move coreos-cloudinit into config/cloudinit

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

config/cloudinit/system/ssh_key.go

@@ -0,0 +1,73 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package system
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os/exec"
+	"strings"
+)
+
+// Add the provide SSH public key to the core user's list of
+// authorized keys
+func AuthorizeSSHKeys(user string, keysName string, keys []string) error {
+	for i, key := range keys {
+		keys[i] = strings.TrimSpace(key)
+	}
+
+	// join all keys with newlines, ensuring the resulting string
+	// also ends with a newline
+	joined := fmt.Sprintf("%s\n", strings.Join(keys, "\n"))
+
+	cmd := exec.Command("update-ssh-keys", "-u", user, "-a", keysName)
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return err
+	}
+
+	err = cmd.Start()
+	if err != nil {
+		stdin.Close()
+		return err
+	}
+
+	_, err = io.WriteString(stdin, joined)
+	if err != nil {
+		return err
+	}
+
+	stdin.Close()
+	stdoutBytes, _ := ioutil.ReadAll(stdout)
+	stderrBytes, _ := ioutil.ReadAll(stderr)
+
+	err = cmd.Wait()
+	if err != nil {
+		return fmt.Errorf("Call to update-ssh-keys failed with %v: %s %s", err, string(stdoutBytes), string(stderrBytes))
+	}
+
+	return nil
+}