@bicycle-codes/simple-aes/dist/util.js

An easy way to use symmetric keys in browsers or node

import { fromString } from 'uint8arrays';
var CharSize;
(function (CharSize) {
    CharSize[CharSize["B8"] = 8] = "B8";
    CharSize[CharSize["B16"] = 16] = "B16";
})(CharSize || (CharSize = {}));
export const normalizeToBuf = function normalizeToBuf(msg, strConv) {
    if (typeof msg === 'string') {
        return strConv(msg);
    }
    else if (typeof msg === 'object' && msg.byteLength !== undefined) {
        // this is the best runtime check I could find for ArrayBuffer/Uint8Array
        const temp = new Uint8Array(msg);
        return temp.buffer;
    }
    else {
        throw new Error('Improper value. Must be a string, ArrayBuffer, Uint8Array');
    }
};
export function base64ToArrBuf(encoding, string) {
    return fromString(string, encoding).buffer;
}
export function normalizeBase64ToBuf(msg, encoding) {
    return normalizeToBuf(msg, base64ToArrBuf.bind(null, encoding));
}
export const normalizeUtf16ToBuf = (msg) => {
    return normalizeToBuf(msg, (str) => strToArrBuf(str, CharSize.B16));
};
function strToArrBuf(str, charSize) {
    const view = charSize === 8 ? new Uint8Array(str.length) : new Uint16Array(str.length);
    for (let i = 0, strLen = str.length; i < strLen; i++) {
        view[i] = str.charCodeAt(i);
    }
    return view.buffer;
}
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