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fix: use noble-secp256k1 in encryption to replace elliptic dependency
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ahsan-javaid authored and janniks committed Mar 28, 2022
1 parent ca778e4 commit 8cc1774
Showing 1 changed file with 64 additions and 0 deletions.
64 changes: 64 additions & 0 deletions packages/common/src/utils.ts
Original file line number Diff line number Diff line change
Expand Up @@ -413,3 +413,67 @@ export function hexToBigInt(hex: string): bigint {
export function utf8ToBytes(content: string) {
return new TextEncoder().encode(content);
}

/*
The `concatBytes` and `hexToBytes` methods below were taken from
[noble-secp256k1](https://github.com/paulmillr/noble-secp256k1)
Copyright (c) 2019 Paul Miller (https://paulmillr.com)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
*/

/**
* Reference: https://github.com/paulmillr/noble-secp256k1/blob/976d3b59bbd30f2d28638e5420b219fd3d829169/index.ts#L669-L682
* Using this function from noble-secp256k1 as its not exported by library till v1.5.5
* Concatenates several Uint8Arrays into one
* @param {byteArrays[]} Uint8Array[] array of arrays
* @output {Uint8Array} instance of bytes concatenated
*/
export function concatBytes(byteArrays: Uint8Array[]): Uint8Array {
const totalSize = byteArrays.reduce((len, bytes) => len + bytes.length, 0);
const resultArray = new Uint8Array(totalSize);
let offset = 0;
for (let i = 0; i < byteArrays.length; i++) {
resultArray.set(byteArrays[i], offset);
offset += byteArrays[i].length;
}
return resultArray;
}

/**
* Reference: https://github.com/paulmillr/noble-secp256k1/blob/976d3b59bbd30f2d28638e5420b219fd3d829169/index.ts#L726-L740
* Using this function from noble-secp256k1 as its not exported by library till v1.5.5
* Converts hex string to Uint8Array
* @param {hex} hex string without 0x prefix
* @output {Uint8Array} instance of bytes
*/
export function hexToBytes(hex: string): Uint8Array {
if (typeof hex !== 'string') {
throw new TypeError('hexToBytes: expected string, got ' + typeof hex);
}
if (hex.slice(0, 2) === '0x') {
throw new Error('input hex should be without 0x prefix');
}
if (hex.length % 2)
throw new Error(`hexToBytes: received invalid unpadded hex, got: ${hex.length}`);

const array = new Uint8Array(hex.length / 2);

for (let i = 0; i < array.length; i++) {
const j = i * 2;
const hexByte = hex.slice(j, j + 2);
const byte = Number.parseInt(hexByte, 16);
if (Number.isNaN(byte) || byte < 0) throw new Error('Invalid byte sequence');
array[i] = byte;
}
return array;
}

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