$str = "测试加密解密"; $key = '^&yang*%#2014!$'; $new_str = my_encrypt($str, $key ); echo '原始:'.$str.'<br />'; echo '加密:'.$new_str.'<br />'; echo '解密:'.my_decrypt($new_str, $key); function my_encrypt($string, $key='') { $key = md5($key); $key_length = strlen($key); $string = substr(md5($string.$key),0,8).$string; $string_length = strlen($string); $rndkey = $box = array(); $result = ''; for($i=0; $i<=255; $i++) { $rndkey[$i] = ord($key[$i%$key_length]); $box[$i] = $i; } for($j=$i=0; $i<256; $i++) { $j = ($j+$box[$i]+$rndkey[$i])%256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } for($a=$j=$i=0; $i<$string_length; $i++) { $a = ($a+1)%256; $j = ($j+$box[$a])%256; $tmp = $box[$a]; $box[$a] = $box[$j]; $box[$j] = $tmp; $result .= chr(ord($string[$i])^($box[($box[$a]+$box[$j])%256])); } return str_replace('=','',base64_encode($result)); } function my_decrypt($string, $key='') { $key = md5($key); $key_length = strlen($key); $string = base64_decode($string); $string_length = strlen($string); $rndkey = $box = array(); $result = ''; for($i=0; $i<=255; $i++) { $rndkey[$i] = ord($key[$i%$key_length]); $box[$i] = $i; } for($j=$i=0; $i<256; $i++) { $j = ($j+$box[$i]+$rndkey[$i])%256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } for($a=$j=$i=0; $i<$string_length; $i++) { $a = ($a+1)%256; $j = ($j+$box[$a])%256; $tmp = $box[$a]; $box[$a] = $box[$j]; $box[$j] = $tmp; $result .= chr(ord($string[$i])^($box[($box[$a]+$box[$j])%256])); } if(substr($result,0,8) == substr(md5(substr($result,8).$key),0,8)) { return substr($result,8); } else { return''; } }
输出结果:
原始:测试加密解密
加密:LoRkIdfstzF0b4MsFHoYQso2MJNIPT7UPB8
解密:测试加密解密