12 lines
484 B
JavaScript
12 lines
484 B
JavaScript
import { fromString } from "@smithy/util-buffer-from";
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const BASE64_REGEX = /^[A-Za-z0-9+/]*={0,2}$/;
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export const fromBase64 = (input) => {
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if ((input.length * 3) % 4 !== 0) {
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throw new TypeError(`Incorrect padding on base64 string.`);
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}
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if (!BASE64_REGEX.exec(input)) {
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throw new TypeError(`Invalid base64 string.`);
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}
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const buffer = fromString(input, "base64");
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return new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength);
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};
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