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performing-cryptographic-audit-of-application

performing-cryptographic-audit-of-application

github.com/mukul975Security35.2k122 installsUpdated 8w ago
Repository

About performing-cryptographic-audit-of-application

A skill for reviewing application cryptography through automated scans of Python code and configuration files. It targets security teams and auditors checking algorithms, secrets, TLS settings, and key handling, with structured findings and remediation as goals.

Key features

  1. 01Detect deprecated cryptographic algorithms
  2. 02Flag insecure cipher modes and padding
  3. 03Find hardcoded keys and passwords
  4. 04Review TLS and KDF settings
  5. 05Check randomness and report findings

Use cases

  1. 01Audit Python applications and configurations
  2. 02Validate cryptographic controls in a test environment
  3. 03Prepare findings with severity and remediation

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/mukul975/anthropic-cybersecurity-skills --skill performing-cryptographic-audit-of-application

After installing, type/performing-cryptographic-audit-of-applicationin Claude Code to confirm it loaded.

Bundled files

References and scripts installed along with SKILL.md.

LICENSE
assets/
template.md
references/
api-reference.md
standards.md
workflows.md
scripts/
agent.py
process.py

Details

From the project README

Performing Cryptographic Audit of Application

Overview

A cryptographic audit systematically reviews an application's use of cryptographic primitives, protocols, and key management to identify vulnerabilities such as weak algorithms, insecure modes, hardcoded keys, insufficient entropy, and protocol misconfigurations. This skill covers building an automated crypto audit tool that scans Python and configuration files for common cryptographic weaknesses.

When to Use

  • When conducting security assessments that involve performing cryptographic audit of application
  • When following incident response procedures for related security events
  • When performing scheduled security testing or auditing activities
  • When validating security controls through hands-on testing

Prerequisites

  • Familiarity with cryptography concepts and tools
  • Access to a test or lab environment for safe execution
  • Python 3.8+ with required dependencies installed
  • Appropriate authorization for any testing activities

Objectives

  • Detect usage of deprecated algorithms (MD5, SHA-1, DES, RC4)
  • Identify insecure cipher modes (ECB) and padding schemes
  • Find hardcoded keys, passwords, and secrets in source code
  • Verify TLS/SSL configuration strength
  • Check key derivation function parameters
  • Validate random number generator usage
  • Produce a structured audit report with findings and remediation

Key Concepts

Cryptographic Weakness Categories
CategoryExamplesRisk Level
Weak HashingMD5, SHA-1 for integrity/signaturesHigh
Insecure EncryptionDES, 3DES, RC4, BlowfishHigh
Bad Cipher ModeECB mode for any block cipherHigh
Insufficient Key SizeRSA < 2048, AES-128 for long-termMedium
Hardcoded SecretsKeys/passwords in source codeCritical
Weak KDFLow iteration PBKDF2, plain MD5High
Poor Entropytime-based seeds, predictable IVsHigh
Deprecated ProtocolsSSLv3, TLS 1.0, TLS 1.1High

Security Considerations

  • Review both application code and configuration files
  • Check third-party dependencies for known crypto vulnerabilities
  • Verify certificates and TLS configurations on deployed servers
  • Ensure secrets are loaded from environment variables or vaults
  • Review key storage and rotation practices

Validation Criteria

  • Scanner detects all injected test weaknesses
  • MD5/SHA-1 usage for security purposes is flagged
  • ECB mode usage is flagged
  • Hardcoded keys/passwords are detected
  • Weak KDF parameters are identified
  • Report includes severity, location, and remediation
  • False positive rate is below 10%

Comments

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