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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 $ */ |
