From 71bc79caab7f9510151b31846755cc4db7b81ec0 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Tue, 2 Jan 2007 10:59:38 +0000
Subject: [PATCH] r20462: add functions to handle UTCTime strings

metze
(This used to be commit 49c7da812c290e23bb65b98a2710fb90c4a0ece2)
---
 source4/lib/ldb/common/ldb_msg.c | 59 ++++++++++++++++++++++++++++++--
 source4/lib/ldb/include/ldb.h    | 36 ++++++++++++++++---
 2 files changed, 87 insertions(+), 8 deletions(-)

diff --git a/source4/lib/ldb/common/ldb_msg.c b/source4/lib/ldb/common/ldb_msg.c
index 9efd3d4d52..bed3647d3a 100644
--- a/source4/lib/ldb/common/ldb_msg.c
+++ b/source4/lib/ldb/common/ldb_msg.c
@@ -757,7 +757,7 @@ void ldb_msg_remove_element(struct ldb_message *msg, struct ldb_message_element
 }
 
 /*
-  return a LDAP formatted time string
+  return a LDAP formatted GeneralizedTime string
 */
 char *ldb_timestring(TALLOC_CTX *mem_ctx, time_t t)
 {
@@ -787,9 +787,8 @@ char *ldb_timestring(TALLOC_CTX *mem_ctx, time_t t)
 	return ts;
 }
 
-
 /*
-  convert a LDAP time string to a time_t. Return 0 if unable to convert
+  convert a LDAP GeneralizedTime string to a time_t. Return 0 if unable to convert
 */
 time_t ldb_string_to_time(const char *s)
 {
@@ -809,6 +808,60 @@ time_t ldb_string_to_time(const char *s)
 	return timegm(&tm);
 }
 
+/*
+  return a LDAP formatted UTCTime string
+*/
+char *ldb_timestring_utc(TALLOC_CTX *mem_ctx, time_t t)
+{
+	struct tm *tm = gmtime(&t);
+	char *ts;
+	int r;
+
+	if (!tm) {
+		return NULL;
+	}
+
+	/* we now excatly how long this string will be */
+	ts = talloc_array(mem_ctx, char, 14);
+
+	/* formatted like: 20040408072012.0Z => 040408072012Z */
+	r = snprintf(ts, 14,
+			"%02u%02u%02u%02u%02u%02uZ",
+			(tm->tm_year+1900)%100, tm->tm_mon+1,
+			tm->tm_mday, tm->tm_hour, tm->tm_min,
+			tm->tm_sec);
+
+	if (r != 13) {
+		talloc_free(ts);
+		return NULL;
+	}
+
+	return ts;
+}
+
+/*
+  convert a LDAP UTCTime string to a time_t. Return 0 if unable to convert
+*/
+time_t ldb_string_utc_to_time(const char *s)
+{
+	struct tm tm;
+	
+	if (s == NULL) return 0;
+	
+	memset(&tm, 0, sizeof(tm));
+	if (sscanf(s, "%02u%02u%02u%02u%02u%02u", 
+		   &tm.tm_year, &tm.tm_mon, &tm.tm_mday, 
+		   &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
+		return 0;
+	}
+	if (tm.tm_year < 50) {
+		tm.tm_year += 100;
+	}
+	tm.tm_mon -= 1;
+	
+	return timegm(&tm);
+}
+
 
 /*
   dump a set of results to a file. Useful from within gdb
diff --git a/source4/lib/ldb/include/ldb.h b/source4/lib/ldb/include/ldb.h
index 1e2a6b0bbd..4f8ee1f941 100644
--- a/source4/lib/ldb/include/ldb.h
+++ b/source4/lib/ldb/include/ldb.h
@@ -1550,9 +1550,9 @@ void ldb_msg_remove_attr(struct ldb_message *msg, const char *attr);
 /**
    Convert a time structure to a string
 
-   This function converts a time_t structure to an LDAP formatted time
-   string.
-
+   This function converts a time_t structure to an LDAP formatted
+   GeneralizedTime string.
+		
    \param mem_ctx the memory context to allocate the return string in
    \param t the time structure to convert
 
@@ -1564,8 +1564,8 @@ char *ldb_timestring(void *mem_ctx, time_t t);
 /**
    Convert a string to a time structure
 
-   This function converts an LDAP formatted time string to a time_t
-   structure.
+   This function converts an LDAP formatted GeneralizedTime string
+   to a time_t structure.
 
    \param s the string to convert
 
@@ -1573,6 +1573,32 @@ char *ldb_timestring(void *mem_ctx, time_t t);
 */
 time_t ldb_string_to_time(const char *s);
 
+/**
+   Convert a time structure to a string
+
+   This function converts a time_t structure to an LDAP formatted
+   UTCTime string.
+		
+   \param mem_ctx the memory context to allocate the return string in
+   \param t the time structure to convert
+
+   \return the formatted string, or NULL if the time structure could
+   not be converted
+*/
+char *ldb_timestring_utc(void *mem_ctx, time_t t);
+
+/**
+   Convert a string to a time structure
+
+   This function converts an LDAP formatted UTCTime string
+   to a time_t structure.
+
+   \param s the string to convert
+
+   \return the time structure, or 0 if the string cannot be converted
+*/
+time_t ldb_string_utc_to_time(const char *s);
+
 
 void ldb_qsort (void *const pbase, size_t total_elems, size_t size, void *opaque, ldb_qsort_cmp_fn_t cmp);
 #endif
-- 
2.34.1