1 /*
2  * Copyright (c) 2017 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 #if BR_INT128 || BR_UMUL128
28 
29 /* see bearssl_rsa.h */
30 uint32_t
31 br_rsa_i62_pkcs1_vrfy(const unsigned char *x, size_t xlen,
32 	const unsigned char *hash_oid, size_t hash_len,
33 	const br_rsa_public_key *pk, unsigned char *hash_out)
34 {
35 	unsigned char sig[BR_MAX_RSA_SIZE >> 3];
36 
37 	if (xlen > (sizeof sig)) {
38 		return 0;
39 	}
40 	memcpy(sig, x, xlen);
41 	if (!br_rsa_i62_public(sig, xlen, pk)) {
42 		return 0;
43 	}
44 	return br_rsa_pkcs1_sig_unpad(sig, xlen, hash_oid, hash_len, hash_out);
45 }
46 
47 /* see bearssl_rsa.h */
48 br_rsa_pkcs1_vrfy
49 br_rsa_i62_pkcs1_vrfy_get(void)
50 {
51 	return &br_rsa_i62_pkcs1_vrfy;
52 }
53 
54 #else
55 
56 /* see bearssl_rsa.h */
57 br_rsa_pkcs1_vrfy
58 br_rsa_i62_pkcs1_vrfy_get(void)
59 {
60 	return 0;
61 }
62 
63 #endif
64