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337 lines
10 KiB
C
337 lines
10 KiB
C
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1994-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#include "prtypes.h"
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#include "prtime.h"
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#include "secder.h"
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#include "prlong.h"
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#include "secerr.h"
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#define HIDIGIT(v) (((v) / 10) + '0')
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#define LODIGIT(v) (((v) % 10) + '0')
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#define C_SINGLE_QUOTE '\047'
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#define DIGITHI(dig) (((dig) - '0') * 10)
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#define DIGITLO(dig) ((dig) - '0')
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#define ISDIGIT(dig) (((dig) >= '0') && ((dig) <= '9'))
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#define CAPTURE(var,p,label) \
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{ \
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if (!ISDIGIT((p)[0]) || !ISDIGIT((p)[1])) goto label; \
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(var) = ((p)[0] - '0') * 10 + ((p)[1] - '0'); \
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}
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#define SECMIN ((time_t) 60L)
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#define SECHOUR (60L*SECMIN)
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#define SECDAY (24L*SECHOUR)
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#define SECYEAR (365L*SECDAY)
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static long monthToDayInYear[12] = {
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0,
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31,
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31+28,
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31+28+31,
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31+28+31+30,
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31+28+31+30+31,
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31+28+31+30+31+30,
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31+28+31+30+31+30+31,
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31+28+31+30+31+30+31+31,
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31+28+31+30+31+30+31+31+30,
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31+28+31+30+31+30+31+31+30+31,
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31+28+31+30+31+30+31+31+30+31+30,
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};
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/* gmttime must contains UTC time in micro-seconds unit */
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SECStatus
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DER_TimeToUTCTime(SECItem *dst, int64 gmttime)
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{
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PRExplodedTime printableTime;
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unsigned char *d;
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dst->len = 13;
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dst->data = d = (unsigned char*) PORT_Alloc(13);
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dst->type = siBuffer;
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if (!d) {
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return SECFailure;
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}
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/* Convert an int64 time to a printable format. */
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PR_ExplodeTime(gmttime, PR_GMTParameters, &printableTime);
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/* The month in UTC time is base one */
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printableTime.tm_month++;
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/* UTC time does not handle the years before 1950 */
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if (printableTime.tm_year < 1950)
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return SECFailure;
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/* remove the century since it's added to the tm_year by the
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PR_ExplodeTime routine, but is not needed for UTC time */
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printableTime.tm_year %= 100;
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d[0] = HIDIGIT(printableTime.tm_year);
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d[1] = LODIGIT(printableTime.tm_year);
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d[2] = HIDIGIT(printableTime.tm_month);
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d[3] = LODIGIT(printableTime.tm_month);
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d[4] = HIDIGIT(printableTime.tm_mday);
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d[5] = LODIGIT(printableTime.tm_mday);
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d[6] = HIDIGIT(printableTime.tm_hour);
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d[7] = LODIGIT(printableTime.tm_hour);
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d[8] = HIDIGIT(printableTime.tm_min);
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d[9] = LODIGIT(printableTime.tm_min);
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d[10] = HIDIGIT(printableTime.tm_sec);
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d[11] = LODIGIT(printableTime.tm_sec);
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d[12] = 'Z';
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return SECSuccess;
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}
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SECStatus
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DER_AsciiToTime(int64 *dst, char *string)
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{
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long year, month, mday, hour, minute, second, hourOff, minOff, days;
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int64 result, tmp1, tmp2;
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/* Verify time is formatted properly and capture information */
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second = 0;
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hourOff = 0;
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minOff = 0;
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CAPTURE(year,string+0,loser);
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if (year < 50) {
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/* ASSUME that year # is in the 2000's, not the 1900's */
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year += 100;
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}
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CAPTURE(month,string+2,loser);
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if ((month == 0) || (month > 12)) goto loser;
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CAPTURE(mday,string+4,loser);
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if ((mday == 0) || (mday > 31)) goto loser;
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CAPTURE(hour,string+6,loser);
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if (hour > 23) goto loser;
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CAPTURE(minute,string+8,loser);
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if (minute > 59) goto loser;
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if (ISDIGIT(string[10])) {
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CAPTURE(second,string+10,loser);
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if (second > 59) goto loser;
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string += 2;
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}
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if (string[10] == '+') {
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CAPTURE(hourOff,string+11,loser);
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if (hourOff > 23) goto loser;
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CAPTURE(minOff,string+13,loser);
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if (minOff > 59) goto loser;
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} else if (string[10] == '-') {
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CAPTURE(hourOff,string+11,loser);
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if (hourOff > 23) goto loser;
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hourOff = -hourOff;
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CAPTURE(minOff,string+13,loser);
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if (minOff > 59) goto loser;
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minOff = -minOff;
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} else if (string[10] != 'Z') {
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goto loser;
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}
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/* Convert pieces back into a single value year */
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LL_I2L(tmp1, (year-70L));
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LL_I2L(tmp2, SECYEAR);
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LL_MUL(result, tmp1, tmp2);
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LL_I2L(tmp1, ( (mday-1L)*SECDAY + hour*SECHOUR + minute*SECMIN -
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hourOff*SECHOUR - minOff*SECMIN + second ) );
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LL_ADD(result, result, tmp1);
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/*
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** Have to specially handle the day in the month and the year, to
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** take into account leap days. The return time value is in
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** seconds since January 1st, 12:00am 1970, so start examining
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** the time after that. We can't represent a time before that.
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*/
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/* Using two digit years, we can only represent dates from 1970
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to 2069. As a result, we cannot run into the leap year rule
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that states that 1700, 2100, etc. are not leap years (but 2000
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is). In other words, there are no years in the span of time
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that we can represent that are == 0 mod 4 but are not leap
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years. Whew.
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*/
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days = monthToDayInYear[month-1];
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days += (year - 68)/4;
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if (((year % 4) == 0) && (month < 3)) {
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days--;
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}
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LL_I2L(tmp1, (days * SECDAY) );
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LL_ADD(result, result, tmp1 );
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/* convert to micro seconds */
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LL_I2L(tmp1, PR_USEC_PER_SEC);
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LL_MUL(result, result, tmp1);
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*dst = result;
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return SECSuccess;
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loser:
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PORT_SetError(SEC_ERROR_INVALID_TIME);
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return SECFailure;
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}
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SECStatus
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DER_UTCTimeToTime(int64 *dst, SECItem *time)
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{
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return DER_AsciiToTime(dst, (char*) time->data);
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}
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/*
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gmttime must contains UTC time in micro-seconds unit.
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Note: the caller should make sure that Generalized time
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should only be used for certifiate validities after the
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year 2049. Otherwise, UTC time should be used. This routine
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does not check this case, since it can be used to encode
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certificate extension, which does not have this restriction.
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*/
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SECStatus
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DER_TimeToGeneralizedTime(SECItem *dst, int64 gmttime)
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{
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PRExplodedTime printableTime;
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unsigned char *d;
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dst->len = 15;
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dst->data = d = (unsigned char*) PORT_Alloc(15);
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dst->type = siBuffer;
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if (!d) {
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return SECFailure;
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}
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/*Convert a int64 time to a printable format. This is a temporary call
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until we change to NSPR 2.0
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*/
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PR_ExplodeTime(gmttime, PR_GMTParameters, &printableTime);
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/* The month in Generalized time is base one */
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printableTime.tm_month++;
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d[0] = (printableTime.tm_year /1000) + '0';
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d[1] = ((printableTime.tm_year % 1000) / 100) + '0';
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d[2] = ((printableTime.tm_year % 100) / 10) + '0';
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d[3] = (printableTime.tm_year % 10) + '0';
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d[4] = HIDIGIT(printableTime.tm_month);
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d[5] = LODIGIT(printableTime.tm_month);
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d[6] = HIDIGIT(printableTime.tm_mday);
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d[7] = LODIGIT(printableTime.tm_mday);
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d[8] = HIDIGIT(printableTime.tm_hour);
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d[9] = LODIGIT(printableTime.tm_hour);
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d[10] = HIDIGIT(printableTime.tm_min);
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d[11] = LODIGIT(printableTime.tm_min);
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d[12] = HIDIGIT(printableTime.tm_sec);
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d[13] = LODIGIT(printableTime.tm_sec);
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d[14] = 'Z';
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return SECSuccess;
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}
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/*
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The caller should make sure that the generalized time should only
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be used for the certificate validity after the year 2051; otherwise,
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the certificate should be consider invalid!?
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*/
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SECStatus
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DER_GeneralizedTimeToTime(int64 *dst, SECItem *time)
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{
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PRExplodedTime genTime;
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char *string;
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long hourOff, minOff;
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uint16 century;
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string = (char *)time->data;
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PORT_Memset (&genTime, 0, sizeof (genTime));
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/* Verify time is formatted properly and capture information */
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hourOff = 0;
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minOff = 0;
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CAPTURE(century, string+0, loser);
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century *= 100;
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CAPTURE(genTime.tm_year,string+2,loser);
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genTime.tm_year += century;
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CAPTURE(genTime.tm_month,string+4,loser);
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if ((genTime.tm_month == 0) || (genTime.tm_month > 12)) goto loser;
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/* NSPR month base is 0 */
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--genTime.tm_month;
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CAPTURE(genTime.tm_mday,string+6,loser);
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if ((genTime.tm_mday == 0) || (genTime.tm_mday > 31)) goto loser;
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CAPTURE(genTime.tm_hour,string+8,loser);
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if (genTime.tm_hour > 23) goto loser;
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CAPTURE(genTime.tm_min,string+10,loser);
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if (genTime.tm_min > 59) goto loser;
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if (ISDIGIT(string[12])) {
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CAPTURE(genTime.tm_sec,string+12,loser);
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if (genTime.tm_sec > 59) goto loser;
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string += 2;
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}
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if (string[12] == '+') {
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CAPTURE(hourOff,string+13,loser);
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if (hourOff > 23) goto loser;
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CAPTURE(minOff,string+15,loser);
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if (minOff > 59) goto loser;
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} else if (string[12] == '-') {
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CAPTURE(hourOff,string+13,loser);
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if (hourOff > 23) goto loser;
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hourOff = -hourOff;
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CAPTURE(minOff,string+15,loser);
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if (minOff > 59) goto loser;
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minOff = -minOff;
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} else if (string[12] != 'Z') {
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goto loser;
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}
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/* Since the values of hourOff and minOff are small, there will
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be no loss of data by the conversion to int8 */
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/* Convert the GMT offset to seconds and save it it genTime
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for the implode time process */
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genTime.tm_params.tp_gmt_offset = (PRInt32)((hourOff * 60L + minOff) * 60L);
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*dst = PR_ImplodeTime (&genTime);
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return SECSuccess;
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loser:
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PORT_SetError(SEC_ERROR_INVALID_TIME);
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return SECFailure;
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}
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