OpenSSL dynamic engine loading shows error

[Shariful Alam]

Hello,

I have a simple rsa engine code (from engines/e_dasync.c). My code
compiles. Command "*$openssl engine -t -c*" shows the following,


 openssl engine -t -c

(rdrand) Intel RDRAND engine

 [RAND]

     [ available ]

(dynamic) Dynamic engine loading support

     [ unavailable ]

(dasync) Dummy Async engine support

 [RSA]

     [ available ]


I also modify *openssl.cnf* configuration as following to load this engine,


openssl_conf = openssl_def


[openssl_def]

engines = engine_section


[engine_section]

rsa-engine-new = rsa_section


[rsa_section]

engine_id = rsa-engine-new


Then when I run the command "$*openssl engine*", I get the following error,

$openssl engine

(rdrand) Intel RDRAND engine

(dynamic) Dynamic engine loading support

(dasync) Dummy Async engine support

139633213376256:error:260AB089:engine
routines:ENGINE_ctrl_cmd_string:invalid cmd
name:crypto/engine/eng_ctrl.c:255:

139633213376256:error:260BC066:engine routines:int_engine_configure:engine
configuration error:crypto/engine/eng_cnf.c:141:section=rsa_section,
name=oid_section, value=new_oids

139633213376256:error:0E07606D:configuration file
routines:module_run:module initialization
error:crypto/conf/conf_mod.c:177:module=engines, value=engine_section,
retcode=-1


Any help why is this happening? How can I fix this?

My goal is to use my OpenSSL engine with Apache for mod_ssl. Do I have to
compile my engine with the OpenSSL source code to do that?


Here is the complete source code of my sample engine,

==============================================


#include <stdio.h>

#include <string.h>


#include <openssl/engine.h>

#include <openssl/sha.h>

#include <openssl/aes.h>

#include <openssl/rsa.h>

#include <openssl/evp.h>

#include <openssl/async.h>

#include <openssl/bn.h>

#include <openssl/crypto.h>

#include <openssl/ssl.h>

#include <openssl/modes.h>


/* Engine Id and Name */

static const char *engine_dasync_id = "dasync";

static const char *engine_dasync_name = "Dummy Async engine support";


static int dasync_pub_enc(int flen, const unsigned char *from,

                    unsigned char *to, RSA *rsa, int padding) {

printf("dasync_pub_enc\n");



return 0;

}


static int dasync_pub_dec(int flen, const unsigned char *from,

                    unsigned char *to, RSA *rsa, int padding) {

printf("dasync_pub_dec\n");



return 0;

}


static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding){

     printf("dasync_rsa_priv_enc\n");

return 0;

}


static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding){

printf("dasync_rsa_priv_dec\n");

return 0;

}



static RSA_METHOD *dasync_rsa_method = NULL;



static int bind_dasync(ENGINE *e){

    /* Setup RSA_METHOD */

    if ((dasync_rsa_method = RSA_meth_new("Dummy Async RSA method", 0)) ==
NULL

        || RSA_meth_set_pub_enc(dasync_rsa_method, dasync_pub_enc) == 0

        || RSA_meth_set_pub_dec(dasync_rsa_method, dasync_pub_dec) == 0

        || RSA_meth_set_priv_enc(dasync_rsa_method, dasync_rsa_priv_enc) ==
0

        || RSA_meth_set_priv_dec(dasync_rsa_method, dasync_rsa_priv_dec) ==
0

) {


        return 0;

    }


    /* Ensure the dasync error handling is set up */



    if (!ENGINE_set_id(e, engine_dasync_id)

        || !ENGINE_set_name(e, engine_dasync_name)

        || !ENGINE_set_RSA(e, dasync_rsa_method)

        ) {

        return 0;

    }

    return 1;

}


static int bind_helper(ENGINE *e, const char *id){

    if (!bind_dasync(e)){

printf("2_Error: Inside Bind helper\n");

        return 0;

}

    return 1;

}


IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)

IMPLEMENT_DYNAMIC_CHECK_FN()


=============================================





Thanks,

Shariful
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