| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | const crypto_1 = require("crypto");
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| 4 | function s2b(str, encoding) {
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| 5 | return Buffer.from(str, encoding);
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| 6 | }
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| 7 | function safeCompare(a, b) {
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| 8 | if (a.length !== b.length) {
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| 9 | return false;
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| 10 | }
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| 11 | return crypto_1.timingSafeEqual(a, b);
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| 12 | }
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| 13 | function validateSignature(body, channelSecret, signature) {
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| 14 | return safeCompare(crypto_1.createHmac("SHA256", channelSecret).update(body).digest(), s2b(signature, "base64"));
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| 15 | }
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| 16 | exports.default = validateSignature;
|