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PHP AES加密解密算法
<?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-------- ?>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
<?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
<pre lang="php">
<?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
//--------第四种AES加密/解密方案 CBC模式,128-bit--------
/* * 实现AES加密 * $str : 要加密的字符串 * $keys : 加密密钥 * $iv : 加密向量 * $cipher_alg : 加密方式 */ function ecryptdString($str,$keys="6461772803150152",$iv="8105547186756005",$cipher_alg=MCRYPT_RIJNDAEL_128){ $encrypted_string= bin2hex(mcrypt_encrypt($cipher_alg,$keys, $str, MCRYPT_MODE_CBC,$iv)); return$encrypted_string; } /* * 实现AES解密 * $str : 要解密的字符串 * $keys : 加密密钥 * $iv : 加密向量 * $cipher_alg : 加密方式 */ functiondecryptStrin($str,$keys="6461772803150152",$iv="8105547186756005",$cipher_alg=MCRYPT_RIJNDAEL_128){ $decrypted_string= mcrypt_decrypt($cipher_alg,$keys, pack("H*",$str),MCRYPT_MODE_CBC,$iv); return$decrypted_string; }