patches.chromium/0009-stricter_cutthrough.patch

diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index e47eef1..d1b3224 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -557,7 +557,8 @@ int ssl3_connect(SSL *s)
 				}
 			else
 				{
-				if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128
+				if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH)
+				    && ssl3_can_cutthrough(s)
 				    && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */
 				   )
 					{
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index 45a76ae..d75b9f7 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -3305,12 +3305,39 @@ int SSL_cutthrough_complete(const SSL *s)
 		s->version >= SSL3_VERSION &&
 		s->s3->in_read_app_data == 0 &&   /* cutthrough only applies to write() */
 		(SSL_get_mode((SSL*)s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) &&  /* cutthrough enabled */
-		SSL_get_cipher_bits(s, NULL) >= 128 &&                      /* strong cipher choosen */
+		ssl3_can_cutthrough(s) &&                                   /* cutthrough allowed */
 		s->s3->previous_server_finished_len == 0 &&                 /* not a renegotiation handshake */
 		(s->state == SSL3_ST_CR_SESSION_TICKET_A ||                 /* ready to write app-data*/
 			s->state == SSL3_ST_CR_FINISHED_A));
 	}
 
+int ssl3_can_cutthrough(const SSL *s)
+	{
+	const SSL_CIPHER *c;
+
+	/* require a strong enough cipher */
+	if (SSL_get_cipher_bits(s, NULL) < 128)
+		return 0;
+
+	/* require NPN extension */
+#ifndef OPENSSL_NO_NEXTPROTONEG
+	if (!s->s3->next_proto_neg_seen)
+		return 0;
+#else
+	return 0;
+#endif
+
+	/* require a forward-secret cipher */
+	c = SSL_get_current_cipher(s);
+	if (!c || (c->algorithm_mkey != SSL_kEDH &&
+			c->algorithm_mkey != SSL_kEECDH))
+		{
+		return 0;
+		}
+
+	return 1;
+	}
+
 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
  * any. If EVP_MD pointer is passed, initializes ctx with this md
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index 2f8cda8..3732825 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -1160,6 +1160,8 @@ const EVP_MD *tls12_get_hash(unsigned char hash_alg);
 int tls1_channel_id_hash(EVP_MD_CTX *ctx, SSL *s);
 #endif
 
+int ssl3_can_cutthrough(const SSL *s);
+
 EVP_MD_CTX* ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) ;
 void ssl_clear_hash_ctx(EVP_MD_CTX **hash);
 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,