From 90ba6ce264e8ad0ae984e22c172e2267ab2eb4b7 Mon Sep 17 00:00:00 2001 From: jmestwa-coder Date: Sat, 20 Jun 2026 21:23:30 +0530 Subject: reject oversized received array in pdf417 ErrorCorrection.decode (#2097) --- .../zxing/pdf417/decoder/ec/ErrorCorrectionTestCase.java | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'core/src/test/java/com/google') diff --git a/core/src/test/java/com/google/zxing/pdf417/decoder/ec/ErrorCorrectionTestCase.java b/core/src/test/java/com/google/zxing/pdf417/decoder/ec/ErrorCorrectionTestCase.java index 7af2ae815..cad628a4c 100644 --- a/core/src/test/java/com/google/zxing/pdf417/decoder/ec/ErrorCorrectionTestCase.java +++ b/core/src/test/java/com/google/zxing/pdf417/decoder/ec/ErrorCorrectionTestCase.java @@ -84,6 +84,21 @@ public final class ErrorCorrectionTestCase extends AbstractErrorCorrectionTestCa } } + @Test + public void testOversizedReceived() { + // A received array longer than the field would index past the exponent table + // during erasure handling; it must be rejected instead of throwing AIOOBE. + int[] received = new int[ModulusGF.PDF417_GF.getSize() + 1]; + System.arraycopy(PDF417_TEST_WITH_EC, 0, received, 0, PDF417_TEST_WITH_EC.length); + received[10] = (received[10] + 1) % ModulusGF.PDF417_GF.getSize(); // force a non-zero syndrome + try { + ec.decode(received, ECC_BYTES, new int[] {0}); + fail("Should not have decoded"); + } catch (ChecksumException ce) { + // good + } + } + private void checkDecode(int[] received) throws ChecksumException { checkDecode(received, new int[0]); } -- cgit v1.2.3