30 lines
892 B
TypeScript
30 lines
892 B
TypeScript
// Copyright 2017-2020 @polkadot/keyring authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { PairInfo } from './types';
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import { stringToU8a, u8aConcat, u8aFixLength, assert } from '@polkadot/util';
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import { naclEncrypt } from '@polkadot/util-crypto';
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import { PKCS8_DIVIDER, PKCS8_HEADER } from './defaults';
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export default function encode ({ publicKey, secretKey }: PairInfo, passphrase?: string): Uint8Array {
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assert(secretKey, 'Expected a valid secretKey to be passed to encode');
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const encoded = u8aConcat(
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PKCS8_HEADER,
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secretKey,
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PKCS8_DIVIDER,
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publicKey
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);
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if (!passphrase) {
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return encoded;
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}
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const { encrypted, nonce } = naclEncrypt(encoded, u8aFixLength(stringToU8a(passphrase), 256, true));
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return u8aConcat(nonce, encrypted);
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}
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