Tạo checksum

Cách tạo checksum

Cấu trúc:

string Checksum = SHA1( SHA1(ApiUser + RequestTime) + PrivateKey + RequestTime + Data);

Ví dụ:

string ApiUser = “xxxx”;
string RequestTime = “20180717081200”;
string PrivateKey = “zzzz”;
string Data = “data”;
string str1 = SHA1(ApiUser + RequestTime)  
//=16212838BAC59EE71BE26CFCD69BD3A12928F97A
string str2 = PrivateKey + RequestTime + Data  
//= zzzz20180717081200data
string Checksum = SHA1(str1 + str2)
//=972AA4E861032873766673BEC09E270D254594B7