how to use crypto openssl PMD for asymmetric encryption and decryption

[Balakrishnan K]

Hi Arek,
   Thanks for quick response.
I am using resulted output vector to verify the encrypted message.

I thought the encrypted data will be in the asym_op->rsa.message.data after rte_cryptodev_enqueue_burst and rte_cryptodev_enqueue_burst call with operation type RTE_CRYPTO_ASYM_OP_ENCRYPT.

So ,I checked the hex_dump of asym_op->rsa.message.data.



Code snippet:

asym_op = result_op->asym;

debug_hexdump(stdout, "encrypted message", asym_op->rsa.message.data,

                      asym_op->rsa.message.length);







Encrypted data will be placed in asym_op->rsa.cipher.data after crypto operation is my understanding is correct ?

I should use

debug_hexdump(stdout, "encrypted message", asym_op->rsa.cipher.data,

                      asym_op->rsa.cipher.length);

to check the encrypted message for the input given?





Regards,

Bala



From: Kusztal, ArkadiuszX <arkadiuszx.kusztal at intel.com>
Sent: 23 May 2022 18:15
To: Balakrishnan K <Balakrishnan.K1 at tatacommunications.com>; users at dpdk.org
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption


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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 at tatacommunications.com<mailto:Balakrishnan.K1 at tatacommunications.com>>
Sent: Monday, May 23, 2022 1:33 PM
To: users at dpdk.org<mailto:users at 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
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