Lib.rs

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0.3.0 — diff review from 0.2.6 only (current) safe-to-deploy

From zcash/rust-ecosystem copy of zcash/zcash. By str4d.

Replaces some unsafe code by bumping MSRV to 1.66 (to access core::hint::black_box).

0.3.0 (current) ub-risk-1, does-not-implement-crypto

From google/supply-chain copy of google/rust-crate-audits. By Benjamin Saunders.

Reviewed in CL 587904821

0.3.0 (current) unknown

From kornelski/crev-proofs copy of git.savannah.gnu.org.

Packaged for Guix (crates-io)

The current version of constant_time_eq is 0.3.0.

0.2.4 (older version) safe-to-deploy

From bytecodealliance/wasmtime. By Nick Fitzgerald.

A few tiny blocks of unsafe but each of them is very obviously correct.

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safe-to-deploy (implies safe-to-run)

This crate will not introduce a serious security vulnerability to production software exposed to untrusted input. More…

safe-to-run

Implied by other criteria

This crate can be compiled, run, and tested on a local workstation or in controlled automation without surprising consequences. More…

crypto-reviewed

The cryptographic code in this crate has been reviewed for correctness by a member of a designated set of cryptography experts within the project.

ub-risk-1 (implies ub-risk-2)

Excellent soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-1

ub-risk-2 (implies ub-risk-3)

Implied by other criteria

Negligible unsoundness or average soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-2

ub-risk-3 (implies ub-risk-4)

Implied by other criteria

Mild unsoundness or suboptimal soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-3

ub-risk-4

Implied by other criteria

Extreme unsoundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-4

does-not-implement-crypto (implies crypto-safe)

Inspection reveals that the crate in question does not attempt to implement any cryptographic algorithms on its own.

Note that certification of this does not require an expert on all forms of cryptography: it's expected for crates we import to be "good enough" citizens, so they'll at least be forthcoming if they try to implement something cryptographic. When in doubt, please ask an expert.

crypto-safe

Implied by other criteria

All crypto algorithms in this crate have been reviewed by a relevant expert.

Note: If a crate does not implement crypto, use does-not-implement-crypto, which implies crypto-safe, but does not require expert review in order to audit for.

unknown

May have been packaged automatically without a review

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The current version of constant_time_eq is 0.3.0.

0.1.5 (older version) Rating: Strong Positive Thoroughness: Medium Understanding: High

by Minoru on 2020-05-13

I compared this to crypto/memneq.c from Linux 5.7-rc5; the algorithm is indeed the same, and I understand how it works. There are comments for all the unobvious bits, too. I am not formally trained in cryptography, but I posses basic knowledge and I believe this code to be secure for any application.

0.1.4 (older version) Rating: Positive Thoroughness: Medium Understanding: Medium

by git.sr.ht/~icefox on 2019-09-19

Tiny, safe, well-documented.

0.1.3 (older version) Rating: Positive Thoroughness: Medium Understanding: High

Approved without comment by dpc on 2019-01-27