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<title>ImageMagick: MagickCore, C API for ImageMagick: Convert to and from Cipher Pixels</title>
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<p class="navigation-index">[ <a href="#AcquireAESInfo">AcquireAESInfo</a> | <a href="#DecipherImage">DecipherImage</a> | <a href="#DestroyAESInfo">DestroyAESInfo</a> | <a href="#EncipherImage">EncipherImage</a> | <a href="#EncipherAESBlock">EncipherAESBlock</a> | <a href="#SetAESKey">SetAESKey</a> ]</p>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="AcquireAESInfo">AcquireAESInfo</a></h2>
</div>
<p>AcquireAESInfo() allocate the AESInfo structure.</p></ol>
<p>The format of the AcquireAESInfo method is:</p>
<pre class="code">
AESInfo *AcquireAESInfo(void)
</pre>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="DecipherImage">DecipherImage</a></h2>
</div>
<p>DecipherImage() converts cipher pixels to plain pixels.</p></ol>
<p>The format of the DecipherImage method is:</p>
<pre class="code">
MagickBooleanType DecipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>image</h5>
<ol><p>the image.</p></ol>
<h5>passphrase</h5>
<ol><p>decipher cipher pixels with this passphrase.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="DestroyAESInfo">DestroyAESInfo</a></h2>
</div>
<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p></ol>
<p>The format of the DestroyAESInfo method is:</p>
<pre class="code">
AESInfo *DestroyAESInfo(AESInfo *aes_info)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>aes_info</h5>
<ol><p>the cipher context.</p></ol>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="EncipherImage">EncipherImage</a></h2>
</div>
<p>EncipherImage() converts pixels to cipher-pixels.</p></ol>
<p>The format of the EncipherImage method is:</p>
<pre class="code">
MagickBooleanType EncipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>image</h5>
<ol><p>the image.</p></ol>
<h5>passphrase</h5>
<ol><p>encipher pixels with this passphrase.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="EncipherAESBlock">EncipherAESBlock</a></h2>
</div>
<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p></ol>
<p>The format of the EncipherAESBlock method is:</p>
<pre class="code">
void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
unsigned char *ciphertext)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>aes_info</h5>
<ol><p>the cipher context.</p></ol>
<h5>plaintext</h5>
<ol><p>the plain text.</p></ol>
<h5>ciphertext</h5>
<ol><p>the cipher text.</p></ol>
<div style="margin: auto;">
<h2><a href="http://magick.imagemagick.org/viewvc/bin/cgi/viewvc.cgi/svn/ImageMagick/trunk/magick/cipher.c
?view=markup" target="source" name="SetAESKey">SetAESKey</a></h2>
</div>
<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>
<p>The format of the SetAESKey method is:</p>
<pre class="code">
SetAESKey(AESInfo *aes_info,const StringInfo *key)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>aes_info</h5>
<ol><p>the cipher context.</p></ol>
<h5>key</h5>
<ol><p>the key.</p></ol>
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