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• .. (вверх)
• [DIR] ..
• [FILE] aes.ts
• [FILE] index.ts
• [FILE] mode-cbc.ts
• [FILE] mode-cfb.ts
• [FILE] mode-ctr.ts
• [FILE] mode-ecb.ts
• [FILE] mode-ofb.ts
• [FILE] mode.ts
• [FILE] padding.ts
• [FILE] tests.ts

Просмотр файла: mode-ecb.ts

// 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;
  }
}

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