public void DecryptEncryptedKey_KeyInfoEncryptedKey()
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
string xml = "<root> <child>sample</child> </root>";
doc.LoadXml(xml);
var random = new SecureRandom();
var keydata = new byte[256 / 8];
random.NextBytes(keydata);
var param = new KeyParameter(keydata);
keydata = new byte[128 / 8];
random.NextBytes(keydata);
var innerParam = new KeyParameter(keydata);
keydata = new byte[192 / 8];
random.NextBytes(keydata);
var outerParam = new KeyParameter(keydata);
XmlDecryption exml = new XmlDecryption(doc);
exml.AddKeyNameMapping("aes", param);
EncryptedKey ekey = new EncryptedKey();
byte[] encKeyBytes = XmlEncryption.EncryptKey(outerParam.GetKey(), param);
ekey.CipherData = new CipherData(encKeyBytes);
ekey.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
ekey.Id = "Key_ID";
ekey.KeyInfo = new KeyInfo();
ekey.KeyInfo.AddClause(new KeyInfoName("aes"));
KeyInfo topLevelKeyInfo = new KeyInfo();
topLevelKeyInfo.AddClause(new KeyInfoEncryptedKey(ekey));
EncryptedKey ekeyTopLevel = new EncryptedKey();
byte[] encTopKeyBytes = XmlEncryption.EncryptKey(innerParam.GetKey(), outerParam);
ekeyTopLevel.CipherData = new CipherData(encTopKeyBytes);
ekeyTopLevel.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
ekeyTopLevel.KeyInfo = topLevelKeyInfo;
doc.LoadXml(ekeyTopLevel.GetXml().OuterXml);
byte[] decryptedKey = exml.DecryptEncryptedKey(ekeyTopLevel);
Assert.Equal(innerParam.GetKey(), decryptedKey);
EncryptedData eData = new EncryptedData();
eData.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
eData.KeyInfo = topLevelKeyInfo;
var decryptedAlg = exml.GetDecryptionKey(eData, NS.None);
Assert.Equal(outerParam.GetKey(), ((KeyParameter)decryptedAlg).GetKey());
}
public static void Decrypt(XmlDocument doc, RsaKeyParameters rsaKey, string keyName)
{
var encrypted = new XmlDecryption(doc);
encrypted.AddKeyNameMapping(keyName, rsaKey);
encrypted.DecryptDocument();
}
public void Encrypt_DecryptDocument_AES()
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
string xml = "<root> <child>sample</child> </root>";
doc.LoadXml(xml);
var aes = CipherUtilities.GetCipher("AES/CBC/ZEROBYTEPADDING");
var random = new SecureRandom();
var ivdata = new byte[128 / 8];
var keydata = new byte[256 / 8];
random.NextBytes(ivdata);
random.NextBytes(keydata);
var param = new ParametersWithIV(new KeyParameter(keydata), ivdata);
XmlEncryption exml = new XmlEncryption();
exml.AddKeyNameMapping("aes", param);
EncryptedData ed = exml.Encrypt(doc.DocumentElement, "aes");
doc.LoadXml(ed.GetXml().OuterXml);
XmlDecryption exmlDecryptor = new XmlDecryption(doc);
exmlDecryptor.AddKeyNameMapping("aes", param);
exmlDecryptor.DecryptDocument();
Assert.Equal(xml, doc.OuterXml);
}
public void GetDecryptionKey_CarriedKeyName()
{
var random = new SecureRandom();
var ivdata = new byte[128 / 8];
var keydata = new byte[256 / 8];
random.NextBytes(ivdata);
random.NextBytes(keydata);
var param = new ParametersWithIV(new KeyParameter(keydata), ivdata);
keydata = new byte[128 / 8];
random.NextBytes(ivdata);
random.NextBytes(keydata);
var innerParam = new ParametersWithIV(new KeyParameter(keydata), ivdata);
EncryptedData edata = new EncryptedData();
edata.KeyInfo = new KeyInfo();
edata.KeyInfo.AddClause(new KeyInfoName("aes"));
EncryptedKey ekey = new EncryptedKey();
byte[] encKeyBytes = XmlEncryption.EncryptKey(((KeyParameter)innerParam.Parameters).GetKey(), (KeyParameter)param.Parameters);
ekey.CipherData = new CipherData(encKeyBytes);
ekey.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
ekey.CarriedKeyName = "aes";
ekey.KeyInfo = new KeyInfo();
ekey.KeyInfo.AddClause(new KeyInfoName("another_aes"));
XmlDocument doc = new XmlDocument();
doc.LoadXml(ekey.GetXml().OuterXml);
XmlDecryption exml = new XmlDecryption(doc);
exml.AddKeyNameMapping("another_aes", param);
var decryptedAlg = exml.GetDecryptionKey(edata, NS.XmlEncAES256Url);
Assert.IsType <KeyParameter>(decryptedAlg);
Assert.Equal(((KeyParameter)innerParam.Parameters).GetKey(), ((KeyParameter)decryptedAlg).GetKey());
}
private XmlDocument GetTransformedOutput(XmlDocument doc, string nodeToEncrypt)
{
var aes = CipherUtilities.GetCipher("AES/CBC/PKCS7");
var random = new SecureRandom();
var keyData = new byte[aes.GetBlockSize()];
var ivData = new byte[aes.GetBlockSize()];
random.NextBytes(ivData);
random.NextBytes(keyData);
var key = new ParametersWithIV(new KeyParameter(keyData), ivData);
var encryptedXml = new XmlEncryption();
encryptedXml.AddKeyNameMapping("aes", key);
XmlElement elementToEncrypt = (XmlElement)doc.DocumentElement.SelectSingleNode(nodeToEncrypt);
EncryptedData encryptedData = encryptedXml.Encrypt(elementToEncrypt, "aes");
XmlDecryption.ReplaceElement(elementToEncrypt, encryptedData, false);
XmlNamespaceManager xmlNamespaceManager = new XmlNamespaceManager(doc.NameTable);
xmlNamespaceManager.AddNamespace("enc", XmlNameSpace.Url[NS.XmlEncNamespaceUrl]);
XmlElement encryptedNode = (XmlElement)doc.DocumentElement.SelectSingleNode("//enc:EncryptedData", xmlNamespaceManager);
encryptedNode.SetAttribute("ID", "#_0");
transform.LoadInput(doc);
var dencryptedXml = new XmlDecryption();
dencryptedXml.AddKeyNameMapping("aes", key);
transform.XmlDecryption = dencryptedXml;
XmlDocument transformedDocument = (XmlDocument)transform.GetOutput();
transform.XmlDecryption = null;
return(transformedDocument);
}
public void GetDecryptionKey_KeyInfoName()
{
var random = new SecureRandom();
var ivdata = new byte[128 / 8];
var keydata = new byte[256 / 8];
random.NextBytes(ivdata);
random.NextBytes(keydata);
var param = new ParametersWithIV(new KeyParameter(keydata), ivdata);
EncryptedData edata = new EncryptedData();
edata.KeyInfo = new KeyInfo();
edata.KeyInfo.AddClause(new KeyInfoName("aes"));
XmlDecryption exml = new XmlDecryption();
exml.AddKeyNameMapping("aes", param);
var decryptedAlg = exml.GetDecryptionKey(edata, NS.None);
Assert.IsType <ParametersWithIV>(decryptedAlg);
Assert.Equal(((KeyParameter)param.Parameters).GetKey(), ((KeyParameter)((ParametersWithIV)decryptedAlg).Parameters).GetKey());
}
public void PropagatedNamespaces_XmlDecryptionTransform(bool addPropagatedNamespace, string expectedResult)
{
XmlDocument baseDocument = new XmlDocument();
baseDocument.LoadXml("<a><b><c xmlns=\"urn:foo\"/></b></a>");
var aes = CipherUtilities.GetCipher("AES/CBC/PKCS7");
var random = new SecureRandom();
var keyData = new byte[aes.GetBlockSize()];
var ivData = new byte[aes.GetBlockSize()];
random.NextBytes(ivData);
random.NextBytes(keyData);
var key = new ParametersWithIV(new KeyParameter(keyData), ivData);
XmlEncryption encryptedXml = new XmlEncryption(baseDocument);
XmlDecryption decryptedXml = new XmlDecryption(baseDocument);
encryptedXml.AddKeyNameMapping("key", key);
decryptedXml.AddKeyNameMapping("key", key);
XmlElement bElement = (XmlElement)baseDocument.DocumentElement.SelectSingleNode("b");
EncryptedData encryptedData = encryptedXml.Encrypt(bElement, "key");
XmlDecryption.ReplaceElement(bElement, encryptedData, false);
XmlDecryptionTransform decryptionTransform = new XmlDecryptionTransform();
decryptionTransform.XmlDecryption = decryptedXml;
decryptionTransform.LoadInput(baseDocument);
if (addPropagatedNamespace)
{
decryptionTransform.PropagatedNamespaces.Add("f", "urn:foo");
}
XmlDocument decryptedDocument = (XmlDocument)decryptionTransform.GetOutput(typeof(XmlDocument));
Assert.Equal(expectedResult, decryptedDocument.OuterXml);
}