1 files changed, 93 insertions, 0 deletions
diff --git a/grub-core/lib/libgcrypt/cipher/hash-common.c b/grub-core/lib/libgcrypt/cipher/hash-common.c
new file mode 100644
index 0000000..8c413bc
--- /dev/null
+++ b/grub-core/lib/libgcrypt/cipher/hash-common.c
@@ -0,0 +1,93 @@
+/* hash-common.c - Common code for hash algorithms
+ * Copyright (C) 2008 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+#include "g10lib.h"
+#include "hash-common.h"
+
+
+/* Run a selftest for hash algorithm ALGO.  If the resulting digest
+   matches EXPECT/EXPECTLEN and everything else is fine as well,
+   return NULL.  If an error occurs, return a static text string
+   describing the error.
+
+   DATAMODE controls what will be hashed according to this table:
+
+     0 - Hash the supplied DATA of DATALEN.
+     1 - Hash one million times a 'a'.  DATA and DATALEN are ignored.
+
+*/
+const char *
+_gcry_hash_selftest_check_one (int algo,
+                               int datamode, const void *data, size_t datalen,
+                               const void *expect, size_t expectlen)
+{
+  const char *result = NULL;
+  gcry_error_t err = 0;
+  gcry_md_hd_t hd;
+  unsigned char *digest;
+
+  if (_gcry_md_get_algo_dlen (algo) != expectlen)
+    return "digest size does not match expected size";
+
+  err = _gcry_md_open (&hd, algo, 0);
+  if (err)
+    return "gcry_md_open failed";
+
+  switch (datamode)
+    {
+    case 0:
+      _gcry_md_write (hd, data, datalen);
+      break;
+
+    case 1: /* Hash one million times an "a". */
+      {
+        char aaa[1000];
+        int i;
+
+        /* Write in odd size chunks so that we test the buffering.  */
+        memset (aaa, 'a', 1000);
+        for (i = 0; i < 1000; i++)
+          _gcry_md_write (hd, aaa, 1000);
+      }
+      break;
+
+    default:
+      result = "invalid DATAMODE";
+    }
+
+  if (!result)
+    {
+      digest = _gcry_md_read (hd, algo);
+
+      if ( memcmp (digest, expect, expectlen) )
+        result = "digest mismatch";
+    }
+
+  _gcry_md_close (hd);
+
+  return result;
+}