41 lines
1023 B
TypeScript
41 lines
1023 B
TypeScript
import { webcrypto } from "crypto";
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const subtle = webcrypto.subtle;
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type EncryptedData = {
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iv: ArrayBuffer;
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ciphertext: ArrayBuffer; //tag 포함
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}
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export async function AES_GCM_Encrypt(key: ArrayBuffer, msg: ArrayBuffer): Promise<EncryptedData> {
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const iv = webcrypto.getRandomValues(new Uint8Array(12));
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const keyObj = await subtle.importKey("raw", key, {
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name: "AES-GCM",
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}, false, ["encrypt"]);
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const ciphertext = await subtle.encrypt({
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name: "AES-GCM",
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iv
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}, keyObj, msg);
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return {
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iv,
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ciphertext
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}
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}
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export async function AES_GCM_Decrypt(key: ArrayBuffer, data: EncryptedData): Promise<ArrayBuffer> {
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const keyObj = await subtle.importKey("raw", key, {
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name: "AES-GCM",
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}, false, ["decrypt"]);
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const plaintext = await subtle.decrypt({
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name: "AES-GCM",
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iv: data.iv
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}, keyObj, data.ciphertext);
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//아마도 tag 검증 실패시 예외가 발생할 것으로 예상
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return plaintext;
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} |