Example usage for org.bouncycastle.asn1 ASN1BitString getOctets

Introduction

In this page you can find the example usage for org.bouncycastle.asn1 ASN1BitString getOctets.

Prototype

public byte[] getOctets() 

Source Link

Document

Return the octets contained in this BIT STRING, checking that this BIT STRING really does represent an octet aligned string.

Usage

From source file:se.tillvaxtverket.ttsigvalws.ttwssigvalidation.pdf.PdfSignatureVerifier.java

License:Open Source License

/**
 * Retrieves Public key parameters from a public key
 *
 * @param pubKey The public key// w ww.j ava 2 s .  com
 * @param sigResult The data object where result data are stored
 * @throws IOException
 */
public static void getPkParams(PublicKey pubKey, CMSSigVerifyResult sigResult) throws IOException {

    try {
        String pkStr = String.valueOf(Base64Coder.encode(pubKey.getEncoded()));

        ASN1InputStream din = new ASN1InputStream(new ByteArrayInputStream(pubKey.getEncoded()));
        //ASN1Primitive pkObject = din.readObject();
        ASN1Sequence pkSeq = ASN1Sequence.getInstance(din.readObject());
        ASN1BitString keyBits = (ASN1BitString) pkSeq.getObjectAt(1);

        AlgorithmIdentifier algoId = AlgorithmIdentifier.getInstance(pkSeq.getObjectAt(0));
        PublicKeyType pkType = PublicKeyType.getTypeFromOid(algoId.getAlgorithm().getId());
        sigResult.setPkType(pkType);
        sigResult.setPkType(pkType);
        if (pkType.equals(PublicKeyType.EC)) {
            ASN1ObjectIdentifier curveOid = ASN1ObjectIdentifier.getInstance(algoId.getParameters());
            EcCurve curve = EcCurve.getEcCurveFromOid(curveOid.getId());
            sigResult.setEcCurve(curve);
            int totalKeyBits = getEcKeyLength(keyBits);
            sigResult.setKeyLength(totalKeyBits);
            return;
        }

        if (pkType.equals(PublicKeyType.RSA)) {
            ASN1InputStream keyIs = new ASN1InputStream(keyBits.getOctets());
            ASN1Sequence keyParamsSeq = ASN1Sequence.getInstance(keyIs.readObject());
            ASN1Integer modInt = ASN1Integer.getInstance(keyParamsSeq.getObjectAt(0));
            int modLen = getAsn1IntegerBitLength(modInt);
            sigResult.setKeyLength(modLen);
            return;
        }

    } catch (Exception e) {
        int asdf = 0;
    }

}

---