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199</div>
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205
206<div class="main">
207
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]208<h1>Module cipher Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]209<p class="navigation-index">[<a href="#AcquireAESInfo">AcquireAESInfo</a> &bull; <a href="#DestroyAESInfo">DestroyAESInfo</a> &bull; <a href="#EncipherAESBlock">EncipherAESBlock</a> &bull; <a href="#PasskeyDecipherImage">PasskeyDecipherImage</a> &bull; <a href="#PasskeyEncipherImage">PasskeyEncipherImage</a> &bull; <a href="#SetAESKey">SetAESKey</a> &bull; <a href="#PasskeyDecipherImage">PasskeyDecipherImage</a> &bull; <a href="#PasskeyEncipherImage">PasskeyEncipherImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]210
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]211<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="AcquireAESInfo">AcquireAESInfo</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]212<div class="doc-section">
213
214<p>AcquireAESInfo() allocate the AESInfo structure.</p>
215
216<p>The format of the AcquireAESInfo method is:</p>
217
218<pre class="code">
219 AESInfo *AcquireAESInfo(void)
220</pre>
221
222 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]223<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="DestroyAESInfo">DestroyAESInfo</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]224<div class="doc-section">
225
226<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p>
227
228<p>The format of the DestroyAESInfo method is:</p>
229
230<pre class="code">
231 AESInfo *DestroyAESInfo(AESInfo *aes_info)
232</pre>
233
234<p>A description of each parameter follows:</p>
235
236<h5>aes_info</h5>
237<p>the cipher context.</p>
238
239 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]240<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="EncipherAESBlock">EncipherAESBlock</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]241<div class="doc-section">
242
243<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p>
244
245<p>The format of the EncipherAESBlock method is:</p>
246
247<pre class="code">
248 void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
249 unsigned char *ciphertext)
250</pre>
251
252<p>A description of each parameter follows:</p>
253
254<h5>aes_info</h5>
255<p>the cipher context.</p>
256
257<h5>plaintext</h5>
258<p>the plain text.</p>
259
260<h5>ciphertext</h5>
261<p>the cipher text.</p>
262
263 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]264<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]265<div class="doc-section">
266
267<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
268
269<p>The format of the PasskeyDecipherImage method is:</p>
270
271<pre class="code">
272 MagickBooleanType PasskeyDecipherImage(Image *image,
273 const StringInfo *passkey,ExceptionInfo *exception)
274 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
275 ExceptionInfo *exception)
276</pre>
277
278<p>A description of each parameter follows:</p>
279
280<h5>image</h5>
281<p>the image.</p>
282
283<h5>passphrase</h5>
284<p>decipher cipher pixels with this passphrase.</p>
285
286<h5>passkey</h5>
287<p>decrypt cipher pixels with this passkey.</p>
288
289<h5>exception</h5>
290<p>return any errors or warnings in this structure.</p>
291
292 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]293<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]294<div class="doc-section">
295
296<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
297
298<p>The format of the PasskeyEncipherImage method is:</p>
299
300<pre class="code">
301 MagickBooleanType PasskeyEncipherImage(Image *image,
302 const StringInfo *passkey,ExceptionInfo *exception)
303 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
304 ExceptionInfo *exception)
305</pre>
306
307<p>A description of each parameter follows:</p>
308
309<h5>image</h5>
310<p>the image.</p>
311
312<h5>passphrase</h5>
313<p>encipher pixels with this passphrase.</p>
314
315<h5>passkey</h5>
316<p>decrypt cipher pixels with this passkey.</p>
317
318<h5>exception</h5>
319<p>return any errors or warnings in this structure.</p>
320
321 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]322<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="SetAESKey">SetAESKey</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]323<div class="doc-section">
324
325<p>SetAESKey() sets the key for the AES cipher. The key length is specified in bits. Valid values are 128, 192, or 256 requiring a key buffer length in bytes of 16, 24, and 32 respectively.</p>
326
327<p>The format of the SetAESKey method is:</p>
328
329<pre class="code">
330 SetAESKey(AESInfo *aes_info,const StringInfo *key)
331</pre>
332
333<p>A description of each parameter follows:</p>
334
335<h5>aes_info</h5>
336<p>the cipher context.</p>
337
338<h5>key</h5>
339<p>the key.</p>
340
341 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]342<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]343<div class="doc-section">
344
345<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
346
347<p>The format of the PasskeyDecipherImage method is:</p>
348
349<pre class="code">
350 MagickBooleanType PasskeyDecipherImage(Image *image,
351 const StringInfo *passkey,ExceptionInfo *exception)
352 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
353 ExceptionInfo *exception)
354</pre>
355
356<p>A description of each parameter follows:</p>
357
358<h5>image</h5>
359<p>the image.</p>
360
361<h5>passphrase</h5>
362<p>decipher cipher pixels with this passphrase.</p>
363
364<h5>passkey</h5>
365<p>decrypt cipher pixels with this passkey.</p>
366
367<h5>exception</h5>
368<p>return any errors or warnings in this structure.</p>
369
370 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]371<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]372<div class="doc-section">
373
374<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
375
376<p>The format of the PasskeyEncipherImage method is:</p>
377
378<pre class="code">
379 MagickBooleanType PasskeyEncipherImage(Image *image,
380 const StringInfo *passkey,ExceptionInfo *exception)
381 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
382 ExceptionInfo *exception)
383</pre>
384
385<p>A description of each parameter follows:</p>
386
387<h5>passphrase</h5>
388<p>decipher cipher pixels with this passphrase.</p>
389
390<h5>passkey</h5>
391<p>decrypt cipher pixels with this passkey.</p>
392
393<h5>exception</h5>
394<p>return any errors or warnings in this structure.</p>
395
396 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]397
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