1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis */
2 /* SPDX-License-Identifier: Unlicense */
3 #include "tomcrypt_private.h"
4 
5 /**
6   @file der_encode_boolean.c
7   ASN.1 DER, encode a BOOLEAN, Tom St Denis
8 */
9 
10 
11 #ifdef LTC_DER
12 
13 /**
14   Store a BOOLEAN
15   @param in       The boolean to encode
16   @param out      [out] The destination for the DER encoded BOOLEAN
17   @param outlen   [in/out] The max size and resulting size of the DER BOOLEAN
18   @return CRYPT_OK if successful
19 */
der_encode_boolean(int in,unsigned char * out,unsigned long * outlen)20 int der_encode_boolean(int in,
21                        unsigned char *out, unsigned long *outlen)
22 {
23    LTC_ARGCHK(outlen != NULL);
24    LTC_ARGCHK(out    != NULL);
25 
26    if (*outlen < 3) {
27        *outlen = 3;
28        return CRYPT_BUFFER_OVERFLOW;
29    }
30 
31    *outlen = 3;
32    out[0] = 0x01;
33    out[1] = 0x01;
34    out[2] = in ? 0xFF : 0x00;
35 
36    return CRYPT_OK;
37 }
38 
39 #endif
40