X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fo_time.c;h=75aa2e56a2a6a0dac48734a905c3da8b1431d8c2;hp=e29091d6504c1fab544be3da4ac2fbcf4f74e741;hb=e6c5dbc8e82214f659d5b905d7b4a04a8d1faa8d;hpb=334ef049492368c7eb032d507e571f41a3fed779 diff --git a/crypto/o_time.c b/crypto/o_time.c index e29091d650..75aa2e56a2 100644 --- a/crypto/o_time.c +++ b/crypto/o_time.c @@ -1,6 +1,10 @@ -/* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */ -/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL - * project 2001. +/* + * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project + * 2001. + */ +/* + * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project + * 2008. */ /* ==================================================================== * Copyright (c) 2001 The OpenSSL Project. All rights reserved. @@ -10,7 +14,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in @@ -58,160 +62,318 @@ #include #include -#include "o_time.h" +#include #ifdef OPENSSL_SYS_VMS -# include -# include -# include -# include -# include -# include +# if __CRTL_VER >= 70000000 && \ + (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE) +# define VMS_GMTIME_OK +# endif +# ifndef VMS_GMTIME_OK +# include +# include +# include +# include +# include +# include +# endif /* ndef VMS_GMTIME_OK */ #endif struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result) - { - struct tm *ts = NULL; - -#if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && !defined(__CYGWIN32__) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX) && !defined(OPENSSL_SYS_SUNOS) - /* should return &data, but doesn't on some systems, - so we don't even look at the return value */ - gmtime_r(timer,result); - ts = result; -#elif !defined(OPENSSL_SYS_VMS) - ts = gmtime(timer); - if (ts == NULL) - return NULL; - - memcpy(result, ts, sizeof(struct tm)); - ts = result; +{ + struct tm *ts = NULL; + +#if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX) + /* + * should return &data, but doesn't on some systems, so we don't even + * look at the return value + */ + gmtime_r(timer, result); + ts = result; +#elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK) + ts = gmtime(timer); + if (ts == NULL) + return NULL; + + memcpy(result, ts, sizeof(struct tm)); + ts = result; #endif -#ifdef OPENSSL_SYS_VMS - if (ts == NULL) - { - static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL"); - static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL"); - char logvalue[256]; - unsigned int reslen = 0; - struct { - short buflen; - short code; - void *bufaddr; - unsigned int *reslen; - } itemlist[] = { - { 0, LNM$_STRING, 0, 0 }, - { 0, 0, 0, 0 }, - }; - int status; - time_t t; - - /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */ - itemlist[0].buflen = sizeof(logvalue); - itemlist[0].bufaddr = logvalue; - itemlist[0].reslen = &reslen; - status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist); - if (!(status & 1)) - return NULL; - logvalue[reslen] = '\0'; - - t = *timer; +#if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK) + if (ts == NULL) { + static $DESCRIPTOR(tabnam, "LNM$DCL_LOGICAL"); + static $DESCRIPTOR(lognam, "SYS$TIMEZONE_DIFFERENTIAL"); + char logvalue[256]; + unsigned int reslen = 0; + struct { + short buflen; + short code; + void *bufaddr; + unsigned int *reslen; + } itemlist[] = { + { + 0, LNM$_STRING, 0, 0 + }, + { + 0, 0, 0, 0 + }, + }; + int status; + time_t t; + + /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */ + itemlist[0].buflen = sizeof(logvalue); + itemlist[0].bufaddr = logvalue; + itemlist[0].reslen = &reslen; + status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist); + if (!(status & 1)) + return NULL; + logvalue[reslen] = '\0'; + + t = *timer; /* The following is extracted from the DEC C header time.h */ -/* -** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime -** have two implementations. One implementation is provided -** for compatibility and deals with time in terms of local time, -** the other __utc_* deals with time in terms of UTC. -*/ -/* We use the same conditions as in said time.h to check if we should - assume that t contains local time (and should therefore be adjusted) - or UTC (and should therefore be left untouched). */ -#if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE - /* Get the numerical value of the equivalence string */ - status = atoi(logvalue); - - /* and use it to move time to GMT */ - t -= status; -#endif + /* + ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime + ** have two implementations. One implementation is provided + ** for compatibility and deals with time in terms of local time, + ** the other __utc_* deals with time in terms of UTC. + */ + /* + * We use the same conditions as in said time.h to check if we should + * assume that t contains local time (and should therefore be + * adjusted) or UTC (and should therefore be left untouched). + */ +# if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE + /* Get the numerical value of the equivalence string */ + status = atoi(logvalue); + + /* and use it to move time to GMT */ + t -= status; +# endif + + /* then convert the result to the time structure */ + + /* + * Since there was no gmtime_r() to do this stuff for us, we have to + * do it the hard way. + */ + { + /*- + * The VMS epoch is the astronomical Smithsonian date, + if I remember correctly, which is November 17, 1858. + Furthermore, time is measure in tenths of microseconds + and stored in quadwords (64 bit integers). unix_epoch + below is January 1st 1970 expressed as a VMS time. The + following code was used to get this number: + + #include + #include + #include + #include - /* then convert the result to the time structure */ - - /* Since there was no gmtime_r() to do this stuff for us, - we have to do it the hard way. */ - { - /* The VMS epoch is the astronomical Smithsonian date, - if I remember correctly, which is November 17, 1858. - Furthermore, time is measure in thenths of microseconds - and stored in quadwords (64 bit integers). unix_epoch - below is January 1st 1970 expressed as a VMS time. The - following code was used to get this number: - - #include - #include - #include - #include - - main() - { - unsigned long systime[2]; - unsigned short epoch_values[7] = - { 1970, 1, 1, 0, 0, 0, 0 }; - - lib$cvt_vectim(epoch_values, systime); - - printf("%u %u", systime[0], systime[1]); - } - */ - unsigned long unix_epoch[2] = { 1273708544, 8164711 }; - unsigned long deltatime[2]; - unsigned long systime[2]; - struct vms_vectime - { - short year, month, day, hour, minute, second, - centi_second; - } time_values; - long operation; - - /* Turn the number of seconds since January 1st 1970 to - an internal delta time. - Note that lib$cvt_to_internal_time() will assume - that t is signed, and will therefore break on 32-bit - systems some time in 2038. - */ - operation = LIB$K_DELTA_SECONDS; - status = lib$cvt_to_internal_time(&operation, - &t, deltatime); - - /* Add the delta time with the Unix epoch and we have - the current UTC time in internal format */ - status = lib$add_times(unix_epoch, deltatime, systime); - - /* Turn the internal time into a time vector */ - status = sys$numtim(&time_values, systime); - - /* Fill in the struct tm with the result */ - result->tm_sec = time_values.second; - result->tm_min = time_values.minute; - result->tm_hour = time_values.hour; - result->tm_mday = time_values.day; - result->tm_mon = time_values.month - 1; - result->tm_year = time_values.year - 1900; - - operation = LIB$K_DAY_OF_WEEK; - status = lib$cvt_from_internal_time(&operation, - &result->tm_wday, systime); - result->tm_wday %= 7; - - operation = LIB$K_DAY_OF_YEAR; - status = lib$cvt_from_internal_time(&operation, - &result->tm_yday, systime); - result->tm_yday--; - - result->tm_isdst = 0; /* There's no way to know... */ - - ts = result; - } - } + main() + { + unsigned long systime[2]; + unsigned short epoch_values[7] = + { 1970, 1, 1, 0, 0, 0, 0 }; + + lib$cvt_vectim(epoch_values, systime); + + printf("%u %u", systime[0], systime[1]); + } + */ + unsigned long unix_epoch[2] = { 1273708544, 8164711 }; + unsigned long deltatime[2]; + unsigned long systime[2]; + struct vms_vectime { + short year, month, day, hour, minute, second, centi_second; + } time_values; + long operation; + + /* + * Turn the number of seconds since January 1st 1970 to an + * internal delta time. Note that lib$cvt_to_internal_time() will + * assume that t is signed, and will therefore break on 32-bit + * systems some time in 2038. + */ + operation = LIB$K_DELTA_SECONDS; + status = lib$cvt_to_internal_time(&operation, &t, deltatime); + + /* + * Add the delta time with the Unix epoch and we have the current + * UTC time in internal format + */ + status = lib$add_times(unix_epoch, deltatime, systime); + + /* Turn the internal time into a time vector */ + status = sys$numtim(&time_values, systime); + + /* Fill in the struct tm with the result */ + result->tm_sec = time_values.second; + result->tm_min = time_values.minute; + result->tm_hour = time_values.hour; + result->tm_mday = time_values.day; + result->tm_mon = time_values.month - 1; + result->tm_year = time_values.year - 1900; + + operation = LIB$K_DAY_OF_WEEK; + status = lib$cvt_from_internal_time(&operation, + &result->tm_wday, systime); + result->tm_wday %= 7; + + operation = LIB$K_DAY_OF_YEAR; + status = lib$cvt_from_internal_time(&operation, + &result->tm_yday, systime); + result->tm_yday--; + + result->tm_isdst = 0; /* There's no way to know... */ + + ts = result; + } + } #endif - return ts; - } + return ts; +} + +/* + * Take a tm structure and add an offset to it. This avoids any OS issues + * with restricted date types and overflows which cause the year 2038 + * problem. + */ + +#define SECS_PER_DAY (24 * 60 * 60) + +static long date_to_julian(int y, int m, int d); +static void julian_to_date(long jd, int *y, int *m, int *d); +static int julian_adj(const struct tm *tm, int off_day, long offset_sec, + long *pday, int *psec); + +int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec) +{ + int time_sec, time_year, time_month, time_day; + long time_jd; + + /* Convert time and offset into Julian day and seconds */ + if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec)) + return 0; + + /* Convert Julian day back to date */ + + julian_to_date(time_jd, &time_year, &time_month, &time_day); + + if (time_year < 1900 || time_year > 9999) + return 0; + + /* Update tm structure */ + + tm->tm_year = time_year - 1900; + tm->tm_mon = time_month - 1; + tm->tm_mday = time_day; + + tm->tm_hour = time_sec / 3600; + tm->tm_min = (time_sec / 60) % 60; + tm->tm_sec = time_sec % 60; + + return 1; + +} + +int OPENSSL_gmtime_diff(int *pday, int *psec, + const struct tm *from, const struct tm *to) +{ + int from_sec, to_sec, diff_sec; + long from_jd, to_jd, diff_day; + if (!julian_adj(from, 0, 0, &from_jd, &from_sec)) + return 0; + if (!julian_adj(to, 0, 0, &to_jd, &to_sec)) + return 0; + diff_day = to_jd - from_jd; + diff_sec = to_sec - from_sec; + /* Adjust differences so both positive or both negative */ + if (diff_day > 0 && diff_sec < 0) { + diff_day--; + diff_sec += SECS_PER_DAY; + } + if (diff_day < 0 && diff_sec > 0) { + diff_day++; + diff_sec -= SECS_PER_DAY; + } + + if (pday) + *pday = (int)diff_day; + if (psec) + *psec = diff_sec; + + return 1; + +} + +/* Convert tm structure and offset into julian day and seconds */ +static int julian_adj(const struct tm *tm, int off_day, long offset_sec, + long *pday, int *psec) +{ + int offset_hms, offset_day; + long time_jd; + int time_year, time_month, time_day; + /* split offset into days and day seconds */ + offset_day = offset_sec / SECS_PER_DAY; + /* Avoid sign issues with % operator */ + offset_hms = offset_sec - (offset_day * SECS_PER_DAY); + offset_day += off_day; + /* Add current time seconds to offset */ + offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec; + /* Adjust day seconds if overflow */ + if (offset_hms >= SECS_PER_DAY) { + offset_day++; + offset_hms -= SECS_PER_DAY; + } else if (offset_hms < 0) { + offset_day--; + offset_hms += SECS_PER_DAY; + } + + /* + * Convert date of time structure into a Julian day number. + */ + + time_year = tm->tm_year + 1900; + time_month = tm->tm_mon + 1; + time_day = tm->tm_mday; + + time_jd = date_to_julian(time_year, time_month, time_day); + + /* Work out Julian day of new date */ + time_jd += offset_day; + + if (time_jd < 0) + return 0; + + *pday = time_jd; + *psec = offset_hms; + return 1; +} + +/* + * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm + */ +static long date_to_julian(int y, int m, int d) +{ + return (1461 * (y + 4800 + (m - 14) / 12)) / 4 + + (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 - + (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 + d - 32075; +} + +static void julian_to_date(long jd, int *y, int *m, int *d) +{ + long L = jd + 68569; + long n = (4 * L) / 146097; + long i, j; + + L = L - (146097 * n + 3) / 4; + i = (4000 * (L + 1)) / 1461001; + L = L - (1461 * i) / 4 + 31; + j = (80 * L) / 2447; + *d = L - (2447 * j) / 80; + L = j / 11; + *m = j + 2 - (12 * L); + *y = 100 * (n - 49) + i + L; +}