GNU CommonC++
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00001 // Copyright (C) 1999-2005 Open Source Telecom Corporation. 00002 // 00003 // This program is free software; you can redistribute it and/or modify 00004 // it under the terms of the GNU General Public License as published by 00005 // the Free Software Foundation; either version 2 of the License, or 00006 // (at your option) any later version. 00007 // 00008 // This program is distributed in the hope that it will be useful, 00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00011 // GNU General Public License for more details. 00012 // 00013 // You should have received a copy of the GNU General Public License 00014 // along with this program; if not, write to the Free Software 00015 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00016 // 00017 // As a special exception, you may use this file as part of a free software 00018 // library without restriction. Specifically, if other files instantiate 00019 // templates or use macros or inline functions from this file, or you compile 00020 // this file and link it with other files to produce an executable, this 00021 // file does not by itself cause the resulting executable to be covered by 00022 // the GNU General Public License. This exception does not however 00023 // invalidate any other reasons why the executable file might be covered by 00024 // the GNU General Public License. 00025 // 00026 // This exception applies only to the code released under the name GNU 00027 // Common C++. If you copy code from other releases into a copy of GNU 00028 // Common C++, as the General Public License permits, the exception does 00029 // not apply to the code that you add in this way. To avoid misleading 00030 // anyone as to the status of such modified files, you must delete 00031 // this exception notice from them. 00032 // 00033 // If you write modifications of your own for GNU Common C++, it is your choice 00034 // whether to permit this exception to apply to your modifications. 00035 // If you do not wish that, delete this exception notice. 00036 // 00037 00043 #ifndef CCXX_DIGEST_H_ 00044 #define CCXX_DIGEST_H_ 00045 00046 #ifndef CCXX_MISSING_H_ 00047 #include <cc++/missing.h> 00048 #endif 00049 00050 #ifndef CCXX_THREAD_H_ 00051 #include <cc++/thread.h> 00052 #endif 00053 00054 #ifndef CCXX_EXCEPTION_H_ 00055 #include <cc++/exception.h> 00056 #endif 00057 00058 #ifdef CCXX_NAMESPACES 00059 namespace ost { 00060 #endif 00061 00069 class __EXPORT Digest : protected std::streambuf, public std::ostream 00070 { 00071 protected: 00072 Digest(); 00073 00079 virtual unsigned getSize(void) = 0; 00080 00087 virtual unsigned getDigest(unsigned char *buffer) = 0; 00088 00095 virtual void putDigest(const unsigned char *buffer, unsigned length) = 0; 00096 00102 virtual std::ostream &strDigest(std::ostream &os) = 0; 00103 00104 friend std::ostream &operator<<(std::ostream &os, Digest &ia) 00105 {return ia.strDigest(os);}; 00106 00107 public: 00111 virtual void initDigest(void) = 0; 00112 00113 virtual ~Digest(); 00114 }; 00115 00122 class __EXPORT ChecksumDigest : public Digest 00123 { 00124 private: 00125 unsigned char csum; 00126 00127 protected: 00128 int overflow(int c); 00129 std::ostream &strDigest(std::ostream &os); 00130 00131 public: 00132 ChecksumDigest(); 00133 00134 void initDigest(void) 00135 {csum = 0;}; 00136 00137 unsigned getSize(void) 00138 {return 1;}; 00139 00140 unsigned getDigest(unsigned char *buffer); 00141 00142 void putDigest(const unsigned char *buffer, unsigned length); 00143 }; 00144 00151 class __EXPORT CRC16Digest : public Digest 00152 { 00153 private: 00154 unsigned short crc16; 00155 00156 protected: 00157 int overflow(int c); 00158 00159 std::ostream &strDigest(std::ostream &os); 00160 00161 public: 00162 CRC16Digest(); 00163 00164 inline void initDigest(void) 00165 {crc16 = 0;}; 00166 00167 inline unsigned getSize(void) 00168 {return 2;}; 00169 00170 unsigned getDigest(unsigned char *buffer); 00171 00172 void putDigest(const unsigned char *buffer, unsigned length); 00173 }; 00174 00182 class __EXPORT CRC32Digest : public Digest 00183 { 00184 private: 00185 unsigned long crc_table[256]; 00186 unsigned long crc_reg; 00187 unsigned long crc32; 00188 00189 protected: 00190 unsigned char overflow(unsigned char octet); 00191 00192 std::ostream &strDigest(std::ostream &os); 00193 00194 public: 00195 CRC32Digest(); 00196 00197 void initDigest(void); 00198 00199 inline unsigned getSize(void) {return 4;} 00200 00201 unsigned getDigest(unsigned char *buffer); 00202 00203 void putDigest(const unsigned char *buffer, unsigned length); 00204 }; 00205 00212 class __EXPORT MD5Digest : public Digest 00213 { 00214 private: 00215 unsigned long state[4]; 00216 unsigned long count[2]; 00217 unsigned char buf[64]; 00218 unsigned bpos; 00219 unsigned char md5[16]; 00220 bool updated; 00221 00222 protected: 00223 int overflow(int c); 00224 00225 void update(void); 00226 00227 void commit(void); 00228 00229 std::ostream &strDigest(std::ostream &os); 00230 00231 public: 00232 MD5Digest(); 00233 00234 void initDigest(void); 00235 00236 inline unsigned getSize(void) 00237 {return 16;}; 00238 00239 unsigned getDigest(unsigned char *buffer); 00240 00241 void putDigest(const unsigned char *buffer, unsigned len); 00242 }; 00243 00244 #ifdef COMMON_STD_EXCEPTION 00245 00254 class __EXPORT DigestException : public Exception { 00255 public: 00256 DigestException(const String &str) : Exception(str) {}; 00257 }; 00258 #endif 00259 00260 #ifdef CCXX_NAMESPACES 00261 } 00262 #endif 00263 00264 #endif 00265