diff --git a/OpenKeychain-Test/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java b/OpenKeychain-Test/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java
index ba7a31e65..d782230c7 100644
--- a/OpenKeychain-Test/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java
+++ b/OpenKeychain-Test/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java
@@ -22,6 +22,7 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.openintents.openpgp.OpenPgpMetadata;
 import org.openintents.openpgp.OpenPgpSignatureResult;
 import org.robolectric.*;
 import org.robolectric.shadows.ShadowLog;
@@ -162,6 +163,10 @@ public class PgpEncryptDecryptTest {
             Assert.assertArrayEquals("decrypted ciphertext should equal plaintext",
                     out.toByteArray(), plaintext.getBytes());
             Assert.assertNull("signature should be an error", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
         }
 
         { // decryption with a bad passphrase should fail
@@ -239,6 +244,11 @@ public class PgpEncryptDecryptTest {
             Assert.assertArrayEquals("decrypted ciphertext with provided passphrase should equal plaintext",
                     out.toByteArray(), plaintext.getBytes());
             Assert.assertNull("signature be empty", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
+
         }
 
         // TODO how to test passphrase cache?
@@ -318,6 +328,10 @@ public class PgpEncryptDecryptTest {
             Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
                     out.toByteArray(), plaintext.getBytes());
             Assert.assertNull("signature should be empty", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
         }
 
         { // decryption with passphrase cached should succeed for the first key
@@ -411,6 +425,10 @@ public class PgpEncryptDecryptTest {
                     out.toByteArray(), plaintext.getBytes());
             Assert.assertEquals("signature should be verified and certified",
                     OpenPgpSignatureResult.SIGNATURE_SUCCESS_CERTIFIED, result.getSignatureResult().getStatus());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
         }
 
         { // decryption with passphrase cached should succeed for the other key if first is gone
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java
index 078eb7354..ec26d4bbe 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java
@@ -555,6 +555,7 @@ public abstract class OperationResult implements Parcelable {
         MSG_DC_CLEAR_META_FILE (LogLevel.DEBUG, R.string.msg_dc_clear_meta_file),
         MSG_DC_CLEAR_META_MIME (LogLevel.DEBUG, R.string.msg_dc_clear_meta_mime),
         MSG_DC_CLEAR_META_SIZE (LogLevel.DEBUG, R.string.msg_dc_clear_meta_size),
+        MSG_DC_CLEAR_META_SIZE_UNKNOWN (LogLevel.DEBUG, R.string.msg_dc_clear_meta_size_unknown),
         MSG_DC_CLEAR_META_TIME (LogLevel.DEBUG, R.string.msg_dc_clear_meta_time),
         MSG_DC_CLEAR (LogLevel.DEBUG, R.string.msg_dc_clear),
         MSG_DC_CLEAR_SIGNATURE_BAD (LogLevel.WARN, R.string.msg_dc_clear_signature_bad),
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
index ad9b1900e..2ee923e42 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
@@ -160,9 +160,6 @@ public class PgpDecryptVerify extends BaseOperation {
 
         /**
          * If detachedSignature != null, it will be used exclusively to verify the signature
-         *
-         * @param detachedSignature
-         * @return
          */
         public Builder setDetachedSignature(byte[] detachedSignature) {
             mDetachedSignature = detachedSignature;
@@ -540,12 +537,8 @@ public class PgpDecryptVerify extends BaseOperation {
 
             PGPLiteralData literalData = (PGPLiteralData) dataChunk;
 
-            // TODO: how to get the real original size?
-            // this is the encrypted size so if we enable compression this value is wrong!
-            long originalSize = mData.getSize() - mData.getStreamPosition();
-            if (originalSize < 0) {
-                originalSize = 0;
-            }
+            // reported size may be null if partial packets are involved (highly unlikely though)
+            Long originalSize = literalData.getDataLengthIfAvailable();
 
             String originalFilename = literalData.getFileName();
             String mimeType = null;
@@ -573,18 +566,20 @@ public class PgpDecryptVerify extends BaseOperation {
                     originalFilename,
                     mimeType,
                     literalData.getModificationTime().getTime(),
-                    originalSize);
+                    originalSize == null ? 0 : originalSize);
 
-            if (!originalFilename.equals("")) {
+            if (!"".equals(originalFilename)) {
                 log.add(LogType.MSG_DC_CLEAR_META_FILE, indent + 1, originalFilename);
             }
             log.add(LogType.MSG_DC_CLEAR_META_MIME, indent + 1,
                     mimeType);
             log.add(LogType.MSG_DC_CLEAR_META_TIME, indent + 1,
                     new Date(literalData.getModificationTime().getTime()).toString());
-            if (originalSize != 0) {
+            if (originalSize != null) {
                 log.add(LogType.MSG_DC_CLEAR_META_SIZE, indent + 1,
                         Long.toString(originalSize));
+            } else {
+                log.add(LogType.MSG_DC_CLEAR_META_SIZE_UNKNOWN, indent + 1);
             }
 
             // return here if we want to decrypt the metadata only
@@ -633,9 +628,8 @@ public class PgpDecryptVerify extends BaseOperation {
                         progress = 100;
                     }
                     progressScaler.setProgress((int) progress, 100);
-                } else {
-                    // TODO: slow annealing to fake a progress?
                 }
+                // TODO: slow annealing to fake a progress?
             }
 
             if (signature != null) {
@@ -851,9 +845,8 @@ public class PgpDecryptVerify extends BaseOperation {
                         progress = 100;
                     }
                     progressScaler.setProgress((int) progress, 100);
-                } else {
-                    // TODO: slow annealing to fake a progress?
                 }
+                // TODO: slow annealing to fake a progress?
             }
 
             updateProgress(R.string.progress_verifying_signature, 90, 100);
diff --git a/OpenKeychain/src/main/res/values/strings.xml b/OpenKeychain/src/main/res/values/strings.xml
index e01f1c049..c2a44f0f9 100644
--- a/OpenKeychain/src/main/res/values/strings.xml
+++ b/OpenKeychain/src/main/res/values/strings.xml
@@ -935,6 +935,7 @@
     <string name="msg_dc_clear_meta_file">"Filename: %s"</string>
     <string name="msg_dc_clear_meta_mime">"MIME type: %s"</string>
     <string name="msg_dc_clear_meta_size">"Filesize: %s"</string>
+    <string name="msg_dc_clear_meta_size_unknown">"Filesize is unknown"</string>
     <string name="msg_dc_clear_meta_time">"Modification time: %s"</string>
     <string name="msg_dc_clear_signature_bad">"Signature check NOT OK!"</string>
     <string name="msg_dc_clear_signature_check">"Verifying signature data"</string>
diff --git a/extern/spongycastle b/extern/spongycastle
index 26c232f31..939914d9f 160000
--- a/extern/spongycastle
+++ b/extern/spongycastle
@@ -1 +1 @@
-Subproject commit 26c232f31b62404ecb5d3ae3d2c1730fd0a0a0eb
+Subproject commit 939914d9ffd1e8cc2710de6c600c9ccfc86aa545