RE: how to use crypto openssl PMD for asymmetric encryption and decryption

[Balakrishnan K <Balakrishnan.K1@tatacommunications.com>]

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Hi Arek,
    Thanks for your inputs.
I wrote the sample application to encrypt the text from a file also decrypting the same.
Now next step is to encrypt the incoming packets.
I have one basic doubt. During rte_cryptodev_enqueue_burst call with operation type as RTE_CRYPTO_ASYM_OP_ENCRYPT.
For the incoming packet.
what is being encrypted ,Is it entire packet or the payload(data section) ?

Regards,
Bala

From: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com>
Sent: 25 May 2022 16:13
To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>; users@dpdk.org
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption

Hi Bala,

To fill the below struct do I need to extract Publickey exponent , Private key exponent etc.
[Arek] - yes, you need to convert keys into big-endian unsigned integer.
In the file "test_cryptodev_rsa_test_vectors.h" there are few examples.

Regards,
Arek


From: Balakrishnan K <Balakrishnan.K1@tatacommunications.com<mailto:Balakrishnan.K1@tatacommunications.com>>
Sent: Wednesday, May 25, 2022 12:08 PM
To: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com<mailto:arkadiuszx.kusztal@intel.com>>; users@dpdk.org<mailto:users@dpdk.org>
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption

Hi Arek,
    I have public and private key with me which can be used for encryption/decryption.

To fill the below struct do I need to extract Publickey exponent , Private key exponent etc.
The reason why I am asking is, in openssl for encryption we will use key directly with the exposed API.
Example :

RSA_private_encrypt(strlen(msg), (unsigned char *)msg, encrypted, rsa, RSA_PKCS1_PADDING);

Here in dpdk the rsa struct looks different .

Thanks in advance.

struct rte_crypto_rsa_xform {
rte_crypto_param n;
        /**< n - Modulus
         * Modulus data of RSA operation in Octet-string network
         * byte order format.
         */

        rte_crypto_param e;
        /**< e - Public key exponent
         * Public key exponent used for RSA public key operations in Octet-
         * string network byte order format.
         */

        enum rte_crypto_rsa_priv_key_type key_type;

        __extension__
        union {
                rte_crypto_param d;
                /**< d - Private key exponent
                 * Private key exponent used for RSA
                 * private key operations in
                 * Octet-string  network byte order format.
                 */

                struct rte_crypto_rsa_priv_key_qt qt;
                /**< qt - Private key in quintuple format */
        };
};


Regards,
Bala
From: Balakrishnan K
Sent: 24 May 2022 17:42
To: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com<mailto:arkadiuszx.kusztal@intel.com>>; users@dpdk.org<mailto:users@dpdk.org>
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption

Hi Arek,
  Thanks for the detailed explanation.

Regards,
Bala

From: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com<mailto:arkadiuszx.kusztal@intel.com>>
Sent: 24 May 2022 14:44
To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com<mailto:Balakrishnan.K1@tatacommunications.com>>; users@dpdk.org<mailto:users@dpdk.org>
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption


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?

Yes, currently it works this way. The same way output for decryption will be placed in asym_op->rsa.message.data and input in asym_op->rsa.cipher.data.
More explanations can be found in rte_crypto_asym.h file
https://doc.dpdk.org/api/structrte__crypto__rsa__op__param.html<https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoc.dpdk.org%2Fapi%2Fstructrte__crypto__rsa__op__param.html&data=05%7C01%7CBalakrishnan.K1%40tatacommunications.com%7C3a00e82fda1f4e4361d608da3e3b68ce%7C202104622c5e4ec8b3e20be950f292ca%7C0%7C0%7C637890722156534932%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FOGQ02xIA2CRyxMx5evOMmXtP8LTPs4BECzhIy%2B6Adw%3D&reserved=0>.

From: Balakrishnan K <Balakrishnan.K1@tatacommunications.com<mailto:Balakrishnan.K1@tatacommunications.com>>
Sent: Tuesday, May 24, 2022 7:24 AM
To: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com<mailto:arkadiuszx.kusztal@intel.com>>; users@dpdk.org<mailto:users@dpdk.org>
Subject: RE: how to use crypto openssl PMD for asymmetric encryption and decryption

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@intel.com<mailto:arkadiuszx.kusztal@intel.com>>
Sent: 23 May 2022 18:15
To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com<mailto:Balakrishnan.K1@tatacommunications.com>>; users@dpdk.org<mailto:users@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@tatacommunications.com<mailto:Balakrishnan.K1@tatacommunications.com>>
Sent: Monday, May 23, 2022 1:33 PM
To: users@dpdk.org<mailto: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

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