status-im/c-kzg-4844
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Do not allow blob fields to overflow

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dancoffman 2022-12-12 14:48:05 -08:00
parent 0f54189400
commit e5338b771f
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GPG Key ID: 47B1F53E36A9B3CC
1 changed files with 14 additions and 3 deletions
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17
bindings/node.js/test.ts
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@ -20,7 +20,19 @@ const SETUP_FILE_PATH = existsSync(setupFileName)
const BLOB_BYTE_COUNT = FIELD_ELEMENTS_PER_BLOB * BYTES_PER_FIELD_ELEMENT;
const generateRandomBlob = () => new Uint8Array(randomBytes(BLOB_BYTE_COUNT));
const MAX_TOP_BYTE = 114;
const generateRandomBlob = () => {
return new Uint8Array(
randomBytes(BLOB_BYTE_COUNT).map((x, i) => {
// Set the top byte to be low enough that the field element doesn't overflow the BLS modulus
if (x > MAX_TOP_BYTE && i % BYTES_PER_FIELD_ELEMENT == 31) {
return Math.floor(Math.random() * MAX_TOP_BYTE);
}
return x;
}),
);
};
describe("C-KZG", () => {
beforeAll(async () => {
@ -50,8 +62,7 @@ describe("C-KZG", () => {
);
});
// Just don't call verifyAggregateKzgProof when there are no blobs or commitments
it.skip("verifies the aggregate proof of empty blobs and commitments", () => {
it("verifies the aggregate proof of empty blobs and commitments", () => {
expect(verifyAggregateKzgProof([], [], computeAggregateKzgProof([]))).toBe(
true,
);