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diff --git a/common/gettime.h b/common/gettime.h
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+/* gettime.h - Wrapper for time functions
+ * Copyright (C) 2010, 2012 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ *   - the GNU Lesser General Public License as published by the Free
+ *     Software Foundation; either version 3 of the License, or (at
+ *     your option) any later version.
+ *
+ * or
+ *
+ *   - the GNU General Public License as published by the Free
+ *     Software Foundation; either version 2 of the License, or (at
+ *     your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef GNUPG_COMMON_GETTIME_H
+#define GNUPG_COMMON_GETTIME_H
+
+#include <time.h>      /* We need time_t. */
+#include <gpg-error.h> /* We need gpg_error_t. */
+
+
+/* A type to hold the ISO time.  Note that this is the same as
+   the KSBA type ksba_isotime_t. */
+typedef char gnupg_isotime_t[16];
+
+time_t gnupg_get_time (void);
+struct tm *gnupg_gmtime (const time_t *timep, struct tm *result);
+void   gnupg_get_isotime (gnupg_isotime_t timebuf);
+void   gnupg_set_time (time_t newtime, int freeze);
+int    gnupg_faked_time_p (void);
+u32    make_timestamp (void);
+char *elapsed_time_string (time_t since, time_t now);
+
+u32    scan_isodatestr (const char *string);
+int    isotime_p (const char *string);
+int    isotime_human_p (const char *string, int date_only);
+size_t string2isotime (gnupg_isotime_t atime, const char *string);
+time_t isotime2epoch (const char *string);
+void   epoch2isotime (gnupg_isotime_t timebuf, time_t atime);
+int    isodate_human_to_tm (const char *string, struct tm *t);
+time_t parse_timestamp (const char *timestamp, char **endp);
+u32    add_days_to_timestamp (u32 stamp, u16 days);
+const char *strtimevalue (u32 stamp);
+const char *strtimestamp (u32 stamp); /* GMT */
+const char *isotimestamp (u32 stamp); /* GMT */
+const char *asctimestamp (u32 stamp); /* localized */
+char *rfctimestamp (u32 stamp);       /* RFC format, malloced. */
+gpg_error_t add_seconds_to_isotime (gnupg_isotime_t atime, int nseconds);
+gpg_error_t add_days_to_isotime (gnupg_isotime_t atime, int ndays);
+gpg_error_t check_isotime (const gnupg_isotime_t atime);
+void dump_isotime (const gnupg_isotime_t atime);
+void gnupg_copy_time (gnupg_isotime_t d, const gnupg_isotime_t s);
+
+
+#endif /*GNUPG_COMMON_GETTIME_H*/