SceNpDrm: Difference between revisions

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Initialization steps (per-content):
Initialization steps (per-content):


7. Get 0x98 / 0x200 bytes of RIF data from the content's .rif file and select one of the 5 scenarios for decrypting RIF Key into klicensee based on License flags (need to figure out). In most cases only the first 0x70 bytes are needed for klicensee derivation because at 0x70 is the ECDSA signature which is not used for derivation, and after 0x98 is data only used for some PS Vita contents (maybe only PS Vita cartridges require a 0x200-byte RIF).
7. Get 0x98 / 0x200 bytes of RIF from the content's .rif file and select one of the 5 scenarios for decrypting RIF Key into klicensee based on License flags (need to figure out). In most cases only the first 0x70 bytes are needed for klicensee derivation because at 0x70 is the ECDSA signature which is not used for derivation, and after 0x98 is data only used for some PS Vita contents (maybe only PS Vita cartridges require a 0x200-byte RIF).


=== Scenario 1 - maybe DRM Free ===
=== Scenario 1 - maybe DRM Free ===
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Take static keys 3, 4.
Take static keys 3, 4.


Take first 0x70 bytes of RIF data.
Take first 0x70 bytes of RIF.


Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
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Take primary keys 1, 2.
Take primary keys 1, 2.


Take first 0x70 bytes of RIF data.
Take first 0x70 bytes of RIF.


Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
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Take cmd56 handshake keys with [[SceSblGcAuthMgr#get_5018_data|get_5018_data]].
Take cmd56 handshake keys with [[SceSblGcAuthMgr#get_5018_data|get_5018_data]].


Take first 0x70 bytes of RIF data.
Take first 0x70 bytes of RIF.


Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 2 and obtain klicensee.
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Take cmd56 handshake keys with [[SceSblGcAuthMgr#get_5018_data|get_5018_data]].
Take cmd56 handshake keys with [[SceSblGcAuthMgr#get_5018_data|get_5018_data]].


Take first 0x70 bytes of RIF data.
Take first 0x70 bytes of RIF.


Erase RIF Key 1 from RIF data.
Erase RIF Key 1 from RIF.


Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 1 and obtain klicensee.
Use [[SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver]] to decrypt RIF key 1 and obtain klicensee.
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Take RIF Key 1.
Take RIF Key 1.


Decrypt Primary Table Key index from RIF data with static key 2 using AES (need to figure out which AES exactly).
Decrypt Primary Table Key index from RIF with static key 2 using AES (need to figure out which AES exactly).


Take primary key using decrypted index.
Take primary key using decrypted index.
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typedef struct {
typedef struct {
uint64_t mode; // 0: bounded, 1: fixed
uint64_t mode; // 0: bounded, 1: fixed
uint64_t aid;
uint64_t account_id;
} SceNpDrmRifName;
} SceNpDrmRifName;


int getRifName(char *name, int length, uint64_t aid, uint64_t mode) {
int getRifName(char *name, int length, uint64_t account_id, uint64_t mode) {
SceNpDrmRifName rif_name;
SceNpDrmRifName rif_name;
rif_name.mode = mode;
rif_name.mode = mode;
rif_name.aid = aid;
rif_name.account_id= account_id;
aes_encrypt(&rif_name, sizeof(SceNpDrmRifName), rif_name_keys);
aes_encrypt(&rif_name, sizeof(SceNpDrmRifName), rif_name_keys);
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|}
|}


<source lang="C">int _sceNpDrmGetRifName(char *name, uint64_t aid);</source>
<source lang="C">int _sceNpDrmGetRifName(char *rif_name, SceUInt64 account_id);</source>


=== _sceNpDrmGetRifNameForInstall ===
=== _sceNpDrmGetRifNameForInstall ===
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<source lang="C">
<source lang="C">
//name is of size 0x30
// rif_name is of size 0x30
//rif_data is of size 0x200
// rif is of size 0x200
int _sceNpDrmGetRifNameForInstall(char *name, void *rif_data, int num);
// num: must be 1
int _sceNpDrmGetRifNameForInstall(char *rif_name, void *rif, int num);
</source>
</source>


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<source lang="C">
<source lang="C">
typedef struct rif_info { //size is 0x70
typedef struct rif_info { // size is 0x70
   char content_id[0x30];
   char content_id[0x30];
   char version_number[4];
   char version_number[4];
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} rif_info;
} rif_info;


typedef struct _sceNpDrmGetRifInfo_opt { //size is 0x28
typedef struct _sceNpDrmGetRifInfo_opt { // size is 0x28
   void* content_id;
   void* content_id;
   void* account_id;
   void* account_id;
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} _sceNpDrmGetRifInfo_opt;
} _sceNpDrmGetRifInfo_opt;


// rif data is of size 0x200
// rif is of size 0x200
int _sceNpDrmGetRifInfo(void* rif_data, int rif_size, int num, _sceNpDrmGetRifInfo_opt* opt);
int _sceNpDrmGetRifInfo(void* rif, SceSize rif_size, SceUInt32 num, _sceNpDrmGetRifInfo_opt* pOpt);
</source>
</source>


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|}
|}


<source lang="C">int _sceNpDrmGetFixedRifName(char *name, uint64_t aid);</source>
<source lang="C">int _sceNpDrmGetFixedRifName(char *name, uint64_t account_id);</source>


=== _sceNpDrmCheckActData ===
=== _sceNpDrmCheckActData ===
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<source lang="C">
<source lang="C">
// rif data is of size 0x200
// rif is of size 0x200
int _sceNpDrmPresetRifProvisionalFlag(void* rif_data);
int _sceNpDrmPresetRifProvisionalFlag(void* rif);
</source>
</source>


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<source lang="C">  
<source lang="C">  
// content_id size is 0x30
// content_id is of size 0x30
int sceNpDrmGetRifInfoForDriver(const void *license, SceSize license_size, int check_sign, char *content_id, SceUInt64 *pAccountId, int *pLicenseVersion, int *pLicenseFlags, int *flags, int *sku_flags, SceInt64 *lic_start_time, SceInt64 *lic_exp_time, SceUInt64 *flags2);
int sceNpDrmGetRifInfoForDriver(const void *license, SceSize license_size, int check_sign, char *content_id, SceUInt64 *pAccountId, int *pLicenseVersion, int *pLicenseFlags, int *flags, int *sku_flags, SceInt64 *lic_start_time, SceInt64 *lic_exp_time, SceUInt64 *flags2);
</source>
</source>
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<source lang="C">
<source lang="C">
// name is of size 0x30
// name is of size 0x30
int sceNpDrmGetFixedRifNameForDriver(char *name, SceUInt64 aid);
int sceNpDrmGetFixedRifNameForDriver(char *name, SceUInt64 account_id);
</source>
</source>


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<source lang="C">
<source lang="C">
// name is of size 0x30
// name is of size 0x30
int sceNpDrmGetRifNameForDriver(char *name, SceUInt64 aid);
int sceNpDrmGetRifNameForDriver(char *name, SceUInt64 account_id);
</source>
</source>


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|}
|}


get </code>tm0:/npdrm/act.dat</code> info
Gets information about NPDRM per-console activation data at tm0:/npdrm/act.dat.


<source lang="C">
<source lang="C">
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<source lang="C">
<source lang="C">
// dst size is 0x200
// dst is of size 0x200
int sceNpDrmEbootSigGenMultiDiscForDriver(const char *path, const void *some_sig, void *dst, SceUInt32 systemSwVersion);
int sceNpDrmEbootSigGenMultiDiscForDriver(const char *path, const void *some_sig, void *dst, SceUInt32 systemSwVersion);
</source>
</source>
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<source lang="C">
<source lang="C">
// dst size is 0x200
// dst is of size 0x200
int sceNpDrmEbootSigGenPs1ForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);
int sceNpDrmEbootSigGenPs1ForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);
</source>
</source>
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<source lang="C">
<source lang="C">
// pLegacyDocKey size is 0x10 bytes
// pLegacyDocKey is of size 0x10 bytes
int sceNpDrmGetLegacyDocKeyForDriver(void *pRif, void *pDocEdat, SceSize docEdatSize, void *pLegacyDocKey);
int sceNpDrmGetLegacyDocKeyForDriver(void *pRif, void *pDocEdat, SceSize docEdatSize, void *pLegacyDocKey);
</source>
</source>
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<source lang="C">
<source lang="C">
// dst size is 0x200
// dst is of size 0x200
int sceNpDrmEbootSigGenPspForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);
int sceNpDrmEbootSigGenPspForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);
</source>
</source>
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<source lang="C">
<source lang="C">
// dst size is 0x200
// dst is of size 0x200
int sceNpDrmEbootSigConvertForDriver(const char *path, const void *some_sig, void *dst);
int sceNpDrmEbootSigConvertForDriver(const char *path, const void *some_sig, void *dst);
</source>
</source>
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<source lang="C">
<source lang="C">
// dst size is 0x100
// dst is of size 0x100
int sceNpDrmPspEbootSigGenForDriver(const char *path, const void *hash_sha256, void *dst);
int sceNpDrmPspEbootSigGenForDriver(const char *path, const void *hash_sha256, void *dst);
</source>
</source>
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|}
|}


<source lang="C">int sceNpDrmGetRifPspKeyForDriver(const void *license, void *klicensee, int *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);</source>
<source lang="C">int sceNpDrmGetRifPspKeyForDriver(const void *license, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);</source>


=== sceNpDrmGetRifVitaKeyForDriver ===
=== sceNpDrmGetRifVitaKeyForDriver ===
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It uses [[#sceNpDrmGetRifInfoForDriver]] to get required fields.
It uses [[#sceNpDrmGetRifInfoForDriver]] to get required fields.


<source lang="C">int sceNpDrmGetRifVitaKeyForDriver(const void *license, void *klicensee, int *flags, int *sku_flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);</source>
<source lang="C">int sceNpDrmGetRifVitaKeyForDriver(const void *license, void *klicensee, SceUInt32 *flags, SceUInt32 *sku_flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);</source>


=== sceNpDrmWriteActDataForDriver ===
=== sceNpDrmWriteActDataForDriver ===
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<source lang="C">
<source lang="C">
// act_data is of size 0x1040
// npdrm_act_data is of size 0x1040
int sceNpDrmWriteActDataForDriver(void *act_data, const char *aes_dec_key);
int sceNpDrmWriteActDataForDriver(void *npdrm_act_data, const char *aes_dec_key);
</source>
</source>


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<source lang="C">
<source lang="C">
// rif_data max size is 0x200
// rif max size is 0x200
int sceNpDrmVerifyRifForDriver(void *rif_data, SceSize rif_size);
int sceNpDrmVerifyRifForDriver(void *rif, SceSize rif_size);
</source>
</source>


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<source lang="C">
<source lang="C">
// rif data size is unknown but at least 0xF8
// rif size is unknown but at least 0xF8
int sceNpDrmVerifyRifFullForDriver(void *rif_data);
int sceNpDrmVerifyRifFullForDriver(void *rif);
</source>
</source>


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<source lang="C">
<source lang="C">
//opt is of size 0x10
// opt is of size 0x10
int _sceNpDrmPackageInstallStarted(int unk0, int unk1, int unk2, void* opt);
int _sceNpDrmPackageInstallStarted(int unk0, int unk1, int unk2, void* opt);
</source>
</source>
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<source lang="C">
<source lang="C">
typedef struct _sceNpDrmPackageDecrypt { //size is 0x10
typedef struct _sceNpDrmPackageDecrypt { // size is 0x10
   SceOff offset; //The offset in the encrypted data
   SceOff offset; //The offset in the encrypted data
   unsigned int identifier;
   unsigned int identifier;
Line 805: Line 806:


<source lang="C">
<source lang="C">
//opt is of size 0x10
// opt is of size 0x10
int _sceNpDrmPackageUninstallStarted(int unk0, int unk1, int unk2, void* opt);
int _sceNpDrmPackageUninstallStarted(int unk0, int unk1, int unk2, void* opt);
</source>
</source>
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<source lang="C">
<source lang="C">
//opt is of size 0x8
// opt is of size 0x8
int unk_640C1724(int unk0, int unk1, int unk2, void *opt);
int unk_640C1724(int unk0, int unk1, int unk2, void *opt);
</source>
</source>
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<source lang="C">
<source lang="C">
//opt is of size 0x10
// opt is of size 0x10
int unk_97BB85BD(int unk0, int unk1, int unk2, void *opt)
int unk_97BB85BD(int unk0, int unk1, int unk2, void *opt)
</source>
</source>
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== ScePsmDrm ==
== ScePsmDrm ==


=== get_rif_name ===
=== scePsmDrmGetRifName ===
{| class="wikitable"
{| class="wikitable"
|-
|-
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| 3.60 || 0x0D6470DA
| 3.60 || 0x0D6470DA
|}
|}
This is a guessed name.


<source lang="C">
<source lang="C">
// some data is of size 0x400 and contains rif data
// rif is of size 0x400
int get_rif_name(char *rif_name, void *some_data);
int scePsmDrmGetRifName(char *rif_name, void *rif);
</source>
</source>


=== _get_info ===
=== scePsmDrmGetDebugRifName ===
{| class="wikitable"
|-
! Version !! NID
|-
| 3.60 || 0x3E881391
|}
 
This is a guessed name.
 
<source lang="C">int scePsmDrmGetDebugRifName(char *rif_name);</source>
 
=== scePsmDrmGetRifInfo ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 915: Line 930:


<source lang="C">
<source lang="C">
typedef struct get_info_opt { //size is 0x10
typedef struct ScePsmDrmGetRifInfoOpt { //size is 0x10
  void* out2;
  SceUInt64 lic_start_time;
  void* out3;
  SceUInt64 lic_exp_time;
uint32_t unk_8;
} ScePsmDrmGetRifInfoOpt;
uint32_t unk_C;
} get_info_opt;


int _get_info(void *some_data, void *out0, void *out1, get_info_opt *opt);
int scePsmDrmGetRifInfo(void *rif, char *content_id, void *account_id, ScePsmDrmGetRifInfoOpt *pOpt);
</source>
</source>


=== scePsmDrmGetRifKey ===
=== scePsmDrmGetPsmRifKey ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 934: Line 947:


<source lang="C">
<source lang="C">
/**
/**
* rif_data size 0x400
* rif is of size 0x400
* klicensee size 0x200
* klicensee is of size 0x200
**/
**/
int scePsmDrmGetRifKey(SceNpDrmLicense *rif_data, uint8_t *klicensee, uint32_t *flags, uint64_t *start_time, uint64_t *expiration_time);
int scePsmDrmGetPsmRifKey(void *rif, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);
 
</source>
</source>


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</source>
</source>


=== unk_3E881391 ===
=== ScePsmDrm_A89653B3 ===
{| class="wikitable"
{| class="wikitable"
|-
|-
! Version !! NID
! Version !! NID
|-
|-
| 3.60 || 0x3E881391
| 3.60 || 0xA89653B3
|}
|}


<source lang="C">int unk_3E881391(int unk0);</source>
Calls [[#ScePsmDrmForDriver_B09003A7]].


=== unk_A89653B3 ===
<source lang="C">
{| class="wikitable"
typedef struct ScePsmDrm_A89653B3_Opt { // size is 0x10
|-
SceUInt64 info4;
! Version !! NID
SceUInt64 info5;
|-
} ScePsmDrm_A89653B3_Opt;
| 3.60 || 0xA89653B3
|}


<source lang="C">
int ScePsmDrm_A89653B3(SceUInt32 *pInfo1, SceUInt32 *pInfo2, SceUInt64 *pInfo3, ScePsmDrm_A89653B3_Opt *pOpt);
//opt is of size 0x10
int unk_A89653B3(int unk0, int unk1, int unk2, void *opt);
</source>
</source>


Line 992: Line 999:


<source lang="C">
<source lang="C">
//license_buf is of size 0x400
// rif is of size 0x400
//content_id is of size 0x30
// content_id is of size 0x30
//account_id is of size 0x8
int scePsmDrmGetRifInfoForDriver(void *rif, char *content_id, SceUInt64 *account_id, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);
//start_time is of size 0x8
//expiration_time is of size 0x8
int scePsmDrmGetRifInfoForDriver(ScePsmDrmLicense *license_buf, char *content_id, uint64_t *account_id, uint64_t *start_time, uint64_t *expiration_time);
</source>
</source>


=== get_info_2_for_driver ===
=== scePsmDrmGetRifPsmKeyForDriver ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 1,011: Line 1,015:


<source lang="C">
<source lang="C">
//data is of size 0x400
// rif is of size 0x400
//out0 is of size 0x200
// klicensee is of size 0x200
//out1 is of size 0x4
int scePsmDrmGetRifPsmKeyForDriver(void *rif, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);
//out2 is of size 0x8
//out3 is of size 0x8
int get_info_2_for_driver(void *data, void *out0, void *out1, void *out2, int out3);
</source>
</source>


=== set_psm_act_data ===
=== scePsmDrmWriteActDataForDriver ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 1,037: Line 1,038:
<source lang="C">
<source lang="C">
//data is of size 0x400
//data is of size 0x400
int set_psm_act_data(void *psm_act_data, const char *aes_dec_key);
int scePsmDrmWriteActDataForDriver(void *psm_act_data, const char *aes_dec_key);
</source>
</source>


Line 1,055: Line 1,056:
</source>
</source>


=== unk_791198CE ===
=== ScePsmDrmForDriver_791198CE ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 1,063: Line 1,064:
|}
|}


<source lang="C">int unk_791198CE();</source>
<source lang="C">int ScePsmDrmForDriver_791198CE();</source>


=== unk_B09003A7 ===
=== ScePsmDrmForDriver_B09003A7 ===
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 1,073: Line 1,074:
|}
|}


<source lang="C">int unk_B09003A7(int unk0, int unk1, int unk2, int unk3, int arg_0);</source>
Gets information about PSM RIF or ACT.DAT.
 
<source lang="C">int ScePsmDrmForDriver_B09003A7(SceUInt32 *pInfo1, SceUInt32 *pInfo2, SceUInt64 *pInfo3, SceUInt64 *pInfo4, SceUInt64 *pInfo5);</source>


== Package integrity checks ==
== Package integrity checks ==

Revision as of 13:48, 22 June 2023

Module

Version World Privilege
0.990.000-3.740.011 Non-secure Kernel

Libraries

Known NIDs

Version Name World Visibility NID
1.000.071-3.740.011 SceNpDrm Non-secure User 0xF2799B1B
0.990.000-3.740.011 SceNpDrmForDriver Non-secure Kernel 0xD84DC44A
1.000.071-3.740.011 SceNpDrmPackage Non-secure User 0x88514DB2
1.800.071-3.570.011 ScePsmDrm Non-secure User 0x3F2B0888
1.800.071-3.740.011 ScePsmDrmForDriver Non-secure Kernel 0x9F4924F2

Data segment layout

Address Size Description
0x0000 0x4 SceNpDrm mutex SceUID
0x0004 0x4 ScePsmDrm mutex SceUID
0x0008 0x8 unknown
0x0010 0xC0 Static keys decrypted with sceSblAuthMgrGetEKcForDriver key 0.

First 0x10 bytes are reencrypted with ConsoleId.

First 0x10 bytes are aes_key used to decrypt 0x800 bytes of Primary Key Table from act.dat.

Second 0x10 bytes are aes_key used to decrypt Primary Key Table index from rif.

0x00D0 0xCF8 unknown
0x0DC8 0x4 Game Exist flag
0x0DCC 0x4 Is DEX flag or Is Tool flag
0x0DD0 0x30 unknown
0x0E00 0x1040 tm0:/npdrm/act.dat data
0x1E40 0x400 tm0:/psmdrm/act.dat data
0x2240 0x10 OpenPsId

This data is compared against OpenPsId in act.dat and under some conditions in .rif at offset 0xC0.

0x2250 0x4 act data Is Valid flag
0x2254 0x4 unknown
0x2258 0x8 /CONFIG/NP/account_id registry key
0x2260 0x4 Loose Account Bind flag
0x2264 0x4 /CONFIG/NP/debug_upgradable registry key
0x2268 0x20 sha256 digest of get_act_data
0x2288 0x20 hmac-sha256 digest of get_act_data
0x22A8 0x8 unknown
0x22B0 0x8 account_id
0x22B8 0x8 PSM activation start date
0x22C0 0x8 PSM activation end date
0x22C8 0x20 some key decrypted with 0x2288

Obtaining klicensee

Initialization steps (common):

1. Get the hardcoded encrypted EKc (0xC0 bytes). (on FW 3.60, 0xC0 bytes from SceNpDrm code segment at offset 0x111D0)

2. Decrypt the hardcoded encrypted EKc using sceSblAuthMgrGetEKcForDriver with key revision 0 (?or 1 or 2?).

Initialization steps (per-console):

3. Get ConsoleId (0x10 bytes) using sceSblAimgrGetConsoleIdForDriver.

4. Decrypt using AES128ECB first 0x10 bytes of EKc with ConsoleId as key.

5. Read 0x800 bytes of the encrypted Primary Key Table from act.dat file.

6. Decrypt 0x800 bytes of Primary Key Table with reencrypted static key using AES (need to figure out which AES exactly).

Initialization steps (per-content):

7. Get 0x98 / 0x200 bytes of RIF from the content's .rif file and select one of the 5 scenarios for decrypting RIF Key into klicensee based on License flags (need to figure out). In most cases only the first 0x70 bytes are needed for klicensee derivation because at 0x70 is the ECDSA signature which is not used for derivation, and after 0x98 is data only used for some PS Vita contents (maybe only PS Vita cartridges require a 0x200-byte RIF).

Scenario 1 - maybe DRM Free

Take RIF Key 2.

Take static keys 3, 4.

Take first 0x70 bytes of RIF.

Use SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver to decrypt RIF key 2 and obtain klicensee.

Scenario 2

Take RIF Key 2.

Take primary keys 1, 2.

Take first 0x70 bytes of RIF.

Use SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver to decrypt RIF key 2 and obtain klicensee.

Scenario 3 - Game Cartridge

Take RIF Key 2.

Take cmd56 handshake keys with get_5018_data.

Take first 0x70 bytes of RIF.

Use SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver to decrypt RIF key 2 and obtain klicensee.

Scenario 4 - Game Cartridge

Take RIF Key 1.

Take cmd56 handshake keys with get_5018_data.

Take first 0x70 bytes of RIF.

Erase RIF Key 1 from RIF.

Use SceSblAuthMgr#sceSblAuthMgrDecBindDataForDriver to decrypt RIF key 1 and obtain klicensee.

Scenario 5

Take RIF Key 1.

Decrypt Primary Table Key index from RIF with static key 2 using AES (need to figure out which AES exactly).

Take primary key using decrypted index.

Decrypt RIF key 1 with obtained primary key using AES (need to figure out which AES exactly).

Get rif name algorithm

uint8_t rif_name_keys[0x10] = {
	0x19, 0xDD, 0x4F, 0xB9, 0x89, 0x48, 0x2B, 0xD4,
	0xCB, 0x9E, 0xC9, 0xC7, 0x9A, 0x2E, 0xFB, 0xD0
};

int aes_encrypt(const void *buf, int size, uint8_t *keys) {
	AES_ctx ctx;
	AES_set_key(&ctx, rif_name_keys, 0x80);

	int i;
	for (i = 0; i < size; i += 0x10) {
		AES_encrypt(&ctx, buf+i, buf+i);
	}
}

typedef struct {
	uint64_t mode; // 0: bounded, 1: fixed
	uint64_t account_id;
} SceNpDrmRifName;

int getRifName(char *name, int length, uint64_t account_id, uint64_t mode) {
	SceNpDrmRifName rif_name;
	rif_name.mode = mode;
	rif_name.account_id= account_id;
	aes_encrypt(&rif_name, sizeof(SceNpDrmRifName), rif_name_keys);
	
	snprintf(name, length, "%016llx%016llx.rif", __builtin_bswap64(((uint64_t *)&rif_name)[0]), __builtin_bswap64(((uint64_t *)&rif_name)[1]));	
}

SceNpDrm

_sceNpDrmCheckDrmReset

Version NID
1.000.071-3.740.011 0x4458812B 
//opt is of size 0x18
int _sceNpDrmCheckDrmReset(int unk0, int unk1, void *opt);

_sceNpDrmRemoveActData

Version NID
1.000.071-3.740.011 0x507D06A6

Removes NPDRM per-console activation data at tm0:/npdrm/act.dat. 

// pAccountId of removed tm0:/npdrm/act.dat
>int _sceNpDrmRemoveActData(SceUInt64 *pAccountId);

_sceNpDrmGetRifName

Version NID
1.000.071-3.740.011 0xB8C5DA7C 
int _sceNpDrmGetRifName(char *rif_name, SceUInt64 account_id);

_sceNpDrmGetRifNameForInstall

Version NID
1.000.071-3.740.011 0xD312424D 
// rif_name is of size 0x30
// rif is of size 0x200
// num: must be 1
int _sceNpDrmGetRifNameForInstall(char *rif_name, void *rif, int num);

_sceNpDrmGetRifInfo

Version NID
1.000.071-3.740.011 0xE8343660 
typedef struct rif_info { // size is 0x70
   char content_id[0x30];
   char version_number[4];
   char rif_lic_flags[4];
   char drm_type0[4]; // DRM type related
   char drm_type1[4]; // DRM type related
   char account_id[8];
   char rif_data_0x98[8];
   uint64_t lic_start_time;
   uint64_t lic_exp_time;
   char klicensee[0x10];
} rif_info;

typedef struct _sceNpDrmGetRifInfo_opt { // size is 0x28
  void* content_id;
  void* account_id;
  void* version_number;
  void* rif_lic_flags;
  void* lic_type0; // DRM type related
  void* lic_type1; // DRM type related
  void* lic_start_time;
  void* lic_exp_time;
  void* rif_data_0x98;
} _sceNpDrmGetRifInfo_opt;

// rif is of size 0x200
int _sceNpDrmGetRifInfo(void* rif, SceSize rif_size, SceUInt32 num, _sceNpDrmGetRifInfo_opt* pOpt);

_sceNpDrmGetFixedRifName

Version NID
1.000.071-3.740.011 0xE935B0FC 
int _sceNpDrmGetFixedRifName(char *name, uint64_t account_id);

_sceNpDrmCheckActData

Version NID
1.000.071-3.740.011 0xFEEBCD62 
// opt is of size 0x10
int _sceNpDrmCheckActData(int unk0, int unk1, int unk2, void* opt);

_sceNpDrmPresetRifProvisionalFlag

Version NID
0.931.010-1.692.000 not present
1.800.071-3.740.011 0x2523F57F 
// rif is of size 0x200
int _sceNpDrmPresetRifProvisionalFlag(void* rif);

SceNpDrmForDriver

sceNpDrmGetRifInfoForDriver

Version NID
3.60 0xDB406EAE 
 
// content_id is of size 0x30
int sceNpDrmGetRifInfoForDriver(const void *license, SceSize license_size, int check_sign, char *content_id, SceUInt64 *pAccountId, int *pLicenseVersion, int *pLicenseFlags, int *flags, int *sku_flags, SceInt64 *lic_start_time, SceInt64 *lic_exp_time, SceUInt64 *flags2);

sceNpDrmPackageSetGameExistForDriver

Version NID
3.60 0x3BFD2850 
int sceNpDrmPackageSetGameExistForDriver(int value);

sceNpDrmGetFixedRifNameForDriver

Version NID
3.60 0x5D73448C 
// name is of size 0x30
int sceNpDrmGetFixedRifNameForDriver(char *name, SceUInt64 account_id);

sceNpDrmGetRifNameForDriver

Version NID
3.60 0xDF62F3B8 
// name is of size 0x30
int sceNpDrmGetRifNameForDriver(char *name, SceUInt64 account_id);

sceNpDrmGetRifNameForInstallForDriver

Version NID
3.60 0x17573133 
// name is of size 0x30
// if not_use_content_id is zero, use license content id
int sceNpDrmGetRifNameForInstallForDriver(char *name, const void *license, int not_use_content_id);

sceNpDrmPresetRifProvisionalFlagForDriver

Version NID
3.60 0xC070FE89

Updating license data. 

int sceNpDrmPresetRifProvisionalFlagForDriver(void *license, int unk2);

sceNpDrmCheckActDataForDriver

Version NID
3.60 0x9265B350

Gets information about NPDRM per-console activation data at tm0:/npdrm/act.dat. 

//size of act data is 0x1040
int sceNpDrmCheckActDataForDriver(int *act_type, int *unk2, SceUInt64 *pAccountId, SceInt64 *act_start_time, SceInt64 *act_exp_time);

sceNpDrmRemoveActDataForDriver

Version NID
3.60 0x8B85A509

Removes NPDRM per-console activation data at tm0:/npdrm/act.dat. 

// pAccountId of removed tm0:/npdrm/act.dat
int sceNpDrmRemoveActDataForDriver(SceUInt64 *pAccountId);

sceNpDrmUpdateAccountIdForDriver

Version NID
3.60 0x116FC0D6 
int sceNpDrmUpdateAccountIdForDriver(SceUInt64 account_id);

sceNpDrmEbootSigGenMultiDiscForDriver

Version NID
3.60 0x39A7A666 
// dst is of size 0x200
int sceNpDrmEbootSigGenMultiDiscForDriver(const char *path, const void *some_sig, void *dst, SceUInt32 systemSwVersion);

sceNpDrmEbootSigGenPs1ForDriver

Version NID
3.60 0x6D9223E1 
// dst is of size 0x200
int sceNpDrmEbootSigGenPs1ForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);

sceNpDrmGetLegacyDocKeyForDriver

Version NID
3.60 0x4E321BDE

Gets klicensee to decrypt encrypted DOCUMENT.DAT. 

// pLegacyDocKey is of size 0x10 bytes
int sceNpDrmGetLegacyDocKeyForDriver(void *pRif, void *pDocEdat, SceSize docEdatSize, void *pLegacyDocKey);

sceNpDrmEbootSigVerifyForDriver

Version NID
3.60 0x7A319692

drm_data - __sce_ebootpbp or license data, size is 0x200. 

int sceNpDrmEbootSigVerifyForDriver(const char *path, void *drm_data);

sceNpDrmEbootSigGenPspForDriver

Version NID
3.60 0x90B1A6D3 
// dst is of size 0x200
int sceNpDrmEbootSigGenPspForDriver(const char *path, const void *hash_sha256, void *dst, SceUInt32 systemSwVersion);

sceNpDrmEbootSigConvertForDriver

Version NID
3.60 0xA29B75F9 
// dst is of size 0x200
int sceNpDrmEbootSigConvertForDriver(const char *path, const void *some_sig, void *dst);

sceNpDrmPspEbootVerifyForDriver

Version NID
3.60 0xB6CA3A2C 
int sceNpDrmPspEbootVerifyForDriver(const char *path, const void *some_sig);

sceNpDrmPspEbootSigGenForDriver

Version NID
3.60 0xEF387FC4 
// dst is of size 0x100
int sceNpDrmPspEbootSigGenForDriver(const char *path, const void *hash_sha256, void *dst);

sceNpDrmIsLooseAccountBindForDriver

Version NID
3.60 0xFC84CA1A 
int sceNpDrmIsLooseAccountBindForDriver(void);

sceNpDrmUpdateDebugSettingsForDriver

Version NID
3.60 0xA91C7443

checks /CONFIG/NP debug_upgradable and /CONFIG/NP2 debug_drm_loose_bind registry values 

int sceNpDrmUpdateDebugSettingsForDriver(void);

sceNpDrmGetRifPspKeyForDriver

Version NID
3.60 0xDACB71F4 
int sceNpDrmGetRifPspKeyForDriver(const void *license, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);

sceNpDrmGetRifVitaKeyForDriver

Version NID
3.60 0x723322B5

It uses #sceNpDrmGetRifInfoForDriver to get required fields. 

int sceNpDrmGetRifVitaKeyForDriver(const void *license, void *klicensee, SceUInt32 *flags, SceUInt32 *sku_flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);

sceNpDrmWriteActDataForDriver

Version NID
0.990-3.60 0x742EBAF4

Related to SceSblGcAuthMgr#_sceSblGcAuthMgrPcactActivation.

decrypts act_data with aes_dec_key and stores it to data segment

verifies sha1 - ecdsa or sha256 - RSA

checks Loose Account Bind flag

verifies OpenPsId

creates tm0:/npdrm folder

writes tm0:/npdrm/act.dat file

repeats all verification steps

decrypts Primary Key Table 

// npdrm_act_data is of size 0x1040
int sceNpDrmWriteActDataForDriver(void *npdrm_act_data, const char *aes_dec_key);

sceNpDrmReadActDataForDriver

Version NID
3.60 0xD91C3BCE

Related to sceSblGcAuthMgrPcactGetChallenge

reads 0x1038 bytes of tm0:/npdrm/act.dat data 

// act_data is of size 0x1038
int sceNpDrmReadActDataForDriver(void *act_data);

sceNpDrmVerifyRifForDriver

Version NID
3.60 0xFE7B17B6

verify ECDSA - SHA1 pair or RSA - SHA256 pair 

// rif max size is 0x200
int sceNpDrmVerifyRifForDriver(void *rif, SceSize rif_size);

sceNpDrmVerifyRifFullForDriver

Version NID
3.60 0xFF63672D

check OpenPsId

check cmd56 handshake part

perform steps to get decrypted rif key 

// rif size is unknown but at least 0xF8
int sceNpDrmVerifyRifFullForDriver(void *rif);

sceNpDrmUpdateActDataForDriver

Version NID
3.60 0x77926F5

reads tm0:/npdrm/act.dat

verifies ECDSA with sha1 and RSA with sha256

checks Loose Account Bind flag

verifies OpenPsId

clears Secondary Table, RSA Signature, Unknown Sig, ECDSA Signature

decrypts Primary Key Table 

int sceNpDrmUpdateActDataForDriver(void);

SceNpDrmPackage

_sceNpDrmPackageTransform

Version NID
1.69-3.60 0x0567DCA1 
// opt is of size 0x28
int _sceNpDrmPackageTransform(int unk0, int unk1, void* opt, int unk3);

_sceNpDrmPackageInstallFinished

Version NID
1.69-3.60 0x6896EAF2 
// opt is of size 0x8
int _sceNpDrmPackageInstallFinished(int unk0, int unk1, int unk2, void* opt);

_sceNpDrmPackageCheck

Version NID
1.69-3.60 0xA1D885FA 
int _sceNpDrmPackageCheck(const void *buffer1, SceSize size, void *buffer2, SceUInt32 identifier);

sceNpDrmPackageIsGameExist

Version NID
1.69-3.60 0xB9337914 
int sceNpDrmPackageIsGameExist();

_sceNpDrmPackageInstallStarted

Version NID
1.69-3.60 0xCEC18DA4 
// opt is of size 0x10
int _sceNpDrmPackageInstallStarted(int unk0, int unk1, int unk2, void* opt);

_sceNpDrmPackageDecrypt

Version NID
1.69-3.60 0xD6F05ACC 
typedef struct _sceNpDrmPackageDecrypt { // size is 0x10
  SceOff offset; //The offset in the encrypted data
  unsigned int identifier;
  uint32_t unk_C;
} _sceNpDrmPackageDecrypt_opt;

int _sceNpDrmPackageDecrypt(void * buffer, SceSize size, _sceNpDrmPackageDecrypt_opt * opt);

sceNpDrmPackageInstallOngoing

Version NID
1.69-3.60 0xED0471FE 
int sceNpDrmPackageInstallOngoing(int unk0, int unk1);

_sceNpDrmPackageUninstallFinished

Version NID
3.60 0x23A28861 
// opt is of size 0x8
int _sceNpDrmPackageUninstallFinished(int unk0, int unk1, int unk2, void* opt);

_sceNpDrmPackageUninstallStarted

Version NID
3.60 0x4901C3E6 
// opt is of size 0x10
int _sceNpDrmPackageUninstallStarted(int unk0, int unk1, int unk2, void* opt);

sceNpDrmPackageUninstallOngoing

Version NID
3.60 0xF1FF6193 
int sceNpDrmPackageUninstallOngoing(int unk0, int unk1);

unk_200D2DE4

Version NID
3.60 0x200D2DE4 
int unk_200D2DE4(int unk0, int unk1);

unk_4665E75A

Version NID
3.60 0x4665E75A 
// opt is of size 0x10
int unk_4665E75A(int unk0, int unk1, int unk2, void *opt);

unk_640C1724

Version NID
3.60 0x640C1724 
// opt is of size 0x8
int unk_640C1724(int unk0, int unk1, int unk2, void *opt);

unk_97BB85BD

Version NID
3.60 0x97BB85BD 
// opt is of size 0x10
int unk_97BB85BD(int unk0, int unk1, int unk2, void *opt)

unk_A5E0F38C

Version NID
3.60 0xA5E0F38C 
int unk_A5E0F38C(int unk0, int unk1);

unk_C75A775B

Version NID
3.60 0xC75A775B 
// opt is of size 0x8
int unk_C75A775B(int unk0, int unk1, int unk2, void *opt);

ScePsmDrm

scePsmDrmGetRifName

Version NID
3.60 0x0D6470DA

This is a guessed name. 

// rif is of size 0x400
int scePsmDrmGetRifName(char *rif_name, void *rif);

scePsmDrmGetDebugRifName

Version NID
3.60 0x3E881391

This is a guessed name. 

int scePsmDrmGetDebugRifName(char *rif_name);

scePsmDrmGetRifInfo

Version NID
3.60 0xE31A6220 
typedef struct ScePsmDrmGetRifInfoOpt { //size is 0x10
 SceUInt64 lic_start_time;
 SceUInt64 lic_exp_time;
} ScePsmDrmGetRifInfoOpt;

int scePsmDrmGetRifInfo(void *rif, char *content_id, void *account_id, ScePsmDrmGetRifInfoOpt *pOpt);

scePsmDrmGetPsmRifKey

Version NID
3.60 0x207A2C53 
/**
* rif is of size 0x400
* klicensee is of size 0x200
**/
int scePsmDrmGetPsmRifKey(void *rif, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);

scePsmDrmRemoveActData

Version NID
3.60 0x0E193CBB 
// pAccountId of removed tm0:/psmdrm/act.dat
int scePsmDrmRemoveActData(SceUInt64 *pAccountId);

ScePsmDrm_A89653B3

Version NID
3.60 0xA89653B3

Calls #ScePsmDrmForDriver_B09003A7. 

typedef struct ScePsmDrm_A89653B3_Opt { // size is 0x10
SceUInt64 info4;
SceUInt64 info5;
} ScePsmDrm_A89653B3_Opt;

int ScePsmDrm_A89653B3(SceUInt32 *pInfo1, SceUInt32 *pInfo2, SceUInt64 *pInfo3, ScePsmDrm_A89653B3_Opt *pOpt);

ScePsmDrmForDriver

scePsmDrmGetRifInfoForDriver

Version NID
3.60 0x984F9017

This function is named after sceNpDrmGetRifInfoForDriver since arguments are very similar. 

// rif is of size 0x400
// content_id is of size 0x30
int scePsmDrmGetRifInfoForDriver(void *rif, char *content_id, SceUInt64 *account_id, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);

scePsmDrmGetRifPsmKeyForDriver

Version NID
3.60 0x8C8CFD01

this function is named after sceNpDrmGetRifInfoForDriver since arguments are very similar 

// rif is of size 0x400
// klicensee is of size 0x200
int scePsmDrmGetRifPsmKeyForDriver(void *rif, void *klicensee, SceUInt32 *flags, SceUInt64 *lic_start_time, SceUInt64 *lic_exp_time);

scePsmDrmWriteActDataForDriver

Version NID
3.60 0xCB73E9D3

decrypts psm_act_data with aes_dec_key

creates tm0:/psmdrm if necessary

writes tm0:/psmdrm/act.dat

verifies sha256 - rca 

//data is of size 0x400
int scePsmDrmWriteActDataForDriver(void *psm_act_data, const char *aes_dec_key);

scePsmDrmRemoveActDataForDriver

Version NID
3.60 0x4CD5375C

Removes PSM DRM per-console activation data at tm0:/psmdrm/act.dat. 

// pAccountId of removed tm0:/psmdrm/act.dat
int scePsmDrmRemoveActDataForDriver(SceUInt64 *pAccountId);

ScePsmDrmForDriver_791198CE

Version NID
3.60 0x791198CE 
int ScePsmDrmForDriver_791198CE();

ScePsmDrmForDriver_B09003A7

Version NID
3.60 0xB09003A7

Gets information about PSM RIF or ACT.DAT. 

int ScePsmDrmForDriver_B09003A7(SceUInt32 *pInfo1, SceUInt32 *pInfo2, SceUInt64 *pInfo3, SceUInt64 *pInfo4, SceUInt64 *pInfo5);

Package integrity checks

Disable hash/signature verification

To find the function responsible for package verification search for immediate 0x7F504B47 ('.PKG'). Inside it does a lot of stuff including determining the function that will do signature checks. Find the condition that looks like if ( (v62 & 7) == 3 ); below you will see the assignment check_func = &off_81009CFC;. To bypass signature checks you need to patch two functions located at this offset and offset+4, making them behave as "return 1" is enough. For reference, on 1.60 the functions are sub_81000310 and sub_81000AA4. sub_81000310 is the only function in this module that calls SceSblGcAuthMgrPkgForDriver_E459A9A8_imp.

Note that on 1.60 this module sometimes is loaded at different addresses between reboots.

Allow debug packages to be installed

Find the function that calls sceSblAIMgrIsCEXForDriver. Patch it to always return 1. On FW 1.60 it is at 0x81002d64.

Search for immediate 0x80870003, there should be two matches. Replace both with "MOV Reg, #0". On 1.60 the locations are 0x810035fe and 0x81004856.

RIF

The RIF file holds the klicensee for NPDRM contents. The RIF files are used as DRM licenses. For each installed PKG and Game Card you have a unique RIF file with proper information that is used when you open the game to verify if you own the game (or PKG). The RIF files holds important information as PSN Account ID, the key used to decrypt one of the SELF encryption layers.

PS Vita supports two different RIF file formats. The first format version (v0) is used by RIF files with 0x98 bytes size and the second version (v1) is used by RIF files with 0x200 bytes size. The difference between these formats is just the signature and some data used by PS Vita only. RIF version 0 only uses ECDSA Signature only whilst RIF Version 1 uses the ECDSA Signature and an extra RSA Signature.

Name Offset Size Remarks
Version 0x0 0x2
Version Flag 0x2 0x2 0 or 1
License Flags 0x4 0x2 See [1].
DRM Type 0x6 0x2 See [2].
NP Account ID 0x8 0x8 NP Account ID (in little-endian) for Network and Local DRM, 8 first bytes of sha-1 of some key for Free DRM.
Content ID 0x10 0x30 CONTENT_ID
Encrypted account keyring index 0x40 0x10 Encrypted account keyring index for Network and Local DRM, 12 last bytes of sha-1 of some key + 4 bytes of zeroes for Free DRM.
Encrypted RIF Key 0x50 0x10 Used to get klicensee to decrypt NPDRM SELF/SPRX/EDAT/PFS files.
License start time 0x60 0x8 For human readable, convert to decimal and use an Epoch-Unix converter time format online.
License expiration time 0x68 0x8 If zeroed, there is no time limit. Used for PS+ time-limited content for example.
ECDSA Signature 0x70 0x28 Patched in most PS3 CFWs to allow unsigned RIF. See Rif_Junk on Rap2Rif by Flatz. Params are same as for act.dat.
Some Flag 0x98 0x4 Used by PS Vita only, not PSP nor PS3.
Some Flag 0x9C 0x4 Used by PS Vita only, not PSP nor PS3. ex: ?0x400?.
Encrypted RIF Key 2 0xA0 0x10 Used by PS Vita only, not PSP nor PS3. Used to get klicensee to decrypt NPDRM SELF/SPRX/EDAT/PFS files.
Unknown_B0 0xB0 0x10 Used by PS Vita only, not PSP nor PS3.
OpenPsId 0xC0 0x10 Used by PS Vita only, not PSP nor PS3. Checked only if License Flag 0x100 is set.
Unknown_D0 0xD0 0x10 Used by PS Vita only, not PSP nor PS3.
CMD56 handshake part 0xE0 0x14 Used by PS Vita only, not PSP nor PS3. Checked only if License Flag 0x400 is set.
Unknown_F4 0xF4 0x4 Used by PS Vita only, not PSP nor PS3. Some flag related to debug_upgradable. ex: 0 (default), 1 (seen on a PSP2 gamecard).
Unknown_F8 0xF8 0x4 Used by PS Vita only, not PSP nor PS3.
SKU flag 0xFC 0x4 Used by PS Vita only, not PSP nor PS3. Some flag related to debug_upgradable.
RSA Signature 0x100 0x100 Used by PS Vita only, not PSP nor PS3.

PSM-ACT

PSM Activation file

Name Offset Size Example Remark
Magic 0x0 0x8 "PSM-ACT"
Unknown1 0x8 0x8 00 00 00 00 00 00 00 00
Account Id 0x10 0x8 91 78 34 02 01 EF CD AB PSN account ID (little endian)
Unknown2 0x18 0x4 00 00 00 00 Must be 0
Unknown3 0x1C 0x4 00 00 00 00 Must be 0
Activation start time 0x20 0x8 00 00 01 4C 16 4D 83 A8
Activation expiration time 0x28 0x8 00 00 04 2A D4 3D 3E 68
SHA256 from act.dat 0x30 0x20 SHA256 digest of get_act_data (0x39222A58)
Unknown4 0x50 0xB0 Zeros
Unknown5 0x100 0x200 KEY saved at 0x22C8 - Decrypted with 0x2288
RSA signature 0x300 0x100

PSM-RIF

PSM RIF file

Name Offset Size Example Remark
Magic 0x0 0x8 "PSM-RIF"
Unknown1 0x8 0x4 00 00 00 01 Maybe Version and Version Flag?
Unknown2 0xC 0x4 00 00 00 00 Maybe DRM Type and License Flags?
Account ID 0x10 0x8 91 78 34 02 01 EF CD AB PSN account ID (little endian)
Unknown3 0x18 0x4 00 00 00 00 Must be 0
Unknown4 0x1C 0x4 00 00 00 00 Must be 0
Activation start time 0x20 0x8 00 00 01 4C 16 4D 83 A8
Activation expiration time 0x28 0x8 7F FF FF FF FF FF FF FF Max Value
SHA256 from act.dat 0x30 0x20 SHA256 digest of get_act_data (0x39222A58)
Content ID 0x50 0x30 EM0041-NPOA00013_00-0000000000000000
Unknown5 0x80 0x80 Zeros
Unknown6 0x100 0x200 Key saved at 0x1F40. First 0x200 bytes are decrypted with 0x22C8 and then only the first 0x20 bytes are again decrypted with 0x2288
RSA signature 0x300 0x100
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