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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 | 1x 25x 25x 1x 12x 11x 1x 10x 1x 9x 1x 12x 1x 11x 11x 11x 1x 14x 1x 1x | /**
* Copyright 2019 NEM
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// internal dependencies
/**
* Class `EncryptedPayload` describes an encrypted payload
* with salt and ciphertext properties.
*
* @since 0.3.0
*/
class EncryptedPayload {
constructor(/**
* The payload ciphertext.
* The first X bytes represent the IV.
*
* @var {string}
*/
public readonly ciphertext: string,
/**
* The payload salt.
*
* @var {string}
*/
public readonly salt: string) {}
/**
* Parse a JSON representation of an encrypted
* payload into a `EncryptedPayload` instance.
*
* The provided JSON must contain fields 'ciphertext'
* and 'salt'.
*
* @param {string} json
* @return {EncryptedPayload}
*/
public static fromJSON(
json: string,
): EncryptedPayload {
const jsonObject = EncryptedPayload.validateJson(json);
// validate obligatory fields
if (!jsonObject.hasOwnProperty('ciphertext')) {
throw new Error("Missing mandatory field 'ciphertext'.");
}
if (!jsonObject.hasOwnProperty('salt')) {
throw new Error("Missing mandatory field 'salt'.");
}
return new EncryptedPayload(jsonObject.ciphertext, jsonObject.salt);
}
/**
* Validates given json string and returns json object
* @param json
* @return json object
* @throws {Error} If validation fails
*/
private static validateJson(json: string) {
if (! json.length) {
throw new Error('JSON argument cannot be empty.');
}
// validate JSON
let jsonObject: any;
try {
jsonObject = JSON.parse(json);
} catch (e) {
// Invalid JSON provided, forward error
throw new Error('Invalid json body in payload! ' + e.message);
}
return jsonObject;
}
/**
* Checks if the data ojbect is encrypted
* @param jsonObject
*/
public static isDataEncrypted(jsonObject: any) : boolean {
return jsonObject.hasOwnProperty('ciphertext') && jsonObject.hasOwnProperty('salt');
}
}
export {EncryptedPayload};
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