Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c @ 766:d1575fdc29a6 ecc

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start on ecdsa keys
author Matt Johnston <matt@ucc.asn.au>
date Tue, 09 Apr 2013 00:36:04 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
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382
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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12
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13 /**
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14 @file der_decode_boolean.c
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15 ASN.1 DER, decode a BOOLEAN, Tom St Denis
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16 */
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17
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18
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19 #ifdef LTC_DER
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20
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21 /**
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22 Read a BOOLEAN
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23 @param in The destination for the DER encoded BOOLEAN
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24 @param inlen The size of the DER BOOLEAN
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25 @param out [out] The boolean to decode
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26 @return CRYPT_OK if successful
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27 */
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28 int der_decode_boolean(const unsigned char *in, unsigned long inlen,
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29 int *out)
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30 {
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31 LTC_ARGCHK(in != NULL);
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32 LTC_ARGCHK(out != NULL);
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33
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34 if (inlen != 3 || in[0] != 0x01 || in[1] != 0x01 || (in[2] != 0x00 && in[2] != 0xFF)) {
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35 return CRYPT_INVALID_ARG;
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36 }
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37
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38 *out = (in[2]==0xFF) ? 1 : 0;
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39
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40 return CRYPT_OK;
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41 }
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42
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43 #endif
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44
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45 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c,v $ */
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46 /* $Revision: 1.1 $ */
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47 /* $Date: 2006/04/22 17:01:59 $ */