--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nss/lib/util/sectime.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,161 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prtime.h"
+#include "secder.h"
+#include "secitem.h"
+#include "secerr.h"
+
+static char *DecodeUTCTime2FormattedAscii (SECItem *utcTimeDER, char *format);
+static char *DecodeGeneralizedTime2FormattedAscii (SECItem *generalizedTimeDER, char *format);
+
+/* convert DER utc time to ascii time string */
+char *
+DER_UTCTimeToAscii(SECItem *utcTime)
+{
+    return (DecodeUTCTime2FormattedAscii (utcTime, "%a %b %d %H:%M:%S %Y"));
+}
+
+/* convert DER utc time to ascii time string, only include day, not time */
+char *
+DER_UTCDayToAscii(SECItem *utctime)
+{
+    return (DecodeUTCTime2FormattedAscii (utctime, "%a %b %d, %Y"));
+}
+
+/* convert DER generalized time to ascii time string, only include day,
+   not time */
+char *
+DER_GeneralizedDayToAscii(SECItem *gentime)
+{
+    return (DecodeGeneralizedTime2FormattedAscii (gentime, "%a %b %d, %Y"));
+}
+
+/* convert DER generalized or UTC time to ascii time string, only include
+   day, not time */
+char *
+DER_TimeChoiceDayToAscii(SECItem *timechoice)
+{
+    switch (timechoice->type) {
+
+    case siUTCTime:
+        return DER_UTCDayToAscii(timechoice);
+
+    case siGeneralizedTime:
+        return DER_GeneralizedDayToAscii(timechoice);
+
+    default:
+        PORT_Assert(0);
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return NULL;
+    }
+}
+
+char *
+CERT_UTCTime2FormattedAscii(PRTime utcTime, char *format)
+{
+    PRExplodedTime printableTime; 
+    char *timeString;
+   
+    /* Converse time to local time and decompose it into components */
+    PR_ExplodeTime(utcTime, PR_LocalTimeParameters, &printableTime);
+    
+    timeString = (char *)PORT_Alloc(256);
+
+    if ( timeString ) {
+        if ( ! PR_FormatTime( timeString, 256, format, &printableTime )) {
+            PORT_Free(timeString);
+            timeString = NULL;
+        }
+    }
+    
+    return (timeString);
+}
+
+char *CERT_GenTime2FormattedAscii(PRTime genTime, char *format)
+{
+    PRExplodedTime printableTime; 
+    char *timeString;
+   
+    /* Decompose time into components */
+    PR_ExplodeTime(genTime, PR_GMTParameters, &printableTime);
+    
+    timeString = (char *)PORT_Alloc(256);
+
+    if ( timeString ) {
+        if ( ! PR_FormatTime( timeString, 256, format, &printableTime )) {
+            PORT_Free(timeString);
+            timeString = NULL;
+            PORT_SetError(SEC_ERROR_OUTPUT_LEN);
+        }
+    }
+    
+    return (timeString);
+}
+
+
+/* convert DER utc time to ascii time string, The format of the time string
+   depends on the input "format"
+ */
+static char *
+DecodeUTCTime2FormattedAscii (SECItem *utcTimeDER,  char *format)
+{
+    PRTime utcTime;
+    int rv;
+   
+    rv = DER_UTCTimeToTime(&utcTime, utcTimeDER);
+    if (rv) {
+        return(NULL);
+    }
+    return (CERT_UTCTime2FormattedAscii (utcTime, format));
+}
+
+/* convert DER utc time to ascii time string, The format of the time string
+   depends on the input "format"
+ */
+static char *
+DecodeGeneralizedTime2FormattedAscii (SECItem *generalizedTimeDER,  char *format)
+{
+    PRTime generalizedTime;
+    int rv;
+   
+    rv = DER_GeneralizedTimeToTime(&generalizedTime, generalizedTimeDER);
+    if (rv) {
+        return(NULL);
+    }
+    return (CERT_GeneralizedTime2FormattedAscii (generalizedTime, format));
+}
+
+/* decode a SECItem containing either a SEC_ASN1_GENERALIZED_TIME 
+   or a SEC_ASN1_UTC_TIME */
+
+SECStatus DER_DecodeTimeChoice(PRTime* output, const SECItem* input)
+{
+    switch (input->type) {
+        case siGeneralizedTime:
+            return DER_GeneralizedTimeToTime(output, input);
+
+        case siUTCTime:
+            return DER_UTCTimeToTime(output, input);
+
+        default:
+            PORT_SetError(SEC_ERROR_INVALID_ARGS);
+            PORT_Assert(0);
+            return SECFailure;
+    }
+}
+
+/* encode a PRTime to an ASN.1 DER SECItem containing either a
+   SEC_ASN1_GENERALIZED_TIME or a SEC_ASN1_UTC_TIME */
+
+SECStatus DER_EncodeTimeChoice(PLArenaPool* arena, SECItem* output, PRTime input)
+{
+    SECStatus rv;
+
+    rv = DER_TimeToUTCTimeArena(arena, output, input);
+    if (rv == SECSuccess || PORT_GetError() != SEC_ERROR_INVALID_ARGS) {
+        return rv;
+    }
+    return DER_TimeToGeneralizedTimeArena(arena, output, input);
+}