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Ho un problema durante il tentativo di decodificare l'asserzione crittografata utilizzando SAML 2.0. La libreria che sto usando è OpenSAML librerie Java 2.5.2.Decrittografia dell'asserzione crittografata utilizzando SAML 2.0 in java con OpenSAML
L'affermazione cifrato appare così:
<EncryptedAssertion xmlns="urn:oasis:names:tc:SAML:2.0:assertion">
<enc:EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element"
xmlns:enc="http://www.w3.org/2001/04/xmlenc#">
<enc:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#aes256-cbc" />
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
<e:EncryptedKey xmlns:e="http://www.w3.org/2001/04/xmlenc#">
<e:EncryptionMethod
Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p">
<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
</e:EncryptionMethod>
<KeyInfo>
<o:SecurityTokenReference
xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-
1.0.xsd">
<o:KeyIdentifier
ValueType="http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-
1.1#ThumbprintSHA1"
EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-
message-security-1.0#Base64Binary">
1H3mV/pJAlVZAst/Dt0rqbBd67g=
</o:KeyIdentifier>
</o:SecurityTokenReference>
</KeyInfo>
<e:CipherData>
<e:CipherValue>
... ENCRYPTED KEY HERE ...
</e:CipherValue>
</e:CipherData>
</e:EncryptedKey>
</KeyInfo>
<enc:CipherData>
<enc:CipherValue>
... ENCRYPTED ASSERTIONS HERE ...
</enc:CipherValue>
</enc:CipherData>
</enc:EncryptedData>
</EncryptedAssertion>
ho fatto convertire la mia chiave privata che è in formato PEM per PKCS8 formato utilizzando il seguente comando openssl:
openssl pkcs8 -topk8 -nocrypt -inform PEM -in rsa_private_key.key -outform DER -out rsa_private_key.pk8
io sono pronto per prova a decodificare l'asserzione cifrata. Ecco il mio codice Java:
...
// Load the XML file and parse it.
File xmlFile = new File("data\\token.xml");
InputStream inputStream = new FileInputStream(xmlFile);
Document document = parserPoolManager.parse(inputStream);
Element metadataRoot = document.getDocumentElement();
// Unmarshall
UnmarshallerFactory unmarshallerFactory = Configuration.getUnmarshallerFactory();
Unmarshaller unmarshaller = unmarshallerFactory.getUnmarshaller(metadataRoot);
EncryptedAssertion encryptedAssertion = (EncryptedAssertion)unmarshaller.unmarshall(metadataRoot);
// Load the private key file.
File privateKeyFile = new File("data\\rsa_private_key.pk8");
FileInputStream inputStreamPrivateKey = new FileInputStream(privateKeyFile);
byte[] encodedPrivateKey = new byte[(int)privateKeyFile.length()];
inputStreamPrivateKey.read(encodedPrivateKey);
inputStreamPrivateKey.close();
// Create the private key.
PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(encodedPrivateKey);
RSAPrivateKey privateKey = (RSAPrivateKey)KeyFactory.getInstance("RSA").generatePrivate(privateKeySpec);
// Create the credentials.
BasicX509Credential decryptionCredential = new BasicX509Credential();
decryptionCredential.setPrivateKey(privateKey);
// Create a decrypter.
Decrypter decrypter = new Decrypter(null, new StaticKeyInfoCredentialResolver(decryptionCredential), new InlineEncryptedKeyResolver());
// Decrypt the assertion.
Assertion decryptedAssertion;
try
{
decryptedAssertion = decrypter.decrypt(encryptedAssertion);
}
...
L'esecuzione di questo codice risulta sempre impossibile da decrittografare l'asserzione. Ricevo i seguenti errori:
5473 [main] ERROR org.opensaml.xml.encryption.Decrypter - Error decrypting encrypted key
org.apache.xml.security.encryption.XMLEncryptionException: Key is too long for unwrapping
Original Exception was java.security.InvalidKeyException: Key is too long for unwrapping
at org.apache.xml.security.encryption.XMLCipher.decryptKey(Unknown Source)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:681)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:612)
at org.opensaml.xml.encryption.Decrypter.decryptUsingResolvedEncryptedKey(Decrypter.java:762)
at org.opensaml.xml.encryption.Decrypter.decryptDataToDOM(Decrypter.java:513)
at org.opensaml.xml.encryption.Decrypter.decryptDataToList(Decrypter.java:440)
at org.opensaml.xml.encryption.Decrypter.decryptData(Decrypter.java:401)
at org.opensaml.saml2.encryption.Decrypter.decryptData(Decrypter.java:141)
at org.opensaml.saml2.encryption.Decrypter.decrypt(Decrypter.java:69)
at DecrypterTool.main(DecrypterTool.java:121)
java.security.InvalidKeyException: Key is too long for unwrapping
at com.sun.crypto.provider.RSACipher.engineUnwrap(DashoA13*..)
at javax.crypto.Cipher.unwrap(DashoA13*..)
at org.apache.xml.security.encryption.XMLCipher.decryptKey(Unknown Source)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:681)
at org.opensaml.xml.encryption.Decrypter.decryptKey(Decrypter.java:612)
at org.opensaml.xml.encryption.Decrypter.decryptUsingResolvedEncryptedKey(Decrypter.java:762)
at org.opensaml.xml.encryption.Decrypter.decryptDataToDOM(Decrypter.java:513)
at org.opensaml.xml.encryption.Decrypter.decryptDataToList(Decrypter.java:440)
at org.opensaml.xml.encryption.Decrypter.decryptData(Decrypter.java:401)
at org.opensaml.saml2.encryption.Decrypter.decryptData(Decrypter.java:141)
at org.opensaml.saml2.encryption.Decrypter.decrypt(Decrypter.java:69)
at DecrypterTool.main(DecrypterTool.java:121)
5477 [main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedKey, valid decryption key could not be resolved
5477 [main] ERROR org.opensaml.xml.encryption.Decrypter - Failed to decrypt EncryptedData using either EncryptedData KeyInfoCredentialResolver or EncryptedKeyResolver + EncryptedKey KeyInfoCredentialResolver
5478 [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:524)
at org.opensaml.xml.encryption.Decrypter.decryptDataToList(Decrypter.java:440)
at org.opensaml.xml.encryption.Decrypter.decryptData(Decrypter.java:401)
at org.opensaml.saml2.encryption.Decrypter.decryptData(Decrypter.java:141)
at org.opensaml.saml2.encryption.Decrypter.decrypt(Decrypter.java:69)
at DecrypterTool.main(DecrypterTool.java:121)
Io davvero non so cosa sto facendo di sbagliato in questo caso. Ho convertito la mia chiave privata in pkcs8, ho caricato i miei dati XML SAML e l'ho riarrangiato nel tipo valido (EncryptedAssertion) e ho creato un decrittografato basato sulla mia chiave privata.
È possibile che sia correlato al formato di un ape per RSA? Sto usando la libreria di crittografia java predefinita.
Grazie!
non so il tuo problema esatto, ma ho dovuto sbattere la testa mentre si occupano di [tag: SAML] Ho trovato grande facilità utilizzando 'apache camel'. – Shahzeb
@Shahzeb Mi piacerebbe usare qualcos'altro, ma il mio cliente sta usando saml e non posso davvero cambiarlo.:( – thewalrusnp