코드 이식

@sammo/crypto/src/AES.ts

@@ -0,0 +1,61 @@
+import type { BufferSource } from "./types.js";
+
+const subtle = globalThis.crypto.subtle;
+
+
+export async function AES_GCM_Encrypt(key: BufferSource | CryptoKey, iv: BufferSource, msg: BufferSource, aad?: BufferSource): Promise<ArrayBuffer> {
+    const keyObj = key instanceof CryptoKey ? key : await subtle.importKey("raw", key, {
+        name: "AES-GCM",
+    }, false, ["encrypt"]);
+
+    const ciphertext = await subtle.encrypt({
+        name: "AES-GCM",
+        iv,
+        additionalData: aad
+    }, keyObj, msg);
+
+    return ciphertext;
+}
+
+
+export async function AES_GCM_Decrypt(key: BufferSource | CryptoKey, iv: BufferSource, ciphertext: BufferSource, aad?: BufferSource): Promise<ArrayBuffer> {
+    const keyObj = key instanceof CryptoKey ? key : await subtle.importKey("raw", key, {
+        name: "AES-GCM",
+    }, false, ["decrypt"]);
+
+    const plaintext = await subtle.decrypt({
+        name: "AES-GCM",
+        iv: iv,
+        additionalData: aad
+    }, keyObj, ciphertext);
+    //아마도 tag 검증 실패시 예외가 발생할 것으로 예상
+
+    return plaintext;
+}
+
+export async function AES_CBC_Encrypt(key: BufferSource | CryptoKey, iv: BufferSource, msg: BufferSource): Promise<ArrayBuffer> {
+    const keyObj = key instanceof CryptoKey ? key : await subtle.importKey("raw", key, {
+        name: "AES-CBC",
+    }, false, ["encrypt"]);
+
+    const ciphertext = await subtle.encrypt({
+        name: "AES-CBC",
+        iv,
+    }, keyObj, msg);
+
+    return ciphertext;
+}
+
+
+export async function AES_CBC_Decrypt(key: BufferSource | CryptoKey, iv: BufferSource, ciphertext: BufferSource): Promise<ArrayBuffer> {
+    const keyObj = key instanceof CryptoKey ? key : await subtle.importKey("raw", key, {
+        name: "AES-CBC",
+    }, false, ["decrypt"]);
+
+    const plaintext = await subtle.decrypt({
+        name: "AES-CBC",
+        iv: iv,
+    }, keyObj, ciphertext);
+
+    return plaintext;
+}