BNETDocs Redux

There are three types of CD-Keys, which are used by Battle.net to uniquely identify a game owner as a legitimate client. There are thirteen (13) digit keys, containing only numbers, of which the thirteenth is a checksum to validate the other twelve, used by the original Starcraft product releases. More common are the sixteen (16) digit keys, used by Diablo II, Lord of Destruction, and Warcraft II, consisting of the alphanumeric characters 2, 4 , 6, 7, 8 ,9, B, C, D, E, F, G, H, J, K, M, N, P, R, T, V, W, X, and Z. Finally, there are the twenty-six (26) digit keys currently used by newer releases of Starcraft, Diablo II, and Lord of Destruction, as well as Warcraft III, The Frozen Throne, and Starcraft II. These keys use all the same characters as the sixteen digit ones, with the inclusion of the letter Y.

Each product key is actually the result of an algorithm to encode three values, commonly referred to as the Product, Public, and Private key values. The first two of these values are sent raw to the server as part of the connection, as well as a hash of all three, allowing the server to verify the key as a legitimate match without the opportunity of theft, as is possible in the SID_CDKEY packet where the key is passed as typed.

The Product value is used to identify the key's client, and relate as follows:

• 0x01: 13-digit Starcraft Key
• 0x02: 13-digit Starcraft Key (opened later due to the success and continuing sales of Starcraft)
• 0x04: 16-digit Warcraft II Key
• 0x05: 16-digit Diablo II: Beta Key (defunct)
• 0x05: 26-digit Starcraft II Beta Key (defunct)
• 0x06: 16-digit Diablo II Key
• 0x07: 16-digit Diablo II Key
• 0x09: 16-digit Diablo II: Stress Test Key (defunct)
• 0x0A: 16-digit Diablo II: Lord of Destruction Key
• 0x0C: 16-digit Diablo II: Lord of Destruction Key
• 0x0D: 26-digit Warcraft III: Reign Of Chaos Beta Key (defunct)
• 0x0E: 26-digit Warcraft III: Reign Of Chaos Key
• 0x0F: 26-digit Warcraft III: Reign Of Chaos Key
• 0x11: 26-digit Warcraft III: The Frozen Throne Beta Key (defunct)
• 0x12: 26-digit Warcraft III: The Frozen Throne Key
• 0x13: 26-digit Warcraft III: The Frozen Throne Retail key (NOTE: This product seems disabled? Has something to do with Chinese region)
• 0x15: 26-digit World of Warcraft: The Burning Crusade
• 0x16: 26-digit World of Warcraft: 14-day Trial
• 0x17: 26-digit Starcraft Key (upgrade when Starcraft was released as an online-download and the game CD was removed from requirements to run the application)
• 0x18: 26-digit Diablo II Key (released at the same time as the 26-digit keys for the same reasons)
• 0x19: 26-digit Diablo II: Lord of Destruction Key (see 0x17 and 0x18)
• 0x1A: 26-digit World of Warcraft: Wrath of the Lich King
• 0x1C: 26-digit Starcraft II: Wings of Liberty Key (only one key examined by this author, others may be in existence, and likely to change for the next two releases)
• 0x1E: 26-digit Diablo III Key

For each key type, the public and private value lengths differ, with the lengths usually being one DWORD, but with a 10-byte private value for 26-digit keys. Example code for encoding and decoding these keys is around, and the author of this document would like to thank Yegg for his work in creating more efficient Key coding in the linked examples: VB.NET|Battle.net CD-Key Encoding/Decoding.

Jailout2000 has also provided an example to REALbasic programmers for encoding and decoding 13-digit keys: REALbasic 13-digit Key Encoder/Decoder.

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