/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.ws.security.str;
import org.apache.ws.security.CustomTokenPrincipal;
import org.apache.ws.security.SAMLTokenPrincipal;
import org.apache.ws.security.WSConstants;
import org.apache.ws.security.WSDerivedKeyTokenPrincipal;
import org.apache.ws.security.WSDocInfo;
import org.apache.ws.security.WSPasswordCallback;
import org.apache.ws.security.WSSecurityEngine;
import org.apache.ws.security.WSSecurityEngineResult;
import org.apache.ws.security.WSSecurityException;
import org.apache.ws.security.components.crypto.Crypto;
import org.apache.ws.security.handler.RequestData;
import org.apache.ws.security.message.token.BinarySecurity;
import org.apache.ws.security.message.token.DerivedKeyToken;
import org.apache.ws.security.message.token.Reference;
import org.apache.ws.security.message.token.SecurityContextToken;
import org.apache.ws.security.message.token.SecurityTokenReference;
import org.apache.ws.security.message.token.UsernameToken;
import org.apache.ws.security.processor.Processor;
import org.apache.ws.security.saml.SAMLKeyInfo;
import org.apache.ws.security.saml.SAMLUtil;
import org.apache.ws.security.saml.ext.AssertionWrapper;
import org.apache.ws.security.saml.ext.OpenSAMLUtil;
import org.apache.ws.security.util.Base64;
import org.apache.ws.security.util.WSSecurityUtil;
import org.w3c.dom.Element;
import java.security.Principal;
import java.security.PublicKey;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import javax.security.auth.callback.Callback;
import javax.xml.namespace.QName;
/**
* This implementation of STRParser is for parsing a SecurityTokenReference element, found in the
* KeyInfo element associated with a Signature element.
*/
public class SignatureSTRParser implements STRParser {
/**
* The Signature method. This is used when deriving a key to use for verifying the signature.
*/
public static final String SIGNATURE_METHOD = "signature_method";
/**
* The secret key length. This is used when deriving a key from a Username token for the
* non-standard WSE implementation.
*/
public static final String SECRET_KEY_LENGTH = "secret_key_length";
private X509Certificate[] certs;
private byte[] secretKey;
private PublicKey publicKey;
private Principal principal;
private boolean trustedCredential;
private REFERENCE_TYPE referenceType;
/**
* Parse a SecurityTokenReference element and extract credentials.
*
* @param strElement The SecurityTokenReference element
* @param data the RequestData associated with the request
* @param wsDocInfo The WSDocInfo object to access previous processing results
* @param parameters A set of implementation-specific parameters
* @throws WSSecurityException
*/
public void parseSecurityTokenReference(
Element strElement,
RequestData data,
WSDocInfo wsDocInfo,
Map<String, Object> parameters
) throws WSSecurityException {
boolean bspCompliant = true;
Crypto crypto = data.getSigCrypto();
if (data.getWssConfig() != null) {
bspCompliant = data.getWssConfig().isWsiBSPCompliant();
}
SecurityTokenReference secRef = new SecurityTokenReference(strElement, bspCompliant);
//
// Here we get some information about the document that is being
// processed, in particular the crypto implementation, and already
// detected BST that may be used later during dereferencing.
//
String uri = null;
if (secRef.containsReference()) {
uri = secRef.getReference().getURI();
if (uri.charAt(0) == '#') {
uri = uri.substring(1);
}
referenceType = REFERENCE_TYPE.DIRECT_REF;
} else if (secRef.containsKeyIdentifier()) {
uri = secRef.getKeyIdentifierValue();
if (SecurityTokenReference.THUMB_URI.equals(secRef.getKeyIdentifierValueType())) {
referenceType = REFERENCE_TYPE.THUMBPRINT_SHA1;
} else {
referenceType = REFERENCE_TYPE.KEY_IDENTIFIER;
}
}
WSSecurityEngineResult result = wsDocInfo.getResult(uri);
if (result != null) {
processPreviousResult(result, secRef, data, parameters, bspCompliant);
} else if (secRef.containsReference()) {
Reference reference = secRef.getReference();
// Try asking the CallbackHandler for the secret key
secretKey = getSecretKeyFromToken(uri, reference.getValueType(), data);
principal = new CustomTokenPrincipal(uri);
if (secretKey == null) {
Element token =
secRef.getTokenElement(strElement.getOwnerDocument(), wsDocInfo, data.getCallbackHandler());
QName el = new QName(token.getNamespaceURI(), token.getLocalName());
if (el.equals(WSSecurityEngine.BINARY_TOKEN)) {
Processor proc = data.getWssConfig().getProcessor(WSSecurityEngine.BINARY_TOKEN);
List<WSSecurityEngineResult> bstResult =
proc.handleToken(token, data, wsDocInfo);
BinarySecurity bstToken =
(BinarySecurity)bstResult.get(0).get(WSSecurityEngineResult.TAG_BINARY_SECURITY_TOKEN);
if (bspCompliant) {
BSPEnforcer.checkBinarySecurityBSPCompliance(secRef, bstToken);
}
certs = (X509Certificate[])bstResult.get(0).get(WSSecurityEngineResult.TAG_X509_CERTIFICATES);
secretKey = (byte[])bstResult.get(0).get(WSSecurityEngineResult.TAG_SECRET);
principal = (Principal)bstResult.get(0).get(WSSecurityEngineResult.TAG_PRINCIPAL);
} else if (el.equals(WSSecurityEngine.SAML_TOKEN)
|| el.equals(WSSecurityEngine.SAML2_TOKEN)) {
Processor proc = data.getWssConfig().getProcessor(WSSecurityEngine.SAML_TOKEN);
//
// Just check to see whether the token was processed or not
//
Element processedToken =
secRef.findProcessedTokenElement(
strElement.getOwnerDocument(), wsDocInfo,
data.getCallbackHandler(), uri, secRef.getReference().getValueType()
);
AssertionWrapper assertion = null;
if (processedToken == null) {
List<WSSecurityEngineResult> samlResult =
proc.handleToken(token, data, wsDocInfo);
assertion =
(AssertionWrapper)samlResult.get(0).get(
WSSecurityEngineResult.TAG_SAML_ASSERTION
);
} else {
assertion = new AssertionWrapper(processedToken);
assertion.parseHOKSubject(data, wsDocInfo);
}
if (bspCompliant) {
BSPEnforcer.checkSamlTokenBSPCompliance(secRef, assertion);
}
SAMLKeyInfo keyInfo = assertion.getSubjectKeyInfo();
X509Certificate[] foundCerts = keyInfo.getCerts();
if (foundCerts != null && foundCerts.length > 0) {
certs = new X509Certificate[]{foundCerts[0]};
}
secretKey = keyInfo.getSecret();
principal = createPrincipalFromSAML(assertion);
} else if (el.equals(WSSecurityEngine.ENCRYPTED_KEY)) {
if (bspCompliant) {
BSPEnforcer.checkEncryptedKeyBSPCompliance(secRef);
}
Processor proc = data.getWssConfig().getProcessor(WSSecurityEngine.ENCRYPTED_KEY);
List<WSSecurityEngineResult> encrResult =
proc.handleToken(token, data, wsDocInfo);
secretKey =
(byte[])encrResult.get(0).get(WSSecurityEngineResult.TAG_SECRET);
principal = new CustomTokenPrincipal(token.getAttribute("Id"));
}
}
} else if (secRef.containsX509Data() || secRef.containsX509IssuerSerial()) {
referenceType = REFERENCE_TYPE.ISSUER_SERIAL;
X509Certificate[] foundCerts = secRef.getX509IssuerSerial(crypto);
if (foundCerts != null && foundCerts.length > 0) {
certs = new X509Certificate[]{foundCerts[0]};
}
} else if (secRef.containsKeyIdentifier()) {
if (secRef.getKeyIdentifierValueType().equals(SecurityTokenReference.ENC_KEY_SHA1_URI)) {
if (bspCompliant) {
BSPEnforcer.checkEncryptedKeyBSPCompliance(secRef);
}
String id = secRef.getKeyIdentifierValue();
secretKey =
getSecretKeyFromToken(id, SecurityTokenReference.ENC_KEY_SHA1_URI, data);
principal = new CustomTokenPrincipal(id);
} else if (WSConstants.WSS_SAML_KI_VALUE_TYPE.equals(secRef.getKeyIdentifierValueType())
|| WSConstants.WSS_SAML2_KI_VALUE_TYPE.equals(secRef.getKeyIdentifierValueType())) {
parseSAMLKeyIdentifier(secRef, wsDocInfo, data, bspCompliant);
} else {
parseBSTKeyIdentifier(secRef, crypto, wsDocInfo, data, bspCompliant);
}
} else {
throw new WSSecurityException(
WSSecurityException.INVALID_SECURITY,
"unsupportedKeyInfo",
new Object[]{strElement.toString()}
);
}
if (certs != null && certs.length > 0 && principal == null) {
principal = certs[0].getSubjectX500Principal();
}
}
/**
* Get the X509Certificates associated with this SecurityTokenReference
* @return the X509Certificates associated with this SecurityTokenReference
*/
public X509Certificate[] getCertificates() {
return certs;
}
/**
* Get the Principal associated with this SecurityTokenReference
* @return the Principal associated with this SecurityTokenReference
*/
public Principal getPrincipal() {
return principal;
}
/**
* Get the PublicKey associated with this SecurityTokenReference
* @return the PublicKey associated with this SecurityTokenReference
*/
public PublicKey getPublicKey() {
return publicKey;
}
/**
* Get the Secret Key associated with this SecurityTokenReference
* @return the Secret Key associated with this SecurityTokenReference
*/
public byte[] getSecretKey() {
return secretKey;
}
/**
* Get whether the returned credential is already trusted or not. This is currently
* applicable in the case of a credential extracted from a trusted HOK SAML Assertion,
* and a BinarySecurityToken that has been processed by a Validator. In these cases,
* the SignatureProcessor does not need to verify trust on the credential.
* @return true if trust has already been verified on the returned Credential
*/
public boolean isTrustedCredential() {
return trustedCredential;
}
/**
* Get how the certificates were referenced
* @return how the certificates were referenced
*/
public REFERENCE_TYPE getCertificatesReferenceType() {
return referenceType;
}
/**
* A method to create a Principal from a SAML Assertion
* @param assertion An AssertionWrapper object
* @return A principal
*/
private Principal createPrincipalFromSAML(
AssertionWrapper assertion
) {
SAMLTokenPrincipal samlPrincipal = new SAMLTokenPrincipal(assertion);
String confirmMethod = null;
List<String> methods = assertion.getConfirmationMethods();
if (methods != null && methods.size() > 0) {
confirmMethod = methods.get(0);
}
if (OpenSAMLUtil.isMethodHolderOfKey(confirmMethod) && assertion.isSigned()) {
trustedCredential = true;
}
return samlPrincipal;
}
/**
* Get the Secret Key from a CallbackHandler
* @param id The id of the element
* @param type The type of the element (can be null)
* @param cb The CallbackHandler object
* @return A Secret Key
* @throws WSSecurityException
*/
private byte[] getSecretKeyFromToken(
String id,
String type,
RequestData data
) throws WSSecurityException {
if (id.charAt(0) == '#') {
id = id.substring(1);
}
WSPasswordCallback pwcb =
new WSPasswordCallback(id, null, type, WSPasswordCallback.SECRET_KEY, data);
try {
Callback[] callbacks = new Callback[]{pwcb};
if (data.getCallbackHandler() != null) {
data.getCallbackHandler().handle(callbacks);
return pwcb.getKey();
}
} catch (Exception e) {
throw new WSSecurityException(
WSSecurityException.FAILURE,
"noPassword",
new Object[] {id},
e
);
}
return null;
}
/**
* Parse the KeyIdentifier for a SAML Assertion
*/
private void parseSAMLKeyIdentifier(
SecurityTokenReference secRef,
WSDocInfo wsDocInfo,
RequestData data,
boolean bspCompliant
) throws WSSecurityException {
String valueType = secRef.getKeyIdentifierValueType();
secretKey = getSecretKeyFromToken(secRef.getKeyIdentifierValue(), valueType, data);
if (secretKey == null) {
AssertionWrapper assertion =
SAMLUtil.getAssertionFromKeyIdentifier(
secRef, secRef.getElement(), data, wsDocInfo
);
if (bspCompliant) {
BSPEnforcer.checkSamlTokenBSPCompliance(secRef, assertion);
}
SAMLKeyInfo samlKi =
SAMLUtil.getCredentialFromSubject(assertion, data, wsDocInfo, bspCompliant);
X509Certificate[] foundCerts = samlKi.getCerts();
if (foundCerts != null && foundCerts.length > 0) {
certs = new X509Certificate[]{foundCerts[0]};
}
secretKey = samlKi.getSecret();
publicKey = samlKi.getPublicKey();
principal = createPrincipalFromSAML(assertion);
}
}
/**
* Parse the KeyIdentifier for a BinarySecurityToken
*/
private void parseBSTKeyIdentifier(
SecurityTokenReference secRef,
Crypto crypto,
WSDocInfo wsDocInfo,
RequestData data,
boolean bspCompliant
) throws WSSecurityException {
if (bspCompliant) {
BSPEnforcer.checkBinarySecurityBSPCompliance(secRef, null);
}
String valueType = secRef.getKeyIdentifierValueType();
if (WSConstants.WSS_KRB_KI_VALUE_TYPE.equals(valueType)) {
secretKey =
getSecretKeyFromToken(secRef.getKeyIdentifierValue(), valueType, data);
if (secretKey == null) {
byte[] keyBytes = secRef.getSKIBytes();
List<WSSecurityEngineResult> resultsList =
wsDocInfo.getResultsByTag(WSConstants.BST);
for (WSSecurityEngineResult bstResult : resultsList) {
BinarySecurity bstToken =
(BinarySecurity)bstResult.get(WSSecurityEngineResult.TAG_BINARY_SECURITY_TOKEN);
byte[] tokenDigest = WSSecurityUtil.generateDigest(bstToken.getToken());
if (Arrays.equals(tokenDigest, keyBytes)) {
secretKey = (byte[])bstResult.get(WSSecurityEngineResult.TAG_SECRET);
principal = (Principal)bstResult.get(WSSecurityEngineResult.TAG_PRINCIPAL);
break;
}
}
} else {
principal = new CustomTokenPrincipal(secRef.getKeyIdentifierValue());
}
} else {
X509Certificate[] foundCerts = secRef.getKeyIdentifier(crypto);
if (foundCerts == null) {
// The reference may be to a BST in the security header rather than in the keystore
if (SecurityTokenReference.SKI_URI.equals(valueType)) {
byte[] skiBytes = secRef.getSKIBytes();
List<WSSecurityEngineResult> resultsList =
wsDocInfo.getResultsByTag(WSConstants.BST);
for (WSSecurityEngineResult bstResult : resultsList) {
X509Certificate[] certs =
(X509Certificate[])bstResult.get(WSSecurityEngineResult.TAG_X509_CERTIFICATES);
if (certs != null
&& Arrays.equals(skiBytes, crypto.getSKIBytesFromCert(certs[0]))) {
principal = (Principal)bstResult.get(WSSecurityEngineResult.TAG_PRINCIPAL);
foundCerts = certs;
break;
}
}
} else if (SecurityTokenReference.THUMB_URI.equals(valueType)) {
String kiValue = secRef.getKeyIdentifierValue();
List<WSSecurityEngineResult> resultsList =
wsDocInfo.getResultsByTag(WSConstants.BST);
for (WSSecurityEngineResult bstResult : resultsList) {
X509Certificate[] certs =
(X509Certificate[])bstResult.get(WSSecurityEngineResult.TAG_X509_CERTIFICATES);
if (certs != null) {
try {
byte[] digest = WSSecurityUtil.generateDigest(certs[0].getEncoded());
if (Arrays.equals(Base64.decode(kiValue), digest)) {
principal = (Principal)bstResult.get(WSSecurityEngineResult.TAG_PRINCIPAL);
foundCerts = certs;
break;
}
} catch (CertificateEncodingException ex) {
throw new WSSecurityException(
WSSecurityException.SECURITY_TOKEN_UNAVAILABLE, "encodeError",
null, ex
);
}
}
}
}
}
if (foundCerts != null) {
certs = new X509Certificate[]{foundCerts[0]};
}
}
}
/**
* Process a previous security result
*/
private void processPreviousResult(
WSSecurityEngineResult result,
SecurityTokenReference secRef,
RequestData data,
Map<String, Object> parameters,
boolean bspCompliant
) throws WSSecurityException {
int action = ((Integer)result.get(WSSecurityEngineResult.TAG_ACTION)).intValue();
if (WSConstants.UT_NOPASSWORD == action || WSConstants.UT == action) {
if (bspCompliant) {
BSPEnforcer.checkUsernameTokenBSPCompliance(secRef);
}
UsernameToken usernameToken =
(UsernameToken)result.get(WSSecurityEngineResult.TAG_USERNAME_TOKEN);
usernameToken.setRawPassword(data);
if (usernameToken.isDerivedKey()) {
secretKey = (byte[])result.get(WSSecurityEngineResult.TAG_SECRET);
} else {
int keyLength = ((Integer)parameters.get(SECRET_KEY_LENGTH)).intValue();
secretKey = usernameToken.getSecretKey(keyLength);
}
principal = usernameToken.createPrincipal();
} else if (WSConstants.BST == action) {
if (bspCompliant) {
BinarySecurity token =
(BinarySecurity)result.get(
WSSecurityEngineResult.TAG_BINARY_SECURITY_TOKEN
);
BSPEnforcer.checkBinarySecurityBSPCompliance(secRef, token);
}
certs =
(X509Certificate[])result.get(WSSecurityEngineResult.TAG_X509_CERTIFICATES);
secretKey = (byte[])result.get(WSSecurityEngineResult.TAG_SECRET);
Boolean validatedToken =
(Boolean)result.get(WSSecurityEngineResult.TAG_VALIDATED_TOKEN);
if (validatedToken.booleanValue()) {
trustedCredential = true;
}
} else if (WSConstants.ENCR == action) {
if (bspCompliant) {
BSPEnforcer.checkEncryptedKeyBSPCompliance(secRef);
}
secretKey = (byte[])result.get(WSSecurityEngineResult.TAG_SECRET);
String id = (String)result.get(WSSecurityEngineResult.TAG_ID);
principal = new CustomTokenPrincipal(id);
} else if (WSConstants.SCT == action) {
secretKey = (byte[])result.get(WSSecurityEngineResult.TAG_SECRET);
SecurityContextToken sct =
(SecurityContextToken)result.get(
WSSecurityEngineResult.TAG_SECURITY_CONTEXT_TOKEN
);
principal = new CustomTokenPrincipal(sct.getIdentifier());
} else if (WSConstants.DKT == action) {
DerivedKeyToken dkt =
(DerivedKeyToken)result.get(WSSecurityEngineResult.TAG_DERIVED_KEY_TOKEN);
int keyLength = dkt.getLength();
if (keyLength <= 0) {
String algorithm = (String)parameters.get(SIGNATURE_METHOD);
keyLength = WSSecurityUtil.getKeyLength(algorithm);
}
byte[] secret = (byte[])result.get(WSSecurityEngineResult.TAG_SECRET);
secretKey = dkt.deriveKey(keyLength, secret);
principal = dkt.createPrincipal();
((WSDerivedKeyTokenPrincipal)principal).setSecret(secret);
} else if (WSConstants.ST_UNSIGNED == action || WSConstants.ST_SIGNED == action) {
AssertionWrapper assertion =
(AssertionWrapper)result.get(WSSecurityEngineResult.TAG_SAML_ASSERTION);
if (bspCompliant) {
BSPEnforcer.checkSamlTokenBSPCompliance(secRef, assertion);
}
SAMLKeyInfo keyInfo = assertion.getSubjectKeyInfo();
if (keyInfo == null) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLsecurity"
);
}
X509Certificate[] foundCerts = keyInfo.getCerts();
if (foundCerts != null) {
certs = new X509Certificate[]{foundCerts[0]};
}
secretKey = keyInfo.getSecret();
publicKey = keyInfo.getPublicKey();
principal = createPrincipalFromSAML(assertion);
}
}
}