47 lines
2.0 KiB
JavaScript
47 lines
2.0 KiB
JavaScript
if (!window.atob) {
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var tableStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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var table = tableStr.split("");
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window.atob = function (base64) {
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if (/(=[^=]+|={3,})$/.test(base64)) throw new Error("String contains an invalid character");
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base64 = base64.replace(/=/g, "");
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var n = base64.length & 3;
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if (n === 1) throw new Error("String contains an invalid character");
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for (var i = 0, j = 0, len = base64.length / 4, bin = []; i < len; ++i) {
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var a = tableStr.indexOf(base64[j++] || "A"), b = tableStr.indexOf(base64[j++] || "A");
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var c = tableStr.indexOf(base64[j++] || "A"), d = tableStr.indexOf(base64[j++] || "A");
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if ((a | b | c | d) < 0) throw new Error("String contains an invalid character");
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bin[bin.length] = ((a << 2) | (b >> 4)) & 255;
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bin[bin.length] = ((b << 4) | (c >> 2)) & 255;
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bin[bin.length] = ((c << 6) | d) & 255;
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};
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return String.fromCharCode.apply(null, bin).substr(0, bin.length + n - 4);
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};
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window.btoa = function (bin) {
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for (var i = 0, j = 0, len = bin.length / 3, base64 = []; i < len; ++i) {
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var a = bin.charCodeAt(j++), b = bin.charCodeAt(j++), c = bin.charCodeAt(j++);
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if ((a | b | c) > 255) throw new Error("String contains an invalid character");
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base64[base64.length] = table[a >> 2] + table[((a << 4) & 63) | (b >> 4)] +
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(isNaN(b) ? "=" : table[((b << 2) & 63) | (c >> 6)]) +
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(isNaN(b + c) ? "=" : table[c & 63]);
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}
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return base64.join("");
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};
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}
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export function hexToBase64(str) {
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return btoa(String.fromCharCode.apply(null,
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str.replace(/\r|\n/g, "").replace(/([\da-fA-F]{2}) ?/g, "0x$1 ").replace(/ +$/, "").split(" "))
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);
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}
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export function base64ToHex(str) {
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for (var i = 0, bin = atob(str.replace(/[ \r\n]+$/, "")), hex = []; i < bin.length; ++i) {
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var tmp = bin.charCodeAt(i).toString(16);
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if (tmp.length === 1) tmp = "0" + tmp;
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hex[hex.length] = tmp;
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}
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return hex.join(" ");
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} |