cmd-crypto/cryptoadm/adm_kef_ioctl.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
 */

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <locale.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/varargs.h>
#include <zone.h>
#include <sys/crypto/ioctladmin.h>
#include "cryptoadm.h"

#define DEFAULT_DEV_NUM 5
#define DEFAULT_SOFT_NUM 10

static crypto_get_soft_info_t *setup_get_soft_info(char *, int);

/*
 * Prepare the argument for the LOAD_SOFT_CONFIG ioctl call for the
 * provider pointed by pent.  Return NULL if out of memory.
 */
crypto_load_soft_config_t *
setup_soft_conf(entry_t *pent)
{
    crypto_load_soft_config_t   *pload_soft_conf;
    mechlist_t  *plist;
    uint_t      sup_count;
    size_t      extra_mech_size = 0;
    int     i;

    if (pent == NULL) {
        return (NULL);
    }

    sup_count = pent->sup_count;
    if (sup_count > 1) {
        extra_mech_size = sizeof (crypto_mech_name_t) *
            (sup_count - 1);
    }

    pload_soft_conf = malloc(sizeof (crypto_load_soft_config_t) +
        extra_mech_size);
    if (pload_soft_conf == NULL) {
        cryptodebug("out of memory.");
        return (NULL);
    }

    (void) strlcpy(pload_soft_conf->sc_name, pent->name, MAXNAMELEN);
    pload_soft_conf->sc_count = sup_count;

    i = 0;
    plist =  pent->suplist;
    while (i < sup_count) {
        (void) strlcpy(pload_soft_conf->sc_list[i++],
            plist->name, CRYPTO_MAX_MECH_NAME);
        plist = plist->next;
    }

    return (pload_soft_conf);
}


/*
 * Prepare the argument for the LOAD_SOFT_DISABLED ioctl call for the
 * provider pointed by pent.  Return NULL if out of memory.
 */
crypto_load_soft_disabled_t *
setup_soft_dis(entry_t *pent)
{
    crypto_load_soft_disabled_t *pload_soft_dis = NULL;
    mechlist_t  *plist = NULL;
    size_t      extra_mech_size = 0;
    uint_t      dis_count;
    int     i;

    if (pent == NULL) {
        return (NULL);
    }

    dis_count = pent->dis_count;
    if (dis_count > 1) {
        extra_mech_size = sizeof (crypto_mech_name_t) *
            (dis_count - 1);
    }

    pload_soft_dis = malloc(sizeof (crypto_load_soft_disabled_t) +
        extra_mech_size);
    if (pload_soft_dis == NULL) {
        cryptodebug("out of memory.");
        return (NULL);
    }

    (void) strlcpy(pload_soft_dis->sd_name, pent->name, MAXNAMELEN);
    pload_soft_dis->sd_count = dis_count;

    i = 0;
    plist =  pent->dislist;
    while (i < dis_count) {
        (void) strlcpy(pload_soft_dis->sd_list[i++],
            plist->name, CRYPTO_MAX_MECH_NAME);
        plist = plist->next;
    }

    return (pload_soft_dis);
}


/*
 * Prepare the argument for the LOAD_DEV_DISABLED ioctl call for the
 * provider pointed by pent.  Return NULL if out of memory.
 */
crypto_load_dev_disabled_t *
setup_dev_dis(entry_t *pent)
{
    crypto_load_dev_disabled_t  *pload_dev_dis = NULL;
    mechlist_t  *plist = NULL;
    size_t      extra_mech_size = 0;
    uint_t      dis_count;
    int     i;
    char        pname[MAXNAMELEN];
    int     inst_num;

    if (pent == NULL) {
        return (NULL);
    }

    /* get the device name and the instance number */
    if (split_hw_provname(pent->name, pname, &inst_num) == FAILURE) {
        return (NULL);
    }

    /* allocate space for pload_dev_des */
    dis_count = pent->dis_count;
    if (dis_count > 1) {
        extra_mech_size = sizeof (crypto_mech_name_t) *
            (dis_count - 1);
    }

    pload_dev_dis = malloc(sizeof (crypto_load_dev_disabled_t) +
        extra_mech_size);
    if (pload_dev_dis == NULL) {
        cryptodebug("out of memory.");
        return (NULL);
    }

    /* set the values for pload_dev_dis */
    (void) strlcpy(pload_dev_dis->dd_dev_name, pname, MAXNAMELEN);
    pload_dev_dis->dd_dev_instance = inst_num;
    pload_dev_dis->dd_count = dis_count;

    i = 0;
    plist =  pent->dislist;
    while (i < dis_count) {
        (void) strlcpy(pload_dev_dis->dd_list[i++],
            plist->name, CRYPTO_MAX_MECH_NAME);
        plist = plist->next;
    }

    return (pload_dev_dis);
}


/*
 * Prepare the calling argument of the UNLOAD_SOFT_MODULE ioctl call for the
 * provider pointed by pent.  Return NULL if out of memory.
 */
crypto_unload_soft_module_t *
setup_unload_soft(entry_t *pent)
{
    crypto_unload_soft_module_t *punload_soft;

    if (pent == NULL) {
        return (NULL);
    }

    punload_soft = malloc(sizeof (crypto_unload_soft_module_t));
    if (punload_soft == NULL) {
        cryptodebug("out of memory.");
        return (NULL);
    }

    (void) strlcpy(punload_soft->sm_name, pent->name, MAXNAMELEN);

    return (punload_soft);
}


/*
 * Prepare the calling argument for the GET_SOFT_INFO call for the provider
 * with the number of mechanisms specified in the second argument.
 *
 * Called by get_soft_info().
 */
static crypto_get_soft_info_t *
setup_get_soft_info(char *provname, int count)
{
    crypto_get_soft_info_t  *psoft_info;
    size_t          extra_mech_size = 0;

    if (provname == NULL) {
        return (NULL);
    }

    if (count > 1) {
        extra_mech_size = sizeof (crypto_mech_name_t) * (count - 1);
    }

    psoft_info = malloc(sizeof (crypto_get_soft_info_t) + extra_mech_size);
    if (psoft_info == NULL) {
        cryptodebug("out of memory.");
        return (NULL);
    }

    (void) strlcpy(psoft_info->si_name, provname, MAXNAMELEN);
    psoft_info->si_count = count;

    return (psoft_info);
}


/*
 * Get the device list from kernel.
 */
int
get_dev_list(crypto_get_dev_list_t **ppdevlist)
{
    crypto_get_dev_list_t   *pdevlist;
    int         fd = -1;
    int         count = DEFAULT_DEV_NUM;

    pdevlist = malloc(sizeof (crypto_get_dev_list_t) +
        sizeof (crypto_dev_list_entry_t) * (count - 1));
    if (pdevlist == NULL) {
        cryptodebug("out of memory.");
        return (FAILURE);
    }

    if ((fd = open(ADMIN_IOCTL_DEVICE, O_RDONLY)) == -1) {
        cryptoerror(LOG_STDERR, gettext("failed to open %s: %s"),
            ADMIN_IOCTL_DEVICE, strerror(errno));
        return (FAILURE);
    }

    pdevlist->dl_dev_count = count;
    if (ioctl(fd, CRYPTO_GET_DEV_LIST, pdevlist) == -1) {
        cryptodebug("CRYPTO_GET_DEV_LIST ioctl failed: %s",
            strerror(errno));
        free(pdevlist);
        (void) close(fd);
        return (FAILURE);
    }

    /* BUFFER is too small, get the number of devices and retry it. */
    if (pdevlist->dl_return_value == CRYPTO_BUFFER_TOO_SMALL) {
        count = pdevlist->dl_dev_count;
        free(pdevlist);
        pdevlist = malloc(sizeof (crypto_get_dev_list_t) +
            sizeof (crypto_dev_list_entry_t) * (count - 1));
        if (pdevlist == NULL) {
            cryptodebug("out of memory.");
            (void) close(fd);
            return (FAILURE);
        }

        if (ioctl(fd, CRYPTO_GET_DEV_LIST, pdevlist) == -1) {
            cryptodebug("CRYPTO_GET_DEV_LIST ioctl failed: %s",
                strerror(errno));
            free(pdevlist);
            (void) close(fd);
            return (FAILURE);
        }
    }

    if (pdevlist->dl_return_value != CRYPTO_SUCCESS) {
        cryptodebug("CRYPTO_GET_DEV_LIST ioctl failed, "
            "return_value = %d", pdevlist->dl_return_value);
        free(pdevlist);
        (void) close(fd);
        return (FAILURE);
    }

    *ppdevlist = pdevlist;
    (void) close(fd);
    return (SUCCESS);
}


/*
 * Get all the mechanisms supported by the hardware provider.
 * The result will be stored in the second argument.
 */
int
get_dev_info(char *devname, int inst_num, int count, mechlist_t **ppmechlist)
{
    crypto_get_dev_info_t   *dev_info;
    mechlist_t  *phead;
    mechlist_t  *pcur;
    mechlist_t  *pmech;
    int     fd = -1;
    int     i;
    int     rc;

    if (devname == NULL || count < 1) {
        cryptodebug("get_dev_info(): devname is NULL or bogus count");
        return (FAILURE);
    }

    /* Set up the argument for the CRYPTO_GET_DEV_INFO ioctl call */
    dev_info = malloc(sizeof (crypto_get_dev_info_t) +
        sizeof (crypto_mech_name_t) * (count - 1));
    if (dev_info == NULL) {
        cryptodebug("out of memory.");
        return (FAILURE);
    }
    (void) strlcpy(dev_info->di_dev_name, devname, MAXNAMELEN);
    dev_info->di_dev_instance = inst_num;
    dev_info->di_count = count;

    /* Open the ioctl device */
    if ((fd = open(ADMIN_IOCTL_DEVICE, O_RDONLY)) == -1) {
        cryptoerror(LOG_STDERR, gettext("failed to open %s: %s"),
            ADMIN_IOCTL_DEVICE, strerror(errno));
        free(dev_info);
        return (FAILURE);
    }

    if (ioctl(fd, CRYPTO_GET_DEV_INFO, dev_info) == -1) {
        cryptodebug("CRYPTO_GET_DEV_INFO ioctl failed: %s",
            strerror(errno));
        free(dev_info);
        (void) close(fd);
        return (FAILURE);
    }

    if (dev_info->di_return_value != CRYPTO_SUCCESS) {
        cryptodebug("CRYPTO_GET_DEV_INFO ioctl failed, "
            "return_value = %d", dev_info->di_return_value);
        free(dev_info);
        (void) close(fd);
        return (FAILURE);
    }

    phead = pcur = NULL;
    rc = SUCCESS;
    for (i = 0; i < dev_info->di_count; i++) {
        pmech = create_mech(&dev_info->di_list[i][0]);
        if (pmech == NULL) {
            rc = FAILURE;
            break;
        } else {
            if (phead == NULL) {
                phead = pcur = pmech;
            } else {
                pcur->next = pmech;
                pcur = pmech;
            }
        }
    }

    if (rc == SUCCESS) {
        *ppmechlist = phead;
    } else {
        free_mechlist(phead);
    }

    free(dev_info);
    (void) close(fd);
    return (rc);
}


/*
 * Get the supported mechanism list of the software provider from kernel.
 *
 * Parameters phardlist and psoftlist are supplied by get_kcfconf_info().
 * If NULL, this function calls get_kcfconf_info() internally.
 */
int
get_soft_info(char *provname, mechlist_t **ppmechlist,
    entrylist_t *phardlist, entrylist_t *psoftlist)
{
    boolean_t       in_kernel = B_FALSE;
    crypto_get_soft_info_t  *psoft_info;
    mechlist_t      *phead;
    mechlist_t      *pmech;
    mechlist_t      *pcur;
    entry_t         *pent = NULL;
    int         count;
    int         fd = -1;
    int         rc;
    int         i;

    if (provname == NULL) {
        return (FAILURE);
    }

    if (getzoneid() == GLOBAL_ZONEID) {
        /* use kcf.conf for kernel software providers in global zone */
        if ((pent = getent_kef(provname, phardlist, psoftlist)) ==
            NULL) {

            /* No kcf.conf entry for this provider */
            if (check_kernel_for_soft(provname, NULL, &in_kernel)
                == FAILURE) {
                return (FAILURE);
            } else if (in_kernel == B_FALSE) {
                cryptoerror(LOG_STDERR,
                    gettext("%s does not exist."), provname);
                return (FAILURE);
            }

            /*
             * Set mech count to 1.  It will be reset to the
             * correct value later if the setup buffer is too small.
             */
            count = 1;
        } else {
            count = pent->sup_count;
            free_entry(pent);
        }
    } else {
        /*
         * kcf.conf not there in non-global zone: set mech count to 1.
         * It will be reset to the correct value later if the setup
         * buffer is too small.
         */
        count = 1;
    }

    if ((psoft_info = setup_get_soft_info(provname, count)) == NULL) {
        return (FAILURE);
    }

    if ((fd = open(ADMIN_IOCTL_DEVICE, O_RDONLY)) == -1) {
        cryptoerror(LOG_STDERR, gettext("failed to open %s: %s"),
            ADMIN_IOCTL_DEVICE, strerror(errno));
        free(psoft_info);
        return (FAILURE);
    }

    /* make GET_SOFT_INFO ioctl call */
    if ((rc = ioctl(fd, CRYPTO_GET_SOFT_INFO, psoft_info)) == -1) {
        cryptodebug("CRYPTO_GET_SOFT_INFO ioctl failed: %s",
            strerror(errno));
        (void) close(fd);
        free(psoft_info);
        return (FAILURE);
    }

    /* BUFFER is too small, get the number of mechanisms and retry it. */
    if (psoft_info->si_return_value == CRYPTO_BUFFER_TOO_SMALL) {
        count = psoft_info->si_count;
        free(psoft_info);
        if ((psoft_info = setup_get_soft_info(provname, count))
            == NULL) {
            (void) close(fd);
            return (FAILURE);
        } else {
            rc = ioctl(fd, CRYPTO_GET_SOFT_INFO, psoft_info);
            if (rc == -1) {
                cryptodebug("CRYPTO_GET_SOFT_INFO ioctl "
                    "failed: %s", strerror(errno));
                (void) close(fd);
                free(psoft_info);
                return (FAILURE);
            }
        }
    }

    (void) close(fd);
    if (psoft_info->si_return_value != CRYPTO_SUCCESS) {
        cryptodebug("CRYPTO_GET_SOFT_INFO ioctl failed, "
            "return_value = %d", psoft_info->si_return_value);
        free(psoft_info);
        return (FAILURE);
    }


    /* Build the mechanism linked list and return it */
    rc = SUCCESS;
    phead = pcur = NULL;
    for (i = 0; i < psoft_info->si_count; i++) {
        pmech = create_mech(&psoft_info->si_list[i][0]);
        if (pmech == NULL) {
            rc = FAILURE;
            break;
        } else {
            if (phead == NULL) {
                phead = pcur = pmech;
            } else {
                pcur->next = pmech;
                pcur = pmech;
            }
        }
    }

    if (rc == FAILURE) {
        free_mechlist(phead);
    } else {
        *ppmechlist = phead;
    }

    free(psoft_info);
    return (rc);
}


/*
 * Get the kernel software provider list from kernel.
 */
int
get_soft_list(crypto_get_soft_list_t **ppsoftlist)
{
    crypto_get_soft_list_t *psoftlist = NULL;
    int count = DEFAULT_SOFT_NUM;
    int len;
    int fd = -1;

    if ((fd = open(ADMIN_IOCTL_DEVICE, O_RDONLY)) == -1) {
        cryptoerror(LOG_STDERR, gettext("failed to open %s: %s"),
            ADMIN_IOCTL_DEVICE, strerror(errno));
        return (FAILURE);
    }

    len = MAXNAMELEN * count;
    psoftlist = malloc(sizeof (crypto_get_soft_list_t) + len);
    if (psoftlist == NULL) {
        cryptodebug("out of memory.");
        (void) close(fd);
        return (FAILURE);
    }
    psoftlist->sl_soft_names = (caddr_t)(psoftlist + 1);
    psoftlist->sl_soft_count = count;
    psoftlist->sl_soft_len = len;

    if (ioctl(fd, CRYPTO_GET_SOFT_LIST, psoftlist) == -1) {
        cryptodebug("CRYPTO_GET_SOFT_LIST ioctl failed: %s",
            strerror(errno));
        free(psoftlist);
        (void) close(fd);
        return (FAILURE);
    }

    /*
     * if BUFFER is too small, get the number of software providers and
     * the minimum length needed for names and length and retry it.
     */
    if (psoftlist->sl_return_value == CRYPTO_BUFFER_TOO_SMALL) {
        count = psoftlist->sl_soft_count;
        len = psoftlist->sl_soft_len;
        free(psoftlist);
        psoftlist = malloc(sizeof (crypto_get_soft_list_t) + len);
        if (psoftlist == NULL) {
            cryptodebug("out of memory.");
            (void) close(fd);
            return (FAILURE);
        }
        psoftlist->sl_soft_names = (caddr_t)(psoftlist + 1);
        psoftlist->sl_soft_count = count;
        psoftlist->sl_soft_len = len;

        if (ioctl(fd, CRYPTO_GET_SOFT_LIST, psoftlist) == -1) {
            cryptodebug("CRYPTO_GET_SOFT_LIST ioctl failed:"
                "%s", strerror(errno));
            free(psoftlist);
            (void) close(fd);
            return (FAILURE);
        }
    }

    if (psoftlist->sl_return_value != CRYPTO_SUCCESS) {
        cryptodebug("CRYPTO_GET_SOFT_LIST ioctl failed, "
            "return_value = %d", psoftlist->sl_return_value);
        free(psoftlist);
        (void) close(fd);
        return (FAILURE);
    }

    *ppsoftlist = psoftlist;
    (void) close(fd);
    return (SUCCESS);
}