| 1 | /* |
| 2 | * QEMU Crypto initialization |
| 3 | * |
| 4 | * Copyright (c) 2015 Red Hat, Inc. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "crypto/init.h" |
| 23 | #include "qapi/error.h" |
| 24 | #include "qemu/thread.h" |
| 25 | |
| 26 | #ifdef CONFIG_GNUTLS |
| 27 | #include <gnutls/gnutls.h> |
| 28 | #include <gnutls/crypto.h> |
| 29 | #endif |
| 30 | |
| 31 | #ifdef CONFIG_GCRYPT |
| 32 | #include <gcrypt.h> |
| 33 | #endif |
| 34 | |
| 35 | #include "crypto/random.h" |
| 36 | |
| 37 | |
| 38 | /* |
| 39 | * To debug GNUTLS see env vars listed in |
| 40 | * https://gnutls.org/manual/html_node/Debugging-and-auditing.html |
| 41 | */ |
| 42 | int qcrypto_init(Error **errp) |
| 43 | { |
| 44 | #ifdef CONFIG_GNUTLS |
| 45 | int ret; |
| 46 | ret = gnutls_global_init(); |
| 47 | if (ret < 0) { |
| 48 | error_setg(errp, |
| 49 | "Unable to initialize GNUTLS library: %s", |
| 50 | gnutls_strerror(ret)); |
| 51 | return -1; |
| 52 | } |
| 53 | #endif |
| 54 | |
| 55 | #ifdef CONFIG_GCRYPT |
| 56 | if (!gcry_check_version(NULL)) { |
| 57 | error_setg(errp, "Unable to initialize gcrypt"); |
| 58 | return -1; |
| 59 | } |
| 60 | gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0); |
| 61 | #endif |
| 62 | |
| 63 | if (qcrypto_random_init(errp) < 0) { |
| 64 | return -1; |
| 65 | } |
| 66 | |
| 67 | return 0; |
| 68 | } |