structured-asic

Original-range ASiC-S and ASiC-E mechanisms for ETSI EN 319 162-1 and EN 319 162-2 V1.1.1. Format, mathematical, incorporation and historical facts remain separate from application trust and acceptance.

Original input and execution

Implement structured_asn1::range::RangeSource over immutable caller-owned ranges. Reads may suspend and return short positive results; the parser keeps the original document/generation/length identity and bounded scratch. A resident slice is a convenience, not a whole-file materialization requirement.

Session retains cumulative original work, entry and decode allowances. Every new operation also uses its current Work. All attacker-controlled traversal, copying, decompression and allocation are admitted before work; retained actual capacity charges follow their allocations. Snapshot changes, acquisition, unsupported methods, syntax and resource refusal keep distinct typed causes.

zip::Archive preserves every central-directory occurrence, exact UTF-8 filename, duplicate, overlap and local/header/descriptor discrepancy. Stored and raw DEFLATE streams enforce complete extent, decoded size and CRC. ZIP64 and signed or unsigned descriptors use the same original-source core. There is no OS extraction, path normalization, filename case folding or implicit resource fetch.

Inspection and composition

1. Read the full original archive and layout::Census. Select the explicit general, Part 1 baseline or Part 2 additional-container route. Layout facts cannot establish MIME association, authenticated coverage or a signature level.
2. Inspect complete original mimetype bytes with Member::read_media. package separately inspects source-produced ODF file declarations and OCF rootfiles. ODF full-path is an exact ZIP filename, not a percent-decoded URI. Root media equality checks the complete CRC-checked original member.
3. Supply the existing XML owner through xml::producer::Factory. The complete funded member moves into its actual parsed owner; the asynchronous visitor borrows that owner through completion. Only this closed scope creates retained manifest/package facts. An independently parsed snapshot cannot be attached.
4. Use xml::producer::signed::SignatureFactory for owning verified XML state. Its separate capability preserves all original roots, nested signatures, direct and signed-Manifest references, missing resources and incomplete catalogues. Resources transfers actual CRC-checked funded inputs and closed original-member receipts. The trusted XML owner binds those inputs to its actual verified reference operations. A resource receipt alone proves neither reference digest agreement nor signature coverage.
5. Read carried CAdES/TSP/ERS from Content with the same producing session. Detached CAdES uses one original payload pass and the existing common batch, requiring the full original root signer census before provider initialization. Actual signer/certificate/path binding and B-B/B-T/B-LT/B-LTA reports reuse the existing common stages. XML reports are source-bound in the producing scope.
6. Resolve every ASiC manifest instruction to its exact original members. Alias references share a native digest state and member pass, while every original declaration retains its own outcome. ERS uses the common asynchronous all-algorithm object pass, reduced-tree, timestamp and renewal implementation.
7. archive::Graph retains all original A.7 archive manifests and derives their order from explicit predecessor links. Each renewal preserves previous objects, manifests and timestamps. Exact token/input receipts and all object digests are independent of graph geometry, historical material, longevity and trust. A missing or bad latest occurrence never selects an older success.

XML parsing, namespace processing, canonicalization, XMLDSig and selected cryptographic engines stay with their existing owners. A structural XML adapter does not automatically implement owning asynchronous signature verification. No backend or complete native XML adapter is bundled here. XMLERS is identified as its distinct format; this crate does not substitute RFC 4998 for that grammar. Unassessed schema-instance, encryption and extension data remain explicit facts.

The runtime supports no_std + alloc and has no hidden clock, file or network access. Acquisition, path security policy, trusted roots, algorithm acceptance, reports and UI belong to the caller.

Install

The crate is available on crates.io and follows the coordinated version of the shared primitives:

structured-asic = "0.20"

Subsequent releases use GitHub Actions Trusted Publishing through the repository's release-plz.yml workflow and release environment.

Verification

Public tests cover independently encoded stored/DEFLATE/ZIP64/descriptors, short asynchronous reads, original identity, duplicates, negative census, actual native P-256/SHA-256 CMS/TSP/ERS, cancellation and resource rollback. Literal-only XML fixtures test owner contracts and are explicitly not a second XML parser or native XMLDSig qualification.

With Python installed, the opt-in independent ZIP/zlib interoperability path is:

cargo nextest run --locked -p structured-asic --features interop-tests --test zip

Licensed under Apache-2.0.