The STR_ENCRYPT/STR_ENCRYPTW macro allows you to mark regions of code where all referenced strings inside the region will be encrypted in protection time and decrypted in runtime when required by the target application. The decryption is performed inside the SecureEngine Virtual Machine and the location of the decrypted string is different from the original one in the unprotected application. The original location of the string is destroyed and never used again in the protected application.
If you are using Unicode strings in your application, you have to use the macro STR_ENCRYPTW which can process Unicode strings.
NOTE: The current version of SecureEgine® does not support this macro for .NET languages or Visual Basic compiled in PCode mode.
{$I StrEncrypt_Start.inc}
// your code goes here
{$I StrEncrypt_End.inc} |
STR_ENCRYPT_START
// your code goes here
STR_ENCRYPT_END |
Call VarPtr("STR_ENCRYPT_START")
' your code goes here
Call VarPtr("STR_ENCRYPT_END") |
Remarks
For further protection you can put a VM macro around the "STR_ENCRYPT" macro, so all your code area where your strings are used is also virtualized. Example:
VM_START
STR_ENCRYPT_START
' your code goes here
STR_ENCRYPT_END
VM_END |
There are some internal options that can be added to increase the protection of the STR_ENCRYPT macro. You can add the following entries in the Advanced Options panel:
•OPTION_MACROS_ENCRYPT_STRINGS_DECRYPT_ON_HEAP=YES
The string will be decrypted on an allocated block in the heap
•OPTION_MACROS_ENCRYPT_STRINGS_REENCRYPT=YES
The decrypted string on the heap will be destroyed when the STR_ENCRYPT_END marker is executed