trent_larson/crowd-funder-for-time-pwa
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move low-level DID-related create & decode into separate folder (#120)

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Co-authored-by: Trent Larson <trent@trentlarson.com>
Reviewed-on: #120
Co-authored-by: trentlarson <trent@trentlarson.com>
Co-committed-by: trentlarson <trent@trentlarson.com>
This commit is contained in:
trentlarson
2024-07-13 13:24:54 -04:00
parent d1d6bf51b8
commit f6338c05ee
12 changed files with 287 additions and 176 deletions
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55
src/libs/crypto/index.ts
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@@ -3,14 +3,13 @@ import { getRandomBytesSync } from "ethereum-cryptography/random";
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 * as u8a from "uint8arrays";
import {
createEndorserJwt,
createEndorserJwtForDid,
ENDORSER_JWT_URL_LOCATION,
} from "@/libs/endorserServer";
import { DEFAULT_DID_PROVIDER_NAME } from "../veramo/setup";
import { decodeEndorserJwt } from "@/libs/crypto/vc";
export const DEFAULT_ROOT_DERIVATION_PATH = "m/84737769'/0'/0'/0'";
@@ -95,58 +94,12 @@ export const accessToken = async (did?: string) => {
const nowEpoch = Math.floor(Date.now() / 1000);
const endEpoch = nowEpoch + 60; // add one minute
const tokenPayload = { exp: endEpoch, iat: nowEpoch, iss: did };
return createEndorserJwt(did, tokenPayload);
return createEndorserJwtForDid(did, tokenPayload);
} else {
return "";
}
};
/**
* Copied out of did-jwt since it's deprecated in that library.
*
* The SimpleSigner returns a configured function for signing data.
*
* @example
* const signer = SimpleSigner(import.meta.env.PRIVATE_KEY)
* signer(data, (err, signature) => {
* ...
* })
*
* @param {String} hexPrivateKey a hex encoded private key
* @return {Function} a configured signer function
*/
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");
}
/**
@return results of uportJwtPayload:
{ iat: number, iss: string (DID), own: { name, publicEncKey (base64-encoded key) } }
@@ -163,7 +116,7 @@ export const getContactPayloadFromJwtUrl = (jwtUrlText: string) => {
}
// JWT format: { header, payload, signature, data }
const jwt = didJwt.decodeJWT(jwtText);
const jwt = decodeEndorserJwt(jwtText);
return jwt.payload;
};