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 "crypto/ivgenpriv.h" 23 #include "crypto/ivgen-plain.h" 24 #include "crypto/ivgen-plain64.h" 25 #include "crypto/ivgen-essiv.h" 26 27 28 QCryptoIVGen *qcrypto_ivgen_new(QCryptoIVGenAlgorithm alg, 29 QCryptoCipherAlgorithm cipheralg, 30 QCryptoHashAlgorithm hash, 31 const uint8_t *key, size_t nkey, 32 Error **errp) 33 { 34 QCryptoIVGen *ivgen = g_new0(QCryptoIVGen, 1); 35 36 ivgen->algorithm = alg; 37 ivgen->cipher = cipheralg; 38 ivgen->hash = hash; 39 40 switch (alg) { 41 case QCRYPTO_IVGEN_ALG_PLAIN: 42 ivgen->driver = &qcrypto_ivgen_plain; 43 break; 44 case QCRYPTO_IVGEN_ALG_PLAIN64: 45 ivgen->driver = &qcrypto_ivgen_plain64; 46 break; 47 case QCRYPTO_IVGEN_ALG_ESSIV: 48 ivgen->driver = &qcrypto_ivgen_essiv; 49 break; 50 default: 51 error_setg(errp, "Unknown block IV generator algorithm %d", alg); 52 g_free(ivgen); 53 return NULL; 54 } 55 56 if (ivgen->driver->init(ivgen, key, nkey, errp) < 0) { 57 g_free(ivgen); 58 return NULL; 59 } 60 61 return ivgen; 62 } 63 64 65 int qcrypto_ivgen_calculate(QCryptoIVGen *ivgen, 66 uint64_t sector, 67 uint8_t *iv, size_t niv, 68 Error **errp) 69 { 70 return ivgen->driver->calculate(ivgen, sector, iv, niv, errp); 71 } 72 73 74 QCryptoIVGenAlgorithm qcrypto_ivgen_get_algorithm(QCryptoIVGen *ivgen) 75 { 76 return ivgen->algorithm; 77 } 78 79 80 QCryptoCipherAlgorithm qcrypto_ivgen_get_cipher(QCryptoIVGen *ivgen) 81 { 82 return ivgen->cipher; 83 } 84 85 86 QCryptoHashAlgorithm qcrypto_ivgen_get_hash(QCryptoIVGen *ivgen) 87 { 88 return ivgen->hash; 89 } 90 91 92 void qcrypto_ivgen_free(QCryptoIVGen *ivgen) 93 { 94 if (!ivgen) { 95 return; 96 } 97 ivgen->driver->cleanup(ivgen); 98 g_free(ivgen); 99 } 100