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Merge branch 'result-parcels'

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This commit is contained in:
Vincent Breitmoser
2014-09-13 21:32:17 +02:00
parent a1323a1a14 7b08b18d25
commit f8677a5f16
10 changed files with 383 additions and 215 deletions
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256
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
View File

@@ -48,6 +48,10 @@ import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.service.results.DecryptVerifyResult;
import org.sufficientlysecure.keychain.service.results.OperationResultParcel.LogLevel;
import org.sufficientlysecure.keychain.service.results.OperationResultParcel.LogType;
import org.sufficientlysecure.keychain.service.results.OperationResultParcel.OperationLog;
import org.sufficientlysecure.keychain.util.InputData;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.ProgressScaler;
@@ -60,6 +64,7 @@ import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLConnection;
import java.security.SignatureException;
import java.util.Date;
import java.util.Iterator;
import java.util.Set;
@@ -177,73 +182,52 @@ public class PgpDecryptVerify {
throws NoSecretKeyException;
}
public static class InvalidDataException extends Exception {
public InvalidDataException() {
}
}
public static class KeyExtractionException extends Exception {
public KeyExtractionException() {
}
}
public static class WrongPassphraseException extends Exception {
public WrongPassphraseException() {
}
}
public static class NoSecretKeyException extends Exception {
public NoSecretKeyException() {
}
}
public static class IntegrityCheckFailedException extends Exception {
public IntegrityCheckFailedException() {
}
}
public static class NeedNfcDataException extends Exception {
public byte[] mEncryptedSessionKey;
public String mPassphrase;
public NeedNfcDataException(byte[] encryptedSessionKey, String passphrase) {
mEncryptedSessionKey = encryptedSessionKey;
mPassphrase = passphrase;
}
}
/**
* Decrypts and/or verifies data based on parameters of class
*/
public PgpDecryptVerifyResult execute()
throws IOException, PGPException, SignatureException,
WrongPassphraseException, NoSecretKeyException, KeyExtractionException,
InvalidDataException, IntegrityCheckFailedException, NeedNfcDataException {
// automatically works with ascii armor input and binary
InputStream in = PGPUtil.getDecoderStream(mData.getInputStream());
if (in instanceof ArmoredInputStream) {
ArmoredInputStream aIn = (ArmoredInputStream) in;
// it is ascii armored
Log.d(Constants.TAG, "ASCII Armor Header Line: " + aIn.getArmorHeaderLine());
public DecryptVerifyResult execute() {
try {
// automatically works with ascii armor input and binary
InputStream in = PGPUtil.getDecoderStream(mData.getInputStream());
if (aIn.isClearText()) {
// a cleartext signature, verify it with the other method
return verifyCleartextSignature(aIn);
if (in instanceof ArmoredInputStream) {
ArmoredInputStream aIn = (ArmoredInputStream) in;
// it is ascii armored
Log.d(Constants.TAG, "ASCII Armor Header Line: " + aIn.getArmorHeaderLine());
if (aIn.isClearText()) {
// a cleartext signature, verify it with the other method
return verifyCleartextSignature(aIn);
}
// else: ascii armored encryption! go on...
}
// else: ascii armored encryption! go on...
}
return decryptVerify(in);
return decryptVerify(in, 0);
} catch (PGPException e) {
OperationLog log = new OperationLog();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_PGP_EXCEPTION, 1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
} catch (IOException e) {
OperationLog log = new OperationLog();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_IO, 1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
}
/**
* Decrypt and/or verifies binary or ascii armored pgp
*/
private PgpDecryptVerifyResult decryptVerify(InputStream in)
throws IOException, PGPException, SignatureException,
WrongPassphraseException, KeyExtractionException, NoSecretKeyException,
InvalidDataException, IntegrityCheckFailedException, NeedNfcDataException {
PgpDecryptVerifyResult result = new PgpDecryptVerifyResult();
private DecryptVerifyResult decryptVerify(InputStream in, int indent) throws IOException, PGPException {
OperationLog log = new OperationLog();
log.add(LogLevel.START, LogType.MSG_DC, indent);
indent += 1;
PGPObjectFactory pgpF = new PGPObjectFactory(in, new JcaKeyFingerprintCalculator());
PGPEncryptedDataList enc;
@@ -259,7 +243,8 @@ public class PgpDecryptVerify {
}
if (enc == null) {
throw new InvalidDataException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_INVALID_SIGLIST, indent);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
InputStream clear;
@@ -271,35 +256,44 @@ public class PgpDecryptVerify {
Iterator<?> it = enc.getEncryptedDataObjects();
boolean asymmetricPacketFound = false;
boolean symmetricPacketFound = false;
boolean anyPacketFound = false;
// go through all objects and find one we can decrypt
while (it.hasNext()) {
Object obj = it.next();
if (obj instanceof PGPPublicKeyEncryptedData) {
anyPacketFound = true;
currentProgress += 2;
updateProgress(R.string.progress_finding_key, currentProgress, 100);
PGPPublicKeyEncryptedData encData = (PGPPublicKeyEncryptedData) obj;
long subKeyId = encData.getKeyID();
log.add(LogLevel.DEBUG, LogType.MSG_DC_ASYM, indent,
PgpKeyHelper.convertKeyIdToHex(subKeyId));
CanonicalizedSecretKeyRing secretKeyRing;
try {
// get actual keyring object based on master key id
secretKeyRing = mProviderHelper.getCanonicalizedSecretKeyRing(
KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(encData.getKeyID())
KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId)
);
} catch (ProviderHelper.NotFoundException e) {
// continue with the next packet in the while loop
log.add(LogLevel.DEBUG, LogType.MSG_DC_ASKIP_NO_KEY, indent +1);
continue;
}
if (secretKeyRing == null) {
// continue with the next packet in the while loop
log.add(LogLevel.DEBUG, LogType.MSG_DC_ASKIP_NO_KEY, indent +1);
continue;
}
// get subkey which has been used for this encryption packet
secretEncryptionKey = secretKeyRing.getSecretKey(subKeyId);
if (secretEncryptionKey == null) {
// continue with the next packet in the while loop
// should actually never happen, so no need to be more specific.
log.add(LogLevel.DEBUG, LogType.MSG_DC_ASKIP_NO_KEY, indent +1);
continue;
}
@@ -313,6 +307,7 @@ public class PgpDecryptVerify {
if (!mAllowedKeyIds.contains(masterKeyId)) {
// this key is in our db, but NOT allowed!
// continue with the next packet in the while loop
log.add(LogLevel.DEBUG, LogType.MSG_DC_ASKIP_NOT_ALLOWED, indent +1);
continue;
}
}
@@ -324,22 +319,38 @@ public class PgpDecryptVerify {
// if no passphrase was explicitly set try to get it from the cache service
if (mPassphrase == null) {
// returns "" if key has no passphrase
mPassphrase = mPassphraseCache.getCachedPassphrase(subKeyId);
try {
// returns "" if key has no passphrase
mPassphrase = mPassphraseCache.getCachedPassphrase(subKeyId);
log.add(LogLevel.DEBUG, LogType.MSG_DC_PASS_CACHED, indent +1);
} catch (NoSecretKeyException e) {
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_NO_KEY, indent +1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
// if passphrase was not cached, return here
// indicating that a passphrase is missing!
// if passphrase was not cached, return here indicating that a passphrase is missing!
if (mPassphrase == null) {
log.add(LogLevel.INFO, LogType.MSG_DC_PENDING_PASSPHRASE, indent +1);
DecryptVerifyResult result =
new DecryptVerifyResult(DecryptVerifyResult.RESULT_PENDING_ASYM_PASSPHRASE, log);
result.setKeyIdPassphraseNeeded(subKeyId);
result.setStatus(PgpDecryptVerifyResult.KEY_PASSHRASE_NEEDED);
return result;
}
}
// break out of while, only decrypt the first packet where we have a key
// TODO???: There could be more pgp objects, which are not decrypted!
break;
} else if (mAllowSymmetricDecryption && obj instanceof PGPPBEEncryptedData) {
} else if (obj instanceof PGPPBEEncryptedData) {
anyPacketFound = true;
log.add(LogLevel.DEBUG, LogType.MSG_DC_SYM, indent);
if (! mAllowSymmetricDecryption) {
log.add(LogLevel.WARN, LogType.MSG_DC_SYM_SKIP, indent +1);
continue;
}
/*
* When mAllowSymmetricDecryption == true and we find a data packet here,
* we do not search for other available asymmetric packets!
@@ -351,16 +362,30 @@ public class PgpDecryptVerify {
// if no passphrase is given, return here
// indicating that a passphrase is missing!
if (mPassphrase == null) {
result.setStatus(PgpDecryptVerifyResult.SYMMETRIC_PASSHRASE_NEEDED);
return result;
log.add(LogLevel.INFO, LogType.MSG_DC_PENDING_PASSPHRASE, indent +1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_PENDING_SYM_PASSPHRASE, log);
}
// break out of while, only decrypt the first packet
// TODO???: There could be more pgp objects, which are not decrypted!
break;
}
}
// More data, just acknowledge and ignore.
while (it.hasNext()) {
Object obj = it.next();
if (obj instanceof PGPPublicKeyEncryptedData) {
log.add(LogLevel.WARN, LogType.MSG_DC_TRAIL_ASYM, 0);
} else if (obj instanceof PGPPBEEncryptedData) {
log.add(LogLevel.WARN, LogType.MSG_DC_TRAIL_SYM, 0);
} else {
log.add(LogLevel.WARN, LogType.MSG_DC_TRAIL_UNKNOWN, 0);
}
}
log.add(LogLevel.DEBUG, LogType.MSG_DC_PREP_STREAMS, indent);
// we made sure above one of these two would be true
if (symmetricPacketFound) {
currentProgress += 2;
updateProgress(R.string.progress_preparing_streams, currentProgress, 100);
@@ -372,17 +397,21 @@ public class PgpDecryptVerify {
mPassphrase.toCharArray());
clear = encryptedDataSymmetric.getDataStream(decryptorFactory);
encryptedData = encryptedDataSymmetric;
} else if (asymmetricPacketFound) {
currentProgress += 2;
updateProgress(R.string.progress_extracting_key, currentProgress, 100);
try {
log.add(LogLevel.INFO, LogType.MSG_DC_UNLOCKING, indent +1);
if (!secretEncryptionKey.unlock(mPassphrase)) {
throw new WrongPassphraseException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_BAD_PASSPHRASE, indent +1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
} catch (PgpGeneralException e) {
throw new KeyExtractionException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_EXTRACT_KEY, indent +1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
currentProgress += 2;
@@ -393,12 +422,20 @@ public class PgpDecryptVerify {
= secretEncryptionKey.getDecryptorFactory(mDecryptedSessionKey);
clear = encryptedDataAsymmetric.getDataStream(decryptorFactory);
} catch (NfcSyncPublicKeyDataDecryptorFactoryBuilder.NfcInteractionNeeded e) {
throw new NeedNfcDataException(e.encryptedSessionKey, mPassphrase);
log.add(LogLevel.INFO, LogType.MSG_DC_PENDING_NFC, indent +1);
DecryptVerifyResult result =
new DecryptVerifyResult(DecryptVerifyResult.RESULT_PENDING_NFC, log);
result.setNfcEncryptedSessionKey(e.encryptedSessionKey);
// TODO save passphrase here?
return result;
}
encryptedData = encryptedDataAsymmetric;
} else {
// If we didn't find any useful data, error out
// no packet has been found where we have the corresponding secret key in our db
throw new NoSecretKeyException();
log.add(LogLevel.ERROR,
anyPacketFound ? LogType.MSG_DC_ERROR_NO_KEY : LogType.MSG_DC_ERROR_NO_DATA, indent +1);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
PGPObjectFactory plainFact = new PGPObjectFactory(clear, new JcaKeyFingerprintCalculator());
@@ -408,7 +445,11 @@ public class PgpDecryptVerify {
CanonicalizedPublicKeyRing signingRing = null;
CanonicalizedPublicKey signingKey = null;
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR, indent);
indent += 1;
if (dataChunk instanceof PGPCompressedData) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_DECOMPRESS, indent +1);
currentProgress += 2;
updateProgress(R.string.progress_decompressing_data, currentProgress, 100);
@@ -421,6 +462,7 @@ public class PgpDecryptVerify {
PGPOnePassSignature signature = null;
if (dataChunk instanceof PGPOnePassSignatureList) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_SIGNATURE, indent +1);
currentProgress += 2;
updateProgress(R.string.progress_processing_signature, currentProgress, 100);
@@ -468,7 +510,11 @@ public class PgpDecryptVerify {
dataChunk = plainFact.nextObject();
}
OpenPgpMetadata metadata;
if (dataChunk instanceof PGPLiteralData) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_DATA, indent +1);
indent += 2;
currentProgress += 4;
updateProgress(R.string.progress_decrypting, currentProgress, 100);
@@ -503,17 +549,30 @@ public class PgpDecryptVerify {
}
}
OpenPgpMetadata metadata = new OpenPgpMetadata(
metadata = new OpenPgpMetadata(
originalFilename,
mimeType,
literalData.getModificationTime().getTime(),
originalSize);
result.setDecryptMetadata(metadata);
Log.d(Constants.TAG, "metadata: " + metadata);
if ( ! originalFilename.equals("")) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_META_FILE, indent + 1, originalFilename);
}
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_META_MIME, indent +1,
mimeType);
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_META_TIME, indent +1,
new Date(literalData.getModificationTime().getTime()).toString());
if (originalSize != 0) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_META_SIZE, indent + 1,
Long.toString(originalSize));
}
// return here if we want to decrypt the metadata only
if (mDecryptMetadataOnly) {
log.add(LogLevel.OK, LogType.MSG_DC_OK_META_ONLY, indent);
DecryptVerifyResult result =
new DecryptVerifyResult(DecryptVerifyResult.RESULT_OK, log);
result.setDecryptMetadata(metadata);
return result;
}
@@ -557,6 +616,7 @@ public class PgpDecryptVerify {
if (signature != null) {
updateProgress(R.string.progress_verifying_signature, 90, 100);
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_SIGNATURE_CHECK, indent);
PGPSignatureList signatureList = (PGPSignatureList) plainFact.nextObject();
PGPSignature messageSignature = signatureList.get(signatureIndex);
@@ -567,20 +627,28 @@ public class PgpDecryptVerify {
// Verify signature and check binding signatures
boolean validSignature = signature.verify(messageSignature);
if (validSignature) {
log.add(LogLevel.DEBUG, LogType.MSG_DC_CLEAR_SIGNATURE_OK, indent +1);
} else {
log.add(LogLevel.WARN, LogType.MSG_DC_CLEAR_SIGNATURE_BAD, indent +1);
}
signatureResultBuilder.setValidSignature(validSignature);
}
indent -= 1;
} else {
// If there is no literalData, we don't have any metadata
metadata = null;
}
if (encryptedData.isIntegrityProtected()) {
updateProgress(R.string.progress_verifying_integrity, 95, 100);
if (encryptedData.verify()) {
// passed
Log.d(Constants.TAG, "Integrity verification: success!");
log.add(LogLevel.INFO, LogType.MSG_DC_INTEGRITY_CHECK_OK, indent);
} else {
// failed
Log.d(Constants.TAG, "Integrity verification: failed!");
throw new IntegrityCheckFailedException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_INTEGRITY_CHECK, indent);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
} else {
// no integrity check
@@ -590,14 +658,22 @@ public class PgpDecryptVerify {
// Handle missing integrity protection like failed integrity protection!
// The MDC packet can be stripped by an attacker!
if (!signatureResultBuilder.isValidSignature()) {
throw new IntegrityCheckFailedException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_INTEGRITY_CHECK, indent);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
}
updateProgress(R.string.progress_done, 100, 100);
log.add(LogLevel.OK, LogType.MSG_DC_OK, indent);
// Return a positive result, with metadata and verification info
DecryptVerifyResult result =
new DecryptVerifyResult(DecryptVerifyResult.RESULT_OK, log);
result.setDecryptMetadata(metadata);
result.setSignatureResult(signatureResultBuilder.build());
return result;
}
/**
@@ -607,9 +683,11 @@ public class PgpDecryptVerify {
* The method is heavily based on
* pg/src/main/java/org/spongycastle/openpgp/examples/ClearSignedFileProcessor.java
*/
private PgpDecryptVerifyResult verifyCleartextSignature(ArmoredInputStream aIn)
throws IOException, PGPException, SignatureException, InvalidDataException {
PgpDecryptVerifyResult result = new PgpDecryptVerifyResult();
private DecryptVerifyResult verifyCleartextSignature(ArmoredInputStream aIn)
throws IOException, PGPException {
OperationLog log = new OperationLog();
OpenPgpSignatureResultBuilder signatureResultBuilder = new OpenPgpSignatureResultBuilder();
// cleartext signatures are never encrypted ;)
signatureResultBuilder.setSignatureOnly(true);
@@ -643,7 +721,8 @@ public class PgpDecryptVerify {
PGPSignatureList sigList = (PGPSignatureList) pgpFact.nextObject();
if (sigList == null) {
throw new InvalidDataException();
log.add(LogLevel.ERROR, LogType.MSG_DC_ERROR_INVALID_SIGLIST, 0);
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
CanonicalizedPublicKeyRing signingRing = null;
@@ -686,7 +765,7 @@ public class PgpDecryptVerify {
}
}
if (signature != null) {
if (signature != null) try {
updateProgress(R.string.progress_verifying_signature, 90, 100);
InputStream sigIn = new BufferedInputStream(new ByteArrayInputStream(clearText));
@@ -708,13 +787,16 @@ public class PgpDecryptVerify {
// Verify signature and check binding signatures
boolean validSignature = signature.verify();
signatureResultBuilder.setValidSignature(validSignature);
} catch (SignatureException e) {
return new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log);
}
result.setSignatureResult(signatureResultBuilder.build());
updateProgress(R.string.progress_done, 100, 100);
DecryptVerifyResult result = new DecryptVerifyResult(DecryptVerifyResult.RESULT_OK, log);
result.setSignatureResult(signatureResultBuilder.build());
return result;
}

106
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyResult.java
View File

@@ -1,106 +0,0 @@
/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.pgp;
import android.os.Parcel;
import android.os.Parcelable;
import org.openintents.openpgp.OpenPgpMetadata;
import org.openintents.openpgp.OpenPgpSignatureResult;
public class PgpDecryptVerifyResult implements Parcelable {
public static final int SUCCESS = 1;
public static final int KEY_PASSHRASE_NEEDED = 2;
public static final int SYMMETRIC_PASSHRASE_NEEDED = 3;
int mStatus;
long mKeyIdPassphraseNeeded;
OpenPgpSignatureResult mSignatureResult;
OpenPgpMetadata mDecryptMetadata;
public int getStatus() {
return mStatus;
}
public void setStatus(int status) {
mStatus = status;
}
public long getKeyIdPassphraseNeeded() {
return mKeyIdPassphraseNeeded;
}
public void setKeyIdPassphraseNeeded(long keyIdPassphraseNeeded) {
mKeyIdPassphraseNeeded = keyIdPassphraseNeeded;
}
public OpenPgpSignatureResult getSignatureResult() {
return mSignatureResult;
}
public void setSignatureResult(OpenPgpSignatureResult signatureResult) {
mSignatureResult = signatureResult;
}
public OpenPgpMetadata getDecryptMetadata() {
return mDecryptMetadata;
}
public void setDecryptMetadata(OpenPgpMetadata decryptMetadata) {
mDecryptMetadata = decryptMetadata;
}
public PgpDecryptVerifyResult() {
}
public PgpDecryptVerifyResult(PgpDecryptVerifyResult b) {
this.mStatus = b.mStatus;
this.mKeyIdPassphraseNeeded = b.mKeyIdPassphraseNeeded;
this.mSignatureResult = b.mSignatureResult;
this.mDecryptMetadata = b.mDecryptMetadata;
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mStatus);
dest.writeLong(mKeyIdPassphraseNeeded);
dest.writeParcelable(mSignatureResult, 0);
dest.writeParcelable(mDecryptMetadata, 0);
}
public static final Creator<PgpDecryptVerifyResult> CREATOR = new Creator<PgpDecryptVerifyResult>() {
public PgpDecryptVerifyResult createFromParcel(final Parcel source) {
PgpDecryptVerifyResult vr = new PgpDecryptVerifyResult();
vr.mStatus = source.readInt();
vr.mKeyIdPassphraseNeeded = source.readLong();
vr.mSignatureResult = source.readParcelable(OpenPgpSignatureResult.class.getClassLoader());
vr.mDecryptMetadata = source.readParcelable(OpenPgpMetadata.class.getClassLoader());
return vr;
}
public PgpDecryptVerifyResult[] newArray(final int size) {
return new PgpDecryptVerifyResult[size];
}
};
}