/
known_hosts.go
61 lines (54 loc) · 1.47 KB
/
known_hosts.go
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/*-
* Copyright 2016 Square 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 api
import (
"bytes"
"net/http"
"golang.org/x/crypto/ssh"
)
func (c *Api) KnownHosts(w http.ResponseWriter, r *http.Request) {
if !clientAuthenticated(r) {
http.Error(w, "no client certificate provided", http.StatusUnauthorized)
return
}
hosts, err := c.GetKnownHosts()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
_, _ = w.Write([]byte(hosts))
}
func (c *Api) GetKnownHosts() (string, error) {
var buffer bytes.Buffer
for _, entry := range c.conf.ExtraKnownHosts {
buffer.WriteString(entry)
buffer.WriteRune('\n')
}
rows, err := c.storage.QueryHostkeys()
if err != nil {
return "", err
}
for rows.Next() {
hostname, pubkey, err := rows.Get()
if err != nil {
return "", err
}
buffer.WriteString(hostname)
buffer.WriteRune(' ')
buffer.Write(ssh.MarshalAuthorizedKey(pubkey))
}
return buffer.String(), nil
}