Parse commit time as uint64_t to avoid overflow

The commit time is already stored as a git_time_t, but we were
parsing is as a uint32_t.  This just switches the parser to use
uint64_t which will handle dates further in the future (and adds
some tests of those future dates).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/signature.c b/src/signature.c
index d77655315..3380097ff 100644
--- a/src/signature.c
+++ b/src/signature.c
@@ -241,15 +241,15 @@ static const char *scan_for_previous_token(const char *buffer, const char *left_
 
 static int parse_time(git_time_t *time_out, const char *buffer)
 {
-	int time;
 	int error;
+	int64_t time;
 
 	if (*buffer == '+' || *buffer == '-') {
 		giterr_set(GITERR_INVALID, "Failed while parsing time. '%s' actually looks like a timezone offset.", buffer);
 		return -1;
 	}
 
-	error = git__strtol32(&time, buffer, &buffer, 10);
+	error = git__strtol64(&time, buffer, &buffer, 10);
 
 	if (!error)
 		*time_out = (git_time_t)time;