C>S 0x3C SID_CHECKDATAFILE2

Transport Layer: Transmission Control Protocol (TCP)
Application Layer: Battle.net v1 TCP Messages (SID)
Message Id: 0x3C
Message Name: SID_CHECKDATAFILE2
Direction: Client to Server
Used By:
Starcraft OriginalStarcraft BroodwarStarcraft SharewareStarcraft JapaneseWarcraft II BNE
Message Format:
(does not include protocol header) 
(UINT32) File size in bytes
(UINT32) File hash [5]
(STRING) Filename

Remarks

Verifies that a file is authentic, by producing a hash of that file and sending it to the server for comparison to the original.

The hash is a standard SHA1 hash.

🔖starcraftstarcraft-broodwarstarcraft-japanwarcraft-ii
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