Optional custom implementations for crypto operations
CryptoRuntime instance with crypto operations
// Use default global crypto
const crypto = toCryptoRuntime();
const hash = await crypto.digestSHA256(new Uint8Array([1, 2, 3]));
const randomData = crypto.randomBytes(16);
// Override for testing
const mockCrypto = toCryptoRuntime({
randomBytes: (size) => new Uint8Array(size).fill(42),
digestSHA256: async (data) => new ArrayBuffer(32)
});
// Encrypt/decrypt with AES-GCM
const key = await crypto.importKey(
'raw',
new Uint8Array(32),
{ name: 'AES-GCM' },
false,
['encrypt', 'decrypt']
);
Creates a CryptoRuntime abstraction with optional custom implementations.
Provides a unified crypto interface that works across different JavaScript runtimes (browsers, Node.js, Deno, CF Workers). Automatically uses the global Web Crypto API when available, with fallback implementations that throw errors for unavailable operations. Allows overriding any method for testing or custom implementations.