Agent skill

crypto-analyzer

Cryptographic implementation analysis and validation for encryption algorithms, key sizes, and certificate management

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/a5c-ai/babysitter/tree/main/library/specializations/security-compliance/skills/crypto-analyzer

SKILL.md

Crypto Analyzer Skill

Purpose

Analyze and validate cryptographic implementations to ensure proper algorithm usage, key sizes, certificate validity, and compliance with cryptographic best practices and standards.

Capabilities

Encryption Implementation Analysis

  • Analyze symmetric encryption usage (AES, ChaCha20)
  • Review asymmetric encryption implementations (RSA, ECDSA)
  • Check encryption mode selection (GCM, CBC, CTR)
  • Validate initialization vector (IV) handling
  • Verify padding schemes
  • Identify insecure encryption patterns

Algorithm Strength Validation

  • Check algorithm deprecation status
  • Validate against NIST recommendations
  • Compare with FIPS 140-3 requirements
  • Assess quantum resistance readiness
  • Flag weak or deprecated algorithms
  • Recommend algorithm upgrades

Key Size Verification

  • Validate RSA key lengths (minimum 2048-bit)
  • Check ECC curve selections
  • Verify symmetric key sizes
  • Assess key derivation functions
  • Check PBKDF2/scrypt/bcrypt parameters
  • Validate key stretching implementations

Deprecated Algorithm Detection

  • Identify MD5 and SHA-1 usage
  • Flag DES and 3DES usage
  • Detect RC4 stream cipher
  • Find weak random number generation
  • Identify export-grade cryptography
  • Flag custom/homegrown crypto

Certificate Analysis

  • Verify certificate validity periods
  • Check certificate chain completeness
  • Validate certificate key usage
  • Detect wildcard certificate risks
  • Check certificate transparency logs
  • Monitor certificate expiration

Cryptographic Recommendations

  • Suggest algorithm replacements
  • Recommend key size upgrades
  • Provide implementation guidance
  • Map to compliance requirements
  • Generate migration plans
  • Prioritize remediation efforts

Algorithm Assessment

Symmetric Encryption

Algorithm Status Recommendation
AES-256-GCM Approved Preferred
AES-128-GCM Approved Acceptable
ChaCha20-Poly1305 Approved Preferred for mobile
AES-CBC Caution Use with HMAC
3DES Deprecated Replace immediately
DES Prohibited Critical risk

Asymmetric Encryption

Algorithm Min Key Size Recommendation
RSA 2048-bit 3072+ preferred
ECDSA P-256 P-384 preferred
Ed25519 N/A Recommended

Hash Functions

Algorithm Status Use Case
SHA-256/384/512 Approved General use
SHA-3 Approved High security
BLAKE2 Approved Performance
SHA-1 Deprecated Legacy only
MD5 Prohibited Never use

Integrations

  • OpenSSL: Cryptographic library analysis
  • testssl.sh: TLS configuration testing
  • SSL Labs API: Certificate and TLS analysis
  • Cryptographic libraries: Language-specific crypto review
  • HSM interfaces: Hardware security module validation

Target Processes

  • Cryptography and Key Management Process
  • Security Code Review
  • TLS Configuration Hardening
  • Certificate Lifecycle Management

Input Schema

json
{
  "type": "object",
  "properties": {
    "analysisType": {
      "type": "string",
      "enum": ["code-review", "tls-config", "certificate", "implementation", "compliance"],
      "description": "Type of cryptographic analysis"
    },
    "targetPath": {
      "type": "string",
      "description": "Path to code or configuration to analyze"
    },
    "endpoints": {
      "type": "array",
      "items": { "type": "string" },
      "description": "TLS endpoints to analyze"
    },
    "certificates": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Certificate files or URLs to analyze"
    },
    "languages": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Programming languages to analyze"
    },
    "complianceFrameworks": {
      "type": "array",
      "items": {
        "type": "string",
        "enum": ["NIST", "FIPS-140-3", "PCI-DSS", "HIPAA", "FedRAMP"]
      }
    },
    "includeQuantumAssessment": {
      "type": "boolean",
      "description": "Include post-quantum readiness assessment"
    }
  },
  "required": ["analysisType"]
}

Output Schema

json
{
  "type": "object",
  "properties": {
    "analysisId": {
      "type": "string"
    },
    "analysisType": {
      "type": "string"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time"
    },
    "summary": {
      "type": "object",
      "properties": {
        "totalFindings": { "type": "integer" },
        "critical": { "type": "integer" },
        "high": { "type": "integer" },
        "medium": { "type": "integer" },
        "low": { "type": "integer" }
      }
    },
    "algorithmFindings": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "algorithm": { "type": "string" },
          "usage": { "type": "string" },
          "status": { "type": "string", "enum": ["approved", "caution", "deprecated", "prohibited"] },
          "location": { "type": "string" },
          "recommendation": { "type": "string" }
        }
      }
    },
    "keySizeFindings": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "algorithm": { "type": "string" },
          "currentSize": { "type": "string" },
          "minimumRequired": { "type": "string" },
          "recommendation": { "type": "string" }
        }
      }
    },
    "certificateFindings": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "subject": { "type": "string" },
          "issuer": { "type": "string" },
          "validFrom": { "type": "string" },
          "validTo": { "type": "string" },
          "keySize": { "type": "string" },
          "issues": { "type": "array" }
        }
      }
    },
    "tlsFindings": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "endpoint": { "type": "string" },
          "protocols": { "type": "array" },
          "cipherSuites": { "type": "array" },
          "grade": { "type": "string" },
          "issues": { "type": "array" }
        }
      }
    },
    "complianceStatus": {
      "type": "object"
    },
    "quantumReadiness": {
      "type": "object",
      "properties": {
        "atRiskAlgorithms": { "type": "array" },
        "migrationPriority": { "type": "string" },
        "recommendations": { "type": "array" }
      }
    },
    "remediationPlan": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "finding": { "type": "string" },
          "action": { "type": "string" },
          "priority": { "type": "string" },
          "effort": { "type": "string" }
        }
      }
    }
  }
}

Usage Example

javascript
skill: {
  name: 'crypto-analyzer',
  context: {
    analysisType: 'code-review',
    targetPath: './src',
    languages: ['Java', 'Python'],
    complianceFrameworks: ['NIST', 'PCI-DSS'],
    includeQuantumAssessment: true
  }
}

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