projects / apple / security.git / blame
| Commit | Line | Data |
|---|---|---|
| 29654253 A |
1 | #include "timeStr.h" |
| 2 | #include <string.h> | |
| 3 | #include <stdlib.h> | |
| 4 | #include <stdio.h> | |
| 5 | #include <ctype.h> | |
| 6 | ||
| 7 | /* | |
| 8 | * Given a string containing either a UTC-style or "generalized time" | |
| 9 | * time string, convert to a struct tm (in GMT/UTC). Returns nonzero on | |
| 10 | * error. | |
| 11 | */ | |
| 12 | int appTimeStringToTm( | |
| 13 | const char *str, | |
| 14 | unsigned len, | |
| 15 | struct tm *tmp) | |
| 16 | { | |
| 17 | char szTemp[5]; | |
| 18 | unsigned isUtc; | |
| 19 | unsigned x; | |
| 20 | unsigned i; | |
| 21 | char *cp; | |
| 22 | ||
| 23 | if((str == NULL) || (len == 0) || (tmp == NULL)) { | |
| 24 | return 1; | |
| 25 | } | |
| 26 | ||
| 27 | /* tolerate NULL terminated or not */ | |
| 28 | if(str[len - 1] == '\0') { | |
| 29 | len--; | |
| 30 | } | |
| 31 | switch(len) { | |
| 32 | case UTC_TIME_STRLEN: // 2-digit year, not Y2K compliant | |
| 33 | isUtc = 1; | |
| 34 | break; | |
| 35 | case GENERALIZED_TIME_STRLEN: // 4-digit year | |
| 36 | isUtc = 0; | |
| 37 | break; | |
| 38 | default: // unknown format | |
| 39 | return 1; | |
| 40 | } | |
| 41 | ||
| 42 | cp = (char *)str; | |
| 43 | ||
| 44 | /* check that all characters except last are digits */ | |
| 45 | for(i=0; i<(len - 1); i++) { | |
| 46 | if ( !(isdigit(cp[i])) ) { | |
| 47 | return 1; | |
| 48 | } | |
| 49 | } | |
| 50 | ||
| 51 | /* check last character is a 'Z' */ | |
| 52 | if(cp[len - 1] != 'Z' ) { | |
| 53 | return 1; | |
| 54 | } | |
| 55 | ||
| 56 | /* YEAR */ | |
| 57 | szTemp[0] = *cp++; | |
| 58 | szTemp[1] = *cp++; | |
| 59 | if(!isUtc) { | |
| 60 | /* two more digits */ | |
| 61 | szTemp[2] = *cp++; | |
| 62 | szTemp[3] = *cp++; | |
| 63 | szTemp[4] = '\0'; | |
| 64 | } | |
| 65 | else { | |
| 66 | szTemp[2] = '\0'; | |
| 67 | } | |
| 68 | x = atoi( szTemp ); | |
| 69 | if(isUtc) { | |
| 70 | /* | |
| 71 | * 2-digit year. | |
| 72 | * 0 <= year < 50 : assume century 21 | |
| 73 | * 50 <= year < 70 : illegal per PKIX | |
| 74 | * 70 < year <= 99 : assume century 20 | |
| 75 | */ | |
| 76 | if(x < 50) { | |
| 77 | x += 2000; | |
| 78 | } | |
| 79 | else if(x < 70) { | |
| 80 | return 1; | |
| 81 | } | |
| 82 | else { | |
| 83 | /* century 20 */ | |
| 84 | x += 1900; | |
| 85 | } | |
| 86 | } | |
| 87 | /* by definition - tm_year is year - 1900 */ | |
| 88 | tmp->tm_year = x - 1900; | |
| 89 | ||
| 90 | /* MONTH */ | |
| 91 | szTemp[0] = *cp++; | |
| 92 | szTemp[1] = *cp++; | |
| 93 | szTemp[2] = '\0'; | |
| 94 | x = atoi( szTemp ); | |
| 95 | /* in the string, months are from 1 to 12 */ | |
| 96 | if((x > 12) || (x <= 0)) { | |
| 97 | return 1; | |
| 98 | } | |
| 99 | /* in a tm, 0 to 11 */ | |
| 100 | tmp->tm_mon = x - 1; | |
| 101 | ||
| 102 | /* DAY */ | |
| 103 | szTemp[0] = *cp++; | |
| 104 | szTemp[1] = *cp++; | |
| 105 | szTemp[2] = '\0'; | |
| 106 | x = atoi( szTemp ); | |
| 107 | /* 1..31 in both formats */ | |
| 108 | if((x > 31) || (x <= 0)) { | |
| 109 | return 1; | |
| 110 | } | |
| 111 | tmp->tm_mday = x; | |
| 112 | ||
| 113 | /* HOUR */ | |
| 114 | szTemp[0] = *cp++; | |
| 115 | szTemp[1] = *cp++; | |
| 116 | szTemp[2] = '\0'; | |
| 117 | x = atoi( szTemp ); | |
| 118 | if((x > 23) || (x < 0)) { | |
| 119 | return 1; | |
| 120 | } | |
| 121 | tmp->tm_hour = x; | |
| 122 | ||
| 123 | /* MINUTE */ | |
| 124 | szTemp[0] = *cp++; | |
| 125 | szTemp[1] = *cp++; | |
| 126 | szTemp[2] = '\0'; | |
| 127 | x = atoi( szTemp ); | |
| 128 | if((x > 59) || (x < 0)) { | |
| 129 | return 1; | |
| 130 | } | |
| 131 | tmp->tm_min = x; | |
| 132 | ||
| 133 | /* SECOND */ | |
| 134 | szTemp[0] = *cp++; | |
| 135 | szTemp[1] = *cp++; | |
| 136 | szTemp[2] = '\0'; | |
| 137 | x = atoi( szTemp ); | |
| 138 | if((x > 59) || (x < 0)) { | |
| 139 | return 1; | |
| 140 | } | |
| 141 | tmp->tm_sec = x; | |
| 142 | return 0; | |
| 143 | } | |
| 144 |