docs(kms): guard outward FIPS wording (#5624)

scripts/check_fips_wording.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Guard: outward README and CHANGELOG material must not make an unsupported
+# FIPS validation or certification claim. The detailed policy and permitted
+# qualifiers live in docs/operations/kms-cryptographic-compliance.md; this
+# check intentionally scans only the two public project-facing documents.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="${CHECK_FIPS_WORDING_ROOT:-$(cd "${SCRIPT_DIR}/.." && pwd)}"
+
+cd "$ROOT_DIR"
+
+TARGETS=(README.md CHANGELOG.md)
+FORBIDDEN_PATTERNS=(
+  'FIPS[[:space:]]+(140-[23](/[[:space:]]*140-[23])?[[:space:]]+)?(validated|certified|compliant)'
+  'FIPS[[:space:]]+mode'
+  'FIPS-enabled'
+  'NIST[[:space:]]+(certified|approved)'
+  'CMVP[[:space:]]+certificate'
+  '(meets|satisfies)[[:space:]]+FIPS'
+)
+
+status=0
+
+for target in "${TARGETS[@]}"; do
+  if [[ ! -f "$target" ]]; then
+    printf 'FIPS wording guard failed: %s is missing\n' "$target" >&2
+    status=1
+    continue
+  fi
+
+  for pattern in "${FORBIDDEN_PATTERNS[@]}"; do
+    matches="$(grep -E -i -n -- "$pattern" "$target" || true)"
+    if [[ -n "$matches" ]]; then
+      printf 'FIPS wording guard failed: forbidden pattern /%s/ in %s:\n%s\n' \
+        "$pattern" "$target" "$matches" >&2
+      status=1
+    fi
+  done
+done
+
+if [[ "$status" -ne 0 ]]; then
+  printf 'Remove unsupported FIPS validation wording from README.md or CHANGELOG.md.\n' >&2
+  exit "$status"
+fi
+
+printf 'FIPS wording guard passed (README.md and CHANGELOG.md contain no forbidden claims).\n'