Add NVIDIA stress loader selection and DCGM 4 support

iso/builder/build-john.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+# build-john.sh — build John the Ripper jumbo with OpenCL support for the LiveCD.
+#
+# Downloads a pinned source snapshot from the official openwall/john repository,
+# builds it inside the builder container, and caches the resulting run/ tree.
+
+set -e
+
+JOHN_COMMIT="$1"
+DIST_DIR="$2"
+
+[ -n "$JOHN_COMMIT" ] || { echo "usage: $0 <john-commit> <dist-dir>"; exit 1; }
+[ -n "$DIST_DIR" ] || { echo "usage: $0 <john-commit> <dist-dir>"; exit 1; }
+
+echo "=== John the Ripper jumbo ${JOHN_COMMIT} ==="
+
+CACHE_DIR="${DIST_DIR}/john-${JOHN_COMMIT}"
+CACHE_ROOT="${BEE_CACHE_DIR:-${DIST_DIR}/cache}"
+DOWNLOAD_CACHE_DIR="${CACHE_ROOT}/john-downloads"
+SRC_TAR="${DOWNLOAD_CACHE_DIR}/john-${JOHN_COMMIT}.tar.gz"
+SRC_URL="https://github.com/openwall/john/archive/${JOHN_COMMIT}.tar.gz"
+
+if [ -x "${CACHE_DIR}/run/john" ] && [ -f "${CACHE_DIR}/run/john.conf" ]; then
+    echo "=== john cached, skipping build ==="
+    echo "run dir: ${CACHE_DIR}/run"
+    exit 0
+fi
+
+mkdir -p "${DOWNLOAD_CACHE_DIR}"
+if [ ! -f "${SRC_TAR}" ]; then
+    echo "=== downloading john source snapshot ==="
+    wget --show-progress -O "${SRC_TAR}" "${SRC_URL}"
+fi
+
+BUILD_TMP=$(mktemp -d)
+trap 'rm -rf "${BUILD_TMP}"' EXIT INT TERM
+
+cd "${BUILD_TMP}"
+tar xf "${SRC_TAR}"
+SRC_DIR=$(find . -maxdepth 1 -type d -name 'john-*' | head -1)
+[ -n "${SRC_DIR}" ] || { echo "ERROR: john source directory not found"; exit 1; }
+
+cd "${SRC_DIR}/src"
+echo "=== configuring john ==="
+./configure
+echo "=== building john ==="
+make clean >/dev/null 2>&1 || true
+make -j"$(nproc)"
+
+mkdir -p "${CACHE_DIR}"
+cp -a "../run" "${CACHE_DIR}/run"
+chmod +x "${CACHE_DIR}/run/john"
+
+echo "=== john build complete ==="
+echo "run dir: ${CACHE_DIR}/run"