static public bool ValidateSign(Dictionary <string, string> recData, Encoding encoding, ref string errorMessage)
{
Dictionary <string, string> reqData = new Dictionary <string, string>(recData);
if (!reqData.ContainsKey("signMethod") || !reqData.ContainsKey("signature") || !reqData.ContainsKey("version"))
{
errorMessage += "signMethod或signature或version为空，无法验证签名。" + "\r\n";
return(false);
}
string signMethod = reqData["signMethod"];
string version = reqData["version"];
bool result = false;
if ("01".Equals(signMethod))
{
if ("5.0.0".Equals(version))
{
string signValue = reqData["signature"];
byte[] signByte = Convert.FromBase64String(signValue);
reqData.Remove("signature");
string stringData = SDKUtil.CreateLinkString(reqData, true, false, encoding);
byte[] signDigest = SecurityUtil.Sha1(stringData, encoding);
string stringSignDigest = SDKUtil.ByteArray2HexString(signDigest);
AsymmetricKeyParameter key = CertUtil.GetValidateKeyFromPath(reqData["certId"]);
if (null == key)
{
errorMessage = "未找到证书，无法验签，验签失败。";
return(false);
}
result = SecurityUtil.ValidateSha1WithRsa(key, signByte, encoding.GetBytes(stringSignDigest));
}
else
{
string signValue = reqData["signature"];
byte[] signByte = Convert.FromBase64String(signValue);
reqData.Remove("signature");
string stringData = SDKUtil.CreateLinkString(reqData, true, false, encoding);
byte[] signDigest = SecurityUtil.Sha256(stringData, encoding);
string stringSignDigest = SDKUtil.ByteArray2HexString(signDigest);
//string signPubKeyCert = reqData["signPubKeyCert"];
//X509Certificate x509Cert = CertUtil.VerifyAndGetPubKey(signPubKeyCert);
string filepath = Application.StartupPath + "\\Certificate\\" + "商户898310173990680证书.pfx";
X509Certificate x509Cert = CertUtil.ReadCertFromFile(filepath, "690085");
if (x509Cert == null)
{
errorMessage += "获取验签证书失败，无法验签，验签失败。" + "\r\n";
return(false);
}
result = SecurityUtil.ValidateSha256WithRsa(x509Cert.GetPublicKey(), signByte, encoding.GetBytes(stringSignDigest));
}
}
else if ("11".Equals(signMethod) || "12".Equals(signMethod))
{
errorMessage += "不支持此种算法" + "\r\n";
return(false);
}
else
{
errorMessage += "Error signMethod [" + signMethod + "] in Validate. " + "\r\n";
return(false);
}
if (!result)
{
errorMessage += "验签失败" + "\r\n";
}
return(result);
}