1 files changed, 112 insertions, 0 deletions
diff --git a/src/util/test_rsa.c b/src/util/test_rsa.c
new file mode 100644
index 000000000..ac3ae2cd4
--- /dev/null
+++ b/src/util/test_rsa.c
@@ -0,0 +1,112 @@
+/*
+  This file is part of TALER
+  (C) 2014 Christian Grothoff (and other contributing authors)
+
+  TALER 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 3, or (at your option) any later version.
+
+  TALER 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
+  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file util/test_rsa.c
+ * @brief testcase for utility functions for RSA cryptography
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+#include "platform.h"
+#include "taler_rsa.h"
+#include <gnunet/gnunet_util_lib.h>
+
+#define TEST_PURPOSE UINT32_MAX
+
+
+#define EXITIF(cond)                                              \
+  do {                                                            \
+    if (cond) { GNUNET_break (0); goto EXITIF_exit; }             \
+  } while (0)
+
+int
+main (int argc, char *argv[])
+{
+#define RND_BLK_SIZE 4096
+  unsigned char rnd_blk[RND_BLK_SIZE];
+  struct TALER_RSA_PrivateKey *priv;
+  struct TALER_RSA_PrivateKeyBinaryEncoded *priv_enc;
+  struct TALER_RSA_PublicKeyBinaryEncoded pubkey;
+  struct TALER_RSA_BlindingKey *bkey;
+  struct TALER_RSA_BlindedSignaturePurpose *bsp;
+  struct TALER_RSA_Signature sig;
+  struct GNUNET_HashCode hash;
+  int ret;
+
+  priv = NULL;
+  bsp = NULL;
+  bkey = NULL;
+  ret = 1;
+  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, rnd_blk,
+                              RND_BLK_SIZE);
+  GNUNET_CRYPTO_hash (rnd_blk, RND_BLK_SIZE, &hash);
+  priv = TALER_RSA_key_create ();
+  GNUNET_assert (NULL != priv);
+  EXITIF (GNUNET_OK != TALER_RSA_sign (priv,
+                                       &hash, sizeof (hash),
+                                       &sig));
+  TALER_RSA_key_get_public (priv, &pubkey);
+  EXITIF (NULL == (priv_enc = TALER_RSA_encode_key (priv)));
+  TALER_RSA_key_free (priv);
+  priv = NULL;
+  EXITIF (NULL == (priv = TALER_RSA_decode_key ((const char *) priv_enc,
+                                                ntohs (priv_enc->len))));
+  GNUNET_free (priv_enc);
+  priv_enc = NULL;
+  EXITIF (GNUNET_OK != TALER_RSA_hash_verify (&hash,
+                                              &sig,
+                                              &pubkey));
+  EXITIF (GNUNET_OK != TALER_RSA_verify (rnd_blk,
+                                         RND_BLK_SIZE,
+                                         &sig,
+                                         &pubkey));
+
+  /* test blind signing */
+  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, rnd_blk,
+                              RND_BLK_SIZE);
+  GNUNET_CRYPTO_hash (rnd_blk, RND_BLK_SIZE, &hash);
+  (void) memset (&sig, 0, sizeof (struct TALER_RSA_Signature));
+  EXITIF (NULL == (bkey = TALER_RSA_blinding_key_create ()));
+  EXITIF (NULL == (bsp =
+                   TALER_RSA_message_blind (&hash, sizeof (hash),
+                                              bkey, &pubkey)));
+  EXITIF (GNUNET_OK != TALER_RSA_sign (priv,
+                                       bsp,
+                                       sizeof (struct TALER_RSA_BlindedSignaturePurpose),
+                                       &sig));
+  EXITIF (GNUNET_OK != TALER_RSA_unblind (&sig,
+                                          bkey,
+                                          &pubkey));
+  EXITIF (GNUNET_OK != TALER_RSA_hash_verify (&hash,
+                                              &sig,
+                                              &pubkey));
+  ret = 0;                      /* all OK */
+
+ EXITIF_exit:
+  if (NULL != priv)
+  {
+    TALER_RSA_key_free (priv);
+    priv = NULL;
+  }
+  if (NULL != priv_enc)
+  {
+    GNUNET_free (priv_enc);
+    priv_enc = NULL;
+  }
+  if (NULL != bkey)
+    TALER_RSA_blinding_key_destroy (bkey);
+  GNUNET_free_non_null (bsp);
+  return ret;
+}