1 files changed, 65 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/keyhash_provider/md5_hmac.c b/src/lib/crypto/krb/keyhash_provider/md5_hmac.c
new file mode 100644
index 0000000..d05b97f
--- /dev/null
+++ b/src/lib/crypto/krb/keyhash_provider/md5_hmac.c
@@ -0,0 +1,65 @@
+/*
+ * lib/crypto/keyhash_provider/md5_hmac.c
+ *
+ * Copyright 2001, 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.
+ * 
+ * Implementation of Microsoft KERB_CHECKSUM_MD5_HMAC
+ */
+
+#include "k5-int.h"
+#include "keyhash_provider.h"
+#include "arcfour-int.h"
+#include "rsa-md5.h"
+#include "hash_provider.h"
+
+static  krb5_error_code
+k5_md5_hmac_hash (const krb5_keyblock *key, krb5_keyusage usage,
+		  const krb5_data *iv,
+		  const krb5_data *input, krb5_data *output)
+{
+  krb5_keyusage ms_usage;
+  krb5_MD5_CTX ctx;
+  unsigned char t[4];
+  krb5_data ds;
+
+  krb5_MD5Init(&ctx);
+
+  ms_usage = krb5int_arcfour_translate_usage (usage);
+  store_32_le(ms_usage, t);
+  krb5_MD5Update(&ctx, t, sizeof(t));
+  krb5_MD5Update(&ctx, (unsigned char *)input->data, input->length);
+  krb5_MD5Final(&ctx);
+
+  ds.magic = KV5M_DATA;
+  ds.length = 16;
+  ds.data = (char *)ctx.digest;
+
+  return krb5_hmac ( &krb5int_hash_md5, key, 1, &ds, output);
+}
+
+const struct krb5_keyhash_provider krb5int_keyhash_md5_hmac = {
+  16,
+  k5_md5_hmac_hash,
+  NULL /*checksum  again*/
+};
+