Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c @ 1680:5e763ad6e2e0

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author Matt Johnston <matt@ucc.asn.au>
date Sun, 24 May 2020 13:34:19 +0800
parents 6dba84798cd5
children
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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 #include "tomcrypt.h"
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10
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11 /**
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12 @file der_decode_boolean.c
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13 ASN.1 DER, decode a BOOLEAN, Tom St Denis
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14 */
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15
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17 #ifdef LTC_DER
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19 /**
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20 Read a BOOLEAN
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21 @param in The destination for the DER encoded BOOLEAN
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22 @param inlen The size of the DER BOOLEAN
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23 @param out [out] The boolean to decode
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24 @return CRYPT_OK if successful
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25 */
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26 int der_decode_boolean(const unsigned char *in, unsigned long inlen,
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27 int *out)
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28 {
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29 LTC_ARGCHK(in != NULL);
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30 LTC_ARGCHK(out != NULL);
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31
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32 if (inlen < 3 || in[0] != 0x01 || in[1] != 0x01 || (in[2] != 0x00 && in[2] != 0xFF)) {
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33 return CRYPT_INVALID_ARG;
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34 }
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35
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36 *out = (in[2]==0xFF) ? 1 : 0;
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37
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38 return CRYPT_OK;
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39 }
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41 #endif
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42
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43 /* ref: $Format:%D$ */
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44 /* git commit: $Format:%H$ */
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45 /* commit time: $Format:%ai$ */