[PATCH 21/24] wolfssl: Implement EAP-FAST

[Juliusz Sosinowicz]

Add tls_session_ticket_ext_cb and use the new wolfSSL_set_session_ticket_ext_cb API.

Signed-off-by: Juliusz Sosinowicz <juliusz at wolfssl.com>
---
 src/crypto/tls_wolfssl.c | 59 +++++++++++++++++++++++++++++++---------
 1 file changed, 46 insertions(+), 13 deletions(-)

diff --git a/src/crypto/tls_wolfssl.c b/src/crypto/tls_wolfssl.c
index b6869b7488..22f8d6eb78 100644
--- a/src/crypto/tls_wolfssl.c
+++ b/src/crypto/tls_wolfssl.c
@@ -94,7 +94,8 @@ struct tls_connection {
 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
 	tls_session_ticket_cb session_ticket_cb;
 	void *session_ticket_cb_ctx;
-	byte session_ticket[SESSION_TICKET_LEN];
+	u8 *session_ticket;
+	size_t session_ticket_len;
 #endif
 	unsigned int ca_cert_verify:1;
 	unsigned int cert_probe:1;
@@ -513,6 +514,7 @@ void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn)
 	os_free(conn->domain_match);
 	os_free(conn->peer_subject);
 	os_free(conn->check_cert_subject);
+	os_free(conn->session_ticket);
 
 	/* self */
 	os_free(conn);
@@ -2481,32 +2483,58 @@ static int tls_sess_sec_cb(WOLFSSL *s, void *secret, int *secret_len, void *arg)
 	int ret;
 	unsigned char client_random[RAN_LEN];
 	unsigned char server_random[RAN_LEN];
-	word32 ticket_len = sizeof(conn->session_ticket);
 
 	if (!conn || !conn->session_ticket_cb)
-		return 1;
+		return -1;
+
+	wpa_printf(MSG_DEBUG, "wolfSSL: %s", __func__);
 
 	if (wolfSSL_get_client_random(s, client_random,
 				      sizeof(client_random)) == 0 ||
 	    wolfSSL_get_server_random(s, server_random,
-				      sizeof(server_random)) == 0 ||
-	    wolfSSL_get_SessionTicket(s, conn->session_ticket,
-				      &ticket_len) != 1)
-		return 1;
-
-	if (ticket_len == 0)
-		return 0;
+				      sizeof(server_random)) == 0)
+		return -1;
 
 	ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
-				      conn->session_ticket, ticket_len,
+				      conn->session_ticket, conn->session_ticket_len,
 				      client_random, server_random, secret);
+
+	wpa_printf(MSG_DEBUG, "wolfSSL: %s conn->session_ticket_cb: %d", __func__, ret);
+
+	os_free(conn->session_ticket);
+	conn->session_ticket = NULL;
+
 	if (ret <= 0)
-		return 1;
+		return -1;
 
 	*secret_len = SECRET_LEN;
 	return 0;
 }
 
+static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
+				     int len, void *arg)
+{
+	struct tls_connection *conn = arg;
+
+	if (conn == NULL || conn->session_ticket_cb == NULL)
+		return 0;
+
+	wpa_printf(MSG_DEBUG, "wolfSSL: %s: length=%d", __func__, len);
+
+	os_free(conn->session_ticket);
+	conn->session_ticket = NULL;
+
+	wpa_hexdump(MSG_DEBUG, "wolfSSL: ClientHello SessionTicket "
+		    "extension", data, len);
+
+	conn->session_ticket = os_memdup(data, len);
+	if (conn->session_ticket == NULL)
+		return 0;
+
+	conn->session_ticket_len = len;
+
+	return 1;
+}
 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
 
 
@@ -2521,11 +2549,16 @@ int tls_connection_set_session_ticket_cb(void *tls_ctx,
 
 	if (cb) {
 		if (wolfSSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
-						  conn) != 1)
+				conn) != 1)
+			return -1;
+		if (wolfSSL_set_session_ticket_ext_cb(conn->ssl,
+				tls_session_ticket_ext_cb, conn) != 1)
 			return -1;
 	} else {
 		if (wolfSSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
 			return -1;
+		if (wolfSSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL) != 1)
+			return -1;
 	}
 
 	return 0;
-- 
2.34.1