service_runtime/nacl_secure_random.h

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime.  Secure RNG abstraction.
  34  */
  35
  36 #ifndef NATIVE_CLIENT_SERVICE_RUNTIME_NACL_SECURE_RANDOM_H_
  37 #define NATIVE_CLIENT_SERVICE_RUNTIME_NACL_SECURE_RANDOM_H_
  38
  39 #include "native_client/include/portability.h"
  40
  41 #include "native_client/include/nacl_base.h"
  42
  43 /*
  44  * Get struct NaClSecureRng, since users will need its size for
  45  * placement-new style initialization.
  46  */
  47 #if NACL_LINUX || NACL_OSX
  48 # include "native_client/service_runtime/linux/nacl_secure_random_types.h"
  49 #elif NACL_WINDOWS
  50 # include "native_client/service_runtime/win/nacl_secure_random_types.h"
  51 #endif
  52
  53 EXTERN_C_BEGIN
  54
  55 void NaClSecureRngModuleInit(void);
  56
  57 void NaClSecureRngModuleFini(void);
  58
  59 int NaClSecureRngCtor(struct NaClSecureRng *self);
  60
  61 void NaClSecureRngDtor(struct NaClSecureRng *self);
  62
  63 char NaClSecureRngGenByte(struct NaClSecureRng *self);
  64
  65 uint32_t NaClSecureRngGenUint32(struct NaClSecureRng *self);
  66
  67 void NaClSecureRngGenBytes(struct NaClSecureRng *self,
  68                            char                 *buf,
  69                            size_t               nbytes);
  70
  71 /*
  72  * Generate an uniformly random number in [0, range_max).  May invoke
  73  * the provided generator multiple times.
  74  */
  75 uint32_t NaClSecureRngUniform(struct NaClSecureRng  *self,
  76                               uint32_t              range_max);
  77
  78 EXTERN_C_END
  79
  80 #endif