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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: osrng.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>osrng.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// osrng.cpp - written and placed in the public domain by Wei Dai</span><a name="l00002"></a>00002 <a name="l00003"></a>00003 <span class="comment">// Thanks to Leonard Janke for the suggestion for AutoSeededRandomPool.</span><a name="l00004"></a>00004 <a name="l00005"></a>00005 <span class="preprocessor">#include "pch.h"</span><a name="l00006"></a>00006 <a name="l00007"></a>00007 <span class="preprocessor">#ifndef CRYPTOPP_IMPORTS</span><a name="l00008"></a>00008 <span class="preprocessor"></span><a name="l00009"></a>00009 <span class="preprocessor">#include "osrng.h"</span><a name="l00010"></a>00010 <a name="l00011"></a>00011 <span class="preprocessor">#ifdef OS_RNG_AVAILABLE</span><a name="l00012"></a>00012 <span class="preprocessor"></span><a name="l00013"></a>00013 <span class="preprocessor">#include "rng.h"</span><a name="l00014"></a>00014 <a name="l00015"></a>00015 <span class="preprocessor">#ifdef CRYPTOPP_WIN32_AVAILABLE</span><a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#ifndef _WIN32_WINNT</span><a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#define _WIN32_WINNT 0x0400</span><a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#endif</span><a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span><a name="l00020"></a>00020 <span class="preprocessor">#include <wincrypt.h></span><a name="l00021"></a>00021 <span class="preprocessor">#endif</span><a name="l00022"></a>00022 <span class="preprocessor"></span><a name="l00023"></a>00023 <span class="preprocessor">#ifdef CRYPTOPP_UNIX_AVAILABLE</span><a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#include <errno.h></span><a name="l00025"></a>00025 <span class="preprocessor">#include <fcntl.h></span><a name="l00026"></a>00026 <span class="preprocessor">#include <unistd.h></span><a name="l00027"></a>00027 <span class="preprocessor">#endif</span><a name="l00028"></a>00028 <span class="preprocessor"></span><a name="l00029"></a>00029 NAMESPACE_BEGIN(CryptoPP)<a name="l00030"></a>00030 <a name="l00031"></a>00031 <span class="preprocessor">#if defined(NONBLOCKING_RNG_AVAILABLE) || defined(BLOCKING_RNG_AVAILABLE)</span><a name="l00032"></a><a class="code" href="class_o_s___r_n_g___err.html#ac1ad9f91292d8ab1a3816f637941cc7">00032</a> <span class="preprocessor"></span><a class="code" href="class_o_s___r_n_g___err.html#ac1ad9f91292d8ab1a3816f637941cc7">OS_RNG_Err::OS_RNG_Err</a>(<span class="keyword">const</span> std::string &operation)<a name="l00033"></a>00033 : <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(OTHER_ERROR, <span class="stringliteral">"OS_Rng: "</span> + operation + <span class="stringliteral">" operation failed with error "</span> + <a name="l00034"></a>00034 #ifdef CRYPTOPP_WIN32_AVAILABLE<a name="l00035"></a>00035 <span class="stringliteral">"0x"</span> + IntToString(GetLastError(), 16)<a name="l00036"></a>00036 #else<a name="l00037"></a>00037 IntToString(errno)<a name="l00038"></a>00038 #endif<a name="l00039"></a>00039 )<a name="l00040"></a>00040 {<a name="l00041"></a>00041 }<a name="l00042"></a>00042 <span class="preprocessor">#endif</span><a name="l00043"></a>00043 <span class="preprocessor"></span><a name="l00044"></a>00044 <span class="preprocessor">#ifdef NONBLOCKING_RNG_AVAILABLE</span><a name="l00045"></a>00045 <span class="preprocessor"></span><a name="l00046"></a>00046 <span class="preprocessor">#ifdef CRYPTOPP_WIN32_AVAILABLE</span><a name="l00047"></a>00047 <span class="preprocessor"></span><a name="l00048"></a><a class="code" href="class_microsoft_crypto_provider.html#7da7375ab68892b8237bd682e13c5ab4">00048</a> <a class="code" href="class_microsoft_crypto_provider.html#7da7375ab68892b8237bd682e13c5ab4">MicrosoftCryptoProvider::MicrosoftCryptoProvider</a>()<a name="l00049"></a>00049 {<a name="l00050"></a>00050 <span class="keywordflow">if</span>(!CryptAcquireContext(&m_hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))<a name="l00051"></a>00051 <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html" title="Exception class for Operating-System Random Number Generator.">OS_RNG_Err</a>(<span class="stringliteral">"CryptAcquireContext"</span>);<a name="l00052"></a>00052 }<a name="l00053"></a>00053 <a name="l00054"></a><a class="code" href="class_microsoft_crypto_provider.html#aa71d9e8717aab25022eecb03778208e">00054</a> <a class="code" href="class_microsoft_crypto_provider.html#aa71d9e8717aab25022eecb03778208e">MicrosoftCryptoProvider::~MicrosoftCryptoProvider</a>()<a name="l00055"></a>00055 {<a name="l00056"></a>00056 CryptReleaseContext(m_hProvider, 0);<a name="l00057"></a>00057 }<a name="l00058"></a>00058 <a name="l00059"></a>00059 <span class="preprocessor">#endif</span><a name="l00060"></a>00060 <span class="preprocessor"></span><a name="l00061"></a><a class="code" href="class_nonblocking_rng.html#09b27b1803636bdd60a64f7f587433ed">00061</a> <a class="code" href="class_nonblocking_rng.html#09b27b1803636bdd60a64f7f587433ed">NonblockingRng::NonblockingRng</a>()<a name="l00062"></a>00062 {<a name="l00063"></a>00063 <span class="preprocessor">#ifndef CRYPTOPP_WIN32_AVAILABLE</span><a name="l00064"></a>00064 <span class="preprocessor"></span> m_fd = open(<span class="stringliteral">"/dev/urandom"</span>,O_RDONLY);<a name="l00065"></a>00065 <span class="keywordflow">if</span> (m_fd == -1)<a name="l00066"></a>00066 <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html" title="Exception class for Operating-System Random Number Generator.">OS_RNG_Err</a>(<span class="stringliteral">"open /dev/urandom"</span>);<a name="l00067"></a>00067 <span class="preprocessor">#endif</span><a name="l00068"></a>00068 <span class="preprocessor"></span>}<a name="l00069"></a>00069 <a name="l00070"></a><a class="code" href="class_nonblocking_rng.html#225e49b6b8f56046da771d7e345af4dd">00070</a> <a class="code" href="class_nonblocking_rng.html#225e49b6b8f56046da771d7e345af4dd">NonblockingRng::~NonblockingRng</a>()<a name="l00071"></a>00071 {<a name="l00072"></a>00072 <span class="preprocessor">#ifndef CRYPTOPP_WIN32_AVAILABLE</span><a name="l00073"></a>00073 <span class="preprocessor"></span> close(m_fd);<a name="l00074"></a>00074 <span class="preprocessor">#endif</span><a name="l00075"></a>00075 <span class="preprocessor"></span>}<a name="l00076"></a>00076 <a name="l00077"></a><a class="code" href="class_nonblocking_rng.html#c74f9b2acf05938b98eedc806c4c29d3">00077</a> <span class="keywordtype">void</span> <a class="code" href="class_nonblocking_rng.html#c74f9b2acf05938b98eedc806c4c29d3" title="generate random array of bytes">NonblockingRng::GenerateBlock</a>(byte *output, <span class="keywordtype">size_t</span> size)<a name="l00078"></a>00078 {⌨️ 快捷键说明
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