PHP中如何使用DES和AES加密

1、DES加密实例

//DES加密

public static function encrypt($input, $key) {

    $size = mcrypt_get_block_size('des', 'cbc');//使用CBC加密模式

    $input = Banktest::pkcs5_pad($input, $size);

    $td = mcrypt_module_open('des', '', 'cbc', '');

    $iv = 'LTtlK61d';//偏移量（根据实际情况赋值）

    mcrypt_generic_init($td, $key, $iv);

    $data = mcrypt_generic($td, $input);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);

    $data = base64_encode($data);

    return $data;

}

//填充模式

private static function pkcs5_pad ($text, $blocksize){

    $pad = $blocksize - (strlen($text) % $blocksize);

    return $text . str_repeat(chr($pad), $pad);

}

2、AES加密实例

public function encrypt($input, $key) {

    $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);

    $input =$this->pkcs5_pad($input, $size);

    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');

    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

    mcrypt_generic_init($td, $key, $iv);

    $data = mcrypt_generic($td, $input);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);

    $data = base64_encode($data);

    return $data;

}

public function pkcs5_pad ($text, $blocksize){

    $pad = $blocksize - (strlen($text) % $blocksize);

    return $text . str_repeat(chr($pad), $pad);

}

public function decrypt($dStr, $dKey) {

    $decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$dKey,base64_decode($dStr),MCRYPT_MODE_ECB);

    $dec_s = strlen($decrypted);

    $padding = ord($decrypted[$dec_s-1]);

    $decrypted = substr($decrypted, 0, -$padding);

    return $decrypted;

}