Question

在一个项目中，我最近试图通过osx 10.9.5上的libusb访问usb存储设备。但显然一些默认驱动程序声称该设备，我无法访问它。当我尝试通过libusb访问它时，它返回我的权限不足＆＃34;。

当我在Ubuntu中执行（java）应用程序时，一切正常。

我在互联网上的研究表明，提供与更高探针核心上的设备匹配的无代码kext会阻止默认驱动程序声明设备。这将完全解决问题，因为卸载IOUSBMassStorage kext使得可以使用设备执行我们期望的操作。

我创建无代码kext的尝试并没有像我希望的那样成功，因为它似乎既不会在启动时加载，也不会在我使用kextload时加载。至少这就是我想的，因为我无法卸载它，也无法在任何列出的地方找到它。

我的Info.plist的最新版本如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>OSBundleLibraries</key>
    <dict/>
    <key>CFBundleDevelopmentRegion</key>
    <string>English</string>
    <key>CFBundleGetInfoString</key>
    <string>Test USB Stick</string>
    <key>CFBundleIdentifier</key>
    <string>de.mischok.testkext</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>Test USB Device</string>
    <key>CFBundlePackageType</key>
    <string>KEXT</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleVersion</key>
    <string>1.0.0</string>
    <key>IOKitPersonalities</key>
    <dict>
        <key>Device Driver</key>
        <dict>
            <key>CFBundleIdentifier</key>
            <string>de.mischok.testkext</string>
            <key>IOClass</key>
            <string>IOUSBUserClientInit</string>
            <key>IOProviderClass</key>
            <string>IOUSBDevice</string>
            <key>idProduct</key>
            <integer>357</integer>
            <key>idVendor</key>
            <integer>4871</integer>
            <key>bcdDevice</key>
            <integer>4352</integer>
            <key>bConfigurationValue</key>
            <integer>1</integer>
            <key>bInterfaceNumber</key>
            <integer>0</integer>
        </dict>
        <key>Interface Driver</key>
        <dict>
            <key>CFBundleIdentifier</key>
            <string>de.mischok.testkext</string>
            <key>IOClass</key>
            <string>IOUSBUserClientInit</string>
            <key>IOProviderClass</key>
            <string>IOUSBInterface</string>
            <key>idProduct</key>
            <integer>357</integer>
            <key>idVendor</key>
            <integer>4871</integer>
            <key>bcdDevice</key>
            <integer>4352</integer>
            <key>bConfigurationValue</key>
            <integer>1</integer>
            <key>bInterfaceNumber</key>
            <integer>0</integer>
        </dict>
    </dict>
    <key>OSBundleRequired</key>
     <string>Local-Root</string>
</dict>
</plist>

运行sudo kextutil -t -n /path/to/my.kext时会返回这些诊断信息：

Diagnostics for /Users/user/Desktop/testv1-0.kext:
Warnings: 
    Personality CFBundleIdentifier names a kext that doesn't declare an executable: 
        'Interface Driver' -> 'de.mischok.testkext'
        'Device Driver' -> 'de.mischok.testkext'

Code Signing Failure: not code signed
Warnings: 
    Personality CFBundleIdentifier names a kext that doesn't declare an executable: 
        'Interface Driver' -> 'de.mischok.testkext'
        'Device Driver' -> 'de.mischok.testkext'

/Users/user/Desktop/testv1-0.kext appears to be loadable (including linkage for on-disk libraries).

因为它说kext应该是可加载的，我认为它应该可以工作。但是，当使用sudo kextload /path/to/my.kext：

加载kext时，system.log不会正常工作

Nov  5 12:28:58 users-MacBook-Pro.local sudo[528]: user : TTY=ttys000 ; PWD=/Users/user ; USER=root ; COMMAND=/sbin/kextload /Users/user/Desktop/testv1-0.kext
Nov  5 12:28:58 users-MacBook-Pro.local com.apple.kextd[12]: WARNING - Invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext "/Users/user/Desktop/testv1-0.kext"

因为它只是一个警告，我认为它已成功加载。但是一旦我插入设备，usb探测器输出就像这样：

Nov  5 12:57:11.911  [6]    Device Descriptor Dump
Nov  5 12:57:11.911  [6]        bLength 18
Nov  5 12:57:11.911  [6]        bDescriptorType 1
Nov  5 12:57:11.911  [6]        bcdUSB 768 (0x0300)
Nov  5 12:57:11.911  [6]        bDeviceClass 0
Nov  5 12:57:11.911  [6]        bDeviceSubClass 0
Nov  5 12:57:11.911  [6]        bDeviceProtocol 0
Nov  5 12:57:11.911  [6]        bMaxPacketSize0 9
Nov  5 12:57:11.911  [6]        idVendor 4871 (0x1307)
Nov  5 12:57:11.911  [6]        idProduct 357 (0x0165)
Nov  5 12:57:11.911  [6]        bcdDevice 4352 (0x1100)
Nov  5 12:57:11.911  [6]        iManufacturer 1 
Nov  5 12:57:11.911  [6]        iProduct 2 
Nov  5 12:57:11.911  [6]        iSerialNumber 3
Nov  5 12:57:11.911  [6]        bNumConfigurations 1
Nov  5 12:57:11.916  [5]    Finding device driver for DEVICE, matching personality using com.apple.iokit.IOUSBUserClient, score: 106999, wildCard = 3
Nov  5 12:57:11.916  [6]        Matched: idVendor (4871) idProduct (357) bcdDevice (4352) 
Nov  5 12:57:11.916  [6]        Didn't Match: nothing
Nov  5 12:57:11.917  [5]    Finding device driver for DEVICE, matching personality using com.apple.driver.AppleUSBComposite, score: 50000, wildCard = 0
Nov  5 12:57:11.917  [6]        Matched: bDeviceClass (0) bDeviceSubClass (0) 
Nov  5 12:57:11.917  [6]        Didn't Match: nothing
Nov  5 12:57:11.918  [5]    Finding device driver for DEVICE, matching personality using com.apple.driver.AppleUSBCDC, score: 60000, wildCard = 0
Nov  5 12:57:11.918  [6]        Matched: bDeviceClass (0) bDeviceSubClass (0) bDeviceProtocol (0) 
Nov  5 12:57:11.918  [6]        Didn't Match: nothing

这是唯一发生的人格匹配，所以我想知道，我应该做什么，以便我的kext与我的设备匹配甚至加载？

Answer 1

使用kextutil，而不是kextload。它提供了更好的诊断功能。
指定IOClass IOUSBUserClientInit的I / O Kit个性必须指定CFBundleIdentifier com.apple.iokit.IOUSBUserClient因为该类所在的位置。
要加载未签名的kext，它必须位于{9}上的/System/Library/Extensions。

USB存储设备的无代码kext

1 个答案: