1aa1c0456f
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.
70 lines
3.0 KiB
Bash
Executable File
70 lines
3.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Secret scan for staged files.
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#
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# Pre-commit hook calls this against staged additions. Fast (no external
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# tool; just regex over the staged diff). Designed to catch the common
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# accidents — API keys committed alongside code — not to replace a full
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# secret-scanning service.
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#
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# Exits non-zero with a clear message if a likely secret is found.
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set -euo pipefail
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# Only scan added/modified content (the `+` lines in the staged diff).
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# This avoids false positives from existing committed strings.
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STAGED_DIFF=$(git diff --cached --diff-filter=ACMR --unified=0 -- '*.ts' '*.tsx' '*.js' '*.jsx' '*.json' '*.yml' '*.yaml' '*.toml' '*.env*' '*.sh' '*.md' 2>/dev/null || true)
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if [ -z "$STAGED_DIFF" ]; then
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exit 0
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fi
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# Only look at added lines (starting with `+`, excluding diff headers `+++`).
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ADDED=$(printf '%s\n' "$STAGED_DIFF" | grep -E '^\+[^+]' || true)
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if [ -z "$ADDED" ]; then
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exit 0
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fi
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FOUND=0
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FINDINGS=""
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check_pattern() {
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local name="$1"
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local pattern="$2"
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# Use `-e` to safely pass patterns that begin with `-` (e.g. PEM headers).
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if printf '%s\n' "$ADDED" | grep -qE -e "$pattern"; then
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FOUND=1
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FINDINGS="${FINDINGS} - ${name}\n"
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fi
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}
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check_pattern "AWS access key" 'AKIA[0-9A-Z]{16}'
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check_pattern "AWS secret key (high-entropy)" 'aws_secret_access_key[[:space:]]*[:=][[:space:]]*[A-Za-z0-9/+=]{40}'
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check_pattern "Anthropic API key" 'sk-ant-[a-zA-Z0-9_-]{32,}'
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check_pattern "OpenAI API key" 'sk-[a-zA-Z0-9]{20,}T3BlbkFJ[a-zA-Z0-9]{20,}'
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check_pattern "OpenAI project key (newer)" 'sk-proj-[a-zA-Z0-9_-]{40,}'
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check_pattern "GitHub personal access token" 'gh[psoru]_[A-Za-z0-9_]{36,}'
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check_pattern "GitHub fine-grained PAT" 'github_pat_[A-Za-z0-9_]{82,}'
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check_pattern "Slack token" 'xox[abprs]-[A-Za-z0-9-]{10,}'
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check_pattern "Google API key" 'AIza[0-9A-Za-z_-]{35}'
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check_pattern "Stripe live key" 'sk_live_[A-Za-z0-9]{24,}'
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check_pattern "Honcho-style JWT (likely)" 'eyJ[A-Za-z0-9_-]{20,}\.eyJ[A-Za-z0-9_-]{20,}\.[A-Za-z0-9_-]{20,}'
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check_pattern "RSA/EC/DSA/OpenSSH private key block" '-----BEGIN (RSA |EC |DSA |OPENSSH )?PRIVATE KEY-----'
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check_pattern "Generic hardcoded password" '(password|passwd|pwd)[[:space:]]*[:=][[:space:]]*["'\'']\w{8,}["'\'']'
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# Environment-specific values — keep live infra out of committed code/docs/PRs.
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# Use examples instead (honcho.example.net; 192.0.2.x per RFC 5737 TEST-NET).
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check_pattern "Tailnet hostname (env-specific; use example.net)" '[A-Za-z0-9-]+\.ts\.net'
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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}'
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if [ $FOUND -eq 1 ]; then
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printf '\n\033[31m✗ Secret scan: potential secrets or environment-specific values in staged changes\033[0m\n' >&2
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printf '%b' "$FINDINGS" >&2
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printf '\n' >&2
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printf 'If this is a false positive, bypass with: \033[33mgit commit --no-verify\033[0m\n' >&2
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printf 'Otherwise: remove the secret/value (use an example), rotate if a credential, and re-stage.\n\n' >&2
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exit 1
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fi
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exit 0
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