/// <summary>
/// 验证数字签名
/// </summary>
/// <param name="jsonSignature">用于创建数字签名的json对象字符串,JObject对象</param>
/// <param name="signatureText">已经获得的数字签名</param>
/// <returns></returns>
public static bool VerifySignature(JObject jsonSignature, string signatureText)
{
int companyId = jsonSignature["CompanySerialNum"].Value <int>(),
userId = jsonSignature["UserID"].Value <int>();
var signatureFilePath = BuildConfigFilePath.BuildSignatureConfigFilePath(companyId, userId);
var config = ConfigHelper.GetConfig <SignatureKeyConfig>(signatureFilePath);
if (config == null || config.ExpTime < DateTime.Now)
{
return(false);
}
byte[] signature = Convert.FromBase64String(signatureText);
rsaCryptoServiceProvider.FromXmlString(config.SignaturePrivateKey);
rsaCryptoServiceProvider.ImportCspBlob(rsaCryptoServiceProvider.ExportCspBlob(false));
var rsaSignatureDeformatter = new RSAPKCS1SignatureDeformatter(rsaCryptoServiceProvider);
rsaSignatureDeformatter.SetHashAlgorithm("SHA1");
var sha1 = new SHA1CryptoServiceProvider();
string jsonSignatureString = jsonSignature.ToString();
var sha1HashResultBytes = sha1.ComputeHash(jsonSignatureString.ToUTF8Bytes());
return(rsaSignatureDeformatter.VerifySignature(sha1HashResultBytes, signature));
}
/// <summary>
/// 创建数字签名
/// </summary>
/// <param name="jsonSignature">用于创建数字签名的json对象字符串,JObject对象</param>
/// <returns></returns>
public static string BuildSignature(JObject jsonSignature)
{
var rsaSignatureFormatter = new RSAPKCS1SignatureFormatter(rsaCryptoServiceProvider);
rsaSignatureFormatter.SetHashAlgorithm("SHA1");
var sha1 = new SHA1CryptoServiceProvider();
var jsonSignatureString = jsonSignature.ToString();
var sha1HashResultBytes = sha1.ComputeHash(jsonSignatureString.ToUTF8Bytes());
byte[] signData = rsaSignatureFormatter.CreateSignature(sha1HashResultBytes);
var obj = new SignatureKeyConfig
{
ExpTime = DateTime.Now.AddDays(1).ToShortDateString().ToDateTime().AddSeconds(-1),
SignaturePrivateKey = rsaCryptoServiceProvider.ToXmlString(true)
};
int companyId = jsonSignature["CompanySerialNum"].Value <int>(),
userId = jsonSignature["UserID"].Value <int>();
var signatureFilePath = BuildConfigFilePath.BuildSignatureConfigFilePath(companyId, userId);
ConfigHelper.Save(JObject.FromObject(obj).ToString(), signatureFilePath);
return(Convert.ToBase64String(signData));
}