进行字节码变换的工具，可运行的源代码。
其中的apk的目录，需要自己修改成，你的自己的目录。
[代码]xml代码：
package com.ljt.apk; import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException; public class MainClass { public static void main(String[] args) { //包含所有需要加密的apk的父目录 File rootFile = new File("G:\\apk\\apks"); File[] listFiles = rootFile.listFiles(); System.out.println("--------------------------开始执行加密，和文件字节码的破坏------------------------------------"); for(int i = 0; i < listFiles.length; i++){ System.out.println("--------------------------对文件进行加密："+listFiles[i]+"------------------------------------"); // 对压缩文件进行伪加密， try { new ApkUtilTool().ChangToEncryptedEntry(listFiles[i], new File("G:\\apk\\tempApk\\"+listFiles[i].getName())); } catch (IOException e) { e.printStackTrace(); } } System.out.println("--------------------加密完成------------------------"); //加密完成后，的临时目录 File tempFile = new File("G:\\apk\\tempApk"); File[] tempFiles = tempFile.listFiles(); for(int i = 0; i < tempFiles.length; i++){ String name = tempFiles[i].getName(); System.out.println("--------------------破坏文件："+name+"------------------------"); name = name.substring(0,name.length()-4); //加密完成后的目录 File outFile = new File("G:\\apk\\encryptApk\\"+name); outFile.mkdirs(); damageFile(tempFiles[i],outFile.getAbsolutePath()+"\\Android.apk"); tempFiles[i].delete(); } System.out.println("-----------------------------全部完成---------------------------------"); //测试去除伪加密// try {// new ApkUtilTool().FixEncryptedEntry("c:/Android.apk", "c:/Android1.apk");// } catch (IOException e) {// e.printStackTrace();// } } /** * 破坏文件 * @param inFile * @param outFilePath */ public static void damageFile(File inFile,String outFilePath){ try { FileInputStream in = new FileInputStream(inFile); FileOutputStream out = new FileOutputStream(outFilePath); int read = 0; byte[] readBuffer = new byte[512]; long fileSize = inFile.length() - 512; long count = 0; while((read = in.read(readBuffer)) != -1){ if(count > fileSize){ readBuffer[read-2] = (byte) (readBuffer[read-2] ^ 0xff); out.write(readBuffer,0,read); }else{ out.write(readBuffer,0,read); } count += read; } in.close(); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } }} |
package com.ljt.apk; import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.nio.ByteBuffer;import java.nio.channels.FileChannel;import java.util.Arrays;import java.util.zip.ZipError;import com.ljt.apk.ZipConstants; public class ApkUtilTool { private FileChannel ch; // channel to the zipfile private FileChannel fc; /** * 修复zip伪加密状态的Entry * * @param inZip * @param storeZip * @throws IOException */ private void FixEncryptedEntry(File inZip, File fixZip) throws IOException { changEntry(inZip, fixZip, true); } /** * 修复zip伪加密状态的Entry * * @param inZip * @param storeZip * @throws IOException */ public void FixEncryptedEntry(String inZip, String fixZip) throws IOException { FixEncryptedEntry(new File(inZip), new File(fixZip)); } /** * 修改zip的Entry为伪加密状态 * * @param inZip * @param storeZip * @throws IOException */ public void ChangToEncryptedEntry(String inZip, String storeZip) throws IOException { ChangToEncryptedEntry(new File(inZip), new File(storeZip)); } /** * 修改zip的Entry为伪加密状态 * * @param inZip * @param storeZip * @throws IOException */ public void ChangToEncryptedEntry(File inZip, File storeZip) throws IOException { changEntry(inZip, storeZip, false); } /** * 更改zip的Entry为伪加密状态 * * @param inZip * @param storeZip * @param fix * ture:修复伪加密 false:更改到伪加密 * @throws IOException */ private void changEntry(File inZip, File storeZip, boolean fix) throws IOException { FileInputStream fis = new FileInputStream(inZip); FileOutputStream fos = new FileOutputStream(storeZip); byte[] buf = new byte[10240]; int len; while ((len = fis.read(buf)) != -1) { fos.write(buf, 0, len); } ch = fis.getChannel(); fc = fos.getChannel(); changEntry(fix); ch.close(); fc.close(); fis.close(); fos.close(); } // Reads zip file central directory. Returns the file position of first // CEN header, otherwise returns -1 if an error occured. If zip->msg != NULL // then the error was a zip format error and zip->msg has the error text. // Always pass in -1 for knownTotal; it's used for a recursive call. private void changEntry(boolean fix) throws IOException { END end = findEND(); if (end.cenlen > end.endpos) zerror("invalid END header (bad central directory size)"); long cenpos = end.endpos - end.cenlen; // position of CEN table // Get position of first local file (LOC) header, taking into // account that there may be a stub prefixed to the zip file. long locpos = cenpos - end.cenoff; if (locpos < 0) zerror("invalid END header (bad central directory offset)"); // read in the CEN and END byte[] cen = new byte[(int) (end.cenlen + ZipConstants.ENDHDR)]; if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen + ZipConstants.ENDHDR) { zerror("read CEN tables failed"); } int pos = 0; int limit = cen.length - ZipConstants.ENDHDR; while (pos < limit) { if (ZipConstants.CENSIG(cen, pos) != ZipConstants.CENSIG) zerror("invalid CEN header (bad signature)"); int method = ZipConstants.CENHOW(cen, pos); int nlen = ZipConstants.CENNAM(cen, pos); int elen = ZipConstants.CENEXT(cen, pos); int clen = ZipConstants.CENCOM(cen, pos); if (fix) { if ((ZipConstants.CENFLG(cen, pos) & 1) != 0) { byte[] name = Arrays.copyOfRange(cen, pos + ZipConstants.CENHDR, pos + ZipConstants.CENHDR + nlen); System.out.println("Found the encrypted entry : " + new String(name) + ", fix..."); // b[n] & 0xff) | ((b[n + 1] & 0xff) << 8 cen[pos + 8] &= 0xFE; // cen[pos+8] ^= CEN***(cen, pos) % 2; // cen[pos+8] ^= cen[pos+8] % 2; // zerror("invalid CEN header (encrypted entry)"); } } else { if ((ZipConstants.CENFLG(cen, pos) & 1) == 0) { byte[] name = Arrays.copyOfRange(cen, pos + ZipConstants.CENHDR, pos + ZipConstants.CENHDR + nlen); System.out.println("Chang the entry : " + new String(name) + ", Encrypted..."); // b[n] & 0xff) | ((b[n + 1] & 0xff) << 8 cen[pos + 8] |= 0x1; // zerror("invalid CEN header (encrypted entry)"); } } if (method != ZipConstants.METHOD_STORED && method != ZipConstants.METHOD_DEFLATED) zerror("invalid CEN header (unsupported compression method: " + method + ")"); if (pos + ZipConstants.CENHDR + nlen > limit) zerror("invalid CEN header (bad header size)"); // skip ext and comment pos += (ZipConstants.CENHDR + nlen + elen + clen); } writeFullyAt(cen, 0, cen.length, cenpos); if (pos + ZipConstants.ENDHDR != cen.length) { zerror("invalid CEN header (bad header size)"); } } // Reads len bytes of data from the specified offset into buf. // Returns the total number of bytes read. // Each/every byte read from here (except the cen, which is mapped). final long readFullyAt(byte[] buf, int off, long len, long pos) throws IOException { ByteBuffer bb = ByteBuffer.wrap(buf); bb.position(off); bb.limit((int) (off + len)); return readFullyAt(bb, pos); } private final long readFullyAt(ByteBuffer bb, long pos) throws IOException { synchronized (ch) { return ch.position(pos).read(bb); } } final long writeFullyAt(byte[] buf, int off, long len, long pos) throws IOException { ByteBuffer bb = ByteBuffer.wrap(buf); bb.position(off); bb.limit((int) (off + len)); return writeFullyAt(bb, pos); } private final long writeFullyAt(ByteBuffer bb, long pos) throws IOException { synchronized (fc) { return fc.position(pos).write(bb); } } // Searches for end of central directory (END) header. The contents of // the END header will be read and placed in endbuf. Returns the file // position of the END header, otherwise returns -1 if the END header // was not found or an error occurred. private END findEND() throws IOException { byte[] buf = new byte[ZipConstants.READBLOCKSZ]; long ziplen = ch.size(); long minHDR = (ziplen - ZipConstants.END_MAXLEN) > 0 ? ziplen - ZipConstants.END_MAXLEN : 0; long minPos = minHDR - (buf.length - ZipConstants.ENDHDR); for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - ZipConstants.ENDHDR)) { int off = 0; if (pos < 0) { // Pretend there are some NUL bytes before start of file off = (int) -pos; Arrays.fill(buf, 0, off, (byte) 0); } int len = buf.length - off; if (readFullyAt(buf, off, len, pos + off) != len) zerror("zip END header not found"); // Now scan the block backwards for END header signature for (int i = buf.length - ZipConstants.ENDHDR; i >= 0; i--) { if (buf[i + 0] == (byte) 'P' && buf[i + 1] == (byte) 'K' && buf[i + 2] == (byte) '\005' && buf[i + 3] == (byte) '\006' && (pos + i + ZipConstants.ENDHDR + ZipConstants.ENDCOM(buf, i) == ziplen)) { // Found END header buf = Arrays.copyOfRange(buf, i, i + ZipConstants.ENDHDR); END end = new END(); end.endsub = ZipConstants.ENDSUB(buf); end.centot = ZipConstants.ENDTOT(buf); end.cenlen = ZipConstants.ENDSIZ(buf); end.cenoff = ZipConstants.ENDOFF(buf); end.comlen = ZipConstants.ENDCOM(buf); end.endpos = pos + i; if (end.cenlen == ZipConstants.ZIP64_MINVAL || end.cenoff == ZipConstants.ZIP64_MINVAL || end.centot == ZipConstants.ZIP64_MINVAL32) { // need to find the zip64 end; byte[] loc64 = new byte[ZipConstants.ZIP64_LOCHDR]; if (readFullyAt(loc64, 0, loc64.length, end.endpos - ZipConstants.ZIP64_LOCHDR) != loc64.length) { return end; } long end64pos = ZipConstants.ZIP64_LOCOFF(loc64); byte[] end64buf = new byte[ZipConstants.ZIP64_ENDHDR]; if (readFullyAt(end64buf, 0, end64buf.length, end64pos) != end64buf.length) { return end; } // end64 found, re-calcualte everything. end.cenlen = ZipConstants.ZIP64_ENDSIZ(end64buf); end.cenoff = ZipConstants.ZIP64_ENDOFF(end64buf); end.centot = (int) ZipConstants.ZIP64_ENDTOT(end64buf); // assume // total // < // 2g end.endpos = end64pos; } return end; } } } zerror("zip END header not found"); return null; // make compiler happy } static void zerror(String msg) { throw new ZipError(msg); } // End of central directory record static class END { int disknum; int sdisknum; int endsub; // endsub int centot; // 4 bytes long cenlen; // 4 bytes long cenoff; // 4 bytes int comlen; // comment length byte[] comment; /* members of Zip64 end of central directory locator */ int diskNum; long endpos; int disktot; @Override public String toString() { return "disknum : " + disknum + "\n" + "sdisknum : " + sdisknum + "\n" + "endsub : " + endsub + "\n" + "centot : " + centot + "\n" + "cenlen : " + cenlen + "\n" + "cenoff : " + cenoff + "\n" + "comlen : " + comlen + "\n" + "diskNum : " + diskNum + "\n" + "endpos : " + endpos + "\n" + "disktot : " + disktot; } }} |
package com.ljt.apk; class ZipConstants { /* * Compression methods */ static final int METHOD_STORED = 0; static final int METHOD_DEFLATED = 8; static final int METHOD_DEFLATED64 = 9; static final int METHOD_BZIP2 = 12; static final int METHOD_LZMA = 14; static final int METHOD_LZ77 = 19; static final int METHOD_AES = 99; /* * General purpose big flag */ static final int FLAG_ENCRYPTED = 0x01; static final int FLAG_DATADESCR = 0x08; // crc, size and csize in dd static final int FLAG_EFS = 0x800; // If this bit is set the filename and // comment fields for this file must be // encoded using UTF-8. /* * Header signatures */ static long LOCSIG = 0x04034b50L; // "PK\003\004" static long EXTSIG = 0x08074b50L; // "PK\007\008" static long CENSIG = 0x02014b50L; // "PK\001\002" static long ENDSIG = 0x06054b50L; // "PK\005\006" /* * Header sizes in bytes (including signatures) */ static final int LOCHDR = 30; // LOC header size static final int EXTHDR = 16; // EXT header size static final int CENHDR = 46; // CEN header size static final int ENDHDR = 22; // END header size /* * Local file (LOC) header field offsets */ static final int LOCVER = 4; // version needed to extract static final int LOCFLG = 6; // general purpose bit flag static final int LOCHOW = 8; // compression method static final int LOCTIM = 10; // modification time static final int LOCCRC = 14; // uncompressed file crc-32 value static final int LOCSIZ = 18; // compressed size static final int LOCLEN = 22; // uncompressed size static final int LOCNAM = 26; // filename length static final int LOCEXT = 28; // extra field length /* * Extra local (EXT) header field offsets */ static final int EXTCRC = 4; // uncompressed file crc-32 value static final int EXTSIZ = 8; // compressed size static final int EXTLEN = 12; // uncompressed size /* * Central directory (CEN) header field offsets */ static final int CENVEM = 4; // version made by static final int CENVER = 6; // version needed to extract static final int CENFLG = 8; // encrypt, decrypt flags static final int CENHOW = 10; // compression method static final int CENTIM = 12; // modification time static final int CENCRC = 16; // uncompressed file crc-32 value static final int CENSIZ = 20; // compressed size static final int CENLEN = 24; // uncompressed size static final int CENNAM = 28; // filename length static final int CENEXT = 30; // extra field length static final int CENCOM = 32; // comment length static final int CENDSK = 34; // disk number start static final int CENATT = 36; // internal file attributes static final int CENATX = 38; // external file attributes static final int CENOFF = 42; // LOC header offset /* * End of central directory (END) header field offsets */ static final int ENDSUB = 8; // number of entries on this disk static final int ENDTOT = 10; // total number of entries static final int ENDSIZ = 12; // central directory size in bytes static final int ENDOFF = 16; // offset of first CEN header static final int ENDCOM = 20; // zip file comment length /* * ZIP64 constants */ static final long ZIP64_ENDSIG = 0x06064b50L; // "PK\006\006" static final long ZIP64_LOCSIG = 0x07064b50L; // "PK\006\007" static final int ZIP64_ENDHDR = 56; // ZIP64 end header size static final int ZIP64_LOCHDR = 20; // ZIP64 end loc header size static final int ZIP64_EXTHDR = 24; // EXT header size static final int ZIP64_EXTID = 0x0001; // Extra field Zip64 header ID static final int ZIP64_MINVAL32 = 0xFFFF; static final long ZIP64_MINVAL = 0xFFFFFFFFL; /* * Zip64 End of central directory (END) header field offsets */ static final int ZIP64_ENDLEN = 4; // size of zip64 end of central dir static final int ZIP64_ENDVEM = 12; // version made by static final int ZIP64_ENDVER = 14; // version needed to extract static final int ZIP64_ENDNMD = 16; // number of this disk static final int ZIP64_ENDDSK = 20; // disk number of start static final int ZIP64_ENDTOD = 24; // total number of entries on this disk static final int ZIP64_ENDTOT = 32; // total number of entries static final int ZIP64_ENDSIZ = 40; // central directory size in bytes static final int ZIP64_ENDOFF = 48; // offset of first CEN header static final int ZIP64_ENDEXT = 56; // zip64 extensible data sector /* * Zip64 End of central directory locator field offsets */ static final int ZIP64_LOCDSK = 4; // disk number start static final int ZIP64_LOCOFF = 8; // offset of zip64 end static final int ZIP64_LOCTOT = 16; // total number of disks /* * Zip64 Extra local (EXT) header field offsets */ static final int ZIP64_EXTCRC = 4; // uncompressed file crc-32 value static final int ZIP64_EXTSIZ = 8; // compressed size, 8-byte static final int ZIP64_EXTLEN = 16; // uncompressed size, 8-byte /* * Extra field header ID */ static final int EXTID_ZIP64 = 0x0001; // ZIP64 static final int EXTID_NTFS = 0x000a; // NTFS static final int EXTID_UNIX = 0x000d; // UNIX static final int EXTID_EFS = 0x0017; // Strong Encryption static final int EXTID_EXTT = 0x5455; // Info-ZIP Extended Timestamp /* * fields access methods */ /////////////////////////////////////////////////////// static final int CH(byte[] b, int n) { return b[n] & 0xff; } static final int SH(byte[] b, int n) { return (b[n] & 0xff) | ((b[n + 1] & 0xff) << 8); } static final long LG(byte[] b, int n) { return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL; } static final long LL(byte[] b, int n) { return (LG(b, n)) | (LG(b, n + 4) << 32); } static final long GETSIG(byte[] b) { return LG(b, 0); } // local file (LOC) header fields static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature static final int LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract static final int LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags static final int LOCHOW(byte[] b) { return SH(b, 8); } // compression method static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size static final int LOCNAM(byte[] b) { return SH(b, 26);} // filename length static final int LOCEXT(byte[] b) { return SH(b, 28);} // extra field length // extra local (EXT) header fields static final long EXTCRC(byte[] b) { return LG(b, 4);} // crc of uncompressed data static final long EXTSIZ(byte[] b) { return LG(b, 8);} // compressed size static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size // end of central directory header (END) fields static final int ENDSUB(byte[] b) { return SH(b, 8); } // number of entries on this disk static final int ENDTOT(byte[] b) { return SH(b, 10);} // total number of entries static final long ENDSIZ(byte[] b) { return LG(b, 12);} // central directory size static final long ENDOFF(byte[] b) { return LG(b, 16);} // central directory offset static final int ENDCOM(byte[] b) { return SH(b, 20);} // size of zip file comment static final int ENDCOM(byte[] b, int off) { return SH(b, off + 20);} // zip64 end of central directory recoder fields static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);} // total number of entries on disk static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);} // total number of entries static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);} // central directory size static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);} // central directory offset static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);} // zip64 end offset // central directory header (CEN) fields static final long CENSIG(byte[] b, int pos) { return LG(b, pos + 0); } static final int CENVEM(byte[] b, int pos) { return SH(b, pos + 4); } static final int CENVER(byte[] b, int pos) { return SH(b, pos + 6); } static final int CENFLG(byte[] b, int pos) { return SH(b, pos + 8); } static final int CENHOW(byte[] b, int pos) { return SH(b, pos + 10);} static final long CENTIM(byte[] b, int pos) { return LG(b, pos + 12);} static final long CENCRC(byte[] b, int pos) { return LG(b, pos + 16);} static final long CENSIZ(byte[] b, int pos) { return LG(b, pos + 20);} static final long CENLEN(byte[] b, int pos) { return LG(b, pos + 24);} static final int CENNAM(byte[] b, int pos) { return SH(b, pos + 28);} static final int CENEXT(byte[] b, int pos) { return SH(b, pos + 30);} static final int CENCOM(byte[] b, int pos) { return SH(b, pos + 32);} static final int CENDSK(byte[] b, int pos) { return SH(b, pos + 34);} static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);} static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);} static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);} /* The END header is followed by a variable length comment of size < 64k. */ static final long END_MAXLEN = 0xFFFF + ENDHDR; static final int READBLOCKSZ = 128;} |
对apk进行多一层的保护，使代码更安全可靠，很难被更改。