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173
cristy307ba182010-12-25 01:00:34 +0000174<h1>Module cipher
175 Methods</h1>
cristy3ed852e2009-09-05 21:47:34 +0000176<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>
177
178<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
179_8c.html" target="source" name="AcquireAESInfo">AcquireAESInfo</a></h2>
180<div class="doc-section">
181
182<p>AcquireAESInfo() allocate the AESInfo structure.</p></ol>
183
184<p>The format of the AcquireAESInfo method is:</p>
185
186<pre class="code">
187 AESInfo *AcquireAESInfo(void)
188</pre>
189
190 </div>
191<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
192_8c.html" target="source" name="DestroyAESInfo">DestroyAESInfo</a></h2>
193<div class="doc-section">
194
195<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p></ol>
196
197<p>The format of the DestroyAESInfo method is:</p>
198
199<pre class="code">
200 AESInfo *DestroyAESInfo(AESInfo *aes_info)
201</pre>
202
203<p>A description of each parameter follows:</p></ol>
204
205<h5>aes_info</h5>
206<ol><p>the cipher context.</p></ol>
207
208 </div>
209<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
210_8c.html" target="source" name="EncipherAESBlock">EncipherAESBlock</a></h2>
211<div class="doc-section">
212
213<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p></ol>
214
215<p>The format of the EncipherAESBlock method is:</p>
216
217<pre class="code">
218 void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
219 unsigned char *ciphertext)
220</pre>
221
222<p>A description of each parameter follows:</p></ol>
223
224<h5>aes_info</h5>
225<ol><p>the cipher context.</p></ol>
226
227<h5>plaintext</h5>
228<ol><p>the plain text.</p></ol>
229
230<h5>ciphertext</h5>
231<ol><p>the cipher text.</p></ol>
232
233 </div>
234<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
235_8c.html" target="source" name="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
236<div class="doc-section">
237
238<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p></ol>
239
240<p>The format of the PasskeyDecipherImage method is:</p>
241
242<pre class="code">
243 MagickBooleanType PasskeyDecipherImage(Image *image,
244 const StringInfo *passkey,ExceptionInfo *exception)
245 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
246 ExceptionInfo *exception)
247</pre>
248
249<p>A description of each parameter follows:</p></ol>
250
251<h5>image</h5>
252<ol><p>the image.</p></ol>
253
254<h5>passphrase</h5>
255<ol><p>decipher cipher pixels with this passphrase.</p></ol>
256
257<h5>passkey</h5>
258<ol><p>decrypt cipher pixels with this passkey.</p></ol>
259
260<h5>exception</h5>
261<ol><p>return any errors or warnings in this structure.</p></ol>
262
263 </div>
264<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
265_8c.html" target="source" name="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
266<div class="doc-section">
267
268<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p></ol>
269
270<p>The format of the PasskeyEncipherImage method is:</p>
271
272<pre class="code">
273 MagickBooleanType PasskeyEncipherImage(Image *image,
274 const StringInfo *passkey,ExceptionInfo *exception)
275 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
276 ExceptionInfo *exception)
277</pre>
278
279<p>A description of each parameter follows:</p></ol>
280
281<h5>image</h5>
282<ol><p>the image.</p></ol>
283
284<h5>passphrase</h5>
285<ol><p>encipher pixels with this passphrase.</p></ol>
286
287<h5>passkey</h5>
288<ol><p>decrypt cipher pixels with this passkey.</p></ol>
289
290<h5>exception</h5>
291<ol><p>return any errors or warnings in this structure.</p></ol>
292
293 </div>
294<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
295_8c.html" target="source" name="SetAESKey">SetAESKey</a></h2>
296<div class="doc-section">
297
298<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></ol>
299
300<p>The format of the SetAESKey method is:</p>
301
302<pre class="code">
303 SetAESKey(AESInfo *aes_info,const StringInfo *key)
304</pre>
305
306<p>A description of each parameter follows:</p></ol>
307
308<h5>aes_info</h5>
309<ol><p>the cipher context.</p></ol>
310
311<h5>key</h5>
312<ol><p>the key.</p></ol>
313
314 </div>
315<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
316_8c.html" target="source" name="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
317<div class="doc-section">
318
319<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p></ol>
320
321<p>The format of the PasskeyDecipherImage method is:</p>
322
323<pre class="code">
324 MagickBooleanType PasskeyDecipherImage(Image *image,
325 const StringInfo *passkey,ExceptionInfo *exception)
326 MagickBooleanType DecipherImage(Image *image,const char *passphrase,
327 ExceptionInfo *exception)
328</pre>
329
330<p>A description of each parameter follows:</p></ol>
331
332<h5>image</h5>
333<ol><p>the image.</p></ol>
334
335<h5>passphrase</h5>
336<ol><p>decipher cipher pixels with this passphrase.</p></ol>
337
338<h5>passkey</h5>
339<ol><p>decrypt cipher pixels with this passkey.</p></ol>
340
341<h5>exception</h5>
342<ol><p>return any errors or warnings in this structure.</p></ol>
343
344 </div>
345<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher
346_8c.html" target="source" name="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
347<div class="doc-section">
348
349<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p></ol>
350
351<p>The format of the PasskeyEncipherImage method is:</p>
352
353<pre class="code">
354 MagickBooleanType PasskeyEncipherImage(Image *image,
355 const StringInfo *passkey,ExceptionInfo *exception)
356 MagickBooleanType EncipherImage(Image *image,const char *passphrase,
357 ExceptionInfo *exception)
358</pre>
359
360<p>A description of each parameter follows:</p></ol>
361
362<h5>passphrase</h5>
363<ol><p>decipher cipher pixels with this passphrase.</p></ol>
364
365<h5>passkey</h5>
366<ol><p>decrypt cipher pixels with this passkey.</p></ol>
367
368<h5>exception</h5>
369<ol><p>return any errors or warnings in this structure.</p></ol>
370
371 </div>
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