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Diffstat (limited to 'cmd/podman/system/connection')
-rw-r--r--cmd/podman/system/connection/add.go126
-rw-r--r--cmd/podman/system/connection/shared.go28
2 files changed, 97 insertions, 57 deletions
diff --git a/cmd/podman/system/connection/add.go b/cmd/podman/system/connection/add.go
index 912193d0b..290b3c245 100644
--- a/cmd/podman/system/connection/add.go
+++ b/cmd/podman/system/connection/add.go
@@ -1,7 +1,6 @@
package connection
import (
- "bytes"
"encoding/json"
"fmt"
"net"
@@ -9,6 +8,7 @@ import (
"os"
"os/user"
"regexp"
+ "time"
"github.com/containers/common/pkg/completion"
"github.com/containers/common/pkg/config"
@@ -83,7 +83,6 @@ func add(cmd *cobra.Command, args []string) error {
} else if !match {
dest = "ssh://" + dest
}
-
uri, err := url.Parse(dest)
if err != nil {
return err
@@ -96,7 +95,7 @@ func add(cmd *cobra.Command, args []string) error {
switch uri.Scheme {
case "ssh":
if uri.User.Username() == "" {
- if uri.User, err = getUserInfo(uri); err != nil {
+ if uri.User, err = GetUserInfo(uri); err != nil {
return err
}
}
@@ -108,9 +107,12 @@ func add(cmd *cobra.Command, args []string) error {
if uri.Port() == "" {
uri.Host = net.JoinHostPort(uri.Hostname(), cmd.Flag("port").DefValue)
}
-
+ iden := ""
+ if cmd.Flags().Changed("identity") {
+ iden = cOpts.Identity
+ }
if uri.Path == "" || uri.Path == "/" {
- if uri.Path, err = getUDS(cmd, uri); err != nil {
+ if uri.Path, err = getUDS(cmd, uri, iden); err != nil {
return err
}
}
@@ -178,7 +180,7 @@ func add(cmd *cobra.Command, args []string) error {
return cfg.Write()
}
-func getUserInfo(uri *url.URL) (*url.Userinfo, error) {
+func GetUserInfo(uri *url.URL) (*url.Userinfo, error) {
var (
usr *user.User
err error
@@ -202,30 +204,74 @@ func getUserInfo(uri *url.URL) (*url.Userinfo, error) {
return url.User(usr.Username), nil
}
-func getUDS(cmd *cobra.Command, uri *url.URL) (string, error) {
- var signers []ssh.Signer
+func getUDS(cmd *cobra.Command, uri *url.URL, iden string) (string, error) {
+ cfg, err := ValidateAndConfigure(uri, iden)
+ if err != nil {
+ return "", errors.Wrapf(err, "failed to validate")
+ }
+ dial, err := ssh.Dial("tcp", uri.Host, cfg)
+ if err != nil {
+ return "", errors.Wrapf(err, "failed to connect")
+ }
+ defer dial.Close()
+
+ session, err := dial.NewSession()
+ if err != nil {
+ return "", errors.Wrapf(err, "failed to create new ssh session on %q", uri.Host)
+ }
+ defer session.Close()
+
+ // Override podman binary for testing etc
+ podman := "podman"
+ if v, found := os.LookupEnv("PODMAN_BINARY"); found {
+ podman = v
+ }
+ run := podman + " info --format=json"
+ out, err := ExecRemoteCommand(dial, run)
+ if err != nil {
+ return "", err
+ }
+ infoJSON, err := json.Marshal(out)
+ if err != nil {
+ return "", err
+ }
+
+ var info define.Info
+ if err := json.Unmarshal(infoJSON, &info); err != nil {
+ return "", errors.Wrapf(err, "failed to parse 'podman info' results")
+ }
+
+ if info.Host.RemoteSocket == nil || len(info.Host.RemoteSocket.Path) == 0 {
+ return "", errors.Errorf("remote podman %q failed to report its UDS socket", uri.Host)
+ }
+ return info.Host.RemoteSocket.Path, nil
+}
+// ValidateAndConfigure will take a ssh url and an identity key (rsa and the like) and ensure the information given is valid
+// iden iden can be blank to mean no identity key
+// once the function validates the information it creates and returns an ssh.ClientConfig
+func ValidateAndConfigure(uri *url.URL, iden string) (*ssh.ClientConfig, error) {
+ var signers []ssh.Signer
passwd, passwdSet := uri.User.Password()
- if cmd.Flags().Changed("identity") {
- value := cmd.Flag("identity").Value.String()
+ if iden != "" { // iden might be blank if coming from image scp or if no validation is needed
+ value := iden
s, err := terminal.PublicKey(value, []byte(passwd))
if err != nil {
- return "", errors.Wrapf(err, "failed to read identity %q", value)
+ return nil, errors.Wrapf(err, "failed to read identity %q", value)
}
signers = append(signers, s)
logrus.Debugf("SSH Ident Key %q %s %s", value, ssh.FingerprintSHA256(s.PublicKey()), s.PublicKey().Type())
}
-
- if sock, found := os.LookupEnv("SSH_AUTH_SOCK"); found {
+ if sock, found := os.LookupEnv("SSH_AUTH_SOCK"); found { // validate ssh information, specifically the unix file socket used by the ssh agent.
logrus.Debugf("Found SSH_AUTH_SOCK %q, ssh-agent signer enabled", sock)
c, err := net.Dial("unix", sock)
if err != nil {
- return "", err
+ return nil, err
}
agentSigners, err := agent.NewClient(c).Signers()
if err != nil {
- return "", err
+ return nil, err
}
signers = append(signers, agentSigners...)
@@ -236,11 +282,9 @@ func getUDS(cmd *cobra.Command, uri *url.URL) (string, error) {
}
}
}
-
- var authMethods []ssh.AuthMethod
+ var authMethods []ssh.AuthMethod // now we validate and check for the authorization methods, most notaibly public key authorization
if len(signers) > 0 {
var dedup = make(map[string]ssh.Signer)
- // Dedup signers based on fingerprint, ssh-agent keys override CONTAINER_SSHKEY
for _, s := range signers {
fp := ssh.FingerprintSHA256(s.PublicKey())
if _, found := dedup[fp]; found {
@@ -253,60 +297,28 @@ func getUDS(cmd *cobra.Command, uri *url.URL) (string, error) {
for _, s := range dedup {
uniq = append(uniq, s)
}
-
authMethods = append(authMethods, ssh.PublicKeysCallback(func() ([]ssh.Signer, error) {
return uniq, nil
}))
}
-
- if passwdSet {
+ if passwdSet { // if password authentication is given and valid, add to the list
authMethods = append(authMethods, ssh.Password(passwd))
}
-
if len(authMethods) == 0 {
authMethods = append(authMethods, ssh.PasswordCallback(func() (string, error) {
pass, err := terminal.ReadPassword(fmt.Sprintf("%s's login password:", uri.User.Username()))
return string(pass), err
}))
}
-
+ tick, err := time.ParseDuration("40s")
+ if err != nil {
+ return nil, err
+ }
cfg := &ssh.ClientConfig{
User: uri.User.Username(),
Auth: authMethods,
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+ Timeout: tick,
}
- dial, err := ssh.Dial("tcp", uri.Host, cfg)
- if err != nil {
- return "", errors.Wrapf(err, "failed to connect")
- }
- defer dial.Close()
-
- session, err := dial.NewSession()
- if err != nil {
- return "", errors.Wrapf(err, "failed to create new ssh session on %q", uri.Host)
- }
- defer session.Close()
-
- // Override podman binary for testing etc
- podman := "podman"
- if v, found := os.LookupEnv("PODMAN_BINARY"); found {
- podman = v
- }
- run := podman + " info --format=json"
-
- var buffer bytes.Buffer
- session.Stdout = &buffer
- if err := session.Run(run); err != nil {
- return "", err
- }
-
- var info define.Info
- if err := json.Unmarshal(buffer.Bytes(), &info); err != nil {
- return "", errors.Wrapf(err, "failed to parse 'podman info' results")
- }
-
- if info.Host.RemoteSocket == nil || len(info.Host.RemoteSocket.Path) == 0 {
- return "", errors.Errorf("remote podman %q failed to report its UDS socket", uri.Host)
- }
- return info.Host.RemoteSocket.Path, nil
+ return cfg, nil
}
diff --git a/cmd/podman/system/connection/shared.go b/cmd/podman/system/connection/shared.go
new file mode 100644
index 000000000..3fd7c59fb
--- /dev/null
+++ b/cmd/podman/system/connection/shared.go
@@ -0,0 +1,28 @@
+package connection
+
+import (
+ "bytes"
+
+ "github.com/pkg/errors"
+ "golang.org/x/crypto/ssh"
+)
+
+// ExecRemoteCommand takes a ssh client connection and a command to run and executes the
+// command on the specified client. The function returns the Stdout from the client or the Stderr
+func ExecRemoteCommand(dial *ssh.Client, run string) (string, error) {
+ sess, err := dial.NewSession() // new ssh client session
+ if err != nil {
+ return "", err
+ }
+ defer sess.Close()
+
+ var buffer bytes.Buffer
+ var bufferErr bytes.Buffer
+ sess.Stdout = &buffer // output from client funneled into buffer
+ sess.Stderr = &bufferErr // err form client funneled into buffer
+ if err := sess.Run(run); err != nil { // run the command on the ssh client
+ return "", errors.Wrapf(err, bufferErr.String())
+ }
+ out := buffer.String() // output from command
+ return out, nil
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-08 17:44:14 +0000