I just had a couple questions about these, since I'm too lazy to find out for myself :)

1. Where do they come from? Are they stored/generated at runtime/downloaded? I suspect that the .dll is stored in the .mpq but I'm not really sure...

2. What is the difference between IX86ver1.dll/IX86ver2.mpq/etc? As far as I could tell, the checksum function is the exact same (although I never tested this theory, but the assembly looks the same)

3. This isn't about the actual files, but when the checksum function is called it's passed a hMPQ, but I can't find where it comes from, but I'm guessing it's from the corrosponding IX86ver?.mpq file. Am I right in assuming that?

Thanks for any help!
-iago

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
I just had a couple questions about these, since I'm too lazy to find out for myself :)

1. Where do they come from? Are they stored/generated at runtime/downloaded? I suspect that the .dll is stored in the .mpq but I'm not really sure...
[/quote]
I believe the client compares it's cached version to the FILETIME structure sent in SID_AUTH_INFO. If it has the same FILETIME, then it uses the cached one; else it downloads the mpq in the same packet from the server. The dll that exports CheckRevision is in the MPQ along with another file which I do not know the purpose of.

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
2. What is the difference between IX86ver1.dll/IX86ver2.mpq/etc? As far as I could tell, the checksum function is the exact same (although I never tested this theory, but the assembly looks the same)
[/quote]
One (and only?) difference is the intial "CheckSumKey". There may be other differences but from what I know the algorithm is the same for each dll. As far the the other file in the MPQ, the contents differ.

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
3. This isn't about the actual files, but when the checksum function is called it's passed a hMPQ, but I can't find where it comes from, but I'm guessing it's from the corrosponding IX86ver?.mpq file. Am I right in assuming that?
[/quote]
I'm not sure what you're talking about, but maybe it's the handle from LoadLibrary("IX86ver0.dll");? Or it could be some internal handle that Storm.dll assigns the MPQ?

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
Thanks for any help!
-iago
[/quote]

No problem, HTH.

[quote author=kamakazie link=board=17;threadid=1501;start=0#msg11292 date=1054440606]
[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
I just had a couple questions about these, since I'm too lazy to find out for myself :)

1. Where do they come from? Are they stored/generated at runtime/downloaded? I suspect that the .dll is stored in the .mpq but I'm not really sure...
[/quote]
I believe the client compares it's cached version to the FILETIME structure sent in SID_AUTH_INFO. If it has the same FILETIME, then it uses the cached one; else it downloads the mpq in the same packet from the server. The dll that exports CheckRevision is in the MPQ along with another file which I do not know the purpose of.

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
2. What is the difference between IX86ver1.dll/IX86ver2.mpq/etc? As far as I could tell, the checksum function is the exact same (although I never tested this theory, but the assembly looks the same)
[/quote]
One (and only?) difference is the intial "CheckSumKey". There may be other differences but from what I know the algorithm is the same for each dll. As far the the other file in the MPQ, the contents differ.

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
3. This isn't about the actual files, but when the checksum function is called it's passed a hMPQ, but I can't find where it comes from, but I'm guessing it's from the corrosponding IX86ver?.mpq file. Am I right in assuming that?
[/quote]
I'm not sure what you're talking about, but maybe it's the handle from LoadLibrary("IX86ver0.dll");? Or it could be some internal handle that Storm.dll assigns the MPQ?

[quote author=iago link=board=17;threadid=1501;start=0#msg11290 date=1054438088]
Thanks for any help!
-iago
[/quote]

No problem, HTH.
[/quote]
The other file in the MPQ is (signature), used by SFileAuthenticateArchive with CryptoAPI to verify that the archive was signed by Blizzard and has not been tampered with.