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annotate libtomcrypt/src/pk/asn1/der/generalizedtime/der_encode_generalizedtime.c @ 1629:258b57b208ae

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Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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_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: $Format:%ai$ */