AndroidManifest.xml文件格式

AndroidManifest.xml文件格式

结构详解

xml文件头

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typedef struct {
ushort type <format=hex>;
ushort head_size;
int size;
} axml_header;

4字节:魔数(类型标识+头部结构大小)
4字节:文件大小

字符串区块

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typedef struct {
axml_header header;
int string_count;
int style_count;
int flag;
int string_offset;
int style_offset;
if (string_count > 0) {
axml_string_offset string_offsets[string_count] <comment="String item">;
}

if (style_count > 0) {
uint style_offsets[style_count];
off = style_offset - string_offset;
} else {
off = header.size - string_offset;
}

FSkip(off);
} axml_strings;

字符串区块头(和xml头结构一致)
2字节:类型标识
2字节:头部大小
4字节:字符串区块大小

4字节:字符串数目
4字节:样式数目
4字节:缺省位置
4字节:字符串池的偏移量(字符串池起始距离字符串区块头起始位置的偏移量)
4字节:样式池的偏移量

string_count 4字节:string_count个字符串偏移信息块
style_count
4字节: style_count个样式偏移信息块

字符串偏移信息块

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typedef struct {
uint offset;

local int64 pos = FTell();
local int off = sizeof(file.header) + file.strings.string_offset + offset;
FSeek(g_offset + off);
// Printf("offset=%x\n", off);

local int isUtf8 = parentof(this).flag & (1<<8);
if (isUtf8)
axml_string8 astr;
else
axml_string16 astr;

FSeek(pos);
} axml_string_offset <read=AxmlStringRead, optimize=false>;

每个块只有4字节,记录对应字符串起始距离字符串池起始的偏移量
索引偏移信息块对应的字符串:
字符串位置=xml文件头大小+字符串池偏移量+对应字符串偏移信息(就是本块内的数据)
检查对应字符串是否是utf-8编码,解析结构不同

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typedef struct {
axml_header header;

local int count = (header.size-8) / 4;
uint ids[count] <format=hex>;
} axml_resources;

资源区块头(和xml头结构一致)
2字节:类型标识
2字节:头部大小
4字节:资源区块大小

资源数量=(区块大小-8字节头部大小)/4(资源一项为4字节)
一个资源列表,资源为ID值,这些ID对应android中实际的资源。
一个ID值由PackageID、TypeID、EntryID组成。

CHUNK

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typedef struct {
uint type <format=hex, read=AxmlTypeString, comment="Chunk Type">;
int chunk_size;
int linenumber;
int comment;

if (type == CHUNK_STARTTAG) {
int uri <read=AxmlStringById>;
int name <read=AxmlStringById>;
ushort attr_start;
ushort attr_size;
ushort attr_count;
ushort idIndex;
ushort classIndex;
ushort styleIndex;
if (attr_count > 0) {
axml_attr attrs[attr_count];
}
} else if (type == CHUNK_ENDTAG) {
int url;
int name <read=AxmlStringById>;
} else if (type == CHUNK_STARTNS) {
int prefix <read=AxmlStringById>;
int uri <read=AxmlStringById>;
} else if (type == CHUNK_ENDNS) {
int prefix <read=AxmlStringById>;
int uri <read=AxmlStringById>;
} else if (type == CHUNK_TEXT) {
int text;
int unknow;
}
} axml_node <read=AxmlNodeRead>;

Chunk通用结构:
4字节chunk类型
4字节chunk大小
4字节行号
4字节未定义区

接下来会根据不同chunk类型,相对应不同结构

NAMESPACE START

命名空间开端
4字节Prefix,命名空间前缀(在字符串池中的索引值)
4字节Uri,命名空间的URI(在字符串池中的索引值)

TAG START

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int uri <read=AxmlStringById>;
int name <read=AxmlStringById>;
ushort attr_start;
ushort attr_size;
ushort attr_count;
ushort idIndex;
uint attr_class;
axml_attr attrs[attr_count];

标签开端
4字节Uri,标签对应的命名空间的URI(在字符串池中的索引值)
4字节Name,标签名称(在字符串池中的索引值)
2字节attr_start,标识为标签开端
2字节attr_size,标识为单条属性大小
2字节attr_count,该标签属性数目
2字节idIndex,不明
4字节attr_class,标签类属性
attr_count*attr_count字节,属性内容列表

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typedef struct {
int url <read=AxmlStringById>;
int name <read=AxmlStringById>;
int str <read=AxmlStringById>;

axml_value value;
} axml_attr <read=AxmlAttrRead>;

4字节Uri,属性对应的命名空间的URI(在字符串池中的索引值)
4字节Name,属性名称(在字符串池中的索引值)
4字节str,属性值(在字符串池中的索引值)
8字节value包含data结构大小、data类型、data(在字符串池中的索引值)

完整template

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LittleEndian();

local int g_offset = 0;

enum {
RES_NULL_TYPE = 0x0000,
RES_STRING_POOL_TYPE = 0x0001,
RES_TABLE_TYPE = 0x0002,
RES_XML_TYPE = 0x0003,

// Chunk types in RES_XML_TYPE
RES_XML_FIRST_CHUNK_TYPE = 0x0100,
RES_XML_START_NAMESPACE_TYPE= 0x0100,
RES_XML_END_NAMESPACE_TYPE = 0x0101,
RES_XML_START_ELEMENT_TYPE = 0x0102,
RES_XML_END_ELEMENT_TYPE = 0x0103,
RES_XML_CDATA_TYPE = 0x0104,
RES_XML_LAST_CHUNK_TYPE = 0x017f,
// This contains a uint32_t array mapping strings in the string
// pool back to resource identifiers. It is optional.
RES_XML_RESOURCE_MAP_TYPE = 0x0180,

// Chunk types in RES_TABLE_TYPE
RES_TABLE_PACKAGE_TYPE = 0x0200,
RES_TABLE_TYPE_TYPE = 0x0201,
RES_TABLE_TYPE_SPEC_TYPE = 0x0202
};

typedef enum <uint> {
CHUNK_HEAD = 0x00080003,
CHUNK_STRING = 0x001c0001,
CHUNK_RESOURCE = 0x00080180,
CHUNK_STARTNS = 0x00100100,
CHUNK_ENDNS = 0x00100101,
CHUNK_STARTTAG = 0x00100102,
CHUNK_ENDTAG = 0x00100103,
CHUNK_TEXT = 0x00100104
} axml_type;

// DimemsionTable[8] = {"px", "dip", "sp", "pt", "in", "mm", "", ""};
typedef enum <uint> {
px = 0,
dip,
sp,
pt,
in,
mm
} axml_dimension;

local float RadixTable[8] = {0.00390625f, 3.051758E-005f, 1.192093E-007f, 4.656613E-010f};

/* attributes' types */
typedef enum<uint> {

ATTR_NULL = 0,
ATTR_REFERENCE = 1,
ATTR_ATTRIBUTE = 2,
ATTR_STRING = 3,
ATTR_FLOAT = 4,
ATTR_DIMENSION = 5,
ATTR_FRACTION = 6,

ATTR_FIRSTINT = 16,

ATTR_DEC = 16,
ATTR_HEX = 17,
ATTR_BOOLEAN = 18,

ATTR_FIRSTCOLOR = 28,
ATTR_ARGB8 = 28,
ATTR_RGB8 = 29,
ATTR_ARGB4 = 30,
ATTR_RGB4 = 31,
ATTR_LASTCOLOR = 31,

ATTR_LASTINT = 31,
} axml_attr_type;

typedef struct {
ushort type <format=hex>;
ushort head_size;
int size;
} axml_header;

typedef struct {
uchar len;
uchar enc_len;
if (len > 0) {
char data[len];
}
} axml_string8;

typedef struct {
ushort len;
if (len > 0) {
wchar_t data[len];
}
} axml_string16;

typedef struct {
uint offset;

local int64 pos = FTell();
local int off = sizeof(file.header) + file.strings.string_offset + offset;
FSeek(g_offset + off);
// Printf("offset=%x\n", off);

local int isUtf8 = parentof(this).flag & (1<<8);
if (isUtf8)
axml_string8 astr;
else
axml_string16 astr;

FSeek(pos);
} axml_string_offset <read=AxmlStringRead, optimize=false>;

string AxmlStringRead(axml_string_offset &o) {
if (o.astr.len > 0)
return o.astr.data;
else
return "NULL String";
}

typedef struct {
axml_header header;
int string_count;
int style_count;
int flag;
int string_offset;
int style_offset;
if (string_count > 0) {
axml_string_offset string_offsets[string_count] <comment="String item">;
}

if (style_count > 0) {
uint style_offsets[style_count];
off = style_offset - string_offset;
} else {
off = header.size - string_offset;
}

FSkip(off);
} axml_strings;

typedef struct {
axml_header header;

local int count = (header.size-8) / 4;
uint ids[count] <format=hex>;
} axml_resources;

typedef struct {
ushort size;
uchar res0;
uchar dateType <read=AxmlAttrTypeRead>;
uint data;
} axml_value;

typedef struct {
int url <read=AxmlStringById>;
int name <read=AxmlStringById>;
int str <read=AxmlStringById>;

axml_value value;
} axml_attr <read=AxmlAttrRead>;

string AxmlAttrTypeRead(uchar type) {
if (type == ATTR_NULL)
return EnumToString( ATTR_NULL );
else if (type == ATTR_REFERENCE)
return EnumToString( ATTR_REFERENCE );
else if (type == ATTR_ATTRIBUTE)
return EnumToString( ATTR_ATTRIBUTE );
else if (type == ATTR_STRING)
return EnumToString( ATTR_STRING );
else if (type == ATTR_FLOAT)
return EnumToString( ATTR_FLOAT );
else if (type == ATTR_DIMENSION)
return EnumToString( ATTR_DIMENSION );
else if (type == ATTR_FRACTION)
return EnumToString( ATTR_FRACTION );
else if (type == ATTR_DEC)
return EnumToString( ATTR_DEC );
else if (type == ATTR_HEX)
return EnumToString( ATTR_HEX );
else if (type == ATTR_BOOLEAN)
return EnumToString( ATTR_BOOLEAN );
else if (type == ATTR_ARGB8)
return EnumToString( ATTR_ARGB8 );
else if (type == ATTR_RGB8)
return EnumToString( ATTR_RGB8 );
else if (type == ATTR_ARGB4)
return EnumToString( ATTR_ARGB4 );
else if (type == ATTR_RGB4)
return EnumToString( ATTR_RGB4 );
else if (type >= ATTR_FIRSTCOLOR && type <= ATTR_LASTCOLOR4)
return "ATTR_COLOR";
else if (type >= ATTR_FIRSTINT && type <= ATTR_LASTINT)
return "ATTR_INT";
else
return "ATTR_UNKNOW";
}

string AxmlAttrRead(axml_attr &attr) {
local uchar type = attr.value.dateType;
string name = AxmlStringById(attr.name);
string buf = "Unknow";

if (type == ATTR_STRING) {
local string val = AxmlStringById(attr.str);
SPrintf(buf, "%s=%s", name, val);
} else if (type == ATTR_NULL) {
SPrintf(buf, "%s=NULL", name);
} else if (type == ATTR_REFERENCE) {
if (attr.value.data>>24 == 1) {
SPrintf(buf, "%s=@android:%08X", name, attr.value.data);
} else {
SPrintf(buf, "%s=@%08X", name, attr.value.data);
}
} else if (type == ATTR_ATTRIBUTE) {
if (attr.value.data>>24 == 1) {
SPrintf(buf, "%s=?android:%08X", name, attr.value.data);
} else {
SPrintf(buf, "%s=?%08X", name, attr.value.data);
}
} else if (type == ATTR_FLOAT) {
SPrintf(buf, "%s=%g", name, (float)attr.value.data);
} else if (type == ATTR_DIMENSION) {
SPrintf(buf, "%s=%f%s", name,
(float)(attr.value.data & 0xffffff00) * RadixTable[(attr.data >> 4) & 0x03],
DimemsionTable[attr.data & 0x0f] );
} else if (type == ATTR_FRACTION) {
SPrintf(buf, "%s=%f%s", name,
(float)(attr.value.data & 0xffffff00) * RadixTable[(attr.value.data >> 4) & 0x03],
FractionTable[attr.value.data & 0x0f] );
} else if (type == ATTR_HEX) {
SPrintf(buf, "%s=0x%08x", name, attr.value.data);
} else if (type == ATTR_BOOLEAN) {
if (attr.value.data == 0) {
SPrintf(buf, "%s=false", name);
} else {
SPrintf(buf, "%s=true", name);
}
} else if (type >= ATTR_FIRSTCOLOR && type <= ATTR_LASTCOLOR) {
SPrintf(buf, "%s=#%08x", name, attr.value.data);
} else if (type >= ATTR_FIRSTINT && type <= ATTR_LASTINT) {
SPrintf(buf, "%s=%d", name, attr.value.data);
} else {
SPrintf(buf, "%s=UNKNOW", name);
}

return buf;
}

typedef struct {
uint type <format=hex, read=AxmlTypeString, comment="Chunk Type">;
int chunk_size;
int linenumber;
int comment;

if (type == CHUNK_STARTTAG) {
int uri <read=AxmlStringById>;
int name <read=AxmlStringById>;
ushort attr_start;
ushort attr_size;
ushort attr_count;
ushort idIndex;
ushort classIndex;
ushort styleIndex;
if (attr_count > 0) {
axml_attr attrs[attr_count];
}
} else if (type == CHUNK_ENDTAG) {
int url;
int name <read=AxmlStringById>;
} else if (type == CHUNK_STARTNS) {
int prefix <read=AxmlStringById>;
int uri <read=AxmlStringById>;
} else if (type == CHUNK_ENDNS) {
int prefix <read=AxmlStringById>;
int uri <read=AxmlStringById>;
} else if (type == CHUNK_TEXT) {
int text;
int unknow;
}
} axml_node <read=AxmlNodeRead>;

string AxmlNodeRead(axml_node &node) {
string buf = AxmlTypeString(node.type);
if (node.type == CHUNK_STARTNS) {
SPrintf(buf, "<xmlns:%s>", AxmlStringById(node.prefix));
} else if (node.type == CHUNK_ENDNS) {
SPrintf(buf, "</xmlns:%s>", AxmlStringById(node.prefix));
} else if (node.type == CHUNK_STARTTAG) {
SPrintf(buf, "<%s>", AxmlStringById(node.name));
} else if (node.type == CHUNK_ENDTAG) {
SPrintf(buf, "</%s>", AxmlStringById(node.name));
}
return buf;
}

string AxmlTypeString(uint &type) {
if (type == CHUNK_HEAD)
return "TYPE_HEAD";
else if (type == CHUNK_STRING)
return "TYPE_STRINGS";
else if (type == CHUNK_RESOURCE)
return "TYPE_RESOURCES";
else if (type == CHUNK_STARTNS)
return "TYPE_NS_START";
else if (type == CHUNK_ENDNS)
return "TYPE_NS_END";
else if (type == CHUNK_STARTTAG)
return "TYPE_TAG_START";
else if (type == CHUNK_ENDTAG)
return "TYPE_TAG_END";
else if (type == CHUNK_TEXT)
return "TYPE_TEXT";
else
return "TYPE_UNKNOW";
}

struct FILE {
local int off;
local int total;

axml_header header;
axml_strings strings;
axml_resources resources;

total = 0;
do {
total += 1;
// Printf("total=%d\n", total);

axml_node node;
} while (!FEof());

} file;

string AxmlStringById(int &index) {
string ret = "";
if (index >= 0 && index < file.strings.string_count) {
return file.strings.string_offsets[index].astr.data;
} else {
SPrintf(ret, "NULL Out off strings[%d] range %d", file.strings.string_count, index);
return ret;
}
}