Mercurial > dropbear
view libtomcrypt/src/pk/asn1/der/utctime/der_encode_utctime.c @ 1180:1637dbd26212 DROPBEAR_2015.69
2015.69
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Wed, 25 Nov 2015 23:07:47 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://libtomcrypt.com */ #include "tomcrypt.h" /** @file der_encode_utctime.c ASN.1 DER, encode a UTCTIME, Tom St Denis */ #ifdef LTC_DER static const char *baseten = "0123456789"; #define STORE_V(y) \ out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \ out[x++] = der_ia5_char_encode(baseten[y % 10]); /** Encodes a UTC time structure in DER format @param utctime The UTC time structure to encode @param out The destination of the DER encoding of the UTC time structure @param outlen [in/out] The length of the DER encoding @return CRYPT_OK if successful */ int der_encode_utctime(ltc_utctime *utctime, unsigned char *out, unsigned long *outlen) { unsigned long x, tmplen; int err; LTC_ARGCHK(utctime != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); if ((err = der_length_utctime(utctime, &tmplen)) != CRYPT_OK) { return err; } if (tmplen > *outlen) { *outlen = tmplen; return CRYPT_BUFFER_OVERFLOW; } /* store header */ out[0] = 0x17; /* store values */ x = 2; STORE_V(utctime->YY); STORE_V(utctime->MM); STORE_V(utctime->DD); STORE_V(utctime->hh); STORE_V(utctime->mm); STORE_V(utctime->ss); if (utctime->off_mm || utctime->off_hh) { out[x++] = der_ia5_char_encode(utctime->off_dir ? '-' : '+'); STORE_V(utctime->off_hh); STORE_V(utctime->off_mm); } else { out[x++] = der_ia5_char_encode('Z'); } /* store length */ out[1] = (unsigned char)(x - 2); /* all good let's return */ *outlen = x; return CRYPT_OK; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/utctime/der_encode_utctime.c,v $ */ /* $Revision: 1.9 $ */ /* $Date: 2006/12/04 21:34:03 $ */