include/crypto/random.h

   1 /*
   2  * QEMU Crypto random number provider
   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 #ifndef QCRYPTO_RANDOM_H
  22 #define QCRYPTO_RANDOM_H
  23
  24 #include "qemu-common.h"
  25
  26 /**
  27  * qcrypto_random_bytes:
  28  * @buf: the buffer to fill
  29  * @buflen: length of @buf in bytes
  30  * @errp: pointer to a NULL-initialized error object
  31  *
  32  * Fill @buf with @buflen bytes of cryptographically strong
  33  * random data
  34  *
  35  * Returns 0 on success, -1 on error
  36  */
  37 int qcrypto_random_bytes(uint8_t *buf,
  38                          size_t buflen,
  39                          Error **errp);
  40
  41 /**
  42  * qcrypto_random_init:
  43  * @errp: pointer to a NULL-initialized error object
  44  *
  45  * Initializes the handles used by qcrypto_random_bytes
  46  *
  47  * Returns 0 on success, -1 on error
  48  */
  49 int qcrypto_random_init(Error **errp);
  50
  51 #endif /* QCRYPTO_RANDOM_H */