bouncycastle uses the Date class, based off of UTC. Force all GregorianCalendars to use UTC, so get and set of key dates works as expected

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java

@@ -29,25 +29,6 @@ import android.os.Bundle;
 
 public class OtherHelper {
 
-    /**
-     * Return the number if days between two dates
-     * 
-     * @param first
-     * @param second
-     * @return number of days
-     */
-    public static long getNumDaysBetween(GregorianCalendar first, GregorianCalendar second) {
-        GregorianCalendar tmp = new GregorianCalendar();
-        tmp.setTime(first.getTime());
-        long numDays = (second.getTimeInMillis() - first.getTimeInMillis()) / 1000 / 86400;
-        tmp.add(Calendar.DAY_OF_MONTH, (int) numDays);
-        while (tmp.before(second)) {
-            tmp.add(Calendar.DAY_OF_MONTH, 1);
-            ++numDays;
-        }
-        return numDays;
-    }
-
     /**
      * Logs bundle content to debug for inspecting the content
      * 

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpKeyOperation.java

@@ -28,6 +28,7 @@ import java.security.SignatureException;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.GregorianCalendar;
+import java.util.TimeZone;
 
 import org.spongycastle.bcpg.CompressionAlgorithmTags;
 import org.spongycastle.bcpg.HashAlgorithmTags;
@@ -323,7 +324,7 @@ public class PgpKeyOperation {
         hashedPacketsGen.setPreferredCompressionAlgorithms(true, PREFERRED_COMPRESSION_ALGORITHMS);
 
         if (keysExpiryDates.get(0) != null) {
-            GregorianCalendar creationDate = new GregorianCalendar();
+            GregorianCalendar creationDate = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
             creationDate.setTime(masterPublicKey.getCreationTime());
             GregorianCalendar expiryDate = keysExpiryDates.get(0);
             //note that the below, (a/c) - (b/c) is *not* the same as (a - b) /c
@@ -402,7 +403,7 @@ public class PgpKeyOperation {
             hashedPacketsGen.setKeyFlags(false, keyFlags);
 
             if (keysExpiryDates.get(i) != null) {
-                GregorianCalendar creationDate = new GregorianCalendar();
+                GregorianCalendar creationDate = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
                 creationDate.setTime(subPublicKey.getCreationTime());
                 GregorianCalendar expiryDate = keysExpiryDates.get(i);
                 //note that the below, (a/c) - (b/c) is *not* the same as (a - b) /c

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeyEditor.java

@@ -20,6 +20,7 @@ import java.text.DateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
+import java.util.TimeZone;
 import java.util.Vector;
 
 import org.spongycastle.openpgp.PGPPublicKey;
@@ -64,7 +65,8 @@ public class KeyEditor extends LinearLayout implements Editor, OnClickListener {
         public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
             // Note: Ignore results after the first one - android sends multiples.
             if (mDatePickerResultCount++ == 0) {
-                GregorianCalendar date = new GregorianCalendar(year, monthOfYear, dayOfMonth);
+                GregorianCalendar date = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
+                date.set(year, monthOfYear, dayOfMonth);
                 setExpiryDate(date);
             }
         }
@@ -109,7 +111,7 @@ public class KeyEditor extends LinearLayout implements Editor, OnClickListener {
             public void onClick(View v) {
                 GregorianCalendar date = mExpiryDate;
                 if (date == null) {
-                    date = new GregorianCalendar();
+                    date = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
                 }
 
                 DatePickerDialog dialog = new DatePickerDialog(getContext(),
@@ -201,10 +203,10 @@ public class KeyEditor extends LinearLayout implements Editor, OnClickListener {
             }
         }
 
-        GregorianCalendar cal = new GregorianCalendar();
+        GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
         cal.setTime(PgpKeyHelper.getCreationDate(key));
         mCreationDate.setText(DateFormat.getDateInstance().format(cal.getTime()));
-        cal = new GregorianCalendar();
+        cal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
         Date expiryDate = PgpKeyHelper.getExpiryDate(key);
         if (expiryDate == null) {
             setExpiryDate(null);

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/util/HkpKeyServer.java

@@ -29,6 +29,7 @@ import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.GregorianCalendar;
 import java.util.List;
+import java.util.TimeZone;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -182,8 +183,11 @@ public class HkpKeyServer extends KeyServer {
             info.keyId = PgpKeyHelper.convertHexToKeyId(matcher.group(3));
             info.fingerPrint = PgpKeyHelper.convertKeyIdToHex(info.keyId);
             String chunks[] = matcher.group(4).split("-");
-            info.date = new GregorianCalendar(Integer.parseInt(chunks[0]),
+
-                    Integer.parseInt(chunks[1]), Integer.parseInt(chunks[2])).getTime();
+            GregorianCalendar tmpGreg = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
+            tmpGreg.set(Integer.parseInt(chunks[0]), Integer.parseInt(chunks[1]),
+               Integer.parseInt(chunks[2]));
+            info.date = tmpGreg.getTime();
             info.userIds = new ArrayList<String>();
             if (matcher.group(5).startsWith("*** KEY")) {
                 info.revoked = matcher.group(5);