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 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | 1x 1x 64x 64x 46x 46x 46x 46x 21x 21x 21x 19x 1x 1x 2x 1x 1x 1x 1x 1x 2x 2x 2x 2x 1x 1x 1x 1x 1x 2x 2x 2x 1x 65x 65x 1x 64x | import { getCryptoLib } from './cryptoUtils' type NodeCryptoCreateCipher = typeof import('crypto').createCipheriv; type NodeCryptoCreateDecipher = typeof import('crypto').createDecipheriv; export type CipherAlgorithm = 'aes-256-cbc' | 'aes-128-cbc'; export interface AesCipher { encrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer>; decrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer>; } export class NodeCryptoAesCipher implements AesCipher { createCipher: NodeCryptoCreateCipher createDecipher: NodeCryptoCreateDecipher constructor(createCipher: NodeCryptoCreateCipher, createDecipher: NodeCryptoCreateDecipher) { this.createCipher = createCipher this.createDecipher = createDecipher } async encrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer> { Iif (algorithm !== 'aes-128-cbc' && algorithm !== 'aes-256-cbc') { throw new Error(`Unsupported cipher algorithm "${algorithm}"`) } const cipher = this.createCipher(algorithm, key, iv) const result = Buffer.concat([cipher.update(data), cipher.final()]) return Promise.resolve(result) } async decrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer> { Iif (algorithm !== 'aes-128-cbc' && algorithm !== 'aes-256-cbc') { throw new Error(`Unsupported cipher algorithm "${algorithm}"`) } const cipher = this.createDecipher(algorithm, key, iv) const result = Buffer.concat([cipher.update(data), cipher.final()]) return Promise.resolve(result) } } export class WebCryptoAesCipher implements AesCipher { subtleCrypto: SubtleCrypto constructor(subtleCrypto: SubtleCrypto) { this.subtleCrypto = subtleCrypto } async encrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer> { let algo: string let length: number if (algorithm === 'aes-128-cbc') { algo = 'AES-CBC' length = 128 } else Eif (algorithm === 'aes-256-cbc') { algo = 'AES-CBC' length = 256 } else { throw new Error(`Unsupported cipher algorithm "${algorithm}"`) } const cryptoKey = await this.subtleCrypto.importKey( 'raw', key, { name: algo, length }, false, ['encrypt'] ) const result = await this.subtleCrypto.encrypt({ name: algo, iv }, cryptoKey, data) return Buffer.from(result) } async decrypt( algorithm: CipherAlgorithm, key: Buffer, iv: Buffer, data: Buffer): Promise<Buffer> { let algo: string let length: number if (algorithm === 'aes-128-cbc') { algo = 'AES-CBC' length = 128 } else Eif (algorithm === 'aes-256-cbc') { algo = 'AES-CBC' length = 256 } else { throw new Error(`Unsupported cipher algorithm "${algorithm}"`) } const cryptoKey = await this.subtleCrypto.importKey( 'raw', key, { name: algo, length }, false, ['decrypt'] ) const result = await this.subtleCrypto.decrypt({ name: algo, iv }, cryptoKey, data) return Buffer.from(result) } } export async function createCipher(): Promise<AesCipher> { const cryptoLib = await getCryptoLib() if (cryptoLib.name === 'subtleCrypto') { return new WebCryptoAesCipher(cryptoLib.lib) } else { return new NodeCryptoAesCipher(cryptoLib.lib.createCipheriv, cryptoLib.lib.createDecipheriv) } } |