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Low 46 Bitcoin

chacha20_poly1305: bump version to 0.2.1

RB1657a23a View source ↗
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What the developer wrote

Authored by Nick Johnson

45/100 · Thin
chacha20_poly1305: bump version to 0.2.1
✓ Descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
The short version

What changed, and why it matters

This commit is a version bump for the chacha20-poly1305 sub-crate from 0.2.0 to 0.2.1. The changelog notes that the release fixes Poly1305 tag verification to use constant-time equality, which is a security-relevant change because non-constant-time comparison can leak information to an attacker. However, the actual code change is not present in this commit; it only updates version numbers, lock files, and changelog links. The lock-file changes also pull in an older bitcoin_hashes version (0.12.0) for a dependency, which is a routine dependency-resolution side effect and not a code change in this crate.

Recommended action

Review pull request #6125 to confirm the constant-time equality implementation is correct and comprehensive. If using chacha20-poly1305 0.2.0, upgrade to 0.2.1 or later. Verify that the lock-file dependency downgrade to bitcoin_hashes 0.12.0 does not introduce compatibility or security issues in downstream crates.

Security signals we found

01

Changelog describes a security-relevant fix: constant-time equality for Poly1305 tag verification

02

AEAD tag verification is a classic timing side-channel target

03

No source-code changes are present in the commit; fix is only referenced by changelog and PR number

04

Version bump and lock-file updates are the only mechanical changes visible

Risk score

Why this scored 46/100

Our methodology →
Potential impact 12/30
Exploitability 10/25
Stealth signal 8/15
Affected reach 7/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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