public static void Encrypt(Stream toEncrypt, RsaKeyParameters key, out KeyInfo keyInfo, out EncryptionMethod encryptionMethod, out CipherData cipherData)
{
var random = new SecureRandom();
var keyData = new byte[128 / 8];
var ivData = new byte[128 / 8];
random.NextBytes(ivData);
random.NextBytes(keyData);
var sessionKey = new ParametersWithIV(new KeyParameter(keyData), ivData);
encryptionMethod = new EncryptionMethod(NS.XmlEncAES128Url);
keyInfo = new KeyInfo();
EncryptedKey encKey;
keyInfo.AddClause(
new KeyInfoEncryptedKey(
encKey = new EncryptedKey()
{
CipherData = new CipherData(XmlEncryption.EncryptKey(keyData, key, useOAEP: true)),
EncryptionMethod = new EncryptionMethod(NS.XmlEncRSAOAEPUrl)
}));
encKey.KeyInfo.AddClause(new RsaKeyValue(key));
byte[] dataToEncrypt = new byte[toEncrypt.Length];
toEncrypt.Read(dataToEncrypt, 0, (int)toEncrypt.Length);
var encryptedXml = new XmlEncryption();
encryptedXml.SetPadding("PKCS7");
encryptedXml.SetMode("CBC");
byte[] encryptedData = encryptedXml.EncryptData(dataToEncrypt, sessionKey);
cipherData = new CipherData(encryptedData);
}
public void EncryptData_Xml_SymmetricAlgorithmNull()
{
XmlDocument doc = new XmlDocument();
doc.LoadXml("<root />");
XmlEncryption ex = new XmlEncryption();
Assert.Throws <ArgumentNullException>(() => ex.EncryptData(doc.DocumentElement, null, true));
}
public void RoundtripSample1()
{
using (StringWriter sw = new StringWriter())
{
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.LoadXml("<root> <child>sample</child> </root>");
XmlElement body = doc.DocumentElement;
var aes = CipherUtilities.GetCipher("AES/CBC/ZEROBYTEPADDING");
var ivdata = Convert.FromBase64String("pBUM5P03rZ6AE4ZK5EyBrw==");
var keydata = Convert.FromBase64String("o/ilseZu+keLBBWGGPlUHweqxIPc4gzZEFWr2nBt640=");
var param = new ParametersWithIV(new KeyParameter(keydata), ivdata);
XmlEncryption exml = new XmlEncryption();
byte[] encrypted = exml.EncryptData(body, param, false);
EncryptedData edata = new EncryptedData();
edata.Type = XmlNameSpace.Url[NS.XmlEncElementUrl];
edata.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
EncryptedKey ekey = new EncryptedKey();
byte[] encKeyBytes = keydata;
ekey.CipherData = new CipherData(encKeyBytes);
ekey.EncryptionMethod = new EncryptionMethod(NS.XmlEncRSA15Url);
DataReference dr = new DataReference();
dr.Uri = "_0";
ekey.AddReference(dr);
edata.KeyInfo.AddClause(new KeyInfoEncryptedKey(ekey));
ekey.KeyInfo.AddClause(new RsaKeyValue());
edata.CipherData.CipherValue = encrypted;
XmlDecryption.ReplaceElement(doc.DocumentElement, edata, false);
doc.Save(new XmlTextWriter(sw));
}
{
var aes = CipherUtilities.GetCipher("AES/CBC/ZEROBYTEPADDING");
var random = new SecureRandom();
var ivdata = new byte[aes.GetBlockSize()];
var keydata = Convert.FromBase64String("o/ilseZu+keLBBWGGPlUHweqxIPc4gzZEFWr2nBt640=");
random.NextBytes(ivdata);
var param = new ParametersWithIV(new KeyParameter(keydata), ivdata);
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.LoadXml(sw.ToString());
XmlDecryption encxml = new XmlDecryption(doc);
EncryptedData edata = new EncryptedData();
edata.LoadXml(doc.DocumentElement);
encxml.ReplaceData(doc.DocumentElement, encxml.DecryptData(edata, param));
}
}
}
public void DecryptData_CipherReference_IdUri()
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
string xml = "<root> <child>sample</child> </root>";
doc.LoadXml(xml);
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(doc);
XmlDecryption dexml = new XmlDecryption(doc);
string cipherValue = Convert.ToBase64String(exml.EncryptData(Encoding.UTF8.GetBytes(xml), param));
EncryptedData ed = new EncryptedData();
ed.Type = XmlNameSpace.Url[NS.XmlEncElementUrl];
ed.EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url);
ed.CipherData = new CipherData();
ed.CipherData.CipherReference = new CipherReference("#ID_0");
string xslt = "<xsl:stylesheet version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\"><xsl:template match = \"/\"><xsl:value-of select=\".\" /></xsl:template></xsl:stylesheet>";
XmlDsigXsltTransform xsltTransform = new XmlDsigXsltTransform();
XmlDocument xsltDoc = new XmlDocument();
xsltDoc.LoadXml(xslt);
xsltTransform.LoadInnerXml(xsltDoc.ChildNodes);
ed.CipherData.CipherReference.AddTransform(xsltTransform);
ed.CipherData.CipherReference.AddTransform(new XmlDsigBase64Transform());
doc.LoadXml("<root></root>");
XmlNode encryptedDataNode = doc.ImportNode(ed.GetXml(), true);
doc.DocumentElement.AppendChild(encryptedDataNode);
XmlElement cipherDataByReference = doc.CreateElement("CipherData");
cipherDataByReference.SetAttribute("ID", "ID_0");
cipherDataByReference.InnerText = cipherValue;
doc.DocumentElement.AppendChild(cipherDataByReference);
string decryptedXmlString = Encoding.UTF8.GetString(dexml.DecryptData(ed, param));
Assert.Equal(xml, decryptedXmlString);
}
public void EncryptData_Xml_XmlElementNull()
{
XmlEncryption ex = new XmlEncryption();
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);
Assert.Throws <ArgumentNullException>(() => ex.EncryptData(null, param, true));
}
private static void EncryptElement(XmlDocument doc, string elementName, ICipherParameters key)
{
var elementToEncrypt = (XmlElement)doc.GetElementsByTagName(elementName)[0];
var encryptedXml = new XmlEncryption();
var encryptedData = new EncryptedData()
{
Type = XmlNameSpace.Url[NS.XmlEncElementUrl],
EncryptionMethod = new EncryptionMethod(GetEncryptionMethodName(key))
};
encryptedData.CipherData.CipherValue = encryptedXml.EncryptData(elementToEncrypt, key, false);
XmlDecryption.ReplaceElement(elementToEncrypt, encryptedData, false);
}
private static void Encrypt(XmlDocument doc, string elementName, string encryptionElementID, RsaKeyParameters rsaKey, string keyName, bool useOAEP)
{
var elementToEncrypt = (XmlElement)doc.GetElementsByTagName(elementName)[0];
var sessionKeyData = EncryptingAndDecryptingSymmetric.GenerateBlock(256);
var sessionKeyIV = EncryptingAndDecryptingSymmetric.GenerateBlock(128);
var sessionKey = new ParametersWithIV(new KeyParameter(sessionKeyData), sessionKeyIV);
var encryptedKey = new EncryptedKey()
{
CipherData = new CipherData(XmlEncryption.EncryptKey(sessionKeyData, rsaKey, useOAEP)),
EncryptionMethod = new EncryptionMethod(useOAEP ? NS.XmlEncRSAOAEPUrl : NS.XmlEncRSA15Url)
};
encryptedKey.AddReference(new DataReference()
{
Uri = "#" + encryptionElementID
});
var encryptedData = new EncryptedData()
{
Type = XmlNameSpace.Url[NS.XmlEncElementUrl],
Id = encryptionElementID,
EncryptionMethod = new EncryptionMethod(NS.XmlEncAES256Url)
};
encryptedData.KeyInfo.AddClause(new KeyInfoEncryptedKey(encryptedKey));
encryptedKey.KeyInfo.AddClause(new KeyInfoName()
{
Value = keyName
});
var encryptedXml = new XmlEncryption();
encryptedData.CipherData.CipherValue = encryptedXml.EncryptData(elementToEncrypt, sessionKey, false);
XmlDecryption.ReplaceElement(elementToEncrypt, encryptedData, false);
}
private static void Encrypt(XmlDocument doc, string elementName, string encryptionElementID, ICipherParameters key, string keyName, Func <ICipherParameters> innerKeyFactory)
{
var elementToEncrypt = (XmlElement)doc.GetElementsByTagName(elementName)[0];
ICipherParameters innerKey = innerKeyFactory();
var encryptedKey = new EncryptedKey()
{
CipherData = new CipherData(XmlEncryption.EncryptKey(((KeyParameter)((ParametersWithIV)innerKey).Parameters).GetKey(), (KeyParameter)((ParametersWithIV)key).Parameters)),
EncryptionMethod = new EncryptionMethod(EncryptingAndDecryptingSymmetric.GetEncryptionMethodName(key, keyWrap: true))
};
encryptedKey.AddReference(new DataReference()
{
Uri = "#" + encryptionElementID
});
var encryptedData = new EncryptedData()
{
Type = XmlNameSpace.Url[NS.XmlEncElementUrl],
Id = encryptionElementID,
EncryptionMethod = new EncryptionMethod(EncryptingAndDecryptingSymmetric.GetEncryptionMethodName(innerKey, keyWrap: false))
};
encryptedData.KeyInfo.AddClause(new KeyInfoEncryptedKey(encryptedKey));
encryptedKey.KeyInfo.AddClause(new KeyInfoName()
{
Value = keyName
});
var encryptedXml = new XmlEncryption();
encryptedData.CipherData.CipherValue = encryptedXml.EncryptData(elementToEncrypt, innerKey, false);
XmlDecryption.ReplaceElement(elementToEncrypt, encryptedData, false);
}
public void EncryptData_SymmetricAlgorithmNull()
{
XmlEncryption ex = new XmlEncryption();
Assert.Throws <ArgumentNullException>(() => ex.EncryptData(new byte[16], null));
}
