mcrypt_generic_init

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_generic_init — This function initializes all buffers needed for encryption

Warning

Esta função tornou-se DEFASADA a partir do PHP 7.1.0 e foi REMOVIDA a partir do PHP 7.2.0. O uso desta função é fortemente desencorajado.

Descrição

mcrypt_generic_init(resource $td, string $key, string $iv): int

You need to call this function before every call to mcrypt_generic() or mdecrypt_generic().

Parâmetros

td

The encryption descriptor.

key

The maximum length of the key should be the one obtained by calling mcrypt_enc_get_key_size() and every value smaller than this is legal.

iv

The IV should normally have the size of the algorithms block size, but you must obtain the size by calling mcrypt_enc_get_iv_size(). IV is ignored in ECB. IV MUST exist in CFB, CBC, STREAM, nOFB and OFB modes. It needs to be random and unique (but not secret). The same IV must be used for encryption/decryption. If you do not want to use it you should set it to zeros, but this is not recommended.

Valor Retornado

The function returns a negative value on error: -3 when the key length was incorrect, -4 when there was a memory allocation problem and any other return value is an unknown error. If an error occurs a warning will be displayed accordingly. false is returned if incorrect parameters were passed.

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