1 files changed, 54 insertions, 0 deletions
diff --git a/src/lib/crypto/builtin/des/des_prf.c b/src/lib/crypto/builtin/des/des_prf.c
new file mode 100644
index 0000000..a86ba90
--- /dev/null
+++ b/src/lib/crypto/builtin/des/des_prf.c
@@ -0,0 +1,54 @@
+/*
+ * lib/crypto/des/des_prf.c
+ *
+ * Copyright (C) 2004, 2009  by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ * 
+ *
+ * This file contains an implementation of the RFC 3961 PRF for
+ * des-cbc-crc, des-cbc-md4, and des-cbc-md5 enctypes.
+ */
+
+#include "k5-int.h"
+#include "hash_provider/hash_provider.h"		/* XXX is this ok? */
+
+krb5_error_code
+krb5int_des_prf (const struct krb5_enc_provider *enc,
+		const struct krb5_hash_provider *hash,
+		const krb5_keyblock *key,
+		const krb5_data *in, krb5_data *out)
+{
+  krb5_data tmp;
+  krb5_error_code ret = 0;
+
+  hash = &krb5int_hash_md5;		/* MD5 is always used. */
+  tmp.length = hash->hashsize;
+  tmp.data = malloc(hash->hashsize);
+  if (tmp.data == NULL)
+    return ENOMEM;
+  ret = hash->hash(1, in, &tmp);
+  if (ret == 0)
+      ret = enc->encrypt(key, NULL, &tmp, out);
+  free(tmp.data);
+  return ret;
+}