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mcrypt_generic

mcrypt_generic

This function encrypts data

string **mcrypt_generic** resource $td string $data

This function encrypts data. The data is padded with "" to make sure the length of the data is n * blocksize. This function returns the encrypted data. Note that the length of the returned string can in fact be longer than the input, due to the padding of the data. \0

If you want to store the encrypted data in a database make sure to store the entire string as returned by mcrypt_generic, or the string will not entirely decrypt properly. If your original string is 10 characters long and the block size is 8 (use to determine the blocksize), you would need at least 16 characters in your database field. Note the string returned by will be 16 characters as well...use rtrim($str, "\0") to remove the padding. mcrypt_enc_get_block_size``mdecrypt_generic

If you are for example storing the data in a MySQL database remember that varchar fields automatically have trailing spaces removed during insertion. As encrypted data can end in a space (ASCII 32), the data will be damaged by this removal. Store data in a tinyblob/tinytext (or larger) field instead.

tdThe encryption descriptor.

  The encryption handle should always be initialized with
   with a key and an IV before
  calling this function. Where the encryption is done, you should free the
  encryption buffers by calling .
  See  for an example.
 `mcrypt_generic_init``mcrypt_generic_deinit``mcrypt_module_open`

dataThe data to encrypt.

Returns the encrypted data.

mdecrypt_generic``mcrypt_generic_init``mcrypt_generic_deinit

Vorige ← mcrypt_generic_init Volgende mcrypt_get_block_size →

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