PHP RC4加密Demo
PHP的源码和前面发 的那个JAVA的RC4加密基本连参数都是一样的,PHP加密后两边都可以直接解密。
源码:
<?php function rc4($key_str, $data_str) { // convert input string(s) to array(s) $key = array (); $data = array (); for($i = 0; $i < strlen ( $key_str ); $i ++) { $key [] = ord ( $key_str {$i} ); } for($i = 0; $i < strlen ( $data_str ); $i ++) { $data [] = ord ( $data_str {$i} ); } // prepare key $state = array ( 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31, 32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47, 48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63, 64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79, 80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95, 96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111, 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207, 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223, 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239, 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255 ); $len = count ( $key ); $index1 = $index2 = 0; for($counter = 0; $counter < 256; $counter ++) { $index2 = ($key [$index1] + $state [$counter] + $index2) % 256; $tmp = $state [$counter]; $state [$counter] = $state [$index2]; $state [$index2] = $tmp; $index1 = ($index1 + 1) % $len; } // rc4 $len = count ( $data ); $x = $y = 0; for($counter = 0; $counter < $len; $counter ++) { $x = ($x + 1) % 256; $y = ($state [$x] + $y) % 256; $tmp = $state [$x]; $state [$x] = $state [$y]; $state [$y] = $tmp; $data [$counter] ^= $state [($state [$x] + $state [$y]) % 256]; } // convert output back to a string $data_str = ""; for($i = 0; $i < $len; $i ++) { $data_str .= chr ( $data [$i] ); //echo $data_str."---".$data [$i]."\r\n"; } return $data_str; } ?>