func authTwitter(session *api.Session, keyRing *openpgp.KeyRing) {
username, err := readPrompt("Twitter username: "******"Couldn't read from console: %v\n", err)
}
authData, err := session.TwitterGetAuth(username)
if err != nil {
fmt.Printf("Couldn't get authentication data: %v\n", err)
}
pub := session.User.PublicKeys["primary"]
if pub == nil {
fmt.Println("No public key for this account.")
os.Exit(1)
}
fmt.Printf("Fingerprint: %s\n", pub.Fingerprint)
signer := keyRing.Entity(pub.Fingerprint)
if signer == nil {
fmt.Println("No private key for this account.")
os.Exit(1)
}
ioutil.WriteFile("/tmp/authdata.json", authData, 0644)
sig, err := keyRing.Sign(authData, pub.Fingerprint)
if err != nil {
fmt.Printf("Couldn't sign authentication data: %v\n", err)
os.Exit(1)
}
proof, err := session.ServicePostAuth(sig, username, "twitter")
if err != nil {
fmt.Printf("Couldn't authenticate via Twitter: %v\n", err)
os.Exit(1)
}
fmt.Printf("Proof text: '%s'\n", proof.Text)
}
