4
// $Id: //poco/1.2/Foundation/src/RandomStream.cpp#1 $
8
// Module: RandomStream
10
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
13
// Permission is hereby granted, free of charge, to any person or organization
14
// obtaining a copy of the software and accompanying documentation covered by
15
// this license (the "Software") to use, reproduce, display, distribute,
16
// execute, and transmit the Software, and to prepare derivative works of the
17
// Software, and to permit third-parties to whom the Software is furnished to
18
// do so, all subject to the following:
20
// The copyright notices in the Software and this entire statement, including
21
// the above license grant, this restriction and the following disclaimer,
22
// must be included in all copies of the Software, in whole or in part, and
23
// all derivative works of the Software, unless such copies or derivative
24
// works are solely in the form of machine-executable object code generated by
25
// a source language processor.
27
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
30
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
31
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
32
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
33
// DEALINGS IN THE SOFTWARE.
37
#include "Poco/RandomStream.h"
38
#include "Poco/Random.h"
39
#include "Poco/SHA1Engine.h"
40
#if defined(POCO_OS_FAMILY_WINDOWS)
43
#elif defined(POCO_OS_FAMILY_UNIX)
53
RandomBuf::RandomBuf(): BufferedStreamBuf(256, std::ios::in)
58
RandomBuf::~RandomBuf()
63
int RandomBuf::readFromDevice(char* buffer, std::streamsize length)
67
#if defined(POCO_OS_FAMILY_WINDOWS)
68
HCRYPTPROV hProvider = 0;
69
CryptAcquireContext(&hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
70
CryptGenRandom(hProvider, length, (BYTE*) buffer);
71
CryptReleaseContext(hProvider, 0);
74
#if defined(POCO_OS_FAMILY_UNIX)
75
int fd = open("/dev/urandom", O_RDONLY, 0);
78
n = read(fd, buffer, length);
84
// x is here as a source of randomness, so it does not make
85
// much sense to protect it with a Mutex.
93
UInt32 t = (UInt32) time(NULL);
94
engine.update(&t, sizeof(t));
96
engine.update(&p, sizeof(p));
97
engine.update(buffer, length);
99
engine.update(junk, sizeof(junk));
102
for (int i = 0; i < 100; ++i)
104
UInt32 r = rnd2.next();
105
engine.update(&r, sizeof(r));
106
engine.update(&x, sizeof(x));
109
DigestEngine::Digest d = engine.digest();
110
for (DigestEngine::Digest::const_iterator it = d.begin(); it != d.end() && n < length; ++it, ++n)
122
RandomIOS::RandomIOS()
124
poco_ios_init(&_buf);
128
RandomIOS::~RandomIOS()
133
RandomBuf* RandomIOS::rdbuf()
139
RandomInputStream::RandomInputStream(): std::istream(&_buf)
144
RandomInputStream::~RandomInputStream()