Examples with RSAPrivateCrtKeyParameters com.github.zhenwei.core.crypto.params.RSAPrivateCrtKeyParameters used on opensource projects

Example 11 with RSAPrivateCrtKeyParameters

use of com.github.zhenwei.core.crypto.params.RSAPrivateCrtKeyParameters in project LinLong-Java by zhenwei1108.

the class OpenSSHPrivateKeyUtil method encodePrivateKey.

/**
 * Encode a cipher parameters into an OpenSSH private key. This does not add headers like
 * ----BEGIN RSA PRIVATE KEY----
 *
 * @param params the cipher parameters.
 * @return a byte array
 */
public static byte[] encodePrivateKey(AsymmetricKeyParameter params) throws IOException {
    if (params == null) {
        throw new IllegalArgumentException("param is null");
    }
    if (params instanceof RSAPrivateCrtKeyParameters) {
        PrivateKeyInfo pInfo = PrivateKeyInfoFactory.createPrivateKeyInfo(params);
        return pInfo.parsePrivateKey().toASN1Primitive().getEncoded();
    } else if (params instanceof ECPrivateKeyParameters) {
        PrivateKeyInfo pInfo = PrivateKeyInfoFactory.createPrivateKeyInfo(params);
        return pInfo.parsePrivateKey().toASN1Primitive().getEncoded();
    } else if (params instanceof DSAPrivateKeyParameters) {
        DSAPrivateKeyParameters dsaPrivKey = (DSAPrivateKeyParameters) params;
        DSAParameters dsaParams = dsaPrivKey.getParameters();
        ASN1EncodableVector vec = new ASN1EncodableVector();
        vec.add(new ASN1Integer(0));
        vec.add(new ASN1Integer(dsaParams.getP()));
        vec.add(new ASN1Integer(dsaParams.getQ()));
        vec.add(new ASN1Integer(dsaParams.getG()));
        // public key = g.modPow(x, p);
        BigInteger pubKey = dsaParams.getG().modPow(dsaPrivKey.getX(), dsaParams.getP());
        vec.add(new ASN1Integer(pubKey));
        vec.add(new ASN1Integer(dsaPrivKey.getX()));
        try {
            return new DERSequence(vec).getEncoded();
        } catch (Exception ex) {
            throw new IllegalStateException("unable to encode DSAPrivateKeyParameters " + ex.getMessage());
        }
    } else if (params instanceof Ed25519PrivateKeyParameters) {
        Ed25519PublicKeyParameters publicKeyParameters = ((Ed25519PrivateKeyParameters) params).generatePublicKey();
        SSHBuilder builder = new SSHBuilder();
        builder.writeBytes(AUTH_MAGIC);
        // cipher name
        builder.writeString("none");
        // KDF name
        builder.writeString("none");
        // KDF options
        builder.writeString("");
        // Number of keys
        builder.u32(1);
        {
            byte[] pkEncoded = OpenSSHPublicKeyUtil.encodePublicKey(publicKeyParameters);
            builder.writeBlock(pkEncoded);
        }
        {
            SSHBuilder pkBuild = new SSHBuilder();
            int checkint = CryptoServicesRegistrar.getSecureRandom().nextInt();
            pkBuild.u32(checkint);
            pkBuild.u32(checkint);
            pkBuild.writeString("ssh-ed25519");
            // Public key (as part of private key pair)
            byte[] pubKeyEncoded = publicKeyParameters.getEncoded();
            pkBuild.writeBlock(pubKeyEncoded);
            // The private key in SSH is 64 bytes long and is the concatenation of the private and the public keys
            pkBuild.writeBlock(Arrays.concatenate(((Ed25519PrivateKeyParameters) params).getEncoded(), pubKeyEncoded));
            // Comment for this private key (empty)
            pkBuild.writeString("");
            builder.writeBlock(pkBuild.getPaddedBytes());
        }
        return builder.getBytes();
    }
    throw new IllegalArgumentException("unable to convert " + params.getClass().getName() + " to openssh private key");
}