python解析苹果identification信息

发表于 2023-10-19 | 分类于 tutorial

from construct import *

def MessagesSentByAccessory(data):
    d = GreedyRange(Int16ub)
    pkt = d.parse(data)
    for i in pkt:
        print('%04x' % i)
    
idmap = {
    0x0000: {
        'name': 'Name',
        'handler': None
    },
    0x0001: {
        'name': 'ModelIdentifier',
        'handler': None
    },
    0x0002: {
        'name': 'Manufacturer',
        'handler': None
    },
    0x0003: {
        'name': 'SerialNumber',
        'handler': None
    },
    0x0004: {
        'name': 'FirmwareVersion',
        'handler': None
    },
    0x0005: {
        'name': 'HardwareVersion',
        'handler': None
    },
    0x0006: {
        'name': 'MessagesSentByAccessory',
        'handler': MessagesSentByAccessory
    },
    0x0007: {
        'name': 'MessagesReceivedFromDevice',
        'handler': None
    },
    0x0008: {
        'name': 'PowerProvidingCapability',
        'handler': None
    },
    0x0009: {
        'name': 'MaximumCurrentDrawnFromDevice',
        'handler': None
    },
    0x000a: {
        'name': 'SupportedExternalAccessoryProtocol',
        'handler': None
    },
    0x000b: {
        'name': 'AppMatchTeamID',
        'handler': None
    },
    0x000c: {
        'name': 'CurrentLanguage',
        'handler': None
    },
    0x000d: {
        'name': 'SupportedLanguage',
        'handler': None
    },
    0x000e: {
        'name': 'UARTTransportComponent',
        'handler': None
    },
    0x000f: {
        'name': 'USBDeviceTransportComponent',
        'handler': None
    },
    0x0010: {
        'name': 'USBHostTransportComponent',
        'handler': None
    },
    0x0011: {
        'name': 'BluetoothTransportComponent',
        'handler': None
    },
    0x0012: {
        'name': 'iAP2HIDComponent',
        'handler': None
    },
    0x0016: {
        'name': 'LocationInformationComponent',
        'handler': None
    },
    0x0017: {
        'name': 'USBHostHIDComponent',
        'handler': None
    },
    0x001d: {
        'name': 'BluetoothHIDComponent',
        'handler': None
    },
    0x0022: {
        'name': 'ProductPlanUID',
        'handler': None
    },
    0x0014: {
        'name': 'VehicleInformationComponent',
        'handler': None
    },
}

data = bytes([
0x40, 0x40, 0x01, 0xA5, 0x1D, 0x01, 0x00, 0x0F, 0x00, 0x00, 0x56, 0x6F, 0x6C, 0x6B, 0x73, 0x77, 0x61, 0x67, 0x65, 0x6E, 0x00, 0x00, 0x0F, 0x00, 0x01, 0x31, 0x37, 0x47, 0x30, 0x33, 0x35, 0x32, 0x38, 0x30, 0x20, 0x00, 0x00, 0x18, 0x00, 0x02, 0x44, 0x65, 0x73, 0x61, 0x79, 0x20, 0x53, 0x56, 0x20, 0x41, 0x75, 0x74, 0x6F, 0x6D, 0x6F, 0x74, 0x69, 0x76, 0x65, 0x00, 0x00, 0x13, 0x00, 0x03, 0x56, 0x57, 0x5A, 0x36, 0x5A, 0x32, 0x53, 0x30, 0x30, 0x32, 0x38, 0x34, 0x38, 0x30, 0x00, 0x00, 0x09, 0x00, 0x04, 0x30, 0x33, 0x39, 0x31, 0x00, 0x00, 0x0B, 0x00, 0x05, 0x33, 0x36, 0x2E, 0x30, 0x2E, 0x30, 0x00, 0x00, 0x16, 0x00, 0x06, 0xAE, 0x00, 0xAE, 0x02, 0xAE, 0x03, 0xFF, 0xFB, 0x41, 0x54, 0x41, 0x56, 0x41, 0x57, 0x41, 0x59, 0xEA, 0x02, 0x00, 0x12, 0x00, 0x07, 0xAE, 0x01, 0xFF, 0xFA, 0xFF, 0xFC, 0x41, 0x55, 0x41, 0x58, 0xEA, 0x00, 0xEA, 0x01, 0x00, 0x05, 0x00, 0x08, 0x02, 0x00, 0x06, 0x00, 0x09, 0x00, 0x00, 0x00, 0x36, 0x00, 0x0A, 0x00, 0x05, 0x00, 0x00, 0x0D, 0x00, 0x28, 0x00, 0x01, 0x63, 0x6F, 0x6D, 0x2E, 0x76, 0x77, 0x61, 0x67, 0x2E, 0x69, 0x6E, 0x66, 0x6F, 0x74, 0x61, 0x69, 0x6E, 0x6D, 0x65, 0x6E, 0x74, 0x2E, 0x63, 0x61, 0x72, 0x70, 0x6C, 0x61, 0x79, 0x2E, 0x65, 0x78, 0x6C, 0x61, 0x70, 0x00, 0x00, 0x05, 0x00, 0x02, 0x01, 0x00, 0x1F, 0x00, 0x0A, 0x00, 0x05, 0x00, 0x00, 0x0E, 0x00, 0x11, 0x00, 0x01, 0x63, 0x6F, 0x6D, 0x2E, 0x61, 0x70, 0x70, 0x6C, 0x65, 0x2E, 0x70, 0x31, 0x00, 0x00, 0x05, 0x00, 0x02, 0x01, 0x00, 0x1F, 0x00, 0x0A, 0x00, 0x05, 0x00, 0x00, 0x0F, 0x00, 0x11, 0x00, 0x01, 0x63, 0x6F, 0x6D, 0x2E, 0x61, 0x70, 0x70, 0x6C, 0x65, 0x2E, 0x70, 0x32, 0x00, 0x00, 0x05, 0x00, 0x02, 0x01, 0x00, 0x07, 0x00, 0x0C, 0x65, 0x6E, 0x00, 0x00, 0x07, 0x00, 0x0D, 0x65, 0x6E, 0x00, 0x00, 0x0A, 0x00, 0x0D, 0x7A, 0x68, 0x5F, 0x43, 0x4E, 0x00, 0x00, 0x2E, 0x00, 0x10, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x1B, 0x00, 0x01, 0x54, 0x72, 0x61, 0x6E, 0x73, 0x70, 0x6F, 0x72, 0x74, 0x43, 0x6F, 0x6D, 0x70, 0x6F, 0x6E, 0x65, 0x6E, 0x74, 0x4E, 0x61, 0x6D, 0x65, 0x00, 0x00, 0x04, 0x00, 0x02, 0x00, 0x05, 0x00, 0x03, 0x01, 0x00, 0x32, 0x00, 0x14, 0x00, 0x06, 0x00, 0x00, 0x00, 0x2A, 0x00, 0x14, 0x00, 0x01, 0x56, 0x45, 0x48, 0x49, 0x43, 0x4C, 0x45, 0x49, 0x4E, 0x46, 0x4F, 0x43, 0x4F, 0x4D, 0x50, 0x00, 0x00, 0x05, 0x00, 0x02, 0x00, 0x00, 0x0F, 0x00, 0x06, 0x56, 0x6F, 0x6C, 0x6B, 0x73, 0x77, 0x61, 0x67, 0x65, 0x6E, 0x00, 0x00, 0x23, 0x00, 0x16, 0x00, 0x06, 0x00, 0x00, 0x00, 0x29, 0x00, 0x15, 0x00, 0x01, 0x4C, 0x4F, 0x43, 0x41, 0x54, 0x49, 0x4F, 0x4E, 0x49, 0x4E, 0x46, 0x4F, 0x43, 0x4F, 0x4D, 0x50, 0x00, 0x00, 0x04, 0x00, 0x14])

#data = bytes.fromhex('404000E31D01000E000051756269692050726F00000C00014D4B5051532D5700001000024D616B74617220496E632E00001500034230373033323130323036413030433500000A0004312E302E3300000A0005312E302E3100000A0006AE00AE02AE0300060007AE010005000802000600090000002C000A000500000000180001636F6D2E6D616B7461722E717562696970726F000005000201000600030000000F000B4E4C354837544B475645000007000C656E000007000D656E0000260010000600000000001800014C696768746E696E6720436F6E6E6563746F72000004000268')
#data = bytes.fromhex('404000E21D02000E0000636F6F6C6275696C6400000E0001636F6F6C6275696C6400000E0002636F6F6C6275696C6400000E0003636F6F6C6275696C640000120004636F6F6C6275696C642D312E300000080005312E3000000A0006AE00AE02AE0300060007AE0100050008020006000900000007000C656E000007000D656E00002C000A000500000000180001636F6D2E6D616B7461722E717562696970726F000005000201000600030000000F000B4E4C354837544B4756450000260010000600000000001800014C696768746E696E6720436F6E6E6563746F720000040002BE')

format = Struct(
    "magic" / Bytes(2),
    "length" / Int16ub,
    "id" / Int16ub,
    "data" / Bytes(this.length - 6)
)

pkt = format.parse(data)
data = pkt.data

while True:
    if len(data) <= 0:
        break
    format = Struct(
        "length" / Int16ub,
        "id" / Int16ub,
        "data" / Bytes(this.length - 4)
    )
    pkt = format.parse(data)
    data = data[pkt.length:]
    if pkt.id in idmap:
        print('======%s======' % idmap[pkt.id]['name'])
        print(pkt.data)
        handler = idmap[pkt.id]['handler']
        if handler != None:
            handler(pkt.data)
        
    else:
        print('=====> %d' % pkt.id)

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beagle 480 抓包数据转成pcap文件

发表于 2023-08-27 | 分类于 tutorial

使用beagle 480抓到的usb ncm数据直接分析比较困难，这里将beagle 480抓到的包导出成csv文件(注意要勾选data数据栏) 下面脚本将每包ncm数据，去掉nth16头和ndp头，然后将同一包ncm数据里的所有ndp entry 提取出来，合并到一起，然后形成一个以太帧最后将所有以太帧一起写到pcap文件，再用wireshark打开

import re
from construct import *
from csv import reader
import scapy.all as scapy

def ncm_extract_payload(data):
    payload = bytearray()
    nth_format = Struct(
        "magic" / Bytes(4),
        "header_length" / Int16ul,
        "seq" / Int16ul,
        "block_length" / Int16ul,
        "fp_index" / Int16ul,
    )
    
    ndp_format = Struct(
        "magic" / Bytes(4),
        "length" / Int16ul,
        "next_ndp_index" / Int16ul
    )
    
    entry_format = Struct(
        "index" / Int16ul,
        "length" / Int16ul
    )
    
    nth16 = nth_format.parse(data)
    offset = nth16.fp_index
    if len(data) == 116:
        print('====> %d' % offset)
    
    while True:
        ndp16 = ndp_format.parse(data[offset:])
        num_entries = int((ndp16.length - 8) / 4)
        offset += 8
        for i in range(0, num_entries):
            entry = entry_format.parse(data[offset:])
            offset += 4
            if entry.length > 0 and entry.index > 0:
                payload += data[entry.index: entry.index + entry.length]
        
        offset = ndp16.next_ndp_index
        if offset == 0:
            break
    
    print('%d %d %d' % (len(data), len(payload), num_entries))
    return payload
    
    
def parse_ts(str):
    m = re.match(r'(\d+):(\d+)\.(\d+)\.(\d+)', str)
    if m == None:
        return 0
    
    groups = m.groups()
    if len(groups) != 4:
        return 0
    
    return round(float(groups[0]) * 60 + float(groups[1]) + \
        float(groups[2]) / 1000.0 + float(groups[3]) / 1000000.0, 6)
        
packets = []

count = 0
with open('out.csv', 'r') as fp:
    csvr = reader(fp)
    for row in csvr:
        if row[0][0] == '#':
            continue
        err = row[6]
        if err != '':
            continue
        dev = row[7]
        if dev != '02':
            continue
            
        ep = row[8]
        if ep == '02' or ep == '02':
            data = row[10]
            ts = parse_ts(row[3])
            data = bytes.fromhex(data.strip())
            if len(data) == 0:
                continue
            payload = ncm_extract_payload(data)
            packets.append(scapy.Ether(payload))
            #count += 1
            #if count == 10:
            #    break

scapy.wrpcap("output.pcap", packets)

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addr2line解析栈回溯信息

发表于 2023-08-26 | 分类于 tutorial

android下

prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-addr2line -C -f -e out/target/product/<xxxx>
/obj/EXECUTABLES/<yyyy>_intermediates/LINKED/<yyyy> <函数地址>

buildroot下需要编译的时候保留非strip版本

buildroot/prebuilts/uclibc-6.5.0/bin/arm-buildroot-linux-uclibcgnueabihf-addr2line -C -f -e output/build/<yyyy>/<yyyy>.nostrip <函数地址>

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格式化分区

发表于 2023-08-24 | 分类于 tutorial

mkfs_jffs2() {                                                                                                                   
        local erase_block=$(/bin/cat /proc/mtd | /bin/grep "$(basename /dev/by-name/rootfs_data)" | /usr/bin/awk '{print $3}')    
        /bin/mkdir -p /tmp/jffs2.dir/tmp        
        mkfs.jffs2 -p -e 0x${erase_block} -d /tmp/jffs2.dir \
                -o /tmp/jffs2.img >/dev/null || return 1     
        /bin/dd if=/tmp/jffs2.img of=/dev/by-name/rootfs_data || return 1          
        /bin/rm -rf /tmp/jffs2.img /tmp/jffs2.dir                                                
}

mkfs_jffs2

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apk打包签名脚本

发表于 2023-08-18 | 分类于 tutorial

将apk解压到test文件夹, 替换apk内的so之后快速打包apk用。

rm -f test.apk
(cd test && zip -0 -D -r ../test.apk . *)
java -jar signapk.jar testkey.x509.pem testkey.pk8 test.apk out.apk

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Next Theme Tutorial

发表于 2017-07-20 | 分类于 tutorial

NexT is a high quality elegant Jekyll theme ported from Hexo Next. It is crafted from scratch, with love.

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