{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "pub-9-tranche-59-v1", "route_id": "agentic_reviewed_http_digest_preference_not_negotiated_guarantee", "record_id": "VXI-EXT-PROCUREMENT-HTTP-DIGEST-PREFERENCE-NOT-NEGOTIATED-GUARANTEE-01-v1", "question": "Does requesting an HTTP digest guarantee that the peer supplied and validated the preferred integrity evidence?", "answer": "RFC 9530 treats Want-Content-Digest and Want-Repr-Digest as hints. A peer may use another algorithm or omit the digest without a protocol error. Applications can impose stronger requirements, and recipients may otherwise ignore supplied digests. Requested preferences do not establish delivery or validation of the integrity evidence required by a buyer.", "records": [ { "record_id": "VXI-EXT-PROCUREMENT-HTTP-DIGEST-PREFERENCE-NOT-NEGOTIATED-GUARANTEE-01-v1", "url": "/varexis-index/records/http-digest-preference-not-negotiated-guarantee.json", "content_sha256": "27bd1397adf9c4886c2e9aba988c3aa9008c11b1c7cf5daf0fde1bccec082c53", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-25T20:55:19.974986+00:00", "record_id": "VXI-EXT-PROCUREMENT-HTTP-DIGEST-PREFERENCE-NOT-NEGOTIATED-GUARANTEE-01-v1", "record_kind": "external_reference", "title": "HTTP digest preferences and actual validation", "system": "IETF RFC 9530", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Does requesting an HTTP digest guarantee that the peer supplied and validated the preferred integrity evidence?", "near_questions": [ "Must a server honor Want-Content-Digest?", "Can an HTTP response omit a requested digest without a protocol error?", "Does asking for SHA-256 prove that it was validated?", "Where must mandatory HTTP integrity requirements be enforced?" ], "supported_claims": [ { "claim": "RFC 9530 treats Want-Content-Digest and Want-Repr-Digest as hints. A peer may use another algorithm or omit the digest without a protocol error. Applications can impose stronger requirements, and recipients may otherwise ignore supplied digests. Requested preferences do not establish delivery or validation of the integrity evidence required by a buyer.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "The peer may ignore preferences without a protocol error; application policy and actual digest validation must establish the requirement.", "Buyer implementation, live runtime enforcement, settled payment, physical outcome, certification or permission to act are not established.", "No expanded capabilities or licences for existing INDEX executables." ], "public_summary": "RFC 9530 treats Want-Content-Digest and Want-Repr-Digest as hints. A peer may use another algorithm or omit the digest without a protocol error. Applications can impose stronger requirements, and recipients may otherwise ignore supplied digests. Requested preferences do not establish delivery or validation of the integrity evidence required by a buyer.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "IETF RFC 9530", "source_url": "https://www.rfc-editor.org/rfc/rfc9530.txt", "checked_on": "2026-10-25", "candidate_record_id": "VXI-EXT-PROCUREMENT-HTTP-DIGEST-PREFERENCE-NOT-NEGOTIATED-GUARANTEE-01-v1", "candidate_record_sha256": "95d83a64ad1d77be39cbd580232e423d0eb3b8275e26b05d1af09f46aaf72db8", "method": "Primary documentation reviewed for the published bounded statement.", "deployment_tested_by_varexis": false, "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research." }, "answer_policy": { "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY", "bounded_answer": "RFC 9530 treats Want-Content-Digest and Want-Repr-Digest as hints. A peer may use another algorithm or omit the digest without a protocol error. Applications can impose stronger requirements, and recipients may otherwise ignore supplied digests. Requested preferences do not establish delivery or validation of the integrity evidence required by a buyer.", "required_buyer_context": "Sent integrity preferences; Received digest fields and algorithms; Application validation policy and result. Buyer deployment not inspected.", "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state." }, "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.", "decision_profile": { "schema": "varexis-vendor-evidence-review/1", "review_status": "documentation_review_only", "checked_on": "2026-10-25", "claim_to_check": "Does requesting an HTTP digest guarantee that the peer supplied and validated the preferred integrity evidence?", "documented_statement": { "status": "documented", "statement": "RFC 9530 treats Want-Content-Digest and Want-Repr-Digest as hints. A peer may use another algorithm or omit the digest without a protocol error. Applications can impose stronger requirements, and recipients may otherwise ignore supplied digests. Requested preferences do not establish delivery or validation of the integrity evidence required by a buyer.", "source_ids": [ "rfc9530" ] }, "review_inference": { "status": "review_inference", "statement": "Decide whether a requested digest algorithm guarantees that a response supplied or validated integrity evidence. This is a documentation-review judgment, not an observed deployment outcome.", "source_ids": [ "rfc9530" ] }, "buyer_evidence_required": [ "Sent integrity preferences", "Received digest fields and algorithms", "Application validation policy and result" ], "review_condition": { "status": "varexis_review_policy", "statement": "Refuse buyer-specific assurance from documentation alone. The peer may ignore preferences without a protocol error; application policy and actual digest validation must establish the requirement." }, "unknowns": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected.", "unknown_finding": { "status": "unknown", "statement": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected." }, "evidence_sources": [ { "source_id": "rfc9530", "url": "https://www.rfc-editor.org/rfc/rfc9530.txt", "final_url": "https://www.rfc-editor.org/rfc/rfc9530.txt", "status": 200, "captured_at_utc": "2026-10-25T20:26:12.731Z", "sha256": "544dbb7d9afceafa8c9931d9924ca6cff2b4807274166d7ed2483342ef2cdd6a", "bytes": 67152, "title": "IETF RFC 9530", "hash_basis": "SHA-256 of unmodified HTTP response body bytes", "rights_review": "Original factual paraphrase of the cited IETF RFC; IETF Trust and contributor rights remain applicable. No RFC text, code component or modified standard is redistributed.", "checked_on": "2026-10-25", "capture_status": 200, "claim_review_completed": true, "reviewed_sections": [ "2", "3", "3.1", "4" ], "version_context": "Fixed IETF RFC 9530 publication; later applicable updates and actual implementation conformance require separate review." } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.", "paid_value": { "decision_context": "Decide whether a requested digest algorithm guarantees that a response supplied or validated integrity evidence.", "free": "Complete review, practical questions, sources and limitations; may be saved locally.", "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.", "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.", "excluded": [ "Fresh vendor research", "Continuous monitoring or change alerts", "Testing the buyer configuration", "Private evidence or vendor certification" ], "integrity": "Hashes identify content versions; they do not prove truth or provide a signature." }, "revalidation": { "trigger": "A saved purchase does not recheck the source or buyer configuration.", "specific_watch": "Recheck 4 in IETF RFC 9530 when the source, applicable version, configuration or intended reliance changes. A detected change creates a review candidate, not automatic approval." }, "buyer_relevance": "Decide whether a requested digest algorithm guarantees that a response supplied or validated integrity evidence.", "refusal_conditions": [ "Refuse buyer-specific assurance from documentation alone. The peer may ignore preferences without a protocol error; application policy and actual digest validation must establish the requirement." ] }, "niche": { "niche_id": "agent-authority-action-evidence", "label": "Agent Authority & Action Evidence", "classification_id": "audit", "classification_label": "Audit, Provenance & Evidence Accountability", "topic_id": "audit", "buyer_intent": "Decide whether a requested digest algorithm guarantees that a response supplied or validated integrity evidence.", "comparison_role": "supplementary_discovery" }, "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.", "service_route": { "request_guide": "/varexis-index/request.html", "request_workflow": "/varexis-index/request-workflow.json", "service_id": "single_request", "service_routes_url": "/varexis-index/service-routes.json", "payment_required": true, "availability_endpoint": "/api/index/capabilities", "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED", "checkout_url": "/index-access" }, "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.", "human_page": "/varexis-index/catalog.html#http-digest-preference-not-negotiated-guarantee", "machine_readable_record": "/varexis-index/records/http-digest-preference-not-negotiated-guarantee.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "efe761303cf8f616a529010aff7780d995ad348628bb4689eebbad1db17f000d" }