## AcquireAESInfo

AcquireAESInfo() allocate the AESInfo structure.

The format of the AcquireAESInfo method is:

      AESInfo *AcquireAESInfo(void)

## DecipherImage

DecipherImage() converts cipher pixels to plain pixels.

The format of the DecipherImage method is:

      MagickBooleanType DecipherImage(Image *image,const char *passphrase,
        ExceptionInfo *exception)

A description of each parameter follows:

##### image

the image.

##### passphrase

decipher cipher pixels with this passphrase.

##### exception

return any errors or warnings in this structure.

## DestroyAESInfo

DestroyAESInfo() zeros memory associated with the AESInfo structure.

The format of the DestroyAESInfo method is:

      AESInfo *DestroyAESInfo(AESInfo *aes_info)

A description of each parameter follows:

##### aes_info

the cipher context.

## EncipherImage

EncipherImage() converts pixels to cipher-pixels.

The format of the EncipherImage method is:

      MagickBooleanType EncipherImage(Image *image,const char *passphrase,
        ExceptionInfo *exception)

A description of each parameter follows:

##### image

the image.

##### passphrase

encipher pixels with this passphrase.

##### exception

return any errors or warnings in this structure.

## EncipherAESBlock

EncipherAESBlock() enciphers a single block of plaintext to produce a block of ciphertext.

The format of the EncipherAESBlock method is:

      void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
        unsigned char *ciphertext)

A description of each parameter follows:

##### aes_info

the cipher context.

##### plaintext

the plain text.

##### ciphertext

the cipher text.

## SetAESKey

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.

The format of the SetAESKey method is:

      SetAESKey(AESInfo *aes_info,const StringInfo *key)

A description of each parameter follows:

##### aes_info

the cipher context.

##### key

the key.

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