initial code for dumping imessages in a reasonable format

dump-imessages/iphone-dataprotection/emf_decrypter/includes/abstractfile.h

@@ -0,0 +1,75 @@
+#ifndef ABSTRACTFILE_H
+#define ABSTRACTFILE_H
+
+#include "common.h"
+#include <stdint.h>
+
+typedef struct AbstractFile AbstractFile;
+typedef struct AbstractFile2 AbstractFile2;
+
+typedef size_t (*WriteFunc)(AbstractFile* file, const void* data, size_t len);
+typedef size_t (*ReadFunc)(AbstractFile* file, void* data, size_t len);
+typedef int (*SeekFunc)(AbstractFile* file, off_t offset);
+typedef off_t (*TellFunc)(AbstractFile* file);
+typedef void (*CloseFunc)(AbstractFile* file);
+typedef off_t (*GetLengthFunc)(AbstractFile* file);
+typedef void (*SetKeyFunc)(AbstractFile2* file, const unsigned int* key, const unsigned int* iv);
+
+typedef enum AbstractFileType {
+	AbstractFileTypeFile,
+	AbstractFileType8900,
+	AbstractFileTypeImg2,
+	AbstractFileTypeImg3,
+	AbstractFileTypeLZSS,
+	AbstractFileTypeIBootIM,
+	AbstractFileTypeMem,
+	AbstractFileTypeMemFile,
+	AbstractFileTypeDummy
+} AbstractFileType;
+
+struct AbstractFile {
+	void* data;
+	WriteFunc write;
+	ReadFunc read;
+	SeekFunc seek;
+	TellFunc tell;
+	GetLengthFunc getLength;
+	CloseFunc close;
+	AbstractFileType type;
+};
+
+struct AbstractFile2 {
+	AbstractFile super;
+	SetKeyFunc setKey;
+};
+
+
+typedef struct {
+	size_t offset;
+	void** buffer;
+	size_t bufferSize;
+} MemWrapperInfo;
+
+typedef struct {
+	size_t offset;
+	void** buffer;
+	size_t* bufferSize;
+	size_t actualBufferSize;
+} MemFileWrapperInfo;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+	AbstractFile* createAbstractFileFromFile(FILE* file);
+	AbstractFile* createAbstractFileFromDummy();
+	AbstractFile* createAbstractFileFromMemory(void** buffer, size_t size);
+	AbstractFile* createAbstractFileFromMemoryFile(void** buffer, size_t* size);
+	AbstractFile* createAbstractFileFromMemoryFileBuffer(void** buffer, size_t* size, size_t actualBufferSize);
+	void abstractFilePrint(AbstractFile* file, const char* format, ...);
+	io_func* IOFuncFromAbstractFile(AbstractFile* file);
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+