cjdns/crypto/random/seed/SystemRandomSeed.c

/* vim: set expandtab ts=4 sw=4: */
/*
 * You may redistribute this program and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "crypto/random/seed/RandomSeed.h"
#include "util/log/Log.h"

#include "crypto/random/seed/RandomSeedProvider.h"
#include "crypto/random/seed/RtlGenRandomSeed.h"
#include "crypto/random/seed/BsdKernArndSysctlRandomSeed.h"
#include "crypto/random/seed/DevUrandomRandomSeed.h"
#include "crypto/random/seed/LinuxRandomUuidSysctlRandomSeed.h"
#include "crypto/random/seed/ProcSysKernelRandomUuidRandomSeed.h"

static RandomSeed_Provider PROVIDERS[] = { RandomSeedProvider_list() };
#define PROVIDERS_COUNT ((int)(sizeof(PROVIDERS) / sizeof(RandomSeed_Provider)))

struct RandomSeed* SystemRandomSeed_new(RandomSeed_Provider* additionalProviders,
                                        int additionalProviderCount,
                                        struct Log* logger,
                                        struct Allocator* alloc)
{
    int providerCount = PROVIDERS_COUNT + additionalProviderCount;

    RandomSeed_Provider* allProviders =
        Allocator_calloc(alloc, sizeof(RandomSeed_Provider), providerCount+1);
    int i = 0;
    for (int j = 0; j < additionalProviderCount; j++) {
        allProviders[i++] = additionalProviders[j];
    }
    for (int j = 0; j < PROVIDERS_COUNT; j++) {
        allProviders[i++] = PROVIDERS[j];
    }
    return RandomSeed_new(allProviders, providerCount, logger, alloc);
}