1 | // |
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2 | // MD5Engine.h |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/include/Poco/MD5Engine.h#2 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Crypt |
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8 | // Module: MD5Engine |
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9 | // |
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10 | // Definition of class MD5Engine. |
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11 | // |
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12 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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13 | // and Contributors. |
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14 | // |
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15 | // Permission is hereby granted, free of charge, to any person or organization |
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16 | // obtaining a copy of the software and accompanying documentation covered by |
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17 | // this license (the "Software") to use, reproduce, display, distribute, |
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18 | // execute, and transmit the Software, and to prepare derivative works of the |
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19 | // Software, and to permit third-parties to whom the Software is furnished to |
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20 | // do so, all subject to the following: |
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21 | // |
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22 | // The copyright notices in the Software and this entire statement, including |
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23 | // the above license grant, this restriction and the following disclaimer, |
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24 | // must be included in all copies of the Software, in whole or in part, and |
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25 | // all derivative works of the Software, unless such copies or derivative |
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26 | // works are solely in the form of machine-executable object code generated by |
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27 | // a source language processor. |
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28 | // |
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29 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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30 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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31 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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32 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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33 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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34 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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35 | // DEALINGS IN THE SOFTWARE. |
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36 | // |
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37 | // |
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38 | // MD5 (RFC 1321) algorithm: |
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39 | // Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All |
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40 | // rights reserved. |
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41 | // |
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42 | // License to copy and use this software is granted provided that it |
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43 | // is identified as the "RSA Data Security, Inc. MD5 Message-Digest |
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44 | // Algorithm" in all material mentioning or referencing this software |
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45 | // or this function. |
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46 | // |
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47 | // License is also granted to make and use derivative works provided |
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48 | // that such works are identified as "derived from the RSA Data |
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49 | // Security, Inc. MD5 Message-Digest Algorithm" in all material |
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50 | // mentioning or referencing the derived work. |
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51 | // |
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52 | // RSA Data Security, Inc. makes no representations concerning either |
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53 | // the merchantability of this software or the suitability of this |
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54 | // software for any particular purpose. It is provided "as is" |
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55 | // without express or implied warranty of any kind. |
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56 | // |
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57 | // These notices must be retained in any copies of any part of this |
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58 | // documentation and/or software. |
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59 | // |
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60 | |
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61 | |
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62 | #ifndef Foundation_MD5Engine_INCLUDED |
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63 | #define Foundation_MD5Engine_INCLUDED |
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64 | |
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65 | |
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66 | #include "Poco/Foundation.h" |
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67 | #include "Poco/DigestEngine.h" |
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68 | |
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69 | |
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70 | namespace Poco { |
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71 | |
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72 | |
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73 | class Foundation_API MD5Engine: public DigestEngine |
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74 | /// This class implementes the MD5 message digest algorithm, |
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75 | /// described in RFC 1321. |
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76 | { |
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77 | public: |
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78 | enum |
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79 | { |
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80 | BLOCK_SIZE = 64, |
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81 | DIGEST_SIZE = 16 |
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82 | }; |
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83 | |
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84 | MD5Engine(); |
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85 | ~MD5Engine(); |
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86 | |
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87 | unsigned digestLength() const; |
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88 | void reset(); |
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89 | const DigestEngine::Digest& digest(); |
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90 | |
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91 | protected: |
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92 | void updateImpl(const void* data, unsigned length); |
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93 | |
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94 | private: |
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95 | static void transform(UInt32 state[4], const unsigned char block[64]); |
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96 | static void encode(unsigned char* output, const UInt32* input, unsigned int len); |
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97 | static void decode(UInt32* output, const unsigned char* input, unsigned int len); |
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98 | |
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99 | struct Context |
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100 | { |
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101 | UInt32 state[4]; // state (ABCD) |
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102 | UInt32 count[2]; // number of bits, modulo 2^64 (lsb first) |
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103 | unsigned char buffer[64]; // input buffer |
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104 | }; |
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105 | |
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106 | Context _context; |
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107 | DigestEngine::Digest _digest; |
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108 | |
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109 | MD5Engine(const MD5Engine&); |
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110 | MD5Engine& operator = (const MD5Engine&); |
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111 | }; |
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112 | |
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113 | |
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114 | } // namespace Poco |
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115 | |
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116 | |
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117 | #endif // Foundation_MD5Engine_INCLUDED |
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