40 lines
1.6 KiB
Go
40 lines
1.6 KiB
Go
package keymgr
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import (
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"fmt"
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"strings"
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)
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// RenderClientConfig produces an OpenSSH client config (works identically on
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// Windows' built-in OpenSSH client, macOS, and Linux). It defines exactly
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// one connection, "jump", carrying one LocalForward per allowed service —
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// the user opens it once (see INSTRUCTIONS.txt) and every service becomes
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// reachable at once on the listed local ports, for as long as that one
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// connection stays open.
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//
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// This file is convenience only, not a security boundary: nothing stops a
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// user from editing it or invoking ssh by hand. The actual restriction to
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// these destinations is enforced server-side via authorized_keys
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// permitopen= (see internal/sysadm/authorizedkeys.go) independent of what
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// this file says.
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func RenderClientConfig(jumpHost string, jumpPort int, username, keyFileName string, forwards []AllocatedForward) string {
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var b strings.Builder
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fmt.Fprintf(&b, "# ssh-access-tui client config for %s\n", username)
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fmt.Fprintf(&b, "# Generated %s. Regenerated whenever your allowed services change.\n\n", genTimestamp())
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fmt.Fprintf(&b, "Host jump\n")
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fmt.Fprintf(&b, " HostName %s\n", jumpHost)
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fmt.Fprintf(&b, " Port %d\n", jumpPort)
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fmt.Fprintf(&b, " User %s\n", username)
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fmt.Fprintf(&b, " IdentityFile ~/.ssh/%s\n", keyFileName)
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fmt.Fprintf(&b, " IdentitiesOnly yes\n")
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for _, f := range forwards {
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comment := f.HostName + "/" + f.ServiceName
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if f.Description != "" {
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comment += ": " + f.Description
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}
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fmt.Fprintf(&b, " LocalForward %d %s:%d # %s\n", f.LocalPort, f.Address, f.Port, comment)
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}
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return b.String()
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}
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