Examples with ECNamedDomainParameters org.bouncycastle.crypto.params.ECNamedDomainParameters used on opensource projects

Example 1 with ECNamedDomainParameters

use of org.bouncycastle.crypto.params.ECNamedDomainParameters in project jruby-openssl by jruby.

the class PKeyEC method dsa_sign_asn1.

@JRubyMethod(name = "dsa_sign_asn1")
public IRubyObject dsa_sign_asn1(final ThreadContext context, final IRubyObject data) {
    try {
        ECNamedCurveParameterSpec params = ECNamedCurveTable.getParameterSpec(getCurveName());
        ASN1ObjectIdentifier oid = getCurveOID(getCurveName());
        ECNamedDomainParameters domainParams = new ECNamedDomainParameters(oid, params.getCurve(), params.getG(), params.getN(), params.getH(), params.getSeed());
        final ECDSASigner signer = new ECDSASigner();
        final ECPrivateKey privKey = (ECPrivateKey) this.privateKey;
        signer.init(true, new ECPrivateKeyParameters(privKey.getS(), domainParams));
        final byte[] message = data.convertToString().getBytes();
        // [r, s]
        BigInteger[] signature = signer.generateSignature(message);
        // final byte[] r = signature[0].toByteArray();
        // final byte[] s = signature[1].toByteArray();
        // // ASN.1 encode as: 0x30 len 0x02 rlen (r) 0x02 slen (s)
        // final int len = 1 + (1 + r.length) + 1 + (1 + s.length);
        // 
        // final byte[] encoded = new byte[1 + 1 + len]; int i;
        // encoded[0] = 0x30;
        // encoded[1] = (byte) len;
        // encoded[2] = 0x20;
        // encoded[3] = (byte) r.length;
        // System.arraycopy(r, 0, encoded, i = 4, r.length); i += r.length;
        // encoded[i++] = 0x20;
        // encoded[i++] = (byte) s.length;
        // System.arraycopy(s, 0, encoded, i, s.length);
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        ASN1OutputStream asn1 = new ASN1OutputStream(bytes);
        ASN1EncodableVector v = new ASN1EncodableVector();
        // r
        v.add(new ASN1Integer(signature[0]));
        // s
        v.add(new ASN1Integer(signature[1]));
        asn1.writeObject(new DLSequence(v));
        return StringHelper.newString(context.runtime, bytes.buffer(), bytes.size());
    } catch (IOException ex) {
        throw newECError(context.runtime, ex.toString());
    } catch (RuntimeException ex) {
        throw newECError(context.runtime, ex.toString());
    }
}