1 /* 2 * QEMU Crypto PBKDF support (Password-Based Key Derivation Function) 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/pbkdf.h" 23 #include "nettle/pbkdf2.h" 24 25 26 bool qcrypto_pbkdf2_supports(QCryptoHashAlgorithm hash) 27 { 28 switch (hash) { 29 case QCRYPTO_HASH_ALG_SHA1: 30 case QCRYPTO_HASH_ALG_SHA256: 31 return true; 32 default: 33 return false; 34 } 35 } 36 37 int qcrypto_pbkdf2(QCryptoHashAlgorithm hash, 38 const uint8_t *key, size_t nkey, 39 const uint8_t *salt, size_t nsalt, 40 unsigned int iterations, 41 uint8_t *out, size_t nout, 42 Error **errp) 43 { 44 switch (hash) { 45 case QCRYPTO_HASH_ALG_SHA1: 46 pbkdf2_hmac_sha1(nkey, key, 47 iterations, 48 nsalt, salt, 49 nout, out); 50 break; 51 52 case QCRYPTO_HASH_ALG_SHA256: 53 pbkdf2_hmac_sha256(nkey, key, 54 iterations, 55 nsalt, salt, 56 nout, out); 57 break; 58 59 default: 60 error_setg_errno(errp, ENOSYS, 61 "PBKDF does not support hash algorithm %d", hash); 62 return -1; 63 } 64 return 0; 65 } 66