| 1 | /* |
| 2 | * QEMU Crypto block IV generator |
| 3 | * |
| 4 | * Copyright (c) 2015-2016 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 "qapi/error.h" |
| 23 | |
| 24 | #include "ivgenpriv.h" |
| 25 | #include "ivgen-plain.h" |
| 26 | #include "ivgen-plain64.h" |
| 27 | #include "ivgen-essiv.h" |
| 28 | |
| 29 | |
| 30 | QCryptoIVGen *qcrypto_ivgen_new(QCryptoIVGenAlgo alg, |
| 31 | QCryptoCipherAlgo cipheralg, |
| 32 | QCryptoHashAlgo hash, |
| 33 | const uint8_t *key, size_t nkey, |
| 34 | Error **errp) |
| 35 | { |
| 36 | QCryptoIVGen *ivgen = g_new0(QCryptoIVGen, 1); |
| 37 | |
| 38 | ivgen->algorithm = alg; |
| 39 | ivgen->cipher = cipheralg; |
| 40 | ivgen->hash = hash; |
| 41 | |
| 42 | switch (alg) { |
| 43 | case QCRYPTO_IV_GEN_ALGO_PLAIN: |
| 44 | ivgen->driver = &qcrypto_ivgen_plain; |
| 45 | break; |
| 46 | case QCRYPTO_IV_GEN_ALGO_PLAIN64: |
| 47 | ivgen->driver = &qcrypto_ivgen_plain64; |
| 48 | break; |
| 49 | case QCRYPTO_IV_GEN_ALGO_ESSIV: |
| 50 | ivgen->driver = &qcrypto_ivgen_essiv; |
| 51 | break; |
| 52 | default: |
| 53 | error_setg(errp, "Unknown block IV generator algorithm %d", alg); |
| 54 | g_free(ivgen); |
| 55 | return NULL; |
| 56 | } |
| 57 | |
| 58 | if (ivgen->driver->init(ivgen, key, nkey, errp) < 0) { |
| 59 | g_free(ivgen); |
| 60 | return NULL; |
| 61 | } |
| 62 | |
| 63 | return ivgen; |
| 64 | } |
| 65 | |
| 66 | |
| 67 | int qcrypto_ivgen_calculate(QCryptoIVGen *ivgen, |
| 68 | uint64_t sector, |
| 69 | uint8_t *iv, size_t niv, |
| 70 | Error **errp) |
| 71 | { |
| 72 | return ivgen->driver->calculate(ivgen, sector, iv, niv, errp); |
| 73 | } |
| 74 | |
| 75 | |
| 76 | QCryptoIVGenAlgo qcrypto_ivgen_get_algorithm(QCryptoIVGen *ivgen) |
| 77 | { |
| 78 | return ivgen->algorithm; |
| 79 | } |
| 80 | |
| 81 | |
| 82 | QCryptoCipherAlgo qcrypto_ivgen_get_cipher(QCryptoIVGen *ivgen) |
| 83 | { |
| 84 | return ivgen->cipher; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | QCryptoHashAlgo qcrypto_ivgen_get_hash(QCryptoIVGen *ivgen) |
| 89 | { |
| 90 | return ivgen->hash; |
| 91 | } |
| 92 | |
| 93 | |
| 94 | void qcrypto_ivgen_free(QCryptoIVGen *ivgen) |
| 95 | { |
| 96 | if (!ivgen) { |
| 97 | return; |
| 98 | } |
| 99 | ivgen->driver->cleanup(ivgen); |
| 100 | g_free(ivgen); |
| 101 | } |