/**
* Preparation for signing, ie. encode <code>tbs</code> - To Be Signed and generate <code>nonce
* </code>. The returned string should be the name of a pki client and should mapped to a view
* with the same name.
*
* @param signData data used during signing
* @return the name of the pki client
* @throws SignatureException if preparation fails
*/
public String prepareSign(SignatureData signData) throws SignatureException {
encodeTbs(signData);
if (!signData.getPkiClient().equals(PkiClient.MOBILE_BANKID)) {
String nonce = signatureService.generateNonce(signData.getPkiClient());
signData.setNonce(nonce);
}
return signData.getPkiClient().toString();
}
private SignatureData createSignatureDataFromXmlDigSig(String signature)
throws SignatureException {
// Start with setting some fields that are known directly
SignatureData signatureData = new SignatureData();
signatureData.setClientType(new ELegType("test", "test", PkiClient.NEXUS_PERSONAL_4X));
signatureData.setSignature(new String(Base64.encode(signature.getBytes())));
// For the rest we need to parse the XML
try {
Document document = createDocument(new ByteArrayInputStream(signature.getBytes()), false);
// nonce and tbs
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expression =
xpath.compile("/Signature/Object/bankIdSignedData/srvInfo/nonce/text()");
String encodedNonce = (String) expression.evaluate(document, XPathConstants.STRING);
String decodedNonce =
new String(Base64.decode(encodedNonce)); // will be re-encoded again before it is sent
signatureData.setNonce(decodedNonce);
expression = xpath.compile("/Signature/Object/bankIdSignedData/usrVisibleData/text()");
String encodedTbs = (String) expression.evaluate(document, XPathConstants.STRING);
String decodedTbs =
new String(Base64.decode(encodedTbs)); // this will be re-encoded again before it is sent
signatureData.setEncodedTbs(encodedTbs);
signatureData.setTbs(decodedTbs);
} catch (XPathExpressionException e) {
throw new SignatureException(e);
} catch (ParserConfigurationException e) {
throw new SignatureException(e);
} catch (SAXException e) {
throw new SignatureException(e);
} catch (IOException e) {
throw new SignatureException(e);
}
return signatureData;
}