Marc Mintel
5397309103
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12 lines
547 B
Plaintext
12 lines
547 B
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.default = cbcTag;
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const node_crypto_1 = require("node:crypto");
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const buffer_utils_js_1 = require("../lib/buffer_utils.js");
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function cbcTag(aad, iv, ciphertext, macSize, macKey, keySize) {
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const macData = (0, buffer_utils_js_1.concat)(aad, iv, ciphertext, (0, buffer_utils_js_1.uint64be)(aad.length << 3));
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const hmac = (0, node_crypto_1.createHmac)(`sha${macSize}`, macKey);
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hmac.update(macData);
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return hmac.digest().slice(0, keySize >> 3);
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}
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