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allwinner_a64/android/external/ImageMagick/www/api/cipher.php
August 71b83c22f1 upload android base code part2
2018-08-08 16:14:42 +08:00

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<head>
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
<title>ImageMagick: MagickCore, C API for ImageMagick: Convert to and from Cipher Pixels</title>
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<p class="text-center"><a href="cipher.php#AcquireAESInfo">AcquireAESInfo</a> &bull; <a href="cipher.php#DestroyAESInfo">DestroyAESInfo</a> &bull; <a href="cipher.php#EncipherAESBlock">EncipherAESBlock</a> &bull; <a href="cipher.php#PasskeyDecipherImage">PasskeyDecipherImage</a> &bull; <a href="cipher.php#PasskeyEncipherImage">PasskeyEncipherImage</a> &bull; <a href="cipher.php#SetAESKey">SetAESKey</a> &bull; <a href="cipher.php#PasskeyDecipherImage">PasskeyDecipherImage</a> &bull; <a href="cipher.php#PasskeyEncipherImage">PasskeyEncipherImage</a></p>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="AcquireAESInfo">AcquireAESInfo</a></h2>
<p>AcquireAESInfo() allocate the AESInfo structure.</p>
<p>The format of the AcquireAESInfo method is:</p>
<pre class="text">
AESInfo *AcquireAESInfo(void)
</pre>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="DestroyAESInfo">DestroyAESInfo</a></h2>
<p>DestroyAESInfo() zeros memory associated with the AESInfo structure.</p>
<p>The format of the DestroyAESInfo method is:</p>
<pre class="text">
AESInfo *DestroyAESInfo(AESInfo *aes_info)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>aes_info</dt>
<dd>the cipher context. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="EncipherAESBlock">EncipherAESBlock</a></h2>
<p>EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.</p>
<p>The format of the EncipherAESBlock method is:</p>
<pre class="text">
void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
unsigned char *ciphertext)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>aes_info</dt>
<dd>the cipher context. </dd>
<dd> </dd>
<dt>plaintext</dt>
<dd>the plain text. </dd>
<dd> </dd>
<dt>ciphertext</dt>
<dd>the cipher text. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
<p>The format of the PasskeyDecipherImage method is:</p>
<pre class="text">
MagickBooleanType PasskeyDecipherImage(Image *image,
const StringInfo *passkey,ExceptionInfo *exception)
MagickBooleanType DecipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>image</dt>
<dd>the image. </dd>
<dd> </dd>
<dt>passphrase</dt>
<dd>decipher cipher pixels with this passphrase. </dd>
<dd> </dd>
<dt>passkey</dt>
<dd>decrypt cipher pixels with this passkey. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
<p>The format of the PasskeyEncipherImage method is:</p>
<pre class="text">
MagickBooleanType PasskeyEncipherImage(Image *image,
const StringInfo *passkey,ExceptionInfo *exception)
MagickBooleanType EncipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>image</dt>
<dd>the image. </dd>
<dd> </dd>
<dt>passphrase</dt>
<dd>encipher pixels with this passphrase. </dd>
<dd> </dd>
<dt>passkey</dt>
<dd>decrypt cipher pixels with this passkey. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="SetAESKey">SetAESKey</a></h2>
<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>
<p>The format of the SetAESKey method is:</p>
<pre class="text">
SetAESKey(AESInfo *aes_info,const StringInfo *key)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>aes_info</dt>
<dd>the cipher context. </dd>
<dd> </dd>
<dt>key</dt>
<dd>the key. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyDecipherImage">PasskeyDecipherImage</a></h2>
<p>PasskeyDecipherImage() converts cipher pixels to plain pixels.</p>
<p>The format of the PasskeyDecipherImage method is:</p>
<pre class="text">
MagickBooleanType PasskeyDecipherImage(Image *image,
const StringInfo *passkey,ExceptionInfo *exception)
MagickBooleanType DecipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>image</dt>
<dd>the image. </dd>
<dd> </dd>
<dt>passphrase</dt>
<dd>decipher cipher pixels with this passphrase. </dd>
<dd> </dd>
<dt>passkey</dt>
<dd>decrypt cipher pixels with this passkey. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cipher_8c.html" id="PasskeyEncipherImage">PasskeyEncipherImage</a></h2>
<p>PasskeyEncipherImage() converts pixels to cipher-pixels.</p>
<p>The format of the PasskeyEncipherImage method is:</p>
<pre class="text">
MagickBooleanType PasskeyEncipherImage(Image *image,
const StringInfo *passkey,ExceptionInfo *exception)
MagickBooleanType EncipherImage(Image *image,const char *passphrase,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>passphrase</dt>
<dd>decipher cipher pixels with this passphrase. </dd>
<dd> </dd>
<dt>passkey</dt>
<dd>decrypt cipher pixels with this passkey. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
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