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This Class uses three algorithms for encryption
BLOWFISH
SAFERPLUS
SERPENT
Check out whether ur mcrypt module supports these algorithms
Please use rand or srand to select the type of the algo and store the IV ,Key and rand in the database
for more design changes or suggestions mail me @ veevakan@email.com
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<?php
class encrypt
{
function enc_str($cipher,$key,$string)
{
if ($cipher==1)
{
$iv=mcrypt_create_iv (mcrypt_get_iv_size (MCRYPT_BLOWFISH,MCRYPT_MODE_ECB),MCRYPT_RAND);
$cryptext=mcrypt_encrypt (MCRYPT_RIJNDAEL_256,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else if ($cipher==2)
{
$iv=mcrypt_create_iv (mcrypt_get_iv_size (MCRYPT_SAFERPLUS,MCRYPT_MODE_ECB),MCRYPT_RAND);
$cryptext=mcrypt_encrypt (MCRYPT_SAFERPLUS,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else if ($cipher=3)
{
$iv=mcrypt_create_iv (mcrypt_get_iv_size (MCRYPT_SERPENT,MCRYPT_MODE_ECB),MCRYPT_RAND);
$cryptext=mcrypt_encrypt (MCRYPT_SERPENT,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else
{
$iv=mcrypt_create_iv (mcrypt_get_iv_size (MCRYPT_XTEA,MCRYPT_MODE_ECB),MCRYPT_RAND);
$cryptext=mcrypt_encrypt (MCRYPT_XTEA,$key, $string, MCRYPT_MODE_ECB, $iv);
}
return $cryptext;
}
function dec_str($cipher,$key,$string,$iv)
{
if ($cipher==1)
{
$dec_text=mcrypt_decrypt (MCRYPT_RIJNDAEL_256,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else if ($cipher==2)
{
$dec_text=mcrypt_decrypt (MCRYPT_SAFERPLUS,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else if ($cipher==3)
{
$dec_text=mcrypt_encrypt (MCRYPT_SERPENT,$key, $string, MCRYPT_MODE_ECB, $iv);
}
else
{
$dec_text=mcrypt_encrypt (MCRYPT_XTEA,$key, $string, MCRYPT_MODE_ECB, $iv);
}
return $dec_text;
}
}
?> | |
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