rsa.h revision 4f6e8d7a00cbeda1e70cc15be9c4af1018bdad53 
1/* rsa.h
2**
3** Copyright 2008, 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#ifndef _EMBEDDED_RSA_H_
29#define _EMBEDDED_RSA_H_
30
31#include <inttypes.h>
32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
37#define RSANUMBYTES 256           /* 2048 bit key length */
38#define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t))
39
40typedef struct RSAPublicKey {
41    int len;                  /* Length of n[] in number of uint32_t */
42    uint32_t n0inv;           /* -1 / n[0] mod 2^32 */
43    uint32_t n[RSANUMWORDS];  /* modulus as little endian array */
44    uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */
45} RSAPublicKey;
46
47int RSA_verify(const RSAPublicKey *key,
48               const uint8_t* signature,
49               const int len,
50               const uint8_t* sha);
51
52#ifdef __cplusplus
53}
54#endif
55
56#endif
57