Generated codes do not match Google Authenticator results
See original GitHub issueI am using this code:
string secret = "KREQPD7NXSGO3T3B";
while (true)
{
byte[] secretBytes = new Base32Encoder().Decode(secret);
OtpNet.Totp totp = new OtpNet.Totp(secretBytes);
string twoFactorCode = totp.ComputeTotp();
Console.WriteLine("Two factor code: " + twoFactorCode);
System.Threading.Thread.Sleep(2000);
}
Now if you take that same string (for secret
) and put it in to Google Authenticator manually, you will notice that this code generates different keys. On the otherhand, if I use a different value for secret (eg “uhj34qsyuwftzji4qq6k3c3wnstdb57m”) then both the values generated by OtpNet and Google Authenticator will match.
What am I doing wrong?
Issue Analytics
- State:
- Created 5 years ago
- Comments:7 (1 by maintainers)
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Top GitHub Comments
I just got it. The way to get bytes[] is wrong. I need to use
var secretKey = Base32Encoding.ToBytes(OtpSecretKey);
Then OtpNet and Google Authenticator will match.@derekantrican Great