tornado-packages/ethers.js
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Prevent signing invalid digests.

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This commit is contained in:
Richard Moore 2022-10-20 04:59:55 -04:00
parent 5813b316d7
commit 83d01f86ba
1 changed files with 5 additions and 5 deletions
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10
src.ts/crypto/signing-key.ts
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@ -2,7 +2,8 @@
import * as secp256k1 from "@noble/secp256k1";
import {
concat, getBytes, getBytesCopy, hexlify, toHex, throwArgumentError
concat, dataLength, getBytes, getBytesCopy, hexlify, toHex,
assertArgument, throwArgumentError
} from "../utils/index.js";
import { computeHmac } from "./hmac.js";
@ -38,9 +39,7 @@ export class SigningKey {
get compressedPublicKey(): string { return SigningKey.computePublicKey(this.#privateKey, true); }
sign(digest: BytesLike): Frozen<Signature> {
/* @TODO
logger.assertArgument(() => (dataLength(digest) === 32), "invalid digest length", "digest", digest);
*/
assertArgument(dataLength(digest) === 32, "invalid digest length", "digest", digest);
const [ sigDer, recid ] = secp256k1.signSync(getBytesCopy(digest), getBytesCopy(this.#privateKey), {
recovered: true,
@ -48,7 +47,6 @@ export class SigningKey {
});
const sig = secp256k1.Signature.fromHex(sigDer);
return Signature.from({
r: toHex("0x" + sig.r.toString(16), 32),
s: toHex("0x" + sig.s.toString(16), 32),
@ -81,6 +79,8 @@ export class SigningKey {
}
static recoverPublicKey(digest: BytesLike, signature: SignatureLike): string {
assertArgument(dataLength(digest) === 32, "invalid digest length", "digest", digest);
const sig = Signature.from(signature);
const der = secp256k1.Signature.fromCompact(getBytesCopy(concat([ sig.r, sig.s ]))).toDERRawBytes();