md5stream.h
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1 /*
2  * Copyright (C) 2003 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef CXXTOOLS_MD5STREAM_H
30 #define CXXTOOLS_MD5STREAM_H
31 
32 #include <iostream>
33 
34 struct cxxtools_MD5_CTX;
35 
36 namespace cxxtools
37 {
38 
39 class Md5streambuf : public std::streambuf
40 {
41  public:
42  Md5streambuf();
43  ~Md5streambuf();
44 
45  void getDigest(unsigned char digest[16]);
46 
47  private:
48  static const unsigned int bufsize = 64;
49  char buffer[bufsize];
50  cxxtools_MD5_CTX* context;
51  unsigned char digest[16];
52 
53  std::streambuf::int_type overflow(std::streambuf::int_type ch);
54  std::streambuf::int_type underflow();
55  int sync();
56 };
57 
85 class Md5stream : public std::ostream
86 {
87  public:
88  typedef std::ostreambuf_iterator<char> iterator;
89 
90  private:
91  Md5streambuf streambuf;
92  char hexdigest[33];
93 
94  public:
97  : std::ostream(0)
98  {
99  init(&streambuf);
100  }
101 
103  void getDigest(unsigned char digest[16])
104  { streambuf.getDigest(digest); }
106  const char* getHexDigest();
107 
110  { return iterator(&streambuf); }
111 };
112 
113 }
114 
115 #endif // CXXTOOLS_MD5STREAM_H