50 lines
1001 B
Go
50 lines
1001 B
Go
package proxy
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import (
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"net"
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"golang.org/x/crypto/ssh"
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)
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type HostKey struct{}
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func NewHostKey() HostKey {
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return HostKey{}
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}
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func (h HostKey) Get(username, privateKey, serverURL string) (ssh.PublicKey, error) {
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publicKeyChannel := make(chan ssh.PublicKey, 1)
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dialErrorChannel := make(chan error)
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if username == "" {
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username = "jumpbox"
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}
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signer, err := ssh.ParsePrivateKey([]byte(privateKey))
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if err != nil {
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return nil, err
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}
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clientConfig := NewSSHClientConfig(username, keyScanCallback(publicKeyChannel), ssh.PublicKeys(signer))
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go func() {
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conn, err := ssh.Dial("tcp", serverURL, clientConfig)
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if err != nil {
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publicKeyChannel <- nil
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dialErrorChannel <- err
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return
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}
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defer conn.Close()
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dialErrorChannel <- nil
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}()
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return <-publicKeyChannel, <-dialErrorChannel
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}
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func keyScanCallback(publicKeyChannel chan ssh.PublicKey) ssh.HostKeyCallback {
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return func(_ string, _ net.Addr, key ssh.PublicKey) error {
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publicKeyChannel <- key
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return nil
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}
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}
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