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some minor changes in README.md

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Dennis Paul 2022-08-28 19:25:32 +02:00
parent 759f640132
commit 646d49aeb1
1 changed files with 21 additions and 1 deletions
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README.md
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@ -98,6 +98,26 @@ import github.com/sec51/twofactor
5- All following authentications should display only a input field with no QR code. 5- All following authentications should display only a input field with no QR code.
#### Case 2: Calculate OTP from secret
If you used the totp.Secret() function, you got a string, so first we have to convert it back into an []byte
object and after start to initialize the object.
```go
secretBytes, err := base32.StdEncoding.DecodeString(reqSecret.TwofactorSecret)
if err != nil {
panic(fmt.Errorf("couldn't convert base32 secret to string: %w", err))
}
totp, err := twofactor.NewTOTPWithKey(secretBytes, "YOUR_USER_ACCOUNT", "YOUR_ISSUER", crypto.SHA256, 6)
if err != nil {
panic(fmt.Errorf("couldn't create TOTP object: %w", err))
}
otp := twofactor.CalculateTOTP(totp, 0)
fmt.Printf("OTP: %v\n", otp)
```
### References ### References
@ -108,7 +128,7 @@ import github.com/sec51/twofactor
### Author ### Author
`totp` was written by Sec51 <info@sec51.com>. Initialliy `totp` was written by Sec51 <info@sec51.com> and the further development was made by dnnspaul <dennis@blaumedia.com>.
### License ### License