1 2 3 4 5<!DOCTYPE html> 6<html lang="en"> 7<head> 8 <title>ImageMagick: MagickCore, C API for ImageMagick: Convert to and from Cipher Pixels</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <meta name="description" content="ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. 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href="../index.html">Home</a> 47 <a class="magick-nav-item " href="../binary-releases.html">Download</a> 48 <a class="magick-nav-item " href="../command-line-tools.html">Tools</a> 49 <a class="magick-nav-item " href="../command-line-processing.html">Command-line</a> 50 <a class="magick-nav-item " href="../resources.html">Resources</a> 51 <a class="magick-nav-item " href="api.html">Develop</a> 52 <a class="magick-nav-item " href="http://www.imagemagick.org/script/search.php">Search</a> 53 <a class="magick-nav-item pull-right" href="https://www.imagemagick.org/discourse-server/">Community</a> 54 </nav> 55 </div> 56</div> 57<div class="container"> 58<div class="magick-header"> 59<p class="text-center"><a href="cipher.html#AcquireAESInfo">AcquireAESInfo</a> • <a href="cipher.html#DestroyAESInfo">DestroyAESInfo</a> • <a href="cipher.html#EncipherAESBlock">EncipherAESBlock</a> • <a href="cipher.html#PasskeyDecipherImage">PasskeyDecipherImage</a> • <a href="cipher.html#PasskeyEncipherImage">PasskeyEncipherImage</a> • <a href="cipher.html#SetAESKey">SetAESKey</a> • <a href="cipher.html#PasskeyDecipherImage">PasskeyDecipherImage</a> • <a href="cipher.html#PasskeyEncipherImage">PasskeyEncipherImage</a></p> 60 61<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="AcquireAESInfo">AcquireAESInfo</a></h2> 62 63<p>AcquireAESInfo() allocate the AESInfo structure.</p> 64 65<p>The format of the AcquireAESInfo method is:</p> 66 67<pre class="text"> 68AESInfo *AcquireAESInfo(void) 69</pre> 70 71<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="DestroyAESInfo">DestroyAESInfo</a></h2> 72 73<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p> 74 75<p>The format of the DestroyAESInfo method is:</p> 76 77<pre class="text"> 78AESInfo *DestroyAESInfo(AESInfo *aes_info) 79</pre> 80 81<p>A description of each parameter follows:</p> 82 83<dd> 84</dd> 85 86<dd> </dd> 87<dl class="dl-horizontal"> 88<dt>aes_info</dt> 89<dd>the cipher context. </dd> 90 91<dd> </dd> 92</dl> 93<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="EncipherAESBlock">EncipherAESBlock</a></h2> 94 95<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p> 96 97<p>The format of the EncipherAESBlock method is:</p> 98 99<pre class="text"> 100void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext, 101 unsigned char *ciphertext) 102</pre> 103 104<p>A description of each parameter follows:</p> 105 106<dd> 107</dd> 108 109<dd> </dd> 110<dl class="dl-horizontal"> 111<dt>aes_info</dt> 112<dd>the cipher context. </dd> 113 114<dd> </dd> 115<dt>plaintext</dt> 116<dd>the plain text. </dd> 117 118<dd> </dd> 119<dt>ciphertext</dt> 120<dd>the cipher text. </dd> 121 122<dd> </dd> 123</dl> 124<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2> 125 126<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p> 127 128<p>The format of the PasskeyDecipherImage method is:</p> 129 130<pre class="text"> 131MagickBooleanType PasskeyDecipherImage(Image *image, 132 const StringInfo *passkey,ExceptionInfo *exception) 133MagickBooleanType DecipherImage(Image *image,const char *passphrase, 134 ExceptionInfo *exception) 135</pre> 136 137<p>A description of each parameter follows:</p> 138 139<dd> 140</dd> 141 142<dd> </dd> 143<dl class="dl-horizontal"> 144<dt>image</dt> 145<dd>the image. </dd> 146 147<dd> </dd> 148<dt>passphrase</dt> 149<dd>decipher cipher pixels with this passphrase. </dd> 150 151<dd> </dd> 152<dt>passkey</dt> 153<dd>decrypt cipher pixels with this passkey. </dd> 154 155<dd> </dd> 156<dt>exception</dt> 157<dd>return any errors or warnings in this structure. </dd> 158 159<dd> </dd> 160</dl> 161<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2> 162 163<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p> 164 165<p>The format of the PasskeyEncipherImage method is:</p> 166 167<pre class="text"> 168MagickBooleanType PasskeyEncipherImage(Image *image, 169 const StringInfo *passkey,ExceptionInfo *exception) 170MagickBooleanType EncipherImage(Image *image,const char *passphrase, 171 ExceptionInfo *exception) 172</pre> 173 174<p>A description of each parameter follows:</p> 175 176<dd> 177</dd> 178 179<dd> </dd> 180<dl class="dl-horizontal"> 181<dt>image</dt> 182<dd>the image. </dd> 183 184<dd> </dd> 185<dt>passphrase</dt> 186<dd>encipher pixels with this passphrase. </dd> 187 188<dd> </dd> 189<dt>passkey</dt> 190<dd>decrypt cipher pixels with this passkey. </dd> 191 192<dd> </dd> 193<dt>exception</dt> 194<dd>return any errors or warnings in this structure. </dd> 195 196<dd> </dd> 197</dl> 198<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="SetAESKey">SetAESKey</a></h2> 199 200<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> 201 202<p>The format of the SetAESKey method is:</p> 203 204<pre class="text"> 205SetAESKey(AESInfo *aes_info,const StringInfo *key) 206</pre> 207 208<p>A description of each parameter follows:</p> 209 210<dd> 211</dd> 212 213<dd> </dd> 214<dl class="dl-horizontal"> 215<dt>aes_info</dt> 216<dd>the cipher context. </dd> 217 218<dd> </dd> 219<dt>key</dt> 220<dd>the key. </dd> 221 222<dd> </dd> 223</dl> 224<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2> 225 226<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p> 227 228<p>The format of the PasskeyDecipherImage method is:</p> 229 230<pre class="text"> 231MagickBooleanType PasskeyDecipherImage(Image *image, 232 const StringInfo *passkey,ExceptionInfo *exception) 233MagickBooleanType DecipherImage(Image *image,const char *passphrase, 234 ExceptionInfo *exception) 235</pre> 236 237<p>A description of each parameter follows:</p> 238 239<dd> 240</dd> 241 242<dd> </dd> 243<dl class="dl-horizontal"> 244<dt>image</dt> 245<dd>the image. </dd> 246 247<dd> </dd> 248<dt>passphrase</dt> 249<dd>decipher cipher pixels with this passphrase. </dd> 250 251<dd> </dd> 252<dt>passkey</dt> 253<dd>decrypt cipher pixels with this passkey. </dd> 254 255<dd> </dd> 256<dt>exception</dt> 257<dd>return any errors or warnings in this structure. </dd> 258 259<dd> </dd> 260</dl> 261<h2><a href="http://www.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2> 262 263<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p> 264 265<p>The format of the PasskeyEncipherImage method is:</p> 266 267<pre class="text"> 268MagickBooleanType PasskeyEncipherImage(Image *image, 269 const StringInfo *passkey,ExceptionInfo *exception) 270MagickBooleanType EncipherImage(Image *image,const char *passphrase, 271 ExceptionInfo *exception) 272</pre> 273 274<p>A description of each parameter follows:</p> 275 276<dd> 277</dd> 278 279<dd> </dd> 280<dl class="dl-horizontal"> 281<dt>passphrase</dt> 282<dd>decipher cipher pixels with this passphrase. </dd> 283 284<dd> </dd> 285<dt>passkey</dt> 286<dd>decrypt cipher pixels with this passkey. </dd> 287 288<dd> </dd> 289<dt>exception</dt> 290<dd>return any errors or warnings in this structure. </dd> 291 292<dd> </dd> 293</dl> 294</div> 295 <footer class="magick-footer"> 296 <p><a href="../support.html">Donate</a> • 297 <a href="../sitemap.html">Sitemap</a> • 298 <a href="../links.html">Related</a> • 299 <a href="../architecture.html">Architecture</a> 300</p> 301 <p><a href="cipher.html#">Back to top</a> • 302 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> • 303 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 304 <p><small>© 1999-2016 ImageMagick Studio LLC</small></p> 305 </footer> 306</div><!-- /.container --> 307 308 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 309 <script src="../js/magick.html"></script> 310</div> 311</body> 312</html> 313
