public void GetDecryptionIV_TripleDesUri()
{
EncryptedXml ex = new EncryptedXml();
EncryptedData encryptedData = new EncryptedData();
encryptedData.CipherData = new CipherData(new byte[16]);
Assert.Equal(8, ex.GetDecryptionIV(encryptedData, EncryptedXml.XmlEncTripleDESUrl).Length);
}
public void GetDecryptionIV_StringNullWithoutEncryptionMethod()
{
EncryptedXml ex = new EncryptedXml();
EncryptedData encryptedData = new EncryptedData();
encryptedData.CipherData = new CipherData(new byte[16]);
Assert.Throws <CryptographicException>(() => ex.GetDecryptionIV(encryptedData, null));
}
public void GetDecryptionIV_InvalidAlgorithmUri()
{
EncryptedXml ex = new EncryptedXml();
EncryptedData encryptedData = new EncryptedData();
encryptedData.CipherData = new CipherData(new byte[16]);
Assert.Throws <CryptographicException>(() => ex.GetDecryptionIV(encryptedData, "invalid"));
}
public void GetDecryptionIV_StringNull()
{
EncryptedXml ex = new EncryptedXml();
EncryptedData encryptedData = new EncryptedData();
encryptedData.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncAES256Url);
encryptedData.CipherData = new CipherData(new byte[16]);
Assert.Equal(new byte[16], ex.GetDecryptionIV(encryptedData, null));
}
public void GetDecryptionIV_StringNull()
{
// Added EncryptionMethod and CipherData to avoid a CryptographicException
EncryptedXml ex = new EncryptedXml();
EncryptedData encryptedData = new EncryptedData();
encryptedData.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncAES256Url);
encryptedData.CipherData = new CipherData(new byte[16]);
Assert.Null(ex.GetDecryptionIV(encryptedData, null));
}
public void GetDecryptionIV_StringNull()
{
EncryptedXml ex = new EncryptedXml();
Assert.IsNull(ex.GetDecryptionIV(new EncryptedData(), null));
}
public void GetDecryptionIV_EncryptedDataNull()
{
EncryptedXml ex = new EncryptedXml();
ex.GetDecryptionIV(null, EncryptedXml.XmlEncAES128Url);
}
public void GetDecryptionIV_EncryptedDataNull()
{
EncryptedXml ex = new EncryptedXml();
Assert.Throws <ArgumentNullException>(() => ex.GetDecryptionIV(null, EncryptedXml.XmlEncAES128Url));
}
private bool TryDecrypt(EncryptedType encryptedType, out byte[] plainText)
{
var xml = new EncryptedXml();
var keys = GetSecurityKeys(encryptedType);
var algorithm = encryptedType.EncryptionMethod.KeyAlgorithm;
foreach (var key in keys)
{
var crypto = GetCrypto(key);
if (!crypto.IsSupportedAlgorithm(algorithm, key))
{
continue;
}
var symmetric = null as SymmetricAlgorithm;
try
{
if (encryptedType is EncryptedData encryptedData)
{
if (!(key is SymmetricSecurityKey symmetricKey))
{
continue;
}
symmetric = crypto.CreateSymmetricAlgorithm(symmetricKey, algorithm);
symmetric.IV = xml.GetDecryptionIV(encryptedData, algorithm);
var pt = xml.DecryptData(encryptedData, symmetric);
plainText = pt;
return(true);
}
if (encryptedType is EncryptedKey encryptedKey)
{
var pt = null as byte[];
var keyWrapAlgorithm = encryptedKey.EncryptionMethod.KeyAlgorithm;
if (crypto.IsSupportedAlgorithm(algorithm, key))
{
var keyWrap = crypto.CreateKeyWrapProviderForUnwrap(key, encryptedKey.EncryptionMethod.KeyAlgorithm);
try
{
pt = keyWrap.UnwrapKey(encryptedKey.CipherData.CipherValue);
plainText = pt;
return(true);
}
finally
{
crypto.ReleaseKeyWrapProvider(keyWrap);
}
}
}
}
catch (Exception ex)
{
}
finally
{
if (symmetric != null)
{
crypto.ReleaseSymmetricAlgorithm(symmetric);
symmetric = null;
}
}
}
return(Out.False(out plainText));
}
