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check-crypto-usage

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Analyzes PHP code for cryptography issues. Detects weak algorithms, hardcoded keys, insecure random, poor key management, deprecated functions.

skills/check-crypto-usage/SKILL.md

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Aug 16, 2026
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MIT

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# Cryptography Security Check

Analyze PHP code for cryptographic vulnerabilities.

## Detection Patterns

### 1. Weak Hashing Algorithms

```php
// CRITICAL: Broken for passwords
$hash = md5($password);
$hash = sha1($password);
$hash = hash('sha256', $password);
$hash = crypt($password, '$1$salt$'); // MD5-based