Are there any assurances that function local variables are protected from code
calling the function?
For example, I would like to provide some cryptographic functions such as
function org_secure_string($string) {
$org_key = "a very random key";
return hash($string, $key);
}
function org_reveal_string($hash) {
$org_key = "a very random key";
return unhash($hash, $key);
}
I'd like to protect $org_key from any code following or using these functions.
I've not yet found a way that it can be revealed, but I wonder if anyone here
can give me a definitive answer whether or not it is possible.
Ben
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