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<? | |
function aes128_cbc_encrypt($key, $data, $iv) { | |
if(16 !== strlen($key)) $key = hash('MD5', $key, true); | |
if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true); | |
$padding = 16 - (strlen($data) % 16); | |
$data .= str_repeat(chr($padding), $padding); | |
return mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv); | |
} | |
function aes256_cbc_encrypt($key, $data, $iv) { | |
if(32 !== strlen($key)) $key = hash('SHA256', $key, true); | |
if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true); | |
$padding = 16 - (strlen($data) % 16); | |
$data .= str_repeat(chr($padding), $padding); | |
return mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv); | |
} | |
function aes128_cbc_decrypt($key, $data, $iv) { | |
if(16 !== strlen($key)) $key = hash('MD5', $key, true); | |
if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true); | |
$data = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv); | |
$padding = ord($data[strlen($data) - 1]); | |
return substr($data, 0, -$padding); | |
} | |
function aes256_cbc_decrypt($key, $data, $iv) { | |
if(32 !== strlen($key)) $key = hash('SHA256', $key, true); | |
if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true); | |
$data = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv); | |
$padding = ord($data[strlen($data) - 1]); | |
return substr($data, 0, -$padding); | |
} |
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