/**
* Creates a {@code KeyValueType} that wraps the specified public key. This method supports DSA
* and RSA keys.
*
* @param key the {@code PublicKey} that will be represented as a {@code KeyValueType}.
* @return the constructed {@code KeyValueType} or {@code null} if the specified key is neither a
* DSA nor a RSA key.
*/
public static KeyValueType createKeyValue(PublicKey key) {
if (key instanceof RSAPublicKey) {
RSAPublicKey pubKey = (RSAPublicKey) key;
byte[] modulus = pubKey.getModulus().toByteArray();
byte[] exponent = pubKey.getPublicExponent().toByteArray();
RSAKeyValueType rsaKeyValue = new RSAKeyValueType();
rsaKeyValue.setModulus(Base64.encodeBytes(modulus).getBytes());
rsaKeyValue.setExponent(Base64.encodeBytes(exponent).getBytes());
return rsaKeyValue;
} else if (key instanceof DSAPublicKey) {
DSAPublicKey pubKey = (DSAPublicKey) key;
byte[] P = pubKey.getParams().getP().toByteArray();
byte[] Q = pubKey.getParams().getQ().toByteArray();
byte[] G = pubKey.getParams().getG().toByteArray();
byte[] Y = pubKey.getY().toByteArray();
DSAKeyValueType dsaKeyValue = new DSAKeyValueType();
dsaKeyValue.setP(Base64.encodeBytes(P).getBytes());
dsaKeyValue.setQ(Base64.encodeBytes(Q).getBytes());
dsaKeyValue.setG(Base64.encodeBytes(G).getBytes());
dsaKeyValue.setY(Base64.encodeBytes(Y).getBytes());
return dsaKeyValue;
}
throw logger.unsupportedType(key.toString());
}
public void verifyRedirectBindingSignature(PublicKey publicKey, String paramKey)
throws VerificationException {
String request = facade.getRequest().getQueryParamValue(paramKey);
String algorithm =
facade.getRequest().getQueryParamValue(GeneralConstants.SAML_SIG_ALG_REQUEST_KEY);
String signature =
facade.getRequest().getQueryParamValue(GeneralConstants.SAML_SIGNATURE_REQUEST_KEY);
String decodedAlgorithm =
facade.getRequest().getQueryParamValue(GeneralConstants.SAML_SIG_ALG_REQUEST_KEY);
if (request == null) {
throw new VerificationException("SAML Request was null");
}
if (algorithm == null) throw new VerificationException("SigAlg was null");
if (signature == null) throw new VerificationException("Signature was null");
// Shibboleth doesn't sign the document for redirect binding.
// todo maybe a flag?
String relayState = facade.getRequest().getQueryParamValue(GeneralConstants.RELAY_STATE);
KeycloakUriBuilder builder = KeycloakUriBuilder.fromPath("/").queryParam(paramKey, request);
if (relayState != null) {
builder.queryParam(GeneralConstants.RELAY_STATE, relayState);
}
builder.queryParam(GeneralConstants.SAML_SIG_ALG_REQUEST_KEY, algorithm);
String rawQuery = builder.build().getRawQuery();
try {
// byte[] decodedSignature = RedirectBindingUtil.urlBase64Decode(signature);
byte[] decodedSignature = Base64.decode(signature);
SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.getFromXmlMethod(decodedAlgorithm);
Signature validator = signatureAlgorithm.createSignature(); // todo plugin signature alg
validator.initVerify(publicKey);
validator.update(rawQuery.getBytes("UTF-8"));
if (!validator.verify(decodedSignature)) {
throw new VerificationException("Invalid query param signature");
}
} catch (Exception e) {
throw new VerificationException(e);
}
}