Signature retrieval

Question

Hello,
I'm using the SUN Provider to put a signature, from an X509 Certificate, into a der output stream using the putBitString() method. Unfortunately, when I try the signature retrieval, using the getBitString() method, the byte array I get is not the same with the initial signature byte array. Any ideas?

Answer 1

Thanks for your answer! Here is the code doing the same thing, but using the bouncycastle and having in mind what you suggested:
import org.bouncycastle.asn1.*;
FileOutputStream fOut=new FileOutputStream("TEST");
ASN1OutputStream aOut=new ASN1OutputStream(fOut);
DEROctetString dOctetString=new DEROctetString(sig);// sig is the signature and //it's type is byte[]
aOut.writeObject(dOctetString);
aOut.close();
fOut.close();
FileInputStream file=new FileInputStream("TEST");
ASN1InputStream aInput=new ASN1InputStream(file);
DERObject d=aInput.readObject();
ASN1OctetString inputSig=ASN1OctetString.getInstance(d);
byte[] octets=inputSig.getOctets();
file.close();
aInput.close();
Unfortunately, sig and octets are not the same as they should. The problem still exists.
Edited by: bolle_sailor on Aug 5, 2009 1:42 AM