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Module for calculating Cyclic Redundancy Check (CRC) for Node.js and the browser.

30
Versions
MIT
License
No
Install Scripts
Missing
Provenance

Supply chain provenance

Status for the latest visible version.

No SLSA provenance npm registry signatures gitHead linked

Without SLSA provenance there is no cryptographic link between this tarball and the public source — the axios compromise (March 2026) relied on exactly this gap.

Maintainers

alexgorbatchev

Keywords

crccrc16ccittcrc16kermitcrc16modbuscrc16crc16xmodemcrc1crc24crc32crc81wirecrc8crc8dvbs2crcjam

Accepted risks

Findings the reviewer chose to accept rather than block on.

SourceRuleReasonAccepted byWhen
source-diff source-size-dropped AI (source-diff): Size drop reflects legitimate refactoring to CoffeeScript-compiled sources, not a stub replacement. Consistent with package history. ai
source-diff obfuscated-file:lib/crc32.js AI (source-diff): File is CoffeeScript-compiled output (header confirms this); long line is a standard CRC32 lookup table, not obfuscation. Pattern is stable for this package. ai
publish-pattern new-deps-added AI (publish-pattern): The 'buffer' dep is the standard feross/buffer browser polyfill, appropriate for a CRC library targeting both Node.js and browsers. ai
source-diff obfuscated-file:lib/es6/crcjam.js AI (source-diff): Long lines are pre-computed CRC lookup tables generated by pycrc.py, not obfuscation. This is standard CRC implementation practice and stable for this package. ai
source-diff obfuscated-file:lib/es6/crc32.js AI (source-diff): Long lines are pre-computed CRC lookup tables generated by pycrc.py, not obfuscation. This is standard CRC implementation practice and stable for this package. ai
source-diff obfuscated-file:lib/crcjam.js AI (source-diff): Long line is a precomputed CRC-JAM polynomial lookup table generated by pycrc.py — standard pattern for CRC implementations, not obfuscation. ai
provenance no-provenance AI (provenance): Established package from trusted publisher; lack of Sigstore attestation is a best-practice gap, not a security risk for this package. ai
provenance missing-githead AI (provenance): Package restructured to ship dual ESM/CJS builds; publish environment change explains missing gitHead. Trusted publisher with strong track record. ai
source-diff obfuscated-file:lib/es6/calculators/crcjam.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff source-size-tripled AI (source-diff): Size increase explained by addition of 87 new source files covering multiple CRC algorithm variants — legitimate package expansion, not injected payloads. ai
source-diff obfuscated-file:lib/es6/calculators/crc8.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc16.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc16ccitt.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc16kermit.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc16modbus.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc24.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc32.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff obfuscated-file:lib/es6/calculators/crc81wire.js AI (source-diff): Long lines are pre-computed CRC lookup tables (hex arrays), not obfuscated code. Standard table-driven CRC implementation pattern for this package. ai
source-diff large-new-source-files AI (source-diff): 128 new files explained by dual ESM/CJS build output with per-calculator exports, as confirmed by the exports map in package.json. ai
typosquat typosquat.levenshtein:cors AI (typosquat): crc is a legitimate, established CRC calculation library; it is not a typosquat of cors — they are entirely different packages with different purposes. ai

Versions (showing 30 of 30)

Version Deps Published
4.3.2 0 / 0
4.3.1 0 / 0
4.3.0 0 / 0
4.2.0 0 / 0
4.1.1 0 / 0
4.1.0 0 / 0
4.0.0 0 / 22
3.8.0 1 / 17
3.7.0 1 / 17
3.6.0 1 / 17
3.5.0 0 / 9
3.4.4 0 / 9
3.4.3 0 / 9
3.4.2 0 / 9
3.4.1 0 / 9
3.4.0 0 / 8
3.3.0 0 / 8
3.2.1 0 / 8
3.2.0 0 / 8
3.1.0 0 / 8
3.0.0 0 / 8
2.1.1 0 / 5
2.1.0 0 / 5
2.0.0 0 / 5
1.1.0 0 / 5
1.0.0 0 / 5
0.3.0 0 / 2
0.2.1 0 / 2
0.2.0 0 / 2
0.1.0 0 / 0

v4.3.1

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v4.3.0

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v4.2.0

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v4.1.1

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v4.1.0

2 findings
HIGH Missing gitHead — previous versions had it provenance

This version has no gitHead field linking it to a source commit, but previous versions did. This suggests the publish environment changed. Published by: alexgorbatchev.

LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v4.0.0

10 findings
HIGH New obfuscated file: lib/es6/calculators/crc16.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc16ccitt.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc16kermit.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc16modbus.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc24.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc8.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crc81wire.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/calculators/crcjam.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.8.0

3 findings
HIGH New obfuscated file: lib/es6/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/crcjam.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.7.0

3 findings
HIGH New obfuscated file: lib/es6/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/crcjam.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.6.0

3 findings
HIGH New obfuscated file: lib/es6/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

HIGH New obfuscated file: lib/es6/crcjam.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.5.0

2 findings
HIGH New obfuscated file: lib/crcjam.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.4.4

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.4.3

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.4.2

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v3.4.1

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.4.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.3.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.2.1

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.2.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.1.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v3.0.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v2.1.1

2 findings
HIGH New obfuscated file: lib/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v2.1.0

2 findings
HIGH New obfuscated file: lib/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v2.0.0

2 findings
HIGH New obfuscated file: lib/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v1.1.0

2 findings
HIGH New obfuscated file: lib/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v1.0.0

2 findings
HIGH New obfuscated file: lib/crc32.js source-diff

Newly added source file contains lines over 3000 chars, suggesting minified or obfuscated code. New obfuscated files are a strong attack indicator.

INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v0.3.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v0.2.1

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v0.2.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.

v0.1.0

1 finding
INFO No provenance attestation provenance

[Accepted risk] Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.