1 /* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * * Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * * Redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution. 11 * * Neither the name of Google Inc. nor the names of its contributors may 12 * be used to endorse or promote products derived from this software 13 * without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 18 * EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef CONSTRAINEDCRYPTO_P256_ECDSA_H_ 28 #define CONSTRAINEDCRYPTO_P256_ECDSA_H_ 29 30 // Using current directory as relative include path here since 31 // this code typically gets lifted into a variety of build systems 32 // and directory structures. 33 #include "p256.h" 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 // Returns 0 if {r,s} is not a signature on message for 40 // public key {key_x,key_y}. 41 // 42 // Note: message is a p256_int. 43 // Convert from a binary string using p256_from_bin(). 44 int p256_ecdsa_verify(const p256_int* key_x, 45 const p256_int* key_y, 46 const p256_int* message, 47 const p256_int* r, const p256_int* s); 48 49 #ifdef __cplusplus 50 } 51 #endif 52 53 #endif // CONSTRAINEDCRYPTO_P256_ECDSA_H_ 54