1 /* 2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 #include "inner.h" 26 27 /* see bearssl_rsa.h */ 28 uint32_t 29 br_rsa_i31_pkcs1_vrfy(const unsigned char *x, size_t xlen, 30 const unsigned char *hash_oid, size_t hash_len, 31 const br_rsa_public_key *pk, unsigned char *hash_out) 32 { 33 unsigned char sig[BR_MAX_RSA_SIZE >> 3]; 34 35 if (xlen > (sizeof sig)) { 36 return 0; 37 } 38 memcpy(sig, x, xlen); 39 if (!br_rsa_i31_public(sig, xlen, pk)) { 40 return 0; 41 } 42 return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out); 43 } 44