Function HMAC

src/cmap/auth/scram.ts:275–292

(
  method: CryptoMethod,
  key: Uint8Array,
  text: Uint8Array | string
)

}

async function HMAC(
  method: CryptoMethod,
  key: Uint8Array,
  text: Uint8Array | string
): Promise<Uint8Array> {
  const keyBuffer = ByteUtils.toLocalBufferType(key);
  const cryptoKey = await crypto.subtle.importKey(
    'raw',
    keyBuffer,
    { name: 'HMAC', hash: { name: method === 'sha256' ? 'SHA-256' : 'SHA-1' } },
    false,
    ['sign', 'verify']
  );
  const textData: Uint8Array = typeof text === 'string' ? new TextEncoder().encode(text) : text;
  const textBuffer = ByteUtils.toLocalBufferType(textData);
  const signature = await crypto.subtle.sign('HMAC', cryptoKey, textBuffer);
  return new Uint8Array(signature);
}

interface HICache {
  [key: string]: Uint8Array;