rsa.c revision 8e5b63d045e988f13d1ee9b7797db28fde15bbfc 
1/* rsa.c
2**
3** Copyright 2012, The Android Open Source Project
4**
5** Redistribution and use in source and binary forms, with or without
6** modification, are permitted provided that the following conditions are met:
7**     * Redistributions of source code must retain the above copyright
8**       notice, this list of conditions and the following disclaimer.
9**     * Redistributions in binary form must reproduce the above copyright
10**       notice, this list of conditions and the following disclaimer in the
11**       documentation and/or other materials provided with the distribution.
12**     * Neither the name of Google Inc. nor the names of its contributors may
13**       be used to endorse or promote products derived from this software
14**       without specific prior written permission.
15**
16** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
17** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*/
27
28#include "mincrypt/rsa.h"
29
30int RSA_e_f4_verify(const RSAPublicKey* key,
31                    const uint8_t* signature,
32                    const int len,
33                    const uint8_t* hash,
34                    const int hash_len);
35
36int RSA_e_3_verify(const RSAPublicKey *key,
37                   const uint8_t *signature,
38                   const int len,
39                   const uint8_t *hash,
40                   const int hash_len);
41
42int RSA_verify(const RSAPublicKey *key,
43               const uint8_t *signature,
44               const int len,
45               const uint8_t *hash,
46               const int hash_len) {
47    switch (key->exponent) {
48        case 3:
49            return RSA_e_3_verify(key, signature, len, hash, hash_len);
50            break;
51        case 65537:
52            return RSA_e_f4_verify(key, signature, len, hash, hash_len);
53            break;
54        default:
55            return 0;
56    }
57}
58