109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
// Copyright 2015 CoreOS, Inc.
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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 system
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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)
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func diffLines(src, dst []string) []string {
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var tgt []string
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mb := map[string]bool{}
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for _, x := range src {
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mb[x] = true
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}
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for _, x := range dst {
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if _, ok := mb[x]; !ok {
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mb[x] = true
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}
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}
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for k, _ := range mb {
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tgt = append(tgt, k)
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}
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return tgt
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}
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func readLines(path string) ([]string, error) {
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var lines []string
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file, err := os.Open(path)
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if err != nil {
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return lines, err
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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lines = append(lines, scanner.Text())
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}
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return lines, scanner.Err()
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}
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// writeLines writes the lines to the given file.
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func writeLines(lines []string, path string) error {
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file, err := os.Create(path)
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if err != nil {
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return err
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}
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defer file.Close()
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w := bufio.NewWriter(file)
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for _, line := range lines {
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fmt.Fprintln(w, line)
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}
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return w.Flush()
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}
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// Add the provide SSH public key to the core user's list of
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// authorized keys
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func AuthorizeSSHKeys(user string, keysName string, keys []string) error {
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for name, key := range keys {
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keys[name] = strings.TrimSpace(key)
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}
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// join all keys with newlines, ensuring the resulting string
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// also ends with a newline
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// joined := fmt.Sprintf("%s\n", strings.Join(keys, "\n"))
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home, err := UserHome(user)
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if err != nil {
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return err
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}
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if _, err = os.Stat(home + "/.ssh"); err != nil {
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if err = os.MkdirAll(home+"/.ssh", os.FileMode(0755)); err != nil {
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return err
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}
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}
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authorized_file := fmt.Sprintf("%s/.ssh/authorized_keys", home)
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var newkeys []string
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for _, x := range keys {
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newkeys = append(newkeys, strings.Split(x, "\n")...)
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}
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oldkeys, _ := readLines(authorized_file)
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diffkeys := diffLines(oldkeys, newkeys)
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return writeLines(diffkeys, authorized_file)
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}
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