75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package ssh
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import (
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"io/ioutil"
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"strings"
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"github.com/go-gost/gost/pkg/auth"
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tls_util "github.com/go-gost/gost/pkg/common/util/tls"
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ssh_util "github.com/go-gost/gost/pkg/internal/util/ssh"
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mdata "github.com/go-gost/gost/pkg/metadata"
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"golang.org/x/crypto/ssh"
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)
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type metadata struct {
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authenticator auth.Authenticator
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signer ssh.Signer
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authorizedKeys map[string]bool
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}
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func (h *forwardHandler) parseMetadata(md mdata.Metadata) (err error) {
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const (
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users = "users"
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authorizedKeys = "authorizedKeys"
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privateKeyFile = "privateKeyFile"
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passphrase = "passphrase"
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)
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if auths := mdata.GetStrings(md, users); len(auths) > 0 {
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authenticator := auth.NewLocalAuthenticator(nil)
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for _, auth := range auths {
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ss := strings.SplitN(auth, ":", 2)
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if len(ss) == 1 {
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authenticator.Add(ss[0], "")
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} else {
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authenticator.Add(ss[0], ss[1])
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}
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}
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h.md.authenticator = authenticator
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}
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if key := mdata.GetString(md, privateKeyFile); key != "" {
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data, err := ioutil.ReadFile(key)
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if err != nil {
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return err
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}
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pp := mdata.GetString(md, passphrase)
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if pp == "" {
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h.md.signer, err = ssh.ParsePrivateKey(data)
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} else {
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h.md.signer, err = ssh.ParsePrivateKeyWithPassphrase(data, []byte(pp))
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}
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if err != nil {
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return err
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}
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}
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if h.md.signer == nil {
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signer, err := ssh.NewSignerFromKey(tls_util.DefaultConfig.Clone().Certificates[0].PrivateKey)
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if err != nil {
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return err
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}
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h.md.signer = signer
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}
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if name := mdata.GetString(md, authorizedKeys); name != "" {
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m, err := ssh_util.ParseAuthorizedKeysFile(name)
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if err != nil {
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return err
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}
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h.md.authorizedKeys = m
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}
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return
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}
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