Moved TLS stack to its own library

src/libtls/tls_prf.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup tls_prf tls_prf
+ * @{ @ingroup libtls
+ */
+
+#ifndef TLS_PRF_H_
+#define TLS_PRF_H_
+
+typedef struct tls_prf_t tls_prf_t;
+
+#include <crypto/prfs/prf.h>
+
+/**
+ * The PRF function specified on TLS, based on HMAC.
+ */
+struct tls_prf_t {
+
+	/**
+	 * Set the key of the PRF function.
+	 *
+	 * @param key		key to set
+	 */
+	void (*set_key)(tls_prf_t *this, chunk_t key);
+
+	/**
+	 * Generate a series of bytes using a label and a seed.
+	 *
+	 * @param label		ASCII input label
+	 * @param seed		seed input value
+	 * @param bytes		number of bytes to get
+	 * @param out		buffer receiving bytes
+	 */
+	void (*get_bytes)(tls_prf_t *this, char *label, chunk_t seed,
+					  size_t bytes, char *out);
+
+	/**
+	 * Destroy a tls_prf_t.
+	 */
+	void (*destroy)(tls_prf_t *this);
+};
+
+/**
+ * Create a tls_prf instance with specific algorithm as in TLS 1.2.
+ *
+ * @param hash			underlying PRF function to use
+ * @return				TLS PRF algorithm
+ */
+tls_prf_t *tls_prf_create_12(pseudo_random_function_t prf);
+
+/**
+ * Create a tls_prf instance with XOred SHA1/MD5 as in TLS 1.0/1.1.
+ *
+ * @return				TLS PRF algorithm
+ */
+tls_prf_t *tls_prf_create_10();
+
+#endif /** TLS_PRF_H_ @}*/