Faults injected one at a time found four that the vectors let through:
R2 at 32 segments, R3 counting code points instead of UTF-16 code units
in an astral NFD, U+036F kept by normalizeWords, and DEL let through by
checkWords. The generators now write both sides of each limit: 32 and 33
segments, 255 and 256 bytes in letters of two and four bytes, 255 and 256
UTF-16 code units of NFD and 252 and 258 from astral decompositions,
bases of 8 and 9 runes, extensions of 3 and 4 also astral, the first and
the last mark of U+0300 to U+036F and their neighbours, and U+001F,
U+007E, U+007F, U+0080 and U+00A0 in a word. All four faults are caught
now.
wordKeyPassword is the password P of spec §38.1, as wordKeySalt is S, and
wordKey uses both: the tests compiled to JavaScript check P against the
one of Go, so that a wrong separator of the words is caught there too,
not only by the keys of 600 000 iterations on the VM.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
lib/src/wordkey.dart ports package wordkey of datekeys-go at c531e93:
normalizeWords is wordkey.Normalize (the NFD of pathrule.dart, without
U+0300 to U+036F, the simple lowercase of Unicode 18.0.0, split at the
white space of §38.1), checkWords is wordkey.Check with its texts,
wordKey is wordkey.Key (PBKDF2-HMAC-SHA256 of sha256.dart, 600 000
iterations, with the salt of §38.1) and wordIdentity is wordkey.Identity,
an X25519Identity of age.dart. As in pathrule.dart, the functions whose
name ends in Utf8 take the bytes of a Go string, and a String is taken as
utf8Bytes writes it.
tool/wordkey_go_vectors.go runs in the module context of datekeys-go and
writes test/vectors/wordkey_vectors.json and its Dart copy: 400 texts and
their words, 513 lists of words and the result of Check, and four keys
with their salt, the PBKDF2 of 1000 iterations for Node.js and the
recipient, the vector of §38.1 first. The keys of 600 000 iterations run
on the VM only.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
