_extension_cb)(SSL *s, TLS_EXTENSION *tls_ext, void *arg);
+	void *tls_extension_cb_arg;
+
+	/* TLS pre-shared secret session resumption */
+	tls_session_secret_cb_fn tls_session_secret_cb;
+	void *tls_session_secret_cb_arg;
 	};
 
 #ifdef __cplusplus
@@ -1538,6 +1550,13 @@ void *SSL_COMP_get_compression_methods(v
 int SSL_COMP_add_compression_method(int id,void *cm);
 #endif
 
+/* TLS extensions functions */
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len);
+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg);
+
+/* Pre-shared secret session resumption functions */
+int SSL_set_session_secret_cb(SSL *s, tls_session_secret_cb_fn tls_session_secret_cb, void *arg);
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
@@ -1719,6 +1738,7 @@ void ERR_load_SSL_strings(void);
 #define SSL_F_TLS1_ENC					 210
 #define SSL_F_TLS1_SETUP_KEY_BLOCK			 211
 #define SSL_F_WRITE_PENDING				 212
+#define SSL_F_SSL_SET_HELLO_EXTENSION	 213
 
 /* Reason codes. */
 #define SSL_R_APP_DATA_IN_HANDSHAKE			 100
diff -uprN openssl-0.9.8d.orig/ssl/ssl_err.c openssl-0.9.8d/ssl/ssl_err.c
--- openssl-0.9.8d.orig/ssl/ssl_err.c	2006-01-08 13:52:46.000000000 -0800
+++ openssl-0.9.8d/ssl/ssl_err.c	2006-12-10 08:20:02.000000000 -0800
@@ -242,6 +242,7 @@ static ERR_STRING_DATA SSL_str_functs[]=
 {ERR_FUNC(SSL_F_TLS1_ENC),	"TLS1_ENC"},
 {ERR_FUNC(SSL_F_TLS1_SETUP_KEY_BLOCK),	"TLS1_SETUP_KEY_BLOCK"},
 {ERR_FUNC(SSL_F_WRITE_PENDING),	"WRITE_PENDING"},
+{ERR_FUNC(SSL_F_SSL_SET_HELLO_EXTENSION), "SSL_set_hello_extension"},
 {0,NULL}
 	};
 
diff -uprN openssl-0.9.8d.orig/ssl/ssl_sess.c openssl-0.9.8d/ssl/ssl_sess.c
--- openssl-0.9.8d.orig/ssl/ssl_sess.c	2005-12-30 15:51:57.000000000 -0800
+++ openssl-0.9.8d/ssl/ssl_sess.c	2006-12-10 08:20:02.000000000 -0800
@@ -656,6 +656,15 @@ long SSL_CTX_get_timeout(const SSL_CTX *
 	return(s->session_timeout);
 	}
 
+int SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, void *secret, int *secret_len, 
+	STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg), void *arg)
+{
+	if (s == NULL) return(0);
+	s->tls_session_secret_cb = tls_session_secret_cb;
+	s->tls_session_secret_cb_arg = arg;
+	return(1);
+}
+
 typedef struct timeout_param_st
 	{
 	SSL_CTX *ctx;
diff -uprN openssl-0.9.8d.orig/ssl/t1_ext.c openssl-0.9.8d/ssl/t1_ext.c
--- openssl-0.9.8d.orig/ssl/t1_ext.c	1969-12-31 16:00:00.000000000 -0800
+++ openssl-0.9.8d/ssl/t1_ext.c	2006-12-10 08:20:02.000000000 -0800
@@ -0,0 +1,48 @@
+
+#include <stdio.h>
+#include "ssl_locl.h"
+
+
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len)
+{
+	if(s->version >= TLS1_VERSION)
+	{
+		if(s->tls_extension)
+		{
+			OPENSSL_free(s->tls_extension);
+			s->tls_extension = NULL;
+		}
+
+		if(ext_data)
+		{
+			s->tls_extension = OPENSSL_malloc(sizeof(TLS_EXTENSION) + ext_len);
+			if(!s->tls_extension)
+			{
+				SSLerr(SSL_F_SSL_SET_HELLO_EXTENSION, ERR_R_MALLOC_FAILURE);
+				return 0;
+			}
+
+			s->tls_extension->type = ext_type;
+			s->tls_extension->length = ext_len;
+			s->tls_extension->data = s->tls_extension + 1;
+			memcpy(s->tls_extension->data, ext_data, ext_len);
+		}
+
+		return 1;
+	}
+
+	return 0;
+}
+
+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg)
+{
+	if(s->version >= TLS1_VERSION)
+	{
+		s->tls_extension_cb = cb;
+		s->tls_extension_cb_arg = arg;
+
+		return 1;
+	}
+
+	return 0;
+}
diff -uprN openssl-0.9.8d.orig/ssl/t1_lib.c openssl-0.9.8d/ssl/t1_lib.c
--- openssl-0.9.8d.orig/ssl/t1_lib.c	2005-08-05 16:52:07.000000000 -0700
+++ openssl-0.9.8d/ssl/t1_lib.c	2006-12-10 08:20:02.000000000 -0800
@@ -97,6 +97,10 @@ int tls1_new(SSL *s)
 
 void tls1_free(SSL *s)
 	{
+	if(s->tls_extension)
+	{
+		OPENSSL_free(s->tls_extension);
+	}
 	ssl3_free(s);
 	}
 
diff -uprN openssl-0.9.8d.orig/ssl/tls1.h openssl-0.9.8d/ssl/tls1.h
--- openssl-0.9.8d.orig/ssl/tls1.h	2006-06-14 10:52:01.000000000 -0700
+++ openssl-0.9.8d/ssl/tls1.h	2006-12-10 08:20:02.000000000 -0800
@@ -296,6 +296,14 @@ extern "C" {
 #define TLS_MD_MASTER_SECRET_CONST    "\x6d\x61\x73\x74\x65\x72\x20\x73\x65\x63\x72\x65\x74"  /*master secret*/
 #endif
 
+/* TLS extension struct */
+struct tls_extension_st
+{
+	unsigned short type;
+	unsigned short length;
+	void *data;
+};
+
 #ifdef  __cplusplus
 }
 #endif
diff -uprN openssl-0.9.8d.orig/util/ssleay.num openssl-0.9.8d/util/ssleay.num
--- openssl-0.9.8d.orig/util/ssleay.num	2005-05-08 17:22:02.000000000 -0700
+++ openssl-0.9.8d/util/ssleay.num	2006-12-10 08:20:02.000000000 -0800
@@ -226,3 +226,6 @@ DTLSv1_server_method                    
 SSL_COMP_get_compression_methods        276	EXIST:!VMS:FUNCTION:COMP
 SSL_COMP_get_compress_methods           276	EXIST:VMS:FUNCTION:COMP
 SSL_SESSION_get_id                      277	EXIST::FUNCTION:
+SSL_set_hello_extension			278	EXIST::FUNCTION:
+SSL_set_hello_extension_cb		279	EXIST::FUNCTION:
+SSL_set_session_secret_cb		280	EXIST::FUNCTION: