Python library for working with CPIX 2.1 (DASH-IF Content Protection Information Exchange) documents
For more details on CPIX see:
- https://dashif.org/guidelines/
- https://dashif.org/wp-content/uploads/2016/11/DASH-IF-CPIX-v2-0.pdf
- https://github.com/Dash-Industry-Forum/CPIX/tree/v2.1-communityreview
- Creation of CPIX documents
- Content keys
- Usage rules
- DRM systems
- Parsing of CPIX documents
- Validation against CPIX XSD
- Validation of document correctness (e.g. kid referenced by usage rule matches a content key)
- Encryption, decryption and signing are not supported.
Install using pip:
pip install cpix
Example scripts which can be used with Widevine and Playready test servers to
get or create keys and produce CPIX documents are available in example.
To create a simple CPIX document with a single key:
import cpix
full_cpix = cpix.CPIX(
content_keys=cpix.ContentKeyList(
cpix.ContentKey(
kid="0DC3EC4F-7683-548B-81E7-3C64E582E136",
cek="WADwG2qCqkq5TVml+U5PXw=="
)
),
drm_systems=cpix.DRMSystemList(
cpix.DRMSystem(
kid="0DC3EC4F-7683-548B-81E7-3C64E582E136",
system_id="EDEF8BA9-79D6-4ACE-A3C8-27DCD51D21ED",
pssh=("AAAAxnBzc2gBAAAA7e+LqXnWSs6jyCfc1R0h7QAAAAINw+xPdoNUi4HnPGT"
"lguE2FEe37S9mVyu9EwbOfPNhDQAAAIISEBRHt+0vZlcrvRMGznzzYQ0SEF"
"rGoR6qL17Vv2aMQByBNMoSEG7hNRbI51h7rp9+zT6Zom4SEPnsEqYaJl1Hj"
"4MzTjp40scSEA3D7E92g1SLgec8ZOWC4TYaDXdpZGV2aW5lX3Rlc3QiEXVu"
"aWZpZWQtc3RyZWFtaW5nSOPclZsG")
)
)
)This can then be printed as a formatted XML document:
print(str(full_cpix.pretty_print(xml_declaration=True), "utf-8'"))<?xml version='1.0' encoding='utf-8'?>
<CPIX xmlns:pskc="urn:ietf:params:xml:ns:keyprov:pskc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:dashif:org:cpix" xsi:schemaLocation="urn:dashif:org:cpix cpix.xsd">
<ContentKeyList>
<ContentKey kid="0dc3ec4f-7683-548b-81e7-3c64e582e136">
<Data>
<pskc:Secret>
<pskc:PlainValue>WADwG2qCqkq5TVml+U5PXw==</pskc:PlainValue>
</pskc:Secret>
</Data>
</ContentKey>
</ContentKeyList>
<DRMSystemList>
<DRMSystem kid="0dc3ec4f-7683-548b-81e7-3c64e582e136" systemId="edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
<PSSH>AAAAxnBzc2gBAAAA7e+LqXnWSs6jyCfc1R0h7QAAAAINw+xPdoNUi4HnPGTlguE2FEe37S9mVyu9EwbOfPNhDQAAAIISEBRHt+0vZlcrvRMGznzzYQ0SEFrGoR6qL17Vv2aMQByBNMoSEG7hNRbI51h7rp9+zT6Zom4SEPnsEqYaJl1Hj4MzTjp40scSEA3D7E92g1SLgec8ZOWC4TYaDXdpZGV2aW5lX3Rlc3QiEXVuaWZpZWQtc3RyZWFtaW5nSOPclZsG</PSSH>
</DRMSystem>
</DRMSystemList>
</CPIX>
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