SHA-1 Verification
With the new direction using CF cards, and the future of the downloadable platform,
(instead of using EPROM’s as the storage media) a new format was needed to secure and
verify game programs. The SHA-1 was chosen for this function.
SHA-1 (Secure Hash Algorithm) is used for computing a condensed
representation of a message or a data file. When a message of any length
is input, the SHA-1 produces a 160-bit output called a message digest. The
message digest can then be used in a signature algorithm or alone to verify
the signature for the message or data file.
Field Service will use SHA-1 as they have been using the Dataman or Kobatron schemes.
All serve the same purpose; just SHA-1 is more secure.
(A) GLI Verify Program
Technicians will be given a compact flash card
reader and software (GLI version) to perform
on-site verification of game software.
The goal is to use these resources to compare
program generated SHA-1 message digest (A),
to documented message digest such as par
sheet(C). In addition; the software has the
ability to document the test for future reference
(B).
(C) GEN7 Game Description Sheet “PAR”
Sheet
Installing the software
1. Unzip the CF Verify package to your computer.
(Note: Save to your desktop)
2. Double Left click on the “GLI Verify 2.0 Setup”
utility, to open the Install Wizard.
3. Follow on screen instructions to complete the
installation.
(Note: Place icon on your desktop for ease of use).
(B) Computer log file
GLI Compact Flash (CF) Card Verification Utility.
Note: Close all other applications before running this program.
Procedure
1) Place the CF card into the Compact Flash
Card Reader (USB or PCMIA Adapter).
2) Open the GLI Verify program.
3) When the program opens:
a) Check the “Directory” radio tab.
b) Check the “Linux Filesystem” radio tab.
c) Select the “Browse Directories” button.
 If hashing System Software or “Set
Chip” CF use Partition 2
 If hashing the Game Software use
Partition 3
d) Click the plus sign to expand
e) Select/highlight forward slash “/”
Example of Game Software Hash
f) Select “OK”
g) In the Options section, check “Append”
h) Use the open folder icon to select an output
file
 If no output file has been created then
create new file with a “.log” extension
for recording the information off the CF
card for later reference.
 Select “Yes” if prompted to create a
new file
4) Select “Calculate”