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41 lines
828 B
Go
41 lines
828 B
Go
package keyscan
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import (
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"encoding/base64"
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"fmt"
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"net"
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"golang.org/x/crypto/ssh"
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"golang.org/x/crypto/ssh/knownhosts"
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)
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func ScanKeys(host string) ([]byte, error) {
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col := &collector{}
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config := &ssh.ClientConfig{
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User: "git",
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HostKeyCallback: col.StoreKey(),
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}
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client, err := ssh.Dial("tcp", host, config)
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if err == nil {
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defer client.Close()
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}
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if len(col.knownKeys) > 0 {
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return col.knownKeys, nil
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}
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return col.knownKeys, err
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}
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type collector struct {
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knownKeys []byte
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}
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func (c *collector) StoreKey() ssh.HostKeyCallback {
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return func(hostname string, remote net.Addr, key ssh.PublicKey) error {
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c.knownKeys = append(
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c.knownKeys,
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fmt.Sprintf("%s %s %s\n", knownhosts.Normalize(hostname), key.Type(), base64.StdEncoding.EncodeToString(key.Marshal()))...,
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)
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return nil
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}
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}
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