Example usage for org.bouncycastle.openpgp PGPSignatureSubpacketGenerator PGPSignatureSubpacketGenerator

Introduction

In this page you can find the example usage for org.bouncycastle.openpgp PGPSignatureSubpacketGenerator PGPSignatureSubpacketGenerator.

Prototype

public PGPSignatureSubpacketGenerator()

Source Link

Usage

From source file:ubicrypt.core.crypto.PGPEC.java

License:Open Source License

private static PGPKeyRingGenerator keyRingGenerator(final PGPKeyPair masterKey,
        final PBESecretKeyEncryptor encryptor) {
    // Add a self-signature on the id
    final PGPSignatureSubpacketGenerator signhashgen = new PGPSignatureSubpacketGenerator();

    // Add signed metadata on the signature.
    // 1) Declare its purpose
    signhashgen.setKeyFlags(false, KeyFlags.SIGN_DATA | KeyFlags.CERTIFY_OTHER);
    // 2) Set preferences for secondary crypto algorithms to use
    //    when sending messages to this key.
    signhashgen.setPreferredSymmetricAlgorithms(false, new int[] { SymmetricKeyAlgorithmTags.AES_256,
            SymmetricKeyAlgorithmTags.AES_192, SymmetricKeyAlgorithmTags.AES_128 });
    signhashgen.setPreferredHashAlgorithms(false, new int[] { HashAlgorithmTags.SHA256,
            //                        HashAlgorithmTags.SHA1,
            HashAlgorithmTags.SHA384, HashAlgorithmTags.SHA512, HashAlgorithmTags.SHA224, });
    // 3) Request senders add additional checksums to the
    //    message (useful when verifying unsigned messages.)
    signhashgen.setFeature(false, Features.FEATURE_MODIFICATION_DETECTION);

    try {//from   w  ww  . j a v  a 2  s .  c om
        return new PGPKeyRingGenerator(PGPSignature.POSITIVE_CERTIFICATION, masterKey, Utils.machineName(),
                new BcPGPDigestCalculatorProvider().get(HashAlgorithmTags.SHA1), signhashgen.generate(), null,
                new BcPGPContentSignerBuilder(PGPPublicKey.ECDSA, HashAlgorithmTags.SHA256), encryptor);
    } catch (final PGPException e) {
        Throwables.propagate(e);
    }
    return null;
}

From source file:ubicrypt.core.crypto.PGPEC.java

License:Open Source License

public static PGPPublicKey signPK(final PGPPublicKey pk, final PGPPrivateKey priv) {
    final PGPSignatureGenerator sGen = new PGPSignatureGenerator(
            new JcaPGPContentSignerBuilder(PGPPublicKey.ECDSA, PGPUtil.SHA256).setProvider("BC"));

    try {// w ww . ja  v  a  2 s .c om
        sGen.init(PGPSignature.DIRECT_KEY, priv);
    } catch (final PGPException e) {
        Throwables.propagate(e);
    }

    final PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

    final PGPSignatureSubpacketVector packetVector = spGen.generate();

    sGen.setHashedSubpackets(packetVector);

    try {
        return PGPPublicKey.addCertification(pk, sGen.generateCertification("id", pk));
    } catch (final PGPException e) {
        Throwables.propagate(e);
    }
    return null;
}