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package org.sufficientlysecure.keychain.pgp;
import java.nio.ByteBuffer;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.spongycastle.openpgp.PGPException;
import org.spongycastle.openpgp.PGPPublicKey;
import org.spongycastle.openpgp.PGPPublicKeyRing;
import org.spongycastle.openpgp.PGPSignature;
import org.spongycastle.openpgp.PGPSignatureGenerator;
import org.spongycastle.openpgp.PGPSignatureSubpacketGenerator;
import org.spongycastle.openpgp.PGPSignatureSubpacketVector;
import org.spongycastle.openpgp.PGPUserAttributeSubpacketVector;
import org.spongycastle.openpgp.operator.jcajce.NfcSyncPGPContentSignerBuilder.NfcInteractionNeeded;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog;
import org.sufficientlysecure.keychain.service.CertifyActionsParcel.CertifyAction;
import org.sufficientlysecure.keychain.service.input.NfcOperationsParcel;
import org.sufficientlysecure.keychain.service.input.NfcOperationsParcel.NfcSignOperationsBuilder;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.util.Log;
public class PgpCertifyOperation {
public PgpCertifyResult certify(
CanonicalizedSecretKey secretKey,
CanonicalizedPublicKeyRing publicRing,
OperationLog log,
int indent,
CertifyAction action,
Map<ByteBuffer,byte[]> signedHashes,
Date creationTimestamp) {
if (!secretKey.isMasterKey()) {
throw new AssertionError("tried to certify with non-master key, this is a programming error!");
}
if (publicRing.getMasterKeyId() == secretKey.getKeyId()) {
throw new AssertionError("key tried to self-certify, this is a programming error!");
}
// create a signatureGenerator from the supplied masterKeyId and passphrase
PGPSignatureGenerator signatureGenerator = secretKey.getCertSignatureGenerator(signedHashes);
{ // supply signatureGenerator with a SubpacketVector
PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
if (creationTimestamp != null) {
spGen.setSignatureCreationTime(false, creationTimestamp);
Log.d(Constants.TAG, "For NFC: set sig creation time to " + creationTimestamp);
}
PGPSignatureSubpacketVector packetVector = spGen.generate();
signatureGenerator.setHashedSubpackets(packetVector);
}
// get the master subkey (which we certify for)
PGPPublicKey publicKey = publicRing.getPublicKey().getPublicKey();
NfcSignOperationsBuilder requiredInput = new NfcSignOperationsBuilder(creationTimestamp);
try {
if (action.mUserIds != null) {
log.add(LogType.MSG_CRT_CERTIFY_UIDS, 2, action.mUserIds.size(),
KeyFormattingUtils.convertKeyIdToHex(action.mMasterKeyId));
// fetch public key ring, add the certification and return it
for (String userId : action.mUserIds) {
try {
PGPSignature sig = signatureGenerator.generateCertification(userId, publicKey);
publicKey = PGPPublicKey.addCertification(publicKey, userId, sig);
} catch (NfcInteractionNeeded e) {
requiredInput.addHash(e.hashToSign, e.hashAlgo);
}
}
}
if (action.mUserAttributes != null) {
log.add(LogType.MSG_CRT_CERTIFY_UATS, 2, action.mUserAttributes.size(),
KeyFormattingUtils.convertKeyIdToHex(action.mMasterKeyId));
// fetch public key ring, add the certification and return it
for (WrappedUserAttribute userAttribute : action.mUserAttributes) {
PGPUserAttributeSubpacketVector vector = userAttribute.getVector();
try {
PGPSignature sig = signatureGenerator.generateCertification(vector, publicKey);
publicKey = PGPPublicKey.addCertification(publicKey, vector, sig);
} catch (NfcInteractionNeeded e) {
requiredInput.addHash(e.hashToSign, e.hashAlgo);
}
}
}
} catch (PGPException e) {
Log.e(Constants.TAG, "signing error", e);
return new PgpCertifyResult();
}
if (!requiredInput.isEmpty()) {
return new PgpCertifyResult(requiredInput.build());
}
PGPPublicKeyRing ring = PGPPublicKeyRing.insertPublicKey(publicRing.getRing(), publicKey);
return new PgpCertifyResult(new UncachedKeyRing(ring));
}
public static class PgpCertifyResult {
final NfcOperationsParcel mRequiredInput;
final UncachedKeyRing mCertifiedRing;
PgpCertifyResult() {
mRequiredInput = null;
mCertifiedRing = null;
}
PgpCertifyResult(NfcOperationsParcel requiredInput) {
mRequiredInput = requiredInput;
mCertifiedRing = null;
}
PgpCertifyResult(UncachedKeyRing certifiedRing) {
mRequiredInput = null;
mCertifiedRing = certifiedRing;
}
public boolean success() {
return mCertifiedRing != null || mRequiredInput != null;
}
public boolean nfcInputRequired() {
return mRequiredInput != null;
}
public UncachedKeyRing getCertifiedRing() {
return mCertifiedRing;
}
public NfcOperationsParcel getRequiredInput() {
return mRequiredInput;
}
}
}
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