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37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
// encoding: UTF-8
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#ifndef __CRYPTO_H__
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#define __CRYPTO_H__
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#include <stdbool.h>
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#ifdef _DEBUG
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#define BUG1(a,b) { perror("a"); }
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#define BUG(a) { perror("a"); }
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#else
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#define BUG1(a,b) ((void)0);
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#define BUG(a) ((void)0);
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#endif
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#define PREAMBLE_SIZE 8 // 4 byte signature + 4 byte subfile type
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#define PAD_SLOP 16 // padding for block chain
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#define KEY_BYTES 32 // 32 bytes = 256 bits of key
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#define PREAMBLE 0x01020304 // first 4 bytes of the file
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#define FILEKEY_FORMAT 1 // next 4 bytes determine version/format
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#define MASTERKEY_FORMAT 2 // format with master key
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#define MASTER_KEY_OFFSET (PREAMBLE_SIZE+AES_MAX_IV_SIZE)
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#define UNUSED(expr) (void)(expr)
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#define DECRYPT_SUCCESS 0x00
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#define DECRYPT_FREAD_FAILED 0x01
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#define DECRYPT_WRONG_PASS 0x02
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#define DECRYPT_NO_ENCRYPTION 0x04
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#define DECRYPT_CANCELED_NO_PASS 0x08
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#define DECRYPT_FATAL_ERROR 0x10
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int ReadAndDecryptFile(HWND hwnd, HANDLE hFile, size_t size, void** result, size_t *resultlen);
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bool EncryptAndWriteFile(HWND hwnd, HANDLE hFile, BYTE *data, size_t size, size_t*written);
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bool GetFileKey(HWND hwnd);
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void ResetEncryption();
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#endif
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