import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
public PGPPubkeyEncryptionUtil(String pubkeyBlock){
    InputStream in = new ByteArrayInputStream(pubkeyBlock.getBytes());
    publicKey = null;
    try {
        in = PGPUtil.getDecoderStream(in);
        JcaPGPPublicKeyRingCollection pgpPub = new JcaPGPPublicKeyRingCollection(in);
        in.close();
        Iterator<PGPPublicKeyRing> rIt = pgpPub.getKeyRings();
        while (publicKey == null && rIt.hasNext()) {
            PGPPublicKeyRing keyRing = rIt.next();
            Iterator<PGPPublicKey> kIt = keyRing.getPublicKeys();
            while (publicKey == null && kIt.hasNext()) {
                PGPPublicKey k = kIt.next();
                if (k.isEncryptionKey()) {
                    publicKey = k;
                }
            }
        }
    } catch (Exception e){
        Log.e(LOGCATTAG, e.toString());
    }
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
public static PGPPublicKey readPublicKeyFromCol(InputStream in) throws IOException, PGPException {
    in = PGPUtil.getDecoderStream(in);
    PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(in, new BcKeyFingerprintCalculator());
    PGPPublicKey key = null;
    Iterator<PGPPublicKeyRing> keyRings = pgpPub.getKeyRings();
    while (key == null && keyRings.hasNext()) {
        PGPPublicKeyRing keyRing = keyRings.next();
        Iterator<PGPPublicKey> keys = keyRing.getPublicKeys();
        while (keys.hasNext()) {
            PGPPublicKey k = keys.next();
            if (k.isEncryptionKey()) {
                key = k;
                break;
            }
        }
    }
    if (key == null)
        throw new PGPException("Can't find a valid encryption key in key ring.");

    return key;
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
@SuppressWarnings("unchecked")
public static PGPPublicKey extractPublicKeyFromBytes(byte[] keyBlock) throws IOException, PGPException {
	PGPPublicKeyRingCollection keyringCol = new PGPPublicKeyRingCollection(PGPUtil.getDecoderStream(new ByteArrayInputStream(Base64.decode(keyBlock, Base64.DEFAULT))));
	PGPPublicKey key = null;
	Iterator<PGPPublicKeyRing> rIt = keyringCol.getKeyRings();
	while(key == null && rIt.hasNext()) {
		PGPPublicKeyRing keyring = (PGPPublicKeyRing) rIt.next();
		Iterator<PGPPublicKey> kIt = keyring.getPublicKeys();
		while(key == null && kIt.hasNext()) {
			PGPPublicKey k = (PGPPublicKey) kIt.next();
			if(k.isEncryptionKey())
				key = k;
		}
	}
	
	if(key == null) {
		throw new IllegalArgumentException("there isn't an encryption key here.");
	}

	return key;
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut          = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData  = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
            new File(fileName));
    comData.close();
    return bOut.toByteArray();
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/**
 * A simple routine that opens a key ring file and loads the first available key
 * suitable for encryption.
 *
 * @param input data stream containing the public key data
 * @return the first public key found.
 * @throws IOException
 * @throws PGPException
 */
static PGPPublicKey readPublicKey(InputStream input) throws IOException, PGPException
{
    PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(
            PGPUtil.getDecoderStream(input), new JcaKeyFingerprintCalculator());

    //
    // we just loop through the collection till we find a key suitable for encryption, in the real
    // world you would probably want to be a bit smarter about this.
    //

    Iterator keyRingIter = pgpPub.getKeyRings();
    while (keyRingIter.hasNext())
    {
        PGPPublicKeyRing keyRing = (PGPPublicKeyRing)keyRingIter.next();

        Iterator keyIter = keyRing.getPublicKeys();
        while (keyIter.hasNext())
        {
            PGPPublicKey key = (PGPPublicKey)keyIter.next();

            if (key.isEncryptionKey())
            {
                return key;
            }
        }
    }

    throw new IllegalArgumentException("Can't find encryption key in key ring.");
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/**
 * A simple routine that opens a key ring file and loads the first available key
 * suitable for signature generation.
 *
 * @param input stream to read the secret key ring collection from.
 * @return a secret key.
 * @throws IOException on a problem with using the input stream.
 * @throws PGPException if there is an issue parsing the input stream.
 */
public static PGPSecretKey readSecretKey(InputStream input) throws IOException, PGPException
{
    PGPSecretKeyRingCollection pgpSec = new PGPSecretKeyRingCollection(
            PGPUtil.getDecoderStream(input), new JcaKeyFingerprintCalculator());

    //
    // we just loop through the collection till we find a key suitable for encryption, in the real
    // world you would probably want to be a bit smarter about this.
    //

    Iterator keyRingIter = pgpSec.getKeyRings();
    while (keyRingIter.hasNext())
    {
        PGPSecretKeyRing keyRing = (PGPSecretKeyRing)keyRingIter.next();

        Iterator keyIter = keyRing.getSecretKeys();
        while (keyIter.hasNext())
        {
            PGPSecretKey key = (PGPSecretKey)keyIter.next();

            if (key.isSigningKey())
            {
                return key;
            }
        }
    }

    throw new IllegalArgumentException("Can't find signing key in key ring.");
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
@Override
public PGPPublicKey getPublicKey(File file) throws Exception {
    InputStream input=new FileInputStream(file);
    JcaPGPPublicKeyRingCollection pgpPub = new JcaPGPPublicKeyRingCollection(PGPUtil.getDecoderStream(input));
    PGPPublicKey pubKey = null;

    @SuppressWarnings("unchecked")
    Iterator<PGPPublicKeyRing> keyRingIterator = pgpPub.getKeyRings();
    while (keyRingIterator.hasNext() && pubKey == null) {
        PGPPublicKeyRing keyRing = keyRingIterator.next();

        @SuppressWarnings("unchecked")
        Iterator<PGPPublicKey> keyIterator = keyRing.getPublicKeys();
        while (keyIterator.hasNext()) {
            PGPPublicKey key = keyIterator.next();

            if (key.isEncryptionKey()) {
                pubKey = key;
                break;
            }
        }
    }

    if(pubKey != null) {
        return pubKey;
    }
    else {
        throw new IllegalArgumentException("Can't find encryption key in key ring.");
    }
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/** Generates a cross-certification for a subkey. */
private static PGPSignature crossCertify(PGPKeyPair signer, PGPPublicKey key) throws PGPException {
    PGPSignatureGenerator sGen = new PGPSignatureGenerator(
        new JcaPGPContentSignerBuilder(signer.getPublicKey().getAlgorithm(),
            PGPUtil.SHA256).setProvider(PROVIDER));
    sGen.init(PGPSignature.PRIMARYKEY_BINDING, signer.getPrivateKey());
    return sGen.generateCertification(key);
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/** Revokes the given key. */
public static PGPPublicKey revokeKey(PGPKeyPair secret)
        throws PGPException, IOException, SignatureException {

    PGPPrivateKey pgpPrivKey = secret.getPrivateKey();
    PGPPublicKey pgpPubKey = secret.getPublicKey();

    PGPSignatureGenerator       sGen = new PGPSignatureGenerator(
        new JcaPGPContentSignerBuilder(secret.getPublicKey().getAlgorithm(),
            PGPUtil.SHA256).setProvider(PROVIDER));

    sGen.init(PGPSignature.KEY_REVOCATION, pgpPrivKey);

    return PGPPublicKey.addCertification(pgpPubKey, sGen.generateCertification(pgpPubKey));
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/** Signs a public key with the given secret key. */
public static PGPPublicKey signPublicKey(PGPKeyPair secret, PGPPublicKey keyToBeSigned, String id, int certification)
        throws PGPException, IOException, SignatureException {

    PGPPrivateKey pgpPrivKey = secret.getPrivateKey();

    PGPSignatureGenerator       sGen = new PGPSignatureGenerator(
        new JcaPGPContentSignerBuilder(secret.getPublicKey().getAlgorithm(),
            PGPUtil.SHA1).setProvider(PROVIDER));

    sGen.init(certification, pgpPrivKey);

    return PGPPublicKey.addCertification(keyToBeSigned, id, sGen.generateCertification(id, keyToBeSigned));
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/** Signs and add the given user attributes to the given public key. */
public static PGPPublicKey signUserAttributes(PGPKeyPair secret, PGPPublicKey keyToBeSigned, PGPUserAttributeSubpacketVector attributes, int certification)
        throws PGPException, SignatureException {

    PGPPrivateKey pgpPrivKey = secret.getPrivateKey();

    PGPSignatureGenerator       sGen = new PGPSignatureGenerator(
        new JcaPGPContentSignerBuilder(secret.getPublicKey().getAlgorithm(),
            PGPUtil.SHA1).setProvider(PROVIDER));

    sGen.init(certification, pgpPrivKey);

    return PGPPublicKey.addCertification(keyToBeSigned, attributes,
            sGen.generateCertification(attributes, keyToBeSigned));
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/** Revokes the given key. */
public static PGPPublicKey revokeKey(PGPKeyPair secret)
        throws PGPException, IOException, SignatureException {

    PGPPrivateKey pgpPrivKey = secret.getPrivateKey();
    PGPPublicKey pgpPubKey = secret.getPublicKey();

    PGPSignatureGenerator       sGen = new PGPSignatureGenerator(
        new JcaPGPContentSignerBuilder(secret.getPublicKey().getAlgorithm(),
            PGPUtil.SHA1).setProvider(PROVIDER));

    sGen.init(PGPSignature.KEY_REVOCATION, pgpPrivKey);

    return PGPPublicKey.addCertification(pgpPubKey, sGen.generateCertification(pgpPubKey));
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
        new File(fileName));
    comData.close();
    return bOut.toByteArray();
}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/**
    * A simple routine that opens a key ring file and loads the first available key
    * suitable for encryption.
    * 
    * @param input
    * @return
    * @throws IOException
    * @throws PGPException
    */
   @SuppressWarnings("rawtypes")
static PGPPublicKey readPublicKey(InputStream input) throws IOException, PGPException
   {
       PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(
           PGPUtil.getDecoderStream(input));

       //
       // we just loop through the collection till we find a key suitable for encryption, in the real
       // world you would probably want to be a bit smarter about this.
       //

       Iterator keyRingIter = pgpPub.getKeyRings();
       while (keyRingIter.hasNext())
       {
           PGPPublicKeyRing keyRing = (PGPPublicKeyRing)keyRingIter.next();

           Iterator keyIter = keyRing.getPublicKeys();
           while (keyIter.hasNext())
           {
               PGPPublicKey key = (PGPPublicKey)keyIter.next();

               if (key.isEncryptionKey())
               {
                   return key;
               }
           }
       }

       throw new IllegalArgumentException("Can't find encryption key in key ring.");
   }
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
/**
    * A simple routine that opens a key ring file and loads the first available key
    * suitable for signature generation.
    * 
    * @param input stream to read the secret key ring collection from.
    * @return a secret key.
    * @throws IOException on a problem with using the input stream.
    * @throws PGPException if there is an issue parsing the input stream.
    */
   @SuppressWarnings("rawtypes")
public static PGPSecretKey readSecretKey(InputStream input) throws IOException, PGPException
   {
       PGPSecretKeyRingCollection pgpSec = new PGPSecretKeyRingCollection(
           PGPUtil.getDecoderStream(input));

       //
       // we just loop through the collection till we find a key suitable for encryption, in the real
       // world you would probably want to be a bit smarter about this.
       //

       Iterator keyRingIter = pgpSec.getKeyRings();
       while (keyRingIter.hasNext())
       {
           PGPSecretKeyRing keyRing = (PGPSecretKeyRing)keyRingIter.next();

           Iterator keyIter = keyRing.getSecretKeys();
           while (keyIter.hasNext())
           {
               PGPSecretKey key = (PGPSecretKey)keyIter.next();

               if (key.isSigningKey())
               {
                   return key;
               }
           }
       }

       throw new IllegalArgumentException("Can't find signing key in key ring.");
   }
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
@SuppressWarnings("rawtypes")
private static String sign(String stanza, String keyPath, char[] pass) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, PGPException, SignatureException {
	if (stanza == null) {
		stanza = "";
	}

	PGPSecretKey pgpSecKey = EncryptionUtils.readSecretKey(keyPath);
	PGPPrivateKey pgpPrivKey = pgpSecKey.extractPrivateKey(new JcePBESecretKeyDecryptorBuilder().setProvider("SC").build(pass));
	PGPSignatureGenerator sGen = new PGPSignatureGenerator(new JcaPGPContentSignerBuilder(pgpSecKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1).setProvider("SC"));
	PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

	sGen.init(PGPSignature.CANONICAL_TEXT_DOCUMENT, pgpPrivKey);

	Iterator it = pgpSecKey.getPublicKey().getUserIDs();
	if (it.hasNext()) {
		spGen.setSignerUserID(false, (String) it.next());
		sGen.setHashedSubpackets(spGen.generate());
	}

	InputStream fIn = new BufferedInputStream(new ByteArrayInputStream(stanza.getBytes()));
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	ArmoredOutputStream aOut = new ArmoredOutputStream(out);

	aOut.beginClearText(PGPUtil.SHA1);

	//
	// note the last \n/\r/\r\n in the file is ignored
	//
	ByteArrayOutputStream lineOut = new ByteArrayOutputStream();
	int lookAhead = readInputLine(lineOut, fIn);

	processLine(aOut, sGen, lineOut.toByteArray());

	if (lookAhead != -1) {
		do {
			lookAhead = readInputLine(lineOut, lookAhead, fIn);

			sGen.update((byte) '\r');
			sGen.update((byte) '\n');

			processLine(aOut, sGen, lineOut.toByteArray());
		} while (lookAhead != -1);
	}

	fIn.close();

	aOut.endClearText();

	BCPGOutputStream bOut = new BCPGOutputStream(aOut);

	sGen.generate().encode(bOut);

	aOut.close();

	String signed = new String(out.toByteArray());

	bOut.close();

	return EncryptedDataProvider.removeHeaderFooter(signed);

}
 

import org.spongycastle.openpgp.PGPUtil; //导入依赖的package包/类
@SuppressWarnings({ "deprecation" })
public static byte[] applySignature(byte[] data, PGPSecretKey secretKey, PGPPublicKey publicKey, PGPPrivateKey privateKey) throws NoSuchAlgorithmException, PGPException, IOException, SignatureException {
	BouncyCastleProvider bc = new BouncyCastleProvider();
	Security.addProvider(bc);

	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	
	OutputStream targetOut = new ArmoredOutputStream(baos);
	
	PGPSignatureGenerator sGen = new PGPSignatureGenerator(secretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1, bc);
	sGen.initSign(PGPSignature.BINARY_DOCUMENT, privateKey);
	
	PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator(PGPCompressedDataGenerator.ZLIB);
	BCPGOutputStream bOut = new BCPGOutputStream(cGen.open(targetOut));
	
	sGen.update(data);
	
	sGen.generate().encode(bOut);
	
	cGen.close();
	bOut.close();
	targetOut.close();
	
	byte[] outdata = baos.toByteArray();
	return outdata;


}