import org.bouncycastle.asn1.sec.ECPrivateKey; //导入依赖的package包/类
public ECPrivateKey getPrivateKey() throws IOException {
	ASN1Sequence pkSeq = null;
	pkSeq = (ASN1Sequence) ASN1Sequence.fromByteArray(pkBytes);
	
	PrivateKeyInfo pkInfo = PrivateKeyInfo.getInstance(pkSeq);
	ECPrivateKey ecpk = ECPrivateKey.getInstance(pkInfo.parsePrivateKey());
	return ecpk;
}
 

import org.bouncycastle.asn1.sec.ECPrivateKey; //导入依赖的package包/类
public static void main(String[] args) throws IOException {
	byte[] pkBytes = readBinaryFile("/home/tsenger/Dokumente/Programming/animamea/certs/Key_DEATTIDBSIDE003.pkcs8");
	
	DERSequence pkSeq =  (DERSequence) DERSequence.fromByteArray(pkBytes);
	
	PrivateKeyInfo pkInfo = new PrivateKeyInfo(pkSeq);
	
	 AlgorithmIdentifier ecPublicKey = pkInfo.getPrivateKeyAlgorithm();
	 System.out.println(ecPublicKey.getAlgorithm().toString());
	 System.out.println(HexString.bufferToHex(ecPublicKey.getEncoded(null)));
	 
	 X9ECParameters ecp = X9ECParameters.getInstance(ecPublicKey.getParameters());
	 
	 System.out.println("N: \n"+HexString.bufferToHex(Converter.bigIntToByteArray(ecp.getN())));
			 
	 ECPrivateKey ecpk2 = ECPrivateKey.getInstance(ecPublicKey); 
	 //ECPrivateKey.getInstance(pkInfo.getPrivateKey());
	 System.out.println("private Key: \n"+HexString.bufferToHex(Converter.bigIntToByteArray(ecpk2.getKey())));
	
}