view libtomcrypt/src/pk/asn1/der/generalizedtime/der_length_generalizedtime.c @ 1499:2d450c1056e3

options: Complete the transition to numeric toggles (`#if') For the sake of review, this commit alters only the code; the affiliated comments within the source files also need to be updated, but doing so now would obscure the operational changes that have been made here. * All on/off options have been switched to the numeric `#if' variant; that is the only way to make this `default_options.h.in' thing work in a reasonable manner. * There is now some very minor compile-time checking of the user's choice of options. * NO_FAST_EXPTMOD doesn't seem to be used, so it has been removed. * ENABLE_USER_ALGO_LIST was supposed to be renamed DROPBEAR_USER_ALGO_LIST, and this commit completes that work. * DROPBEAR_FUZZ seems to be a relatively new, as-yet undocumented option, which was added by the following commit: commit 6e0b539e9ca0b5628c6c5a3d118ad6a2e79e8039 Author: Matt Johnston <[email protected]> Date: Tue May 23 22:29:21 2017 +0800 split out checkpubkey_line() separately It has now been added to `sysoptions.h' and defined as `0' by default. * The configuration option `DROPBEAR_PASSWORD_ENV' is no longer listed in `default_options.h.in'; it is no longer meant to be set by the user, and is instead left to be defined in `sysoptions.h' (where it was already being defined) as merely the name of the environment variable in question: DROPBEAR_PASSWORD To enable or disable use of that environment variable, the user must now toggle `DROPBEAR_USE_DROPBEAR_PASSWORD'. * The sFTP support is now toggled by setting `DROPBEAR_SFTPSERVER', and the path of the sFTP server program is set independently through the usual SFTPSERVER_PATH.
author Michael Witten <mfwitten@gmail.com>
date Thu, 20 Jul 2017 19:38:26 +0000
parents 6dba84798cd5
children
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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.
 */
#include "tomcrypt.h"

/**
  @file der_length_utctime.c
  ASN.1 DER, get length of GeneralizedTime, Steffen Jaeckel
  Based on der_length_utctime.c
*/

#ifdef LTC_DER

/**
  Gets length of DER encoding of GeneralizedTime
  @param gtime        The GeneralizedTime structure to get the size of
  @param outlen [out] The length of the DER encoding
  @return CRYPT_OK if successful
*/
int der_length_generalizedtime(ltc_generalizedtime *gtime, unsigned long *outlen)
{
   LTC_ARGCHK(outlen  != NULL);
   LTC_ARGCHK(gtime != NULL);

   if (gtime->fs == 0) {
      /* we encode as YYYYMMDDhhmmssZ */
      *outlen = 2 + 14 + 1;
   } else {
      unsigned long len = 2 + 14 + 1;
      unsigned fs = gtime->fs;
      do {
         fs /= 10;
         len++;
      } while(fs != 0);
      if (gtime->off_hh == 0 && gtime->off_mm == 0) {
         /* we encode as YYYYMMDDhhmmss.fsZ */
         len += 1;
      }
      else {
         /* we encode as YYYYMMDDhhmmss.fs{+|-}hh'mm' */
         len += 5;
      }
      *outlen = len;
   }

   return CRYPT_OK;
}

#endif

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