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package main
import (
"crypto"
"encoding/base64"
"flag"
"io"
"io/ioutil"
)
func SignInput(args []string) error {
fs := flag.NewFlagSet("pkictl sign-input", flag.ExitOnError)
flagPrivate := fs.String("private-key", "", "path to the private key or read from stdin")
flagInput := fs.String("input", "stdin", "path to the message to sign or stdin")
flagOutput := fs.String("output", "stdout", "write private key to file")
fs.Parse(args)
pk, err := loadPrivateKey(*flagPrivate)
if err != nil {
return err
}
out, err := openOutput(*flagOutput)
if err != nil {
return err
}
defer out.Close()
in, err := openInput(*flagInput)
if err != nil {
return err
}
defer in.Close()
message, err := ioutil.ReadAll(in)
if err != nil {
return err
}
signature, err := pk.Sign(message, crypto.SHA256)
if err != nil {
return err
}
_, err = io.WriteString(out, base64.StdEncoding.EncodeToString(signature))
if err != nil {
return err
}
return nil
}
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