buenas buscando un poco por otras pag. he encontrado un proyecto que intenta emular psx anulando las instrucciones NPDRM para ello han buscado en lineas de codigo del vsh, y se cree que hay que parchear una zona concreta de codigo:
Offset 0 1 2 3 4 5 6 7 8 9 A B C D E F
006790F0 43 6F 6E 74 65 6E 74 2D Content-
00679100 54 79 70 65 00 00 00 00 61 70 70 6C 69 63 61 74 Type applicat
00679110 69 6F 6E 2F 78 2D 69 2D 35 2D 64 72 6D 00 00 00 ion/x-i-5-drm
00679120 58 2D 49 2D 35 2D 44 52 4D 2D 56 65 72 73 69 6F X-I-5-DRM-Versio
00679130 6E 00 00 00 00 00 00 00 31 2E 30 00 00 00 00 00 n 1.0
00679140 61 70 70 6C 69 63 61 74 69 6F 6E 2F 78 2D 77 77 application/x-ww
00679150 77 2D 66 6F 72 6D 2D 75 72 6C 65 6E 63 6F 64 65 w-form-urlencode
00679160 64 00 00 00 00 00 00 00 55 73 65 72 2D 41 67 65 d User-Age
00679170 6E 74 00 00 00 00 00 00 4C 65 67 69 75 6D 20 70 nt Legium p
00679180 72 6F 20 42 72 69 74 61 6E 69 61 00 00 00 00 00 ro Britania
00679190 2F 00 00 00 00 00 00 00 65 78 64 61 74 61 00 00 / exdata
006791A0 2E 72 69 66 00 00 00 00 50 53 50 2F 4C 49 43 45 .rif PSP/LICE
006791B0 4E 53 45 00 00 00 00 00 50 53 50 00 00 00 00 00 NSE PSP
006791C0 25 73 2F 25 73 00 00 00 25 73 25 73 25 73 25 73 %s/%s %s%s%s%s
006791D0 25 73 25 73 00 00 00 00 25 73 25 73 25 73 25 73 %s%s %s%s%s%s
006791E0 00 00 00 00 00 00 00 00 25 30 32 78 00 00 00 00 %02x
006791F0 25 30 31 36 6C 6C 78 25 30 31 36 6C 6C 78 00 00 %016llx%016llx
00679200 2F 00 00 00 00 00 00 00 65 78 64 61 74 61 00 00 / exdata
00679210 61 63 74 2E 64 61 74 00 76 65 72 2E 74 78 74 00 act.dat ver.txt
00679220 2F 64 65 76 5F 66 6C 61 73 68 32 2F 64 72 6D 2F /dev_flash2/drm/
00679230 70 73 6E 2F 00 00 00 00 61 63 74 5F 00 00 00 00 psn/ act_
00679240 2E 64 61 74 00 00 00 00 2E 72 69 66 00 00 00 00 .dat .rif
00679250 68 74 74 70 73 3A 2F 2F 63 6F 6D 6D 65 72 63 65 https://commerce
00679260 2E 25 73 2E 61 63 2E 70 6C 61 79 73 74 61 74 69 .%s.ac.playstati
00679270 6F 6E 2E 6E 65 74 2F 63 61 70 2E 6D 00 00 00 00 on.net/cap.m
00679280 68 74 74 70 73 3A 2F 2F 63 6F 6D 6D 65 72 63 65 https://commerce
00679290 2E 25 73 2E 61 63 2E 70 6C 61 79 73 74 61 74 69 .%s.ac.playstati
006792A0 6F 6E 2E 6E 65 74 2F 63 64 70 2E 6D 00 00 00 00 on.net/cdp.m
006792B0 68 74 74 70 73 3A 2F 2F 63 6F 6D 6D 65 72 63 65 https://commerce
006792C0 2E 25 73 2E 61 63 2E 70 6C 61 79 73 74 61 74 69 .%s.ac.playstati
006792D0 6F 6E 2E 6E 65 74 2F 6B 64 70 2E 6D 00 00 00 00 on.net/kdp.m
006792E0 25 73 25 73 25 30 31 36 6C 6C 78 25 73 00 00 00 %s%s%016llx%s
006792F0 25 73 25 73 25 73 25 73 25 73 00 00 00 00 00 00 %s%s%s%s%s
00679300 61 63 74 5F 00 00 00 00 2E 64 61 74 00 00 00 00 act_ .dat
00679310 25 73 25 73 00 00 00 00 25 30 31 36 6C 6C 78 25 %s%s %016llx%
00679320 30 31 36 6C 6C 78 25 30 31 36 6C 6C 78 25 30 31 016llx%016llx%01
00679330 36 6C 6C 78 00 00 00 00 2F 64 65 76 5F 68 64 64 6llx /dev_hdd
00679340 30 00 00 00 00 00 00 00 25 73 25 73 25 73 00 00 0 %s%s%s
00679350 25 73 25 73 25 73 25 73 25 73 25 73 00 00 00 00 %s%s%s%s%s%s
00679360 2F 00 00 00 00 00 00 00 65 78 64 61 74 61 00 00 / exdata
00679370 2E 72 69 66 00 00 00 00 65 78 64 61 74 61 00 00 .rif exdata
00679380 2E 65 64 61 74 00 00 00 47 4F 4D 41 00 00 00 00 .edat GOMA
00679390 72 F9 90 78 8F 9C FF 74 57 25 F0 8E 4C 12 83 87 rùxœÿtW%ðŽL ƒ‡
006793A0 25 73 25 73 25 73 00 00 25 73 25 73 25 73 25 73 %s%s%s %s%s%s%s
006793B0 25 73 25 73 00 00 00 00 54 45 53 54 2D 50 52 4F %s%s TEST-PRO
006793C0 44 55 43 54 00 00 00 00 25 73 25 73 25 73 25 73 DUCT %s%s%s%s
006793D0 25 73 00 00 00 00 00 00 2E 73 65 6C 66 00 00 00 %s .self
006793E0 2E 73 70 72 78 00 00 00 2E 65 64 61 74 00 00 00 .sprx .edat
006793F0 67 61 6D 65 5F 70 6C 75 67 69 6E 00 00 00 00 00 game_plugin
00679400 2E 00 00 00 00 00 00 00 2E 2F 00 00 00 00 00 00 . ./
00679410 2E 2E 00 00 00 00 00 00 2E 2E 2F 00 00 00 00 00 .. ../
00679420 25 73 2F 25 73 00 00 00 DA 7D 4B 5E 49 9A 4F 53 %s/%s Ú}K^IšOS
00679430 B1 C1 A1 4A 74 84 44 3B 9B 51 5F EA CF 75 06 49 ±Á¡Jt„D;›Q_êÏu I
00679440 81 AA 60 4D 91 A5 4E 97 62 27 B0 0A 02 85 6F B0 ª`M‘¥N—b'° …o°
00679450 41 08 87 67 19 E0 A0 18 32 91 EE B9 6E 73 6A BF A ‡g à 2‘î¹nsj¿
00679460 81 F7 0E E9 16 1B 0D DE B0 26 76 1A FF 7B C8 5B ÷ é Þ°&v ÿ{È[
00679470 6B A5 29 76 EF DA 16 EF 3C 33 9F B2 97 1E 25 6B k¥)vïÚ ï<3Ÿ²— %k
00679480 54 45 53 54 2D 50 52 4F 44 55 43 54 00 00 00 00 TEST-PRODUCT
00679490 4B 85 8F 49 9E 8D D9 77 4A 35 EE FF AB 8F E2 3A K…IžÙwJ5îÿ«â:
006794A0 F0 9F 71 EA E8 E9 35 44 20 2E 62 79 74 65 20 30 ðŸqêèé5D .byte 0
006794B0 78 64 62 2C 30 78 66 38 2C 30 78 36 34 2C 30 78 xdb,0xf8,0x64,0x
006794C0 39 61 2C 30 78 33 33 2C 30 78 65 31 2C 30 78 36 9a,0x33,0xe1,0x6
006794D0 64 2C 30 78 32 37 20 0A 00 00 00 00 00 00 00 00 d,0x27
006794E0 4F 4B 44 45 53 55 59 4F 00 00 00 00 00 00 00 00 OKDESUYO
006794F0 50 53 50 4E 41 4E 53 55 00 00 00 00 00 00 00 00 PSPNANSU
"Esta parte del codigo parece ser decisiva a la hora de cargar el DRM y como ya es muy sabido en el caso de los juegos de psx en la PSN estos tienen un fichero ademas del EBOOT.PBP que es el ISO.BIN.EDAT este fichero es el ejecutable que usa la PS3 para proceder a cargar y montar la ISO (EBOOT.PBP), este ISO.BIN.EDAT no es mas que un ISO.BIN que fue comprimido y cifrado con el make_edata_npdrm siendo imposible descifrarlo con la misma herramienta debido a que cuenta con NPDRM, en esa porcion de codigo vemos las operaciones que realiza la PS3 para ejecutar un contenido NPDRM (Minis, PSX) vemos que en primer lugar chekea el directorio exdata en el HDD0 para luego buscar en dev_flash2/drm/psn los archivos .rif .dat que son la licencia que se descarga al hdd al comprar contenido en PSN, una vez hecho esto vemos las direcciones web donde hace los checks de licencia y por ende exigir acceso a PSN asi que cuando finaliza todo eso segun el codigo se dirige al fichero .EDAT y lo ejecuta (TEST-PRODUCT) hay se dirige en el caso de tratarse de un juego de PSX al Ps1_netemu."
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"Aqui viene lo interesante que esta misma porcion de codigo del VSH que se localiza despues de los checks DRM (Minis, PSX) es tambien encontrada en el ps1_netemu.self!, asi que para poder cargar nuestros backups de psx desde el disco duro tendremos que parchear esas zonas de los checks, a pesar de todo no he sido capaz de cargar ese codigo en mi version del IDA debido a ciertos problemas pero lo que es seguro es que todo indica que si modificamos y entendemos mejor esos checks en el VSH podremos ser capacez de reproducir nuestros backups de Ps1 inclusive probablemente minis de psp de forma gratuita."
info DH.org
user ing_pereira
se supone que el cobra-UsB que sale hoy, emula las NPDRM para saltarselas y ejecutar juegos de psx y minis de psp