我正在尝试与OpenSAML2（2.6.6）一起编写Java应用程序以解密加密的断言，但是我得到了：
[main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedKey, valid decryption key could not be resolved
[main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedData using either EncryptedData KeyInfoCredentialResolver or EncryptedKeyResolver + EncryptedKey KeyInfoCredentialResolver
[main] ERROR org.opensaml.saml2.encryption.Decrypter - SAML Decrypter encountered an error decrypting element content
这是我的Java代码（对不起，它仍然有很多调试输出）：
/*
* ****************************************************************************************************
* Original source from: https://stackoverflow.com/questions/9422545/decrypting-encrypted-assertion-using-saml-2-0-in-java-using-opensaml
* And hint about needed to add DefaultBootstrap.bootstrap() for OpenSAML 2.x: https://stackoverflow.com/questions/25066183/opensaml-error-receiving-correct-unmarshaller
* And hing about chain resolvers: https://www.programcreek.com/java-api-examples/index.php?api=org.opensaml.saml2.encryption.Decrypter
* ****************************************************************************************************
* ****************************************************************************************************
* ****************************************************************************************************
* ****************************************************************************************************
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.security.KeyFactory;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import java.util.List;
import org.opensaml.DefaultBootstrap;
import org.opensaml.saml2.core.Assertion;
import org.opensaml.saml2.core.EncryptedAssertion;
import org.opensaml.saml2.encryption.Decrypter;
import org.opensaml.saml2.encryption.EncryptedElementTypeEncryptedKeyResolver;
import org.opensaml.xml.Configuration;
import org.opensaml.xml.encryption.ChainingEncryptedKeyResolver;
import org.opensaml.xml.encryption.EncryptedKeyResolver;
import org.opensaml.xml.encryption.InlineEncryptedKeyResolver;
import org.opensaml.xml.encryption.SimpleRetrievalMethodEncryptedKeyResolver;
import org.opensaml.xml.io.Unmarshaller;
import org.opensaml.xml.io.UnmarshallerFactory;
import org.opensaml.xml.parse.BasicParserPool;
import org.opensaml.xml.security.keyinfo.StaticKeyInfoCredentialResolver;
import org.opensaml.xml.security.x509.BasicX509Credential;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class test_opensaml {
public static void main(String[] args) {
String PROGVERSION = "V1.00";
String xmlFileName = "";
String privateKeyFileName = "";
System.out.println("test_opensaml " + PROGVERSION);
if(args.length < 2) {
System.out.println("Command line is: java test_opensaml <signed_samlassertion_xml> <private_key_der>");
System.exit(0);
}
xmlFileName = args[0];
privateKeyFileName = args[1];
Logger logger = LoggerFactory.getLogger(test_opensaml.class);
logger.info("xmlFileName=[" + xmlFileName + "]");
logger.info("privateKeyFileName=[" + privateKeyFileName + "]\n");
try {
// Initialize the library
DefaultBootstrap.bootstrap();
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE Executing DefaultBootstrap.bootstrap() - e=[" + e + "]");
System.exit(-1);
}
InputStream inputStream = null;
// Load the XML file and parse it.
File xmlFile = new File(xmlFileName);
try {
inputStream = new FileInputStream(xmlFile);
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE LOADING ASSERTION XML FILE - e=[" + e + "]");
System.exit(-1);
}
BasicParserPool parserPoolManager = new BasicParserPool();
Document document = null;
Element metadataRoot = null;
try {
document = parserPoolManager.parse(inputStream);
metadataRoot = document.getDocumentElement();
System.out.println("metadataRoot.getNodeName()=[" + metadataRoot.getNodeName() + "]");
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE CREATING DOCUMENT FROM XML FILE - e=[" + e + "]");
System.exit(-1);
}
UnmarshallerFactory unmarshallerFactory = null;
Unmarshaller unmarshaller = null;
EncryptedAssertion encryptedAssertion = null;
try {
// Unmarshall
unmarshallerFactory = Configuration.getUnmarshallerFactory();
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE CREATING UNMARSHALLFACTORY - e=[" + e + "]");
System.exit(-1);
}
if (unmarshallerFactory == null) {
System.out.println("unmarshallerFactory is null");
} else {
System.out.println("unmarshallerFactory is OK/NOT-null");
}
try {
// Unmarshall
unmarshaller = unmarshallerFactory.getUnmarshaller(metadataRoot);
if (unmarshaller == null) {
System.out.println("unmarshaller is null");
} else {
System.out.println("unmarshaller is OK/NOT-null");
}
System.out.println("unmarshaller.getClass().getname=[" + unmarshaller.getClass().getName() + "]");
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE CREATING UNMARSHALLER - e=[" + e + "]");
System.exit(-1);
}
try {
// Unmarshall
encryptedAssertion = (EncryptedAssertion)unmarshaller.unmarshall(metadataRoot);
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR CREATING ENCRYPTEDASSERTION BY UNMARSHALLING - e=[" + e + "]");
e.printStackTrace();
System.exit(-1);
}
System.out.println("SUCCESS - CREATED ENCRYPTEDASSERTION BY UNMARSHALLING!!");
System.out.println("Will now try to load the PRIVATE KEY FILE...");
// Load the private key file.
File privateKeyFile = new File(privateKeyFileName);
FileInputStream inputStreamPrivateKey = null;
byte[] encodedPrivateKey = null;
try {
inputStreamPrivateKey = new FileInputStream(privateKeyFile);
encodedPrivateKey = new byte[(int)privateKeyFile.length()];
inputStreamPrivateKey.read(encodedPrivateKey);
inputStreamPrivateKey.close();
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE READING PRIVATE KEY FROM FILE - e=[" + e + "]");
System.exit(-1);
}
System.out.println("SUCCESS - READ/INPUT THE PRIVATE KEY FILE!!");
PKCS8EncodedKeySpec privateKeySpec = null;
RSAPrivateKey privateKey = null;
try {
// Create the private key.
privateKeySpec = new PKCS8EncodedKeySpec(encodedPrivateKey);
privateKey = (RSAPrivateKey)KeyFactory.getInstance("RSA").generatePrivate(privateKeySpec);
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE CREATING PRIVATE KEY - e=[" + e + "]");
System.exit(-1);
}
System.out.println("SUCCESS - CREATING THE PRIVATE KEY INSTANCE!!");
ChainingEncryptedKeyResolver keyResolver = new ChainingEncryptedKeyResolver();
keyResolver.getResolverChain().add(new InlineEncryptedKeyResolver());
keyResolver.getResolverChain().add(new EncryptedElementTypeEncryptedKeyResolver());
keyResolver.getResolverChain().add(new SimpleRetrievalMethodEncryptedKeyResolver());
System.out.println("Built a list of encrypted key resolvers...");
boolean successfulDecryption = false;
// Create the credentials.
BasicX509Credential decryptionCredential = new BasicX509Credential();
decryptionCredential.setPrivateKey(privateKey);
StaticKeyInfoCredentialResolver resolver = new StaticKeyInfoCredentialResolver(decryptionCredential);
// Create a decrypter.
Decrypter decrypter = new Decrypter(null, resolver, keyResolver);
decrypter.setRootInNewDocument(true);
// Decrypt the assertion.
Assertion decryptedAssertion = null;
System.out.println("WILL NOW TRY TO DECRYPT THE ENCRYPTED ASSERTION...");
try
{
decryptedAssertion = decrypter.decrypt(encryptedAssertion);
} catch (Exception e) {
System.out.println("** ERROR ** - ERROR WHILE DECRYPTING THE ASSERTION - e=[" + e + "]");
System.exit(-1);
}
System.out.println("SUCCESS - DECRYPTED THE ENCRYPTED ASSERTION - will now dump out the decrypted assertion...!!");
System.out.println("decryptedAssertion.toString=[" + decryptedAssertion.toString() + "]");
System.out.println("Finished...");
System.exit(0);
} // end main()
}
当我使用测试签名的断言（XML）和私钥运行它时，我得到以下输出。该程序正在Eclipse下运行，并使用Java 1.8 build 201：
test_opensaml V1.00
[main] INFO test_opensaml - xmlFileName=[E:\ECLIPSE-WORKSPACES\opensaml\opensaml\data\encrypted_assertion.xml]
[main] INFO test_opensaml - privateKeyFileName=[E:\ECLIPSE-WORKSPACES\opensaml\opensaml\data\geoaxis-gxaccess.com.private-key.der]
metadataRoot.getNodeName()=[saml:EncryptedAssertion]
unmarshallerFactory is OK/NOT-null
unmarshaller is OK/NOT-null
unmarshaller.getClass().getname=[org.opensaml.saml2.core.impl.EncryptedAssertionUnmarshaller]
SUCCESS - CREATED ENCRYPTEDASSERTION BY UNMARSHALLING!!
Will now try to load the PRIVATE KEY FILE...
SUCCESS - READ/INPUT THE PRIVATE KEY FILE!!
SUCCESS - CREATING THE PRIVATE KEY INSTANCE!!
Built a list of encrypted key resolvers...
WILL NOW TRY TO DECRYPT THE ENCRYPTED ASSERTION...
[main] ERROR org.opensaml.xml.encryption.Decrypter - Error decrypting encrypted key
org.apache.xml.security.encryption.XMLEncryptionException: Unwrapping failed
Original Exception was java.security.InvalidKeyException: Unwrapping failed
at org.apache.xml.security.encryption.XMLCipher.decryptKey(XMLCipher.java:1539)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:708)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:639)
at org.opensaml.xml.encryption.Decrypter.decryptUsingResolvedEncryptedKey(Decrypter.java:794)
at org.opensaml.xml.encryption.Decrypter.decryptDataToDOM(Decrypter.java:535)
at org.opensaml.xml.encryption.Decrypter.decryptDataToList(Decrypter.java:453)
at org.opensaml.xml.encryption.Decrypter.decryptData(Decrypter.java:414)
at org.opensaml.saml2.encryption.Decrypter.decryptData(Decrypter.java:141)
at org.opensaml.saml2.encryption.Decrypter.decrypt(Decrypter.java:69)
at test_opensaml.main(test_opensaml.java:193)
Caused by: java.security.InvalidKeyException: Unwrapping failed
at com.sun.crypto.provider.RSACipher.engineUnwrap(RSACipher.java:445)
at javax.crypto.Cipher.unwrap(Cipher.java:2549)
at org.apache.xml.security.encryption.XMLCipher.decryptKey(XMLCipher.java:1537)
... 9 more
Caused by: javax.crypto.BadPaddingException: Decryption error
at sun.security.rsa.RSAPadding.unpadOAEP(Unknown Source)
at sun.security.rsa.RSAPadding.unpad(Unknown Source)
at com.sun.crypto.provider.RSACipher.doFinal(RSACipher.java:363)
at com.sun.crypto.provider.RSACipher.engineUnwrap(RSACipher.java:440)
... 11 more
[main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedKey, valid decryption key could not be resolved
[main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedData using either EncryptedData KeyInfoCredentialResolver or EncryptedKeyResolver + EncryptedKey KeyInfoCredentialResolver
[main] ERROR org.opensaml.saml2.encryption.Decrypter - SAML Decrypter encountered an error decrypting element content
org.opensaml.xml.encryption.DecryptionException: Failed to decrypt EncryptedData
at org.opensaml.xml.encryption.Decrypter.decryptDataToDOM(Decrypter.java:546)
at org.opensaml.xml.encryption.Decrypter.decryptDataToList(Decrypter.java:453)
at org.opensaml.xml.encryption.Decrypter.decryptData(Decrypter.java:414)
at org.opensaml.saml2.encryption.Decrypter.decryptData(Decrypter.java:141)
at org.opensaml.saml2.encryption.Decrypter.decrypt(Decrypter.java:69)
at test_opensaml.main(test_opensaml.java:193)
** ERROR ** - ERROR WHILE DECRYPTING THE ASSERTION - e=[org.opensaml.xml.encryption.DecryptionException: Failed to decrypt EncryptedData]
由于这（至少对我来说）是未经测试的新代码，我想知道如何进一步诊断此问题？
是否还有其他日志记录或可能有助于找出问题所在或查明问题的东西？
我知道这听起来有点不寻常，但是，仅供参考，第三方现在给了我用来测试的签名断言和私钥，因此实际上我不是100％确定它们是否很好，所以我想知道是否可以在某个地方获取/下载已知有效的加密断言示例以及相应的私钥，以便我可以尝试使用已知良好的数据测试上面的代码？
谢谢， 吉姆
编辑：对不起，我忘了包含我一直在测试的加密断言的摘要：
<?xml version="1.0"?>
<saml:EncryptedAssertion xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">
<xenc:EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element" Id="_332ec9de74ee4a8b97b84694edb58ba9" xmlns:xenc="http://www.w3.org/2001/04/xmlenc#">
<xenc:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#aes256-cbc"/>
<ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<xenc:EncryptedKey Type="http://www.w3.org/2001/04/xmlenc#Element" Id="_d32f036453ed438b84783a21a2e2cca7">
<xenc:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p"/>
<xenc:CipherData>
<xenc:CipherValue>Rfn5PDApVSF3wTBgsiQsFn5rybj...EZoHpGvxDPv5kAhVw==</xenc:CipherValue>
</xenc:CipherData>
</xenc:EncryptedKey>
</ds:KeyInfo>
<xenc:CipherData>
<xenc:CipherValue>FTk8D8nGOTuZsunGifMEHtj...xiAvwSQ=</xenc:CipherValue>
</xenc:CipherData>
</xenc:EncryptedData>
</saml:EncryptedAssertion>
编辑2：对于熟悉OpenSAML和SAML的人：上面的签名断言有问题吗？我一直在进行一些其他测试，而且似乎没有一个解析程序能够找到该加密密钥，并且我注意到ds：Keyinfo嵌入在xenc：EncryptedData中，与xenc：CipherData处于同一级别。这是正常结构吗？应该由哪个链接解析器找到ds：Keyinfo？
答案 0 :(得分：0)
仅供参考，一旦我找到与样本加密断言匹配的正确私钥，我终于可以照常工作。
答案 1 :(得分：0)
根据您的更改，我遇到了 KEY LENGTH 已知错误，在点击以下链接后问题已解决
org.apache.xml.security.encryption.XMLEncryptionException: 非法的密钥大小 原始异常是 java.security.InvalidKeyException: Illegal key size