Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 42x | import { CipherAlgorithm, AesCipher } from './types'; export class WebCryptoAesCipher implements AesCipher { webCrypto: Crypto; constructor(webCrypto: Crypto) { this.webCrypto = webCrypto; } async encrypt( algorithm: CipherAlgorithm, key: Uint8Array, iv: Uint8Array, data: Uint8Array ): Promise<Uint8Array> { let algo: string; let length: number; if (algorithm === 'aes-128-cbc') { algo = 'AES-CBC'; length = 128; } else if (algorithm === 'aes-256-cbc') { algo = 'AES-CBC'; length = 256; } else { throw new Error(`Unsupported cipher algorithm "${algorithm}"`); } const cryptoKey = await this.webCrypto.subtle.importKey( 'raw', key, { name: algo, length }, false, ['encrypt'] ); const result: ArrayBuffer = await this.webCrypto.subtle.encrypt( { name: algo, iv }, cryptoKey, data ); return new Uint8Array(result); } async decrypt( algorithm: CipherAlgorithm, key: Uint8Array, iv: Uint8Array, data: Uint8Array ): Promise<Uint8Array> { let algo: string; let length: number; if (algorithm === 'aes-128-cbc') { algo = 'AES-CBC'; length = 128; } else if (algorithm === 'aes-256-cbc') { algo = 'AES-CBC'; length = 256; } else { throw new Error(`Unsupported cipher algorithm "${algorithm}"`); } const cryptoKey = await this.webCrypto.subtle.importKey( 'raw', key, { name: algo, length }, false, ['decrypt'] ); const result: ArrayBuffer = await this.webCrypto.subtle.decrypt( { name: algo, iv }, cryptoKey, data ); return new Uint8Array(result); } } |