I am not sure how to use SHA-256 as a cipher algorithm, and doubt you
would use a public key from a certificate with it.
Also, since you seem to be encrypting a significant amount of data I'd
suggest you generate a symmetric key (TRIPLEDES or AES), encrypt the data
("rootElement") with it, and then encrypt the symmetric key with the
public key from the certificate (via RSA_v1dot5 or RSA_OAEP
Good Luck,
Mike
"huang zhimin" <[EMAIL PROTECTED]> wrote on 09/22/2007 04:49:18 AM:
> public void encrypt(Document document) throws Exception {
> KeyStore ks = getKeyStore();
> X509Certificate certificate = getCertificate(ks);
> String algorithmURI = XMLCipher.SHA256;
>
> Element rootElement = document.getDocumentElement();
>
> XMLCipher xmlCipher = XMLCipher.getInstance(algorithmURI);
> xmlCipher.init(XMLCipher.ENCRYPT_MODE,
certificate.getPublicKey());
>
> EncryptedData encryptedData = xmlCipher.getEncryptedData();
> KeyInfo keyInfo = new KeyInfo(document);
> encryptedData.setKeyInfo(keyInfo);
> xmlCipher.doFinal(document, rootElement, true);
> }
>
> The keystore is provided from the example of xml-security. The exception
is
>
> Original Exception was java.security.NoSuchAlgorithmException:
> Cannot find any provider supporting SHA-256
> at org.apache.xml.security.encryption.XMLCipher.getInstance
> (Unknown Source)
> at org.jtang.service.security.engine.SecurityEngine.
> encrypt(SecurityEngine.java:117)
>
> I don't know how to solve it.
>
> --
> http://sourceforge.net/projects/mycodeline/
> http://rubyforge.org/projects/ropenwiki/
