Esempio n. 1
0
        /// <summary>
        /// 解密接收到的加密数据并验证完整性,如果验证通过返回明文
        /// </summary>
        /// <param name="data">接收到的加密数据</param>
        /// <returns>解密并验证成功后,返回明文</returns>
        public string DecryptAndVerifyData(string data)
        {
            data.CheckNotNullOrEmpty("data");

            string[] separators = { Separator };
            //0为DES密钥密文,1为 正文+摘要 的密文
            string[] datas = data.Split(separators, StringSplitOptions.None);
            //用接收端私钥RSA解密获取DES密钥
            byte[] desKey = RsaHelper.Decrypt(Convert.FromBase64String(datas[0]), _ownPrivateKey);
            //DES解密获取 正文+摘要 的明文
            data = new DesHelper(desKey).Decrypt(datas[1]);
            //0为正文明文,1为摘要
            datas = data.Split(separators, StringSplitOptions.None);
            data = datas[0];
            if (RsaHelper.VerifyData(data, datas[1], _hashType, _facePublicKey))
            {
                return data;
            }
            throw new CryptographicException("加密数据在进行解密时校验失败");
        }
Esempio n. 2
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        /// <summary>
        /// 加密要发送的数据,包含签名,DES加密,RSA加密DES密钥等步骤
        /// </summary>
        /// <param name="data">要加密的正文明文数据</param>
        /// <returns>已加密待发送的密文</returns>
        public string EncryptData(string data)
        {
            data.CheckNotNull("data");

            //获取正文摘要
            string signData = RsaHelper.SignData(data, _hashType, _ownPrivateKey);
            data = new[] { data, signData }.ExpandAndToString(Separator);
            //使用DES加密 正文+摘要
            DesHelper des = new DesHelper();
            data = des.Encrypt(data);
            //RSA加密DES密钥
            string enDesKey = Convert.ToBase64String(RsaHelper.Encrypt(des.Key, _facePublicKey));
            return new[] { enDesKey, data }.ExpandAndToString(Separator);
        }
Esempio n. 3
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 /// <summary>
 /// 解密字符串,输入BASE64编码字符串
 /// </summary>
 /// <param name="source">要解密的BASE64编码字符串</param>
 /// <param name="key">密钥字符串,长度为8或者24</param>
 /// <returns>解密的明文字符串</returns>
 public static string Decrypt(string source, string key)
 {
     source.CheckNotNullOrEmpty("source");
     key.CheckNotNullOrEmpty("key");
     byte[] keyBytes = Encoding.UTF8.GetBytes(key);
     DesHelper des = new DesHelper(keyBytes);
     return des.Decrypt(source);
 }
Esempio n. 4
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 /// <summary>
 /// 解密字节数组
 /// </summary>
 /// <param name="source">要解密的字节数组</param>
 /// <param name="key">密钥字节数组,长度为8或者24</param>
 /// <returns>解密后的字节数组</returns>
 public static byte[] Decrypt(byte[] source, byte[] key)
 {
     DesHelper des = new DesHelper(key);
     return des.Decrypt(source);
 }
Esempio n. 5
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        /// <summary>
        /// 分段加密文件
        /// </summary>
        /// <param name="sourceFile">待加密的文件名</param>
        /// <param name="targetFile">保存加密文件名</param>
        /// <param name="sectionLength">分段大小(字节)</param>
        /// <param name="key">密钥字符串,长度为8或者24</param>
        public static void EncryptFile(string sourceFile, string targetFile, int sectionLength, string key)
        {
            sourceFile.CheckFileExists("sourceFile");
            targetFile.CheckNotNullOrEmpty("targetFile");
            key.CheckNotNullOrEmpty("key");
            sectionLength.CheckGreaterThan("sectionLength", 0);

            byte[] keyBytes = Encoding.UTF8.GetBytes(key);
            DesHelper des = new DesHelper(keyBytes);
            des.EncryptFile(sourceFile, targetFile, sectionLength);
        }
Esempio n. 6
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        /// <summary>
        /// 整体加密文件
        /// </summary>
        /// <param name="sourceFile">待加密的文件名</param>
        /// <param name="targetFile">保存加密文件名</param>
        /// <param name="key">密钥字符串,长度为8或者24</param>
        public static void EncryptFile(string sourceFile, string targetFile, string key)
        {
            sourceFile.CheckFileExists("sourceFile");
            targetFile.CheckNotNullOrEmpty("targetFile");
            key.CheckNotNullOrEmpty("key");

            byte[] keyBytes = Encoding.UTF8.GetBytes(key);
            DesHelper des = new DesHelper(keyBytes);
            des.EncryptFile(sourceFile, targetFile);
        }