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fix(auth): handle malformed key backup JSON #183

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fix(auth): handle malformed key backup JSON #183

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9 changes: 8 additions & 1 deletion src/app/api/auth/key-backup/route.js
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Original file line number Diff line number Diff line change
Expand Up @@ -147,7 +147,14 @@ export async function PUT(request) {
return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
}

const { encrypted_keys } = await request.json();
let body;
try {
body = await request.json();
} catch {
return NextResponse.json({ error: 'Invalid JSON body' }, { status: 400 });
}

const { encrypted_keys } = body;

if (!encrypted_keys || typeof encrypted_keys !== 'string') {
return NextResponse.json({ error: 'Missing or invalid encrypted_keys' }, { status: 400 });
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13 changes: 13 additions & 0 deletions src/app/api/auth/key-backup/route.test.js
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Expand Up @@ -108,4 +108,17 @@ describe('key backup cookie authentication', () => {
expect(response.status).toBe(200);
expect(mocks.authGetUser).toHaveBeenCalledWith('cookie-token');
});

it('returns 400 for malformed JSON instead of a generic 500', async () => {
const { PUT } = await import('./route.js');
const response = await PUT({
headers: new Headers({ authorization: 'Bearer access-token' }),
json: vi.fn().mockRejectedValue(new SyntaxError('Unexpected token'))
});
const body = await response.json();

expect(response.status).toBe(400);
expect(body.error).toBe('Invalid JSON body');
expect(mocks.serviceFrom).not.toHaveBeenCalled();
});
});
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