时间：2021-07-01 10:21:17 帮助过：24人阅读
<?php
//--------第一种AES-CBC加密方案--------
//仅为理解之用
$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); #128位 = 16字节 iv必须16字节
$key128 = '1234567890123456';
$iv = '1234567890123456';
$cleartext = 'hello'; #待加密的字符串
if (mcrypt_generic_init($cipher, $key128, $iv) != -1)
{
// PHP pads with NULL bytes if $cleartext is not a multiple of the block size..
//如果$cleartext不是128位也就是16字节的倍数，补充NULL字符满足这个条件，返回的结果的长度一样
$cipherText = mcrypt_generic($cipher,$cleartext );
mcrypt_generic_deinit($cipher);
// Display the result in hex.
//很明显，结果也是16字节的倍数.1个字节用两位16进制表示，所以下面输出的是32的倍数位16进制的字符串
echo '第一种AES加密方案:<br>';
printf("128-bit encrypted result:\n%s\n\n",bin2hex($cipherText));
echo '<br>';echo '<br>';
}
//--------第一种AES加密方案--------
?>
</pre>
转载来源：http://www.chilkatsoft.com/p/php_aes.asp
http://www.cnblogs.com/adylee/archive/2007/09/14/893438.html
转载来源：http://blog.csdn.net/shushengsky/archive/2009/12/13/4961861.aspx
<pre>
<?php
//--------第二种AES-ECB加密方案--------
//加密
echo '第二种AES加密方案:<br>';
$key = '1234567890123456';
$content = 'hello';
$padkey = pad2Length($key,16);
$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv_size = mcrypt_enc_get_iv_size($cipher);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); #IV自动生成？
echo '自动生成iv的长度:'.strlen($iv).'位:'.bin2hex($iv).'<br>';
if (mcrypt_generic_init($cipher, pad2Length($key,16), $iv) != -1)
{
// PHP pads with NULL bytes if $content is not a multiple of the block size..
$cipherText = mcrypt_generic($cipher,pad2Length($content,16) );
mcrypt_generic_deinit($cipher);
mcrypt_module_close($cipher);
// Display the result in hex.
printf("128-bit encrypted result:\n%s\n\n",bin2hex($cipherText));
print("<br />");
}
//解密
$mw = bin2hex($cipherText);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
if (mcrypt_generic_init($td, $padkey, $iv) != -1)
{
$p_t = mdecrypt_generic($td, hexToStr($mw));
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$p_t = trimEnd($p_t);
echo '解密:';
print($p_t);
print("<br />");
print(bin2hex($p_t));
echo '<br><br>';
}
//将$text补足$padlen倍数的长度
function pad2Length($text, $padlen){
$len = strlen($text)%$padlen;
$res = $text;
$span = $padlen-$len;
for($i=0; $i<$span; $i++){
$res .= chr($span);
}
return $res;
}
//将解密后多余的长度去掉(因为在加密的时候 补充长度满足block_size的长度)
function trimEnd($text){
$len = strlen($text);
$c = $text[$len-1];
if(ord($c) <$len){
for($i=$len-ord($c); $i<$len; $i++){
if($text[$i] != $c){
return $text;
}
}
return substr($text, 0, $len-ord($c));
}
return $text;
}
//16进制的转为2进制字符串
function hexToStr($hex)
{
$bin="";
for($i=0; $i<strlen($hex)-1; $i+=2)
{
$bin.=chr(hexdec($hex[$i].$hex[$i+1]));
}
return $bin;
}
//--------第二种AES加密方案--------
</pre>
<pre>
<?php
//--------第三种AES-ECB加密方案--------
echo '第三种AES加密方案:<br>';
$key = '1234567890123456';
$key = pad2Length($key,16);
$iv = 'asdff';
$content = 'hello';
$content = pad2Length($content,16);
$AESed = bin2hex( mcrypt_encrypt(MCRYPT_RIJNDAEL_128,$key,$content,MCRYPT_MODE_ECB,$iv) ); #加密
echo "128-bit encrypted result:".$AESed.'<br>';
$jiemi = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,hexToStr($AESed),MCRYPT_MODE_ECB,$iv); #解密
echo '解密:';
echo trimEnd($jiemi);
//--------第三种AES加密方案--------
?>
#KEY长度无限制，IV长度必须是block_size的倍数
#如果是MCRYPT_MODE_ECB加密，结果与KEY有关，与IV无关
#如果是MCRYPT_MODE_CBC加密，结果与KEY有关，与IV有关