From: Christian Fuchs <christian.fuchs@cfuchs.net>
Date: Sun, 26 Jan 2014 17:49:27 +0000 (+0000)
Subject: - wrote a proper test for crypto-paillier
X-Git-Tag: initial-import-from-subversion-38251~4936
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d91dfa3baa460287122c9ea5eee832929b0a6c57;p=oweals%2Fgnunet.git

- wrote a proper test for crypto-paillier
---

diff --git a/src/util/test_crypto_paillier.c b/src/util/test_crypto_paillier.c
index f380b56f0..386f21d7c 100644
--- a/src/util/test_crypto_paillier.c
+++ b/src/util/test_crypto_paillier.c
@@ -31,25 +31,47 @@
 int
 main (int argc, char *argv[])
 {
-  struct GNUNET_CRYPTO_PaillierPlaintext plaintext;
-  struct GNUNET_CRYPTO_PaillierPlaintext plaintext_result;
-  struct GNUNET_CRYPTO_PaillierCiphertext ciphertext;
+  int ret;
+  gcry_mpi_t m1;
+  gcry_mpi_t m2;
+  gcry_mpi_t result;
+  gcry_mpi_t hom_result;
+  struct GNUNET_CRYPTO_PaillierCiphertext c1;
+  struct GNUNET_CRYPTO_PaillierCiphertext c2;
+  struct GNUNET_CRYPTO_PaillierCiphertext c_result;
+  
   struct GNUNET_CRYPTO_PaillierPublicKey public_key;
   struct GNUNET_CRYPTO_PaillierPrivateKey private_key;
 
   GNUNET_CRYPTO_paillier_create (&public_key, &private_key);
 
-  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, &plaintext, sizeof plaintext);
-  plaintext.bits[0] = 0;
+  GNUNET_assert (NULL != (m1 = gcry_mpi_new (GNUNET_CRYPTO_PAILLIER_BITS-1)));
+  GNUNET_assert (NULL != (m2 = gcry_mpi_new (GNUNET_CRYPTO_PAILLIER_BITS-1)));
+  GNUNET_assert (NULL != (hom_result = gcry_mpi_new (GNUNET_CRYPTO_PAILLIER_BITS)));
+  gcry_mpi_randomize (m1, GNUNET_CRYPTO_PAILLIER_BITS-1, GCRY_WEAK_RANDOM);
+  gcry_mpi_randomize (m2, GNUNET_CRYPTO_PAILLIER_BITS-1, GCRY_WEAK_RANDOM);
+  gcry_mpi_add(result,m1,m2);
 
-  GNUNET_CRYPTO_paillier_encrypt (&public_key, &plaintext, &ciphertext);
+  if (1 != (ret = GNUNET_CRYPTO_paillier_encrypt (&public_key, m1, &c1))){
+    printf ("GNUNET_CRYPTO_paillier_encrypt failed, should return 1 allowed operation, got %d!\n", ret);
+    return 1;
+  }
+  
+  GNUNET_CRYPTO_paillier_encrypt (&public_key, m2, &c2);
 
+  if (0 != (ret = GNUNET_CRYPTO_paillier_hom_add (&public_key, &c1,&c2, &c_result))){
+    printf ("GNUNET_CRYPTO_paillier_hom_add failed, expected 0 remaining operations, got %d!\n", ret);
+    return 1;
+  }
+  
   GNUNET_CRYPTO_paillier_decrypt (&private_key, &public_key,
-                                  &ciphertext, &plaintext_result);
+                                  &c_result, hom_result);
 
-  if (0 != memcmp (&plaintext, &plaintext_result, sizeof plaintext))
+  if (0 != gcry_mpi_cmp(result, hom_result))
+    printf ("GNUNET_CRYPTO_paillier miscalculated!\n");
     return 1;
+  
   return 0;
 }
 
-/* end of test_crypto_paillier.c */
+/* end of test_crypto_paillier.c */
\ No newline at end of file