/// <summary>
/// 解密字符串
/// </summary>
/// <param name="encodeInfo">最终加密后的数据（含加密串和IV串的混合串）</param>
/// <returns>解密后的数据</returns>
public static string GetDeCodeInfo(string decodeInfo)
{
CryptLib _crypt = new CryptLib();
//aesKey密钥
string aesKey = System.Configuration.ConfigurationManager.AppSettings["aesKey"].ToString();
if (!string.IsNullOrWhiteSpace(aesKey))
{
//得到hash后的aseKey
aesKey = CryptLib.getHashSha256(aesKey, 31); //32 bytes = 256 bits
}
//返回解密后的原串值
return(_crypt.decrypt(decodeInfo, aesKey, 16));
}
/// <summary>
/// 加密字符串（aesKey）
/// </summary>
/// <param name="encodeInfo">要加密的字符串</param>
/// <returns>加密后的字符串（含IV向量）</returns>
public static string GetEnCodeInfo(string encodeInfo)
{
CryptLib _crypt = new CryptLib();
string result = "";
//aesKey密钥
string aesKey = System.Configuration.ConfigurationManager.AppSettings["aesKey"].ToString();
//拿到hash后的aseKey
aesKey = CryptLib.getHashSha256(aesKey, 31); //32 bytes = 256 bits
//获取一个16位的随机向量
string iv = CryptLib.GenerateRandomIV(16);
//加密字符串（AppID,hashaesKey,iv）
result = _crypt.encrypt(encodeInfo, aesKey, iv);
//将加密后的字符串与加密前的IV向量穿插混合后得到最后的串
return(_crypt.appendIVString(result, iv)); //将加密字符串和iv混合处理后再发送
}