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