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-rw-r--r--lib/curl_setup.h18
-rw-r--r--lib/parsedate.c94
2 files changed, 73 insertions, 39 deletions
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index e5a657934..100b8d40f 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -424,6 +424,24 @@
#endif
#define CURL_OFF_T_MIN (-CURL_OFF_T_MAX - CURL_OFF_T_C(1))
+#if (SIZEOF_TIME_T == 4)
+# ifdef HAVE_TIME_T_UNSIGNED
+# define TIME_T_MAX UINT_MAX
+# define TIME_T_MIN 0
+# else
+# define TIME_T_MAX INT_MAX
+# define TIME_T_MIN INT_MIN
+# endif
+#else
+# ifdef HAVE_TIME_T_UNSIGNED
+# define TIME_T_MAX 0xFFFFFFFFFFFFFFFF
+# define TIME_T_MIN 0
+# else
+# define TIME_T_MAX 0x7FFFFFFFFFFFFFFF
+# define TIME_T_MIN -0x10000000000000000
+# endif
+#endif
+
/*
* Arg 2 type for gethostname in case it hasn't been defined in config file.
*/
diff --git a/lib/parsedate.c b/lib/parsedate.c
index 0fabbd269..0dbaf3610 100644
--- a/lib/parsedate.c
+++ b/lib/parsedate.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -276,26 +276,23 @@ struct my_tm {
int tm_hour;
int tm_mday;
int tm_mon;
- int tm_year;
+ int tm_year; /* full year */
};
/* struct tm to time since epoch in GMT time zone.
* This is similar to the standard mktime function but for GMT only, and
* doesn't suffer from the various bugs and portability problems that
* some systems' implementations have.
+ *
+ * Returns 0 on success, otherwise non-zero.
*/
-static time_t my_timegm(struct my_tm *tm)
+static void my_timegm(struct my_tm *tm, time_t *t)
{
static const int month_days_cumulative [12] =
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
int month, year, leap_days;
- if(tm->tm_year < 70)
- /* we don't support years before 1970 as they will cause this function
- to return a negative value */
- return -1;
-
- year = tm->tm_year + 1900;
+ year = tm->tm_year;
month = tm->tm_mon;
if(month < 0) {
year += (11 - month) / 12;
@@ -310,9 +307,9 @@ static time_t my_timegm(struct my_tm *tm)
leap_days = ((leap_days / 4) - (leap_days / 100) + (leap_days / 400)
- (1969 / 4) + (1969 / 100) - (1969 / 400));
- return ((((time_t) (year - 1970) * 365
- + leap_days + month_days_cumulative [month] + tm->tm_mday - 1) * 24
- + tm->tm_hour) * 60 + tm->tm_min) * 60 + tm->tm_sec;
+ *t = ((((time_t) (year - 1970) * 365
+ + leap_days + month_days_cumulative[month] + tm->tm_mday - 1) * 24
+ + tm->tm_hour) * 60 + tm->tm_min) * 60 + tm->tm_sec;
}
/*
@@ -462,7 +459,7 @@ static int parsedate(const char *date, time_t *output)
if(!found && (dignext == DATE_YEAR) && (yearnum == -1)) {
yearnum = val;
found = TRUE;
- if(yearnum < 1900) {
+ if(yearnum < 100) {
if(yearnum > 70)
yearnum += 1900;
else
@@ -491,18 +488,39 @@ static int parsedate(const char *date, time_t *output)
/* lacks vital info, fail */
return PARSEDATE_FAIL;
-#if SIZEOF_TIME_T < 5
- /* 32 bit time_t can only hold dates to the beginning of 2038 */
- if(yearnum > 2037) {
- *output = 0x7fffffff;
- return PARSEDATE_LATER;
+#ifdef HAVE_TIME_T_UNSIGNED
+ if(yearnum < 1970) {
+ /* only positive numbers cannot return earlier */
+ *output = TIME_T_MIN;
+ return PARSEDATE_SOONER;
}
#endif
- if(yearnum < 1970) {
- *output = 0;
+#if (SIZEOF_TIME_T < 5)
+
+#if HAVE_TIME_T_UNSIGNED
+ /* an unsigned 32 bit time_t can only hold dates to 2106 */
+ if(yearnum > 2105) {
+ *output = TIME_T_MAX;
+ return PARSEDATE_LATER;
+ }
+#else
+ /* a signed 32 bit time_t can only hold dates to the beginning of 2038 */
+ if(yearnum > 2037) {
+ *output = TIME_T_MAX;
+ return PARSEDATE_LATER;
+ }
+ if(yearnum < 1903) {
+ *output = TIME_T_MIN;
return PARSEDATE_SOONER;
}
+#endif
+
+#else
+ /* The Gregorian calendar was introduced 1582 */
+ if(yearnum < 1583)
+ return PARSEDATE_FAIL;
+#endif
if((mdaynum > 31) || (monnum > 11) ||
(hournum > 23) || (minnum > 59) || (secnum > 60))
@@ -513,31 +531,25 @@ static int parsedate(const char *date, time_t *output)
tm.tm_hour = hournum;
tm.tm_mday = mdaynum;
tm.tm_mon = monnum;
- tm.tm_year = yearnum - 1900;
-
- /* my_timegm() returns a time_t. time_t is often 32 bits, even on many
- architectures that feature 64 bit 'long'.
+ tm.tm_year = yearnum;
- Some systems have 64 bit time_t and deal with years beyond 2038. However,
- even on some of the systems with 64 bit time_t mktime() returns -1 for
- dates beyond 03:14:07 UTC, January 19, 2038. (Such as AIX 5100-06)
+ /* my_timegm() returns a time_t. time_t is often 32 bits, sometimes even on
+ architectures that feature 64 bit 'long' but ultimately time_t is the
+ correct data type to use.
*/
- t = my_timegm(&tm);
-
- /* time zone adjust (cast t to int to compare to negative one) */
- if(-1 != (int)t) {
+ my_timegm(&tm, &t);
- /* Add the time zone diff between local time zone and GMT. */
- long delta = (long)(tzoff!=-1?tzoff:0);
+ /* Add the time zone diff between local time zone and GMT. */
+ if(tzoff == -1)
+ tzoff = 0;
- if((delta>0) && (t > LONG_MAX - delta)) {
- *output = 0x7fffffff;
- return PARSEDATE_LATER; /* time_t overflow */
- }
-
- t += delta;
+ if((tzoff > 0) && (t > TIME_T_MAX - tzoff)) {
+ *output = TIME_T_MAX;
+ return PARSEDATE_LATER; /* time_t overflow */
}
+ t += tzoff;
+
*output = t;
return PARSEDATE_OK;
@@ -551,6 +563,10 @@ time_t curl_getdate(const char *p, const time_t *now)
switch(rc) {
case PARSEDATE_OK:
+ if(parsed == -1)
+ /* avoid returning -1 for a working scenario */
+ parsed++;
+ /* fallthrough */
case PARSEDATE_LATER:
case PARSEDATE_SOONER:
return parsed;