コード例 #1
0
        private bool ProcessEncryptedDataItem(XmlElement encryptedDataElement)
        {
            if (ExceptUris.Count > 0)
            {
                for (int index = 0; index < ExceptUris.Count; index++)
                {
                    if (IsTargetElement(encryptedDataElement, (string)ExceptUris[index]))
                    {
                        return(false);
                    }
                }
            }
            EncryptedData ed = new EncryptedData();

            ed.LoadXml(encryptedDataElement);
            ICipherParameters symAlg = XmlDecryption.GetDecryptionKey(ed, NS.None);

            if (symAlg == null)
            {
                throw new System.Security.Cryptography.CryptographicException(SR.Cryptography_Xml_MissingDecryptionKey);
            }
            byte[] decrypted = XmlDecryption.DecryptData(ed, symAlg);

            ReplaceEncryptedData(encryptedDataElement, decrypted);
            return(true);
        }
コード例 #2
0
        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());
        }
コード例 #3
0
        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());
        }
コード例 #4
0
        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());
        }
コード例 #5
0
        public void GetDecryptionKey_StringNull()
        {
            XmlDecryption ex = new XmlDecryption();

            Assert.Null(ex.GetDecryptionKey(new EncryptedData(), NS.None));
        }
コード例 #6
0
        public void GetDecryptionKey_NoEncryptionMethod()
        {
            EncryptedData edata = new EncryptedData();

            edata.KeyInfo = new KeyInfo();
            edata.KeyInfo.AddClause(new KeyInfoEncryptedKey(new EncryptedKey()));
            XmlDecryption exml = new XmlDecryption();

            Assert.Throws <System.Security.Cryptography.CryptographicException>(() => exml.GetDecryptionKey(edata, NS.None));
        }
コード例 #7
0
        public void GetDecryptionKey_EncryptedDataNull()
        {
            XmlDecryption ex = new XmlDecryption();

            Assert.Throws <ArgumentNullException>(() => ex.GetDecryptionKey(null, NS.XmlEncAES128Url));
        }