Implement the Opaque PRF Input TLS extension
(draft-rescorla-tls-opaque-prf-input-00.txt), and do some cleanups and
bugfixes on the way. In particular, this fixes the buffer bounds
checks in ssl_add_clienthello_tlsext() and in ssl_add_serverhello_tlsext().
Note that the opaque PRF Input TLS extension is not compiled by default;
see CHANGES.
diff --git a/ssl/tls1.h b/ssl/tls1.h
index f55ab3d..cac8d0e 100644
--- a/ssl/tls1.h
+++ b/ssl/tls1.h
@@ -183,16 +183,23 @@
#define TLS1_AD_BAD_CERTIFICATE_HASH_VALUE 114
#define TLS1_AD_UNKNOWN_PSK_IDENTITY 115 /* fatal */
-/* ExtensionType values from RFC 3546 */
+/* ExtensionType values from RFC3546 / RFC4366 */
#define TLSEXT_TYPE_server_name 0
#define TLSEXT_TYPE_max_fragment_length 1
#define TLSEXT_TYPE_client_certificate_url 2
#define TLSEXT_TYPE_trusted_ca_keys 3
#define TLSEXT_TYPE_truncated_hmac 4
#define TLSEXT_TYPE_status_request 5
+/* ExtensionType values from RFC4492 */
#define TLSEXT_TYPE_elliptic_curves 10
#define TLSEXT_TYPE_ec_point_formats 11
#define TLSEXT_TYPE_session_ticket 35
+/* ExtensionType value from draft-rescorla-tls-opaque-prf-input-00.txt */
+#if 0 /* will have to be provided externally for now ,
+ * i.e. build with -DTLSEXT_TYPE_opaque_prf_input=38183
+ * using whatever extension number you'd like to try */
+# define TLSEXT_TYPE_opaque_prf_input ?? */
+#endif
/* NameType value from RFC 3546 */
#define TLSEXT_NAMETYPE_host_name 0
@@ -235,6 +242,14 @@
SSL_CTX_ctrl((ctx),SSL_CTRL_GET_TLXEXT_TICKET_KEYS,(keylen),(keys))
#define SSL_CTX_set_tlsext_ticket_keys(ctx, keys, keylen) \
SSL_CTX_ctrl((ctx),SSL_CTRL_SET_TLXEXT_TICKET_KEYS,(keylen),(keys))
+
+#define SSL_set_tlsext_opaque_prf_input(s, src, len) \
+SSL_ctrl(s,SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT, len, src)
+#define SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb) \
+SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB, (void (*)(void))cb)
+#define SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg) \
+SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB_ARG, 0, arg)
+
#endif
/* PSK ciphersuites from 4279 */
@@ -416,10 +431,6 @@
#define TLS1_TXT_DHE_RSA_WITH_SEED_SHA "DHE-RSA-SEED-SHA"
#define TLS1_TXT_ADH_WITH_SEED_SHA "ADH-SEED-SHA"
-/* Flags for SSL_CIPHER.algorithm2 field */
-/* Stream MAC for GOST ciphersuites from cryptopro draft */
-#define TLS1_STREAM_MAC 0x04
-
#define TLS_CT_RSA_SIGN 1
#define TLS_CT_DSS_SIGN 2
