[PATCH 2/5] crypto/openssl: fix output of RSA verify op

[Kusztal, ArkadiuszX]

> -----Original Message-----
> From: Ramkumar Balu <rbalu at marvell.com>
> Sent: Monday, November 29, 2021 10:52 AM
> To: Akhil Goyal <gakhil at marvell.com>; Anoob Joseph <anoobj at marvell.com>;
> Doherty, Declan <declan.doherty at intel.com>; Zhang, Roy Fan
> <roy.fan.zhang at intel.com>; Ankur Dwivedi <adwivedi at marvell.com>; Tejasree
> Kondoj <ktejasree at marvell.com>
> Cc: stable at dpdk.org; dev at dpdk.org; Ramkumar <rbalu at marvell.com>
> Subject: [PATCH 2/5] crypto/openssl: fix output of RSA verify op
> 
> From: Ramkumar <rbalu at marvell.com>
> 
> During RSA verify, the OpenSSL PMD fails to return the plaintext after public key
> decryption.
> This patch fixes the OpenSSL PMD to return the decrypted plaintext in
> cipher.data / cipher.length fields
> 
> Fixes: 3e9d6bd447fb ("crypto/openssl: add RSA and mod asym operations")
> Fixes: fe1606e0138c ("crypto/openssl: fix RSA verify operation")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Ramkumar <rbalu at marvell.com>
> ---
>  drivers/crypto/openssl/rte_openssl_pmd.c | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/crypto/openssl/rte_openssl_pmd.c
> b/drivers/crypto/openssl/rte_openssl_pmd.c
> index 5794ed8159..3ab2c3b5c1 100644
> --- a/drivers/crypto/openssl/rte_openssl_pmd.c
> +++ b/drivers/crypto/openssl/rte_openssl_pmd.c
> @@ -1953,12 +1953,16 @@ process_openssl_rsa_op(struct rte_crypto_op
> *cop,
>  		break;
> 
>  	case RTE_CRYPTO_ASYM_OP_VERIFY:
> -		tmp = rte_malloc(NULL, op->rsa.sign.length, 0);
> +		tmp = op->rsa.cipher.data;
>  		if (tmp == NULL) {
> -			OPENSSL_LOG(ERR, "Memory allocation failed");
> -			cop->status = RTE_CRYPTO_OP_STATUS_ERROR;
> -			break;
> +			tmp = rte_malloc(NULL, op->rsa.sign.length, 0);
> +			if (tmp == NULL) {
> +				OPENSSL_LOG(ERR, "Memory allocation
> failed");
> +				cop->status =
> RTE_CRYPTO_OP_STATUS_ERROR;
> +				break;
> +			}
>  		}
> +
>  		ret = RSA_public_decrypt(op->rsa.sign.length,
>  				op->rsa.sign.data,
>  				tmp,
[Arek] - this function is deprecated and more importantly it properly handle only NO_PADDING situation (no der encoding, like pre TLS 1.2). OpenSSL code needs major refactor in this area soon (mostly in asymmetric crypto).
> @@ -1974,7 +1978,9 @@ process_openssl_rsa_op(struct rte_crypto_op *cop,
>  			OPENSSL_LOG(ERR, "RSA sign Verification failed");
>  			cop->status = RTE_CRYPTO_OP_STATUS_ERROR;
>  		}
> -		rte_free(tmp);
> +		op->rsa.cipher.length = ret;
> +		if (tmp != op->rsa.cipher.data)
> +			rte_free(tmp);
>  		break;
> 
>  	default:
> --
> 2.17.1