1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/bearssl/src/ssl_hashes.c b/third_party/bearssl/src/ssl_hashes.c
new file mode 100644
index 0000000..e10a980
--- /dev/null
+++ b/third_party/bearssl/src/ssl_hashes.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <[email protected]>
+ *
+ * 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 inner.h */
+int
+br_ssl_choose_hash(unsigned bf)
+{
+	static const unsigned char pref[] = {
+		br_sha256_ID, br_sha384_ID, br_sha512_ID,
+		br_sha224_ID, br_sha1_ID
+	};
+	size_t u;
+
+	for (u = 0; u < sizeof pref; u ++) {
+		int x;
+
+		x = pref[u];
+		if ((bf >> x) & 1) {
+			return x;
+		}
+	}
+	return 0;
+}