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 SYSTEM_CORE_INCLUDE_MINCRYPT_RSA_H_
29 #define SYSTEM_CORE_INCLUDE_MINCRYPT_RSA_H_
30 
31 #include <inttypes.h>
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
37 #define RSANUMBYTES 256           /* 2048 bit key length */
38 #define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t))
39 
40 typedef 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     int exponent;             /* 3 or 65537 */
46 } RSAPublicKey;
47 
48 int RSA_verify(const RSAPublicKey *key,
49                const uint8_t* signature,
50                const int len,
51                const uint8_t* hash,
52                const int hash_len);
53 
54 #ifdef __cplusplus
55 }
56 #endif
57 
58 #endif // SYSTEM_CORE_INCLUDE_MINCRYPT_RSA_H_
59