diff options
Diffstat (limited to 'OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java')
| -rw-r--r-- | OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java | 1857 |
1 files changed, 1857 insertions, 0 deletions
diff --git a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java new file mode 100644 index 000000000..26842e4dc --- /dev/null +++ b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java @@ -0,0 +1,1857 @@ +/* + * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de> + * Copyright (C) 2010 Thialfihar <thi@thialfihar.org> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.sufficientlysecure.keychain.helper; + +import org.spongycastle.bcpg.ArmoredInputStream; +import org.spongycastle.bcpg.ArmoredOutputStream; +import org.spongycastle.bcpg.BCPGOutputStream; +import org.spongycastle.bcpg.CompressionAlgorithmTags; +import org.spongycastle.bcpg.HashAlgorithmTags; +import org.spongycastle.bcpg.SymmetricKeyAlgorithmTags; +import org.spongycastle.bcpg.sig.KeyFlags; +import org.spongycastle.jce.provider.BouncyCastleProvider; +import org.spongycastle.jce.spec.ElGamalParameterSpec; +import org.spongycastle.openpgp.PGPCompressedData; +import org.spongycastle.openpgp.PGPCompressedDataGenerator; +import org.spongycastle.openpgp.PGPEncryptedData; +import org.spongycastle.openpgp.PGPEncryptedDataGenerator; +import org.spongycastle.openpgp.PGPEncryptedDataList; +import org.spongycastle.openpgp.PGPException; +import org.spongycastle.openpgp.PGPKeyPair; +import org.spongycastle.openpgp.PGPKeyRing; +import org.spongycastle.openpgp.PGPKeyRingGenerator; +import org.spongycastle.openpgp.PGPLiteralData; +import org.spongycastle.openpgp.PGPLiteralDataGenerator; +import org.spongycastle.openpgp.PGPObjectFactory; +import org.spongycastle.openpgp.PGPOnePassSignature; +import org.spongycastle.openpgp.PGPOnePassSignatureList; +import org.spongycastle.openpgp.PGPPBEEncryptedData; +import org.spongycastle.openpgp.PGPPrivateKey; +import org.spongycastle.openpgp.PGPPublicKey; +import org.spongycastle.openpgp.PGPPublicKeyEncryptedData; +import org.spongycastle.openpgp.PGPPublicKeyRing; +import org.spongycastle.openpgp.PGPPublicKeyRingCollection; +import org.spongycastle.openpgp.PGPSecretKey; +import org.spongycastle.openpgp.PGPSecretKeyRing; +import org.spongycastle.openpgp.PGPSignature; +import org.spongycastle.openpgp.PGPSignatureGenerator; +import org.spongycastle.openpgp.PGPSignatureList; +import org.spongycastle.openpgp.PGPSignatureSubpacketGenerator; +import org.spongycastle.openpgp.PGPSignatureSubpacketVector; +import org.spongycastle.openpgp.PGPUtil; +import org.spongycastle.openpgp.PGPV3SignatureGenerator; +import org.spongycastle.openpgp.operator.PBEDataDecryptorFactory; +import org.spongycastle.openpgp.operator.PBESecretKeyDecryptor; +import org.spongycastle.openpgp.operator.PBESecretKeyEncryptor; +import org.spongycastle.openpgp.operator.PGPContentSignerBuilder; +import org.spongycastle.openpgp.operator.PGPDigestCalculator; +import org.spongycastle.openpgp.operator.PGPDigestCalculatorProvider; +import org.spongycastle.openpgp.operator.PublicKeyDataDecryptorFactory; +import org.spongycastle.openpgp.operator.jcajce.JcaPGPContentSignerBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider; +import org.spongycastle.openpgp.operator.jcajce.JcaPGPDigestCalculatorProviderBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcaPGPKeyPair; +import org.spongycastle.openpgp.operator.jcajce.JcePBEDataDecryptorFactoryBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcePBEKeyEncryptionMethodGenerator; +import org.spongycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcePBESecretKeyEncryptorBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcePublicKeyDataDecryptorFactoryBuilder; +import org.spongycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator; +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.Id; +import org.sufficientlysecure.keychain.provider.ProviderHelper; +import org.sufficientlysecure.keychain.service.KeychainIntentService; +import org.sufficientlysecure.keychain.util.HkpKeyServer; +import org.sufficientlysecure.keychain.util.InputData; +import org.sufficientlysecure.keychain.util.Log; +import org.sufficientlysecure.keychain.util.PositionAwareInputStream; +import org.sufficientlysecure.keychain.util.Primes; +import org.sufficientlysecure.keychain.util.ProgressDialogUpdater; +import org.sufficientlysecure.keychain.util.KeyServer.AddKeyException; +import org.sufficientlysecure.keychain.R; + +import android.content.Context; +import android.content.pm.PackageInfo; +import android.content.pm.PackageManager.NameNotFoundException; +import android.os.Bundle; +import android.os.Environment; + +import java.io.BufferedInputStream; +import java.io.BufferedReader; +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.EOFException; +import java.io.File; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.io.OutputStream; +import java.io.RandomAccessFile; +import java.math.BigInteger; +import java.security.InvalidAlgorithmParameterException; +import java.security.KeyPairGenerator; +import java.security.NoSuchAlgorithmException; +import java.security.NoSuchProviderException; +import java.security.SecureRandom; +import java.security.Security; +import java.security.SignatureException; +import java.util.ArrayList; +import java.util.Date; +import java.util.Iterator; +import java.util.regex.Pattern; + +/** + * TODO: + * + * - Separate this file into different helpers + * + */ +public class PgpMain { + + static { + // register spongy castle provider + Security.addProvider(new BouncyCastleProvider()); + } + + // Not BC due to the use of Spongy Castle for Android + public static final String BOUNCY_CASTLE_PROVIDER_NAME = "SC"; + + private static final int[] PREFERRED_SYMMETRIC_ALGORITHMS = new int[] { + SymmetricKeyAlgorithmTags.AES_256, SymmetricKeyAlgorithmTags.AES_192, + SymmetricKeyAlgorithmTags.AES_128, SymmetricKeyAlgorithmTags.CAST5, + SymmetricKeyAlgorithmTags.TRIPLE_DES }; + private static final int[] PREFERRED_HASH_ALGORITHMS = new int[] { HashAlgorithmTags.SHA1, + HashAlgorithmTags.SHA256, HashAlgorithmTags.RIPEMD160 }; + private static final int[] PREFERRED_COMPRESSION_ALGORITHMS = new int[] { + CompressionAlgorithmTags.ZLIB, CompressionAlgorithmTags.BZIP2, + CompressionAlgorithmTags.ZIP }; + + public static Pattern PGP_MESSAGE = Pattern.compile( + ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*", Pattern.DOTALL); + + public static Pattern PGP_SIGNED_MESSAGE = Pattern + .compile( + ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*", + Pattern.DOTALL); + + public static Pattern PGP_PUBLIC_KEY = Pattern.compile( + ".*?(-----BEGIN PGP PUBLIC KEY BLOCK-----.*?-----END PGP PUBLIC KEY BLOCK-----).*", + Pattern.DOTALL); + + private static String mEditPassPhrase = null; + + public static class PgpGeneralException extends Exception { + static final long serialVersionUID = 0xf812773342L; + + public PgpGeneralException(String message) { + super(message); + } + } + + public static class NoAsymmetricEncryptionException extends Exception { + static final long serialVersionUID = 0xf812773343L; + + public NoAsymmetricEncryptionException() { + super(); + } + } + + public static void setEditPassPhrase(String passPhrase) { + mEditPassPhrase = passPhrase; + } + + public static String getEditPassPhrase() { + return mEditPassPhrase; + } + + public static void updateProgress(ProgressDialogUpdater progress, int message, int current, + int total) { + if (progress != null) { + progress.setProgress(message, current, total); + } + } + + public static void updateProgress(ProgressDialogUpdater progress, int current, int total) { + if (progress != null) { + progress.setProgress(current, total); + } + } + + /** + * Creates new secret key. The returned PGPSecretKeyRing contains only one newly generated key + * when this key is the new masterkey. If a masterkey is supplied in the parameters + * PGPSecretKeyRing contains the masterkey and the new key as a subkey (certified by the + * masterkey). + * + * @param context + * @param algorithmChoice + * @param keySize + * @param passPhrase + * @param masterSecretKey + * @return + * @throws NoSuchAlgorithmException + * @throws PGPException + * @throws NoSuchProviderException + * @throws PgpGeneralException + * @throws InvalidAlgorithmParameterException + */ + public static PGPSecretKeyRing createKey(Context context, int algorithmChoice, int keySize, + String passPhrase, PGPSecretKey masterSecretKey) throws NoSuchAlgorithmException, + PGPException, NoSuchProviderException, PgpGeneralException, + InvalidAlgorithmParameterException { + + if (keySize < 512) { + throw new PgpGeneralException(context.getString(R.string.error_keySizeMinimum512bit)); + } + + if (passPhrase == null) { + passPhrase = ""; + } + + int algorithm = 0; + KeyPairGenerator keyGen = null; + + switch (algorithmChoice) { + case Id.choice.algorithm.dsa: { + keyGen = KeyPairGenerator.getInstance("DSA", BOUNCY_CASTLE_PROVIDER_NAME); + keyGen.initialize(keySize, new SecureRandom()); + algorithm = PGPPublicKey.DSA; + break; + } + + case Id.choice.algorithm.elgamal: { + if (masterSecretKey == null) { + throw new PgpGeneralException( + context.getString(R.string.error_masterKeyMustNotBeElGamal)); + } + keyGen = KeyPairGenerator.getInstance("ElGamal", BOUNCY_CASTLE_PROVIDER_NAME); + BigInteger p = Primes.getBestPrime(keySize); + BigInteger g = new BigInteger("2"); + + ElGamalParameterSpec elParams = new ElGamalParameterSpec(p, g); + + keyGen.initialize(elParams); + algorithm = PGPPublicKey.ELGAMAL_ENCRYPT; + break; + } + + case Id.choice.algorithm.rsa: { + keyGen = KeyPairGenerator.getInstance("RSA", BOUNCY_CASTLE_PROVIDER_NAME); + keyGen.initialize(keySize, new SecureRandom()); + + algorithm = PGPPublicKey.RSA_GENERAL; + break; + } + + default: { + throw new PgpGeneralException(context.getString(R.string.error_unknownAlgorithmChoice)); + } + } + + // build new key pair + PGPKeyPair keyPair = new JcaPGPKeyPair(algorithm, keyGen.generateKeyPair(), new Date()); + + // define hashing and signing algos + PGPDigestCalculator sha1Calc = new JcaPGPDigestCalculatorProviderBuilder().build().get( + HashAlgorithmTags.SHA1); + + // Build key encrypter and decrypter based on passphrase + PBESecretKeyEncryptor keyEncryptor = new JcePBESecretKeyEncryptorBuilder( + PGPEncryptedData.CAST5, sha1Calc).setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build( + passPhrase.toCharArray()); + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(passPhrase.toCharArray()); + + PGPKeyRingGenerator ringGen = null; + PGPContentSignerBuilder certificationSignerBuilder = null; + if (masterSecretKey == null) { + certificationSignerBuilder = new JcaPGPContentSignerBuilder(keyPair.getPublicKey() + .getAlgorithm(), HashAlgorithmTags.SHA1); + + // build keyRing with only this one master key in it! + ringGen = new PGPKeyRingGenerator(PGPSignature.POSITIVE_CERTIFICATION, keyPair, "", + sha1Calc, null, null, certificationSignerBuilder, keyEncryptor); + } else { + PGPPublicKey masterPublicKey = masterSecretKey.getPublicKey(); + PGPPrivateKey masterPrivateKey = masterSecretKey.extractPrivateKey(keyDecryptor); + PGPKeyPair masterKeyPair = new PGPKeyPair(masterPublicKey, masterPrivateKey); + + certificationSignerBuilder = new JcaPGPContentSignerBuilder(masterKeyPair + .getPublicKey().getAlgorithm(), HashAlgorithmTags.SHA1); + + // build keyRing with master key and new key as subkey (certified by masterkey) + ringGen = new PGPKeyRingGenerator(PGPSignature.POSITIVE_CERTIFICATION, masterKeyPair, + "", sha1Calc, null, null, certificationSignerBuilder, keyEncryptor); + + ringGen.addSubKey(keyPair); + } + + PGPSecretKeyRing secKeyRing = ringGen.generateSecretKeyRing(); + + return secKeyRing; + } + + public static void buildSecretKey(Context context, ArrayList<String> userIds, + ArrayList<PGPSecretKey> keys, ArrayList<Integer> keysUsages, long masterKeyId, + String oldPassPhrase, String newPassPhrase, ProgressDialogUpdater progress) + throws PgpGeneralException, NoSuchProviderException, PGPException, + NoSuchAlgorithmException, SignatureException, IOException { + + Log.d(Constants.TAG, "userIds: " + userIds.toString()); + + updateProgress(progress, R.string.progress_buildingKey, 0, 100); + + if (oldPassPhrase == null) { + oldPassPhrase = ""; + } + if (newPassPhrase == null) { + newPassPhrase = ""; + } + + updateProgress(progress, R.string.progress_preparingMasterKey, 10, 100); + + int usageId = keysUsages.get(0); + boolean canSign = (usageId == Id.choice.usage.sign_only || usageId == Id.choice.usage.sign_and_encrypt); + boolean canEncrypt = (usageId == Id.choice.usage.encrypt_only || usageId == Id.choice.usage.sign_and_encrypt); + + String mainUserId = userIds.get(0); + + PGPSecretKey masterKey = keys.get(0); + + // this removes all userIds and certifications previously attached to the masterPublicKey + PGPPublicKey tmpKey = masterKey.getPublicKey(); + PGPPublicKey masterPublicKey = new PGPPublicKey(tmpKey.getAlgorithm(), + tmpKey.getKey(new BouncyCastleProvider()), tmpKey.getCreationTime()); + + // already done by code above: + // PGPPublicKey masterPublicKey = masterKey.getPublicKey(); + // // Somehow, the PGPPublicKey already has an empty certification attached to it when the + // // keyRing is generated the first time, we remove that when it exists, before adding the + // new + // // ones + // PGPPublicKey masterPublicKeyRmCert = PGPPublicKey.removeCertification(masterPublicKey, + // ""); + // if (masterPublicKeyRmCert != null) { + // masterPublicKey = masterPublicKeyRmCert; + // } + + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(oldPassPhrase.toCharArray()); + PGPPrivateKey masterPrivateKey = masterKey.extractPrivateKey(keyDecryptor); + + updateProgress(progress, R.string.progress_certifyingMasterKey, 20, 100); + + for (String userId : userIds) { + PGPContentSignerBuilder signerBuilder = new JcaPGPContentSignerBuilder( + masterPublicKey.getAlgorithm(), HashAlgorithmTags.SHA1) + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + PGPSignatureGenerator sGen = new PGPSignatureGenerator(signerBuilder); + + sGen.init(PGPSignature.POSITIVE_CERTIFICATION, masterPrivateKey); + + PGPSignature certification = sGen.generateCertification(userId, masterPublicKey); + + masterPublicKey = PGPPublicKey.addCertification(masterPublicKey, userId, certification); + } + + // TODO: cross-certify the master key with every sub key (APG 1) + + PGPKeyPair masterKeyPair = new PGPKeyPair(masterPublicKey, masterPrivateKey); + + PGPSignatureSubpacketGenerator hashedPacketsGen = new PGPSignatureSubpacketGenerator(); + PGPSignatureSubpacketGenerator unhashedPacketsGen = new PGPSignatureSubpacketGenerator(); + + int keyFlags = KeyFlags.CERTIFY_OTHER | KeyFlags.SIGN_DATA; + if (canEncrypt) { + keyFlags |= KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE; + } + hashedPacketsGen.setKeyFlags(true, keyFlags); + + hashedPacketsGen.setPreferredSymmetricAlgorithms(true, PREFERRED_SYMMETRIC_ALGORITHMS); + hashedPacketsGen.setPreferredHashAlgorithms(true, PREFERRED_HASH_ALGORITHMS); + hashedPacketsGen.setPreferredCompressionAlgorithms(true, PREFERRED_COMPRESSION_ALGORITHMS); + + // TODO: this doesn't work quite right yet (APG 1) + // if (keyEditor.getExpiryDate() != null) { + // GregorianCalendar creationDate = new GregorianCalendar(); + // creationDate.setTime(getCreationDate(masterKey)); + // GregorianCalendar expiryDate = keyEditor.getExpiryDate(); + // long numDays = Utils.getNumDaysBetween(creationDate, expiryDate); + // if (numDays <= 0) { + // throw new GeneralException( + // context.getString(R.string.error_expiryMustComeAfterCreation)); + // } + // hashedPacketsGen.setKeyExpirationTime(true, numDays * 86400); + // } + + updateProgress(progress, R.string.progress_buildingMasterKeyRing, 30, 100); + + // define hashing and signing algos + PGPDigestCalculator sha1Calc = new JcaPGPDigestCalculatorProviderBuilder().build().get( + HashAlgorithmTags.SHA1); + PGPContentSignerBuilder certificationSignerBuilder = new JcaPGPContentSignerBuilder( + masterKeyPair.getPublicKey().getAlgorithm(), HashAlgorithmTags.SHA1); + + // Build key encrypter based on passphrase + PBESecretKeyEncryptor keyEncryptor = new JcePBESecretKeyEncryptorBuilder( + PGPEncryptedData.CAST5, sha1Calc).setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build( + newPassPhrase.toCharArray()); + + PGPKeyRingGenerator keyGen = new PGPKeyRingGenerator(PGPSignature.POSITIVE_CERTIFICATION, + masterKeyPair, mainUserId, sha1Calc, hashedPacketsGen.generate(), + unhashedPacketsGen.generate(), certificationSignerBuilder, keyEncryptor); + + updateProgress(progress, R.string.progress_addingSubKeys, 40, 100); + + for (int i = 1; i < keys.size(); ++i) { + updateProgress(progress, 40 + 50 * (i - 1) / (keys.size() - 1), 100); + + PGPSecretKey subKey = keys.get(i); + PGPPublicKey subPublicKey = subKey.getPublicKey(); + + PBESecretKeyDecryptor keyDecryptor2 = new JcePBESecretKeyDecryptorBuilder() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build(oldPassPhrase.toCharArray()); + PGPPrivateKey subPrivateKey = subKey.extractPrivateKey(keyDecryptor2); + + // TODO: now used without algorithm and creation time?! (APG 1) + PGPKeyPair subKeyPair = new PGPKeyPair(subPublicKey, subPrivateKey); + + hashedPacketsGen = new PGPSignatureSubpacketGenerator(); + unhashedPacketsGen = new PGPSignatureSubpacketGenerator(); + + keyFlags = 0; + + usageId = keysUsages.get(i); + canSign = (usageId == Id.choice.usage.sign_only || usageId == Id.choice.usage.sign_and_encrypt); + canEncrypt = (usageId == Id.choice.usage.encrypt_only || usageId == Id.choice.usage.sign_and_encrypt); + if (canSign) { + keyFlags |= KeyFlags.SIGN_DATA; + } + if (canEncrypt) { + keyFlags |= KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE; + } + hashedPacketsGen.setKeyFlags(true, keyFlags); + + // TODO: this doesn't work quite right yet (APG 1) + // if (keyEditor.getExpiryDate() != null) { + // GregorianCalendar creationDate = new GregorianCalendar(); + // creationDate.setTime(getCreationDate(masterKey)); + // GregorianCalendar expiryDate = keyEditor.getExpiryDate(); + // long numDays = Utils.getNumDaysBetween(creationDate, expiryDate); + // if (numDays <= 0) { + // throw new GeneralException( + // context.getString(R.string.error_expiryMustComeAfterCreation)); + // } + // hashedPacketsGen.setKeyExpirationTime(true, numDays * 86400); + // } + + keyGen.addSubKey(subKeyPair, hashedPacketsGen.generate(), unhashedPacketsGen.generate()); + } + + PGPSecretKeyRing secretKeyRing = keyGen.generateSecretKeyRing(); + PGPPublicKeyRing publicKeyRing = keyGen.generatePublicKeyRing(); + + updateProgress(progress, R.string.progress_savingKeyRing, 90, 100); + + ProviderHelper.saveKeyRing(context, secretKeyRing); + ProviderHelper.saveKeyRing(context, publicKeyRing); + + updateProgress(progress, R.string.progress_done, 100, 100); + } + + /** + * TODO: implement Id.return_value.updated as status when key already existed + * + * @param context + * @param keyring + * @return + */ + public static int storeKeyRingInCache(Context context, PGPKeyRing keyring) { + int status = Integer.MIN_VALUE; // out of bounds value (Id.return_value.*) + try { + if (keyring instanceof PGPSecretKeyRing) { + PGPSecretKeyRing secretKeyRing = (PGPSecretKeyRing) keyring; + boolean save = true; + try { + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build(new char[] {}); + PGPPrivateKey testKey = secretKeyRing.getSecretKey().extractPrivateKey( + keyDecryptor); + if (testKey == null) { + // this is bad, something is very wrong... likely a --export-secret-subkeys + // export + save = false; + status = Id.return_value.bad; + } + } catch (PGPException e) { + // all good if this fails, we likely didn't use the right password + } + + if (save) { + ProviderHelper.saveKeyRing(context, secretKeyRing); + // TODO: remove status returns, use exceptions! + status = Id.return_value.ok; + } + } else if (keyring instanceof PGPPublicKeyRing) { + PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) keyring; + ProviderHelper.saveKeyRing(context, publicKeyRing); + // TODO: remove status returns, use exceptions! + status = Id.return_value.ok; + } + } catch (IOException e) { + status = Id.return_value.error; + } + + return status; + } + + public static boolean uploadKeyRingToServer(HkpKeyServer server, PGPPublicKeyRing keyring) { + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + ArmoredOutputStream aos = new ArmoredOutputStream(bos); + try { + aos.write(keyring.getEncoded()); + aos.close(); + + String armouredKey = bos.toString("UTF-8"); + server.add(armouredKey); + + return true; + } catch (IOException e) { + return false; + } catch (AddKeyException e) { + // TODO: tell the user? + return false; + } finally { + try { + bos.close(); + } catch (IOException e) { + } + } + } + + public static Bundle importKeyRings(Context context, InputData data, + ProgressDialogUpdater progress) throws PgpGeneralException, FileNotFoundException, + PGPException, IOException { + Bundle returnData = new Bundle(); + + updateProgress(progress, R.string.progress_importingSecretKeys, 0, 100); + + if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { + throw new PgpGeneralException(context.getString(R.string.error_externalStorageNotReady)); + } + + PositionAwareInputStream progressIn = new PositionAwareInputStream(data.getInputStream()); + + // need to have access to the bufferedInput, so we can reuse it for the possible + // PGPObject chunks after the first one, e.g. files with several consecutive ASCII + // armour blocks + BufferedInputStream bufferedInput = new BufferedInputStream(progressIn); + int newKeys = 0; + int oldKeys = 0; + int badKeys = 0; + try { + + // read all available blocks... (asc files can contain many blocks with BEGIN END) + while (bufferedInput.available() > 0) { + InputStream in = PGPUtil.getDecoderStream(bufferedInput); + PGPObjectFactory objectFactory = new PGPObjectFactory(in); + + // go through all objects in this block + Object obj; + while ((obj = objectFactory.nextObject()) != null) { + Log.d(Constants.TAG, "Found class: " + obj.getClass()); + + if (obj instanceof PGPKeyRing) { + PGPKeyRing keyring = (PGPKeyRing) obj; + + int status = Integer.MIN_VALUE; // out of bounds value + + status = storeKeyRingInCache(context, keyring); + + if (status == Id.return_value.error) { + throw new PgpGeneralException( + context.getString(R.string.error_savingKeys)); + } + + // update the counts to display to the user at the end + if (status == Id.return_value.updated) { + ++oldKeys; + } else if (status == Id.return_value.ok) { + ++newKeys; + } else if (status == Id.return_value.bad) { + ++badKeys; + } + + updateProgress(progress, + (int) (100 * progressIn.position() / data.getSize()), 100); + } else { + Log.e(Constants.TAG, "Object not recognized as PGPKeyRing!"); + } + } + } + } catch (Exception e) { + Log.e(Constants.TAG, "Exception on parsing key file!", e); + } + + returnData.putInt(KeychainIntentService.RESULT_IMPORT_ADDED, newKeys); + returnData.putInt(KeychainIntentService.RESULT_IMPORT_UPDATED, oldKeys); + returnData.putInt(KeychainIntentService.RESULT_IMPORT_BAD, badKeys); + + updateProgress(progress, R.string.progress_done, 100, 100); + + return returnData; + } + + public static Bundle exportKeyRings(Context context, ArrayList<Long> keyRingMasterKeyIds, + int keyType, OutputStream outStream, ProgressDialogUpdater progress) + throws PgpGeneralException, FileNotFoundException, PGPException, IOException { + Bundle returnData = new Bundle(); + + if (keyRingMasterKeyIds.size() == 1) { + updateProgress(progress, R.string.progress_exportingKey, 0, 100); + } else { + updateProgress(progress, R.string.progress_exportingKeys, 0, 100); + } + + if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { + throw new PgpGeneralException(context.getString(R.string.error_externalStorageNotReady)); + } + + // export public keyrings... + ArmoredOutputStream outPub = new ArmoredOutputStream(outStream); + outPub.setHeader("Version", getFullVersion(context)); + + int numKeys = 0; + for (int i = 0; i < keyRingMasterKeyIds.size(); ++i) { + // double the needed time if exporting both public and secret parts + if (keyType == Id.type.secret_key) { + updateProgress(progress, i * 100 / keyRingMasterKeyIds.size() / 2, 100); + } else { + updateProgress(progress, i * 100 / keyRingMasterKeyIds.size(), 100); + } + + PGPPublicKeyRing publicKeyRing = ProviderHelper.getPGPPublicKeyRingByMasterKeyId( + context, keyRingMasterKeyIds.get(i)); + + if (publicKeyRing != null) { + publicKeyRing.encode(outPub); + } + ++numKeys; + } + outPub.close(); + + // if we export secret keyrings, append all secret parts after the public parts + if (keyType == Id.type.secret_key) { + ArmoredOutputStream outSec = new ArmoredOutputStream(outStream); + outSec.setHeader("Version", getFullVersion(context)); + + for (int i = 0; i < keyRingMasterKeyIds.size(); ++i) { + updateProgress(progress, i * 100 / keyRingMasterKeyIds.size() / 2, 100); + + PGPSecretKeyRing secretKeyRing = ProviderHelper.getPGPSecretKeyRingByMasterKeyId( + context, keyRingMasterKeyIds.get(i)); + + if (secretKeyRing != null) { + secretKeyRing.encode(outSec); + } + } + outSec.close(); + } + + returnData.putInt(KeychainIntentService.RESULT_EXPORT, numKeys); + + updateProgress(progress, R.string.progress_done, 100, 100); + + return returnData; + } + + /** + * Encrypt and Sign data + * + * @param context + * @param progress + * @param data + * @param outStream + * @param useAsciiArmor + * @param compression + * @param encryptionKeyIds + * @param symmetricEncryptionAlgorithm + * @param encryptionPassphrase + * @param signatureKeyId + * @param signatureHashAlgorithm + * @param signatureForceV3 + * @param signaturePassphrase + * @throws IOException + * @throws PgpGeneralException + * @throws PGPException + * @throws NoSuchProviderException + * @throws NoSuchAlgorithmException + * @throws SignatureException + */ + public static void encryptAndSign(Context context, ProgressDialogUpdater progress, + InputData data, OutputStream outStream, boolean useAsciiArmor, int compression, + long encryptionKeyIds[], String encryptionPassphrase, int symmetricEncryptionAlgorithm, + long signatureKeyId, int signatureHashAlgorithm, boolean signatureForceV3, + String signaturePassphrase) throws IOException, PgpGeneralException, PGPException, + NoSuchProviderException, NoSuchAlgorithmException, SignatureException { + + if (encryptionKeyIds == null) { + encryptionKeyIds = new long[0]; + } + + ArmoredOutputStream armorOut = null; + OutputStream out = null; + OutputStream encryptOut = null; + if (useAsciiArmor) { + armorOut = new ArmoredOutputStream(outStream); + armorOut.setHeader("Version", getFullVersion(context)); + out = armorOut; + } else { + out = outStream; + } + PGPSecretKey signingKey = null; + PGPSecretKeyRing signingKeyRing = null; + PGPPrivateKey signaturePrivateKey = null; + + if (encryptionKeyIds.length == 0 && encryptionPassphrase == null) { + throw new PgpGeneralException( + context.getString(R.string.error_noEncryptionKeysOrPassPhrase)); + } + + if (signatureKeyId != Id.key.none) { + signingKeyRing = ProviderHelper.getPGPSecretKeyRingByKeyId(context, signatureKeyId); + signingKey = PgpHelper.getSigningKey(context, signatureKeyId); + if (signingKey == null) { + throw new PgpGeneralException(context.getString(R.string.error_signatureFailed)); + } + + if (signaturePassphrase == null) { + throw new PgpGeneralException( + context.getString(R.string.error_noSignaturePassPhrase)); + } + + updateProgress(progress, R.string.progress_extractingSignatureKey, 0, 100); + + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(signaturePassphrase.toCharArray()); + signaturePrivateKey = signingKey.extractPrivateKey(keyDecryptor); + if (signaturePrivateKey == null) { + throw new PgpGeneralException( + context.getString(R.string.error_couldNotExtractPrivateKey)); + } + } + updateProgress(progress, R.string.progress_preparingStreams, 5, 100); + + // encrypt and compress input file content + JcePGPDataEncryptorBuilder encryptorBuilder = new JcePGPDataEncryptorBuilder( + symmetricEncryptionAlgorithm).setProvider(BOUNCY_CASTLE_PROVIDER_NAME) + .setWithIntegrityPacket(true); + + PGPEncryptedDataGenerator cPk = new PGPEncryptedDataGenerator(encryptorBuilder); + + if (encryptionKeyIds.length == 0) { + // Symmetric encryption + Log.d(Constants.TAG, "encryptionKeyIds length is 0 -> symmetric encryption"); + + JcePBEKeyEncryptionMethodGenerator symmetricEncryptionGenerator = new JcePBEKeyEncryptionMethodGenerator( + encryptionPassphrase.toCharArray()); + cPk.addMethod(symmetricEncryptionGenerator); + } else { + // Asymmetric encryption + for (int i = 0; i < encryptionKeyIds.length; ++i) { + PGPPublicKey key = PgpHelper.getEncryptPublicKey(context, encryptionKeyIds[i]); + if (key != null) { + + JcePublicKeyKeyEncryptionMethodGenerator pubKeyEncryptionGenerator = new JcePublicKeyKeyEncryptionMethodGenerator( + key); + cPk.addMethod(pubKeyEncryptionGenerator); + } + } + } + encryptOut = cPk.open(out, new byte[1 << 16]); + + PGPSignatureGenerator signatureGenerator = null; + PGPV3SignatureGenerator signatureV3Generator = null; + + if (signatureKeyId != Id.key.none) { + updateProgress(progress, R.string.progress_preparingSignature, 10, 100); + + // content signer based on signing key algorithm and choosen hash algorithm + JcaPGPContentSignerBuilder contentSignerBuilder = new JcaPGPContentSignerBuilder( + signingKey.getPublicKey().getAlgorithm(), signatureHashAlgorithm) + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + if (signatureForceV3) { + signatureV3Generator = new PGPV3SignatureGenerator(contentSignerBuilder); + signatureV3Generator.init(PGPSignature.BINARY_DOCUMENT, signaturePrivateKey); + } else { + signatureGenerator = new PGPSignatureGenerator(contentSignerBuilder); + signatureGenerator.init(PGPSignature.BINARY_DOCUMENT, signaturePrivateKey); + + String userId = PgpHelper.getMainUserId(PgpHelper.getMasterKey(signingKeyRing)); + PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator(); + spGen.setSignerUserID(false, userId); + signatureGenerator.setHashedSubpackets(spGen.generate()); + } + } + + PGPCompressedDataGenerator compressGen = null; + BCPGOutputStream bcpgOut = null; + if (compression == Id.choice.compression.none) { + bcpgOut = new BCPGOutputStream(encryptOut); + } else { + compressGen = new PGPCompressedDataGenerator(compression); + bcpgOut = new BCPGOutputStream(compressGen.open(encryptOut)); + } + if (signatureKeyId != Id.key.none) { + if (signatureForceV3) { + signatureV3Generator.generateOnePassVersion(false).encode(bcpgOut); + } else { + signatureGenerator.generateOnePassVersion(false).encode(bcpgOut); + } + } + + PGPLiteralDataGenerator literalGen = new PGPLiteralDataGenerator(); + // file name not needed, so empty string + OutputStream pOut = literalGen.open(bcpgOut, PGPLiteralData.BINARY, "", new Date(), + new byte[1 << 16]); + updateProgress(progress, R.string.progress_encrypting, 20, 100); + + long done = 0; + int n = 0; + byte[] buffer = new byte[1 << 16]; + InputStream in = data.getInputStream(); + while ((n = in.read(buffer)) > 0) { + pOut.write(buffer, 0, n); + if (signatureKeyId != Id.key.none) { + if (signatureForceV3) { + signatureV3Generator.update(buffer, 0, n); + } else { + signatureGenerator.update(buffer, 0, n); + } + } + done += n; + if (data.getSize() != 0) { + updateProgress(progress, (int) (20 + (95 - 20) * done / data.getSize()), 100); + } + } + + literalGen.close(); + + if (signatureKeyId != Id.key.none) { + updateProgress(progress, R.string.progress_generatingSignature, 95, 100); + if (signatureForceV3) { + signatureV3Generator.generate().encode(pOut); + } else { + signatureGenerator.generate().encode(pOut); + } + } + if (compressGen != null) { + compressGen.close(); + } + encryptOut.close(); + if (useAsciiArmor) { + armorOut.close(); + } + + updateProgress(progress, R.string.progress_done, 100, 100); + } + + public static void signText(Context context, ProgressDialogUpdater progress, InputData data, + OutputStream outStream, long signatureKeyId, String signaturePassphrase, + int signatureHashAlgorithm, boolean forceV3Signature) throws PgpGeneralException, + PGPException, IOException, NoSuchAlgorithmException, SignatureException { + + ArmoredOutputStream armorOut = new ArmoredOutputStream(outStream); + armorOut.setHeader("Version", getFullVersion(context)); + + PGPSecretKey signingKey = null; + PGPSecretKeyRing signingKeyRing = null; + PGPPrivateKey signaturePrivateKey = null; + + if (signatureKeyId == 0) { + armorOut.close(); + throw new PgpGeneralException(context.getString(R.string.error_noSignatureKey)); + } + + signingKeyRing = ProviderHelper.getPGPSecretKeyRingByKeyId(context, signatureKeyId); + signingKey = PgpHelper.getSigningKey(context, signatureKeyId); + if (signingKey == null) { + armorOut.close(); + throw new PgpGeneralException(context.getString(R.string.error_signatureFailed)); + } + + if (signaturePassphrase == null) { + armorOut.close(); + throw new PgpGeneralException(context.getString(R.string.error_noSignaturePassPhrase)); + } + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(signaturePassphrase.toCharArray()); + signaturePrivateKey = signingKey.extractPrivateKey(keyDecryptor); + if (signaturePrivateKey == null) { + armorOut.close(); + throw new PgpGeneralException( + context.getString(R.string.error_couldNotExtractPrivateKey)); + } + updateProgress(progress, R.string.progress_preparingStreams, 0, 100); + + updateProgress(progress, R.string.progress_preparingSignature, 30, 100); + + PGPSignatureGenerator signatureGenerator = null; + PGPV3SignatureGenerator signatureV3Generator = null; + + // content signer based on signing key algorithm and choosen hash algorithm + JcaPGPContentSignerBuilder contentSignerBuilder = new JcaPGPContentSignerBuilder(signingKey + .getPublicKey().getAlgorithm(), signatureHashAlgorithm) + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + if (forceV3Signature) { + signatureV3Generator = new PGPV3SignatureGenerator(contentSignerBuilder); + signatureV3Generator.init(PGPSignature.CANONICAL_TEXT_DOCUMENT, signaturePrivateKey); + } else { + signatureGenerator = new PGPSignatureGenerator(contentSignerBuilder); + signatureGenerator.init(PGPSignature.CANONICAL_TEXT_DOCUMENT, signaturePrivateKey); + + PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator(); + String userId = PgpHelper.getMainUserId(PgpHelper.getMasterKey(signingKeyRing)); + spGen.setSignerUserID(false, userId); + signatureGenerator.setHashedSubpackets(spGen.generate()); + } + + updateProgress(progress, R.string.progress_signing, 40, 100); + + armorOut.beginClearText(signatureHashAlgorithm); + + InputStream inStream = data.getInputStream(); + final BufferedReader reader = new BufferedReader(new InputStreamReader(inStream)); + + final byte[] newline = "\r\n".getBytes("UTF-8"); + + if (forceV3Signature) { + processLine(reader.readLine(), armorOut, signatureV3Generator); + } else { + processLine(reader.readLine(), armorOut, signatureGenerator); + } + + while (true) { + final String line = reader.readLine(); + + if (line == null) { + armorOut.write(newline); + break; + } + + armorOut.write(newline); + if (forceV3Signature) { + signatureV3Generator.update(newline); + processLine(line, armorOut, signatureV3Generator); + } else { + signatureGenerator.update(newline); + processLine(line, armorOut, signatureGenerator); + } + } + + armorOut.endClearText(); + + BCPGOutputStream bOut = new BCPGOutputStream(armorOut); + if (forceV3Signature) { + signatureV3Generator.generate().encode(bOut); + } else { + signatureGenerator.generate().encode(bOut); + } + armorOut.close(); + + updateProgress(progress, R.string.progress_done, 100, 100); + } + + public static void generateSignature(Context context, ProgressDialogUpdater progress, + InputData data, OutputStream outStream, boolean armored, boolean binary, + long signatureKeyId, String signaturePassPhrase, int hashAlgorithm, + boolean forceV3Signature) throws PgpGeneralException, PGPException, IOException, + NoSuchAlgorithmException, SignatureException { + + OutputStream out = null; + + // Ascii Armor (Base64) + ArmoredOutputStream armorOut = null; + if (armored) { + armorOut = new ArmoredOutputStream(outStream); + armorOut.setHeader("Version", getFullVersion(context)); + out = armorOut; + } else { + out = outStream; + } + + PGPSecretKey signingKey = null; + PGPSecretKeyRing signingKeyRing = null; + PGPPrivateKey signaturePrivateKey = null; + + if (signatureKeyId == 0) { + throw new PgpGeneralException(context.getString(R.string.error_noSignatureKey)); + } + + signingKeyRing = ProviderHelper.getPGPSecretKeyRingByKeyId(context, signatureKeyId); + signingKey = PgpHelper.getSigningKey(context, signatureKeyId); + if (signingKey == null) { + throw new PgpGeneralException(context.getString(R.string.error_signatureFailed)); + } + + if (signaturePassPhrase == null) { + throw new PgpGeneralException(context.getString(R.string.error_noSignaturePassPhrase)); + } + + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(signaturePassPhrase.toCharArray()); + signaturePrivateKey = signingKey.extractPrivateKey(keyDecryptor); + if (signaturePrivateKey == null) { + throw new PgpGeneralException( + context.getString(R.string.error_couldNotExtractPrivateKey)); + } + updateProgress(progress, R.string.progress_preparingStreams, 0, 100); + + updateProgress(progress, R.string.progress_preparingSignature, 30, 100); + + PGPSignatureGenerator signatureGenerator = null; + PGPV3SignatureGenerator signatureV3Generator = null; + + int type = PGPSignature.CANONICAL_TEXT_DOCUMENT; + if (binary) { + type = PGPSignature.BINARY_DOCUMENT; + } + + // content signer based on signing key algorithm and choosen hash algorithm + JcaPGPContentSignerBuilder contentSignerBuilder = new JcaPGPContentSignerBuilder(signingKey + .getPublicKey().getAlgorithm(), hashAlgorithm) + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + if (forceV3Signature) { + signatureV3Generator = new PGPV3SignatureGenerator(contentSignerBuilder); + signatureV3Generator.init(type, signaturePrivateKey); + } else { + signatureGenerator = new PGPSignatureGenerator(contentSignerBuilder); + signatureGenerator.init(type, signaturePrivateKey); + + PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator(); + String userId = PgpHelper.getMainUserId(PgpHelper.getMasterKey(signingKeyRing)); + spGen.setSignerUserID(false, userId); + signatureGenerator.setHashedSubpackets(spGen.generate()); + } + + updateProgress(progress, R.string.progress_signing, 40, 100); + + InputStream inStream = data.getInputStream(); + if (binary) { + byte[] buffer = new byte[1 << 16]; + int n = 0; + while ((n = inStream.read(buffer)) > 0) { + if (forceV3Signature) { + signatureV3Generator.update(buffer, 0, n); + } else { + signatureGenerator.update(buffer, 0, n); + } + } + } else { + final BufferedReader reader = new BufferedReader(new InputStreamReader(inStream)); + final byte[] newline = "\r\n".getBytes("UTF-8"); + + while (true) { + final String line = reader.readLine(); + + if (line == null) { + break; + } + + if (forceV3Signature) { + processLine(line, null, signatureV3Generator); + signatureV3Generator.update(newline); + } else { + processLine(line, null, signatureGenerator); + signatureGenerator.update(newline); + } + } + } + + BCPGOutputStream bOut = new BCPGOutputStream(out); + if (forceV3Signature) { + signatureV3Generator.generate().encode(bOut); + } else { + signatureGenerator.generate().encode(bOut); + } + out.close(); + outStream.close(); + + if (progress != null) + progress.setProgress(R.string.progress_done, 100, 100); + } + + public static PGPPublicKeyRing signKey(Context context, long masterKeyId, long pubKeyId, + String passphrase) throws PgpGeneralException, NoSuchAlgorithmException, + NoSuchProviderException, PGPException, SignatureException { + if (passphrase == null || passphrase.length() <= 0) { + throw new PgpGeneralException("Unable to obtain passphrase"); + } else { + PGPPublicKeyRing pubring = ProviderHelper.getPGPPublicKeyRingByKeyId(context, pubKeyId); + + PGPSecretKey signingKey = PgpHelper.getSigningKey(context, masterKeyId); + if (signingKey == null) { + throw new PgpGeneralException(context.getString(R.string.error_signatureFailed)); + } + + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + BOUNCY_CASTLE_PROVIDER_NAME).build(passphrase.toCharArray()); + PGPPrivateKey signaturePrivateKey = signingKey.extractPrivateKey(keyDecryptor); + if (signaturePrivateKey == null) { + throw new PgpGeneralException( + context.getString(R.string.error_couldNotExtractPrivateKey)); + } + + // TODO: SHA256 fixed? + JcaPGPContentSignerBuilder contentSignerBuilder = new JcaPGPContentSignerBuilder( + signingKey.getPublicKey().getAlgorithm(), PGPUtil.SHA256) + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator( + contentSignerBuilder); + + signatureGenerator.init(PGPSignature.DIRECT_KEY, signaturePrivateKey); + + PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator(); + + PGPSignatureSubpacketVector packetVector = spGen.generate(); + signatureGenerator.setHashedSubpackets(packetVector); + + PGPPublicKey signedKey = PGPPublicKey.addCertification(pubring.getPublicKey(pubKeyId), + signatureGenerator.generate()); + pubring = PGPPublicKeyRing.insertPublicKey(pubring, signedKey); + + return pubring; + } + } + + public static long getDecryptionKeyId(Context context, InputStream inputStream) + throws PgpGeneralException, NoAsymmetricEncryptionException, IOException { + InputStream in = PGPUtil.getDecoderStream(inputStream); + PGPObjectFactory pgpF = new PGPObjectFactory(in); + PGPEncryptedDataList enc; + Object o = pgpF.nextObject(); + + // the first object might be a PGP marker packet. + if (o instanceof PGPEncryptedDataList) { + enc = (PGPEncryptedDataList) o; + } else { + enc = (PGPEncryptedDataList) pgpF.nextObject(); + } + + if (enc == null) { + throw new PgpGeneralException(context.getString(R.string.error_invalidData)); + } + + // TODO: currently we always only look at the first known key + // find the secret key + PGPSecretKey secretKey = null; + Iterator<?> it = enc.getEncryptedDataObjects(); + boolean gotAsymmetricEncryption = false; + while (it.hasNext()) { + Object obj = it.next(); + if (obj instanceof PGPPublicKeyEncryptedData) { + gotAsymmetricEncryption = true; + PGPPublicKeyEncryptedData pbe = (PGPPublicKeyEncryptedData) obj; + secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, pbe.getKeyID()); + if (secretKey != null) { + break; + } + } + } + + if (!gotAsymmetricEncryption) { + throw new NoAsymmetricEncryptionException(); + } + + if (secretKey == null) { + return Id.key.none; + } + + return secretKey.getKeyID(); + } + + public static boolean hasSymmetricEncryption(Context context, InputStream inputStream) + throws PgpGeneralException, IOException { + InputStream in = PGPUtil.getDecoderStream(inputStream); + PGPObjectFactory pgpF = new PGPObjectFactory(in); + PGPEncryptedDataList enc; + Object o = pgpF.nextObject(); + + // the first object might be a PGP marker packet. + if (o instanceof PGPEncryptedDataList) { + enc = (PGPEncryptedDataList) o; + } else { + enc = (PGPEncryptedDataList) pgpF.nextObject(); + } + + if (enc == null) { + throw new PgpGeneralException(context.getString(R.string.error_invalidData)); + } + + Iterator<?> it = enc.getEncryptedDataObjects(); + while (it.hasNext()) { + Object obj = it.next(); + if (obj instanceof PGPPBEEncryptedData) { + return true; + } + } + + return false; + } + + public static Bundle decryptAndVerify(Context context, ProgressDialogUpdater progress, + InputData data, OutputStream outStream, String passphrase, boolean assumeSymmetric) + throws IOException, PgpGeneralException, PGPException, SignatureException { + if (passphrase == null) { + passphrase = ""; + } + + Bundle returnData = new Bundle(); + InputStream in = PGPUtil.getDecoderStream(data.getInputStream()); + PGPObjectFactory pgpF = new PGPObjectFactory(in); + PGPEncryptedDataList enc; + Object o = pgpF.nextObject(); + long signatureKeyId = 0; + + int currentProgress = 0; + if (progress != null) + progress.setProgress(R.string.progress_readingData, currentProgress, 100); + + if (o instanceof PGPEncryptedDataList) { + enc = (PGPEncryptedDataList) o; + } else { + enc = (PGPEncryptedDataList) pgpF.nextObject(); + } + + if (enc == null) { + throw new PgpGeneralException(context.getString(R.string.error_invalidData)); + } + + InputStream clear = null; + PGPEncryptedData encryptedData = null; + + currentProgress += 5; + + // TODO: currently we always only look at the first known key or symmetric encryption, + // there might be more... + if (assumeSymmetric) { + PGPPBEEncryptedData pbe = null; + Iterator<?> it = enc.getEncryptedDataObjects(); + // find secret key + while (it.hasNext()) { + Object obj = it.next(); + if (obj instanceof PGPPBEEncryptedData) { + pbe = (PGPPBEEncryptedData) obj; + break; + } + } + + if (pbe == null) { + throw new PgpGeneralException( + context.getString(R.string.error_noSymmetricEncryptionPacket)); + } + + updateProgress(progress, R.string.progress_preparingStreams, currentProgress, 100); + + PGPDigestCalculatorProvider digestCalcProvider = new JcaPGPDigestCalculatorProviderBuilder() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build(); + PBEDataDecryptorFactory decryptorFactory = new JcePBEDataDecryptorFactoryBuilder( + digestCalcProvider).setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build( + passphrase.toCharArray()); + + clear = pbe.getDataStream(decryptorFactory); + + encryptedData = pbe; + currentProgress += 5; + } else { + if (progress != null) + progress.setProgress(R.string.progress_findingKey, currentProgress, 100); + PGPPublicKeyEncryptedData pbe = null; + PGPSecretKey secretKey = null; + Iterator<?> it = enc.getEncryptedDataObjects(); + // find secret key + while (it.hasNext()) { + Object obj = it.next(); + if (obj instanceof PGPPublicKeyEncryptedData) { + PGPPublicKeyEncryptedData encData = (PGPPublicKeyEncryptedData) obj; + secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, encData.getKeyID()); + if (secretKey != null) { + pbe = encData; + break; + } + } + } + + if (secretKey == null) { + throw new PgpGeneralException(context.getString(R.string.error_noSecretKeyFound)); + } + + currentProgress += 5; + updateProgress(progress, R.string.progress_extractingKey, currentProgress, 100); + PGPPrivateKey privateKey = null; + try { + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build(passphrase.toCharArray()); + privateKey = secretKey.extractPrivateKey(keyDecryptor); + } catch (PGPException e) { + throw new PGPException(context.getString(R.string.error_wrongPassPhrase)); + } + if (privateKey == null) { + throw new PgpGeneralException( + context.getString(R.string.error_couldNotExtractPrivateKey)); + } + currentProgress += 5; + updateProgress(progress, R.string.progress_preparingStreams, currentProgress, 100); + + PublicKeyDataDecryptorFactory decryptorFactory = new JcePublicKeyDataDecryptorFactoryBuilder() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME).build(privateKey); + + clear = pbe.getDataStream(decryptorFactory); + + encryptedData = pbe; + currentProgress += 5; + } + + PGPObjectFactory plainFact = new PGPObjectFactory(clear); + Object dataChunk = plainFact.nextObject(); + PGPOnePassSignature signature = null; + PGPPublicKey signatureKey = null; + int signatureIndex = -1; + + if (dataChunk instanceof PGPCompressedData) { + if (progress != null) + progress.setProgress(R.string.progress_decompressingData, currentProgress, 100); + PGPObjectFactory fact = new PGPObjectFactory( + ((PGPCompressedData) dataChunk).getDataStream()); + dataChunk = fact.nextObject(); + plainFact = fact; + currentProgress += 10; + } + + if (dataChunk instanceof PGPOnePassSignatureList) { + if (progress != null) + progress.setProgress(R.string.progress_processingSignature, currentProgress, 100); + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE, true); + PGPOnePassSignatureList sigList = (PGPOnePassSignatureList) dataChunk; + for (int i = 0; i < sigList.size(); ++i) { + signature = sigList.get(i); + signatureKey = ProviderHelper.getPGPPublicKeyByKeyId(context, signature.getKeyID()); + if (signatureKeyId == 0) { + signatureKeyId = signature.getKeyID(); + } + if (signatureKey == null) { + signature = null; + } else { + signatureIndex = i; + signatureKeyId = signature.getKeyID(); + String userId = null; + PGPPublicKeyRing signKeyRing = ProviderHelper.getPGPPublicKeyRingByKeyId( + context, signatureKeyId); + if (signKeyRing != null) { + userId = PgpHelper.getMainUserId(PgpHelper.getMasterKey(signKeyRing)); + } + returnData.putString(KeychainIntentService.RESULT_SIGNATURE_USER_ID, userId); + break; + } + } + + returnData.putLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID, signatureKeyId); + + if (signature != null) { + JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider = new JcaPGPContentVerifierBuilderProvider() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + signature.init(contentVerifierBuilderProvider, signatureKey); + } else { + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_UNKNOWN, true); + } + + dataChunk = plainFact.nextObject(); + currentProgress += 10; + } + + if (dataChunk instanceof PGPSignatureList) { + dataChunk = plainFact.nextObject(); + } + + if (dataChunk instanceof PGPLiteralData) { + if (progress != null) + progress.setProgress(R.string.progress_decrypting, currentProgress, 100); + PGPLiteralData literalData = (PGPLiteralData) dataChunk; + OutputStream out = outStream; + + byte[] buffer = new byte[1 << 16]; + InputStream dataIn = literalData.getInputStream(); + + int startProgress = currentProgress; + int endProgress = 100; + if (signature != null) { + endProgress = 90; + } else if (encryptedData.isIntegrityProtected()) { + endProgress = 95; + } + int n = 0; + int done = 0; + long startPos = data.getStreamPosition(); + while ((n = dataIn.read(buffer)) > 0) { + out.write(buffer, 0, n); + done += n; + if (signature != null) { + try { + signature.update(buffer, 0, n); + } catch (SignatureException e) { + returnData + .putBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS, false); + signature = null; + } + } + // unknown size, but try to at least have a moving, slowing down progress bar + currentProgress = startProgress + (endProgress - startProgress) * done + / (done + 100000); + if (data.getSize() - startPos == 0) { + currentProgress = endProgress; + } else { + currentProgress = (int) (startProgress + (endProgress - startProgress) + * (data.getStreamPosition() - startPos) / (data.getSize() - startPos)); + } + updateProgress(progress, currentProgress, 100); + } + + if (signature != null) { + if (progress != null) + progress.setProgress(R.string.progress_verifyingSignature, 90, 100); + PGPSignatureList signatureList = (PGPSignatureList) plainFact.nextObject(); + PGPSignature messageSignature = signatureList.get(signatureIndex); + if (signature.verify(messageSignature)) { + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS, true); + } else { + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS, false); + } + } + } + + // TODO: add integrity somewhere + if (encryptedData.isIntegrityProtected()) { + if (progress != null) + progress.setProgress(R.string.progress_verifyingIntegrity, 95, 100); + if (encryptedData.verify()) { + // passed + } else { + // failed + } + } else { + // no integrity check + } + + updateProgress(progress, R.string.progress_done, 100, 100); + return returnData; + } + + public static Bundle verifyText(Context context, ProgressDialogUpdater progress, + InputData data, OutputStream outStream, boolean lookupUnknownKey) throws IOException, + PgpGeneralException, PGPException, SignatureException { + Bundle returnData = new Bundle(); + + ByteArrayOutputStream out = new ByteArrayOutputStream(); + ArmoredInputStream aIn = new ArmoredInputStream(data.getInputStream()); + + updateProgress(progress, R.string.progress_done, 0, 100); + + // mostly taken from ClearSignedFileProcessor + ByteArrayOutputStream lineOut = new ByteArrayOutputStream(); + int lookAhead = readInputLine(lineOut, aIn); + byte[] lineSep = getLineSeparator(); + + byte[] line = lineOut.toByteArray(); + out.write(line, 0, getLengthWithoutSeparator(line)); + out.write(lineSep); + + while (lookAhead != -1 && aIn.isClearText()) { + lookAhead = readInputLine(lineOut, lookAhead, aIn); + line = lineOut.toByteArray(); + out.write(line, 0, getLengthWithoutSeparator(line)); + out.write(lineSep); + } + + out.close(); + + byte[] clearText = out.toByteArray(); + outStream.write(clearText); + + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE, true); + + updateProgress(progress, R.string.progress_processingSignature, 60, 100); + PGPObjectFactory pgpFact = new PGPObjectFactory(aIn); + + PGPSignatureList sigList = (PGPSignatureList) pgpFact.nextObject(); + if (sigList == null) { + throw new PgpGeneralException(context.getString(R.string.error_corruptData)); + } + PGPSignature signature = null; + long signatureKeyId = 0; + PGPPublicKey signatureKey = null; + for (int i = 0; i < sigList.size(); ++i) { + signature = sigList.get(i); + signatureKey = ProviderHelper.getPGPPublicKeyByKeyId(context, signature.getKeyID()); + if (signatureKeyId == 0) { + signatureKeyId = signature.getKeyID(); + } + // if key is not known and we want to lookup unknown ones... + if (signatureKey == null && lookupUnknownKey) { + + returnData = new Bundle(); + returnData.putLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID, signatureKeyId); + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_LOOKUP_KEY, true); + + // return directly now, decrypt will be done again after importing unknown key + return returnData; + } + + if (signatureKey == null) { + signature = null; + } else { + signatureKeyId = signature.getKeyID(); + String userId = null; + PGPPublicKeyRing signKeyRing = ProviderHelper.getPGPPublicKeyRingByKeyId(context, + signatureKeyId); + if (signKeyRing != null) { + userId = PgpHelper.getMainUserId(PgpHelper.getMasterKey(signKeyRing)); + } + returnData.putString(KeychainIntentService.RESULT_SIGNATURE_USER_ID, userId); + break; + } + } + + returnData.putLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID, signatureKeyId); + + if (signature == null) { + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_UNKNOWN, true); + if (progress != null) + progress.setProgress(R.string.progress_done, 100, 100); + return returnData; + } + + JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider = new JcaPGPContentVerifierBuilderProvider() + .setProvider(BOUNCY_CASTLE_PROVIDER_NAME); + + signature.init(contentVerifierBuilderProvider, signatureKey); + + InputStream sigIn = new BufferedInputStream(new ByteArrayInputStream(clearText)); + + lookAhead = readInputLine(lineOut, sigIn); + + processLine(signature, lineOut.toByteArray()); + + if (lookAhead != -1) { + do { + lookAhead = readInputLine(lineOut, lookAhead, sigIn); + + signature.update((byte) '\r'); + signature.update((byte) '\n'); + + processLine(signature, lineOut.toByteArray()); + } while (lookAhead != -1); + } + + returnData.putBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS, signature.verify()); + + updateProgress(progress, R.string.progress_done, 100, 100); + return returnData; + } + + public static int getStreamContent(Context context, InputStream inStream) throws IOException { + InputStream in = PGPUtil.getDecoderStream(inStream); + PGPObjectFactory pgpF = new PGPObjectFactory(in); + Object object = pgpF.nextObject(); + while (object != null) { + if (object instanceof PGPPublicKeyRing || object instanceof PGPSecretKeyRing) { + return Id.content.keys; + } else if (object instanceof PGPEncryptedDataList) { + return Id.content.encrypted_data; + } + object = pgpF.nextObject(); + } + + return Id.content.unknown; + } + + private static void processLine(final String pLine, final ArmoredOutputStream pArmoredOutput, + final PGPSignatureGenerator pSignatureGenerator) throws IOException, SignatureException { + + if (pLine == null) { + return; + } + + final char[] chars = pLine.toCharArray(); + int len = chars.length; + + while (len > 0) { + if (!Character.isWhitespace(chars[len - 1])) { + break; + } + len--; + } + + final byte[] data = pLine.substring(0, len).getBytes("UTF-8"); + + if (pArmoredOutput != null) { + pArmoredOutput.write(data); + } + pSignatureGenerator.update(data); + } + + private static void processLine(final String pLine, final ArmoredOutputStream pArmoredOutput, + final PGPV3SignatureGenerator pSignatureGenerator) throws IOException, + SignatureException { + + if (pLine == null) { + return; + } + + final char[] chars = pLine.toCharArray(); + int len = chars.length; + + while (len > 0) { + if (!Character.isWhitespace(chars[len - 1])) { + break; + } + len--; + } + + final byte[] data = pLine.substring(0, len).getBytes("UTF-8"); + + if (pArmoredOutput != null) { + pArmoredOutput.write(data); + } + pSignatureGenerator.update(data); + } + + // taken from ClearSignedFileProcessor in BC + private static void processLine(PGPSignature sig, byte[] line) throws SignatureException, + IOException { + int length = getLengthWithoutWhiteSpace(line); + if (length > 0) { + sig.update(line, 0, length); + } + } + + private static int readInputLine(ByteArrayOutputStream bOut, InputStream fIn) + throws IOException { + bOut.reset(); + + int lookAhead = -1; + int ch; + + while ((ch = fIn.read()) >= 0) { + bOut.write(ch); + if (ch == '\r' || ch == '\n') { + lookAhead = readPassedEOL(bOut, ch, fIn); + break; + } + } + + return lookAhead; + } + + private static int readInputLine(ByteArrayOutputStream bOut, int lookAhead, InputStream fIn) + throws IOException { + bOut.reset(); + + int ch = lookAhead; + + do { + bOut.write(ch); + if (ch == '\r' || ch == '\n') { + lookAhead = readPassedEOL(bOut, ch, fIn); + break; + } + } while ((ch = fIn.read()) >= 0); + + if (ch < 0) { + lookAhead = -1; + } + + return lookAhead; + } + + private static int readPassedEOL(ByteArrayOutputStream bOut, int lastCh, InputStream fIn) + throws IOException { + int lookAhead = fIn.read(); + + if (lastCh == '\r' && lookAhead == '\n') { + bOut.write(lookAhead); + lookAhead = fIn.read(); + } + + return lookAhead; + } + + private static int getLengthWithoutSeparator(byte[] line) { + int end = line.length - 1; + + while (end >= 0 && isLineEnding(line[end])) { + end--; + } + + return end + 1; + } + + private static boolean isLineEnding(byte b) { + return b == '\r' || b == '\n'; + } + + private static int getLengthWithoutWhiteSpace(byte[] line) { + int end = line.length - 1; + + while (end >= 0 && isWhiteSpace(line[end])) { + end--; + } + + return end + 1; + } + + private static boolean isWhiteSpace(byte b) { + return b == '\r' || b == '\n' || b == '\t' || b == ' '; + } + + private static byte[] getLineSeparator() { + String nl = System.getProperty("line.separator"); + byte[] nlBytes = new byte[nl.length()]; + + for (int i = 0; i != nlBytes.length; i++) { + nlBytes[i] = (byte) nl.charAt(i); + } + + return nlBytes; + } + + public static boolean isReleaseVersion(Context context) { + try { + PackageInfo pi = context.getPackageManager().getPackageInfo(Constants.PACKAGE_NAME, 0); + if (pi.versionCode % 100 == 99) { + return true; + } else { + return false; + } + } catch (NameNotFoundException e) { + // impossible! + return false; + } + } + + public static String getVersion(Context context) { + String version = null; + try { + PackageInfo pi = context.getPackageManager().getPackageInfo(Constants.PACKAGE_NAME, 0); + version = pi.versionName; + return version; + } catch (NameNotFoundException e) { + Log.e(Constants.TAG, "Version could not be retrieved!", e); + return "0.0.0"; + } + } + + public static String getFullVersion(Context context) { + return "APG v" + getVersion(context); + } + + /** + * Generate a random filename + * + * @param length + * @return + */ + public static String generateRandomFilename(int length) { + SecureRandom random = new SecureRandom(); + + byte bytes[] = new byte[length]; + random.nextBytes(bytes); + String result = ""; + for (int i = 0; i < length; ++i) { + int v = (bytes[i] + 256) % 64; + if (v < 10) { + result += (char) ('0' + v); + } else if (v < 36) { + result += (char) ('A' + v - 10); + } else if (v < 62) { + result += (char) ('a' + v - 36); + } else if (v == 62) { + result += '_'; + } else if (v == 63) { + result += '.'; + } + } + return result; + } + + /** + * Go once through stream to get length of stream. The length is later used to display progress + * when encrypting/decrypting + * + * @param in + * @return + * @throws IOException + */ + public static long getLengthOfStream(InputStream in) throws IOException { + long size = 0; + long n = 0; + byte dummy[] = new byte[0x10000]; + while ((n = in.read(dummy)) > 0) { + size += n; + } + return size; + } + + /** + * Deletes file securely by overwriting it with random data before deleting it. + * + * TODO: Does this really help on flash storage? + * + * @param context + * @param progress + * @param file + * @throws FileNotFoundException + * @throws IOException + */ + public static void deleteFileSecurely(Context context, ProgressDialogUpdater progress, File file) + throws FileNotFoundException, IOException { + long length = file.length(); + SecureRandom random = new SecureRandom(); + RandomAccessFile raf = new RandomAccessFile(file, "rws"); + raf.seek(0); + raf.getFilePointer(); + byte[] data = new byte[1 << 16]; + int pos = 0; + String msg = context.getString(R.string.progress_deletingSecurely, file.getName()); + while (pos < length) { + if (progress != null) + progress.setProgress(msg, (int) (100 * pos / length), 100); + random.nextBytes(data); + raf.write(data); + pos += data.length; + } + raf.close(); + file.delete(); + } +} |