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chore(hooks): flag tailnet hostnames and CGNAT IPs in the secret scan

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Extend the pre-commit secret-scan to catch environment-specific values
(*.ts.net MagicDNS names and 100.64.0.0/10 tailnet IPs) so live infra can't be
committed into code, docs, or examples. Verified: detects leaks, no false
positive on 192.0.2.x or non-CGNAT 100.x, and the script does not self-trip.
This commit is contained in:
Offending Commit
2026-06-02 15:12:33 -05:00
parent 239eb3327a
commit 1aa1c0456f
1 changed files with 7 additions and 2 deletions
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9
scripts/secret-scan.sh
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@@ -52,12 +52,17 @@ check_pattern "Honcho-style JWT (likely)" 'eyJ[A-Za-z0-9_-]{20,}\.eyJ[A-Za-z0-9_
check_pattern "RSA/EC/DSA/OpenSSH private key block" '-----BEGIN (RSA |EC |DSA |OPENSSH )?PRIVATE KEY-----'
check_pattern "Generic hardcoded password" '(password|passwd|pwd)[[:space:]]*[:=][[:space:]]*["'\'']\w{8,}["'\'']'
# Environment-specific values — keep live infra out of committed code/docs/PRs.
# Use examples instead (honcho.example.net; 192.0.2.x per RFC 5737 TEST-NET).
check_pattern "Tailnet hostname (env-specific; use example.net)" '[A-Za-z0-9-]+\.ts\.net'
check_pattern "Tailnet/CGNAT IP (env-specific; use 192.0.2.x)" '100\.(6[4-9]|[7-9][0-9]|1[01][0-9]|12[0-7])\.[0-9]{1,3}\.[0-9]{1,3}'
if [ $FOUND -eq 1 ]; then
printf '\n\033[31m✗ Secret scan: potential secrets in staged changes\033[0m\n' >&2
printf '\n\033[31m✗ Secret scan: potential secrets or environment-specific values in staged changes\033[0m\n' >&2
printf '%b' "$FINDINGS" >&2
printf '\n' >&2
printf 'If this is a false positive, bypass with: \033[33mgit commit --no-verify\033[0m\n' >&2
printf 'Otherwise: remove the secret, rotate the credential, and re-stage.\n\n' >&2
printf 'Otherwise: remove the secret/value (use an example), rotate if a credential, and re-stage.\n\n' >&2
exit 1
fi