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====== Recipies ======
Quick recipies for different tasks

===== Credentials and More =====
Recipies for handling credentials and authentication things

==== Import OTP QRCode into KeePassXC ====

  - Copy the exported qr code to your client.
  - Extract the otp string with zbarimg <code>
zbarimg /path/to/qrcode.png
QR-Code:otpauth-migration://offline?data=XXXX
scanned 1 barcode symbols from 1 images in 0.12 seconds
</code>
  - Convert the code with otpauth <code>
otpauth -link "otpauth-migration://offline?data=XXXX"
otpauth://totp/USER@XXX?algorithm=SHA1&digits=6&issuer=ISSUER&period=30&secret=SECRET
</code>
  - Import the OTP in KeePassXC {{muf:it:images:otp_keepassxc.png}} 

==== Hide & Seek ====

All stuff about searching everywhre and everything ;)

=== Git I'll find you :P ===

Git I'll find you :P
Full-history regex scan (mirror clone)

Below is a ready-to-run shell helper that clones a repo as a mirror (so all refs/tags are included) and executes regex searches across all commits / blobs.

Save as scan_public_repo_regex.sh, make executable and run.

<code> #!/usr/bin/env bash # scan_public_repo_regex.sh # Usage: # ./scan_public_repo_regex.sh <repo-url> "<positive-regex>" ["<exclude-regex>"] # # Notes: # - The script does a git --mirror clone to include all refs (branches/tags). # - It uses `git grep -P` (Perl regex). If not available, it falls back to -G + external grep. # - Provide PCRE patterns (Perl compatible) for advanced constructs like (?!negative). # set -euo pipefail

REPO_URL="${1:-}"
PATTERN="${2:-}"
EXCLUDE="${3:-}"

if [[ -z "$REPO_URL" || -z "$PATTERN" ]]; then
cat <<USAGE
Usage: $0 <repo-url> "<positive-regex>" ["<exclude-regex>"]
Example:
$0 https://github.com/owner/repo.git
 '(?i)\b(user|username)\b\s*[:=]\s*["''']?([^\s,"''']+)' '(?i)username'
USAGE
exit 2
fi

TMP="$(mktemp -d)"
trap 'rm -rf "$TMP"' EXIT
cd "$TMP"

echo "[*] Cloning mirror of '$REPO_URL' into $TMP/repo.git (this may take a while)..."
git clone --mirror "$REPO_URL" repo.git >/dev/null 2>&1
cd repo.git

REVLIST="$(git rev-list --all)"
if [[ -z "$REVLIST" ]]; then
echo "[!] no refs found"
exit 1
fi

echo "[] Running git grep across all commits (pattern):"
echo " $PATTERN"
if [[ -n "$EXCLUDE" ]]; then
echo "[] Exclude pattern:"
echo " $EXCLUDE"
fi
echo

Try PCRE first; fallback otherwise

set +e
if git grep -P -n --text --heading --break -e "$PATTERN" $REVLIST >/dev/null 2>&1; then
if [[ -n "$EXCLUDE" ]]; then
git grep -P -n --text --heading --break -e "$PATTERN" $REVLIST
| grep -P -v --color=never "$EXCLUDE" || true
else
git grep -P -n --text --heading --break -e "$PATTERN" $REVLIST || true
fi
else
echo "[*] git grep -P not available or failed, falling back to POSIX regex and grep filter."
if [[ -n "$EXCLUDE" ]]; then
git grep -n --text --heading --break -G -e "$PATTERN" $REVLIST
| ( grep -P -v --color=never "$EXCLUDE" 2>/dev/null || grep -E -v "$EXCLUDE" || true )
else
git grep -n --text --heading --break -G -e "$PATTERN" $REVLIST || true
fi
fi
set -e

echo
echo "[*] Also scanning commit messages (git log --grep)..."
if [[ -n "$EXCLUDE" ]]; then
git log --all --pretty=fuller --grep="$PATTERN" -i
| awk '/^commit /{c=$2} /'"$PATTERN"'/i{print c; print; print "----"}'
| xargs -I{} bash -c 'git show --pretty=fuller {} || true'
| ( grep -P -v --color=never "$EXCLUDE" 2>/dev/null || grep -E -v "$EXCLUDE" || cat )
else
git log --all --pretty=fuller --grep="$PATTERN" -i || true
fi

echo
echo "[*] Done. Temp dir: $TMP (auto-removed on exit)."
</code>

Quick usage examples

Literal / case-insensitive search for EXACT_STRING (YOUR-EXACT-STRING):

<code>

./scan_public_repo_regex.sh https://github.com/owner/repo.git
 '(?i)YOUR-EXACT-STRING'
</code>

Regex search: find keys like user: username or user = username (case-insensitive):

<code>

'(?i)\b(user|username)\b\s*[:=]\s*["']?([^\s,"']+)'
</code>

Search for password variants (password, passwd, pwd) next to a value:

<code>

'(?i)\b(pass(word)?|passwd|pwd)\b\s*[:=]\s*["']?([^\s,"']{4,})'
</code>

Combined: look for any auth/token/key-like identifiers:

<code>

'(?i)\b(api[-]?key|apikey|secret|token|auth|access[-]?token|bearer|private[-]?key|ssh[-]?key)\b\s*[:=]\s*["']?([A-Za-z0-9-._]+)'
</code>

Your “SEARCH FOR but EXCLUDE exact username/password” (negative lookahead, PCRE):

<code>

'(?i)\buser\b\s*[:=]\s*(?!username\b)([^\s,]+)'
'(?i)\bpass(word)?\b\s*[:=]\s*(?!secret\b)([^\s,]+)'
</code>
This finds user: <value> where the value is not username, and pass: <value> where the value is not secret.

Notes on the examples & intuition

Why so many variants? Humans store credentials in many ways. Use these families:

Key names: user, username, uid, owner · pass, passwd, password, pwd · secret, api_key, apikey, api-key · token, auth, access_token, bearer · key, private_key, ssh_key, rsa_key · client_id, client_secret

Separators: key: value · key = value · key => value · "key": "value"

Value patterns: Base64-like [A-Za-z0-9+/=]{20,} (noisy), long alphanumerics with -_.

Practical approach:

Start literal with YOUR-EXACT-STRING (fast, exact).

Expand to key families: password|passwd|pwd|secret|token|api[_-]?key.

Add context anchors: check left key names or separators.

Need to ignore a known safe value → negative lookahead (?!value) or post-filter grep -v.

Too much noise → restrict file types (*.env, *.yaml, *.json, *.tf, *.ini).

Regex cheat-sheet (PCRE, case-insensitive)

Simple literal (case-insensitive)

<code>

(?i)YOUR-EXACT-STRING
</code>

Keys + value (JSON/YAML/INI friendly)

<code>

(?i)\b(user|username|uid)\b\s*[:=]\s*["']?([^\s,"']+)
(?i)\b(pass(word)?|passwd|pwd)\b\s*[:=]\s*["']?([^\s,"']{4,})
</code>

Auth/token/key family

<code>

(?i)\b(api[-]?key|apikey|secret|token|auth|access[-]?token|bearer|private[-]?key|ssh[-]?key)\b\s*[:=]\s*["']?([A-Za-z0-9-._]{8,})
</code>

Base64-ish blobs (suspicious but noisy)

<code>

[A-Za-z0-9+/]{40,}={0,2}
</code>

URL with embedded basic auth (user:pass@host)

<code>

(?i)https?://[^/\s:@]+:[^@\s]+@[^/\s]+
</code>

“SEARCH FOR but EXCLUDE” (negative lookahead)

<code>

(?i)\buser\b\s*[:=]\s*(?!username\b)([^\s,]+)
(?i)\bpass\b\s*[:=]\s*(?!secret\b)([^\s,]+)
</code>

Practical tips

Use literal -F for your exact known string first — zero false positives.

To exclude a test token: post-filter with grep -v or use PCRE negative lookahead.

If your git grep lacks -P, fallback with git grep -G then pipe into grep -P or perl.

Limit file types to reduce noise:

<code>

git grep -P -n -I --heading --break -e '(?i)password' $(git rev-list --all) -- '.py' '.yaml' '.env' '.json' || true
</code>

Inspect matches precisely:

<code>

git show <commit-sha>:<path/to/file>
</code>

Example workflows

Exact-string quick check (literal):

<code>

./scan_public_repo_regex.sh https://github.com/owner/repo.git
 '(?i)YOUR-EXACT-STRING'
</code>

Password-like keys but ignore known placeholder secret:

<code>

./scan_public_repo_regex.sh https://github.com/owner/repo.git
 '(?i)\b(pass(word)?|passwd|pwd)\b\s*[:=]\s*["']?([^\s,"']{4,})' 'secret'
</code>

Any API keys/tokens:

<code>

./scan_public_repo_regex.sh https://github.com/owner/repo.git
 '(?i)\b(api[-]?key|apikey|secret|token|auth)\b\s*[:=]\s*["']?([A-Za-z0-9-.]{8,})'
</code>

Safety / assurance notes

This script only reads repo objects; it does not modify the remote.

If you find a secret in the public repo, rotate/revoke immediately; rewrite history afterwards.

PCRE-first: the script attempts -P and falls back if unavailable.

===== OS Tricks =====
Operating system specific recipies

==== Win11 offline installation ====

  - During setup when asked for connecting to a network press SHIFT+F10 to open a cmd
  - In the opened cmd type <code>oobe\BypassNRO</code>
  - After reboot you can procceed the installation and skip the network configuration
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