- Added PKCS#5 PBKDF2 key derivation function

include/polarssl/config.h

@@ -582,6 +582,19 @@
  */
 #define POLARSSL_PADLOCK_C
 
+/**
+ * \def POLARSSL_PBKDF2_C
+ *
+ * Enable PKCS#5 PBKDF2 key derivation function
+ *
+ * Module:  library/pbkdf2.c
+ *
+ * Requires: POLARSSL_MD_C
+ *
+ * This module adds support for the PKCS#5 PBKDF2 key derivation function.
+#define POLARSSL_PBKDF2_C
+ */
+
 /**
  * \def POLARSSL_PEM_C
  *

include/polarssl/error.h

@@ -67,6 +67,7 @@
  * SHA1      1  0x0076-0x0076
  * SHA2      1  0x0078-0x0078
  * SHA4      1  0x007A-0x007A
+ * PBKDF2    1  0x007C-0x007C
  *
  * High-level module nr (3 bits - 0x1...-0x8...)
  * Name     ID  Nr of Errors

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 */