Hi Bala,

Ciphertext will be written into asym_op->rsa.cipher.data (not message.data) by the PMD, here you are using same address for both hex dumps.

Although there is a bug in debug_hexdump in this function which may cause this confusion.

Plus, the test you are referring is PWCT test (Pairwise conditional test) -> it will encrypt, then decrypt.

Please take a look into this comment in queue_ops_rsa_enc_dec function:

/* Use the resulted output as decryption Input vector*

So above this line there is an encryption part.

Below is decryption.          

Regards,

Arek

From: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>
Sent: Monday, May 23, 2022 1:33 PM
To: users@dpdk.org
Subject: how to use crypto openssl PMD for asymmetric encryption and decryption

Hi All,

   I am new to dpdk. Planning to use openssl crypto PMD for encrypting/decrypting  the packets.

Couldn’t find much documents on openssl PMD for asymmetric encryption/decryption.

Any one please point me in the right document.

I have tried to run the test cases wrote for asymmetric crypto using openssl virtual PMD.

But the output of particular test case is same after the encryption done.

File : app/test/test_cryptodev_asym.c

Test executable: ./app/test/dpdk-test

Test case : test_rsa_enc_dec

Input given to encryption:              

message at [0x1894e60], len=20

00000000: F8 BA 1A 55 D0 2F 85 AE 96 7B B6 2F B6 CD A8 EB | ...U./...{./....

00000010: 7E 78 A0 50                                     | ~x.P

After processing the output also looks like same :

encrypted message exist at [0x1894e60], len=20

00000000: F8 BA 1A 55 D0 2F 85 AE 96 7B B6 2F B6 CD A8 EB | ...U./...{./....

00000010: 7E 78 A0 50

Regards,

Bala