Licenses can also be obtained out-of-band (without contacting
a Adobe Access License Server) by storing the voucher (license)
on disk and in memory using the
storeVoucher
method.
To play encrypted videos in Flash Player and AIR, the respective
runtime needs to obtain the DRM voucher for that video. The DRM
voucher contains the video’s decryption key and is generated by
the Adobe Access License Server that the customer has deployed.
The Flash Player/AIR runtime generally obtains this voucher by
sending a voucher request to the Adobe Access License Server indicated
in the video’s DRM metadata (
DRMContentData
class).
The Flash/AIR application can trigger this license request by calling
the
DRMManager.loadVoucher()
method. Or, the Flash
Player/AIR runtime will automatically request a license at the start
of the encrypted video playback if there is no license for the content
on disk or in memory. In either case, the Flash/AIR application’s
performance gets impacted by communicating with the Adobe Access
License Server.
DRMManager.storeVoucher()
allows the Flash/AIR
application to send DRM vouchers that it has obtained out-of-band
to the Flash Player/AIR runtime. The runtime can then skip the license
request process and use the forwarded vouchers for playing encrypted
videos. The DRM voucher still needs to be generated by the Adobe
Access License Server before it can be obtained out-of-band. However,
you have the option of hosting the vouchers on any HTTP server, instead
of a public-facing Adobe Access license server.
DRMManager.storeVoucher()
is also used to support
DRM voucher sharing between multiple devices. In Adobe Access 3.0,
this feature is referred to as “Domain Support”. If your deployment
supports this use case, you can register multiple machines to a
device group using the
DRMManager.addToDeviceGroup()
method.
If there is a machine with a valid domain-bound voucher for a given
content, the AIR application can then extract the serialized DRM
vouchers using the
DRMVoucher.toByteArray()
method
and on your other machines you can import the vouchers using the
DRMManager.storeVoucher()
method.
