lib/src/framing.dart ports ParsePrelude, Prelude.Bytes, PayloadOffset and
HeaderBinding of package capsule and the frame of Decode of package
accesskey of datekeys-go at c531e93, with their checks in the order of
spec §23 and §40 and their texts, and splitCapsule and FramingException,
the steps 1 to 3 of capsule.Inspect, as framing.ts of datekeys-ts. The
format of a capsule is the enum CapsuleFormat.
lib/src/padding.dart is padding.go: PaddedLength and PayloadAgeLength for
the codes of PaddingRule, exact up to L_MAX on the web too, where an int is
a double: bitlen doubles a power of two and the roundings divide and
multiply by powers of two, with no shift or mask of more than 31 bits. And
PaddingCheck, the checkPadding of capsule.Open at step 17, fed the
plaintext piece by piece.
lib/src/body.dart is the frame of BODY of format3.go (ParseBodyFrame,
CheckArea, ContentLength), and lib/src/digest.dart the incremental SHA-256
of a capsule_digest, with the comparison of checkCapsuleDigest. The errors
that Go returns without a normative code are ArgumentErrors with its text.
The tests run on the VM and compiled to JavaScript: the order of the
checks on capsules built in memory, P against a statement of spec §29.1 in
BigInt, next to 2^53 and at the boundaries of 32 bits, and the digest
against package:crypto however the file is cut.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
