text: // SPDX-License-Identifier: BSD-2-Clause
  /* 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_private.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(const 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
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  