1*0957b409SSimon J. Gerraty /*
2*0957b409SSimon J. Gerraty * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3*0957b409SSimon J. Gerraty *
4*0957b409SSimon J. Gerraty * Permission is hereby granted, free of charge, to any person obtaining
5*0957b409SSimon J. Gerraty * a copy of this software and associated documentation files (the
6*0957b409SSimon J. Gerraty * "Software"), to deal in the Software without restriction, including
7*0957b409SSimon J. Gerraty * without limitation the rights to use, copy, modify, merge, publish,
8*0957b409SSimon J. Gerraty * distribute, sublicense, and/or sell copies of the Software, and to
9*0957b409SSimon J. Gerraty * permit persons to whom the Software is furnished to do so, subject to
10*0957b409SSimon J. Gerraty * the following conditions:
11*0957b409SSimon J. Gerraty *
12*0957b409SSimon J. Gerraty * The above copyright notice and this permission notice shall be
13*0957b409SSimon J. Gerraty * included in all copies or substantial portions of the Software.
14*0957b409SSimon J. Gerraty *
15*0957b409SSimon J. Gerraty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16*0957b409SSimon J. Gerraty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17*0957b409SSimon J. Gerraty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18*0957b409SSimon J. Gerraty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19*0957b409SSimon J. Gerraty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20*0957b409SSimon J. Gerraty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21*0957b409SSimon J. Gerraty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22*0957b409SSimon J. Gerraty * SOFTWARE.
23*0957b409SSimon J. Gerraty */
24*0957b409SSimon J. Gerraty
25*0957b409SSimon J. Gerraty #include "inner.h"
26*0957b409SSimon J. Gerraty
27*0957b409SSimon J. Gerraty /* see bearssl_rsa.h */
28*0957b409SSimon J. Gerraty uint32_t
br_rsa_i31_pkcs1_vrfy(const unsigned char * x,size_t xlen,const unsigned char * hash_oid,size_t hash_len,const br_rsa_public_key * pk,unsigned char * hash_out)29*0957b409SSimon J. Gerraty br_rsa_i31_pkcs1_vrfy(const unsigned char *x, size_t xlen,
30*0957b409SSimon J. Gerraty const unsigned char *hash_oid, size_t hash_len,
31*0957b409SSimon J. Gerraty const br_rsa_public_key *pk, unsigned char *hash_out)
32*0957b409SSimon J. Gerraty {
33*0957b409SSimon J. Gerraty unsigned char sig[BR_MAX_RSA_SIZE >> 3];
34*0957b409SSimon J. Gerraty
35*0957b409SSimon J. Gerraty if (xlen > (sizeof sig)) {
36*0957b409SSimon J. Gerraty return 0;
37*0957b409SSimon J. Gerraty }
38*0957b409SSimon J. Gerraty memcpy(sig, x, xlen);
39*0957b409SSimon J. Gerraty if (!br_rsa_i31_public(sig, xlen, pk)) {
40*0957b409SSimon J. Gerraty return 0;
41*0957b409SSimon J. Gerraty }
42*0957b409SSimon J. Gerraty return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out);
43*0957b409SSimon J. Gerraty }
44