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"> 68 AESInfo *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"> 78 AESInfo *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"> 100 void 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"> 131 MagickBooleanType PasskeyDecipherImage(Image *image, 132 const StringInfo *passkey,ExceptionInfo *exception) 133 MagickBooleanType 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"> 168 MagickBooleanType PasskeyEncipherImage(Image *image, 169 const StringInfo *passkey,ExceptionInfo *exception) 170 MagickBooleanType 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"> 205 SetAESKey(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"> 231 MagickBooleanType PasskeyDecipherImage(Image *image, 232 const StringInfo *passkey,ExceptionInfo *exception) 233 MagickBooleanType 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"> 268 MagickBooleanType PasskeyEncipherImage(Image *image, 269 const StringInfo *passkey,ExceptionInfo *exception) 270 MagickBooleanType 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
