C++ DSO_free函数代码示例

static int ibmca_finish(ENGINE *e)

        {

        if(ibmca_dso == NULL)

                {

                IBMCAerr(IBMCA_F_IBMCA_FINISH,IBMCA_R_NOT_LOADED);

                return 0;

                }

        release_context(handle);

        if(!DSO_free(ibmca_dso))

                {

                IBMCAerr(IBMCA_F_IBMCA_FINISH,IBMCA_R_DSO_FAILURE);

                return 0;

                }

        ibmca_dso = NULL;



        return 1;

        }

static int ubsec_finish(ENGINE *e)
	{
	free_UBSEC_LIBNAME();
	if(ubsec_dso == NULL)
		{
		UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_NOT_LOADED);
		return 0;
		}
	if(!DSO_free(ubsec_dso))
		{
		UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_DSO_FAILURE);
		return 0;
		}
	ubsec_dso = NULL;
	p_UBSEC_ubsec_bytes_to_bits = NULL;
	p_UBSEC_ubsec_bits_to_bytes = NULL;
	p_UBSEC_ubsec_open = NULL;
	p_UBSEC_ubsec_close = NULL;
#ifndef OPENSSL_NO_DH
	p_UBSEC_diffie_hellman_generate_ioctl = NULL;
	p_UBSEC_diffie_hellman_agree_ioctl = NULL;
#endif
#ifndef OPENSSL_NO_RSA
	p_UBSEC_rsa_mod_exp_ioctl = NULL;
	p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
#endif
#ifndef OPENSSL_NO_DSA
	p_UBSEC_dsa_sign_ioctl = NULL;
	p_UBSEC_dsa_verify_ioctl = NULL;
#endif
	p_UBSEC_math_accelerate_ioctl = NULL;
	p_UBSEC_rng_ioctl = NULL;
        p_UBSEC_max_key_len_ioctl = NULL;
	return 1;
	}

static int surewarehk_finish(ENGINE *e)
{
    int to_return = 1;
    if(surewarehk_dso == NULL)
    {
        SUREWAREerr(SUREWARE_F_SUREWAREHK_FINISH,ENGINE_R_NOT_LOADED);
        to_return = 0;
        goto err;
    }
    p_surewarehk_Finish();
    if(!DSO_free(surewarehk_dso))
    {
        SUREWAREerr(SUREWARE_F_SUREWAREHK_FINISH,ENGINE_R_DSO_FAILURE);
        to_return = 0;
        goto err;
    }
err:
    if (logstream)
        BIO_free(logstream);
    surewarehk_dso = NULL;
    p_surewarehk_Init = NULL;
    p_surewarehk_Finish = NULL;
    p_surewarehk_Rand_Bytes = NULL;
    p_surewarehk_Rand_Seed = NULL;
    p_surewarehk_Load_Privkey = NULL;
    p_surewarehk_Load_Rsa_Pubkey = NULL;
    p_surewarehk_Free = NULL;
    p_surewarehk_Rsa_Priv_Dec = NULL;
    p_surewarehk_Rsa_Sign = NULL;
    p_surewarehk_Dsa_Sign = NULL;
    p_surewarehk_Info_Pubkey = NULL;
    p_surewarehk_Load_Dsa_Pubkey = NULL;
    p_surewarehk_Mod_Exp = NULL;
    return to_return;
}

DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
	{
	DSO *ret;
	int allocated = 0;

	if(dso == NULL)
		{
		ret = DSO_new_method(meth);
		if(ret == NULL)
			{
			DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
			goto err;
			}
		allocated = 1;
		/* Pass the provided flags to the new DSO object */
		if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
			{
			DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
			goto err;
			}
		}
	else
		ret = dso;
	/* Don't load if we're currently already loaded */
	if(ret->filename != NULL)
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_DSO_ALREADY_LOADED);
		goto err;
		}
	/* filename can only be NULL if we were passed a dso that already has
	 * one set. */
	if(filename != NULL)
		if(!DSO_set_filename(ret, filename))
			{
			DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED);
			goto err;
			}
	filename = ret->filename;
	if(filename == NULL)
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME);
		goto err;
		}
	if(ret->meth->dso_load == NULL)
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
		goto err;
		}
	if(!ret->meth->dso_load(ret))
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
		goto err;
		}
	/* Load succeeded */
	return(ret);
err:
	if(allocated)
		DSO_free(ret);
	return(NULL);
	}

void COMP_zlib_cleanup (void)
{
#ifdef ZLIB_SHARED
    if (zlib_dso)
        DSO_free (zlib_dso);
#endif
}

static int ibm_4758_cca_finish(ENGINE *e)
	{
	free_CCA4758_LIB_NAME();
	if(!dso)
		{
		CCA4758err(CCA4758_F_IBM_4758_CCA_FINISH,
				CCA4758_R_NOT_LOADED);
		return 0;
		}
	if(!DSO_free(dso))
		{
		CCA4758err(CCA4758_F_IBM_4758_CCA_FINISH,
				CCA4758_R_UNIT_FAILURE);
		return 0;
		}
	dso = NULL;
#ifndef OPENSSL_NO_RSA
	keyRecordRead = (F_KEYRECORDREAD)0;
	randomNumberGenerate = (F_RANDOMNUMBERGENERATE)0;
	digitalSignatureGenerate = (F_DIGITALSIGNATUREGENERATE)0;
	digitalSignatureVerify = (F_DIGITALSIGNATUREVERIFY)0;
	publicKeyExtract = (F_PUBLICKEYEXTRACT)0;
	pkaEncrypt = (F_PKAENCRYPT)0;
	pkaDecrypt = (F_PKADECRYPT)0;
#endif
	randomNumberGenerate = (F_RANDOMNUMBERGENERATE)0;
	return 1;
	}

static int cluster_labs_finish(ENGINE *e)
{

    if (cluster_labs_dso == NULL) {
        CLerr(CL_F_CLUSTER_LABS_FINISH, CL_R_NOT_LOADED);
        return 0;
    }
    if (!DSO_free(cluster_labs_dso)) {
        CLerr(CL_F_CLUSTER_LABS_FINISH, CL_R_DSO_FAILURE);
        return 0;
    }

    cluster_labs_dso = NULL;
    p_cl_engine_init = NULL;
    p_cl_mod_exp = NULL;
    p_cl_rsa_mod_exp = NULL;
    p_cl_mod_exp_crt = NULL;
    p_cl_rsa_priv_enc = NULL;
    p_cl_rsa_priv_dec = NULL;
    p_cl_rsa_pub_enc = NULL;
    p_cl_rsa_pub_dec = NULL;
    p_cl_rand_bytes = NULL;
    p_cl_dsa_sign = NULL;
    p_cl_dsa_verify = NULL;

    return (1);

}

static int hwcrhk_finish(ENGINE *e)
	{
	int to_return = 1;
	free_HWCRHK_LIBNAME();
	if(hwcrhk_dso == NULL)
		{
		HWCRHKerr(HWCRHK_F_HWCRHK_FINISH,HWCRHK_R_NOT_LOADED);
		to_return = 0;
		goto err;
		}
	release_context(hwcrhk_context);
	if(!DSO_free(hwcrhk_dso))
		{
		HWCRHKerr(HWCRHK_F_HWCRHK_FINISH,HWCRHK_R_DSO_FAILURE);
		to_return = 0;
		goto err;
		}
 err:
	if (logstream)
		BIO_free(logstream);
	hwcrhk_dso = NULL;
	p_hwcrhk_Init = NULL;
	p_hwcrhk_Finish = NULL;
	p_hwcrhk_ModExp = NULL;
#ifndef OPENSSL_NO_RSA
	p_hwcrhk_RSA = NULL;
	p_hwcrhk_RSALoadKey = NULL;
	p_hwcrhk_RSAGetPublicKey = NULL;
	p_hwcrhk_RSAUnloadKey = NULL;
#endif
	p_hwcrhk_ModExpCRT = NULL;
	p_hwcrhk_RandomBytes = NULL;
	return to_return;
	}

/* (de)initialisation functions. */
static int cswift_init(ENGINE *e)
	{
        SW_CONTEXT_HANDLE hac;
        t_swAcquireAccContext *p1;
        t_swAttachKeyParam *p2;
        t_swSimpleRequest *p3;
        t_swReleaseAccContext *p4;

	if(cswift_dso != NULL)
		{
		CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
		goto err;
		}
	/* Attempt to load libswift.so/swift.dll/whatever. */
	cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
	if(cswift_dso == NULL)
		{
		CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
		goto err;
		}
	if(!(p1 = (t_swAcquireAccContext *)
				DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
			!(p2 = (t_swAttachKeyParam *)
				DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
			!(p3 = (t_swSimpleRequest *)
				DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
			!(p4 = (t_swReleaseAccContext *)
				DSO_bind_func(cswift_dso, CSWIFT_F4)))
		{
		CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
		goto err;
		}
	/* Copy the pointers */
	p_CSwift_AcquireAccContext = p1;
	p_CSwift_AttachKeyParam = p2;
	p_CSwift_SimpleRequest = p3;
	p_CSwift_ReleaseAccContext = p4;
	/* Try and get a context - if not, we may have a DSO but no
	 * accelerator! */
	if(!get_context(&hac))
		{
		CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
		goto err;
		}
	release_context(hac);
	/* Everything's fine. */
	return 1;
err:
	if(cswift_dso)
	{
		DSO_free(cswift_dso);
		cswift_dso = NULL;
	}
	p_CSwift_AcquireAccContext = NULL;
	p_CSwift_AttachKeyParam = NULL;
	p_CSwift_SimpleRequest = NULL;
	p_CSwift_ReleaseAccContext = NULL;
	return 0;
	}

/* (de)initialisation functions. */
static int atalla_init(ENGINE *e)
	{
	tfnASI_GetHardwareConfig *p1;
	tfnASI_RSAPrivateKeyOpFn *p2;
	tfnASI_GetPerformanceStatistics *p3;
	/* Not sure of the origin of this magic value, but Ben's code had it
	 * and it seemed to have been working for a few people. :-) */
	unsigned int config_buf[1024];

	if(atalla_dso != NULL)
		{
		ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_ALREADY_LOADED);
		goto err;
		}
	/* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be
	 * changed unfortunately because the Atalla drivers don't have
	 * standard library names that can be platform-translated well. */
	/* TODO: Work out how to actually map to the names the Atalla
	 * drivers really use - for now a symbollic link needs to be
	 * created on the host system from libatasi.so to atasi.so on
	 * unix variants. */
	atalla_dso = DSO_load(NULL, get_ATALLA_LIBNAME(), NULL, 0);
	if(atalla_dso == NULL)
		{
		ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED);
		goto err;
		}
	if(!(p1 = (tfnASI_GetHardwareConfig *)DSO_bind_func(
				atalla_dso, ATALLA_F1)) ||
			!(p2 = (tfnASI_RSAPrivateKeyOpFn *)DSO_bind_func(
				atalla_dso, ATALLA_F2)) ||
			!(p3 = (tfnASI_GetPerformanceStatistics *)DSO_bind_func(
				atalla_dso, ATALLA_F3)))
		{
		ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED);
		goto err;
		}
	/* Copy the pointers */
	p_Atalla_GetHardwareConfig = p1;
	p_Atalla_RSAPrivateKeyOpFn = p2;
	p_Atalla_GetPerformanceStatistics = p3;
	/* Perform a basic test to see if there's actually any unit
	 * running. */
	if(p1(0L, config_buf) != 0)
		{
		ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_UNIT_FAILURE);
		goto err;
		}
	/* Everything's fine. */
	return 1;
err:
	if(atalla_dso)
		DSO_free(atalla_dso);
	atalla_dso = NULL;
	p_Atalla_GetHardwareConfig = NULL;
	p_Atalla_RSAPrivateKeyOpFn = NULL;
	p_Atalla_GetPerformanceStatistics = NULL;
	return 0;
	}

void comp_zlib_cleanup_int(void)
{
#ifdef ZLIB_SHARED
    if (zlib_dso != NULL)
        DSO_free(zlib_dso);
    zlib_dso = NULL;
#endif
}

int OPENSSL_atexit(void (*handler)(void))
{
    OPENSSL_INIT_STOP *newhand;

#if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE)
    {
        union {
            void *sym;
            void (*func)(void);
        } handlersym;

        handlersym.func = handler;
# ifdef DSO_WIN32
        {
            HMODULE handle = NULL;
            BOOL ret;

            /*
             * We don't use the DSO route for WIN32 because there is a better
             * way
             */
            ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
                                    | GET_MODULE_HANDLE_EX_FLAG_PIN,
                                    handlersym.sym, &handle);

            if (!ret)
                return 0;
        }
# else
        /*
         * Deliberately leak a reference to the handler. This will force the
         * library/code containing the handler to remain loaded until we run the
         * atexit handler. If -znodelete has been used then this is
         * unnecessary.
         */
        {
            DSO *dso = NULL;

            ERR_set_mark();
            dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
            DSO_free(dso);
            ERR_pop_to_mark();
        }
# endif
    }
#endif

    newhand = OPENSSL_malloc(sizeof(*newhand));
    if (newhand == NULL)
        return 0;

    newhand->handler = handler;
    newhand->next = stop_handlers;
    stop_handlers = newhand;

    return 1;
}

static int aep_finish(ENGINE *e)
	{
	int to_return = 0, in_use;
	AEP_RV rv;

	if(aep_dso == NULL)
		{
		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_NOT_LOADED);
		goto err;
		}

	rv = aep_close_all_connections(0, &in_use);
	if (rv != AEP_R_OK)
		{
		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CLOSE_HANDLES_FAILED);
		goto err;
		}
	if (in_use)
		{
		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CONNECTIONS_IN_USE);
		goto err;
		}

	rv = p_AEP_Finalize();
	if (rv != AEP_R_OK)
		{
		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_FINALIZE_FAILED);
		goto err;
		}

	if(!DSO_free(aep_dso))
		{
		AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_UNIT_FAILURE);
		goto err;
		}

	aep_dso = NULL;
	p_AEP_CloseConnection   = NULL;
	p_AEP_OpenConnection    = NULL;
	p_AEP_ModExp            = NULL;
	p_AEP_ModExpCrt         = NULL;
#ifdef AEPRAND
	p_AEP_GenRandom         = NULL;
#endif
	p_AEP_Initialize        = NULL;
	p_AEP_Finalize          = NULL;
	p_AEP_SetBNCallBacks    = NULL;

	to_return = 1;
 err:
	return to_return;
	}

/*
 * Because our ex_data element may or may not get allocated depending on
 * whether a "first-use" occurs before the ENGINE is freed, we have a memory
 * leak problem to solve. We can't declare a "new" handler for the ex_data as
 * we don't want a dynamic_data_ctx in *all* ENGINE structures of all types
 * (this is a bug in the design of CRYPTO_EX_DATA). As such, we just declare
 * a "free" handler and that will get called if an ENGINE is being destroyed
 * and there was an ex_data element corresponding to our context type.
 */
static void dynamic_data_ctx_free_func(void *parent, void *ptr,
                                       CRYPTO_EX_DATA *ad, int idx, long argl,
                                       void *argp)
{
    if (ptr) {
        dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr;
        DSO_free(ctx->dynamic_dso);
        OPENSSL_free(ctx->DYNAMIC_LIBNAME);
        OPENSSL_free(ctx->engine_id);
        sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str);
        OPENSSL_free(ctx);
    }
}

static int nuron_finish(ENGINE *e)
{
    free_NURON_LIBNAME();
    if (pvDSOHandle == NULL) {
        NURONerr(NURON_F_NURON_FINISH, NURON_R_NOT_LOADED);
        return 0;
    }
    if (!DSO_free(pvDSOHandle)) {
        NURONerr(NURON_F_NURON_FINISH, NURON_R_DSO_FAILURE);
        return 0;
    }
    pvDSOHandle = NULL;
    pfnModExp = NULL;
    return 1;
}