VeriFone DUET Vx810, Справочное руководство

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P
ERFORMING
D
OWNLOADS
File Authentication Requirements
V X 810 R
EFERENCE
G
UIDE
107
Download an
Operating System
Update Provided by
VeriFone
Because the operating system software for the V
x
810 is developed and controlled
by VeriFone for its customers, VeriFone provides the necessary certificates and
signature files to ensure the authenticity and integrity of the operating system
update as part of the download package.
The file authentication procedure for OS downloads is much the same as that for
application downloads, with the following exceptions:
•
VeriFone provides all files required for the OS download, including:
•
The operating system files (such as Q.out, 1.out, and 2.out).
•
An encrypted list of the new files, called VFI.PED.
•
A signature file generated by the VeriFone CA under the authority of a
higher-level OS partition sponsor certificate, called VFI.crt. The file
authentication logic on the receiving device uses this signature file to
confirm the origin and authenticity of the encrypted list of files, VFI.PED.
•
The entire OS package must download into Group 1 SRAM. If you select a
target group other than Group 1, the operation fails.
•
Before initiating an OS download, either full or partial, ensure that enough
memory space is available in Group 1 SRAM to temporarily store the OS files
and that any application files can also be stored in Group 1.
•
If a full OS download was selected in system mode, the device automatically
restarts and the new OS is processed and replaces the existing OS. In this
download operation, all application files stored in Group 1 are automatically
erased.
•
If a partial OS download was selected in the system mode, the operating
system returns control to system mode after the download completes. To
process the new OS, you must manually restart the device by selecting the
appropriate system mode menu option. In a partial OS download operation,
application files stored in Group 1 are not erased.
•
When the OS download is initiated, the OS file authentication progress is
displayed on the screen as new certificates are authenticated and added to
the device’s certificate tree, and as signature files for corresponding OS files
are detected and authenticated.
NOTE
Operating system files can only be transferred to a V
x
810 device using a PC-to-
device direct download procedure. OS files cannot be downloaded onto a V
x
810
device in a back-to-back operation.