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53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
package service
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import (
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"fmt"
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"os"
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"github.com/pkg/errors"
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"github.com/pquerna/otp"
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"github.com/pquerna/otp/totp"
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"github.com/spf13/viper"
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)
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func NewDefaultTotpKey() (*otp.Key, error) {
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if keyURL := viper.GetString("totp-key-url"); len(keyURL) > 0 {
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return otp.NewKeyFromURL(keyURL)
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}
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// The issuer parameter is a string value indicating the provider or service this account is associated with, URL-encoded according to RFC 3986.
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// If the issuer parameter is absent, issuer information may be taken from the issuer prefix of the label.
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// If both issuer parameter and issuer label prefix are present, they should be equal.
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// Valid values corresponding to the label prefix examples above would be: issuer=Example, issuer=Provider1, and issuer=Big%20Corporation.
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totpIssuer := viper.GetString("totp-issuer")
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totpAccountName := viper.GetString("totp-account-name")
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if len(totpIssuer) == 0 {
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hostname, err := os.Hostname()
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if err != nil {
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return nil, errors.Wrapf(err, "can not get hostname from os for totp issuer")
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}
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totpIssuer = hostname
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}
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if len(totpAccountName) == 0 {
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//unix like os
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user, ok := os.LookupEnv("USER")
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if !ok {
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user, ok = os.LookupEnv("USERNAME")
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}
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if !ok {
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return nil, fmt.Errorf("can not get USER or USERNAME env var for totp account name")
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}
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totpAccountName = user
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}
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return totp.Generate(totp.GenerateOpts{
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Issuer: totpIssuer,
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AccountName: totpAccountName,
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})
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}
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