ethers.js/packages/crypto/lib/crypto-browser.js
2022-04-11 17:14:19 -04:00

56 lines
1.9 KiB
JavaScript

/* Browser Crypto Shims */
import { hmac } from "@noble/hashes/hmac";
import { pbkdf2 } from "@noble/hashes/pbkdf2";
import { sha256 } from "@noble/hashes/sha256";
import { sha512 } from "@noble/hashes/sha512";
import { logger } from "./logger.js";
function getGlobal() {
if (typeof self !== 'undefined') {
return self;
}
if (typeof window !== 'undefined') {
return window;
}
if (typeof global !== 'undefined') {
return global;
}
throw new Error('unable to locate global object');
}
;
const anyGlobal = getGlobal();
let crypto = anyGlobal.crypto || anyGlobal.msCrypto;
export function createHash(algo) {
switch (algo) {
case "sha256": return sha256.create();
case "sha512": return sha512.create();
}
return logger.throwArgumentError("invalid hashing algorithm name", "algorithm", algo);
}
export function createHmac(_algo, key) {
const algo = ({ sha256, sha512 }[_algo]);
if (algo == null) {
return logger.throwArgumentError("invalid hmac algorithm", "algorithm", _algo);
}
return hmac.create(algo, key);
}
export function pbkdf2Sync(password, salt, iterations, keylen, _algo) {
const algo = ({ sha256, sha512 }[_algo]);
if (algo == null) {
return logger.throwArgumentError("invalid pbkdf2 algorithm", "algorithm", _algo);
}
return pbkdf2(algo, password, salt, { c: iterations, dkLen: keylen });
}
export function randomBytes(length) {
if (crypto == null) {
return logger.throwError("platform does not support secure random numbers", "UNSUPPORTED_OPERATION", {
operation: "randomBytes"
});
}
if (length <= 0 || length > 1024 || (length % 1) || length != length) {
logger.throwArgumentError("invalid length", "length", length);
}
const result = new Uint8Array(length);
crypto.getRandomValues(result);
return result;
}
//# sourceMappingURL=crypto-browser.js.map