671 lines
18 KiB
JavaScript
671 lines
18 KiB
JavaScript
'use strict';
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// From https://github.com/openstf/adbkit-apkreader
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const NodeType = {
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ELEMENT_NODE: 1,
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ATTRIBUTE_NODE: 2,
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CDATA_SECTION_NODE: 4
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};
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const ChunkType = {
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NULL: 0x0000,
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STRING_POOL: 0x0001,
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TABLE: 0x0002,
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XML: 0x0003,
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XML_FIRST_CHUNK: 0x0100,
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XML_START_NAMESPACE: 0x0100,
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XML_END_NAMESPACE: 0x0101,
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XML_START_ELEMENT: 0x0102,
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XML_END_ELEMENT: 0x0103,
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XML_CDATA: 0x0104,
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XML_LAST_CHUNK: 0x017f,
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XML_RESOURCE_MAP: 0x0180,
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TABLE_PACKAGE: 0x0200,
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TABLE_TYPE: 0x0201,
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TABLE_TYPE_SPEC: 0x0202
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};
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const StringFlags = {
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SORTED: 1 << 0,
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UTF8: 1 << 8
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// Taken from android.util.TypedValue
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};const TypedValue = {
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COMPLEX_MANTISSA_MASK: 0x00ffffff,
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COMPLEX_MANTISSA_SHIFT: 0x00000008,
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COMPLEX_RADIX_0p23: 0x00000003,
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COMPLEX_RADIX_16p7: 0x00000001,
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COMPLEX_RADIX_23p0: 0x00000000,
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COMPLEX_RADIX_8p15: 0x00000002,
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COMPLEX_RADIX_MASK: 0x00000003,
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COMPLEX_RADIX_SHIFT: 0x00000004,
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COMPLEX_UNIT_DIP: 0x00000001,
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COMPLEX_UNIT_FRACTION: 0x00000000,
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COMPLEX_UNIT_FRACTION_PARENT: 0x00000001,
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COMPLEX_UNIT_IN: 0x00000004,
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COMPLEX_UNIT_MASK: 0x0000000f,
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COMPLEX_UNIT_MM: 0x00000005,
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COMPLEX_UNIT_PT: 0x00000003,
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COMPLEX_UNIT_PX: 0x00000000,
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COMPLEX_UNIT_SHIFT: 0x00000000,
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COMPLEX_UNIT_SP: 0x00000002,
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DENSITY_DEFAULT: 0x00000000,
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DENSITY_NONE: 0x0000ffff,
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TYPE_ATTRIBUTE: 0x00000002,
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TYPE_DIMENSION: 0x00000005,
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TYPE_FIRST_COLOR_INT: 0x0000001c,
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TYPE_FIRST_INT: 0x00000010,
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TYPE_FLOAT: 0x00000004,
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TYPE_FRACTION: 0x00000006,
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TYPE_INT_BOOLEAN: 0x00000012,
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TYPE_INT_COLOR_ARGB4: 0x0000001e,
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TYPE_INT_COLOR_ARGB8: 0x0000001c,
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TYPE_INT_COLOR_RGB4: 0x0000001f,
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TYPE_INT_COLOR_RGB8: 0x0000001d,
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TYPE_INT_DEC: 0x00000010,
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TYPE_INT_HEX: 0x00000011,
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TYPE_LAST_COLOR_INT: 0x0000001f,
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TYPE_LAST_INT: 0x0000001f,
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TYPE_NULL: 0x00000000,
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TYPE_REFERENCE: 0x00000001,
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TYPE_STRING: 0x00000003
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};
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class BinaryXmlParser {
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constructor(buffer, options = {}) {
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this.buffer = buffer;
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this.cursor = 0;
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this.strings = [];
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this.resources = [];
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this.document = null;
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this.parent = null;
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this.stack = [];
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this.debug = options.debug || false;
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}
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readU8() {
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this.debug && console.group('readU8');
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this.debug && console.debug('cursor:', this.cursor);
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const val = this.buffer[this.cursor];
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this.debug && console.debug('value:', val);
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this.cursor += 1;
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this.debug && console.groupEnd();
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return val;
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}
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readU16() {
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this.debug && console.group('readU16');
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this.debug && console.debug('cursor:', this.cursor);
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const val = this.buffer.readUInt16LE(this.cursor);
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this.debug && console.debug('value:', val);
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this.cursor += 2;
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this.debug && console.groupEnd();
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return val;
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}
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readS32() {
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this.debug && console.group('readS32');
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this.debug && console.debug('cursor:', this.cursor);
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const val = this.buffer.readInt32LE(this.cursor);
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this.debug && console.debug('value:', val);
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this.cursor += 4;
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this.debug && console.groupEnd();
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return val;
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}
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readU32() {
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this.debug && console.group('readU32');
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this.debug && console.debug('cursor:', this.cursor);
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const val = this.buffer.readUInt32LE(this.cursor);
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this.debug && console.debug('value:', val);
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this.cursor += 4;
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this.debug && console.groupEnd();
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return val;
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}
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readLength8() {
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this.debug && console.group('readLength8');
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let len = this.readU8();
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if (len & 0x80) {
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len = (len & 0x7f) << 8;
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len += this.readU8();
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}
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this.debug && console.debug('length:', len);
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this.debug && console.groupEnd();
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return len;
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}
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readLength16() {
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this.debug && console.group('readLength16');
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let len = this.readU16();
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if (len & 0x8000) {
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len = (len & 0x7fff) << 16;
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len += this.readU16();
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}
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this.debug && console.debug('length:', len);
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this.debug && console.groupEnd();
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return len;
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}
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readDimension() {
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this.debug && console.group('readDimension');
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const dimension = {
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value: null,
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unit: null,
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rawUnit: null
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};
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const value = this.readU32();
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const unit = dimension.value & 0xff;
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dimension.value = value >> 8;
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dimension.rawUnit = unit;
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switch (unit) {
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case TypedValue.COMPLEX_UNIT_MM:
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dimension.unit = 'mm';
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break;
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case TypedValue.COMPLEX_UNIT_PX:
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dimension.unit = 'px';
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break;
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case TypedValue.COMPLEX_UNIT_DIP:
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dimension.unit = 'dp';
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break;
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case TypedValue.COMPLEX_UNIT_SP:
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dimension.unit = 'sp';
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break;
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case TypedValue.COMPLEX_UNIT_PT:
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dimension.unit = 'pt';
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break;
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case TypedValue.COMPLEX_UNIT_IN:
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dimension.unit = 'in';
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break;
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}
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this.debug && console.groupEnd();
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return dimension;
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}
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readFraction() {
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this.debug && console.group('readFraction');
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const fraction = {
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value: null,
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type: null,
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rawType: null
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};
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const value = this.readU32();
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const type = value & 0xf;
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fraction.value = this.convertIntToFloat(value >> 4);
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fraction.rawType = type;
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switch (type) {
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case TypedValue.COMPLEX_UNIT_FRACTION:
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fraction.type = '%';
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break;
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case TypedValue.COMPLEX_UNIT_FRACTION_PARENT:
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fraction.type = '%p';
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break;
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}
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this.debug && console.groupEnd();
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return fraction;
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}
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readHex24() {
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this.debug && console.group('readHex24');
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var val = (this.readU32() & 0xffffff).toString(16);
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this.debug && console.groupEnd();
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return val;
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}
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readHex32() {
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this.debug && console.group('readHex32');
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var val = this.readU32().toString(16);
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this.debug && console.groupEnd();
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return val;
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}
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readTypedValue() {
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this.debug && console.group('readTypedValue');
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const typedValue = {
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value: null,
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type: null,
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rawType: null
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};
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const start = this.cursor;
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let size = this.readU16();
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/* const zero = */this.readU8();
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const dataType = this.readU8();
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// Yes, there has been a real world APK where the size is malformed.
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if (size === 0) {
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size = 8;
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}
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typedValue.rawType = dataType;
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switch (dataType) {
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case TypedValue.TYPE_INT_DEC:
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typedValue.value = this.readS32();
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typedValue.type = 'int_dec';
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break;
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case TypedValue.TYPE_INT_HEX:
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typedValue.value = this.readS32();
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typedValue.type = 'int_hex';
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break;
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case TypedValue.TYPE_STRING:
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var ref = this.readS32();
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typedValue.value = ref > 0 ? this.strings[ref] : '';
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typedValue.type = 'string';
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break;
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case TypedValue.TYPE_REFERENCE:
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var id = this.readU32();
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typedValue.value = `resourceId:0x${id.toString(16)}`;
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typedValue.type = 'reference';
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break;
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case TypedValue.TYPE_INT_BOOLEAN:
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typedValue.value = this.readS32() !== 0;
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typedValue.type = 'boolean';
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break;
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case TypedValue.TYPE_NULL:
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this.readU32();
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typedValue.value = null;
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typedValue.type = 'null';
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break;
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case TypedValue.TYPE_INT_COLOR_RGB8:
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typedValue.value = this.readHex24();
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typedValue.type = 'rgb8';
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break;
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case TypedValue.TYPE_INT_COLOR_RGB4:
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typedValue.value = this.readHex24();
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typedValue.type = 'rgb4';
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break;
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case TypedValue.TYPE_INT_COLOR_ARGB8:
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typedValue.value = this.readHex32();
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typedValue.type = 'argb8';
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break;
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case TypedValue.TYPE_INT_COLOR_ARGB4:
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typedValue.value = this.readHex32();
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typedValue.type = 'argb4';
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break;
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case TypedValue.TYPE_DIMENSION:
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typedValue.value = this.readDimension();
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typedValue.type = 'dimension';
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break;
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case TypedValue.TYPE_FRACTION:
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typedValue.value = this.readFraction();
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typedValue.type = 'fraction';
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break;
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default:
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{
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const type = dataType.toString(16);
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console.debug(`Not sure what to do with typed value of type 0x${type}, falling back to reading an uint32.`);
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typedValue.value = this.readU32();
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typedValue.type = 'unknown';
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}
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}
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// Ensure we consume the whole value
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const end = start + size;
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if (this.cursor !== end) {
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const type = dataType.toString(16);
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const diff = end - this.cursor;
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console.debug(`Cursor is off by ${diff} bytes at ${this.cursor} at supposed end \
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of typed value of type 0x${type}. The typed value started at offset ${start} \
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and is supposed to end at offset ${end}. Ignoring the rest of the value.`);
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this.cursor = end;
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}
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this.debug && console.groupEnd();
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return typedValue;
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}
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// https://twitter.com/kawasima/status/427730289201139712
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convertIntToFloat(int) {
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const buf = new ArrayBuffer(4);new Int32Array(buf)[0] = int;
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return new Float32Array(buf)[0];
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}
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readString(encoding) {
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this.debug && console.group('readString', encoding);
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switch (encoding) {
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case 'utf-8':
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var stringLength = this.readLength8(encoding);
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this.debug && console.debug('stringLength:', stringLength);
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var byteLength = this.readLength8(encoding);
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this.debug && console.debug('byteLength:', byteLength);
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var value = this.buffer.toString(encoding, this.cursor, this.cursor += byteLength);
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this.debug && console.debug('value:', value);
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this.debug && console.groupEnd();
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return value;
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case 'ucs2':
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stringLength = this.readLength16(encoding);
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this.debug && console.debug('stringLength:', stringLength);
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byteLength = stringLength * 2;
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this.debug && console.debug('byteLength:', byteLength);
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value = this.buffer.toString(encoding, this.cursor, this.cursor += byteLength);
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this.debug && console.debug('value:', value);
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this.debug && console.groupEnd();
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return value;
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default:
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throw new Error(`Unsupported encoding '${encoding}'`);
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}
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}
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readChunkHeader() {
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this.debug && console.group('readChunkHeader');
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var header = {
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startOffset: this.cursor,
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chunkType: this.readU16(),
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headerSize: this.readU16(),
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chunkSize: this.readU32()
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};
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this.debug && console.debug('startOffset:', header.startOffset);
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this.debug && console.debug('chunkType:', header.chunkType);
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this.debug && console.debug('headerSize:', header.headerSize);
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this.debug && console.debug('chunkSize:', header.chunkSize);
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this.debug && console.groupEnd();
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return header;
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}
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readStringPool(header) {
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this.debug && console.group('readStringPool');
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header.stringCount = this.readU32();
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this.debug && console.debug('stringCount:', header.stringCount);
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header.styleCount = this.readU32();
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this.debug && console.debug('styleCount:', header.styleCount);
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header.flags = this.readU32();
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this.debug && console.debug('flags:', header.flags);
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header.stringsStart = this.readU32();
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this.debug && console.debug('stringsStart:', header.stringsStart);
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header.stylesStart = this.readU32();
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this.debug && console.debug('stylesStart:', header.stylesStart);
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if (header.chunkType !== ChunkType.STRING_POOL) {
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throw new Error('Invalid string pool header');
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}
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const offsets = [];
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for (let i = 0, l = header.stringCount; i < l; ++i) {
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this.debug && console.debug('offset:', i);
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offsets.push(this.readU32());
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}
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const sorted = (header.flags & StringFlags.SORTED) === StringFlags.SORTED;
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this.debug && console.debug('sorted:', sorted);
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const encoding = (header.flags & StringFlags.UTF8) === StringFlags.UTF8 ? 'utf-8' : 'ucs2';
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this.debug && console.debug('encoding:', encoding);
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const stringsStart = header.startOffset + header.stringsStart;
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this.cursor = stringsStart;
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for (let i = 0, l = header.stringCount; i < l; ++i) {
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this.debug && console.debug('string:', i);
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this.debug && console.debug('offset:', offsets[i]);
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this.cursor = stringsStart + offsets[i];
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this.strings.push(this.readString(encoding));
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}
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// Skip styles
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this.cursor = header.startOffset + header.chunkSize;
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this.debug && console.groupEnd();
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return null;
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}
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readResourceMap(header) {
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this.debug && console.group('readResourceMap');
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const count = Math.floor((header.chunkSize - header.headerSize) / 4);
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for (let i = 0; i < count; ++i) {
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this.resources.push(this.readU32());
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}
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this.debug && console.groupEnd();
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return null;
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}
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readXmlNamespaceStart() /* header */{
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this.debug && console.group('readXmlNamespaceStart');
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/* const line = */this.readU32();
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/* const commentRef = */this.readU32();
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/* const prefixRef = */this.readS32();
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/* const uriRef = */this.readS32();
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// We don't currently care about the values, but they could
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// be accessed like so:
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//
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// namespaceURI.prefix = this.strings[prefixRef] // if prefixRef > 0
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// namespaceURI.uri = this.strings[uriRef] // if uriRef > 0
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this.debug && console.groupEnd();
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return null;
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}
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readXmlNamespaceEnd() /* header */{
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this.debug && console.group('readXmlNamespaceEnd');
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/* const line = */this.readU32();
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/* const commentRef = */this.readU32();
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/* const prefixRef = */this.readS32();
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/* const uriRef = */this.readS32();
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// We don't currently care about the values, but they could
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// be accessed like so:
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//
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// namespaceURI.prefix = this.strings[prefixRef] // if prefixRef > 0
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// namespaceURI.uri = this.strings[uriRef] // if uriRef > 0
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this.debug && console.groupEnd();
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return null;
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}
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readXmlElementStart() /* header */{
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this.debug && console.group('readXmlElementStart');
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const node = {
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namespaceURI: null,
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nodeType: NodeType.ELEMENT_NODE,
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nodeName: null,
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attributes: [],
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childNodes: []
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/* const line = */ };this.readU32();
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/* const commentRef = */this.readU32();
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const nsRef = this.readS32();
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const nameRef = this.readS32();
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if (nsRef > 0) {
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node.namespaceURI = this.strings[nsRef];
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}
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node.nodeName = this.strings[nameRef];
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/* const attrStart = */this.readU16();
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/* const attrSize = */this.readU16();
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const attrCount = this.readU16();
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/* const idIndex = */this.readU16();
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/* const classIndex = */this.readU16();
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/* const styleIndex = */this.readU16();
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for (let i = 0; i < attrCount; ++i) {
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node.attributes.push(this.readXmlAttribute());
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}
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if (this.document) {
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this.parent.childNodes.push(node);
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this.parent = node;
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} else {
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this.document = this.parent = node;
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}
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this.stack.push(node);
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this.debug && console.groupEnd();
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return node;
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}
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readXmlAttribute() {
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this.debug && console.group('readXmlAttribute');
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const attr = {
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namespaceURI: null,
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nodeType: NodeType.ATTRIBUTE_NODE,
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nodeName: null,
|
|
name: null,
|
|
value: null,
|
|
typedValue: null
|
|
};
|
|
|
|
const nsRef = this.readS32();
|
|
const nameRef = this.readS32();
|
|
const valueRef = this.readS32();
|
|
|
|
if (nsRef > 0) {
|
|
attr.namespaceURI = this.strings[nsRef];
|
|
}
|
|
|
|
attr.nodeName = attr.name = this.strings[nameRef];
|
|
|
|
if (valueRef > 0) {
|
|
// some apk have versionName with special characters
|
|
if (attr.name === 'versionName') {
|
|
// only keep printable characters
|
|
// https://www.ascii-code.com/characters/printable-characters
|
|
this.strings[valueRef] = this.strings[valueRef].replace(/[^\x21-\x7E]/g, '');
|
|
}
|
|
attr.value = this.strings[valueRef];
|
|
}
|
|
|
|
attr.typedValue = this.readTypedValue();
|
|
|
|
this.debug && console.groupEnd();
|
|
|
|
return attr;
|
|
}
|
|
|
|
readXmlElementEnd() /* header */{
|
|
this.debug && console.group('readXmlCData');
|
|
|
|
/* const line = */this.readU32();
|
|
/* const commentRef = */this.readU32();
|
|
/* const nsRef = */this.readS32();
|
|
/* const nameRef = */this.readS32();
|
|
|
|
this.stack.pop();
|
|
this.parent = this.stack[this.stack.length - 1];
|
|
|
|
this.debug && console.groupEnd();
|
|
|
|
return null;
|
|
}
|
|
|
|
readXmlCData() /* header */{
|
|
this.debug && console.group('readXmlCData');
|
|
|
|
const cdata = {
|
|
namespaceURI: null,
|
|
nodeType: NodeType.CDATA_SECTION_NODE,
|
|
nodeName: '#cdata',
|
|
data: null,
|
|
typedValue: null
|
|
|
|
/* const line = */ };this.readU32();
|
|
/* const commentRef = */this.readU32();
|
|
const dataRef = this.readS32();
|
|
|
|
if (dataRef > 0) {
|
|
cdata.data = this.strings[dataRef];
|
|
}
|
|
|
|
cdata.typedValue = this.readTypedValue();
|
|
|
|
this.parent.childNodes.push(cdata);
|
|
|
|
this.debug && console.groupEnd();
|
|
|
|
return cdata;
|
|
}
|
|
|
|
readNull(header) {
|
|
this.debug && console.group('readNull');
|
|
this.cursor += header.chunkSize - header.headerSize;
|
|
this.debug && console.groupEnd();
|
|
return null;
|
|
}
|
|
|
|
parse() {
|
|
this.debug && console.group('BinaryXmlParser.parse');
|
|
|
|
const xmlHeader = this.readChunkHeader();
|
|
if (xmlHeader.chunkType !== ChunkType.XML) {
|
|
throw new Error('Invalid XML header');
|
|
}
|
|
|
|
while (this.cursor < this.buffer.length) {
|
|
this.debug && console.group('chunk');
|
|
const start = this.cursor;
|
|
const header = this.readChunkHeader();
|
|
switch (header.chunkType) {
|
|
case ChunkType.STRING_POOL:
|
|
this.readStringPool(header);
|
|
break;
|
|
case ChunkType.XML_RESOURCE_MAP:
|
|
this.readResourceMap(header);
|
|
break;
|
|
case ChunkType.XML_START_NAMESPACE:
|
|
this.readXmlNamespaceStart(header);
|
|
break;
|
|
case ChunkType.XML_END_NAMESPACE:
|
|
this.readXmlNamespaceEnd(header);
|
|
break;
|
|
case ChunkType.XML_START_ELEMENT:
|
|
this.readXmlElementStart(header);
|
|
break;
|
|
case ChunkType.XML_END_ELEMENT:
|
|
this.readXmlElementEnd(header);
|
|
break;
|
|
case ChunkType.XML_CDATA:
|
|
this.readXmlCData(header);
|
|
break;
|
|
case ChunkType.NULL:
|
|
this.readNull(header);
|
|
break;
|
|
default:
|
|
throw new Error(`Unsupported chunk type '${header.chunkType}'`);
|
|
}
|
|
|
|
// Ensure we consume the whole chunk
|
|
const end = start + header.chunkSize;
|
|
if (this.cursor !== end) {
|
|
const diff = end - this.cursor;
|
|
const type = header.chunkType.toString(16);
|
|
console.debug(`Cursor is off by ${diff} bytes at ${this.cursor} at supposed \
|
|
end of chunk of type 0x${type}. The chunk started at offset ${start} and is \
|
|
supposed to end at offset ${end}. Ignoring the rest of the chunk.`);
|
|
this.cursor = end;
|
|
}
|
|
|
|
this.debug && console.groupEnd();
|
|
}
|
|
|
|
this.debug && console.groupEnd();
|
|
|
|
return this.document;
|
|
}
|
|
}
|
|
|
|
module.exports = BinaryXmlParser; |