INNER CODE UNIT · TypeScript

runCipher

paulmillr/noble-ciphers · src/_arx.ts:158

function runCipher(
  core: TArg<CipherCoreFn>,
  sigma: TArg<Uint32Array>,
  key: TArg<Uint32Array>,
  nonce: TArg<Uint32Array>,
  data: TArg<Uint8Array>,
  output: TArg<Uint8Array>,
  counter: number,
  rounds: number
): void {
  const len = data.length;
  const block = new Uint8Array(BLOCK_LEN);
  const b32 = u32(block);
  // Make sure that buffers aligned to 4 bytes
  const isAligned = isLE && isAligned32(data) && isAligned32(output);
  const d32 = isAligned ? u32(data) : U32_EMPTY;
  const o32 = isAligned ? u32(output) : U32_EMPTY;
  // RFC 8439 §2.4.1 / RFC 7539 §2.4.1 allow XORing one keystream block at a time and

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