1  /*
 2   * Copyright (c) 2018 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  size_t
29  br_rsa_i32_oaep_encrypt(
30  	const br_prng_class **rnd, const br_hash_class *dig,
31  	const void *label, size_t label_len,
32  	const br_rsa_public_key *pk,
33  	void *dst, size_t dst_max_len,
34  	const void *src, size_t src_len)
35  {
36  	size_t dlen;
37  
38  	dlen = br_rsa_oaep_pad(rnd, dig, label, label_len,
39  		pk, dst, dst_max_len, src, src_len);
40  	if (dlen == 0) {
41  		return 0;
42  	}
43  	return dlen & -(size_t)br_rsa_i32_public(dst, dlen, pk);
44  }