- Added PKCS#5 PBKDF2 key derivation function
diff --git a/include/polarssl/pbkdf2.h b/include/polarssl/pbkdf2.h
new file mode 100644
index 0000000..5a23150
--- /dev/null
+++ b/include/polarssl/pbkdf2.h
@@ -0,0 +1,73 @@
+/**
+ * \file pbkdf2.h
+ *
+ * \brief Password-Based Key Derivation Function 2 (from PKCS#5)
+ *
+ * \author Mathias Olsson <mathias@kompetensum.com>
+ *
+ * Copyright (C) 2006-2012, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_PBKDF2_H
+#define POLARSSL_PBKDF2_H
+
+#include <string.h>
+
+#include "md.h"
+
+#define POLARSSL_ERR_PBKDF2_BAD_INPUT_DATA -0x007C /**< Bad input parameters to function. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief PKCS#5 PBKDF2 using HMAC
+ *
+ * \param ctx Generic HMAC context
+ * \param password Password to use when generating key
+ * \param plen Length of password
+ * \param salt Salt to use when generating key
+ * \param slen Length of salt
+ * \param iteration_count Iteration count
+ * \param key_length Length of generated key
+ * \param output Generated key. Must be at least as big as key_length
+ *
+ * \returns 0 on success, or a PolarSSL error code if verification fails.
+ */
+int pbkdf2_hmac( md_context_t *ctx, const unsigned char *password,
+ size_t plen, const unsigned char *salt, size_t slen,
+ unsigned int iteration_count,
+ unsigned long key_length, unsigned char *output );
+
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int pbkdf2_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* pbkdf2.h */