multi-downloader-nx_mirror/modules/playready/key.ts

enum KeyType {
  Invalid = 0x0000,
  AES128CTR = 0x0001,
  RC4 = 0x0002,
  AES128ECB = 0x0003,
  Cocktail = 0x0004,
  AESCBC = 0x0005,
  UNKNOWN = 0xffff,
}

function getKeyType(value: number): KeyType {
    switch (value) {
    case KeyType.Invalid:
    case KeyType.AES128CTR:
    case KeyType.RC4:
    case KeyType.AES128ECB:
    case KeyType.Cocktail:
    case KeyType.AESCBC:
        return value;
    default:
        return KeyType.UNKNOWN;
    }
}

enum CipherType {
  Invalid = 0x0000,
  RSA128 = 0x0001,
  ChainedLicense = 0x0002,
  ECC256 = 0x0003,
  ECCforScalableLicenses = 0x0004,
  Scalable = 0x0005,
  UNKNOWN = 0xffff,
}

function getCipherType(value: number): CipherType {
    switch (value) {
    case CipherType.Invalid:
    case CipherType.RSA128:
    case CipherType.ChainedLicense:
    case CipherType.ECC256:
    case CipherType.ECCforScalableLicenses:
    case CipherType.Scalable:
        return value;
    default:
        return CipherType.UNKNOWN;
    }
}

export class Key {
    key_id: string;
    key_type: KeyType;
    cipher_type: CipherType;
    key_length: number;
    key: string;

    constructor(
        key_id: string,
        key_type: number,
        cipher_type: number,
        key_length: number,
        key: Buffer
    ) {
        this.key_id = key_id;
        this.key_type = getKeyType(key_type);
        this.cipher_type = getCipherType(cipher_type);
        this.key_length = key_length;
        this.key = key.toString('hex');
    }
}