Initial import.

src/ssl/ssl_client.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "inner.h"
+
+/* see bearssl_ssl.h */
+void
+br_ssl_client_zero(br_ssl_client_context *cc)
+{
+	/*
+	 * For really standard C, we should explicitly set to NULL all
+	 * pointers, and 0 all other fields. However, on all our target
+	 * architectures, a direct memset() will work, be faster, and
+	 * use a lot less code.
+	 */
+	memset(cc, 0, sizeof *cc);
+}
+
+/* see bearssl_ssl.h */
+int
+br_ssl_client_reset(br_ssl_client_context *cc,
+	const char *server_name, int resume_session)
+{
+	size_t n;
+
+	br_ssl_engine_set_buffer(&cc->eng, NULL, 0, 0);
+	cc->eng.version_out = cc->eng.version_min;
+	if (!resume_session) {
+		br_ssl_client_forget_session(cc);
+	}
+	if (!br_ssl_engine_init_rand(&cc->eng)) {
+		return 0;
+	}
+
+	/*
+	 * We always set back the "reneg" flag to 0 because we use it
+	 * to distinguish between first handshake and renegotiation.
+	 * Note that "renegotiation" and "session resumption" are two
+	 * different things.
+	 */
+	cc->eng.reneg = 0;
+
+	if (server_name == NULL) {
+		cc->eng.server_name[0] = 0;
+	} else {
+		n = strlen(server_name) + 1;
+		if (n > sizeof cc->eng.server_name) {
+			br_ssl_engine_fail(&cc->eng, BR_ERR_BAD_PARAM);
+			return 0;
+		}
+		memcpy(cc->eng.server_name, server_name, n);
+	}
+
+	br_ssl_engine_hs_reset(&cc->eng,
+		br_ssl_hs_client_init_main, br_ssl_hs_client_run);
+	return br_ssl_engine_last_error(&cc->eng) == BR_ERR_OK;
+}