[android-developers] Re: BouncyCastle signature value does not match with dotNET signature value.

Em domingo, 13 de janeiro de 2013 10h22min21s UTC-2, mbarbiero escreveu:

Hi...

I have a problem in SHA1withRSA signature using BouncyCastle on Android: BouncyCastle signature value does not match with dotNET signature value.

I tryed to use many algorithms like "SHA1withRSA", "SHA1withRSAAndMGF1" or "SHA1withRSA/ISO9796-2" with no satisfactory results.

If I use the same message, same algorithm and the same private key, the result must be identical in dotNet and BoucyCastle... is it?

Whats wrong in my code??? 

Getting the privateKey:

...

ks = KeyStore.getInstance("PKCS12");

...

key = ks.getKey(alias, senha.toCharArray());

if (key instanceof PrivateKey) {

privateKey = (PrivateKey) key;

}

Signature method:

public String signer(String txt, String alg) throws Exception {

Signature signer = Signature.getInstance(alg, new BouncyCastleProvider());

signer.initSign(privateKey);

signer.update(txt.getBytes("UTF-8"));

return Base64.encodeToString(signer.sign(), Base64.NO_WRAP);

}

ps. My app must use XMLDSIG protocol to send XML to a government's webservice.

Thanks in advance.

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