50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
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package agentci
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import (
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"fmt"
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"os/exec"
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"path/filepath"
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"regexp"
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"strings"
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)
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var safeNameRegex = regexp.MustCompile(`^[a-zA-Z0-9\-\_\.]+$`)
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// SanitizePath ensures a filename or directory name is safe and prevents path traversal.
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// Returns filepath.Base of the input after validation.
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func SanitizePath(input string) (string, error) {
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base := filepath.Base(input)
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if !safeNameRegex.MatchString(base) {
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return "", fmt.Errorf("invalid characters in path element: %s", input)
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}
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if base == "." || base == ".." || base == "/" {
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return "", fmt.Errorf("invalid path element: %s", base)
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}
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return base, nil
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}
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// EscapeShellArg wraps a string in single quotes for safe remote shell insertion.
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// Prefer exec.Command arguments over constructing shell strings where possible.
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func EscapeShellArg(arg string) string {
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return "'" + strings.ReplaceAll(arg, "'", "'\\''") + "'"
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}
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// SecureSSHCommand creates an SSH exec.Cmd with strict host key checking and batch mode.
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func SecureSSHCommand(host string, remoteCmd string) *exec.Cmd {
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return exec.Command("ssh",
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"-o", "StrictHostKeyChecking=yes",
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"-o", "BatchMode=yes",
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"-o", "ConnectTimeout=10",
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host,
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remoteCmd,
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)
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}
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// MaskToken returns a masked version of a token for safe logging.
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func MaskToken(token string) string {
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if len(token) < 8 {
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return "*****"
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}
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return token[:4] + "****" + token[len(token)-4:]
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}
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