2 This file is part of GNUnet
3 Copyright (C) 2014,2015 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
17 * @file util/test_crypto_rsa.c
18 * @brief testcase for utility functions for RSA cryptography
19 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
20 * @author Jeffrey Burdges <burdges@gnunet.org>
24 #include "gnunet_util_lib.h"
33 #define RND_BLK_SIZE 4096
34 unsigned char rnd_blk[RND_BLK_SIZE];
35 struct GNUNET_CRYPTO_RsaPrivateKey *priv;
36 struct GNUNET_CRYPTO_RsaPrivateKey *priv_copy;
37 struct GNUNET_CRYPTO_RsaPublicKey *pub;
38 struct GNUNET_CRYPTO_RsaPublicKey *pub_copy;
39 struct GNUNET_CRYPTO_RsaSignature *sig;
40 struct GNUNET_CRYPTO_RsaSignature *sig_copy;
41 struct GNUNET_CRYPTO_RsaSignature *bsig;
42 struct GNUNET_CRYPTO_RsaBlindingKeySecret bsec;
43 struct GNUNET_HashCode hash;
47 GNUNET_log_setup ("test-rsa", "WARNING", NULL);
48 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
51 GNUNET_CRYPTO_hash (rnd_blk,
54 priv = GNUNET_CRYPTO_rsa_private_key_create (KEY_SIZE);
55 priv_copy = GNUNET_CRYPTO_rsa_private_key_dup (priv);
56 GNUNET_assert (NULL != priv_copy);
57 GNUNET_assert (0 == GNUNET_CRYPTO_rsa_private_key_cmp (priv, priv_copy));
58 pub = GNUNET_CRYPTO_rsa_private_key_get_public (priv);
64 size = GNUNET_CRYPTO_rsa_private_key_encode (priv, &enc);
67 GNUNET_CRYPTO_rsa_private_key_free (priv);
69 priv = GNUNET_CRYPTO_rsa_private_key_decode (enc, size);
70 GNUNET_assert (NULL != priv);
71 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
73 GNUNET_assert (NULL == GNUNET_CRYPTO_rsa_private_key_decode (enc, size));
74 (void) fprintf (stderr, "The above warning is expected.\n");
77 /* try ordinary sig first */
78 sig = GNUNET_CRYPTO_rsa_sign_fdh (priv,
80 sig_copy = GNUNET_CRYPTO_rsa_signature_dup (sig);
81 GNUNET_assert (NULL != sig);
82 GNUNET_assert (0 == GNUNET_CRYPTO_rsa_signature_cmp (sig, sig_copy));
83 pub_copy = GNUNET_CRYPTO_rsa_public_key_dup (pub);
84 GNUNET_assert (NULL != pub_copy);
85 GNUNET_assert (GNUNET_OK ==
86 GNUNET_CRYPTO_rsa_verify (&hash, sig, pub_copy));
87 /* corrupt our hash and see if the signature is still valid */
88 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, &hash,
89 sizeof (struct GNUNET_HashCode));
90 GNUNET_assert (GNUNET_OK != GNUNET_CRYPTO_rsa_verify (&hash,
93 (void) fprintf (stderr, "The above warning is expected.\n");
94 GNUNET_CRYPTO_rsa_signature_free (sig);
96 /* test blind signing */
97 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
100 GNUNET_CRYPTO_rsa_blind (&hash,
104 GNUNET_assert (0 != bsize);
105 bsig = GNUNET_CRYPTO_rsa_sign_blinded (priv,
108 GNUNET_free (blind_buf);
109 sig = GNUNET_CRYPTO_rsa_unblind (bsig,
112 GNUNET_CRYPTO_rsa_signature_free (bsig);
113 GNUNET_assert (GNUNET_OK ==
114 GNUNET_CRYPTO_rsa_verify (&hash, sig, pub));
115 GNUNET_CRYPTO_rsa_signature_free (sig);
116 GNUNET_CRYPTO_rsa_signature_free (sig_copy);
117 GNUNET_CRYPTO_rsa_private_key_free (priv);
118 GNUNET_CRYPTO_rsa_private_key_free (priv_copy);
119 GNUNET_CRYPTO_rsa_public_key_free (pub);
120 GNUNET_CRYPTO_rsa_public_key_free (pub_copy);