96 lines
3.6 KiB
Bash
96 lines
3.6 KiB
Bash
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#!/usr/bin/env bash
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# probe.sh — mesure la mise en place d'un rate-limiting / lockout sur
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# l'endpoint d'authentification (ou tout endpoint sensible) de la
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# preprod.
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#
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# USAGE
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# ./probe.sh [targets.env]
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#
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# Envoie RATE_PROBE_COUNT requêtes rapides (identiques, échec volontaire)
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# sur LOGIN_PATH et observe l'évolution des codes HTTP :
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# - 429 trop tôt → rate-limit agressif (pe-être trop pour les
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# légitimes) ;
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# - jamais de 429, toujours 401/400 → AUCUN rate-limit : vulnérabilité
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# (bruteforce non freiné) ;
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# - verrouillage après N échecs (code change, ex 403/423) → lockout.
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#
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# Journalise dans $OUTPUT_DIR/rate-limit.log.
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COMMON_SH="$(cd "$(dirname "$0")/../.." && pwd)/lib/common.sh"
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# shellcheck disable=SC1091
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source "$COMMON_SH"
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load_target "${1:-}"
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mkdir -p "${OUTPUT_DIR:-./output}"
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LOG="${OUTPUT_DIR:-./output}/rate-limit.log"
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: > "$LOG"
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RATE_PROBE_COUNT="${RATE_PROBE_COUNT:-20}"
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RATE_PROBE_DELAY="${RATE_PROBE_DELAY:-0}" # 0 = rafale, par défaut
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# URL de login (même logique que brute-login).
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login_url() {
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case "${LOGIN_PATH:-}" in
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http*) printf '%s' "$LOGIN_PATH" ;;
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/*) printf '%s%s' "$TARGET_BASE_URL" "${LOGIN_PATH}" ;;
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*) printf '%s/%s' "$TARGET_BASE_URL" "${LOGIN_PATH}" ;;
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esac
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}
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URL="$(login_url)"
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assert_in_scope "$URL"
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info "Rate-limit probe : $RATE_PROBE_COUNT requêtes sur $URL"
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info "Délai entre requêtes : ${RATE_PROBE_DELAY}s (0 = rafale)"
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info "Journal : $LOG"
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# Corps d'échec volontaire (mauvais mot de passe). On ne cherche pas
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# à réussir ici, juste à saturer pour observer le rate-limit.
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build_bad_body() {
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case "${LOGIN_CONTENT_TYPE:-json}" in
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form)
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local u; u="$(printf '%s' "${LOGIN_USERNAME:-nobody}" | sed 's/[&+/@=%]/\\&/g')"
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printf 'grant_type=password&%s=%s&%s=definitely-wrong-pass-%%42' \
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"${LOGIN_USER_FIELD:-username}" "$u" "${LOGIN_PASS_FIELD:-password}"
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;;
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*)
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printf '{"%s":"%s","%s":"definitely-wrong-pass"}' \
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"${LOGIN_USER_FIELD:-username}" "${LOGIN_USERNAME:-nobody}" \
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"${LOGIN_PASS_FIELD:-password}"
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;;
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esac
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}
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ct() { case "${LOGIN_CONTENT_TYPE:-json}" in form) printf 'application/x-www-form-urlencoded';; *) printf 'application/json';; esac; }
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body="$(build_bad_body)"
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seen_429=0
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seen_lock=0
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first_change=""
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prev_code=""
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for i in $(seq 1 "$RATE_PROBE_COUNT"); do
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http_probe POST "$URL" -H "Content-Type: $(ct)" --data "$body"
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code="$LAST_CODE"
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printf '%s\t%3d/%d\t%s\n' "$(date -Is)" "$i" "$RATE_PROBE_COUNT" "$code" >> "$LOG"
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drop_body
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[[ "$code" == "429" ]] && seen_429=$((seen_429 + 1))
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# 423 Locked, ou un changement soudain de code après des 401 → lockout possible.
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if [[ "$code" == "423" || ( -n "$prev_code" && "$code" != "$prev_code" && "$code" != "429" ) ]]; then
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seen_lock=$((seen_lock + 1))
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[[ -z "$first_change" ]] && first_change="req $i : $prev_code → $code"
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fi
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prev_code="$code"
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[[ "${VERBOSE:-0}" == "1" ]] && printf ' %3d %s\n' "$i" "$code"
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[[ "$RATE_PROBE_DELAY" != "0" ]] && sleep "$RATE_PROBE_DELAY"
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done
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info "Résultats : $RATE_PROBE_COUNT requêtes, $seen_429 code(s) 429, $seen_lock changement(s) de code."
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if [[ -n "$first_change" ]]; then
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warn "Changement observé : $first_change (lockout possible)"
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fi
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if [[ "$seen_429" -eq 0 && -z "$first_change" ]]; then
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err "AUCUN rate-limit détecté (pas de 429, pas de verrouillage). Endpoint vulnérable au bruteforce."
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else
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ok "Rate-limiting actif ($seen_429 réponses 429). Voir $LOG pour le seuil."
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fi
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