99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
#ifndef FILEVAULT_H
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#define FILEVAULT_H
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#include <stdint.h>
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#include "dmg.h"
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#ifdef HAVE_CRYPT
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#include <openssl/hmac.h>
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#include <openssl/aes.h>
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#define FILEVAULT_CIPHER_KEY_LENGTH 16
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#define FILEVAULT_CIPHER_BLOCKSIZE 16
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#define FILEVAULT_CHUNK_SIZE 4096
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#define FILEVAULT_PBKDF2_ITER_COUNT 1000
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#define FILEVAULT_MSGDGST_LENGTH 20
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/*
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* Information about the FileVault format was yoinked from vfdecrypt, which was written by Ralf-Philipp Weinmann <ralf@coderpunks.org>,
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* Jacob Appelbaum <jacob@appelbaum.net>, and Christian Fromme <kaner@strace.org>
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*/
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#define FILEVAULT_V2_SIGNATURE 0x656e637263647361ULL
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typedef struct FileVaultV1Header {
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uint8_t padding1[48];
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uint32_t kdfIterationCount;
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uint32_t kdfSaltLen;
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uint8_t kdfSalt[48];
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uint8_t unwrapIV[0x20];
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uint32_t wrappedAESKeyLen;
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uint8_t wrappedAESKey[296];
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uint32_t wrappedHMACSHA1KeyLen;
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uint8_t wrappedHMACSHA1Key[300];
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uint32_t integrityKeyLen;
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uint8_t integrityKey[48];
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uint8_t padding2[484];
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} __attribute__((__packed__)) FileVaultV1Header;
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typedef struct FileVaultV2Header {
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uint64_t signature;
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uint32_t version;
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uint32_t encIVSize;
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uint32_t unk1;
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uint32_t unk2;
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uint32_t unk3;
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uint32_t unk4;
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uint32_t unk5;
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UDIFID uuid;
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uint32_t blockSize;
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uint64_t dataSize;
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uint64_t dataOffset;
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uint8_t padding[0x260];
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uint32_t kdfAlgorithm;
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uint32_t kdfPRNGAlgorithm;
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uint32_t kdfIterationCount;
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uint32_t kdfSaltLen;
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uint8_t kdfSalt[0x20];
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uint32_t blobEncIVSize;
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uint8_t blobEncIV[0x20];
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uint32_t blobEncKeyBits;
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uint32_t blobEncAlgorithm;
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uint32_t blobEncPadding;
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uint32_t blobEncMode;
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uint32_t encryptedKeyblobSize;
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uint8_t encryptedKeyblob[0x30];
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} __attribute__((__packed__)) FileVaultV2Header;
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typedef struct FileVaultInfo {
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union {
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FileVaultV1Header v1;
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FileVaultV2Header v2;
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} header;
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uint8_t version;
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uint64_t dataOffset;
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uint64_t dataSize;
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uint32_t blockSize;
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AbstractFile* file;
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HMAC_CTX hmacCTX;
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AES_KEY aesKey;
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AES_KEY aesEncKey;
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off_t offset;
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uint32_t curChunk;
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unsigned char chunk[FILEVAULT_CHUNK_SIZE];
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char dirty;
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char headerDirty;
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} FileVaultInfo;
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#endif
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AbstractFile* createAbstractFileFromFileVault(AbstractFile* file, const char* key);
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#endif
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