Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/utctime/der_encode_utctime.c @ 1721:4877afd51e04

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Added tag DROPBEAR_2020.79 for changeset e2e4929d057b
author Matt Johnston <matt@ucc.asn.au>
date Mon, 15 Jun 2020 23:51:39 +0800
parents 6dba84798cd5
children
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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_encode_utctime.c
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13 ASN.1 DER, encode a UTCTIME, Tom St Denis
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14 */
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16 #ifdef LTC_DER
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17
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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18 static const char * const baseten = "0123456789";
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19
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20 #define STORE_V(y) \
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21 out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \
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22 out[x++] = der_ia5_char_encode(baseten[y % 10]);
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23
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24 /**
382
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25 Encodes a UTC time structure in DER format
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26 @param utctime The UTC time structure to encode
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27 @param out The destination of the DER encoding of the UTC time structure
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28 @param outlen [in/out] The length of the DER encoding
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29 @return CRYPT_OK if successful
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30 */
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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31 int der_encode_utctime(ltc_utctime *utctime,
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32 unsigned char *out, unsigned long *outlen)
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33 {
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34 unsigned long x, tmplen;
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35 int err;
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36
285
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37 LTC_ARGCHK(utctime != NULL);
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38 LTC_ARGCHK(out != NULL);
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39 LTC_ARGCHK(outlen != NULL);
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40
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41 if ((err = der_length_utctime(utctime, &tmplen)) != CRYPT_OK) {
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42 return err;
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43 }
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44 if (tmplen > *outlen) {
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45 *outlen = tmplen;
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46 return CRYPT_BUFFER_OVERFLOW;
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47 }
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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48
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49 /* store header */
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50 out[0] = 0x17;
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51
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52 /* store values */
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53 x = 2;
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54 STORE_V(utctime->YY);
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55 STORE_V(utctime->MM);
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56 STORE_V(utctime->DD);
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57 STORE_V(utctime->hh);
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58 STORE_V(utctime->mm);
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59 STORE_V(utctime->ss);
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60
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61 if (utctime->off_mm || utctime->off_hh) {
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62 out[x++] = der_ia5_char_encode(utctime->off_dir ? '-' : '+');
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63 STORE_V(utctime->off_hh);
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64 STORE_V(utctime->off_mm);
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65 } else {
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66 out[x++] = der_ia5_char_encode('Z');
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67 }
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68
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69 /* store length */
382
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70 out[1] = (unsigned char)(x - 2);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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71
285
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72 /* all good let's return */
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73 *outlen = x;
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74 return CRYPT_OK;
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75 }
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76
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77 #endif
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78
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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79 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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80 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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81 /* commit time: $Format:%ai$ */