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Add compatiblity comment about SHA1 #57

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Nov 11, 2020
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3 changes: 3 additions & 0 deletions otp.go
Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,9 @@ func (k *Key) URL() string {
type Algorithm int

const (
// AlgorithmSHA1 should be used for compatibility with Google Authenticator.
//
// See https://github.com/pquerna/otp/issues/55 for additional details.
AlgorithmSHA1 Algorithm = iota
AlgorithmSHA256
AlgorithmSHA512
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