63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
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// This is a fake login implementation. It uses whatever default
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// PAM service configuration is available on the system, and tries
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// to authenticate any user. This should cause PAM to ask its
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// conversation handler for a username and password, in sequence.
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//
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// This application will handle those requests by displaying the
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// PAM-provided prompt and sending back the first line of stdin input
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// it can read for each.
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//
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// Keep in mind that unless run as root (or setuid root), the only
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// user's authentication that can succeed is that of the process owner.
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//
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// It's not a real login for several reasons:
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//
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// It doesn't switch users.
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// It's not a real login.
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//
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// It does however demonstrate a simple but powerful use of PAM.
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package main
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import (
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"bufio"
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"code.google.com/p/gopass"
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"errors"
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"fmt"
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"github.com/msteinert/pam"
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"log"
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"os"
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)
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func main() {
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t, err := pam.StartFunc("", "", func(s pam.Style, msg string) (string, error) {
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switch s {
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case pam.PromptEchoOff:
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return gopass.GetPass(msg)
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case pam.PromptEchoOn:
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fmt.Print(msg)
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bio := bufio.NewReader(os.Stdin)
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input, err := bio.ReadString('\n')
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if err != nil {
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return "", err
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}
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return input[:len(input)-1], nil
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case pam.ErrorMsg:
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log.Print(msg)
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return "", nil
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case pam.TextInfo:
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fmt.Println(msg)
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return "", nil
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}
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return "", errors.New("Unrecognized message style")
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})
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if err != nil {
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log.Fatalf("Start: %s", err.Error())
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}
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err = t.Authenticate(0)
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if err != nil {
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log.Fatalf("Authenticate: %s", err.Error())
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}
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log.Print("Authentication succeeded!")
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}
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