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Diffstat (limited to 'src/lib/libssl/t1_lib.c')
-rw-r--r--src/lib/libssl/t1_lib.c86
1 files changed, 1 insertions, 85 deletions
diff --git a/src/lib/libssl/t1_lib.c b/src/lib/libssl/t1_lib.c
index e901a901da..b0f0de3bd8 100644
--- a/src/lib/libssl/t1_lib.c
+++ b/src/lib/libssl/t1_lib.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: t1_lib.c,v 1.78 2015/06/19 01:38:54 doug Exp $ */ 1/* $OpenBSD: t1_lib.c,v 1.79 2015/07/17 15:50:37 doug Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved. 3 * All rights reserved.
4 * 4 *
@@ -1204,87 +1204,6 @@ parse_error:
1204 return (0); 1204 return (0);
1205} 1205}
1206 1206
1207/* ssl_check_for_safari attempts to fingerprint Safari using OS X
1208 * SecureTransport using the TLS extension block in |d|, of length |n|.
1209 * Safari, since 10.6, sends exactly these extensions, in this order:
1210 * SNI,
1211 * elliptic_curves
1212 * ec_point_formats
1213 *
1214 * We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8,
1215 * but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them.
1216 * Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from
1217 * 10.8..10.8.3 (which don't work).
1218 */
1219static void
1220ssl_check_for_safari(SSL *s, const unsigned char *data, const unsigned char *d,
1221 int n)
1222{
1223 unsigned short type, size;
1224 static const unsigned char kSafariExtensionsBlock[] = {
1225 0x00, 0x0a, /* elliptic_curves extension */
1226 0x00, 0x08, /* 8 bytes */
1227 0x00, 0x06, /* 6 bytes of curve ids */
1228 0x00, 0x17, /* P-256 */
1229 0x00, 0x18, /* P-384 */
1230 0x00, 0x19, /* P-521 */
1231
1232 0x00, 0x0b, /* ec_point_formats */
1233 0x00, 0x02, /* 2 bytes */
1234 0x01, /* 1 point format */
1235 0x00, /* uncompressed */
1236 };
1237
1238 /* The following is only present in TLS 1.2 */
1239 static const unsigned char kSafariTLS12ExtensionsBlock[] = {
1240 0x00, 0x0d, /* signature_algorithms */
1241 0x00, 0x0c, /* 12 bytes */
1242 0x00, 0x0a, /* 10 bytes */
1243 0x05, 0x01, /* SHA-384/RSA */
1244 0x04, 0x01, /* SHA-256/RSA */
1245 0x02, 0x01, /* SHA-1/RSA */
1246 0x04, 0x03, /* SHA-256/ECDSA */
1247 0x02, 0x03, /* SHA-1/ECDSA */
1248 };
1249
1250 if (data >= (d + n - 2))
1251 return;
1252 data += 2;
1253
1254 if (data > (d + n - 4))
1255 return;
1256 n2s(data, type);
1257 n2s(data, size);
1258
1259 if (type != TLSEXT_TYPE_server_name)
1260 return;
1261
1262 if (data + size > d + n)
1263 return;
1264 data += size;
1265
1266 if (TLS1_get_client_version(s) >= TLS1_2_VERSION) {
1267 const size_t len1 = sizeof(kSafariExtensionsBlock);
1268 const size_t len2 = sizeof(kSafariTLS12ExtensionsBlock);
1269
1270 if (data + len1 + len2 != d + n)
1271 return;
1272 if (memcmp(data, kSafariExtensionsBlock, len1) != 0)
1273 return;
1274 if (memcmp(data + len1, kSafariTLS12ExtensionsBlock, len2) != 0)
1275 return;
1276 } else {
1277 const size_t len = sizeof(kSafariExtensionsBlock);
1278
1279 if (data + len != d + n)
1280 return;
1281 if (memcmp(data, kSafariExtensionsBlock, len) != 0)
1282 return;
1283 }
1284
1285 s->s3->is_probably_safari = 1;
1286}
1287
1288int 1207int
1289ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, 1208ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d,
1290 int n, int *al) 1209 int n, int *al)
@@ -1302,9 +1221,6 @@ ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d,
1302 free(s->s3->alpn_selected); 1221 free(s->s3->alpn_selected);
1303 s->s3->alpn_selected = NULL; 1222 s->s3->alpn_selected = NULL;
1304 1223
1305 if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
1306 ssl_check_for_safari(s, data, d, n);
1307
1308 if (data >= (d + n - 2)) 1224 if (data >= (d + n - 2))
1309 goto ri_check; 1225 goto ri_check;
1310 n2s(data, len); 1226 n2s(data, len);