1*0957b409SSimon J. Gerraty /*
2*0957b409SSimon J. Gerraty * Copyright (c) 2018 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_oaep_decrypt(const br_hash_class * dig,const void * label,size_t label_len,const br_rsa_private_key * sk,void * data,size_t * len)29*0957b409SSimon J. Gerraty br_rsa_i31_oaep_decrypt(const br_hash_class *dig,
30*0957b409SSimon J. Gerraty const void *label, size_t label_len,
31*0957b409SSimon J. Gerraty const br_rsa_private_key *sk, void *data, size_t *len)
32*0957b409SSimon J. Gerraty {
33*0957b409SSimon J. Gerraty uint32_t r;
34*0957b409SSimon J. Gerraty
35*0957b409SSimon J. Gerraty if (*len != ((sk->n_bitlen + 7) >> 3)) {
36*0957b409SSimon J. Gerraty return 0;
37*0957b409SSimon J. Gerraty }
38*0957b409SSimon J. Gerraty r = br_rsa_i31_private(data, sk);
39*0957b409SSimon J. Gerraty r &= br_rsa_oaep_unpad(dig, label, label_len, data, len);
40*0957b409SSimon J. Gerraty return r;
41*0957b409SSimon J. Gerraty }
42