├── ApkSig ├── ApkSig.class └── ApkSig.java ├── LICENSE.md ├── README.md ├── patch.py ├── smali └── fillinsig.smali └── tools ├── baksmali.jar └── smali.jar /ApkSig/ApkSig.class: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/souramoo/Needle/f59253277fea6760ed8451597923a01cf944e3b3/ApkSig/ApkSig.class -------------------------------------------------------------------------------- /ApkSig/ApkSig.java: -------------------------------------------------------------------------------- 1 | import java.io.IOException; 2 | import java.io.InputStream; 3 | import java.lang.ref.WeakReference; 4 | import java.security.Signature; 5 | import java.security.cert.*; 6 | import java.util.Enumeration; 7 | import java.util.jar.JarEntry; 8 | import java.util.jar.JarFile; 9 | import java.util.logging.Level; 10 | import java.util.logging.Logger; 11 | 12 | public class ApkSig { 13 | 14 | private static final Object mSync = new Object(); 15 | private static WeakReference mReadBuffer; 16 | 17 | public static void main(String[] args) { 18 | if (args.length < 1) { 19 | System.out.println("Usage: java ApkSig "); 20 | System.exit(-1); 21 | } 22 | 23 | System.out.println(args[0]); 24 | 25 | String mArchiveSourcePath = args[0]; 26 | 27 | WeakReference readBufferRef; 28 | byte[] readBuffer = null; 29 | synchronized (mSync) { 30 | readBufferRef = mReadBuffer; 31 | if (readBufferRef != null) { 32 | mReadBuffer = null; 33 | readBuffer = readBufferRef.get(); 34 | } 35 | if (readBuffer == null) { 36 | readBuffer = new byte[8192]; 37 | readBufferRef = new WeakReference(readBuffer); 38 | } 39 | } 40 | 41 | try { 42 | JarFile jarFile = new JarFile(mArchiveSourcePath); 43 | java.security.cert.Certificate[] certs = null; 44 | 45 | Enumeration entries = jarFile.entries(); 46 | while (entries.hasMoreElements()) { 47 | JarEntry je = (JarEntry) entries.nextElement(); 48 | if (je.isDirectory()) { 49 | continue; 50 | } 51 | if (je.getName().startsWith("META-INF/")) { 52 | continue; 53 | } 54 | java.security.cert.Certificate[] localCerts = loadCertificates(jarFile, je, readBuffer); 55 | if (false) { 56 | System.out.println("File " + mArchiveSourcePath + " entry " + je.getName() 57 | + ": certs=" + certs + " (" 58 | + (certs != null ? certs.length : 0) + ")"); 59 | } 60 | if (localCerts == null) { 61 | System.err.println("Package has no certificates at entry " 62 | + je.getName() + "; ignoring!"); 63 | jarFile.close(); 64 | return; 65 | } else if (certs == null) { 66 | certs = localCerts; 67 | } else { 68 | // Ensure all certificates match. 69 | for (int i = 0; i < certs.length; i++) { 70 | boolean found = false; 71 | for (int j = 0; j < localCerts.length; j++) { 72 | if (certs[i] != null 73 | && certs[i].equals(localCerts[j])) { 74 | found = true; 75 | break; 76 | } 77 | } 78 | if (!found || certs.length != localCerts.length) { 79 | System.err.println("Package has mismatched certificates at entry " 80 | + je.getName() + "; ignoring!"); 81 | jarFile.close(); 82 | return; 83 | } 84 | } 85 | } 86 | } 87 | 88 | jarFile.close(); 89 | 90 | synchronized (mSync) { 91 | mReadBuffer = readBufferRef; 92 | } 93 | 94 | if (certs != null && certs.length > 0) { 95 | final int N = certs.length; 96 | 97 | for (int i = 0; i < N; i++) { 98 | String charSig = new String(toChars(certs[i].getEncoded())); 99 | System.out.println(charSig); 100 | } 101 | } else { 102 | System.err.println("Package has no certificates; ignoring!"); 103 | return; 104 | } 105 | } catch (CertificateEncodingException ex) { 106 | Logger.getLogger(ApkSig.class.getName()).log(Level.SEVERE, null, ex); 107 | } catch (IOException e) { 108 | System.err.println("Exception reading " + mArchiveSourcePath + "\n" + e); 109 | return; 110 | } catch (RuntimeException e) { 111 | System.err.println("Exception reading " + mArchiveSourcePath + "\n" + e); 112 | return; 113 | } 114 | } 115 | 116 | private static char[] toChars(byte[] mSignature) { 117 | byte[] sig = mSignature; 118 | final int N = sig.length; 119 | final int N2 = N * 2; 120 | char[] text = new char[N2]; 121 | 122 | for (int j = 0; j < N; j++) { 123 | byte v = sig[j]; 124 | int d = (v >> 4) & 0xf; 125 | text[j * 2] = (char) (d >= 10 ? ('a' + d - 10) : ('0' + d)); 126 | d = v & 0xf; 127 | text[j * 2 + 1] = (char) (d >= 10 ? ('a' + d - 10) : ('0' + d)); 128 | } 129 | 130 | return text; 131 | } 132 | 133 | private static java.security.cert.Certificate[] loadCertificates(JarFile jarFile, JarEntry je, byte[] readBuffer) { 134 | try { 135 | InputStream is = jarFile.getInputStream(je); 136 | while (is.read(readBuffer, 0, readBuffer.length) != -1) { 137 | } 138 | is.close(); 139 | 140 | return (java.security.cert.Certificate[]) (je != null ? je.getCertificates() : null); 141 | } catch (IOException e) { 142 | System.err.println("Exception reading " + je.getName() + " in " 143 | + jarFile.getName() + ": " + e); 144 | } 145 | return null; 146 | } 147 | } 148 | 149 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Framework Patcher for Android 2 | 3 | ## What this does 4 | If you have a rooted phone, this will allow you to patch the android system and inject features without needing to recompile the OS or install xposed. 5 | 6 | Notably, I made this to inject a fake-signature patch into the system so I can spoof android app signatures. 7 | 8 | ## How to use 9 | 1. Make sure you have Python, Java and adb available 10 | 2. Connect your device via usb. 11 | 3. Make sure Developer Settings is enabled. This is hidden by default since sometime in Android 4.x, you can show it by going to `About Phone` and tapping on the build number five times in succession. 12 | 4. In the phone settings, find the setting for 'Android debugging' and enable it. 13 | 5. Find the setting for 'Root Access' and make sure ADB has root access. 14 | 6. Now, on the computer, run `python3 patch.py` 15 | 7. Reboot phone 16 | 17 | (Note: I have only tested this under Linux) 18 | 19 | You will need to reboot for Android to detect that you've installed a new framework and so for Dalvik/ART to re-optimise all the apps on the phone. Without this, you may receive an `INSTALL_FAILED_DEXOPT` error when installing new apps. You can do this in android's recovery too (provided /system is mounted). 20 | 21 | Note: You will need to redo this everytime you flash a new /system partition (e.g. flashing an updated cyanogenmod zip or new ROM) 22 | 23 | ## How to fake signatures 24 | If you have run `patch.py`, you should now have a system patched to accept spoofed app signatures. (Useful for [microG](https://github.com/microg/android_packages_apps_GmsCore)). This bit below is not necessary if you just want that. 25 | 26 | If you want to modify an arbitrary app and keep its signature by making use of this patch, copy the output of: 27 | 28 | ``` 29 | java /path/to/framework/patcher/ApkSig 30 | ``` 31 | 32 | into a meta-data underneath in the app's AndroidManifest.xml. Disassemble the app as follows: 33 | 34 | ``` 35 | apktool d 36 | ``` 37 | 38 | Then in AndroidManifest.xml, find the following: (the dots represent other parameters not important for this) 39 | 40 | ``` 41 | 42 | ``` 43 | 44 | And insert the meta-data 45 | 46 | ``` 47 | 48 | 51 | ``` 52 | 53 | -------------------------------------------------------------------------------- /patch.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | import os, subprocess, tempfile, time, shutil, sys, glob 3 | from distutils.spawn import find_executable 4 | 5 | POSIX = False if os.sep is "\\" else True 6 | DEBUG_PROCESS = False 7 | 8 | # check if dependencies are there 9 | deperrors = [] 10 | 11 | def exists(program): 12 | if find_executable(program) is not None: 13 | return 0 14 | deperrors.append(program) 15 | return 1 16 | 17 | if exists("zip") + exists("adb") + exists("java") > 0: 18 | print(" *** ERROR: Dependencies not satisfied.") 19 | print("\tPlease make sure you install:\n\t%s" % (deperrors)) 20 | sys.exit(2) 21 | 22 | # start adb server before using it otherwise we get an unintended output inside other commands 23 | subprocess.check_output(["adb", "start-server"]) 24 | 25 | # check if device is connected 26 | devices = subprocess.check_output(["adb", "devices"]).decode("utf-8") 27 | 28 | if devices.count('\n') <= 2: 29 | print(" *** Please connect your device first.") 30 | sys.exit(0) 31 | 32 | if DEBUG_PROCESS: 33 | print(" *** NOTE: Running in debug mode, WILL NOT ACTUALLY PATCH AND PUSH TO DEVICE") 34 | 35 | devices = devices.split('\n')[1:-2] 36 | devices = [a.split("\t")[0] for a in devices] 37 | 38 | if len(devices) > 1: 39 | print("Enter id of device to target:") 40 | id = input("\t"+("\n\t").join([str(i)+" - "+a for i,a in zip(range(1, len(devices)+1), devices)]) + "\n\n> ") 41 | chosen_one = devices[int(id)-1] 42 | else: 43 | chosen_one = devices[0] 44 | 45 | print(" *** Selected device " + chosen_one) 46 | 47 | print(" *** Device detected! proceeding...") 48 | 49 | PREVIOUS_DIR = os.getcwd() 50 | SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__)) 51 | # pull framework somewhere temporary 52 | dirpath = tempfile.mkdtemp() 53 | os.chdir(dirpath) 54 | print(" *** Working dir: %s" % dirpath) 55 | 56 | print(" *** Rooting adbd...") 57 | subprocess.check_call(["adb", "-s", chosen_one, "root"]) 58 | subprocess.check_call(["adb", "-s", chosen_one, "wait-for-device"]) 59 | subprocess.check_call(["adb", "-s", chosen_one, "remount", "/system"]) 60 | 61 | print(" *** Pulling framework from device...") 62 | subprocess.check_output(["adb", "-s", chosen_one, "pull", "/system/framework/framework.jar", "."]) 63 | shutil.copy2("framework.jar", "framework.jar.backup") # back it up in case things ever go wrong 64 | 65 | # disassemble it 66 | print(" *** Disassembling framework...") 67 | subprocess.check_call(["java", "-jar", os.path.join(SCRIPT_DIR, "tools", "baksmali.jar"), "framework.jar", "-o", "classes", "-ls"]) 68 | 69 | # do the injection 70 | print(" *** Done. Now this won't hurt a bit...") 71 | to_patch = os.path.join("classes", "android", "content", "pm", "PackageParser.smali") 72 | if not os.path.exists(to_patch): 73 | print(" *** ERROR: The file to patch cannot be found, probably the ROM is odexed.") 74 | sys.exit(1) 75 | 76 | f = open(to_patch, "r") 77 | old_contents = f.readlines() 78 | f.close() 79 | 80 | f = open(os.path.join(SCRIPT_DIR, "smali", "fillinsig.smali"), "r") 81 | fillinsig = f.readlines() 82 | f.close() 83 | 84 | # add fillinsig method 85 | i = 0 86 | contents = [] 87 | already_patched = False 88 | in_function = False 89 | right_line = False 90 | start_of_line = None 91 | done_patching = False 92 | stored_register = "v11" 93 | partially_patched = False 94 | 95 | while i < len(old_contents): 96 | if ";->fillinsig" in old_contents[i]: 97 | already_patched = True 98 | if ".method public static fillinsig" in old_contents[i]: 99 | partially_patched = True 100 | if ".method public static generatePackageInfo(Landroid/content/pm/PackageParser$Package;[IIJJLjava/util/Set;Landroid/content/pm/PackageUserState;I)Landroid/content/pm/PackageInfo;" in old_contents[i]: 101 | in_function = True 102 | if ".method public static generatePackageInfo(Landroid/content/pm/PackageParser$Package;[IIJJLandroid/util/ArraySet;Landroid/content/pm/PackageUserState;I)Landroid/content/pm/PackageInfo;" in old_contents[i]: 103 | in_function = True 104 | if ".method public static generatePackageInfo(Landroid/content/pm/PackageParser$Package;[IIJJLjava/util/HashSet;Landroid/content/pm/PackageUserState;I)Landroid/content/pm/PackageInfo;" in old_contents[i]: 105 | in_function = True 106 | if ".method public static generatePackageInfo(Landroid/content/pm/PackageParser$Package;[IIJJLjava/util/HashSet;ZII)Landroid/content/pm/PackageInfo;" in old_contents[i]: 107 | in_function = True 108 | if ".end method" in old_contents[i]: 109 | in_function = False 110 | if in_function and ".line" in old_contents[i]: 111 | start_of_line = i + 1 112 | if in_function and "arraycopy" in old_contents[i]: 113 | right_line = True 114 | if in_function and "Landroid/content/pm/PackageInfo;->()V" in old_contents[i]: 115 | stored_register = old_contents[i].split("{")[1].split("}")[0] 116 | if not already_patched and in_function and right_line and not done_patching: 117 | contents = contents[:start_of_line] 118 | contents.append("move-object/from16 v0, p0\n") 119 | contents.append("invoke-static {%s, v0}, Landroid/content/pm/PackageParser;->fillinsig(Landroid/content/pm/PackageInfo;Landroid/content/pm/PackageParser$Package;)V\n" % stored_register) 120 | done_patching = True 121 | else: 122 | contents.append(old_contents[i]) 123 | i = i + 1 124 | 125 | if not DEBUG_PROCESS: 126 | if not already_patched and not partially_patched: 127 | contents.extend(fillinsig) 128 | elif partially_patched and not already_patched: 129 | print(" *** Previous failed patch attempt, not including the fillinsig method again...") 130 | elif already_patched: 131 | print(" *** This framework.jar appears to already have been patched... Exiting.") 132 | sys.exit(0) 133 | f = open(to_patch, "w") 134 | contents = "".join(contents) 135 | f.write(contents) 136 | f.close() 137 | 138 | # reassemble it 139 | print(" *** Injection successful. Reassembling smali...") 140 | subprocess.check_call(["java", "-jar", os.path.join(SCRIPT_DIR, "tools", "smali.jar"), "classes", "-o", "classes.dex"]) 141 | 142 | # put classes.smali into framework.jar 143 | print(" *** Putting things back like nothing ever happened...") 144 | for f in glob.glob("classes*.dex"): 145 | subprocess.check_call(["zip", "-r", "framework.jar", f]) 146 | 147 | # push to device 148 | print(" *** Pushing changes to device...") 149 | if not DEBUG_PROCESS: 150 | subprocess.check_output(["adb", "-s", chosen_one, "push", "framework.jar", "/system/framework/framework.jar"]) 151 | 152 | print(" *** All done! :)") 153 | fjar = os.path.join(dirpath, "framework.jar.backup") 154 | print(" *** Your old framework.jar is present at %s, please run\n \tadb push \"%s\" /system/framework/framework.jar\n from recovery if your phone bootloops to recover." % (fjar, fjar)) 155 | 156 | # return to the previous working directory 157 | os.chdir(PREVIOUS_DIR) 158 | # clean up 159 | #shutil.rmtree(dirpath) 160 | -------------------------------------------------------------------------------- /smali/fillinsig.smali: -------------------------------------------------------------------------------- 1 | 2 | .method public static fillinsig(Landroid/content/pm/PackageInfo;Landroid/content/pm/PackageParser$Package;)V 3 | .locals 9 4 | .param p0, "pi" # Landroid/content/pm/PackageInfo; 5 | .param p1, "p" # Landroid/content/pm/PackageParser$Package; 6 | 7 | .prologue 8 | const/4 v3, 0x0 9 | 10 | .line 26 11 | const/4 v1, 0x0 12 | 13 | .line 28 14 | .local v1, "handledFakeSignature":Z 15 | :try_start_0 16 | iget-object v4, p1, Landroid/content/pm/PackageParser$Package;->mAppMetaData:Landroid/os/Bundle; 17 | 18 | if-eqz v4, :cond_0 19 | 20 | iget-object v4, p1, Landroid/content/pm/PackageParser$Package;->mAppMetaData:Landroid/os/Bundle; 21 | 22 | const-string v5, "fake-signature" 23 | 24 | invoke-virtual {v4, v5}, Landroid/os/Bundle;->get(Ljava/lang/String;)Ljava/lang/Object; 25 | 26 | move-result-object v4 27 | 28 | instance-of v4, v4, Ljava/lang/String; 29 | 30 | if-eqz v4, :cond_0 31 | 32 | .line 30 33 | const/4 v4, 0x1 34 | 35 | new-array v4, v4, [Landroid/content/pm/Signature; 36 | 37 | const/4 v5, 0x0 38 | 39 | new-instance v6, Landroid/content/pm/Signature; 40 | 41 | iget-object v7, p1, Landroid/content/pm/PackageParser$Package;->mAppMetaData:Landroid/os/Bundle; 42 | 43 | const-string v8, "fake-signature" 44 | 45 | invoke-virtual {v7, v8}, Landroid/os/Bundle;->getString(Ljava/lang/String;)Ljava/lang/String; 46 | 47 | move-result-object v7 48 | 49 | invoke-direct {v6, v7}, Landroid/content/pm/Signature;->(Ljava/lang/String;)V 50 | 51 | aput-object v6, v4, v5 52 | 53 | iput-object v4, p0, Landroid/content/pm/PackageInfo;->signatures:[Landroid/content/pm/Signature; 54 | :try_end_0 55 | .catch Ljava/lang/Throwable; {:try_start_0 .. :try_end_0} :catch_0 56 | 57 | .line 31 58 | const/4 v1, 0x1 59 | 60 | .line 37 61 | :cond_0 62 | :goto_0 63 | if-nez v1, :cond_1 64 | 65 | .line 38 66 | iget-object v4, p1, Landroid/content/pm/PackageParser$Package;->mSignatures:[Landroid/content/pm/Signature; 67 | 68 | if-eqz v4, :cond_2 69 | 70 | iget-object v4, p1, Landroid/content/pm/PackageParser$Package;->mSignatures:[Landroid/content/pm/Signature; 71 | 72 | array-length v0, v4 73 | 74 | .line 39 75 | .local v0, "N":I 76 | :goto_1 77 | if-lez v0, :cond_1 78 | 79 | .line 40 80 | new-array v4, v0, [Landroid/content/pm/Signature; 81 | 82 | iput-object v4, p0, Landroid/content/pm/PackageInfo;->signatures:[Landroid/content/pm/Signature; 83 | 84 | .line 41 85 | iget-object v4, p1, Landroid/content/pm/PackageParser$Package;->mSignatures:[Landroid/content/pm/Signature; 86 | 87 | iget-object v5, p0, Landroid/content/pm/PackageInfo;->signatures:[Landroid/content/pm/Signature; 88 | 89 | invoke-static {v4, v3, v5, v3, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V 90 | 91 | .line 44 92 | .end local v0 # "N":I 93 | :cond_1 94 | return-void 95 | 96 | .line 33 97 | :catch_0 98 | move-exception v2 99 | 100 | .line 35 101 | .local v2, "t":Ljava/lang/Throwable; 102 | const-string v4, "PackageParser.FAKE_PACKAGE_SIGNATURE" 103 | 104 | invoke-static {v4, v2}, Landroid/util/Log;->w(Ljava/lang/String;Ljava/lang/Throwable;)I 105 | 106 | goto :goto_0 107 | 108 | .end local v2 # "t":Ljava/lang/Throwable; 109 | :cond_2 110 | move v0, v3 111 | 112 | .line 38 113 | goto :goto_1 114 | .end method 115 | 116 | -------------------------------------------------------------------------------- /tools/baksmali.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/souramoo/Needle/f59253277fea6760ed8451597923a01cf944e3b3/tools/baksmali.jar -------------------------------------------------------------------------------- /tools/smali.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/souramoo/Needle/f59253277fea6760ed8451597923a01cf944e3b3/tools/smali.jar --------------------------------------------------------------------------------