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annotate libtomcrypt/src/pk/asn1/der/generalizedtime/der_length_generalizedtime.c @ 1659:d32bcb5c557d

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Add Ed25519 support (#91) * Add support for Ed25519 as a public key type Ed25519 is a elliptic curve signature scheme that offers better security than ECDSA and DSA and good performance. It may be used for both user and host keys. OpenSSH key import and fuzzer are not supported yet. Initially inspired by Peter Szabo. * Add curve25519 and ed25519 fuzzers * Add import and export of Ed25519 keys
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Wed, 11 Mar 2020 21:09:45 +0500
parents 6dba84798cd5
children
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rev   line source
1471
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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 #include "tomcrypt.h"
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10
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11 /**
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12 @file der_length_utctime.c
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13 ASN.1 DER, get length of GeneralizedTime, Steffen Jaeckel
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14 Based on der_length_utctime.c
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15 */
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16
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17 #ifdef LTC_DER
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18
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19 /**
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20 Gets length of DER encoding of GeneralizedTime
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21 @param gtime The GeneralizedTime structure to get the size of
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22 @param outlen [out] The length of the DER encoding
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23 @return CRYPT_OK if successful
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24 */
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25 int der_length_generalizedtime(ltc_generalizedtime *gtime, unsigned long *outlen)
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26 {
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27 LTC_ARGCHK(outlen != NULL);
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28 LTC_ARGCHK(gtime != NULL);
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29
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30 if (gtime->fs == 0) {
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31 /* we encode as YYYYMMDDhhmmssZ */
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32 *outlen = 2 + 14 + 1;
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33 } else {
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34 unsigned long len = 2 + 14 + 1;
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35 unsigned fs = gtime->fs;
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36 do {
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37 fs /= 10;
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38 len++;
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39 } while(fs != 0);
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40 if (gtime->off_hh == 0 && gtime->off_mm == 0) {
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41 /* we encode as YYYYMMDDhhmmss.fsZ */
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42 len += 1;
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43 }
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44 else {
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45 /* we encode as YYYYMMDDhhmmss.fs{+|-}hh'mm' */
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46 len += 5;
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47 }
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48 *outlen = len;
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49 }
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50
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51 return CRYPT_OK;
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52 }
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53
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54 #endif
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55
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56 /* ref: $Format:%D$ */
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57 /* git commit: $Format:%H$ */
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58 /* commit time: $Format:%ai$ */