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46 lines
717 B
46 lines
717 B
package main
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import (
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"github.com/fernet/fernet-go"
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)
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const Usage = `Usage: fernet-sign ENV
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fernet-sign encrypts and signs its input and prints the resulting token.
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It uses the key in environment variable ENV.`
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func main() {
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log.SetFlags(0)
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log.SetPrefix("fernet: ")
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if len(os.Args) != 2 {
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fmt.Fprintln(os.Stderr, Usage)
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os.Exit(2)
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}
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key, err := fernet.DecodeKey(os.Getenv(os.Args[1]))
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if err != nil {
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log.Fatalln(err)
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}
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b, err := ioutil.ReadAll(os.Stdin)
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if err != nil {
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log.Fatalln(err)
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}
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t, err := fernet.EncryptAndSign(b, key)
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if err != nil {
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log.Fatalln(err)
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}
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_, err = os.Stdout.Write(append(t, '\n'))
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if err != nil {
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log.Fatalln(err)
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}
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}
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