mirror of https://github.com/caddyserver/caddy
124 lines
3.2 KiB
Go
124 lines
3.2 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package caddyauth
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import (
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"bufio"
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"bytes"
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"fmt"
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"os"
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"os/signal"
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"github.com/spf13/cobra"
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"golang.org/x/term"
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caddycmd "github.com/caddyserver/caddy/v2/cmd"
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"github.com/caddyserver/caddy/v2"
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)
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func init() {
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caddycmd.RegisterCommand(caddycmd.Command{
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Name: "hash-password",
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Usage: "[--plaintext <password>] [--algorithm <name>]",
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Short: "Hashes a password and writes base64",
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Long: `
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Convenient way to hash a plaintext password. The resulting
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hash is written to stdout as a base64 string.
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--plaintext, when omitted, will be read from stdin. If
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Caddy is attached to a controlling tty, the plaintext will
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not be echoed.
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--algorithm currently only supports 'bcrypt', and is the default.
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`,
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CobraFunc: func(cmd *cobra.Command) {
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cmd.Flags().StringP("plaintext", "p", "", "The plaintext password")
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cmd.Flags().StringP("algorithm", "a", "bcrypt", "Name of the hash algorithm")
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cmd.RunE = caddycmd.WrapCommandFuncForCobra(cmdHashPassword)
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},
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})
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}
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func cmdHashPassword(fs caddycmd.Flags) (int, error) {
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var err error
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algorithm := fs.String("algorithm")
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plaintext := []byte(fs.String("plaintext"))
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if len(plaintext) == 0 {
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fd := int(os.Stdin.Fd())
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if term.IsTerminal(fd) {
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// ensure the terminal state is restored on SIGINT
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state, _ := term.GetState(fd)
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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go func() {
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<-c
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_ = term.Restore(fd, state)
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os.Exit(caddy.ExitCodeFailedStartup)
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}()
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defer signal.Stop(c)
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fmt.Fprint(os.Stderr, "Enter password: ")
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plaintext, err = term.ReadPassword(fd)
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fmt.Fprintln(os.Stderr)
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if err != nil {
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return caddy.ExitCodeFailedStartup, err
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}
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fmt.Fprint(os.Stderr, "Confirm password: ")
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confirmation, err := term.ReadPassword(fd)
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fmt.Fprintln(os.Stderr)
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if err != nil {
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return caddy.ExitCodeFailedStartup, err
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}
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if !bytes.Equal(plaintext, confirmation) {
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return caddy.ExitCodeFailedStartup, fmt.Errorf("password does not match")
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}
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} else {
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rd := bufio.NewReader(os.Stdin)
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plaintext, err = rd.ReadBytes('\n')
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if err != nil {
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return caddy.ExitCodeFailedStartup, err
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}
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plaintext = plaintext[:len(plaintext)-1] // Trailing newline
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}
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if len(plaintext) == 0 {
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return caddy.ExitCodeFailedStartup, fmt.Errorf("plaintext is required")
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}
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}
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var hash []byte
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var hashString string
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switch algorithm {
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case "bcrypt":
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hash, err = BcryptHash{}.Hash(plaintext)
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hashString = string(hash)
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default:
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return caddy.ExitCodeFailedStartup, fmt.Errorf("unrecognized hash algorithm: %s", algorithm)
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}
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if err != nil {
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return caddy.ExitCodeFailedStartup, err
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}
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fmt.Println(hashString)
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return 0, nil
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}
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