dertime.c
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上传日期:2007-01-12
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文件大小:10k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- #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 C_SINGLE_QUOTE ' 47'
- #define DIGITHI(dig) (((dig) - '0') * 10)
- #define DIGITLO(dig) ((dig) - '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');
- }
- #define SECMIN ((time_t) 60L)
- #define SECHOUR (60L*SECMIN)
- #define SECDAY (24L*SECHOUR)
- #define SECYEAR (365L*SECDAY)
- static long monthToDayInYear[12] = {
- 0,
- 31,
- 31+28,
- 31+28+31,
- 31+28+31+30,
- 31+28+31+30+31,
- 31+28+31+30+31+30,
- 31+28+31+30+31+30+31,
- 31+28+31+30+31+30+31+31,
- 31+28+31+30+31+30+31+31+30,
- 31+28+31+30+31+30+31+31+30+31,
- 31+28+31+30+31+30+31+31+30+31+30,
- };
- /* gmttime must contains UTC time in micro-seconds unit */
- SECStatus
- DER_TimeToUTCTime(SECItem *dst, int64 gmttime)
- {
- PRExplodedTime printableTime;
- unsigned char *d;
- dst->len = 13;
- dst->data = d = (unsigned char*) PORT_Alloc(13);
- if (!d) {
- return SECFailure;
- }
- /* Convert an int64 time to a printable format. */
- PR_ExplodeTime(gmttime, PR_GMTParameters, &printableTime);
- /* The month in UTC time is base one */
- printableTime.tm_month++;
- /* UTC time does not handle the years before 1950 */
- if (printableTime.tm_year < 1950)
- return SECFailure;
- /* 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_AsciiToTime(int64 *dst, char *string)
- {
- long year, month, mday, hour, minute, second, hourOff, minOff, days;
- int64 result, tmp1, tmp2;
-
- /* Verify time is formatted properly and capture information */
- second = 0;
- hourOff = 0;
- minOff = 0;
- CAPTURE(year,string+0,loser);
- if (year < 50) {
- /* ASSUME that year # is in the 2000's, not the 1900's */
- year += 100;
- }
- CAPTURE(month,string+2,loser);
- if ((month == 0) || (month > 12)) goto loser;
- CAPTURE(mday,string+4,loser);
- if ((mday == 0) || (mday > 31)) goto loser;
- CAPTURE(hour,string+6,loser);
- if (hour > 23) goto loser;
- CAPTURE(minute,string+8,loser);
- if (minute > 59) goto loser;
- if (ISDIGIT(string[10])) {
- CAPTURE(second,string+10,loser);
- if (second > 59) goto loser;
- string += 2;
- }
- if (string[10] == '+') {
- CAPTURE(hourOff,string+11,loser);
- if (hourOff > 23) goto loser;
- CAPTURE(minOff,string+13,loser);
- if (minOff > 59) goto loser;
- } else if (string[10] == '-') {
- CAPTURE(hourOff,string+11,loser);
- if (hourOff > 23) goto loser;
- hourOff = -hourOff;
- CAPTURE(minOff,string+13,loser);
- if (minOff > 59) goto loser;
- minOff = -minOff;
- } else if (string[10] != 'Z') {
- goto loser;
- }
-
-
- /* Convert pieces back into a single value year */
- LL_I2L(tmp1, (year-70L));
- LL_I2L(tmp2, SECYEAR);
- LL_MUL(result, tmp1, tmp2);
-
- LL_I2L(tmp1, ( (mday-1L)*SECDAY + hour*SECHOUR + minute*SECMIN -
- hourOff*SECHOUR - minOff*SECMIN + second ) );
- LL_ADD(result, result, tmp1);
- /*
- ** Have to specially handle the day in the month and the year, to
- ** take into account leap days. The return time value is in
- ** seconds since January 1st, 12:00am 1970, so start examining
- ** the time after that. We can't represent a time before that.
- */
- /* Using two digit years, we can only represent dates from 1970
- to 2069. As a result, we cannot run into the leap year rule
- that states that 1700, 2100, etc. are not leap years (but 2000
- is). In other words, there are no years in the span of time
- that we can represent that are == 0 mod 4 but are not leap
- years. Whew.
- */
- days = monthToDayInYear[month-1];
- days += (year - 68)/4;
- if (((year % 4) == 0) && (month < 3)) {
- days--;
- }
-
- LL_I2L(tmp1, (days * SECDAY) );
- LL_ADD(result, result, tmp1 );
- /* convert to micro seconds */
- LL_I2L(tmp1, PR_USEC_PER_SEC);
- LL_MUL(result, result, tmp1);
- *dst = result;
- return SECSuccess;
- loser:
- PORT_SetError(SEC_ERROR_INVALID_TIME);
- return SECFailure;
-
- }
- SECStatus
- DER_UTCTimeToTime(int64 *dst, SECItem *time)
- {
- return DER_AsciiToTime(dst, (char*) time->data);
- }
- /*
- 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_TimeToGeneralizedTime(SECItem *dst, int64 gmttime)
- {
- PRExplodedTime printableTime;
- unsigned char *d;
- dst->len = 15;
- dst->data = d = (unsigned char*) PORT_Alloc(15);
- if (!d) {
- return SECFailure;
- }
- /*Convert a int64 time to a printable format. This is a temporary call
- until we change to NSPR 2.0
- */
- 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;
- }
- /*
- The caller should make sure that the generalized time should only
- be used for the certificate validity after the year 2051; otherwise,
- the certificate should be consider invalid!?
- */
- SECStatus
- DER_GeneralizedTimeToTime(int64 *dst, SECItem *time)
- {
- PRExplodedTime genTime;
- char *string;
- long hourOff, minOff;
- uint16 century;
- string = (char *)time->data;
- PORT_Memset (&genTime, 0, sizeof (genTime));
- /* Verify time is formatted properly and capture information */
- hourOff = 0;
- minOff = 0;
- CAPTURE(century, string+0, loser);
- century *= 100;
- CAPTURE(genTime.tm_year,string+2,loser);
- genTime.tm_year += century;
- CAPTURE(genTime.tm_month,string+4,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+6,loser);
- if ((genTime.tm_mday == 0) || (genTime.tm_mday > 31)) goto loser;
-
- CAPTURE(genTime.tm_hour,string+8,loser);
- if (genTime.tm_hour > 23) goto loser;
-
- CAPTURE(genTime.tm_min,string+10,loser);
- if (genTime.tm_min > 59) goto loser;
-
- if (ISDIGIT(string[12])) {
- CAPTURE(genTime.tm_sec,string+12,loser);
- if (genTime.tm_sec > 59) goto loser;
- string += 2;
- }
- if (string[12] == '+') {
- CAPTURE(hourOff,string+13,loser);
- if (hourOff > 23) goto loser;
- CAPTURE(minOff,string+15,loser);
- if (minOff > 59) goto loser;
- } else if (string[12] == '-') {
- CAPTURE(hourOff,string+13,loser);
- if (hourOff > 23) goto loser;
- hourOff = -hourOff;
- CAPTURE(minOff,string+15,loser);
- if (minOff > 59) goto loser;
- minOff = -minOff;
- } else if (string[12] != 'Z') {
- goto loser;
- }
- /* Since the values of hourOff and minOff are small, there will
- be no loss of data by the conversion to int8 */
- /* Convert the GMT offset to seconds and save it it genTime
- for the implode time process */
- 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;
-
- }