fix(#45): Add HTTP security headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options)#181
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…ns, X-Content-Type-Options) - Add SecurityHeadersMiddleware to inject CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy on all responses - Enable Strict-Transport-Security only when ENV_VERSION=PROD - Add security headers to nginx production config (quantara.conf) - Add security headers to nginx dev config (quantara_dev.conf) - Add unit tests for middleware registration, header presence, and HSTS environment gating Closes Quantarq#45
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Summary
Adds HTTP security headers to FastAPI responses (via ASGI middleware) and nginx configs as defense-in-depth against XSS, clickjacking, MIME-sniffing, and protocol-downgrade attacks.
Changes
FastAPI middleware (
quantara/web_app/api/middleware.py)SecurityHeadersMiddlewareASGI middleware that injects:Content-Security-Policy: restricts sources to self, stellar.org, and FreighterX-Frame-Options: DENY: prevents clickjackingX-Content-Type-Options: nosniff: prevents MIME-sniffingReferrer-Policy: strict-origin-when-cross-origin: controls referrer infoStrict-Transport-Security(only whenENV_VERSION=PROD): enforces HTTPSNginx configs
quantara/frontend/quantara.conf: Added security headeradd_headerdirectivesquantara/frontend/quantara_dev.conf: Added security headeradd_headerdirectives with shorter HSTS (1 day) for devTests
quantara/web_app/tests/test_security_headers.py: Tests for middleware registration, header presence, and HSTS environment gatingCloses #45