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-rw-r--r--src/lib/util/test_crypto_rsa.c149
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diff --git a/src/lib/util/test_crypto_rsa.c b/src/lib/util/test_crypto_rsa.c
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1/*
2 This file is part of GNUnet
3 Copyright (C) 2014,2015 GNUnet e.V.
4
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.
9
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.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file util/test_crypto_rsa.c
23 * @brief testcase for utility functions for RSA cryptography
24 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
25 * @author Jeffrey Burdges <burdges@gnunet.org>
26 */
27
28#include "platform.h"
29#include <gcrypt.h>
30#include "gnunet_util_lib.h"
31
32#define KEY_SIZE 1024
33
34
35int
36main (int argc,
37 char *argv[])
38{
39#define RND_BLK_SIZE 4096
40 unsigned char rnd_blk[RND_BLK_SIZE];
41 struct GNUNET_CRYPTO_RsaPrivateKey *priv;
42 struct GNUNET_CRYPTO_RsaPrivateKey *priv_copy;
43 struct GNUNET_CRYPTO_RsaPublicKey *pub;
44 struct GNUNET_CRYPTO_RsaPublicKey *pub_copy;
45 struct GNUNET_CRYPTO_RsaSignature *sig;
46 struct GNUNET_CRYPTO_RsaSignature *sig_copy;
47 struct GNUNET_CRYPTO_RsaSignature *bsig;
48 struct GNUNET_CRYPTO_RsaBlindingKeySecret bsec;
49 struct GNUNET_HashCode hash;
50 void *blind_buf;
51 size_t bsize;
52
53 GNUNET_log_setup ("test-rsa", "WARNING", NULL);
54 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
55 rnd_blk,
56 RND_BLK_SIZE);
57 GNUNET_CRYPTO_hash (rnd_blk,
58 RND_BLK_SIZE,
59 &hash);
60 priv = GNUNET_CRYPTO_rsa_private_key_create (KEY_SIZE);
61 priv_copy = GNUNET_CRYPTO_rsa_private_key_dup (priv);
62 GNUNET_assert (NULL != priv_copy);
63 GNUNET_assert (0 == GNUNET_CRYPTO_rsa_private_key_cmp (priv, priv_copy));
64 pub = GNUNET_CRYPTO_rsa_private_key_get_public (priv);
65
66 /* Encoding */
67 size_t size;
68 void *enc;
69 enc = NULL;
70 size = GNUNET_CRYPTO_rsa_private_key_encode (priv, &enc);
71
72 /* Decoding */
73 GNUNET_CRYPTO_rsa_private_key_free (priv);
74 priv = NULL;
75 priv = GNUNET_CRYPTO_rsa_private_key_decode (enc, size);
76 GNUNET_assert (NULL != priv);
77 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
78 enc, size);
79 GNUNET_assert (NULL == GNUNET_CRYPTO_rsa_private_key_decode (enc, size));
80 (void) fprintf (stderr, "The above warning is expected.\n");
81 GNUNET_free (enc);
82
83 /* try ordinary sig first */
84 sig = GNUNET_CRYPTO_rsa_sign_fdh (priv,
85 &hash);
86 sig_copy = GNUNET_CRYPTO_rsa_signature_dup (sig);
87 GNUNET_assert (NULL != sig);
88 GNUNET_assert (0 == GNUNET_CRYPTO_rsa_signature_cmp (sig, sig_copy));
89 pub_copy = GNUNET_CRYPTO_rsa_public_key_dup (pub);
90 GNUNET_assert (NULL != pub_copy);
91 GNUNET_assert (GNUNET_OK ==
92 GNUNET_CRYPTO_rsa_verify (&hash, sig, pub_copy));
93 {
94 void *buf;
95 size_t buf_size;
96 struct GNUNET_CRYPTO_RsaPublicKey *pub2;
97 struct GNUNET_CRYPTO_RsaSignature *sig2;
98
99 buf_size = GNUNET_CRYPTO_rsa_public_key_encode (pub,
100 &buf);
101 pub2 = GNUNET_CRYPTO_rsa_public_key_decode (buf,
102 buf_size);
103 GNUNET_free (buf);
104 buf_size = GNUNET_CRYPTO_rsa_signature_encode (sig,
105 &buf);
106 sig2 = GNUNET_CRYPTO_rsa_signature_decode (buf,
107 buf_size);
108 GNUNET_free (buf);
109 GNUNET_assert (GNUNET_OK ==
110 GNUNET_CRYPTO_rsa_verify (&hash, sig2, pub2));
111 GNUNET_CRYPTO_rsa_public_key_free (pub2);
112 GNUNET_CRYPTO_rsa_signature_free (sig2);
113 }
114 /* corrupt our hash and see if the signature is still valid */
115 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, &hash,
116 sizeof(struct GNUNET_HashCode));
117 GNUNET_assert (GNUNET_OK != GNUNET_CRYPTO_rsa_verify (&hash,
118 sig,
119 pub));
120 (void) fprintf (stderr, "The above warning is expected.\n");
121 GNUNET_CRYPTO_rsa_signature_free (sig);
122
123 /* test blind signing */
124 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
125 &bsec,
126 sizeof(bsec));
127 GNUNET_CRYPTO_rsa_blind (&hash,
128 &bsec,
129 pub,
130 &blind_buf, &bsize);
131 GNUNET_assert (0 != bsize);
132 bsig = GNUNET_CRYPTO_rsa_sign_blinded (priv,
133 blind_buf,
134 bsize);
135 GNUNET_free (blind_buf);
136 sig = GNUNET_CRYPTO_rsa_unblind (bsig,
137 &bsec,
138 pub);
139 GNUNET_CRYPTO_rsa_signature_free (bsig);
140 GNUNET_assert (GNUNET_OK ==
141 GNUNET_CRYPTO_rsa_verify (&hash, sig, pub));
142 GNUNET_CRYPTO_rsa_signature_free (sig);
143 GNUNET_CRYPTO_rsa_signature_free (sig_copy);
144 GNUNET_CRYPTO_rsa_private_key_free (priv);
145 GNUNET_CRYPTO_rsa_private_key_free (priv_copy);
146 GNUNET_CRYPTO_rsa_public_key_free (pub);
147 GNUNET_CRYPTO_rsa_public_key_free (pub_copy);
148 return 0;
149}
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