I have a file which was encrypted in CENC I believe, and i'm trying to decrypt it for over few months now using mp4decrypt from the bento4 mp4decrypt tools but trust me I just don't know-how. This is the output of mp4info --verbose
C:UsersVDesktopBento4-SDK-1-6-0-637.x86_64-microsoft-win32in>mp4info --verbose C:UsersVectorDesktopAkachiAkachifmp4_480p_450000.mp4
File:
major brand: iso6
minor version: 1
compatible brand: mp42
compatible brand: dash
compatible brand: msdh
compatible brand: msix
compatible brand: iso6
compatible brand: avc1
compatible brand: isom
fast start: yes
Movie:
duration: 0 ms
time scale: 12800
fragments: yes
Found 1 Tracks
Track 1:
flags: 7 ENABLED IN-MOVIE IN-PREVIEW
id: 1
type: Video
duration: 0 ms
language: eng
media:
sample count: 0
timescale: 12800
duration: 0 (media timescale units)
duration: 0 (ms)
bitrate (computed): 449.854 Kbps
sample count with fragments: 175934
duration with fragments: 90078208
duration with fragments: 7037360 (ms)
display width: 854.000000
display height: 480.000000
Sample Description 0
[ENCRYPTED]
Coding: encv
Scheme Type: cenc
Scheme Version: 65536
Scheme URI:
Protection System Details:
[schi] size=8+32
[tenc] size=12+20
default_isProtected = 1
default_Per_Sample_IV_Size = 8
default_KID = [95 6f 1b f0 f9 35 48 3e b8 21 38 ae 52 63 3f 4c]
Bytes: 000000000000000100000000000000000000000000000000035601e000480000004800000000000000010a41564320436f64696e670000000000000000000000000000000000000000000018ffff00000031617663430142c01effe100196742c01ed900d83de6f011000003000100000300320f162e4801000568cb834b200000005073696e660000000c66726d6161766331000000147363686d0000000063656e630001000000000028736368690000002074656e630000000000000108956f1bf0f935483eb82138ae52633f4c
Coding: avc1 (H.264)
Width: 854
Height: 480
Depth: 24
AVC Profile: 66 (Baseline)
AVC Profile Compat: c0
AVC Level: 30
AVC NALU Length Size: 4
AVC SPS: [6742c01ed900d83de6f011000003000100000300320f162e48]
AVC PPS: [68cb834b20]
Codecs String: avc1.42C01E
C:UsersVDesktopBento4-SDK-1-6-0-637.x86_64-microsoft-win32in>
What I have access to:
(1) AUDIO AND VIDEO FILES .mp4 which contains the encrypted content for the Apk data files
(2) MANIFEST.mpd also from the apk data files
<!--
com.castlabs.drmtoday.encrypter dashencrypter 2.0.135
-->
<!--isoparser-1.1.21-->
<MPD profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" type="static" minBufferTime="PT20S" mediaPresentationDuration="PT1H57M17S">
<ProgramInformation moreInformationURL="www.castLabs.com"/>
<Period id="0" start="PT0S" duration="PT1H57M17S">
<AdaptationSet segmentAlignment="true" subsegmentAlignment="true" subsegmentStartsWithSAP="1" startWithSAP="1" bitstreamSwitching="true" mimeType="audio/mp4" lang="eng" minBandwidth="32600" maxBandwidth="135700">
<ContentProtection cenc:default_KID="956f1bf0-f935-483e-b821-38ae52633f4c" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
<ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95">
<cenc:pssh>
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
</cenc:pssh>
<mspr:pro>
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
</mspr:pro>
</ContentProtection>
<ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
<cenc:pssh>
AAAAVHBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADQIARIQlW8b8Pk1SD64ITiuUmM/TBoIY2FzdGxhYnMiEJVvG/D5NUg+uCE4rlJjP0wqAlNE
</cenc:pssh>
</ContentProtection>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation codecs="mp4a.40.2" audioSamplingRate="48000" id="aac_64000.mp4" bandwidth="65200">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>aac_64000.mp4</BaseURL>
<SegmentBase timescale="48000" indexRangeExact="true" indexRange="1643-7302">
<Initialization range="0-1642"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="1" segmentAlignment="true" subsegmentAlignment="true" subsegmentStartsWithSAP="1" startWithSAP="1" bitstreamSwitching="true" mimeType="video/mp4" par="16:9" frameRate="25000/1000" sar="1:1" minWidth="256" maxWidth="1280" minHeight="144" maxHeight="720" minBandwidth="60400" maxBandwidth="1111000">
<ContentProtection cenc:default_KID="956f1bf0-f935-483e-b821-38ae52633f4c" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
<ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95">
<cenc:pssh>
AAADNHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAAxQUAwAAAQABAAoDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4AcwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAANwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIAPgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4APABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBJAEQAPgA4AEIAdAB2AGwAVABYADUAUABrAGkANABJAFQAaQB1AFUAbQBNAC8AVABBAD0APQA8AC8ASwBJAEQAPgA8AEwAQQBfAFUAUgBMAD4AaAB0AHQAcABzADoALwAvAGwAaQBjAC4AZAByAG0AdABvAGQAYQB5AC4AYwBvAG0ALwBsAGkAYwBlAG4AcwBlAC0AcAByAG8AeAB5AC0AaABlAGEAZABlAHIAYQB1AHQAaAAvAGQAcgBtAHQAbwBkAGEAeQAvAFIAaQBnAGgAdABzAE0AYQBuAGEAZwBlAHIALgBhAHMAbQB4ADwALwBMAEEAXwBVAFIATAA+ADwATABVAEkAXwBVAFIATAA+AGgAdAB0AHAAOgAvAC8AdwB3AHcALgBpAHIAbwBrAG8AdAB2AC4AYwBvAG0APAAvAEwAVQBJAF8AVQBSAEwAPgA8AEMASABFAEMASwBTAFUATQA+AHQAdAAwAFgAeABiAFYAcABMAGIAQQA9ADwALwBDAEgARQBDAEsAUwBVAE0APgA8AC8ARABBAFQAQQA+ADwALwBXAFIATQBIAEUAQQBEAEUAUgA+AA==
</cenc:pssh>
<mspr:pro>
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
</mspr:pro>
</ContentProtection>
<ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
<cenc:pssh>
AAAAVHBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADQIARIQlW8b8Pk1SD64ITiuUmM/TBoIY2FzdGxhYnMiEJVvG/D5NUg+uCE4rlJjP0wqAlNE
</cenc:pssh>
</ContentProtection>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation codecs="avc1.42c01e" width="854" height="480" id="fmp4_480p_450000.mp4" bandwidth="454400">
<BaseURL>fmp4_480p_450000.mp4</BaseURL>
<SegmentBase timescale="12800" indexRangeExact="true" indexRange="1756-22895">
<Initialization range="0-1755"/>
</SegmentBase>
</Representation>
</AdaptationSet>
</Period>
</MPD>
(3) lICENCE REQUEST AND RESPONSE FROM WEB BROWSER DOM
https://lic.drmtoday.com/license-proxy-widevine/cenc/?sid=c5b086ae-cd76-46e9-a1e0-bab92a678388
{
"status": "OK",
"status_message": "",
"license": "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",
"license_metadata": {
"content_id": "Cko
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