Example usage for org.bouncycastle.crypto.signers PSSSigner verifySignature

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.signers PSSSigner verifySignature.

Prototype

public boolean verifySignature(byte[] signature) 

Source Link

Document

return true if the internal state represents the signature described in the passed in array.

Usage

From source file:dorkbox.util.crypto.CryptoRSA.java

License:Apache License

/**
 * RSA verify data with a specified key.
 *//*from  www . j av  a 2 s.co  m*/
public static boolean verify(PSSSigner signer, RSAKeyParameters rsaPublicKey, byte[] sig, byte[] mesg) {
    signer.init(false, rsaPublicKey);
    signer.update(mesg, 0, mesg.length);

    return signer.verifySignature(sig);
}

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From source file:org.nfc.eclipse.ndef.signature.SignatureVerifier.java

License:Open Source License

public Boolean verify(CertificateFormat certificateFormat, byte[] certificateBytes, SignatureType signatureType,
        byte[] signatureBytes, byte[] coveredBytes) throws CertificateException, NoSuchProviderException {

    if (Security.getProvider("BC") == null) {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }//www.  ja va  2  s .c  o m

    Certificate certificate = null;
    if (certificateFormat == CertificateFormat.X_509) {
        java.security.cert.CertificateFactory cf = java.security.cert.CertificateFactory.getInstance("X.509",
                "BC");

        certificate = cf.generateCertificate(new ByteArrayInputStream(certificateBytes));
    }

    if (signatureType == SignatureType.RSASSA_PKCS1_v1_5_WITH_SHA_1) {

        BCRSAPublicKey key = (BCRSAPublicKey) certificate.getPublicKey();

        RSAKeyParameters pubParameters = new RSAKeyParameters(false, key.getModulus(), key.getPublicExponent());

        SHA1Digest digest = new SHA1Digest();

        RSADigestSigner rsaDigestSigner = new RSADigestSigner(digest);
        rsaDigestSigner.init(false, pubParameters);
        rsaDigestSigner.update(coveredBytes, 0, coveredBytes.length);

        return rsaDigestSigner.verifySignature(signatureBytes);
    } else if (signatureType == SignatureType.RSASSA_PSS_SHA_1) {
        BCRSAPublicKey key = (BCRSAPublicKey) certificate.getPublicKey();

        RSAKeyParameters pubParameters = new RSAKeyParameters(false, key.getModulus(), key.getPublicExponent());

        AsymmetricBlockCipher rsaEngine = new RSABlindedEngine();
        rsaEngine.init(false, pubParameters);

        SHA1Digest digest = new SHA1Digest();

        PSSSigner signer = new PSSSigner(rsaEngine, digest, digest.getDigestSize());
        signer.init(true, pubParameters);
        signer.update(coveredBytes, 0, coveredBytes.length);

        return signer.verifySignature(signatureBytes);
    } else if (signatureType == SignatureType.ECDSA) {

        // http://en.wikipedia.org/wiki/Elliptic_Curve_DSA
        // http://stackoverflow.com/questions/11339788/tutorial-of-ecdsa-algorithm-to-sign-a-string
        // http://www.bouncycastle.org/wiki/display/JA1/Elliptic+Curve+Key+Pair+Generation+and+Key+Factories
        // http://java2s.com/Open-Source/Java/Security/Bouncy-Castle/org/bouncycastle/crypto/test/ECTest.java.htm

        /*
        BCRSAPublicKey key = (BCRSAPublicKey) certificate.getPublicKey();
                
          RSAKeyParameters pubParameters = new RSAKeyParameters(false, key.getModulus(), key.getPublicExponent());
                
           org.bouncycastle.crypto.signers.ECDSASigner signer = new org.bouncycastle.crypto.signers.ECDSASigner();
           signer.init(false, pubParameters);
                
          SHA1Digest digest = new SHA1Digest();
           digest.update(coveredBytes, 0, coveredBytes.length);
                
           return signer.verifySignature(signatureBytes);
           */
    } else if (signatureType == SignatureType.DSA) {

        ASN1InputStream aIn = new ASN1InputStream(signatureBytes);
        ASN1Primitive o;
        try {
            o = aIn.readObject();

            ASN1Sequence asn1Sequence = (ASN1Sequence) o;

            BigInteger r = DERInteger.getInstance(asn1Sequence.getObjectAt(0)).getValue();
            BigInteger s = DERInteger.getInstance(asn1Sequence.getObjectAt(1)).getValue();

            BCDSAPublicKey key = (BCDSAPublicKey) certificate.getPublicKey();

            // DSA Domain parameters
            DSAParams params = key.getParams();
            if (params == null) {
                return Boolean.FALSE;
            }

            DSAParameters parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());

            DSASigner signer = new DSASigner();
            signer.init(false, new DSAPublicKeyParameters(key.getY(), parameters));

            SHA1Digest digest = new SHA1Digest();
            digest.update(coveredBytes, 0, coveredBytes.length);
            byte[] message = new byte[digest.getDigestSize()];
            digest.doFinal(message, 0);

            return signer.verifySignature(message, r, s);
        } catch (IOException e) {
            return Boolean.FALSE;
        }
    }

    return null;

}

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