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190
191<div class="main">
192
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame^]193<h1>Module cipher
194 Methods</h1>
195<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]196
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame^]197<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
198_8c.html" id="AcquireAESInfo">AcquireAESInfo</a></h2>
199<div class="doc-section">
200
201<p>AcquireAESInfo() allocate the AESInfo structure.</p>
202
203<p>The format of the AcquireAESInfo method is:</p>
204
205<pre class="code">
206 AESInfo *AcquireAESInfo(void)
207</pre>
208
209 </div>
210<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
211_8c.html" id="DestroyAESInfo">DestroyAESInfo</a></h2>
212<div class="doc-section">
213
214<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p>
215
216<p>The format of the DestroyAESInfo method is:</p>
217
218<pre class="code">
219 AESInfo *DestroyAESInfo(AESInfo *aes_info)
220</pre>
221
222<p>A description of each parameter follows:</p>
223
224<h5>aes_info</h5>
225<p>the cipher context.</p>
226
227 </div>
228<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
229_8c.html" id="EncipherAESBlock">EncipherAESBlock</a></h2>
230<div class="doc-section">
231
232<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p>
233
234<p>The format of the EncipherAESBlock method is:</p>
235
236<pre class="code">
237 void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
238 unsigned char *ciphertext)
239</pre>
240
241<p>A description of each parameter follows:</p>
242
243<h5>aes_info</h5>
244<p>the cipher context.</p>
245
246<h5>plaintext</h5>
247<p>the plain text.</p>
248
249<h5>ciphertext</h5>
250<p>the cipher text.</p>
251
252 </div>
253<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
254_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
255<div class="doc-section">
256
257<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
258
259<p>The format of the PasskeyDecipherImage method is:</p>
260
261<pre class="code">
262 MagickBooleanType PasskeyDecipherImage(Image *image,
263 const StringInfo *passkey,ExceptionInfo *exception)
264 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
265 ExceptionInfo *exception)
266</pre>
267
268<p>A description of each parameter follows:</p>
269
270<h5>image</h5>
271<p>the image.</p>
272
273<h5>passphrase</h5>
274<p>decipher cipher pixels with this passphrase.</p>
275
276<h5>passkey</h5>
277<p>decrypt cipher pixels with this passkey.</p>
278
279<h5>exception</h5>
280<p>return any errors or warnings in this structure.</p>
281
282 </div>
283<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
284_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
285<div class="doc-section">
286
287<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
288
289<p>The format of the PasskeyEncipherImage method is:</p>
290
291<pre class="code">
292 MagickBooleanType PasskeyEncipherImage(Image *image,
293 const StringInfo *passkey,ExceptionInfo *exception)
294 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
295 ExceptionInfo *exception)
296</pre>
297
298<p>A description of each parameter follows:</p>
299
300<h5>image</h5>
301<p>the image.</p>
302
303<h5>passphrase</h5>
304<p>encipher pixels with this passphrase.</p>
305
306<h5>passkey</h5>
307<p>decrypt cipher pixels with this passkey.</p>
308
309<h5>exception</h5>
310<p>return any errors or warnings in this structure.</p>
311
312 </div>
313<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
314_8c.html" id="SetAESKey">SetAESKey</a></h2>
315<div class="doc-section">
316
317<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>
318
319<p>The format of the SetAESKey method is:</p>
320
321<pre class="code">
322 SetAESKey(AESInfo *aes_info,const StringInfo *key)
323</pre>
324
325<p>A description of each parameter follows:</p>
326
327<h5>aes_info</h5>
328<p>the cipher context.</p>
329
330<h5>key</h5>
331<p>the key.</p>
332
333 </div>
334<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
335_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
336<div class="doc-section">
337
338<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
339
340<p>The format of the PasskeyDecipherImage method is:</p>
341
342<pre class="code">
343 MagickBooleanType PasskeyDecipherImage(Image *image,
344 const StringInfo *passkey,ExceptionInfo *exception)
345 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
346 ExceptionInfo *exception)
347</pre>
348
349<p>A description of each parameter follows:</p>
350
351<h5>image</h5>
352<p>the image.</p>
353
354<h5>passphrase</h5>
355<p>decipher cipher pixels with this passphrase.</p>
356
357<h5>passkey</h5>
358<p>decrypt cipher pixels with this passkey.</p>
359
360<h5>exception</h5>
361<p>return any errors or warnings in this structure.</p>
362
363 </div>
364<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
365_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
366<div class="doc-section">
367
368<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
369
370<p>The format of the PasskeyEncipherImage method is:</p>
371
372<pre class="code">
373 MagickBooleanType PasskeyEncipherImage(Image *image,
374 const StringInfo *passkey,ExceptionInfo *exception)
375 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
376 ExceptionInfo *exception)
377</pre>
378
379<p>A description of each parameter follows:</p>
380
381<h5>passphrase</h5>
382<p>decipher cipher pixels with this passphrase.</p>
383
384<h5>passkey</h5>
385<p>decrypt cipher pixels with this passkey.</p>
386
387<h5>exception</h5>
388<p>return any errors or warnings in this structure.</p>
389
390 </div>
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