RSA OAEP SHA2 vector creation
=============================
This page documents the code that was used to generate the RSA OAEP SHA2
test vectors as well as code used to verify them against another
implementation.
Creation
--------
``cryptography`` was modified to allow the use of SHA2 in OAEP encryption. Then
the following python script was run to generate the vector files.
.. literalinclude:: /development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py
Download link: :download:`generate_rsa_oaep_sha2.py
</development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py>`
Verification
------------
A Java 8 program was written using `Bouncy Castle`_ to load and verify the test
vectors.
.. literalinclude:: /development/custom-vectors/rsa-oaep-sha2/VerifyRSAOAEPSHA2.java
Download link: :download:`VerifyRSAOAEPSHA2.java
</development/custom-vectors/rsa-oaep-sha2/VerifyRSAOAEPSHA2.java>`
Using the Verifier
------------------
Download and install the `Java SDK`_. Initial verification was performed
using ``jdk-8u77-macosx-x64.dmg``.
Download the latest `Bouncy Castle`_ JAR. Initial verification was performed
using ``bcprov-jdk15on-154.jar``.
Set the ``-classpath`` to include the Bouncy Castle jar and the path to
``VerifyRSAOAEPSHA2.java`` and compile the program.
.. code-block:: console
$ javac -classpath ~/Downloads/bcprov-jdk15on-154.jar:./ VerifyRSAOAEPSHA2.java
Finally, run the program with the path to the SHA-2 vectors:
.. code-block:: console
$ java -classpath ~/Downloads/bcprov-jdk15on-154.jar:./ VerifyRSAOAEPSHA2
.. _`Bouncy Castle`: https://www.bouncycastle.org/
.. _`Java SDK`: https://www.oracle.com/java/technologies/javase-downloads.html
Generated by dwww version 1.15 on Wed May 22 21:41:03 CEST 2024.