Nintendo Switch Brew

Package2: Difference between revisions

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Line 12: Line 12:
| 0x0
| 0x0
| 0x100
| 0x100
| RSA-2048 signature
| [[#Public Keys|RSA-2048]] signature (PKCS#1 v2.1 RSASSA-PSS-VERIFY with SHA256)
|-
|-
| 0x100
| 0x100
Line 40: Line 40:
| 0x0
| 0x0
| 0x10
| 0x10
| Decrypted header's CTR
| Header's CTR, official code copies the pre-decryption CTR over the decrypted result. Also used as metadata.
|-
|-
| 0x10
| 0x10
Line 64: Line 64:
| 0x54
| 0x54
| 0x4
| 0x4
| Unknown
| Base offset
|-
|-
| 0x58
| 0x58
| 0x4
| 0x4
| Unknown
| Always 0
|-
|-
| 0x5C
| 0x5C
| 0x2
| 0x1
| Version. HighByte must be <{maxver} and LowByte must be >{minver}, where {maxver} and {minver} are constants used by TZ updated with each package1 update.
| Package2 version. Must be >= {minimum valid package2 version} constant in TZ.
|-
| 0x5D
| 0x1
| Bootloader version. Must be <= {current bootloader version} constant in TZ.
|-
|-
| 0x5E
| 0x5E
| 0x2
| 0x2
| ?
| Padding
|-
|-
| 0x60
| 0x60
Line 96: Line 100:
| 0x70
| 0x70
| 0x4
| 0x4
| Unknown
| Section 0 offset
|-
|-
| 0x74
| 0x74
| 0x4
| 0x4
| Unknown
| Section 1 offset
|-
|-
| 0x78
| 0x78
| 0x4
| 0x4
| Unknown
| Section 2 offset
|-
|-
| 0x7C
| 0x7C
| 0x4
| 0x4
| Unknown
| Section 3 offset
|-
|-
| 0x80
| 0x80
Line 128: Line 132:


Each section follows each other immediately and is encrypted with the same key used for encrypting the header.
Each section follows each other immediately and is encrypted with the same key used for encrypting the header.
The section offsets are relative to a base, which is typically 0x80000000 pointing to the base of DRAM.
Before being decrypted, the encrypted header's CTR additionally encodes metadata used to validate package2's contents as follows:
* Size of the entire package2 with the raw header = ctr_word2 ^ ctr_word3 ^ ctr_word0
* Key generation = ((ctr_word1 ^ (ctr_word1 >> 16)) & 0xFF) ^ (ctr_word1 >> 24)
In [4.0.0], the key generation must be less or equal to 4.


== Section 0 ==
== Section 0 ==
Line 134: Line 145:
== Section 1 ==
== Section 1 ==
When decrypted, this section contains the built-in system modules encapsulated in a custom format.
When decrypted, this section contains the built-in system modules encapsulated in a custom format.
Note: On firmware [[8.0.0]] INI1 is contained within the Kernel and section 1 is empty with NULL SHA256 to match.


=== INI1 ===
=== INI1 ===
Line 139: Line 152:
|-
|-
! Offset
! Offset
! Type
! Size
! Description
! Description
|-
|-
| 0x0
| 0x0
| u32
| 0x4
| Magic "INI1"
| Magic "INI1"
|-
|-
| 0x4
| 0x4
| u32
| 0x4
| Size
| Size
|-
|-
| 0x8
| 0x8
| u32
| 0x4
| NumberProcesses
| Number of KIPs (Must be lower than 0x51)
|-
|-
| 0xC
| 0xC
| u32
| 0x4
| Zero
| Reserved
|}
|}


==== KIP1 ====
==== KIP1 ====
Kernel internal process?
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Offset
! Offset
! Type
! Size
! Description
! Description
|-
|-
| 0x0
| 0x0
| u32
| 0x4
| Magic "KIP1"
| Magic "KIP1"
|-
|-
| 0x4
| 0x4
| char[12]
| 0xC
| Name
| Name
|-
|-
| 0x10
| 0x10
| u64
| 0x8
| TitleId
| Program ID
|-
|-
| 0x18
| 0x18
| u32
| 0x4
|  
| Version
|-
|-
| 0x1C
| 0x1C
| u32
| 0x1
| Flags / etc. Byte3 bit0-2: compression-enable for each section, when set.
| Main Thread Priority
|-
| 0x1D
| 0x1
| Main Thread Core Number
|-
| 0x1E
| 0x1
| Reserved
|-
| 0x1F
| 0x1
| Flags (bit0=TextCompress, bit1=RoCompress, bit2=DataCompress, bit3=Is64BitInstruction, bit4=ProcessAddressSpace64Bit, bit5=[2.0.0+] UseSecureMemory)
|-
|-
| 0x20
| 0x20
| [[#SectionHeader]][3]
| 0xC
| Sections
| Text [[#Segment_Header|Segment Header]]
|-
| 0x2C
| 0x4
| Main Thread Affinity Mask
|-
| 0x30
| 0xC
| Ro [[#Segment_Header|Segment Header]]
|-
| 0x3C
| 0x4
| Main Thread Stack Size
|-
| 0x40
| 0xC
| Data [[#Segment_Header|Segment Header]]
|-
| 0x4C
| 0x4
| Reserved
|-
|-
| 0x50
| 0x50
| char[0x20]
| 0xC
| Padding
| Bss [[#Segment_Header|Segment Header]]
|-
| 0x5C
| 0x24
| Reserved
|-
|-
| 0x70
| 0x80
| u64[0x20]
| 0x80
| KernelCaps
| [[NPDM#KernelCapability|Kernel Capability Data]]
|}
|}


===== SectionHeader =====
===== Segment Header =====
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Offset
! Offset
! Type
! Size
! Description
! Description
|-
|-
| 0x0
| 0x0
| u32
| 0x4
| OutOffset
| Offset
|-
|-
| 0x4
| 0x4
| u32
| 0x4
| DecompressedSize
| Size
|-
|-
| 0x8
| 0x8
| u32
| 0x4
| CompressedSize
| Compressed/Binary Size
|-
| 0xC
| u32
|  
|}
|}
Compressed/Binary size can be 0 or lower than expected, this is the case for BSS for example.


===== Compression =====
===== Compression =====
The compression used here is BLZ, with a modified footer since 3ds. The footer is now 0xC bytes instead of 0x8, and has the form u32 compressed_data_len; u32 initial_index; u32 additional_len_when_uncompressed;
The compression used here is BLZ, with a modified footer since 3ds. The footer is now 0xC bytes instead of 0x8, and has the form u32 compressed_data_len; u32 footer_size; u32 additional_len_when_uncompressed;


== Section 2 ==
== Section 2 ==
Line 238: Line 283:
|-
|-
! System version
! System version
! Package1 maxver constant
! Bootloader current version
! Package1 minver constant
! Package2 minimum valid version
! Package2 version field
|-
| [[1.0.0]]
| 0x1
| 0x4
|-
|-
| [[2.0.0]]
| [[2.0.0]]
| 0x2
| 0x5
|-
| [[3.0.0]]
| 0x3
| 0x3
| 0x6
|-
| [[3.0.2]]
| 0x4
| 0x4
|  
| 0x7
|-
| [[4.0.0]]
| 0x5
| 0x8
|-
| [[5.0.0]]
| 0x6
| 0x9
|-
| [[6.0.0]]
| 0x7
| 0xA
|-
| [[6.2.0]]
| 0x8
| 0xB
|-
| [[7.0.0]]
| 0x9
| 0xC
|-
| [[8.1.0]]
| 0xA
| 0xD
|-
| [[9.0.0]]
| 0xB
| 0xE
|-
| [[9.1.0]]
| 0xC
| 0xF
|-
| [[10.0.0]]
| 0xD
| 0x10
|-
| [[11.0.0]]
| 0xE
| 0x11
|-
| [[12.0.2]]
| 0xF
| 0x12
|-
| [[12.1.0]]
| 0xF
| 0x13
|-
| [[13.0.0]]
| 0xF
| 0x14
|}
|}
= Public Keys =
=== Exponent ===
0x10001
=== Retail Modulus ===
8D 13 A7 77 6A E5 DC C0 3B 25 D0 58 E4 20 69 59
55 4B AB 70 40 08 28 07 A8 A7 FD 0F 31 2E 11 FE
47 A0 F9 9D DF 80 DB 86 5A 27 89 CD 97 6C 85 C5
6C 39 7F 41 F2 FF 24 20 C3 95 A6 F7 9D 4A 45 74
8B 5D 28 8A C6 99 35 68 85 A5 64 32 80 9F D3 48
39 A2 1D 24 67 69 DF 75 AC 12 B5 BD C3 29 90 BE
37 E4 A0 80 9A BE 36 BF 1F 2C AB 2B AD F5 97 32
9A 42 9D 09 8B 08 F0 63 47 A3 E9 1B 36 D8 2D 8A
D7 E1 54 11 95 E4 45 88 69 8A 2B 35 CE D0 A5 0B
D5 5D AC DB AF 11 4D CA B8 1E E7 01 9E F4 46 A3
8A 94 6D 76 BD 8A C8 3B D2 31 58 0C 79 A8 26 E9
D1 79 9C CB D4 2B 6A 4F C6 CC CF 90 A7 B9 98 47
FD FA 4C 6C 6F 81 87 3B CA B8 50 F6 3E 39 5D 4D
97 3F 0F 35 39 53 FB FA CD AB A8 7A 62 9A 3F F2
09 27 96 3F 07 9A 91 F7 16 BF C6 3A 82 5A 4B CF
49 50 95 8C 55 80 7E 39 B1 48 05 1E 21 C7 24 4F
=== Debug Modulus ===
B3 65 54 FB 0A B0 1E 85 A7 F6 CF 91 8E BA 96 99
0D 8B 91 69 2A EE 01 20 4F 34 5C 2C 4F 4E 37 C7
F1 0B D4 CD A1 7F 93 F1 33 59 CE B1 E9 DD 26 E6
F3 BB 77 87 46 7A D6 4E 47 4A D1 41 B7 79 4A 38
06 6E CF 61 8F CD C1 40 0B FA 26 DC C0 34 51 83
D9 3B 11 54 3B 96 27 32 9A 95 BE 1E 68 11 50 A0
6B 10 A8 83 8B F5 FC BC 90 84 7A 5A 5C 43 52 E6
C8 26 E9 FE 06 A0 8B 53 0F AF 1E C4 1C 0B CF 50
1A A4 F3 5C FB F0 97 E4 DE 32 0A 9F E3 5A AA B7
44 7F 5C 33 60 B9 0F 22 2D 33 2A E9 69 79 31 42
8F E4 3A 13 8B E7 26 BD 08 87 6C A6 F2 73 F6 8E
A7 F2 FE FB 6C 28 66 0D BD D7 EB 42 A8 78 E6 B8
6B AE C7 A9 E2 40 6E 89 20 82 25 8E 3C 6A 60 D7
F3 56 8E EC 8D 51 8A 63 3C 04 78 23 0E 90 0C B4
E7 86 3B 4F 8E 13 09 47 32 0E 04 B8 4D 5B B0 46
71 B0 5C F4 AD 63 4F C5 E2 AC 1E C4 33 96 09 7B
Retrieved from "https://switchbrew.org/wiki/Package2"