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joplin/packages/lib/services/e2ee/RSA.node.ts

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import { RSA, RSAKeyPair } from './types';
import * as NodeRSA from 'node-rsa';
const nodeRSAOptions: NodeRSA.Options = {
// Must use pkcs1 otherwise any data encrypted with NodeRSA will crash the
// app when decrypted by RN-RSA.
// https://github.com/amitaymolko/react-native-rsa-native/issues/66#issuecomment-932768139
encryptionScheme: 'pkcs1',
};
const rsa: RSA = {
generateKeyPair: async (keySize: number): Promise<RSAKeyPair> => {
const keys = new NodeRSA();
keys.setOptions(nodeRSAOptions);
keys.generateKeyPair(keySize, 65537);
// Sanity check
if (!keys.isPrivate()) throw new Error('No private key was generated');
if (!keys.isPublic()) throw new Error('No public key was generated');
return keys;
},
loadKeys: async (publicKey: string, privateKey: string): Promise<RSAKeyPair> => {
const keys = new NodeRSA();
keys.setOptions(nodeRSAOptions);
// Don't specify the import format, and let it auto-detect because
// react-native-rsa might not create a key in the expected format.
keys.importKey(publicKey);
if (privateKey) keys.importKey(privateKey);
return keys;
},
encrypt: async (plaintextUtf8: string, rsaKeyPair: RSAKeyPair): Promise<string> => {
return rsaKeyPair.encrypt(plaintextUtf8, 'base64', 'utf8');
},
decrypt: async (ciphertextBase64: string, rsaKeyPair: RSAKeyPair): Promise<string> => {
return rsaKeyPair.decrypt(ciphertextBase64, 'utf8');
},
publicKey: (rsaKeyPair: RSAKeyPair): string => {
return rsaKeyPair.exportKey('pkcs1-public-pem');
},
privateKey: (rsaKeyPair: RSAKeyPair): string => {
return rsaKeyPair.exportKey('pkcs1-private-pem');
},
};
export default rsa;