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README.md

@suaveplan/cbor - RFC 8949 CBOR encoder/decoder + RFC 8742 sequences + RFC 9052 COSE bridge + RFC 8392 CWT + RFC 8610 CDDL — zero browser/Node deps

Summary

RFC 8949 (CBOR) encoder + decoder, RFC 8742 (CBOR Sequences), pull-style streaming decoder (AsyncIterable<Uint8Array> / ReadableStream<Uint8Array>), RFC 9052 §7 COSE_Key ↔ JWK round-trip + IANA algorithm bridge, deterministic-encoding shortcut, RFC 8949 §8 diagnostic notation, tag registry with IANA built-in handlers, and a strict §5.1 well-formedness predicate. Universal — runs unmodified in Bun, Node, Deno, and the browser. Zero browser/Node deps.

Wave 1 status. This package is the foundational codec layer. Larger capabilities authored in the design proposal — COSE structures (RFC 9052 §4–§6), CWT (RFC 8392), CDDL (RFC 8610), and the ChunkDecoder partial-item streaming surface — are scoped IN and queued as follow-up waves on top of this codec.

Documentation tree

  • ast — Typed AST shapes per RFC 8610 §3 — the contract between the parser and the validator (and any future code generator). E…
  • lexer — CDDL tokenizer per RFC 8610 §3 ABNF grammar. Reads a CDDL source string and emits a sequence of Token objects termina…
  • parser — CDDL parser per RFC 8610 §3 grammar. Consumes the token stream from the tokenize function and produces a typed AST (`…
  • validate — Walk a decoded CBOR value against a parsed CDDL schema and report the first mismatch (with a JSON-pointer-like path). T…
  • alg-map — Bridge between IANA COSE Algorithm identifiers (CoseAlg literal strings or the equivalent numeric labels from RFC 905…
  • cose-key — Decodes and encodes RFC 9052 §7 COSE_Key structures. The decoder maps an RFC-encoded CBOR map onto a typed discrimina…
  • encrypt — COSE_Encrypt (RFC 9052 §5.1) — multi-recipient AEAD-encrypted COSE message in CBOR tag 96. Each recipient holds its o…
  • encrypt0 — COSE_Encrypt0 (RFC 9052 §5.2) — single-recipient AEAD-encrypted COSE message in CBOR tag 16. Wraps AES-256-GCM and Ch…
  • headers — Typed CoseHeader map shape covering RFC 9052 §3.1 + IANA COSE Header Parameters (alg, crit, content type, kid, IV, Pa…
  • jwk — Round-trip converter between RFC 9052 COSE_Key instances and RFC 7517 JWK shapes. WebAuthn attestation flows often ne…
  • mac — COSE_Mac (RFC 9052 §6.1) — multi-recipient MAC message in CBOR tag 97. Each recipient gets a wrapped copy of the cont…
  • mac0 — COSE_Mac0 (RFC 9052 §6.2) — single-recipient MAC message in CBOR tag 17. Used for symmetric-key authentication of CWT…
  • sig-structure — Builders for the canonical input to COSE signature, MAC, and AEAD computations per RFC 9052 §4.4 / §6.3 / §5.3. Every s…
  • sign — COSE_Sign (RFC 9052 §4.1) — multi-signer COSE message in CBOR tag 98. Use when a payload needs to be co-signed by mul…
  • sign1 — COSE_Sign1 (RFC 9052 §4.2) — single-signer COSE message in CBOR tag 18. WebAuthn attestation, COSE-signed firmware, a…
  • claims — Encode and decode RFC 8392 CBOR Web Token claim sets. The seven IANA- registered claims (iss, sub, aud, exp, `n…
  • verify — End-to-end CWT verification: parse the COSE wrapper, verify the signature or MAC, decode the claim set, and check the s…
  • decoder — (no submodules) - half-float — Decodes 2 big-endian bytes representin…
    • decoder — (no submodules) - half-float — Decodes 2 big-endian bytes representin…
    • half-float — Decodes 2 big-endian bytes representing IEEE 754 binary16 to a JavaScript number. The decoder is always available — n…
    • well-formed — isWellFormed(bytes) returns true iff bytes represent a single well-formed CBOR item per RFC 8949 §5.1. The functi…
  • deterministic — (no submodules)
  • diagnostic — (no submodules)
  • encoder — (no submodules) - half-float — Encodes a JavaScript number as IEEE……
    • encoder — (no submodules) - half-float — Encodes a JavaScript number as IEEE……
    • half-float — Encodes a JavaScript number as IEEE 754 binary16 (CBOR major 7 / value 25) when the round-trip is exact, and otherwis…
  • errors — (no submodules)
  • sequences — (no submodules)
  • chunk-decoder — Partial-item streaming decoder. While PullDecoder yields one whole CBOR item at a time (waiting until each item is fu…
  • pull-decoder — PullDecoder is a pull-style streaming decoder over an AsyncIterable<Uint8Array> or ReadableStream<Uint8Array>. Ea…
  • builtin — Provides defaultTagHandlers(), a TagRegistry populated with handlers for the most-used IANA-registered CBOR tags. C…
  • registry — TagRegistry is the in-memory mutable container for CBOR tag handlers. The decoder consults a snapshot of the registry…
  • tagged — Provides the Tagged<T> value object used by @suaveplan/cbor to materialise RFC 8949 §3.4 tagged items. The decoder…
- half-float — Decodes 2 big-endian bytes representin…

  • decoder — (no submodules)- half-float — Decodes 2 big-endian bytes representin…

  • half-float — Decodes 2 big-endian bytes representing IEEE 754 binary16 to a JavaScript number. The decoder is always available — n…

  • well-formed — isWellFormed(bytes) returns true iff bytes represent a single well-formed CBOR item per RFC 8949 §5.1. The functi…

  • deterministic — (no submodules)- deterministic — (no submodules)- diagnostic — (no submodules)- diagnostic — (no submodules)- encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE……

    • encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE……
    • half-float — Encodes a JavaScript number as IEEE 754 binary16 (CBOR major 7 / value 25) when the round-trip is exact, and otherwis…

  • errors — (no submodules)- error-codes — (no submodules)- sequences — (no submodules)- sequences — (no submodules)- chunk-decoder — Partial-item streaming decoder. While PullDecoder yields one whole CBOR item at a time (waiting until each item is fu…

  • pull-decoder — PullDecoder is a pull-style streaming decoder over an AsyncIterable<Uint8Array> or ReadableStream<Uint8Array>. Ea…

  • builtin — Provides defaultTagHandlers(), a TagRegistry populated with handlers for the most-used IANA-registered CBOR tags. C…

  • registry — TagRegistry is the in-memory mutable container for CBOR tag handlers. The decoder consults a snapshot of the registry…

  • tagged — Provides the Tagged<T> value object used by @suaveplan/cbor to materialise RFC 8949 §3.4 tagged items. The decoder…

  • half-float — Decodes 2 big-endian bytes representin…

  • decoder — (no submodules)- half-float — Decodes 2 big-endian bytes representin…

  • half-float — Decodes 2 big-endian bytes representing IEEE 754 binary16 to a JavaScript number. The decoder is always available — n…

  • well-formed — isWellFormed(bytes) returns true iff bytes represent a single well-formed CBOR item per RFC 8949 §5.1. The functi…

  • deterministic — (no submodules)- deterministic — (no submodules)- diagnostic — (no submodules)- diagnostic — (no submodules)- encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE……

    • encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE……
    • half-float — Encodes a JavaScript number as IEEE 754 binary16 (CBOR major 7 / value 25) when the round-trip is exact, and otherwis…

  • errors — (no submodules)- error-codes — (no submodules)- sequences — (no submodules)- sequences — (no submodules)- chunk-decoder — Partial-item streaming decoder. While PullDecoder yields one whole CBOR item at a time (waiting until each item is fu…

  • pull-decoder — PullDecoder is a pull-style streaming decoder over an AsyncIterable<Uint8Array> or ReadableStream<Uint8Array>. Ea…

  • builtin — Provides defaultTagHandlers(), a TagRegistry populated with handlers for the most-used IANA-registered CBOR tags. C…

  • registry — TagRegistry is the in-memory mutable container for CBOR tag handlers. The decoder consults a snapshot of the registry…

  • tagged — Provides the Tagged<T> value object used by @suaveplan/cbor to materialise RFC 8949 §3.4 tagged items. The decoder…

  • half-float — Decodes 2 big-endian bytes representin…

  • decoder — (no submodules)- half-float — Decodes 2 big-endian bytes representin…

  • half-float — Decodes 2 big-endian bytes representing IEEE 754 binary16 to a JavaScript number. The decoder is always available — n…

  • well-formed — isWellFormed(bytes) returns true iff bytes represent a single well-formed CBOR item per RFC 8949 §5.1. The functi…

  • deterministic — (no submodules)- deterministic — (no submodules)- diagnostic — (no submodules)- diagnostic — (no submodules)- encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE…

    • encoder — (no submodules)- half-float — Encodes a JavaScript number as IEEE…
    • half-float — Encodes a JavaScript number as IEEE 754 binary16 (CBOR major 7 / value 25) when the round-trip is exact, and otherwis…

  • errors — (no submodules)- error-codes — (no submodules)- sequences — (no submodules)- sequences — (no submodules)- chunk-decoder — Partial-item streaming decoder. While PullDecoder yields one whole CBOR item at a time (waiting until each item is fu…

  • pull-decoder — PullDecoder is a pull-style streaming decoder over an AsyncIterable<Uint8Array> or ReadableStream<Uint8Array>. Ea…

  • builtin — Provides defaultTagHandlers(), a TagRegistry populated with handlers for the most-used IANA-registered CBOR tags. C…

  • registry — TagRegistry is the in-memory mutable container for CBOR tag handlers. The decoder consults a snapshot of the registry…

  • tagged — Provides the Tagged<T> value object used by @suaveplan/cbor to materialise RFC 8949 §3.4 tagged items. The decoder…

  • decoder — (no submodules)- half-float — Decodes 2 big-endian bytes representing IEEE 754 binary16 to a JavaScript number. The decoder is always available — n…

  • well-formed — isWellFormed(bytes) returns true iff bytes represent a single well-formed CBOR item per RFC 8949 §5.1. The functi…

  • deterministic — (no submodules) - deterministic — (no submodules)- diagnostic — (no submodules) - diagnostic — (no submodules)- encoder — (no submodules) - encoder — (no submodules) - half-float — Encodes a JavaScript number as IEEE 754 binary16 (CBOR major 7 / value 25) when the round-trip is exact, and otherwis…

  • errors — (no submodules) - error-codes — (no submodules)- sequences — (no submodules) - sequences — (no submodules)- chunk-decoder — Partial-item streaming decoder. While PullDecoder yields one whole CBOR item at a time (waiting until each item is fu…

  • pull-decoder — PullDecoder is a pull-style streaming decoder over an AsyncIterable<Uint8Array> or ReadableStream<Uint8Array>. Ea…

  • builtin — Provides defaultTagHandlers(), a TagRegistry populated with handlers for the most-used IANA-registered CBOR tags. C…

  • registry — TagRegistry is the in-memory mutable container for CBOR tag handlers. The decoder consults a snapshot of the registry…

  • tagged — Provides the Tagged<T> value object used by @suaveplan/cbor to materialise RFC 8949 §3.4 tagged items. The decoder…

Install

bun add @suaveplan/cbor

Quick Start

import { encode, decode } from "@suaveplan/cbor";

const bytes = encode({ a: 1, b: [true, "two"] });
const value = decode(bytes);

Modules

Module Doc
encoder src/encoder/encoder.md
encoder/half-float src/encoder/half-float.md
decoder src/decoder/decoder.md
decoder/half-float src/decoder/half-float.md
decoder/well-formed src/decoder/well-formed.md
streaming/pull-decoder src/streaming/pull-decoder.md
deterministic src/deterministic/deterministic.md
diagnostic src/diagnostic/diagnostic.md
cose/cose-key src/cose/cose-key.md
cose/jwk src/cose/jwk.md
cose/alg-map src/cose/alg-map.md
cose/headers src/cose/headers.md
cose/sig-structure src/cose/sig-structure.md
cose/sign1 src/cose/sign1.md
cose/mac0 src/cose/mac0.md
cwt/claims src/cwt/claims.md
cwt/verify src/cwt/verify.md
streaming/chunk-decoder src/streaming/chunk-decoder.md
cose/sign src/cose/sign.md
cose/mac src/cose/mac.md
cose/encrypt0 src/cose/encrypt0.md
cose/encrypt src/cose/encrypt.md
tags/registry src/tags/registry.md
tags/tagged src/tags/tagged.md
tags/builtin src/tags/builtin.md
sequences src/sequences/sequences.md
errors src/errors/error-codes.md

Subpath exports

  • @suaveplan/cbor — root barrel: encode, decode, Tagged, error codes
  • @suaveplan/cbor/encoder — encoder + half-float
  • @suaveplan/cbor/decoder — decoder + half-float + isWellFormed
  • @suaveplan/cbor/streaming — PullDecoder over async-iterable / WHATWG streams
  • @suaveplan/cbor/sequences — RFC 8742
  • @suaveplan/cbor/deterministic — encodeDeterministic shortcut for §4.2
  • @suaveplan/cbor/diagnostic — RFC 8949 §8 notation emitter
  • @suaveplan/cbor/cose — COSE_Key ↔ JWK + IANA algorithm bridge (RFC 9052 §7), Sig_structure builders (§4.4 / §6.3 / §5.3), COSE_Sign1 encode/decode/verify (§4.2, ES256/EdDSA), COSE_Mac0 create/encode/decode/verify (§6.2, HS256/384/512)
  • @suaveplan/cbor/cwt — RFC 8392 CBOR Web Token claim encode/decode + verifyCwtSign1 / verifyCwtMac0 with time-window + audience + issuer validation
  • @suaveplan/cbor/cddl — RFC 8610 CDDL lexer + parser + AST + validator (primitive prelude, ranges, choices, arrays, maps, occurrence indicators, .size/.regexp/.cbor control operators, generics, named references)
  • @suaveplan/cbor/tags — Tagged, TagRegistry, defaultTagHandlers
  • @suaveplan/cbor/errors — CBOR_CODES, CborError, CborErrorCode

Conformance

  • RFC 8949 §3.1 — major types 0–7 encode + decode
  • RFC 8949 §3.2 — indefinite-length text/byte strings, arrays, maps (decoder)
  • RFC 8949 §3.3 — IEEE 754 binary16 encode (opt-in) + decode (always-on)
  • RFC 8949 §3.4 — tagged-item registry
  • RFC 8949 §4.1 — preferred serialization (shortest-form integers always-on, shortest-exact float widths)
  • RFC 8949 §4.2 — deterministic-encoding profile (sorted map keys, no indefinite-length, half-float disabled in deterministic mode)
  • RFC 8949 §5.1 — strict-mode well-formedness; every malformed-input class raises CborError(MALFORMED)
  • RFC 8742 §2 + §3 — CBOR Sequences encode + decode + async-iterator stream
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