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annotate libtomcrypt/src/pk/asn1/der/generalizedtime/der_encode_generalizedtime.c @ 1902:4a6725ac957c

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Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
parents 6dba84798cd5
children
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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_encode_utctime.c
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13 ASN.1 DER, encode a GeneralizedTime, Steffen Jaeckel
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14 Based on der_encode_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 static const char * const baseten = "0123456789";
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20
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21 #define STORE_V(y) do {\
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22 out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \
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23 out[x++] = der_ia5_char_encode(baseten[y % 10]); \
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24 } while(0)
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25
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26 #define STORE_V4(y) do {\
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27 out[x++] = der_ia5_char_encode(baseten[(y/1000) % 10]); \
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28 out[x++] = der_ia5_char_encode(baseten[(y/100) % 10]); \
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29 out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \
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30 out[x++] = der_ia5_char_encode(baseten[y % 10]); \
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31 } while(0)
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32
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33 /**
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34 Encodes a Generalized time structure in DER format
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35 @param gtime The GeneralizedTime structure to encode
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36 @param out The destination of the DER encoding of the GeneralizedTime structure
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37 @param outlen [in/out] The length of the DER encoding
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38 @return CRYPT_OK if successful
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39 */
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40 int der_encode_generalizedtime(ltc_generalizedtime *gtime,
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41 unsigned char *out, unsigned long *outlen)
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42 {
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43 unsigned long x, tmplen;
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44 int err;
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45
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46 LTC_ARGCHK(gtime != NULL);
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47 LTC_ARGCHK(out != NULL);
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48 LTC_ARGCHK(outlen != NULL);
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49
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50 if ((err = der_length_generalizedtime(gtime, &tmplen)) != CRYPT_OK) {
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51 return err;
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52 }
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53 if (tmplen > *outlen) {
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54 *outlen = tmplen;
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55 return CRYPT_BUFFER_OVERFLOW;
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56 }
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57
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58 /* store header */
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59 out[0] = 0x18;
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60
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61 /* store values */
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62 x = 2;
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63 STORE_V4(gtime->YYYY);
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64 STORE_V(gtime->MM);
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65 STORE_V(gtime->DD);
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66 STORE_V(gtime->hh);
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67 STORE_V(gtime->mm);
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68 STORE_V(gtime->ss);
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69
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70 if (gtime->fs) {
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71 unsigned long divisor;
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72 unsigned fs = gtime->fs;
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73 unsigned len = 0;
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74 out[x++] = der_ia5_char_encode('.');
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75 divisor = 1;
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76 do {
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77 fs /= 10;
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78 divisor *= 10;
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79 len++;
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80 } while(fs != 0);
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81 while (len-- > 1) {
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82 divisor /= 10;
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83 out[x++] = der_ia5_char_encode(baseten[(gtime->fs/divisor) % 10]);
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84 }
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85 out[x++] = der_ia5_char_encode(baseten[gtime->fs % 10]);
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86 }
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87
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88 if (gtime->off_mm || gtime->off_hh) {
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89 out[x++] = der_ia5_char_encode(gtime->off_dir ? '-' : '+');
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90 STORE_V(gtime->off_hh);
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91 STORE_V(gtime->off_mm);
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92 } else {
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93 out[x++] = der_ia5_char_encode('Z');
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94 }
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95
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96 /* store length */
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97 out[1] = (unsigned char)(x - 2);
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98
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99 /* all good let's return */
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100 *outlen = x;
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101 return CRYPT_OK;
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102 }
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103
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104 #endif
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105
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106 /* ref: $Format:%D$ */
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107 /* git commit: $Format:%H$ */
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108 /* commit time: $Format:%ai$ */