Diff: pwdbased.c

Revision:

0:5045d2638c29

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pwdbased.c	Sat Feb 05 01:09:17 2011 +0000
@@ -0,0 +1,76 @@
+/* pwdbased.c
+ *
+ * Copyright (C) 2006-2010 Sawtooth Consulting Ltd.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL 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.
+ *
+ * CyaSSL 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+#ifndef NO_PWDBASED
+
+#include "pwdbased.h"
+
+
+int PBKDF1(byte* output, const byte* passwd, int pLen, const byte* salt,
+           int sLen, int iterations, int kLen, int hashType)
+{
+    Md5  md5;
+    Sha  sha;
+    int  hLen = (hashType == MD5) ? MD5_DIGEST_SIZE : SHA_DIGEST_SIZE;
+    int  i;
+    byte buffer[SHA_DIGEST_SIZE];  /* max size */
+
+    if (hashType != MD5 && hashType != SHA)
+        return -1;
+
+    if (kLen > hLen)
+        return -1;
+
+    if (iterations < 1)
+        return -1;
+
+    if (hashType == MD5) {
+        InitMd5(&md5);
+        Md5Update(&md5, passwd, pLen);
+        Md5Update(&md5, salt,   sLen);
+        Md5Final(&md5,  buffer);
+    }
+    else {
+        InitSha(&sha);
+        ShaUpdate(&sha, passwd, pLen);
+        ShaUpdate(&sha, salt,   sLen);
+        ShaFinal(&sha,  buffer);
+    }
+
+    for (i = 1; i < iterations; i++) {
+        if (hashType == MD5) {
+            Md5Update(&md5, buffer, hLen);
+            Md5Final(&md5,  buffer);
+        }
+        else {
+            ShaUpdate(&sha, buffer, hLen);
+            ShaFinal(&sha,  buffer);
+        }
+    }
+    XMEMCPY(output, buffer, kLen);
+
+    return 0;
+}
+
+
+#endif /* NO_PWDBASED */
+