1 files changed, 116 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hcrypto/pkcs5.c b/source4/heimdal/lib/hcrypto/pkcs5.c
new file mode 100644
index 0000000000..85b8713cba
--- /dev/null
+++ b/source4/heimdal/lib/hcrypto/pkcs5.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2006 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+RCSID("$Id: pkcs5.c 17445 2006-05-05 10:37:46Z lha $");
+
+#ifdef KRB5
+#include <krb5-types.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <evp.h>
+#include <hmac.h>
+
+#include <roken.h>
+
+int
+PKCS5_PBKDF2_HMAC_SHA1(const void * password, size_t password_len,
+		       const void * salt, size_t salt_len,
+		       unsigned long iter,
+		       size_t keylen, void *key)
+{
+    size_t datalen, leftofkey, checksumsize;
+    char *data, *tmpcksum;
+    uint32_t keypart;
+    const EVP_MD *md;
+    unsigned long i;
+    int j;
+    char *p;
+    unsigned int hmacsize;
+    
+    md = EVP_sha1();
+    checksumsize = EVP_MD_size(md);
+    datalen = salt_len + 4;
+
+    tmpcksum = malloc(checksumsize + datalen);
+    if (tmpcksum == NULL)
+	return 0;
+
+    data = &tmpcksum[checksumsize];
+
+    memcpy(data, salt, salt_len);
+
+    keypart = 1;
+    leftofkey = keylen;
+    p = key;
+
+    while (leftofkey) {
+	int len;
+
+	if (leftofkey > checksumsize)
+	    len = checksumsize;
+	else
+	    len = leftofkey;
+
+	data[datalen - 4] = (keypart >> 24) & 0xff;
+	data[datalen - 3] = (keypart >> 16) & 0xff;
+	data[datalen - 2] = (keypart >> 8)  & 0xff;
+	data[datalen - 1] = (keypart)       & 0xff;
+
+	HMAC(md, password, password_len, data, datalen, 
+	     tmpcksum, &hmacsize);
+
+	memcpy(p, tmpcksum, len);
+	for (i = 1; i < iter; i++) {
+	    HMAC(md, password, password_len, tmpcksum, checksumsize,
+		 tmpcksum, &hmacsize);
+
+	    for (j = 0; j < len; j++)
+		p[j] ^= tmpcksum[j];
+	}
+
+	p += len;
+	leftofkey -= len;
+	keypart++;
+    }
+
+    free(tmpcksum);
+
+    return 1;
+}