PHP AES Encryption Learning notes

PHP AES Encryption Learning notes

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  ';      printf ("128-bit encrypted result:\n%s\n\n", Bin2Hex ($cipherText));      Echo '
'; Echo '
';  }  --------the first type of AES encryption scheme--------  

Reprint Source: http://www.chilkatsoft.com/p/php_aes.asphttp://www.cnblogs.com/adylee/archive/2007/09/14/893438. HTML Reprint Source: http://blog.csdn.net/shushengsky/archive/2009/12/13/4961861.aspx

 ';  $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 ' automatically generates the length of IV: '. strlen ($IV). ' Bit: '. Bin2Hex ($IV). '
';  if (Mcrypt_generic_init ($cipher, Pad2length ($key, +), $IV)! =-1) {//PHP pads with NULL bytes If $content are 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 ("
");  }//Decryption $MW = Bin2Hex ($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 ' decryption: ';      Print ($p _t); Print ("
");      Print (Bin2Hex ($p _t)); Echo '

';      }//Will $text complement $padlen multiplier length function pad2length ($text, $padlen) {$len = strlen ($text)% $padlen;      $res = $text;      $span = $padlen-$len;      for ($i =0; $i < $span; $i + +) {$res. = Chr ($span);  } return $res;      }//Remove the extra length after decryption (because the length of the block_size is added at the time of encryption) function TrimEnd ($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 $text;       }//16 binary to 2 binary string function Hextostr ($hex) {$bin = ""; for ($i =0; $i
 
   
   
  ';  $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. '  
 '; $jiemi = Mcrypt_decrypt (mcrypt_rijndael_128, $key, Hextostr ($AESed), MCRYPT_MODE_ECB, $IV);  #解密 echo ' decryption: ';  echo trimEnd ($jiemi); --------the third AES encryption scheme--------? > #KEY长度无限制, iv length must be a multiple of block_size # if it is MCRYPT_MODE_ECB encryption, the result is related to the key, and IV is irrelevant if it is mcrypt_
 MODE_CBC encryption, the result is related to key, and IV is related to 
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