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'''The info on this page is an extract (and simplify) of talk page, conversations and forum posts, please digest the info and move it to this page.'''
'''The info on this page is an extract (and simplify) of talk page, conversations and forum posts, please digest the info and move it to this page'''


To merge on wiki:
See also [https://wiki.henkaku.xyz/vita/SceNpDrm].
* [http://www.emunewz.net/forum/showthread.php?tid=8134 PSP NPDRM explanation by Hykem]
* [http://wololo.net/talk/viewtopic.php?f=67&t=40656 How to find dev klicensee in NPDRM SELF - SPRX by '''Mysis''']


See also [https://wiki.henkaku.xyz/vita/SceNpDrm PS Vita NPDRM] and PSP NPDRM.
= PS3 NPDRM SELF - SPRX decryption steps =
 
Once the user is trying to start a [[SELF File Format and Decryption|SELF]], the [[VSH|vsh]] looks for the [[SELF_File_Format_and_Decryption#Program_Identification_Header|Program Identification Header]]. If the [[Program Type]] is NPDRM, then the [[SELF_File_Format_and_Decryption#Supplemental_Header_Table|NPDRM info]] is located. From this NPD header the vsh gets the [[NPDRM_Selfs#License_Type]].
 
If a Network Licensed content is to be loaded, the vsh loads the act.dat and the .rif associated to the content (will download .rif to vsh process memory).


= PS3 NPDRM SELF - SPRX decryption steps =
For Local License content too, the vsh locates a file with the same CONTENT ID than in NPDRM header, then the signatures are checked (last 0x28 bytes of both RIF and act.dat).


Once that the user is trying to start a [[SELF - SPRX]], the [[VSH]] looks for the [[SELF_-_SPRX#Program_Identification_Header|Program Identification Header]]. If the [[Program Type]] is NPDRM, then the [[SELF_-_SPRX#Supplemental_Header_Table|Supplemental Header Table NPDRM header]] is located. From this [[NPD]] header the [[VSH]] gets the [[#DRM Type]].
If a Free content (no license check: no need for .rif/act.dat) is detected then a [[Keys#klic_free_key|generic klicense]] will be use for further steps (go to LV2).


If a Network DRM content is to be loaded, the [[VSH]] loads the act.dat and the .rif associated to the content (it will download .rif to VSH process memory).
Using the RIF_KEY with the [[Keys#RIF.27s_act.dat_index_decryption_key|act.dat index decryption key]], it will obtain the actdatIndex, then the execution passes to [[LV2_Functions_and_Syscalls#LV2_Syscalls|LV2 Syscalls 471]].


For Local DRM content too, the [[VSH]] locates a file with the same CONTENT ID as in NPDRM header, then the signatures are checked (RIF offset 0x70 and act.dat offset 0x1010). Using the [[Keys#NPDRM_Keys|np_act_data_index_dec_key]], it will decrypt the actdatIndex stored in RIF.
This function has different parameters depending of the License Type:


If a Free DRM (DRM type 3) content is detected then there is no license check, so no need for .rif/act.dat, and a generic klicensee [[Keys#NPDRM_Keys|klic_ps3_free]] will be used for further steps.
<div style="width:600px; overflow:auto">
PAID: syscall471(npd.type, &npd.titleID, NULL, &actdat.keyTable[rif.actDatIndex], &rif.key, npd.license, &npd);
FREE: syscall471(npd.type, &npd.titleID, freeklicensee, NULL, NULL, npd.license, &npd);
</div>
:<small>*PAID can also include free games/apps too but require this licensing check</small>


Then the execution passes to [[LV2_Functions_and_Syscalls#LV2_Syscalls|LV2 Syscall no 471 sys_npdrm_regist_ekc]].
The lv2 keeps a memory table with contentID and the associated key:
<source lang="C">
*Licensed content: the encrypted klicensee is converted to the klicensee (by using a [[Keys#klicensee_constant|constant value on lv2]], [[IDPS|IDPS]] and the act.dat) and once transformed it is stored in memory table.
// is it titleID or content_id?
*Free content: copies the titleID and the generic klicensee to the table.
int sys_npdrm_regist_ekc(uint32_t type, char* titleID, void* klicensee, uint8_t* actdat, uint8_t* rif, int32_t licenseType, uint8_t* magicVersion);</source>
This function has different parameters depending on the [[#DRM Type]]:
* Local/Network DRM content: <source lang="C">sys_npdrm_regist_ekc(npd.type, &npd.titleID, NULL, &actdat.keyTable[rif.actDatIndex], &rif.key, npd.license, &npd);</source>
* Free DRM content: <source lang="C">sys_npdrm_regist_ekc(npd.type, &npd.titleID, klic_ps3_free, NULL, NULL, npd.license, &npd);</source>


The lv2 keeps a memory table with contentID and the associated klicensee:
From there, the lv1 hypervisor by loading [[Hypervisor_Reverse_Engineering#appldr|Appldr]], will transform (again) this key by using the [[Keys#klic_dec_key|klic_dec_key]] and finally remove the NPDRM layer to start the [[SELF - SPRX]] decryption.
* Local/Network DRM content: lv2 AES128 decrypts the encrypted klicensee from RIF by using [[Keys#NPDRM_Keys|NPDRM IDPS Seed]], [[IDPS]], act.dat and some other keys. Once transformed, klicensee is stored in a memory table.
* Free DRM content: lv2 copies the titleID and the generic klicensee (klic_ps3_free) to a memory table.


From there, the lv1 hypervisor, by loading [[Hypervisor_Reverse_Engineering#appldr|appldr]], will transform the key by using the [[Keys#ps3_klic_dec_key|ps3_klic_dec_key]] and finally remove the NPDRM layer of the SELF/SPRX to start the [[SELF - SPRX]] decryption.
See also:
*http://wololo.net/talk/viewtopic.php?f=67&t=40656 Tutorial: How to find dev klicensee by '''Mysis'''


= PS3 NPDRM EDAT decryption steps =
= PS3 NPDRM EDAT decryption steps =


See [[EDAT files]].
To document.
 
= DRM Type =


A temporary name was "License type".
= License Type =


{| class="wikitable sortable"
{| class="wikitable sortable"
Line 45: Line 44:
! Value !! Type !! Remarks
! Value !! Type !! Remarks
|-
|-
| 0 || Unknown (official name) || It does not require any license. Set in [[EDAT_files|SDATA files]].
| 0 || Debug || SDAT
|-
| 1 || Network || It requires network authentication every time the content is launched. See [http://en.wikipedia.org/wiki/PlayStation_Network_outage#Inability_to_use_PlayStation_3_content inability example].
|-
| 2 || Local || It requires first time activation online (paid content but also demo and free of charge content).
|-
|-
| 3 || Free || On PS3, it does not require any license file nor console activation (act.dat). PS3 disc bind contents use this DRM Type. On PSP, when a .rif is present for Free DRM Type, the RIF NP Account ID is replaced by a Magic Gate Memory Stick command result and the RIF encrypted account keyring index is replaced by the sha1 digest of this Magic Gate Memory Stick command result.
| 1 || Network License || It requires network authentication every time the content is launched. [http://en.wikipedia.org/wiki/PlayStation_Network_outage#Inability_to_use_PlayStation_3_content See inability example].
|-
|-
| 4 || PSP || This type exists according to PS3 make_package_npdrm.exe revision 1972. However, no .rif holding this DRM Type was ever seen.
| 2 || Local License || It requires first time activation online (paid content but also demo & free of charge content).
|-
|-
| 0xD || Free (PSP2/PSM) || Used for Free contents but with license (.rif) requirement, unlike DRM Type 3. Requires either pd0:license/rifname.rif (for Welcome Park) or /app/TITLEID/sce_sys/package/temp.bin (for .pkg installed from PS Store).
| 3 || Free || It does not require any license file nor console activation (act.dat).
|-
| 0x100 || Network (PSP/PSP2) || Seen in PSP and PS Vita OS. On PSP, extends the RIF ECDSA signed data with IDPS and Fuse ID. On PS Vita, forces OpenPSID comparison in RIF and thus RIF RSA signature verification.
|-
| 0x400 || GameCard (PSP2) || Requires a .rif stored in the gamecard filesystem and the gamecard  to be inserted for authentication.
|-
| 0x2000 || Unknown (PS3) || Seen in EP0001-NPEB00560_00-GRAW2PS3REMPKG01.rif.
|}
|}


NPDRM contents decryption requires a key, the key licensee or klicensee. Depending on the content's DRM Type, klicensee is got in different ways:
= Tools =
* DRM type Network: klicensee is generated using associated RIF downloaded on-load from PS Store + ?to detail?
* DRM type Local: klicensee is generated using associated RIF downloaded on-installation from PS Store + act.dat + console's IDPS
* DRM type Free: klicensee is the constant PS3 Free klicensee (see [[Keys#NPDRM_Keys|NPDRM keys]] and [[Keys#Appldr|appldr keys]])
* DRM type Free (PSP2/PSM): klicensee is derived from associated RIF stored in the NPDRM PKG file
* DRM type GameCard: klicensee is derived from associated RIF stored in the gamecard and gamecard authentication command


Free games/applications, e.g. demos and free additional contents can either use Free, Free (PSP2/PSM) or Local DRM Types.
*[http://pastie.org/private/yltlfwubsz8w5pyhmojyfg '''Rap2Rif''' source code by '''Flatz''' ]


= License Flags =
*[http://pastie.org/private/pmnmsnqg6zbfnk9xactbw#1 '''Rap2Rif Key''' souce code by '''Flatz''']


License Flags are guessed to be either 4 or 6 bytes long (leaving DRM Type either 2 or 4 bytes long).
*[[Dev_Tools#ReactPSN_.rap_-.3E_.rif_converter|Link download & usage]]
 
See [[RIF]].
 
* 1 by default
* 0x200 for preordered content that is not usable yet. Seen in EP1004-BLES01807_00-GTAVDLCATOMICBLI.rif, EP1004-NPEB01283_00-GTAVDIGITALDOWNL.rif and EP1004-NPEP00231_00-TGRANDTHEF000001.rif.
 
= Tools =


* Tools to convert RAP to klicensee: [[Dev_Tools#ReactPSN_.rap_to_.rif_converter|download links and usage]]
*[http://www.emunewz.net/forum/showthread.php?tid=8134 another reference]




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