From 71afcbd6d59307b039ff02c7c2fd152fc6bfcec5 Mon Sep 17 00:00:00 2001
From: Egor Tensin <egor@tensin.name>
Date: Tue, 23 Jun 2026 11:47:46 +0200
Subject: test: add comments with sources

---
 test/cavp.py | 4 ++++
 test/nist.py | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/test/cavp.py b/test/cavp.py
index 86486ed..42998d9 100755
--- a/test/cavp.py
+++ b/test/cavp.py
@@ -5,6 +5,10 @@
 # For details, see https://github.com/egor-tensin/aes-tools.
 # Distributed under the MIT License.
 
+# This uses the CAVP (Cryptographic Algorithm Validation Program) "Known Answer
+# Test Vectors". The .zip archive can be downloaded from the program's page:
+# https://csrc.nist.gov/projects/cryptographic-algorithm-validation-program/block-ciphers#AES
+
 import argparse
 from collections import OrderedDict
 from collections.abc import MutableSequence
diff --git a/test/nist.py b/test/nist.py
index 274cbbc..d9b0477 100755
--- a/test/nist.py
+++ b/test/nist.py
@@ -13,6 +13,9 @@ import sys
 
 from toolkit import Algorithm, BlockInput, Mode, Tools
 
+# The data is from "Example Vectors for Modes of Operation of the AES":
+# https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf
+
 _TEST_PLAINTEXTS = [
     "6bc1bee22e409f96e93d7e117393172a",
     "ae2d8a571e03ac9c9eb76fac45af8e51",
-- 
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