42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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//As of iOS 4, class keys 1 to 4 are used for files, class 5 usage is unknown
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#define MAX_CLASS_KEYS 5
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#define CLASS_DKEY 4
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typedef struct EMFInfo
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{
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Volume* volume;
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uint64_t volume_id;
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uint64_t volume_offset;
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uint32_t classKeys_bitset;
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AES_KEY emfkey;
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AES_KEY classKeys[MAX_CLASS_KEYS];
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}EMFInfo;
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EMFInfo* EMF_init(Volume*, char*);
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#define CPROTECT_V2_LENGTH 0x38 //56
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#define CP_WRAPPEDKEYSIZE 40 /* 2x4 = 8, 8x8 = 64 */
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//http://www.opensource.apple.com/source/xnu/xnu-1699.22.73/bsd/sys/cprotect.h
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typedef struct cprotect_xattr_v2
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{
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uint16_t xattr_major_version; // =2
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uint16_t xattr_minor_version; // =0
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uint32_t flags; // leaks stack dword in one code path (cp_handle_vnop)
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uint32_t persistent_class;
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uint32_t key_size; //0x28
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uint8_t persistent_key[0x28];
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} cprotect_xattr_v2;
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#define CPROTECT_V4_LENGTH 0x4C //76
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typedef struct cprotect_xattr_v4
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{
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uint16_t xattr_major_version; // =4
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uint16_t xattr_minor_version; // =0
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uint32_t xxx_length; // 0xc
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uint32_t protection_class_id;
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uint32_t wrapped_length; //0x28
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uint8_t xxx_junk[20]; //uninitialized ?
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uint8_t wrapped_key[0x28];
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} cprotect_xattr_v4;
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