Help with generating serial

[T-rad]

Not for the programmer/vendor, then he will need the RegCode in order to extract from it the RandomBytes and the VolumeSerialNum to generate the corresponding correct key for the registrant.

not exactly, the vendor just requires the VolumeSerialNumber, the rest is just for show.
Any random bytes will work so they do not need to be extracted as the program decrypts the decoded bytes using the first 16 bytes as the key.

var_2C = Proc_23_0_565AB7(Mid(var_3C, 17, Len(var_3C)), Mid(var_3C, 1, 16), 0)

= RC4(data, key)

for example... using 0123456789ABCDEFFEDCBA9876543210 as the random bytes / key and using *-91511383# from the first post, this key should work for that computer

ts3Huirg1Olt00VIn78ZgsVes7y8VZqw1Q==

[TempoMat]

Originally Posted by T-rad

for example... using 0123456789ABCDEFFEDCBA9876543210 as the random bytes / key and using *-91511383# from the first post, this key should work for that computer

ts3Huirg1Olt00VIn78ZgsVes7y8VZqw1Q==

Your key in itself is correct but it will only be accepted if the same random bytes are used for the generation of the RegCode as well.
Meaning that the key is valid if and only if the Regcode is replaced with a newly generated one with your sample random bytes.

The VolumeSerialNum is for sure the only part that is always the same on a target machine but every newly generated RegCode will have a different random bytes which are used in the ActivKey generation as well.

Therefore using different random bytes as in your key with the initial RegCode from post #1 will fail.

As a prove, deleting the string value for RegCode in the registry location: example

[HKEY_CURRENT_USER\Software\VB and VBA Program Settings\NDataScan\Activation]
"Name"="TemPoMat"
"Email"="TemPoMat"
"RegCode"="GIv/lhuqYNCUTPZfPgYG3rM5EtzvsurmsyLeOB0"
"ActivKey"="mP1y4G/RxxQvtIPpV8ZAI/yGoab2NnDSgZWT"

will result in a new RegCode been generated with the same VolumeSerialNum but different random bytes upon re-registration.

I assume this is one of the reasons it is doing the 3 checks.