//根据属性列表计算签名
private string CalculateSign(SortedList <string, string> properties, WechatPaySignType signType)
{
StringBuilder stringA = new StringBuilder();
bool isFirst = true;
foreach (KeyValuePair <string, string> item in properties)
{
if (item.Key == "sign")
{
continue;
}
if (isFirst == false)
{
stringA.Append("&");
}
else
{
isFirst = false;
}
stringA.Append(item.Key);
stringA.Append("=");
stringA.Append(item.Value);
}
stringA.Append("&key=");
stringA.Append(this._settings.SecurityKey);
byte[] hash = null;
if (signType == WechatPaySignType.MD5)
{
MD5 md5 = MD5.Create();
md5.Initialize();
hash = md5.ComputeHash(Encoding.UTF8.GetBytes(stringA.ToString()));
}
else
{
Console.WriteLine(stringA.ToString());
KeyedHashAlgorithm hashAlgo = new HMACSHA256(
Encoding.UTF8.GetBytes(this._settings.SecurityKey)
);
hashAlgo.Initialize();
hash = hashAlgo.ComputeHash(Encoding.UTF8.GetBytes(stringA.ToString()));
}
if (hash == null)
{
throw new InvalidOperationException(nameof(hash));
}
StringBuilder signBuilder = new StringBuilder();
for (int i = 0; i < 32; i++)
{
signBuilder.Append(hash[i].ToString("X2"));
}
return(signBuilder.ToString());
}
public static string SignTypeTransfer(WechatPaySignType signType)
{
switch (signType)
{
case WechatPaySignType.MD5: return("MD5");
case WechatPaySignType.HMACSHA256: return("HMAC-SHA256");
default: throw new ArgumentNullException(nameof(signType));
}
}
