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(QCryptoIVGenAlgorithm alg, |
31 | QCryptoCipherAlgorithm cipheralg, |
32 | QCryptoHashAlgorithm 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_IVGEN_ALG_PLAIN: |
44 | ivgen->driver = &qcrypto_ivgen_plain; |
45 | break; |
46 | case QCRYPTO_IVGEN_ALG_PLAIN64: |
47 | ivgen->driver = &qcrypto_ivgen_plain64; |
48 | break; |
49 | case QCRYPTO_IVGEN_ALG_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 | QCryptoIVGenAlgorithm qcrypto_ivgen_get_algorithm(QCryptoIVGen *ivgen) |
77 | { |
78 | return ivgen->algorithm; |
79 | } |
80 | |
81 | |
82 | QCryptoCipherAlgorithm qcrypto_ivgen_get_cipher(QCryptoIVGen *ivgen) |
83 | { |
84 | return ivgen->cipher; |
85 | } |
86 | |
87 | |
88 | QCryptoHashAlgorithm 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 | } |
102 | |