Adds smaller seq num assert

aws · Jul 9, 2024 · 34dd912 · 34dd912
1 parent 246bd94
commit 34dd912
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/crypto/cipher_extra/aead_test.cc b/crypto/cipher_extra/aead_test.cc
@@ -1393,6 +1393,12 @@ TEST(AEADTest, TestMonotonicityCheck) {
                                     sizeof(ciphertext), nonce, sizeof(nonce), plaintext,
                                     sizeof(plaintext), nullptr /* ad */, 0));
     }
+
+    // Attempting to encrypt with a decreased sequence number causes the monotonicity check to fail.
+    nonce[last_byte] = 0;
+    ASSERT_FALSE(EVP_AEAD_CTX_seal(encrypt_ctx.get(), ciphertext, &out_len,
+                               sizeof(ciphertext), nonce, sizeof(nonce), plaintext,
+                               sizeof(plaintext), nullptr /* ad */, 0));
   }
 }