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

{
  "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

{
  "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

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