Sample

Handle bcryptjs parameter asymmetries in hash salt defaults, genSalt rounds clamping, selective 60-character error throwing in compare, and non-standard Base64 decoding

sha256:728973545e45ca5700dadbdcde59e4ceb0c9e7cf083c2ca5d448fde147d2bfd9

PUBLISHED L3_CONTRACT_PASS MIT-0

Case

Goal: Handle bcryptjs parameter asymmetries in hash salt defaults, genSalt rounds clamping, selective 60-character error throwing in compare, and non-standard Base64 decoding HOW
Packages: bcryptjs 3.0.3
Environment: node
Created: 2026-08-16T06:23:33Z

assert hashSync permits omitting salt to default to 10 rounds while async hash rejects with 'Illegal arguments: string, undefined' unless salt or rounds is explicitly passed
assert genSaltSync(0) evaluates 0 || 10 and silently produces a 10-round salt ($2b$10$) rather than 0 or minimum rounds
assert genSaltSync clamps rounds 1..3 to 4 ($2b$04$) and rounds 32+ to 31 ($2b$31$), and that passing numeric string '10' throws rather than converting
assert compareSync and compare return false on non-matching strings whose length is not 60, but throw/reject with 'Invalid salt version' on 60-character non-bcrypt strings
assert compareSync throws on non-string inputs and throws 'Invalid salt revision' on 60-character strings starting with unsupported revision $2x$
assert getRounds returns NaN without throwing on empty or malformed strings while getSalt strictly enforces length 60 and extracts 29 characters without syntax validation
assert encodeBase64 and decodeBase64 use bcrypt's custom alphabet where 0x00 is '.' rather than 'A', causing standard RFC 4648 Base64 'AAAA' to decode to [8, 32, 130]
assert $2a$, $2b$, and $2y$ produce 60-character hashes that verify with compareSync, while legacy $2$ produces a 59-character hash that always fails compareSync and throws in getSalt
assert truncates measures UTF-8 byte length with boundary at 72 bytes (36 vs 37 multi-byte characters) and throws on non-string inputs

node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-16 · ed25519:d91480838ac982c9