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 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