node /path/to/skills/crypto/scripts/random.js --bytes 32 --encoding hex

Scripts

Cryptographic hashing with multiple algorithms.

Usage:

node hash.js <data> [OPTIONS]

Options:

--algorithm <alg> - Hash algorithm: sha256, sha384, sha512, sha3-256 (default: sha256)
--encoding <enc> - Output encoding: hex, base64, base64url (default: hex)
--file - Treat input as file path
--hmac <key> - Generate HMAC with key

Symmetric encryption using AES-256-GCM.

Usage:

node encrypt.js <data> --password <password>
node encrypt.js <data> --key <hex_key>

Options:

Decrypt AES-256-GCM encrypted data.

Usage:

node decrypt.js <encrypted> --password <password>
node decrypt.js --file <path> --key <hex_key>

Cryptographically secure random data generation.

Usage:

node random.js [OPTIONS]

Options:

Generate cryptographic keys and key pairs.

Usage:

node keygen.js <type> [OPTIONS]

Types:

Digital signatures with RSA or ECDSA.

Usage:

node sign.js <data> --key <private_key_file>
node sign.js --verify <signature> --key <public_key_file> <data>

Examples

node hash.js important-document.pdf --file --algorithm sha256

node encrypt.js '{"api_key":"sk-..."}' --password "strong-password-here"

node random.js --bytes 24 --encoding base64url

node random.js --bytes 64 --encoding base64

node keygen.js ecdsa --curve P-256 --output keys/

node hash.js "message" --hmac "shared-secret" --algorithm sha256

{
  "algorithm": "sha256",
  "hash": "a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e",
  "encoding": "hex"
}

{
  "algorithm": "aes-256-gcm",
  "iv": "base64_iv",
  "salt": "base64_salt",
  "tag": "base64_tag",
  "ciphertext": "base64_encrypted_data"
}

{
  "type": "ecdsa",
  "curve": "P-256",
  "publicKey": "-----BEGIN PUBLIC KEY-----...",
  "privateKey": "-----BEGIN PRIVATE KEY-----..."
}