LXR qemu/crypto/pbkdf-nettle.c

   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 "qapi/error.h"
  23#include "crypto/pbkdf.h"
  24#include "nettle/pbkdf2.h"
  25
  26
  27bool qcrypto_pbkdf2_supports(QCryptoHashAlgorithm hash)
  28{
  29    switch (hash) {
  30    case QCRYPTO_HASH_ALG_SHA1:
  31    case QCRYPTO_HASH_ALG_SHA256:
  32        return true;
  33    default:
  34        return false;
  35    }
  36}
  37
  38int qcrypto_pbkdf2(QCryptoHashAlgorithm hash,
  39                   const uint8_t *key, size_t nkey,
  40                   const uint8_t *salt, size_t nsalt,
  41                   unsigned int iterations,
  42                   uint8_t *out, size_t nout,
  43                   Error **errp)
  44{
  45    switch (hash) {
  46    case QCRYPTO_HASH_ALG_SHA1:
  47        pbkdf2_hmac_sha1(nkey, key,
  48                         iterations,
  49                         nsalt, salt,
  50                         nout, out);
  51        break;
  52
  53    case QCRYPTO_HASH_ALG_SHA256:
  54        pbkdf2_hmac_sha256(nkey, key,
  55                           iterations,
  56                           nsalt, salt,
  57                           nout, out);
  58        break;
  59
  60    default:
  61        error_setg_errno(errp, ENOSYS,
  62                         "PBKDF does not support hash algorithm %d", hash);
  63        return -1;
  64    }
  65    return 0;
  66}
  67