1/* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
10 */
11#include "tomcrypt.h"
12
13/**
14  @file der_decode_boolean.c
15  ASN.1 DER, decode a BOOLEAN, Tom St Denis
16*/
17
18
19#ifdef LTC_DER
20
21/**
22  Read a BOOLEAN
23  @param in      The destination for the DER encoded BOOLEAN
24  @param inlen   The size of the DER BOOLEAN
25  @param out     [out]  The boolean to decode
26  @return CRYPT_OK if successful
27*/
28int der_decode_boolean(const unsigned char *in, unsigned long inlen,
29                                       int *out)
30{
31   LTC_ARGCHK(in  != NULL);
32   LTC_ARGCHK(out != NULL);
33
34   if (inlen != 3 || in[0] != 0x01 || in[1] != 0x01 || (in[2] != 0x00 && in[2] != 0xFF)) {
35      return CRYPT_INVALID_ARG;
36   }
37
38   *out = (in[2]==0xFF) ? 1 : 0;
39
40   return CRYPT_OK;
41}
42
43#endif
44
45/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c,v $ */
46/* $Revision: 1.1 $ */
47/* $Date: 2006/04/22 17:01:59 $ */
48