Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/boolean/der_encode_boolean.c @ 1333:6fafb500de88

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reduce buf->pos if shrinking
author Matt Johnston <matt@ucc.asn.au>
date Sat, 13 May 2017 23:43:09 +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_encode_boolean.c
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15 ASN.1 DER, encode 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 Store a BOOLEAN
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23 @param in The boolean to encode
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24 @param out [out] The destination for the DER encoded BOOLEAN
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25 @param outlen [in/out] The max size and resulting size of the DER BOOLEAN
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26 @return CRYPT_OK if successful
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27 */
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28 int der_encode_boolean(int in,
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29 unsigned char *out, unsigned long *outlen)
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30 {
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31 LTC_ARGCHK(outlen != NULL);
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32 LTC_ARGCHK(out != NULL);
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33
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34 if (*outlen < 3) {
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35 *outlen = 3;
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36 return CRYPT_BUFFER_OVERFLOW;
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37 }
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38
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39 *outlen = 3;
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40 out[0] = 0x01;
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41 out[1] = 0x01;
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42 out[2] = in ? 0xFF : 0x00;
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43
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44 return CRYPT_OK;
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45 }
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46
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47 #endif
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48
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49 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/boolean/der_encode_boolean.c,v $ */
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50 /* $Revision: 1.3 $ */
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51 /* $Date: 2006/06/16 21:53:41 $ */