crypto.randomFillSync(buffer[, offset][, size])

• buffer <Buffer> | <TypedArray> | <DataView> 必须提供。
• offset <number> 默认值: 0
• size <number> 默认值: buffer.length - offset
• 返回: <Buffer> | <TypedArray> | <DataView> 对象作为 buffer 参数传入。

crypto.randomFill() 的同步版本。

const buf = Buffer.alloc(10);
console.log(crypto.randomFillSync(buf).toString('hex'));

crypto.randomFillSync(buf, 5);
console.log(buf.toString('hex'));

// 以上等价于以下内容：
crypto.randomFillSync(buf, 5, 5);
console.log(buf.toString('hex'));

任何 TypedArray 或 DataView 实例都可以作为 buffer 传入。

const a = new Uint32Array(10);
console.log(Buffer.from(crypto.randomFillSync(a).buffer,
                        a.byteOffset, a.byteLength).toString('hex'));

const b = new Float64Array(10);
console.log(Buffer.from(crypto.randomFillSync(b).buffer,
                        b.byteOffset, b.byteLength).toString('hex'));

const c = new DataView(new ArrayBuffer(10));
console.log(Buffer.from(crypto.randomFillSync(c).buffer,
                        c.byteOffset, c.byteLength).toString('hex'));

• buffer <Buffer> | <TypedArray> | <DataView> Must be supplied.
• offset <number> Default: 0
• size <number> Default: buffer.length - offset
• Returns: <Buffer> | <TypedArray> | <DataView> The object passed as buffer argument.

Synchronous version of crypto.randomFill().

const buf = Buffer.alloc(10);
console.log(crypto.randomFillSync(buf).toString('hex'));

crypto.randomFillSync(buf, 5);
console.log(buf.toString('hex'));

// The above is equivalent to the following:
crypto.randomFillSync(buf, 5, 5);
console.log(buf.toString('hex'));

Any TypedArray or DataView instance may be passed as buffer.

const a = new Uint32Array(10);
console.log(Buffer.from(crypto.randomFillSync(a).buffer,
                        a.byteOffset, a.byteLength).toString('hex'));

const b = new Float64Array(10);
console.log(Buffer.from(crypto.randomFillSync(b).buffer,
                        b.byteOffset, b.byteLength).toString('hex'));

const c = new DataView(new ArrayBuffer(10));
console.log(Buffer.from(crypto.randomFillSync(c).buffer,
                        c.byteOffset, c.byteLength).toString('hex'));