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 CONSTRAINEDCRYPTO_RSA_H_ 29 #define CONSTRAINEDCRYPTO_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 // CONSTRAINEDCRYPTO_RSA_H_ 59