72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package main
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import (
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"crypto/ed25519"
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"crypto/rand"
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"errors"
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"log"
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"net"
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"os"
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"time"
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"golang.org/x/crypto/ssh"
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)
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var (
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errBadPassword = errors.New("permission denied")
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serverVersions = []string{
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"SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u4", // My Server Truely
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"SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u2", // cowrie default
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"SSH-2.0-OpenSSH_9.9", // Manjaro
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}
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)
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func main() {
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if len(os.Args) > 1 {
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dbPath = os.Args[1] + "/sqlite.db"
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}
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initDB()
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defer db.Close()
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serverConfig := &ssh.ServerConfig{
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MaxAuthTries: 3,
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PasswordCallback: passwordCallback,
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ServerVersion: serverVersions[0],
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}
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_, privateKey, _ := ed25519.GenerateKey(rand.Reader)
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signer, _ := ssh.NewSignerFromSigner(privateKey)
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serverConfig.AddHostKey(signer)
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listener, err := net.Listen("tcp", ":22")
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if err != nil {
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log.Fatal("Failed to listen:", err)
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return
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}
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defer listener.Close()
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for {
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conn, err := listener.Accept()
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if err != nil {
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log.Fatal("Failed to accept:", err)
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break
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}
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go handleConn(conn, serverConfig)
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}
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}
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func passwordCallback(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
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log.Println(conn.RemoteAddr(), string(conn.ClientVersion()), conn.User(), string(password))
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logLogin(conn, password)
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time.Sleep(100 * time.Millisecond)
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return nil, errBadPassword
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}
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func handleConn(conn net.Conn, serverConfig *ssh.ServerConfig) {
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defer conn.Close()
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log.Println(conn.RemoteAddr())
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logConnect(conn)
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ssh.NewServerConn(conn, serverConfig)
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}
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