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auth.ts
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auth.ts
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import { AuthType, ReqMeta } from '@/types/auth';
import { hexlify, joinSignature } from '@ethersproject/bytes';
import { SigningKey } from '@ethersproject/signing-key';
import { ed25519 } from '@noble/curves/ed25519';
import { Headers } from 'cross-fetch';
import { keccak256 } from 'ethereum-cryptography/keccak.js';
import { utf8ToBytes } from 'ethereum-cryptography/utils.js';
export const getCanonicalHeaders = (reqMeta: Partial<ReqMeta>, reqHeaders: Headers) => {
const sortedHeaders = getSortedHeaders(reqHeaders, SUPPORTED_HEADERS);
const res: string[] = [];
sortedHeaders.forEach((k) => {
const v = reqHeaders.get(k);
res.push(`${k}:${v}`);
});
if (reqMeta.url && reqMeta.url.hostname) {
res.push(reqMeta.url.hostname);
}
res.push('');
return res.join('\n');
};
const getSortedHeaders = (reqHeaders: Headers, supportHeaders: string[]) => {
const signedHeaders: string[] = [];
reqHeaders.forEach((v, k) => {
if (supportHeaders.includes(k)) {
signedHeaders.push(k);
}
});
return signedHeaders.sort();
};
const getSignedHeaders = (reqHeaders: Headers) => {
const sortedHeaders = getSortedHeaders(reqHeaders, SUPPORTED_HEADERS);
return sortedHeaders.join(';');
};
export const getCanonicalRequest = (reqMeta: Partial<ReqMeta>, reqHeaders: Headers) => {
const canonicalHeaders = getCanonicalHeaders(reqMeta, reqHeaders);
const signedHeaders = getSignedHeaders(reqHeaders);
const canonicalRequestArr = [
reqMeta.method,
reqMeta.url?.path,
reqMeta.url?.query,
canonicalHeaders,
signedHeaders,
];
const canonicalRequest = canonicalRequestArr.join('\n');
return canonicalRequest;
};
export const getAuthorization = (canonicalRequest: string, authType: AuthType) => {
// console.log('canonicalRequest', canonicalRequest);
const unsignedMsg = getMsgToSign(utf8ToBytes(canonicalRequest));
let authorization = '';
if (authType.type === 'ECDSA') {
const sig = secpSign(unsignedMsg, authType.privateKey);
authorization = `GNFD1-ECDSA, Signature=${sig.slice(2)}`;
} else {
const sig = hexlify(ed25519.sign(hexlify(unsignedMsg).slice(2), authType.seed.slice(2)));
authorization = `GNFD2-EDDSA,Signature=${sig.slice(2)}`;
}
return authorization;
};
export const newRequestHeadersByMeta = (meta: Partial<ReqMeta>) => {
const headers = new Headers();
if (meta.contentType) {
headers.set(HTTPHeaderContentType.toLocaleLowerCase(), meta.contentType);
}
if (meta.txnHash && meta.txnHash !== '') {
headers.set(HTTPHeaderTransactionHash.toLocaleLowerCase(), meta.txnHash);
}
if (meta.contentSHA256) {
headers.set(HTTPHeaderContentSHA256.toLocaleLowerCase(), meta.contentSHA256);
}
if (meta.unsignMsg) {
headers.set(HTTPHeaderUnsignedMsg.toLocaleLowerCase(), meta.unsignMsg);
}
if (meta.userAddress) {
headers.set(HTTPHeaderUserAddress, meta.userAddress);
}
const date = new Date();
if (meta.date) {
headers.set(HTTPHeaderDate.toLocaleLowerCase(), formatDate(meta.date));
} else {
headers.set(HTTPHeaderDate.toLocaleLowerCase(), formatDate(date));
}
if (meta.expiryTimestamp) {
headers.set(HTTPHeaderExpiryTimestamp.toLocaleLowerCase(), formatDate(meta.expiryTimestamp));
} else {
date.setHours(date.getHours() + 2);
headers.set(HTTPHeaderExpiryTimestamp.toLocaleLowerCase(), formatDate(date));
}
return headers;
};
function formatDate(date: Date): string {
const res = date.toISOString();
return res.replace(/\.\d{3}/gi, '');
}
export const HTTPHeaderAuthorization = 'Authorization';
export const HTTPHeaderContentSHA256 = 'X-Gnfd-Content-Sha256';
export const HTTPHeaderTransactionHash = 'X-Gnfd-Txn-Hash';
export const HTTPHeaderObjectID = 'X-Gnfd-Object-ID';
export const HTTPHeaderRedundancyIndex = 'X-Gnfd-Redundancy-Index';
export const HTTPHeaderResource = 'X-Gnfd-Resource';
export const HTTPHeaderDate = 'X-Gnfd-Date';
export const HTTPHeaderExpiryTimestamp = 'X-Gnfd-Expiry-Timestamp';
export const HTTPHeaderRange = 'Range';
export const HTTPHeaderPieceIndex = 'X-Gnfd-Piece-Index';
export const HTTPHeaderContentType = 'Content-Type';
export const HTTPHeaderContentMD5 = 'Content-MD5';
export const HTTPHeaderUnsignedMsg = 'X-Gnfd-Unsigned-Msg';
export const HTTPHeaderUserAddress = 'X-Gnfd-User-Address';
export const HTTPHeaderAppDomain = 'X-Gnfd-App-Domain';
export const HTTPHeaderRegPubKey = 'X-Gnfd-App-Reg-Public-Key';
const SUPPORTED_HEADERS = [
HTTPHeaderContentSHA256.toLocaleLowerCase(),
HTTPHeaderTransactionHash.toLocaleLowerCase(),
HTTPHeaderObjectID.toLocaleLowerCase(),
HTTPHeaderRedundancyIndex.toLocaleLowerCase(),
HTTPHeaderResource.toLocaleLowerCase(),
HTTPHeaderDate.toLocaleLowerCase(),
HTTPHeaderExpiryTimestamp.toLocaleLowerCase(),
HTTPHeaderRange.toLocaleLowerCase(),
HTTPHeaderPieceIndex.toLocaleLowerCase(),
HTTPHeaderContentType.toLocaleLowerCase(),
HTTPHeaderContentMD5.toLocaleLowerCase(),
HTTPHeaderUnsignedMsg.toLocaleLowerCase(),
HTTPHeaderUserAddress.toLocaleLowerCase(),
// HTTPHeaderAppDomain.toLocaleLowerCase(),
];
// https://github.com/ethers-io/ethers.js/discussions/4339
export const secpSign = (digestBz: Uint8Array, privateKey: string) => {
const signingKey = new SigningKey(privateKey);
const signature = signingKey.signDigest(digestBz);
let res = joinSignature(signature);
const v = res.slice(-2);
if (v === '1c') res = res.slice(0, -2) + '01';
if (v === '1b') res = res.slice(0, -2) + '00';
return res;
};
export const getMsgToSign = (unsignedBytes: Uint8Array): Uint8Array => {
const res = keccak256(unsignedBytes);
return res;
};
export const encodePath = (pathName: string) => {
const reservedNames = /^[a-zA-Z0-9-_.~/]+$/;
if (reservedNames.test(pathName)) {
return pathName;
}
let encodedPathName = '';
for (let i = 0; i < pathName.length; i++) {
const s = pathName[i];
// soft characters
if (('A' <= s && s <= 'Z') || ('a' <= s && s <= 'z') || ('0' <= s && s <= '9')) {
encodedPathName += s;
continue;
}
switch (s) {
// special characters are allowed
case '-':
case '_':
case '.':
case '~':
case '/':
encodedPathName += s;
continue;
// others characters need to be encoded
default:
// . ! @ # $ % ^ & * ) ( - + = { } [ ] / " , ' < > ~ \ .` ? : ; | \\
if (/[.!@#\$%\^&\*\)\(\-+=\{\}\[\]\/\",'<>~\·`\?:;|\\]+$/.test(s)) {
// english characters
const hexStr = s.charCodeAt(0).toString(16);
encodedPathName += '%' + hexStr.toUpperCase();
} else {
// others characters
encodedPathName += encodeURI(s);
}
}
}
return encodedPathName;
};
export const getSortQuery = (queryMap: Record<string, string>) => {
const queryParams = new URLSearchParams();
for (const k in queryMap) {
queryParams.append(k, queryMap[k]);
}
queryParams.sort();
return queryParams.toString();
};
export const getSortQueryParams = (url: URL, queryMap: Record<string, string>) => {
// const queryParams = new URLSearchParams();
for (const k in queryMap) {
url.searchParams.append(k, queryMap[k]);
}
url.searchParams.sort();
return url;
};