Added test for rsa_decrypt_tr with invalid key.

2 files changed, 10 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index df5a79fe..0959eb6f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2015-09-14  Niels Möller  <nisse@lysator.liu.se>
 
+	* testsuite/rsa-encrypt-test.c (test_main): Added test with
+	invalid private key.
+
 	* rsa-sign-tr.c (rsa_compute_root_tr): New file and function.
 	* rsa.h: Declare it.
 	* rsa-pkcs1-sign-tr.c (rsa_pkcs1_sign_tr): Use rsa_compute_root_tr.
diff --git a/testsuite/rsa-encrypt-test.c b/testsuite/rsa-encrypt-test.c
index 7104e24b..d20dee91 100644
--- a/testsuite/rsa-encrypt-test.c
+++ b/testsuite/rsa-encrypt-test.c
@@ -39,7 +39,6 @@ test_main(void)
 
   if (verbose)
     {
-      /* In which GMP version was gmp_fprintf introduced? */
       fprintf(stderr, "encrypted: ");
       mpz_out_str(stderr, 10, gibberish);
     }
@@ -78,6 +77,13 @@ test_main(void)
   ASSERT(MEMEQ(msg_length, msg, decrypted));
   ASSERT(decrypted[msg_length] == after);
 
+  /* Test invalid key. */
+  mpz_add_ui (key.q, key.q, 2);
+  decrypted_length = key.size;
+  ASSERT(!rsa_decrypt_tr(&pub, &key,
+			 &lfib, (nettle_random_func *) knuth_lfib_random,
+			 &decrypted_length, decrypted, gibberish));
+
   rsa_private_key_clear(&key);
   rsa_public_key_clear(&pub);
   mpz_clear(gibberish);