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0a833519d1
2) add documentation git-svn-id: svn://kolibrios.org@3330 a494cfbc-eb01-0410-851d-a64ba20cac60
104 lines
2.8 KiB
HTML
104 lines
2.8 KiB
HTML
<html>
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<head>
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<title>áèáëèîòåêà äëÿ øèôðîâàíèÿ ôàéëîâ ïî àëãîðèòìó DES</title>
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<meta http-equiv="content-type" content="text/html; charset=WINDOWS-1251">
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<style>
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body
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font-size: 15px;
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font-family: "Bookman Old Style";
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color: black;
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h1 { color: green; font-size: 23px; }
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h2 { color: green; font-size: 21px; }
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h3 { color: green; font-size: 19px; }
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pre
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font-family: "Courier New";
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table { font-size: 15px; }
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</style>
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</head>
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<body>
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<h1>Îãëàâëåíèå</h1>
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<ul>
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<li>Âñòóïëåíèå</li>
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<li><a href="#fun">Ôóíêöèè</a><br>
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<ul>
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<li><a href="#f_en">des_encryption</a></li>
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<li><a href="#f_de">des_decryption</a></li>
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<li><a href="#tabl_e">Òàáëèöà ýêñïîðòà</a></li>
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</ul>
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<h1>Âñòóïëåíèå</h1>
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<p>Áèáëèîòåêà äëÿ øèôðîâàíèÿ ôàéëîâ ïî àëãîðèòìó DES (Data Encryption Standard) — ñèììåòðè÷íûé àëãîðèòì øèôðîâàíèÿ.</p>
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<p>Äîêóìåíòàöèÿ îáíîâëÿëàñü 05.03.13.</p>
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<h1><a name="fun">Ôóíêöèè</a></h1>
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<h4><a name="f_en">des_encryption</a></h4>
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<p>Ôóíêöèÿ øèôðîâàíèÿ ôàéëîâ. Ïðèìåð èñïîëüçîâàíèÿ:</p>
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<pre>txt_key db 'des_2013',0
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mem_key rb 120
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...
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mov eax,[open_file_size]
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shr eax,3
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stdcall [des_encryption], txt_key,mem_key,[open_file],eax</pre>
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<p>ãäå:</p>
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<p><b>txt_key</b> - âõîäíîé êëþ÷ 64 áèò</p>
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<p><b>mem_keys</b> - ïàìÿòü äëÿ ôîðìèðîâàíèÿ 16 ïîäêëþ÷åé (ðàçìåð 120 áàéò)</p>
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<p><b>[open_file]</b> - óêàçàòåëü íà ïåðâûé øèôðóåìûé 8 áàéòíûé áëîê</p>
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<p><b>eax</b> - ÷èñëî áëîêîâ äëÿ øèôðîâàíèÿ (<i>[open_file_size]</i> - ðàçìåð ôàéëà)</p>
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<h4><a name="f_de">des_decryption</a></h4>
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<p>Ôóíêöèÿ ðàñøèôðîâûâàíèÿ ôàéëîâ. Ïðèìåð èñïîëüçîâàíèÿ:</p>
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<pre>txt_key db 'des_2013',0
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mem_key rb 120
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...
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mov eax,[open_file_size]
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shr eax,3
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stdcall [des_decryption], txt_key,mem_key,[open_file],eax</pre>
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<p>ãäå:</p>
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<p><b>txt_key</b> - âõîäíîé êëþ÷ 64 áèò</p>
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<p><b>mem_keys</b> - ïàìÿòü äëÿ ôîðìèðîâàíèÿ 16 ïîäêëþ÷åé (ðàçìåð 120 áàéò)</p>
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<p><b>[open_file]</b> - óêàçàòåëü íà ïåðâûé ðàñøèôðîâûâàåìûé 8 áàéòíûé áëîê</p>
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<p><b>eax</b> - ÷èñëî áëîêîâ äëÿ ðàñøèôðîâàíèÿ (<i>[open_file_size]</i> - ðàçìåð ôàéëà)</p>
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<h1><a name="tabl_e">Òàáëèöà ýêñïîðòà</a></h1>
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<p>Ïðèìåð òàáëèöû ýêñïîðòà, ðàñ÷èòàííîé íà èñïîëüçîâàíèå ìàêðîñà <b>@use_library</b>:</p>
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<pre>align 4
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import_des:
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des_encryption dd sz_des_encryption
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des_decryption dd sz_des_decryption
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dd 0,0
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sz_des_encryption db 'des_encryption',0
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sz_des_decryption db 'des_decryption',0</pre>
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</body>
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</html> |