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 #include "qapi/error.h"
  26
  27
  28 /**
  29  * qcrypto_random_bytes:
  30  * @buf: the buffer to fill
  31  * @buflen: length of @buf in bytes
  32  * @errp: pointer to a NULL-initialized error object
  33  *
  34  * Fill @buf with @buflen bytes of cryptographically strong
  35  * random data
  36  *
  37  * Returns 0 on success, -1 on error
  38  */
  39 int qcrypto_random_bytes(uint8_t *buf,
  40                          size_t buflen,
  41                          Error **errp);
  42
  43 /**
  44  * qcrypto_random_init:
  45  * @errp: pointer to a NULL-initialized error object
  46  *
  47  * Initializes the handles used by qcrypto_random_bytes
  48  *
  49  * Returns 0 on success, -1 on error
  50  */
  51 int qcrypto_random_init(Error **errp);
  52
  53 #endif /* QCRYPTO_RANDOM_H */