Examples of org.bouncycastle.openpgp.PGPSignatureGenerator

org.bouncycastle.openpgp.PGPSignatureGenerator
Generator for PGP Signatures.

        PGPPrivateKey privKey)
        throws Exception
    {            
        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
        ByteArrayInputStream  testIn = new ByteArrayInputStream(TEST_DATA);
        PGPSignatureGenerator sGen = new PGPSignatureGenerator(encAlgorithm, hashAlgorithm, "BC");
        
        sGen.initSign(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);
    }

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        PGPPrivateKey  privKey,
        byte[]         data,
        byte[]         canonicalData)
        throws Exception
    {            
        PGPSignatureGenerator sGen = new PGPSignatureGenerator(encAlgorithm, HashAlgorithmTags.SHA1, "BC");  
        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
        ByteArrayInputStream  testIn = new ByteArrayInputStream(data);
        Date                  creationTime = new Date();
        
        sGen.initSign(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");
        }

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            // signature generation
            //
            String                                data = "hello world!";
            ByteArrayOutputStream    bOut = new ByteArrayOutputStream();
            ByteArrayInputStream        testIn = new ByteArrayInputStream(data.getBytes());
            PGPSignatureGenerator    sGen = new PGPSignatureGenerator(PGPPublicKey.DSA, PGPUtil.SHA1, "BC");
        
            sGen.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);


            PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator(
                PGPCompressedData.ZIP);


            BCPGOutputStream bcOut = new BCPGOutputStream(
                cGen.open(new UncloseableOutputStream(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);


            cGen.close();


            //
            // verify generated signature

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        createSignatureGenerator(secretKey, password);
    }
    
    public void createSignatureGenerator(PGPSecretKey secretKey, char[] password) throws Exception {
        PGPPrivateKey pgpPrivKey = secretKey.extractPrivateKey(password, "BC");
        PGPSignatureGenerator signGen = new PGPSignatureGenerator(secretKey.getPublicKey().getAlgorithm(),
                        PGPUtil.SHA1, "BC");
        signGen.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);
        Iterator it = secretKey.getPublicKey().getUserIDs();
        if (it.hasNext()) {
            PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
            spGen.setSignerUserID(false, (String) it.next());
            signGen.setHashedSubpackets(spGen.generate());
        }
        v4signer = signGen;
        onePassSignature = v4signer.generateOnePassVersion(false);
    }

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                keyIn = new FileInputStream(secring);
                pgpSec = readSecretKey(keyIn);
            }
            
            PGPPrivateKey pgpPrivKey = pgpSec.extractPrivateKey(password.toCharArray(), BouncyCastleProvider.PROVIDER_NAME);        
            PGPSignatureGenerator sGen = new PGPSignatureGenerator(pgpSec.getPublicKey().getAlgorithm(), PGPUtil.SHA1, BouncyCastleProvider.PROVIDER_NAME);
            sGen.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);
    
            in = new FileInputStream(src);
            out = new BCPGOutputStream(new ArmoredOutputStream(new FileOutputStream(dest)));
            
            int ch = 0;
            while ((ch = in.read()) >= 0) {
                sGen.update((byte) ch);
            }
            
            sGen.generate().encode(out);
        } catch (SignatureException e) {
            IOException ioexc = new IOException();
            ioexc.initCause(e);
            throw ioexc;
        } catch (PGPException e) {

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        vGen.setImageAttribute(ImageAttribute.JPEG, jpegImage);


        PGPUserAttributeSubpacketVector uVec = vGen.generate();


        PGPSignatureGenerator sGen = new PGPSignatureGenerator(PublicKeyAlgorithmTags.RSA_GENERAL, HashAlgorithmTags.SHA1, "BC");


        sGen.initSign(PGPSignature.POSITIVE_CERTIFICATION, pgpSec.getSecretKey().extractPrivateKey(pass, "BC"));


        PGPSignature sig = sGen.generateCertification(uVec, pubKey);


        PGPPublicKey nKey = PGPPublicKey.addCertification(pubKey, uVec, sig);


        Iterator it = nKey.getUserAttributes();
        int count = 0;

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        key = PGPPublicKey.addCertification(key, uid, sig);
        
        keyEnc = key.getEncoded();


        PGPSignatureGenerator sGen = new PGPSignatureGenerator(PublicKeyAlgorithmTags.RSA_GENERAL, HashAlgorithmTags.SHA1, "BC");
        
        sGen.initSign(PGPSignature.KEY_REVOCATION, secretKey.extractPrivateKey(passPhrase, "BC"));


        sig = sGen.generateCertification(key);


        key = PGPPublicKey.addCertification(key, sig);


        keyEnc = key.getEncoded();


        PGPPublicKeyRing    tmpRing = new PGPPublicKeyRing(keyEnc);


        key = tmpRing.getPublicKey();


        Iterator            sgIt = key.getSignaturesOfType(PGPSignature.KEY_REVOCATION);


        sig = (PGPSignature)sgIt.next();


        sig.initVerify(key, "BC");


        if (!sig.verifyCertification(key))
        {
            fail("failed to verify revocation certification");
        }


        //
        // use of PGPKeyPair
        //
        PGPKeyPair    pgpKp = new PGPKeyPair(PGPPublicKey.RSA_GENERAL , kp.getPublic(), kp.getPrivate(), new Date(), "BC");
        
        PGPPublicKey k1 = pgpKp.getPublicKey();
        
        PGPPrivateKey k2 = pgpKp.getPrivateKey();
        
        k1.getEncoded();


        mixedTest(k2, k1);


        //
        // key pair generation - AES_256 encryption.
        //
        kp = kpg.generateKeyPair();


        secretKey = new PGPSecretKey(PGPSignature.DEFAULT_CERTIFICATION, PublicKeyAlgorithmTags.RSA_GENERAL, kp.getPublic(), kp.getPrivate(), new Date(), "fred", SymmetricKeyAlgorithmTags.AES_256, passPhrase, null, null, new SecureRandom(), "BC");
    
        secretKey.extractPrivateKey(passPhrase, "BC");
        
        secretKey.encode(new ByteArrayOutputStream());
        
        //
        // secret key password changing.
        //
        String  newPass = "newPass";
        
        secretKey = PGPSecretKey.copyWithNewPassword(secretKey, passPhrase, newPass.toCharArray(), secretKey.getKeyEncryptionAlgorithm(), new SecureRandom(), "BC");
        
        secretKey.extractPrivateKey(newPass.toCharArray(), "BC");
        
        secretKey.encode(new ByteArrayOutputStream());
        
        key = secretKey.getPublicKey();


        key.encode(new ByteArrayOutputStream());
        
        it = key.getUserIDs();


        uid = (String)it.next();


        it = key.getSignaturesForID(uid);


        sig = (PGPSignature)it.next();


        sig.initVerify(key, "BC");


        if (!sig.verifyCertification(uid, key))
        {
            fail("failed to verify certification");
        }


        pgpPrivKey = secretKey.extractPrivateKey(newPass.toCharArray(), "BC");
        
        //
        // signature generation
        //
        String                                data = "hello world!";
        
        bOut = new ByteArrayOutputStream();
        
        ByteArrayInputStream        testIn = new ByteArrayInputStream(data.getBytes());
        
        sGen = new PGPSignatureGenerator(PublicKeyAlgorithmTags.RSA_GENERAL, HashAlgorithmTags.SHA1, "BC");
    
        sGen.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);


        PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator(
            PGPCompressedData.ZIP);


        BCPGOutputStream bcOut = new BCPGOutputStream(
            cGen.open(new UncloseableOutputStream(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);


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


        lOut.close();


        sGen.generate().encode(bcOut);


        bcOut.close();


        //
        // verify generated signature
        //
        pgpFact = new PGPObjectFactory(bOut.toByteArray());


        c1 = (PGPCompressedData)pgpFact.nextObject();


        pgpFact = new PGPObjectFactory(c1.getDataStream());
        
        p1 = (PGPOnePassSignatureList)pgpFact.nextObject();
        
        ops = p1.get(0);
        
        p2 = (PGPLiteralData)pgpFact.nextObject();
        if (!p2.getModificationTime().equals(testDate))
        {
            fail("Modification time not preserved: " + p2.getModificationTime() + " " + testDate);
        }


        dIn = p2.getInputStream();


        ops.initVerify(secretKey.getPublicKey(), "BC");
        
        while ((ch = dIn.read()) >= 0)
        {
            ops.update((byte)ch);
        }


        p3 = (PGPSignatureList)pgpFact.nextObject();


        if (!ops.verify(p3.get(0)))
        {
            fail("Failed generated signature check");
        }
        
        //
        // signature generation - version 3
        //
        bOut = new ByteArrayOutputStream();
        
        testIn = new ByteArrayInputStream(data.getBytes());
        PGPV3SignatureGenerator    sGenV3 = new PGPV3SignatureGenerator(PGPPublicKey.RSA_GENERAL, PGPUtil.SHA1, "BC");
    
        sGen.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivKey);


        cGen = new PGPCompressedDataGenerator(
                                                                PGPCompressedData.ZIP);


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


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


        lGen = new PGPLiteralDataGenerator();
        lOut = lGen.open(
            new UncloseableOutputStream(bcOut),
            PGPLiteralData.BINARY,
            "_CONSOLE",
            data.getBytes().length,
            testDate);


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


        lOut.close();


        sGen.generate().encode(bcOut);


        bcOut.close();


        //
        // verify generated signature

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        throws Exception
    {
        String                  data = "hello world!";
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        ByteArrayInputStream    testIn = new ByteArrayInputStream(data.getBytes());
        PGPSignatureGenerator   sGen = new PGPSignatureGenerator(PublicKeyAlgorithmTags.DSA, HashAlgorithmTags.SHA1, "BC");
    
        sGen.initSign(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());
        
        PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator(
                                                                PGPCompressedData.ZIP);


        BCPGOutputStream bcOut = new BCPGOutputStream(
            cGen.open(new UncloseableOutputStream(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);


        cGen.close();


        PGPObjectFactory        pgpFact = new PGPObjectFactory(bOut.toByteArray());
        PGPCompressedData       c1 = (PGPCompressedData)pgpFact.nextObject();

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        // signature generation - canonical text
        //
        String                      data = "hello world!";
        ByteArrayOutputStream       bOut = new ByteArrayOutputStream();
        ByteArrayInputStream        testIn = new ByteArrayInputStream(data.getBytes());
        PGPSignatureGenerator       sGen = new PGPSignatureGenerator(PGPPublicKey.DSA, PGPUtil.SHA1, "BC");


        sGen.initSign(PGPSignature.CANONICAL_TEXT_DOCUMENT, pgpPrivKey);


        PGPCompressedDataGenerator  cGen = new PGPCompressedDataGenerator(
            PGPCompressedData.ZIP);


        BCPGOutputStream bcOut = new BCPGOutputStream(
            cGen.open(new UncloseableOutputStream(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.TEXT,
            "_CONSOLE",
            data.getBytes().length,
            testDate);


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


        lGen.close();


        sGen.generate().encode(bcOut);


        cGen.close();


        //
        // verify generated signature - canconical text

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    }


    private PGPSignatureGenerator createPGPSignatureGenerator(final char[] keyPassPhrase) throws PGPException {
        final PGPContentSignerBuilder csBuilder = new JcaPGPContentSignerBuilder(key
                .getPublicKey().getAlgorithm(), hashAlgorithm);
        final PGPSignatureGenerator generator = new PGPSignatureGenerator(csBuilder);
        final PGPPrivateKey privateKey = extractPGPPrivateKey(keyPassPhrase);


        init(generator, privateKey);
        return generator;
    }

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