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Difference between revisions of "8900 File Format"
(New page: This is the file format used by the S5L8900 ==Header== typedef struct { uchar magic[4]; // string "8900" uchar version[3]; // string "1.0" uint8 form...) |
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uchar magic[4]; // string "8900" |
uchar magic[4]; // string "8900" |
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uchar version[3]; // string "1.0" |
uchar version[3]; // string "1.0" |
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| − | uint8 format; // plaintext format is 0x4, encrypted format is 0x3 |
+ | uint8 format; // plaintext format is 0x4, encrypted with [[GID-key]] format is 0x3, boot plaintext is 0x2, boot encrypted with [[UID-key]] is 0x1. |
uint32 unknown1; |
uint32 unknown1; |
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uint32 sizeOfData; // size of data (ie, filesize - header(0x800) - footer signature(0x80) - footer certificate(0xC0A)) |
uint32 sizeOfData; // size of data (ie, filesize - header(0x800) - footer signature(0x80) - footer certificate(0xC0A)) |
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Revision as of 23:19, 27 July 2008
This is the file format used by the S5L8900
Header
typedef struct {
uchar magic[4]; // string "8900"
uchar version[3]; // string "1.0"
uint8 format; // plaintext format is 0x4, encrypted with GID-key format is 0x3, boot plaintext is 0x2, boot encrypted with UID-key is 0x1.
uint32 unknown1;
uint32 sizeOfData; // size of data (ie, filesize - header(0x800) - footer signature(0x80) - footer certificate(0xC0A))
uint32 footerSignatureOffset; // offset to footer signature
uint32 footerCertOffset; // offset to footer certificate, from end of header (0x800)
uint32 footerCertLen;
uchar salt[0x20]; // a seemingly random salt (an awfully big one though... needs more attention)
uint16 unknown2;
uint16 epoch; // the security epoch of the file
uchar headerSignature[0x10]; // encrypt(sha1(header[0:0x40])[0:0x10], key_0x837, zero_iv)
uchar padding[0x7B0];
} Apple8900Header;
