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17
go.mod
Executable file
17
go.mod
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module ssh
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go 1.18
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require (
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github.com/creack/pty v1.1.21
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github.com/gliderlabs/ssh v0.3.7
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github.com/pkg/sftp v1.13.6
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golang.org/x/crypto v0.25.0
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golang.org/x/term v0.22.0
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)
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require (
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github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
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github.com/kr/fs v0.1.0 // indirect
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golang.org/x/sys v0.22.0 // indirect
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)
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54
go.sum
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54
go.sum
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github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
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github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
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github.com/creack/pty v1.1.21 h1:1/QdRyBaHHJP61QkWMXlOIBfsgdDeeKfK8SYVUWJKf0=
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github.com/creack/pty v1.1.21/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/gliderlabs/ssh v0.3.7 h1:iV3Bqi942d9huXnzEF2Mt+CY9gLu8DNM4Obd+8bODRE=
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github.com/gliderlabs/ssh v0.3.7/go.mod h1:zpHEXBstFnQYtGnB8k8kQLol82umzn/2/snG7alWVD8=
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github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
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github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
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github.com/pkg/sftp v1.13.6 h1:JFZT4XbOU7l77xGSpOdW+pwIMqP044IyjXX6FGyEKFo=
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github.com/pkg/sftp v1.13.6/go.mod h1:tz1ryNURKu77RL+GuCzmoJYxQczL3wLNNpPWagdg4Qk=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
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github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
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github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
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golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
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golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
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golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
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golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
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golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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golang.org/x/term v0.22.0 h1:BbsgPEJULsl2fV/AT3v15Mjva5yXKQDyKf+TbDz7QJk=
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golang.org/x/term v0.22.0/go.mod h1:F3qCibpT5AMpCRfhfT53vVJwhLtIVHhB9XDjfFvnMI4=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
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golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
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golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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134
sshclient.go
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134
sshclient.go
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package main
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import (
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"fmt"
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"log"
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"net"
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"os"
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"os/signal"
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"syscall"
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"golang.org/x/crypto/ssh"
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"golang.org/x/term"
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)
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func main() {
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if len(os.Args) != 3 {
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fmt.Println("Usage: go run ssh_client.go <user> <hostname:port>")
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os.Exit(1)
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}
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user := os.Args[1]
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address := os.Args[2]
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fmt.Print("Enter Password: ")
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password, err := term.ReadPassword(int(os.Stdin.Fd()))
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if err != nil {
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log.Fatalf("Failed to read password: %v", err)
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}
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fmt.Println()
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// Establish TCP connection
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netConn, err := net.Dial("tcp", address)
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if err != nil {
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log.Fatalf("Failed to connect to %s: %v", address, err)
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}
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// Use the connection to create an SSH client
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err = runSSHClient(user, string(password), netConn)
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if err != nil {
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log.Fatalf("SSH session failed: %v", err)
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}
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}
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func runSSHClient(user, password string, netConn net.Conn) error {
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config := &ssh.ClientConfig{
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User: user,
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Auth: []ssh.AuthMethod{
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ssh.Password(password),
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},
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HostKeyCallback: ssh.InsecureIgnoreHostKey(),
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}
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// Create SSH connection from net.Conn
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conn, chans, reqs, err := ssh.NewClientConn(netConn, netConn.RemoteAddr().String(), config)
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if err != nil {
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return fmt.Errorf("failed to create SSH client connection: %v", err)
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}
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client := ssh.NewClient(conn, chans, reqs)
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defer client.Close()
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session, err := client.NewSession()
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if err != nil {
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return fmt.Errorf("failed to create session: %v", err)
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}
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defer session.Close()
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modes := ssh.TerminalModes{
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ssh.ECHO: 1,
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ssh.TTY_OP_ISPEED: 14400,
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ssh.TTY_OP_OSPEED: 14400,
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}
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fd := int(os.Stdin.Fd())
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oldState, err := term.MakeRaw(fd)
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if err != nil {
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return fmt.Errorf("failed to set raw mode: %v", err)
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}
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defer term.Restore(fd, oldState)
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width, height, err := term.GetSize(fd)
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if err != nil {
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return fmt.Errorf("failed to get terminal size: %v", err)
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}
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if err := session.RequestPty("xterm", height, width, modes); err != nil {
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return fmt.Errorf("request for pseudo terminal failed: %v", err)
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}
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session.Stdout = os.Stdout
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session.Stderr = os.Stderr
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session.Stdin = os.Stdin
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if err := session.Shell(); err != nil {
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return fmt.Errorf("failed to start shell: %v", err)
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}
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// Handle window size changes
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go handleWindowChange(session, fd)
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// Handle Ctrl+C (SIGINT)
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sigChan := make(chan os.Signal, 1)
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signal.Notify(sigChan, syscall.SIGINT)
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go func() {
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for range sigChan {
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session.Signal(ssh.SIGINT)
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}
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}()
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if err := session.Wait(); err != nil {
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if e, ok := err.(*ssh.ExitError); ok {
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os.Exit(e.ExitStatus())
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}
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return fmt.Errorf("failed to wait for session: %v", err)
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}
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return nil
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}
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func handleWindowChange(session *ssh.Session, fd int) {
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sigwinchCh := make(chan os.Signal, 1)
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signal.Notify(sigwinchCh, syscall.SIGWINCH)
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for range sigwinchCh {
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width, height, err := term.GetSize(fd)
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if err != nil {
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log.Printf("Failed to get window size: %v", err)
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continue
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}
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if err := session.WindowChange(height, width); err != nil {
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log.Printf("Failed to send window change request: %v", err)
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}
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}
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}
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83
sshserver.go
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83
sshserver.go
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package main
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import (
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"fmt"
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"io"
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"log"
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"os"
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"os/exec"
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"syscall"
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"unsafe"
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"github.com/creack/pty"
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"github.com/gliderlabs/ssh"
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"github.com/pkg/sftp"
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)
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func SftpHandler(sess ssh.Session) {
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debugStream := io.Discard
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serverOptions := []sftp.ServerOption{
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sftp.WithDebug(debugStream),
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}
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server, err := sftp.NewServer(
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sess,
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serverOptions...,
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)
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if err != nil {
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log.Printf("sftp server init error: %s\n", err)
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return
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}
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if err := server.Serve(); err == io.EOF {
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server.Close()
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fmt.Println("sftp client exited session.")
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} else if err != nil {
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fmt.Println("sftp server completed with error:", err)
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}
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}
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func passwordAuth(ctx ssh.Context, password string) bool {
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// Replace with your own logic to validate username and password
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return ctx.User() == "abc" && password == "123"
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}
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func setWinsize(f *os.File, w, h int) {
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syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ),
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uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0})))
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}
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func main() {
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ssh.Handle(func(s ssh.Session) {
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cmd := exec.Command("bash")
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ptyReq, winCh, isPty := s.Pty()
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if isPty {
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cmd.Env = append(os.Environ(), fmt.Sprintf("TERM=%s", ptyReq.Term))
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f, err := pty.Start(cmd)
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if err != nil {
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panic(err)
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}
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go func() {
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for win := range winCh {
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setWinsize(f, win.Width, win.Height)
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}
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}()
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go func() {
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io.Copy(f, s) // stdin
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}()
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io.Copy(s, f) // stdout
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cmd.Wait()
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} else {
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io.WriteString(s, "No PTY requested.\n")
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s.Exit(1)
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}
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})
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log.Println("starting ssh server on port 2222...")
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server := ssh.Server{
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Addr: ":2222",
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PasswordHandler: passwordAuth,
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SubsystemHandlers: map[string]ssh.SubsystemHandler{
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"sftp": SftpHandler,
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},
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}
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log.Fatal(server.ListenAndServe())
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}
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