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Make internal SSH server host key path configurable (#14918)

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* Make SSH server host key path configurable

* make it possible to have multiple keys

* Make gitea.rsa the default key

* Add some more logging

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-03-08 02:43:59 +00:00 • committed by GitHub
parent 78b7529cd4
commit c03f530212
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 62 additions and 40 deletions
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34
modules/ssh/ssh.go
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@ -259,28 +259,38 @@ func Listen(host string, port int, ciphers []string, keyExchanges []string, macs
},
}
keyPath := filepath.Join(setting.AppDataPath, "ssh/gogs.rsa")
isExist, err := util.IsExist(keyPath)
if err != nil {
log.Fatal("Unable to check if %s exists. Error: %v", keyPath, err)
keys := make([]string, 0, len(setting.SSH.ServerHostKeys))
for _, key := range setting.SSH.ServerHostKeys {
isExist, err := util.IsExist(key)
if err != nil {
log.Fatal("Unable to check if %s exists. Error: %v", setting.SSH.ServerHostKeys, err)
}
if isExist {
keys = append(keys, key)
}
}
if !isExist {
filePath := filepath.Dir(keyPath)
if len(keys) == 0 {
filePath := filepath.Dir(setting.SSH.ServerHostKeys[0])
if err := os.MkdirAll(filePath, os.ModePerm); err != nil {
log.Error("Failed to create dir %s: %v", filePath, err)
}
err := GenKeyPair(keyPath)
err := GenKeyPair(setting.SSH.ServerHostKeys[0])
if err != nil {
log.Fatal("Failed to generate private key: %v", err)
}
log.Trace("New private key is generated: %s", keyPath)
log.Trace("New private key is generated: %s", setting.SSH.ServerHostKeys[0])
keys = append(keys, setting.SSH.ServerHostKeys[0])
}
err = srv.SetOption(ssh.HostKeyFile(keyPath))
if err != nil {
log.Error("Failed to set Host Key. %s", err)
for _, key := range keys {
log.Info("Adding SSH host key: %s", key)
err := srv.SetOption(ssh.HostKeyFile(key))
if err != nil {
log.Error("Failed to set Host Key. %s", err)
}
}
go listen(&srv)
@ -291,7 +301,7 @@ func Listen(host string, port int, ciphers []string, keyExchanges []string, macs
// Public key is encoded in the format for inclusion in an OpenSSH authorized_keys file.
// Private Key generated is PEM encoded
func GenKeyPair(keyPath string) error {
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
privateKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return err
}