RSA encryption and BSD cryptodev engine


I'm trying to encrypt a string on an embedded system running on linux using OpenSSL. The system uses imx6ul microprocessor. It consists with a hardware crypto engine.

root@imx6ulevk:/# openssl version
OpenSSL 1.0.2d 9 Jul 2015
root@imx6ulevk:/# openssl engine
(cryptodev) BSD cryptodev engine
(dynamic) Dynamic engine loading support

When I call RSA_public_encrypt() function in my code it gives an error.

root@imx6ulevk:/vp/test# ./RsaEnDc 
cryptodev_digest_update: illegal inputs

And when I remove loading cryptodev driver at the startup of my embedded system and then run the program, it works fine. But I need the cryptodev support for other operations in my system.

Here is my code

void encrypt(RSA* pRsaKey, char* message, int msgLen, char* cipher, int *cipherLen)
    if((*cipherLen = RSA_public_encrypt(msgLen, (unsigned char*)message, (unsigned char*)cipher, pRsaKey, RSA_PKCS1_OAEP_PADDING)) == -1)
        fprintf(stderr, "Error encrypting message: %s\n", ERR_error_string(ERR_get_error(), NULL));

Is there any way to specify RSA_public_encrypt() function not to use cryptodev engine?

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| C   | encryption   | openssl   | rsa   | openssl-engine   2017-01-06 10:01 0 Answers

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