Example usage for org.bouncycastle.jcajce.provider.asymmetric.rsa RSAUtil rsaOids

Introduction

In this page you can find the example usage for org.bouncycastle.jcajce.provider.asymmetric.rsa RSAUtil rsaOids.

Prototype

ASN1ObjectIdentifier[] rsaOids

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Usage

From source file:dorkbox.util.crypto.CryptoX509.java

License:Apache License

/**
 * Creates a NEW signature block that contains the pkcs7 (minus content, which is the .SF file)
 * signature of the .SF file./*from  w ww . j ava 2 s  . co  m*/
 *
 * It contains the hash of the data, and the verification signature.
 */
public static byte[] createSignature(byte[] signatureSourceData, X509CertificateHolder x509CertificateHolder,
        AsymmetricKeyParameter privateKey) {

    try {
        CMSTypedData content = new CMSProcessableByteArray(signatureSourceData);

        ASN1ObjectIdentifier contentTypeOID = new ASN1ObjectIdentifier(content.getContentType().getId());
        ASN1EncodableVector digestAlgs = new ASN1EncodableVector();
        ASN1EncodableVector signerInfos = new ASN1EncodableVector();

        AlgorithmIdentifier sigAlgId = x509CertificateHolder.getSignatureAlgorithm();
        AlgorithmIdentifier digAlgId = new DefaultDigestAlgorithmIdentifierFinder().find(sigAlgId);

        // use the bouncy-castle lightweight API to generate a hash of the signature source data (usually the signature file bytes)
        BcContentSignerBuilder contentSignerBuilder;
        AlgorithmIdentifier digEncryptionAlgorithm;

        if (privateKey instanceof ECPrivateKeyParameters) {
            contentSignerBuilder = new BcECDSAContentSignerBuilder(sigAlgId, digAlgId);
            digEncryptionAlgorithm = new AlgorithmIdentifier(DSAUtil.dsaOids[0], null); // 1.2.840.10040.4.1  // DSA hashID
        } else if (privateKey instanceof DSAPrivateKeyParameters) {
            contentSignerBuilder = new BcDSAContentSignerBuilder(sigAlgId, digAlgId);
            digEncryptionAlgorithm = new AlgorithmIdentifier(DSAUtil.dsaOids[0], null); // 1.2.840.10040.4.1  // DSA hashID
        } else if (privateKey instanceof RSAPrivateCrtKeyParameters) {
            contentSignerBuilder = new BcRSAContentSignerBuilder(sigAlgId, digAlgId);
            digEncryptionAlgorithm = new AlgorithmIdentifier(RSAUtil.rsaOids[0], null); // 1.2.840.113549.1.1.1 // RSA hashID
        } else {
            throw new RuntimeException("Invalid signature type. Only ECDSA, DSA, RSA supported.");
        }

        ContentSigner hashSigner = contentSignerBuilder.build(privateKey);
        OutputStream outputStream = hashSigner.getOutputStream();
        outputStream.write(signatureSourceData, 0, signatureSourceData.length);
        outputStream.flush();
        byte[] sigBytes = hashSigner.getSignature();

        SignerIdentifier sigId = new SignerIdentifier(
                new IssuerAndSerialNumber(x509CertificateHolder.toASN1Structure()));

        SignerInfo inf = new SignerInfo(sigId, digAlgId, null, digEncryptionAlgorithm,
                new DEROctetString(sigBytes), (ASN1Set) null);

        digestAlgs.add(inf.getDigestAlgorithm());
        signerInfos.add(inf);

        ASN1EncodableVector certs = new ASN1EncodableVector();
        certs.add(x509CertificateHolder.toASN1Structure());

        ContentInfo encInfo = new ContentInfo(contentTypeOID, null);
        SignedData sd = new SignedData(new DERSet(digestAlgs), encInfo, new BERSet(certs), null,
                new DERSet(signerInfos));

        ContentInfo contentInfo = new ContentInfo(CMSObjectIdentifiers.signedData, sd);
        CMSSignedData cmsSignedData2 = new CMSSignedData(content, contentInfo);

        return cmsSignedData2.getEncoded();
    } catch (Throwable t) {
        logger.error("Error signing data.", t);
        throw new RuntimeException("Error trying to sign data. " + t.getMessage());
    }
}

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