// 根据secretKey，signatureMethod和parameters生成签名
public static String genSignature(String secretKey, String signatureMethod, Dictionary <String, String> parameters)
{
if (signatureMethod.ToUpper().Equals("SM3"))
{
// 国密SM3加密
parameters = parameters.OrderBy(o => o.Key, StringComparer.Ordinal).ToDictionary(o => o.Key, p => p.Value);
StringBuilder builder = new StringBuilder();
foreach (KeyValuePair <String, String> kv in parameters)
{
builder.Append(kv.Key).Append(kv.Value);
}
builder.Append(secretKey);
byte[] tmp = Encoding.Default.GetBytes(builder.ToString());
byte[] md = new byte[32];
SM3Digest sm3 = new SM3Digest();
sm3.BlockUpdate(tmp, 0, tmp.Length);
sm3.DoFinal(md, 0);
return(new UTF8Encoding().GetString(Hex.Encode(md)));
}
else
{
return(genSignature(secretKey, parameters));
}
}