关于火山v8js引擎 没有getRandomValues 这个的替换方案

desk

function randoms(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min)
}

function getRandomValues(buf) {
    var min = 0,
        max = 255;
    if (buf.length > 65536) {
        var e = new Error();
        e.code = 22;
        e.message = 'Failed to execute \'getRandomValues\' : The ' + 'ArrayBufferView\'s byte length (' + buf.length + ') exceeds the ' + 'number of bytes of entropy available via this API (65536).';
        e.name = 'QuotaExceededError';
        throw e;
    }
    if (buf instanceof Uint16Array) {
        max = 65535;
    } else if (buf instanceof Uint32Array) {
        max = 4294967295;
    }
    for (var element in buf) {
        buf[element] = randoms(min, max);
    }
    return buf;
}

function lxx() {
    var K = new Uint32Array(16);

    for (getRandomValues(K), G = 0; G < K.length; ++G) {
        var rx = K[G]
                var r = K.reduce((function(K, rx) {
                return K + rx.toString(16)
            }
            ), "");
                return r
    }

}

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desk

落枫_rain 发表于 2021-10-11 11:14
本帖最后由 落枫_rain 于 2021-10-11 11:30 编辑
    window.crypto.getRandomValues = function(array){ ...

V8里没这个window.crypto.getRandomValues

落枫_rain

    window.crypto.getRandomValues = function(array){
        if (array === undefined)throw new TypeError("Failed to execute 'getRandomValues' on 'Crypto': 1 argument required, but only 0 present.");
        if (array.constructor.name === "Uint8Array" && array.length > 65536)throw new DOMException("Failed to execute 'getRandomValues' on 'Crypto': The ArrayBufferView's byte length (".concat(array.length) + ") exceeds the number of bytes of entropy available via this API (65536).","QuotaExceededError",22);
        if (array.constructor.name === "Uint16Array" && array.length > 32768)throw new DOMException("Failed to execute 'getRandomValues' on 'Crypto': The ArrayBufferView's byte length (".concat(array.length*2) + ") exceeds the number of bytes of entropy available via this API (65536).","QuotaExceededError",22);
        if (array.constructor.name === "Uint32Array" && array.length > 16384)throw new DOMException("Failed to execute 'getRandomValues' on 'Crypto': The ArrayBufferView's byte length (".concat(array.length*4) + ") exceeds the number of bytes of entropy available via this API (65536).","QuotaExceededError",22);
        if (array.constructor.name === "Uint8ClampedArray" && array.length > 65536)throw new DOMException("Failed to execute 'getRandomValues' on 'Crypto': The ArrayBufferView's byte length (".concat(array.length) + ") exceeds the number of bytes of entropy available via this API (65536).","QuotaExceededError",22);
        for (let key in array){
            array[key] = Math.random()*100000000;
        }
    }