diff options
Diffstat (limited to 'security/nss/lib/util/dertime.c')
| -rw-r--r-- | security/nss/lib/util/dertime.c | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/security/nss/lib/util/dertime.c b/security/nss/lib/util/dertime.c new file mode 100644 index 000000000..f58fc18b4 --- /dev/null +++ b/security/nss/lib/util/dertime.c @@ -0,0 +1,310 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "prtypes.h" +#include "prtime.h" +#include "secder.h" +#include "prlong.h" +#include "secerr.h" + +#define HIDIGIT(v) (((v) / 10) + '0') +#define LODIGIT(v) (((v) % 10) + '0') + +#define ISDIGIT(dig) (((dig) >= '0') && ((dig) <= '9')) +#define CAPTURE(var, p, label) \ + { \ + if (!ISDIGIT((p)[0]) || !ISDIGIT((p)[1])) \ + goto label; \ + (var) = ((p)[0] - '0') * 10 + ((p)[1] - '0'); \ + p += 2; \ + } + +static const PRTime January1st1 = PR_INT64(0xff23400100d44000); +static const PRTime January1st1950 = PR_INT64(0xfffdc1f8793da000); +static const PRTime January1st2050 = PR_INT64(0x0008f81e1b098000); +static const PRTime January1st10000 = PR_INT64(0x0384440ccc736000); + +/* gmttime must contains UTC time in micro-seconds unit */ +SECStatus +DER_TimeToUTCTimeArena(PLArenaPool *arenaOpt, SECItem *dst, PRTime gmttime) +{ + PRExplodedTime printableTime; + unsigned char *d; + + if ((gmttime < January1st1950) || (gmttime >= January1st2050)) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return SECFailure; + } + + dst->len = 13; + if (arenaOpt) { + dst->data = d = (unsigned char *)PORT_ArenaAlloc(arenaOpt, dst->len); + } else { + dst->data = d = (unsigned char *)PORT_Alloc(dst->len); + } + dst->type = siUTCTime; + if (!d) { + return SECFailure; + } + + /* Convert a PRTime to a printable format. */ + PR_ExplodeTime(gmttime, PR_GMTParameters, &printableTime); + + /* The month in UTC time is base one */ + printableTime.tm_month++; + + /* remove the century since it's added to the tm_year by the + PR_ExplodeTime routine, but is not needed for UTC time */ + printableTime.tm_year %= 100; + + d[0] = HIDIGIT(printableTime.tm_year); + d[1] = LODIGIT(printableTime.tm_year); + d[2] = HIDIGIT(printableTime.tm_month); + d[3] = LODIGIT(printableTime.tm_month); + d[4] = HIDIGIT(printableTime.tm_mday); + d[5] = LODIGIT(printableTime.tm_mday); + d[6] = HIDIGIT(printableTime.tm_hour); + d[7] = LODIGIT(printableTime.tm_hour); + d[8] = HIDIGIT(printableTime.tm_min); + d[9] = LODIGIT(printableTime.tm_min); + d[10] = HIDIGIT(printableTime.tm_sec); + d[11] = LODIGIT(printableTime.tm_sec); + d[12] = 'Z'; + return SECSuccess; +} + +SECStatus +DER_TimeToUTCTime(SECItem *dst, PRTime gmttime) +{ + return DER_TimeToUTCTimeArena(NULL, dst, gmttime); +} + +static SECStatus /* forward */ + der_TimeStringToTime(PRTime *dst, const char *string, int generalized, + const char **endptr); + +#define GEN_STRING 2 /* TimeString is a GeneralizedTime */ +#define UTC_STRING 0 /* TimeString is a UTCTime */ + +/* The caller of DER_AsciiToItem MUST ENSURE that either +** a) "string" points to a null-terminated ASCII string, or +** b) "string" points to a buffer containing a valid UTCTime, +** whether null terminated or not, or +** c) "string" contains at least 19 characters, with or without null char. +** otherwise, this function may UMR and/or crash. +** It suffices to ensure that the input "string" is at least 17 bytes long. +*/ +SECStatus +DER_AsciiToTime(PRTime *dst, const char *string) +{ + return der_TimeStringToTime(dst, string, UTC_STRING, NULL); +} + +SECStatus +DER_UTCTimeToTime(PRTime *dst, const SECItem *time) +{ + /* Minimum valid UTCTime is yymmddhhmmZ which is 11 bytes. + ** Maximum valid UTCTime is yymmddhhmmss+0000 which is 17 bytes. + ** 20 should be large enough for all valid encoded times. + */ + unsigned int i; + char localBuf[20]; + const char *end = NULL; + SECStatus rv; + + if (!time || !time->data || time->len < 11 || time->len > 17) { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + + for (i = 0; i < time->len; i++) { + if (time->data[i] == '\0') { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + localBuf[i] = time->data[i]; + } + localBuf[i] = '\0'; + + rv = der_TimeStringToTime(dst, localBuf, UTC_STRING, &end); + if (rv == SECSuccess && *end != '\0') { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + return rv; +} + +/* + gmttime must contains UTC time in micro-seconds unit. + Note: the caller should make sure that Generalized time + should only be used for certifiate validities after the + year 2049. Otherwise, UTC time should be used. This routine + does not check this case, since it can be used to encode + certificate extension, which does not have this restriction. + */ +SECStatus +DER_TimeToGeneralizedTimeArena(PLArenaPool *arenaOpt, SECItem *dst, PRTime gmttime) +{ + PRExplodedTime printableTime; + unsigned char *d; + + if ((gmttime < January1st1) || (gmttime >= January1st10000)) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return SECFailure; + } + dst->len = 15; + if (arenaOpt) { + dst->data = d = (unsigned char *)PORT_ArenaAlloc(arenaOpt, dst->len); + } else { + dst->data = d = (unsigned char *)PORT_Alloc(dst->len); + } + dst->type = siGeneralizedTime; + if (!d) { + return SECFailure; + } + + /* Convert a PRTime to a printable format. */ + PR_ExplodeTime(gmttime, PR_GMTParameters, &printableTime); + + /* The month in Generalized time is base one */ + printableTime.tm_month++; + + d[0] = (printableTime.tm_year / 1000) + '0'; + d[1] = ((printableTime.tm_year % 1000) / 100) + '0'; + d[2] = ((printableTime.tm_year % 100) / 10) + '0'; + d[3] = (printableTime.tm_year % 10) + '0'; + d[4] = HIDIGIT(printableTime.tm_month); + d[5] = LODIGIT(printableTime.tm_month); + d[6] = HIDIGIT(printableTime.tm_mday); + d[7] = LODIGIT(printableTime.tm_mday); + d[8] = HIDIGIT(printableTime.tm_hour); + d[9] = LODIGIT(printableTime.tm_hour); + d[10] = HIDIGIT(printableTime.tm_min); + d[11] = LODIGIT(printableTime.tm_min); + d[12] = HIDIGIT(printableTime.tm_sec); + d[13] = LODIGIT(printableTime.tm_sec); + d[14] = 'Z'; + return SECSuccess; +} + +SECStatus +DER_TimeToGeneralizedTime(SECItem *dst, PRTime gmttime) +{ + return DER_TimeToGeneralizedTimeArena(NULL, dst, gmttime); +} + +SECStatus +DER_GeneralizedTimeToTime(PRTime *dst, const SECItem *time) +{ + /* Minimum valid GeneralizedTime is ccyymmddhhmmZ which is 13 bytes. + ** Maximum valid GeneralizedTime is ccyymmddhhmmss+0000 which is 19 bytes. + ** 20 should be large enough for all valid encoded times. + */ + unsigned int i; + char localBuf[20]; + const char *end = NULL; + SECStatus rv; + + if (!time || !time->data || time->len < 13 || time->len > 19) { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + + for (i = 0; i < time->len; i++) { + if (time->data[i] == '\0') { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + localBuf[i] = time->data[i]; + } + localBuf[i] = '\0'; + + rv = der_TimeStringToTime(dst, localBuf, GEN_STRING, &end); + if (rv == SECSuccess && *end != '\0') { + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; + } + return rv; +} + +static SECStatus +der_TimeStringToTime(PRTime *dst, const char *string, int generalized, + const char **endptr) +{ + PRExplodedTime genTime; + long hourOff = 0, minOff = 0; + PRUint16 century; + char signum; + + if (string == NULL || dst == NULL) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return SECFailure; + } + + /* Verify time is formatted properly and capture information */ + memset(&genTime, 0, sizeof genTime); + + if (generalized == UTC_STRING) { + CAPTURE(genTime.tm_year, string, loser); + century = (genTime.tm_year < 50) ? 20 : 19; + } else { + CAPTURE(century, string, loser); + CAPTURE(genTime.tm_year, string, loser); + } + genTime.tm_year += century * 100; + + CAPTURE(genTime.tm_month, string, loser); + if ((genTime.tm_month == 0) || (genTime.tm_month > 12)) + goto loser; + + /* NSPR month base is 0 */ + --genTime.tm_month; + + CAPTURE(genTime.tm_mday, string, loser); + if ((genTime.tm_mday == 0) || (genTime.tm_mday > 31)) + goto loser; + + CAPTURE(genTime.tm_hour, string, loser); + if (genTime.tm_hour > 23) + goto loser; + + CAPTURE(genTime.tm_min, string, loser); + if (genTime.tm_min > 59) + goto loser; + + if (ISDIGIT(string[0])) { + CAPTURE(genTime.tm_sec, string, loser); + if (genTime.tm_sec > 59) + goto loser; + } + signum = *string++; + if (signum == '+' || signum == '-') { + CAPTURE(hourOff, string, loser); + if (hourOff > 23) + goto loser; + CAPTURE(minOff, string, loser); + if (minOff > 59) + goto loser; + if (signum == '-') { + hourOff = -hourOff; + minOff = -minOff; + } + } else if (signum != 'Z') { + goto loser; + } + + if (endptr) + *endptr = string; + + /* Convert the GMT offset to seconds and save it in genTime + * for the implode time call. + */ + genTime.tm_params.tp_gmt_offset = (PRInt32)((hourOff * 60L + minOff) * 60L); + *dst = PR_ImplodeTime(&genTime); + return SECSuccess; + +loser: + PORT_SetError(SEC_ERROR_INVALID_TIME); + return SECFailure; +} |