qemu

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/*
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 * QEMU Crypto initialization
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 *
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 * Copyright (c) 2015 Red Hat, Inc.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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 *
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 */
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#include "qemu/osdep.h"
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#include "crypto/init.h"
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#include "qapi/error.h"
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#include "qemu/thread.h"
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#ifdef CONFIG_GNUTLS
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#include <gnutls/gnutls.h>
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#include <gnutls/crypto.h>
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#endif
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#ifdef CONFIG_GCRYPT
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#include <gcrypt.h>
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#endif
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#include "crypto/random.h"
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/*
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 * To debug GNUTLS see env vars listed in
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 * https://gnutls.org/manual/html_node/Debugging-and-auditing.html
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 */
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int qcrypto_init(Error **errp)
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{
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#ifdef CONFIG_GNUTLS
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    int ret;
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    ret = gnutls_global_init();
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    if (ret < 0) {
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        error_setg(errp,
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                   "Unable to initialize GNUTLS library: %s",
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                   gnutls_strerror(ret));
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        return -1;
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    }
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#endif
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#ifdef CONFIG_GCRYPT
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    if (!gcry_check_version(NULL)) {
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        error_setg(errp, "Unable to initialize gcrypt");
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        return -1;
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    }
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    gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
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#endif
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    if (qcrypto_random_init(errp) < 0) {
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        return -1;
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    }
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    return 0;
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}
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