mode-ecb.ts•965 B
// Electronic Code Book
import { ModeOfOperation } from "./mode.js";
export class ECB extends ModeOfOperation {
constructor(key: Uint8Array) {
super("ECB", key, ECB);
}
encrypt(plaintext: Uint8Array): Uint8Array {
if (plaintext.length % 16) {
throw new TypeError("invalid plaintext size (must be multiple of 16 bytes)");
}
const crypttext = new Uint8Array(plaintext.length);
for (let i = 0; i < plaintext.length; i += 16) {
crypttext.set(this.aes.encrypt(plaintext.subarray(i, i + 16)), i);
}
return crypttext;
}
decrypt(crypttext: Uint8Array): Uint8Array {
if (crypttext.length % 16) {
throw new TypeError("invalid ciphertext size (must be multiple of 16 bytes)");
}
const plaintext = new Uint8Array(crypttext.length);
for (let i = 0; i < crypttext.length; i += 16) {
plaintext.set(this.aes.decrypt(crypttext.subarray(i, i + 16)), i);
}
return plaintext;
}
}