mirror of
https://github.com/moparisthebest/open-keychain
synced 2024-11-23 09:12:16 -05:00
Fix decryption of messages/files encrypted for multiple public keys
This commit is contained in:
Dominik Schürmann
parent
a1efb24228
commit
d81de8509b
@ -200,7 +200,7 @@ public class PgpDecryptVerify {
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*/
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private PgpDecryptVerifyResult decryptVerify(InputStream in)
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throws IOException, PgpGeneralException, PGPException, SignatureException {
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PgpDecryptVerifyResult returnData = new PgpDecryptVerifyResult();
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PgpDecryptVerifyResult result = new PgpDecryptVerifyResult();
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PGPObjectFactory pgpF = new PGPObjectFactory(in);
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PGPEncryptedDataList enc;
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@ -228,6 +228,7 @@ public class PgpDecryptVerify {
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PGPPBEEncryptedData encryptedDataSymmetric = null;
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PGPSecretKey secretKey = null;
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Iterator<?> it = enc.getEncryptedDataObjects();
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boolean asymmetricPacketFound = false;
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boolean symmetricPacketFound = false;
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// find secret key
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while (it.hasNext()) {
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@ -245,18 +246,22 @@ public class PgpDecryptVerify {
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);
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} catch (ProviderHelper.NotFoundException e) {
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Log.e(Constants.TAG, "key not found!", e);
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// continue with the next packet in the while loop
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continue;
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}
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// get actual keyring object based on master key id
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PGPSecretKeyRing secretKeyRing = ProviderHelper.getPGPSecretKeyRing(mContext, masterKeyId);
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if (secretKeyRing == null) {
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throw new PgpGeneralException(mContext.getString(R.string.error_no_secret_key_found));
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// continue with the next packet in the while loop
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continue;
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}
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secretKey = secretKeyRing.getSecretKey(encData.getKeyID());
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if (secretKey == null) {
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throw new PgpGeneralException(mContext.getString(R.string.error_no_secret_key_found));
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// continue with the next packet in the while loop
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continue;
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}
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// secret key exists in database
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/* secret key exists in database! */
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// allow only a specific key for decryption?
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if (mAllowedKeyIds != null) {
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@ -265,11 +270,15 @@ public class PgpDecryptVerify {
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Log.d(Constants.TAG, "masterKeyId: " + masterKeyId);
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if (!mAllowedKeyIds.contains(masterKeyId)) {
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throw new PgpGeneralException(
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mContext.getString(R.string.error_no_secret_key_found));
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// this key is in our db, but NOT allowed!
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// continue with the next packet in the while loop
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continue;
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}
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}
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/* secret key exists in database and is allowed! */
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asymmetricPacketFound = true;
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encryptedDataAsymmetric = encData;
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// if no passphrase was explicitly set try to get it from the cache service
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@ -281,16 +290,20 @@ public class PgpDecryptVerify {
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// if passphrase was not cached, return here
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// indicating that a passphrase is missing!
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if (mPassphrase == null) {
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returnData.setKeyIdPassphraseNeeded(masterKeyId);
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returnData.setStatus(PgpDecryptVerifyResult.KEY_PASSHRASE_NEEDED);
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return returnData;
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result.setKeyIdPassphraseNeeded(masterKeyId);
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result.setStatus(PgpDecryptVerifyResult.KEY_PASSHRASE_NEEDED);
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return result;
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}
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}
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// break out of while, only get first object here
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// break out of while, only decrypt the first packet where we have a key
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// TODO???: There could be more pgp objects, which are not decrypted!
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break;
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} else if (mAllowSymmetricDecryption && obj instanceof PGPPBEEncryptedData) {
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/*
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* When mAllowSymmetricDecryption == true and we find a data packet here,
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* we do not search for other available asymmetric packets!
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*/
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symmetricPacketFound = true;
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encryptedDataSymmetric = (PGPPBEEncryptedData) obj;
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@ -298,11 +311,11 @@ public class PgpDecryptVerify {
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// if no passphrase is given, return here
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// indicating that a passphrase is missing!
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if (mPassphrase == null) {
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returnData.setStatus(PgpDecryptVerifyResult.SYMMETRIC_PASSHRASE_NEEDED);
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return returnData;
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result.setStatus(PgpDecryptVerifyResult.SYMMETRIC_PASSHRASE_NEEDED);
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return result;
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}
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// break out of while, only get first object here
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// break out of while, only decrypt the first packet
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// TODO???: There could be more pgp objects, which are not decrypted!
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break;
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}
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@ -321,11 +334,7 @@ public class PgpDecryptVerify {
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encryptedData = encryptedDataSymmetric;
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currentProgress += 5;
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} else {
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if (secretKey == null) {
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throw new PgpGeneralException(mContext.getString(R.string.error_no_secret_key_found));
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}
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} else if (asymmetricPacketFound) {
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currentProgress += 5;
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updateProgress(R.string.progress_extracting_key, currentProgress, 100);
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PGPPrivateKey privateKey;
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@ -351,6 +360,9 @@ public class PgpDecryptVerify {
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encryptedData = encryptedDataAsymmetric;
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currentProgress += 5;
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} else {
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// no packet has been found where we have the corresponding secret key in our db
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throw new PgpGeneralException(mContext.getString(R.string.error_no_secret_key_found));
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}
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PGPObjectFactory plainFact = new PGPObjectFactory(clear);
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@ -379,7 +391,7 @@ public class PgpDecryptVerify {
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for (int i = 0; i < sigList.size(); ++i) {
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signature = sigList.get(i);
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signatureKey = ProviderHelper
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.getPGPPublicKeyRing(mContext, signature.getKeyID()).getPublicKey();
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.getPGPPublicKeyRingWithKeyId(mContext, signature.getKeyID()).getPublicKey();
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if (signatureKeyId == 0) {
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signatureKeyId = signature.getKeyID();
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}
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@ -408,6 +420,7 @@ public class PgpDecryptVerify {
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signature.init(contentVerifierBuilderProvider, signatureKey);
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} else {
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Log.d(Constants.TAG, "SIGNATURE_UNKNOWN_PUB_KEY");
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_UNKNOWN_PUB_KEY);
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}
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@ -446,6 +459,7 @@ public class PgpDecryptVerify {
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try {
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signature.update(buffer, 0, n);
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} catch (SignatureException e) {
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Log.d(Constants.TAG, "SIGNATURE_ERROR");
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_ERROR);
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signature = null;
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}
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@ -479,7 +493,12 @@ public class PgpDecryptVerify {
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// TODO: implement CERTIFIED!
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if (validKeyBinding & validSignature) {
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Log.d(Constants.TAG, "SIGNATURE_SUCCESS_UNCERTIFIED");
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_SUCCESS_UNCERTIFIED);
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} else {
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_ERROR);
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Log.e(Constants.TAG, "Error!\nvalidKeyBinding: " + validKeyBinding
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+ "\nvalidSignature: " + validSignature);
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}
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}
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}
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@ -503,8 +522,8 @@ public class PgpDecryptVerify {
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updateProgress(R.string.progress_done, 100, 100);
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returnData.setSignatureResult(signatureResult);
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return returnData;
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result.setSignatureResult(signatureResult);
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return result;
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}
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/**
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@ -522,7 +541,7 @@ public class PgpDecryptVerify {
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*/
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private PgpDecryptVerifyResult verifyCleartextSignature(ArmoredInputStream aIn)
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throws IOException, PgpGeneralException, PGPException, SignatureException {
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PgpDecryptVerifyResult returnData = new PgpDecryptVerifyResult();
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PgpDecryptVerifyResult result = new PgpDecryptVerifyResult();
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OpenPgpSignatureResult signatureResult = new OpenPgpSignatureResult();
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// cleartext signatures are never encrypted ;)
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signatureResult.setSignatureOnly(true);
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@ -569,10 +588,10 @@ public class PgpDecryptVerify {
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// find data about this subkey
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HashMap<String, Object> data = ProviderHelper.getGenericData(mContext,
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KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(signature.getKeyID())),
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new String[] { KeyRings.MASTER_KEY_ID, KeyRings.USER_ID },
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new int[] { ProviderHelper.FIELD_TYPE_INTEGER, ProviderHelper.FIELD_TYPE_STRING });
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new String[]{KeyRings.MASTER_KEY_ID, KeyRings.USER_ID},
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new int[]{ProviderHelper.FIELD_TYPE_INTEGER, ProviderHelper.FIELD_TYPE_STRING});
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// any luck? otherwise, try next.
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if(data.get(KeyRings.MASTER_KEY_ID) == null) {
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if (data.get(KeyRings.MASTER_KEY_ID) == null) {
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signature = null;
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// do NOT reset signatureKeyId, that one is shown when no known one is found!
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continue;
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@ -588,11 +607,12 @@ public class PgpDecryptVerify {
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signatureResult.setKeyId(signatureKeyId);
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if (signature == null) {
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Log.d(Constants.TAG, "SIGNATURE_UNKNOWN_PUB_KEY");
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_UNKNOWN_PUB_KEY);
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returnData.setSignatureResult(signatureResult);
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result.setSignatureResult(signatureResult);
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updateProgress(R.string.progress_done, 100, 100);
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return returnData;
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return result;
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}
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JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider =
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@ -622,16 +642,21 @@ public class PgpDecryptVerify {
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boolean validKeyBinding = verifyKeyBinding(mContext, signature, signatureKey);
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boolean validSignature = signature.verify();
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if (validSignature & validKeyBinding) {
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if (validKeyBinding & validSignature) {
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Log.d(Constants.TAG, "SIGNATURE_SUCCESS_UNCERTIFIED");
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_SUCCESS_UNCERTIFIED);
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} else {
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signatureResult.setStatus(OpenPgpSignatureResult.SIGNATURE_ERROR);
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Log.e(Constants.TAG, "Error!\nvalidKeyBinding: " + validKeyBinding
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+ "\nvalidSignature: " + validSignature);
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}
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// TODO: what about SIGNATURE_SUCCESS_CERTIFIED and SIGNATURE_ERROR????
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returnData.setSignatureResult(signatureResult);
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result.setSignatureResult(signatureResult);
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updateProgress(R.string.progress_done, 100, 100);
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return returnData;
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return result;
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}
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private static boolean verifyKeyBinding(Context context,
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