Java PGPLiteralDataGenerator.close方法代码示例

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private static void produceSign( byte[] data, BCPGOutputStream bcOut, PGPSignatureGenerator signGen )
        throws IOException, PGPException
{
    PGPLiteralDataGenerator literalGen = new PGPLiteralDataGenerator();

    OutputStream os = literalGen.open( bcOut, PGPLiteralData.BINARY, "", data.length, new Date() );

    InputStream is = new ByteArrayInputStream( data );

    int ch;

    while ( ( ch = is.read() ) >= 0 )
    {
        signGen.update( ( byte ) ch );
        os.write( ch );
    }

    literalGen.close();

    signGen.generate().encode( bcOut );
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
public String encryptString(PGPPublicKey key, String clearText)
		throws IOException, PGPException {

	byte[] clearData = clearText.getBytes(StandardCharsets.UTF_8);

	ByteArrayOutputStream encOut = new ByteArrayOutputStream();
	OutputStream out = new ArmoredOutputStream(encOut);
	ByteArrayOutputStream bOut = new ByteArrayOutputStream();

	PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(
			PGPCompressedDataGenerator.ZIP);
	OutputStream cos = comData.open(bOut);
	PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();

	OutputStream pOut = lData.open(cos, PGPLiteralData.BINARY,
			PGPLiteralData.CONSOLE, clearData.length, new Date());
	pOut.write(clearData);

	lData.close();
	comData.close();

	PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(
			new JcePGPDataEncryptorBuilder(PGPEncryptedData.CAST5)
					.setWithIntegrityPacket(true)
					.setSecureRandom(new SecureRandom()).setProvider(BouncyCastleProvider.PROVIDER_NAME));

	encGen.addMethod(new JcePublicKeyKeyEncryptionMethodGenerator(key)
			.setProvider(BouncyCastleProvider.PROVIDER_NAME));

	byte[] bytes = bOut.toByteArray();
	OutputStream cOut = encGen.open(out, bytes.length);
	cOut.write(bytes);
	cOut.close();
	out.close();

	return new String(encOut.toByteArray());
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private void bufferTest(
    PGPLiteralDataGenerator generator, 
    byte[] buf, 
    int i)
    throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    OutputStream out = generator.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.BINARY,
        PGPLiteralData.CONSOLE,
        i,
        new Date());

    out.write(buf, 0, i);
    
    generator.close();
    
    PGPObjectFactory        fact = new PGPObjectFactory(bOut.toByteArray());
    PGPLiteralData          data = (PGPLiteralData)fact.nextObject();
    InputStream             in = data.getInputStream();

    for (int count = 0; count != i; count++)
    {
        if (in.read() != (buf[count] & 0xff))
        {
            fail("failed readback test - length = " + i);
        }
    }
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private void testSig(
    int           encAlgorithm,
    int           hashAlgorithm,
    PGPPublicKey  pubKey,
    PGPPrivateKey privKey)
    throws Exception
{            
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    ByteArrayInputStream  testIn = new ByteArrayInputStream(TEST_DATA);
    PGPSignatureGenerator sGen = new PGPSignatureGenerator(new JcaPGPContentSignerBuilder(encAlgorithm, hashAlgorithm).setProvider("BC"));
    
    sGen.init(PGPSignature.BINARY_DOCUMENT, privKey);
    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator    lGen = new PGPLiteralDataGenerator();
    OutputStream               lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.BINARY,
        "_CONSOLE",
        TEST_DATA.length * 2,
        new Date());

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lOut.write(TEST_DATA);
    sGen.update(TEST_DATA);
    
    lGen.close();

    sGen.generate().encode(bOut);

    verifySignature(bOut.toByteArray(), hashAlgorithm, pubKey, TEST_DATA);
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private byte[] generateV3BinarySig(PGPPrivateKey privKey, int encAlgorithm, int hashAlgorithm) 
    throws Exception
{
    ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
    ByteArrayInputStream    testIn = new ByteArrayInputStream(TEST_DATA);
    PGPV3SignatureGenerator sGen = new PGPV3SignatureGenerator(new JcaPGPContentSignerBuilder(encAlgorithm, hashAlgorithm).setProvider("BC"));
    
    sGen.init(PGPSignature.BINARY_DOCUMENT, privKey);
    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
    OutputStream            lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.BINARY,
        "_CONSOLE",
        TEST_DATA.length * 2,
        new Date());

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lOut.write(TEST_DATA);
    sGen.update(TEST_DATA);
    
    lGen.close();

    sGen.generate().encode(bOut);
    
    return bOut.toByteArray();
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
/**
 * Generated signature test
 * 
 * @param sKey
 * @param pgpPrivKey
 */
public void generateTest(
    PGPSecretKeyRing sKey,
    PGPPublicKey     pgpPubKey,
    PGPPrivateKey    pgpPrivKey)
    throws Exception
{
    String                  data = "hello world!";
    ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
    ByteArrayInputStream    testIn = new ByteArrayInputStream(data.getBytes());
    PGPSignatureGenerator   sGen = new PGPSignatureGenerator(new BcPGPContentSignerBuilder(PublicKeyAlgorithmTags.DSA, HashAlgorithmTags.SHA1));

    sGen.init(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);

    PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
    
    Iterator        it = sKey.getSecretKey().getPublicKey().getUserIDs();
    String          primaryUserID = (String)it.next();
    
    spGen.setSignerUserID(true, primaryUserID);
    
    sGen.setHashedSubpackets(spGen.generate());

    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
    
    Date testDate = new Date((System.currentTimeMillis() / 1000) * 1000);
    OutputStream lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.BINARY,
        "_CONSOLE",
        data.getBytes().length,
        testDate);

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lGen.close();

    sGen.generate().encode(bOut);

    PGPObjectFactory        pgpFact = new BcPGPObjectFactory(bOut.toByteArray());

    PGPOnePassSignatureList p1 = (PGPOnePassSignatureList)pgpFact.nextObject();
    PGPOnePassSignature     ops = p1.get(0);
    
    PGPLiteralData          p2 = (PGPLiteralData)pgpFact.nextObject();
    if (!p2.getModificationTime().equals(testDate))
    {
        fail("Modification time not preserved");
    }

    InputStream             dIn = p2.getInputStream();

    ops.init(new BcPGPContentVerifierBuilderProvider(), pgpPubKey);
    
    while ((ch = dIn.read()) >= 0)
    {
        ops.update((byte)ch);
    }

    PGPSignatureList p3 = (PGPSignatureList)pgpFact.nextObject();

    if (!ops.verify(p3.get(0)))
    {
        fail("Failed generated signature check");
    }
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
public static byte[] signAndEncrypt( final byte[] message, final PGPSecretKey secretKey, final String secretPwd,
                                     final PGPPublicKey publicKey, final boolean armored ) throws PGPException
{
    try
    {
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        final PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(
                new JcePGPDataEncryptorBuilder( SymmetricKeyAlgorithmTags.AES_256 ).setWithIntegrityPacket( true )
                                                                                   .setSecureRandom(
                                                                                           new SecureRandom() )
                                                                                   .setProvider( provider ) );

        encryptedDataGenerator.addMethod(
                new JcePublicKeyKeyEncryptionMethodGenerator( publicKey ).setSecureRandom( new SecureRandom() )
                                                                         .setProvider( provider ) );

        final OutputStream theOut = armored ? new ArmoredOutputStream( out ) : out;
        final OutputStream encryptedOut = encryptedDataGenerator.open( theOut, new byte[4096] );

        final PGPCompressedDataGenerator compressedDataGenerator =
                new PGPCompressedDataGenerator( CompressionAlgorithmTags.ZIP );
        final OutputStream compressedOut = compressedDataGenerator.open( encryptedOut, new byte[4096] );
        final PGPPrivateKey privateKey = secretKey.extractPrivateKey(
                new JcePBESecretKeyDecryptorBuilder().setProvider( provider ).build( secretPwd.toCharArray() ) );
        final PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(
                new JcaPGPContentSignerBuilder( secretKey.getPublicKey().getAlgorithm(), HashAlgorithmTags.SHA1 )
                        .setProvider( provider ) );
        signatureGenerator.init( PGPSignature.BINARY_DOCUMENT, privateKey );
        final Iterator<?> it = secretKey.getPublicKey().getUserIDs();
        if ( it.hasNext() )
        {
            final PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
            spGen.setSignerUserID( false, ( String ) it.next() );
            signatureGenerator.setHashedSubpackets( spGen.generate() );
        }
        signatureGenerator.generateOnePassVersion( false ).encode( compressedOut );
        final PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
        final OutputStream literalOut = literalDataGenerator
                .open( compressedOut, PGPLiteralData.BINARY, "filename", new Date(), new byte[4096] );
        final InputStream in = new ByteArrayInputStream( message );
        final byte[] buf = new byte[4096];
        for ( int len; ( len = in.read( buf ) ) > 0; )
        {
            literalOut.write( buf, 0, len );
            signatureGenerator.update( buf, 0, len );
        }
        in.close();
        literalDataGenerator.close();
        signatureGenerator.generate().encode( compressedOut );
        compressedDataGenerator.close();
        encryptedDataGenerator.close();
        theOut.close();
        return out.toByteArray();
    }
    catch ( Exception e )
    {
        throw new PGPException( "Error in signAndEncrypt", e );
    }
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
public static byte[] sign( byte[] message, PGPSecretKey secretKey, String secretPwd, boolean armor )
        throws PGPException
{
    try
    {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        OutputStream theOut = armor ? new ArmoredOutputStream( out ) : out;

        PGPPrivateKey pgpPrivKey = secretKey.extractPrivateKey(
                new JcePBESecretKeyDecryptorBuilder().setProvider( provider ).build( secretPwd.toCharArray() ) );
        PGPSignatureGenerator sGen = new PGPSignatureGenerator(
                new JcaPGPContentSignerBuilder( secretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1 )
                        .setProvider( provider ) );

        sGen.init( PGPSignature.BINARY_DOCUMENT, pgpPrivKey );

        Iterator it = secretKey.getPublicKey().getUserIDs();
        if ( it.hasNext() )
        {
            PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

            spGen.setSignerUserID( false, ( String ) it.next() );
            sGen.setHashedSubpackets( spGen.generate() );
        }

        PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator( PGPCompressedData.ZLIB );

        BCPGOutputStream bOut = new BCPGOutputStream( cGen.open( theOut ) );

        sGen.generateOnePassVersion( false ).encode( bOut );

        PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
        OutputStream lOut =
                lGen.open( bOut, PGPLiteralData.BINARY, "filename", new Date(), new byte[4096] );         //
        InputStream fIn = new ByteArrayInputStream( message );
        int ch;

        while ( ( ch = fIn.read() ) >= 0 )
        {
            lOut.write( ch );
            sGen.update( ( byte ) ch );
        }

        lGen.close();

        sGen.generate().encode( bOut );

        cGen.close();

        theOut.close();

        return out.toByteArray();
    }
    catch ( Exception e )
    {
        throw new PGPException( "Error in sign", e );
    }
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
public static byte[] signFile(byte[] content, String fileName, InputStream keyIn,
		char[] pass, Provider securityProvider, TimeProvider timeProvider) throws IOException, NoSuchAlgorithmException,
		NoSuchProviderException, PGPException, SignatureException {

	ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
	ArmoredOutputStream armoredOut = new ArmoredOutputStream(byteArrayOut);
	PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
	PGPCompressedDataGenerator compressedDataGenerator = new PGPCompressedDataGenerator(PGPCompressedData.ZLIB);

	try {
		PGPSecretKey pgpSecretKey = BouncyCastlePGPExampleUtil.readSecretKey(keyIn);
		PGPPrivateKey pgpPrivateKey = pgpSecretKey.extractPrivateKey(pass, securityProvider);
		PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(pgpSecretKey
				.getPublicKey().getAlgorithm(), PGPUtil.SHA1, securityProvider);

		signatureGenerator.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivateKey);

		Iterator<?> it = pgpSecretKey.getPublicKey().getUserIDs();
		if (it.hasNext()) { //get first user ID
			PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

			spGen.setSignerUserID(false, (String) it.next());
			signatureGenerator.setHashedSubpackets(spGen.generate());
		} else {
			throw new PGPException("No user ID found in the public key of the certificate.");
		}
		

		BCPGOutputStream bOut = new BCPGOutputStream(compressedDataGenerator.open(armoredOut));

		signatureGenerator.generateOnePassVersion(false).encode(bOut);

		OutputStream literalOut = literalDataGenerator.open(bOut, PGPLiteralData.BINARY, fileName, timeProvider.nowDate(), content);

		literalOut.write(content);
		signatureGenerator.update(content);

		signatureGenerator.generate().encode(bOut);

	} finally {
		literalDataGenerator.close();
		compressedDataGenerator.close();
		armoredOut.close();
	}
	
	return byteArrayOut.toByteArray();
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
public void run(final char[] passphrase, final InputStream inputStream, final OutputStream outputStream) throws IOException, CryptoException {
  try {
    final OutputStream armor = new ArmoredOutputStream(outputStream);

    final PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(new JcePGPDataEncryptorBuilder(
        SymmetricKeyAlgorithmTags.AES_128).setWithIntegrityPacket(true).setSecureRandom(new SecureRandom()).setProvider(new BouncyCastleProvider()));
    encryptedDataGenerator.addMethod(new JcePublicKeyKeyEncryptionMethodGenerator(publicKey).setSecureRandom(new SecureRandom()).setProvider(
        new BouncyCastleProvider()));

    final OutputStream encryptedOut = encryptedDataGenerator.open(armor, new byte[4096]);

    final PGPCompressedDataGenerator compressedDataGenerator = new PGPCompressedDataGenerator(CompressionAlgorithmTags.ZIP);
    final OutputStream compressedOut = compressedDataGenerator.open(encryptedOut, new byte[4096]);

    final PGPPrivateKey privateKey = secretKey.extractPrivateKey(new JcePBESecretKeyDecryptorBuilder().setProvider(new BouncyCastleProvider())
        .build(passphrase));

    final PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(new JcaPGPContentSignerBuilder(secretKey.getPublicKey()
        .getAlgorithm(), HashAlgorithmTags.SHA1).setProvider(new BouncyCastleProvider()));
    signatureGenerator.init(PGPSignature.BINARY_DOCUMENT, privateKey);
    final Iterator<?> it = secretKey.getPublicKey().getUserIDs();
    if (it.hasNext()) {
      final PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
      spGen.setSignerUserID(false, (String) it.next());
      signatureGenerator.setHashedSubpackets(spGen.generate());
    }
    signatureGenerator.generateOnePassVersion(false).encode(compressedOut);

    final PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
    final OutputStream literalOut = literalDataGenerator.open(compressedOut, PGPLiteralData.BINARY, "", new Date(), new byte[4096]);
    final byte[] buf = new byte[4096];
    for (int len = 0; (len = inputStream.read(buf)) > 0;) {
      literalOut.write(buf, 0, len);
      signatureGenerator.update(buf, 0, len);
    }
    literalDataGenerator.close();
    signatureGenerator.generate().encode(compressedOut);
    compressedDataGenerator.close();
    encryptedDataGenerator.close();
    armor.close();
  }
  catch (final Exception e) {
    throw new CryptoException(e);
  }

}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private void testTextSig(
    int            encAlgorithm,
    int            hashAlgorithm,
    PGPPublicKey   pubKey,
    PGPPrivateKey  privKey,
    byte[]         data,
    byte[]         canonicalData)
    throws Exception
{            
    PGPSignatureGenerator sGen = new PGPSignatureGenerator(new JcaPGPContentSignerBuilder(encAlgorithm, HashAlgorithmTags.SHA1).setProvider("BC"));
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    ByteArrayInputStream  testIn = new ByteArrayInputStream(data);
    Date                  creationTime = new Date();
    
    sGen.init(PGPSignature.CANONICAL_TEXT_DOCUMENT, privKey);
    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator    lGen = new PGPLiteralDataGenerator();
    OutputStream               lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.TEXT,
        "_CONSOLE",
        data.length * 2,
        creationTime);

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lOut.write(data);
    sGen.update(data);
    
    lGen.close();

    PGPSignature sig = sGen.generate();

    if (sig.getCreationTime().getTime() == 0)
    {
        fail("creation time not set in v4 signature");
    }

    sig.encode(bOut);

    verifySignature(bOut.toByteArray(), hashAlgorithm, pubKey, canonicalData);
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private void testTextSigV3(
    int            encAlgorithm,
    int            hashAlgorithm,
    PGPPublicKey   pubKey,
    PGPPrivateKey  privKey,
    byte[]         data,
    byte[]         canonicalData)
    throws Exception
{            
    PGPV3SignatureGenerator sGen = new PGPV3SignatureGenerator(new JcaPGPContentSignerBuilder(encAlgorithm, HashAlgorithmTags.SHA1).setProvider("BC"));
    ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
    ByteArrayInputStream    testIn = new ByteArrayInputStream(data);
    
    sGen.init(PGPSignature.CANONICAL_TEXT_DOCUMENT, privKey);
    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
    OutputStream            lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.TEXT,
        "_CONSOLE",
        data.length * 2,
        new Date());

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lOut.write(data);
    sGen.update(data);
    
    lGen.close();

    PGPSignature sig = sGen.generate();

    if (sig.getCreationTime().getTime() == 0)
    {
        fail("creation time not set in v3 signature");
    }

    sig.encode(bOut);

    verifySignature(bOut.toByteArray(), hashAlgorithm, pubKey, canonicalData);
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
private void doSigGenerateTest(String privateKeyFile, String publicKeyFile, int digest)
    throws Exception
{
    PGPSecretKeyRing      secRing = loadSecretKey(privateKeyFile);
    PGPPublicKeyRing      pubRing = loadPublicKey(publicKeyFile);
    String                data = "hello world!";
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    ByteArrayInputStream  testIn = new ByteArrayInputStream(data.getBytes());
    PGPSignatureGenerator sGen = new PGPSignatureGenerator(PublicKeyAlgorithmTags.DSA, digest, "BC");

    sGen.initSign(PGPSignature.BINARY_DOCUMENT, secRing.getSecretKey().extractPrivateKey("test".toCharArray(), "BC"));

    BCPGOutputStream bcOut = new BCPGOutputStream(bOut);

    sGen.generateOnePassVersion(false).encode(bcOut);

    PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();

    Date testDate = new Date((System.currentTimeMillis() / 1000) * 1000);
    OutputStream lOut = lGen.open(
        new UncloseableOutputStream(bcOut),
        PGPLiteralData.BINARY,
        "_CONSOLE",
        data.getBytes().length,
        testDate);

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lGen.close();

    sGen.generate().encode(bcOut);

    PGPObjectFactory        pgpFact = new PGPObjectFactory(bOut.toByteArray());
    PGPOnePassSignatureList p1 = (PGPOnePassSignatureList)pgpFact.nextObject();
    PGPOnePassSignature     ops = p1.get(0);

    assertEquals(digest, ops.getHashAlgorithm());
    assertEquals(PublicKeyAlgorithmTags.DSA, ops.getKeyAlgorithm());

    PGPLiteralData          p2 = (PGPLiteralData)pgpFact.nextObject();
    if (!p2.getModificationTime().equals(testDate))
    {
        fail("Modification time not preserved");
    }

    InputStream             dIn = p2.getInputStream();

    ops.initVerify(pubRing.getPublicKey(), "BC");

    while ((ch = dIn.read()) >= 0)
    {
        ops.update((byte)ch);
    }

    PGPSignatureList p3 = (PGPSignatureList)pgpFact.nextObject();
    PGPSignature sig = p3.get(0);

    assertEquals(digest, sig.getHashAlgorithm());
    assertEquals(PublicKeyAlgorithmTags.DSA, sig.getKeyAlgorithm());

    assertTrue(ops.verify(sig));
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
/**
 * Encrypt, sign and write input stream data to output stream.
 * Input and output stream are closed.
 */
private static void encryptAndSign(
        InputStream plainInput, OutputStream encryptedOutput,
        PersonalKey myKey, List<PGPUtils.PGPCoderKey> receiverKeys)
        throws IOException, PGPException {

    // setup data encryptor & generator
    BcPGPDataEncryptorBuilder encryptor = new BcPGPDataEncryptorBuilder(PGPEncryptedData.AES_192);
    encryptor.setWithIntegrityPacket(true);
    encryptor.setSecureRandom(new SecureRandom());

    // add public key recipients
    PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(encryptor);
    receiverKeys.forEach(key ->
        encGen.addMethod(new BcPublicKeyKeyEncryptionMethodGenerator(key.encryptKey)));

    OutputStream encryptedOut = encGen.open(encryptedOutput, new byte[BUFFER_SIZE]);

    // setup compressed data generator
    PGPCompressedDataGenerator compGen = new PGPCompressedDataGenerator(PGPCompressedData.ZIP);
    OutputStream compressedOut = compGen.open(encryptedOut, new byte[BUFFER_SIZE]);

    // setup signature generator
    int algo = myKey.getSigningAlgorithm();
    PGPSignatureGenerator sigGen = new PGPSignatureGenerator(
            new BcPGPContentSignerBuilder(algo, HashAlgorithmTags.SHA256));
    sigGen.init(PGPSignature.BINARY_DOCUMENT, myKey.getPrivateSigningKey());

    PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
    spGen.setSignerUserID(false, myKey.getUserId());
    sigGen.setUnhashedSubpackets(spGen.generate());

    sigGen.generateOnePassVersion(false).encode(compressedOut);

    // Initialize literal data generator
    PGPLiteralDataGenerator literalGen = new PGPLiteralDataGenerator();
    OutputStream literalOut = literalGen.open(
        compressedOut,
        PGPLiteralData.BINARY,
        "",
        new Date(),
        new byte[BUFFER_SIZE]);

    // read the "in" stream, compress, encrypt and write to the "out" stream
    // this must be done if clear data is bigger than the buffer size
    // but there are other ways to optimize...
    byte[] buf = new byte[BUFFER_SIZE];
    int len;
    while ((len = plainInput.read(buf)) > 0) {
        literalOut.write(buf, 0, len);
        sigGen.update(buf, 0, len);
    }

    literalGen.close();

    // generate the signature, compress, encrypt and write to the "out" stream
    sigGen.generate().encode(compressedOut);
    compGen.close();
    encGen.close();
}
 

import org.bouncycastle.openpgp.PGPLiteralDataGenerator; //导入方法依赖的package包/类
/**
 * Generated signature test
 * 
 * @param sKey
 * @param pgpPrivKey
 */
public void generateTest(
    PGPSecretKeyRing sKey,
    PGPPublicKey     pgpPubKey,
    PGPPrivateKey    pgpPrivKey)
    throws Exception
{
    String                  data = "hello world!";
    ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
    ByteArrayInputStream    testIn = new ByteArrayInputStream(data.getBytes());
    PGPSignatureGenerator   sGen = new PGPSignatureGenerator(new BcPGPContentSignerBuilder(PublicKeyAlgorithmTags.DSA, HashAlgorithmTags.SHA1));

    sGen.init(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);

    PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
    
    Iterator        it = sKey.getSecretKey().getPublicKey().getUserIDs();
    String          primaryUserID = (String)it.next();
    
    spGen.setSignerUserID(true, primaryUserID);
    
    sGen.setHashedSubpackets(spGen.generate());

    sGen.generateOnePassVersion(false).encode(bOut);

    PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
    
    Date testDate = new Date((System.currentTimeMillis() / 1000) * 1000);
    OutputStream lOut = lGen.open(
        new UncloseableOutputStream(bOut),
        PGPLiteralData.BINARY,
        "_CONSOLE",
        data.getBytes().length,
        testDate);

    int ch;
    while ((ch = testIn.read()) >= 0)
    {
        lOut.write(ch);
        sGen.update((byte)ch);
    }

    lGen.close();

    sGen.generate().encode(bOut);

    PGPObjectFactory        pgpFact = new PGPObjectFactory(bOut.toByteArray());

    PGPOnePassSignatureList p1 = (PGPOnePassSignatureList)pgpFact.nextObject();
    PGPOnePassSignature     ops = p1.get(0);
    
    PGPLiteralData          p2 = (PGPLiteralData)pgpFact.nextObject();
    if (!p2.getModificationTime().equals(testDate))
    {
        fail("Modification time not preserved");
    }

    InputStream             dIn = p2.getInputStream();

    ops.init(new BcPGPContentVerifierBuilderProvider(), pgpPubKey);
    
    while ((ch = dIn.read()) >= 0)
    {
        ops.update((byte)ch);
    }

    PGPSignatureList p3 = (PGPSignatureList)pgpFact.nextObject();

    if (!ops.verify(p3.get(0)))
    {
        fail("Failed generated signature check");
    }
}