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  /*
28   * This file contains the encoded OID for the standard hash functions.
29   * Such OID appear in, for instance, the PKCS#1 v1.5 padding for RSA
30   * signatures.
31   */
32  
33  static const unsigned char md5_OID[] = {
34  	0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x05
35  };
36  
37  static const unsigned char sha1_OID[] = {
38  	0x2B, 0x0E, 0x03, 0x02, 0x1A
39  };
40  
41  static const unsigned char sha224_OID[] = {
42  	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04
43  };
44  
45  static const unsigned char sha256_OID[] = {
46  	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01
47  };
48  
49  static const unsigned char sha384_OID[] = {
50  	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02
51  };
52  
53  static const unsigned char sha512_OID[] = {
54  	0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03
55  };
56  
57  /* see inner.h */
58  const unsigned char *
59  br_digest_OID(int digest_id, size_t *len)
60  {
61  	switch (digest_id) {
62  	case br_md5_ID:
63  		*len = sizeof md5_OID;
64  		return md5_OID;
65  	case br_sha1_ID:
66  		*len = sizeof sha1_OID;
67  		return sha1_OID;
68  	case br_sha224_ID:
69  		*len = sizeof sha224_OID;
70  		return sha224_OID;
71  	case br_sha256_ID:
72  		*len = sizeof sha256_OID;
73  		return sha256_OID;
74  	case br_sha384_ID:
75  		*len = sizeof sha384_OID;
76  		return sha384_OID;
77  	case br_sha512_ID:
78  		*len = sizeof sha512_OID;
79  		return sha512_OID;
80  	default:
81  		*len = 0;
82  		return NULL;
83  	}
84  }