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refactor: use our own SimpleSigner since library version is deprecated

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Trent Larson
2023-01-09 19:08:41 -07:00
parent 41d8df2238
commit 2a7c858662
3 changed files with 36 additions and 53 deletions
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81
src/libs/crypto/index.ts
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@@ -5,44 +5,8 @@ import { entropyToMnemonic } from "ethereum-cryptography/bip39";
import { wordlist } from "ethereum-cryptography/bip39/wordlists/english";
import { HDNode } from "@ethersproject/hdnode";
import * as didJwt from "did-jwt";
import { Signer } from "did-jwt";
import * as u8a from "uint8arrays";
export function hexToBytes(s: string): Uint8Array {
const input = s.startsWith("0x") ? s.substring(2) : s;
return u8a.fromString(input.toLowerCase(), "base16");
}
export function fromJose(signature: string): {
r: string;
s: string;
recoveryParam?: number;
} {
const signatureBytes: Uint8Array = base64ToBytes(signature);
if (signatureBytes.length < 64 || signatureBytes.length > 65) {
throw new TypeError(
`Wrong size for signature. Expected 64 or 65 bytes, but got ${signatureBytes.length}`
);
}
const r = bytesToHex(signatureBytes.slice(0, 32));
const s = bytesToHex(signatureBytes.slice(32, 64));
const recoveryParam =
signatureBytes.length === 65 ? signatureBytes[64] : undefined;
return { r, s, recoveryParam };
}
export function bytesToHex(b: Uint8Array): string {
return u8a.toString(b, "base16");
}
export function base64ToBytes(s: string): Uint8Array {
const inputBase64Url = s
.replace(/\+/g, "-")
.replace(/\//g, "_")
.replace(/=/g, "");
return u8a.fromString(inputBase64Url, "base64url");
}
/**
*
*
@@ -117,12 +81,8 @@ export const createIdentifier = (): string => {
export const accessToken = async (identifier: IIdentifier) => {
const did: string = identifier.did;
const privateKeyHex: string = identifier.keys[0].privateKeyHex as string;
//const input = privateKeyHex.startsWith("0x")
// ? privateKeyHex.substring(2)
// : privateKeyHex;
//const privateKeyBytes = u8a.fromString(input.toLowerCase(), "base16");
const signer = didJwt.SimpleSigner(privateKeyHex);
const signer = SimpleSigner(privateKeyHex);
const nowEpoch = Math.floor(Date.now() / 1000);
const endEpoch = nowEpoch + 60; // add one minute
@@ -138,17 +98,14 @@ export const accessToken = async (identifier: IIdentifier) => {
};
export const sign = async (privateKeyHex: string) => {
//const input = privateKeyHex.startsWith("0x")
// ? privateKeyHex.substring(2)
// : privateKeyHex;
// const privateKeyBytes = u8a.fromString(input.toLowerCase(), "base16");
const signer = didJwt.SimpleSigner(privateKeyHex);
const signer = SimpleSigner(privateKeyHex);
return signer;
};
/**
* Copied out of did-jwt since it's deprecated in that library.
*
* The SimpleSigner returns a configured function for signing data.
*
* @example
@@ -160,10 +117,34 @@ export const sign = async (privateKeyHex: string) => {
* @param {String} hexPrivateKey a hex encoded private key
* @return {Function} a configured signer function
*/
export const SimpleSigner = async (hexPrivateKey: string): Promise<Signer> => {
const signer = didJwt.ES256KSigner(hexToBytes(hexPrivateKey), true);
export function SimpleSigner(hexPrivateKey: string): didJwt.Signer {
const signer = didJwt.ES256KSigner(didJwt.hexToBytes(hexPrivateKey), true);
return async (data) => {
const signature = (await signer(data)) as string;
return fromJose(signature);
};
};
}
// from did-jwt/util; see SimpleSigner above
export function fromJose(signature: string): {
r: string;
s: string;
recoveryParam?: number;
} {
const signatureBytes: Uint8Array = didJwt.base64ToBytes(signature);
if (signatureBytes.length < 64 || signatureBytes.length > 65) {
throw new TypeError(
`Wrong size for signature. Expected 64 or 65 bytes, but got ${signatureBytes.length}`
);
}
const r = bytesToHex(signatureBytes.slice(0, 32));
const s = bytesToHex(signatureBytes.slice(32, 64));
const recoveryParam =
signatureBytes.length === 65 ? signatureBytes[64] : undefined;
return { r, s, recoveryParam };
}
// from did-jwt/util; see SimpleSigner above
export function bytesToHex(b: Uint8Array): string {
return u8a.toString(b, "base16");
}