Android的伪加密解析代码

最新推荐文章于 2022-06-16 22:46:21 发布
最新推荐文章于 2022-06-16 22:46:21 发布
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文章标签： android
本文介绍如何使用Java代码对APK文件进行伪加密和解密操作，详细解析了伪加密的原理及Java实现过程，包括修复与更改加密状态的方法。

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</pre><pre name="code" class="java">

package Utils;

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;

public class ApkUtilTool {

	private FileChannel ch; // channel to the zipfile
	private FileChannel fc;

	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;

	/**
	 * 修复zip伪加密状态的Entry
	 * 
	 * @param inZip
	 * @param storeZip
	 * @throws IOException
	 */
	public 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(File inZip, File storeZip)
			throws IOException {
		changEntry(inZip, storeZip, false);
	}

	/**
	 * 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));
	}

	/**
	 * 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 + ENDHDR)];
		if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen + ENDHDR) {
			zerror("read CEN tables failed");
		}

		int pos = 0;
		int limit = cen.length - ENDHDR;
		while (pos < limit) {
			if (CENSIG(cen, pos) != CENSIG)
				zerror("invalid CEN header (bad signature)");
			int method = CENHOW(cen, pos);
			int nlen = CENNAM(cen, pos);
			int elen = CENEXT(cen, pos);
			int clen = CENCOM(cen, pos);

			if (fix) {
				if ((CENFLG(cen, pos) & 1) != 0) {
					byte[] name = Arrays.copyOfRange(cen, pos + CENHDR, pos
							+ 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] ^= CENFLG(cen, pos) % 2;
					// cen[pos+8] ^= cen[pos+8] % 2;
					// zerror("invalid CEN header (encrypted entry)");
				}
			} else {
				if ((CENFLG(cen, pos) & 1) == 0) {
					byte[] name = Arrays.copyOfRange(cen, pos + CENHDR, pos
							+ 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 != METHOD_STORED && method != METHOD_DEFLATED)
				zerror("invalid CEN header (unsupported compression method: "
						+ method + ")");
			if (pos + CENHDR + nlen > limit)
				zerror("invalid CEN header (bad header size)");

			// skip ext and comment
			pos += (CENHDR + nlen + elen + clen);
		}

		writeFullyAt(cen, 0, cen.length, cenpos);

		if (pos + 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[READBLOCKSZ];
		long ziplen = ch.size();
		long minHDR = (ziplen - END_MAXLEN) > 0 ? ziplen - END_MAXLEN : 0;
		long minPos = minHDR - (buf.length - ENDHDR);

		for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - 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 - 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 + ENDHDR + ENDCOM(buf, i) == ziplen)) {
					// Found END header
					buf = Arrays.copyOfRange(buf, i, i + ENDHDR);
					END end = new END();
					end.endsub = ENDSUB(buf);
					end.centot = ENDTOT(buf);
					end.cenlen = ENDSIZ(buf);
					end.cenoff = ENDOFF(buf);
					end.comlen = ENDCOM(buf);
					end.endpos = pos + i;
					if (end.cenlen == ZIP64_MINVAL
							|| end.cenoff == ZIP64_MINVAL
							|| end.centot == ZIP64_MINVAL32) {
						// need to find the zip64 end;
						byte[] loc64 = new byte[ZIP64_LOCHDR];
						if (readFullyAt(loc64, 0, loc64.length, end.endpos
								- ZIP64_LOCHDR) != loc64.length) {
							return end;
						}
						long end64pos = ZIP64_LOCOFF(loc64);
						byte[] end64buf = new byte[ZIP64_ENDHDR];
						if (readFullyAt(end64buf, 0, end64buf.length, end64pos) != end64buf.length) {
							return end;
						}
						// end64 found, re-calcualte everything.
						end.cenlen = ZIP64_ENDSIZ(end64buf);
						end.cenoff = ZIP64_ENDOFF(end64buf);
						end.centot = (int) 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;
		}
	}

}

</pre><pre name="code" class="java">
//<span style="color: rgb(68, 68, 68); font-family: 宋体;font-size:18px; line-height: 27px;">测试代码:</span>
package Utils;


import java.io.IOException;


public class TestApkUtil {


<span style="white-space:pre">	</span>public static void main(String[] args) {
<span style="white-space:pre">		</span>String file = "E:/apkzip/icqupt.apk";
<span style="white-space:pre">		</span>String fix = "E:/apkzip/icqupt_new.apk";
<span style="white-space:pre">		</span>// String fix2 = "C:/Users/Zhou/Desktop/tesa/bb.apk";
<span style="white-space:pre">		</span>try {
<span style="white-space:pre">			</span>ApkUtilTool apkUtilTool = new ApkUtilTool();
<span style="white-space:pre">			</span>// apkUtilTool.FixEncryptedEntry(file, fix);
<span style="white-space:pre">			</span>// 进行加密
<span style="white-space:pre">			</span>apkUtilTool.ChangToEncryptedEntry(file, fix);


<span style="white-space:pre">			</span>// 进行解密
<span style="white-space:pre">			</span>// apkUtilTool.FixEncryptedEntry(fix, fix2);
<span style="white-space:pre">		</span>} catch (IOException e) {
<span style="white-space:pre">			</span>// TODO Auto-generated catch block
<span style="white-space:pre">			</span>e.printStackTrace();
<span style="white-space:pre">		</span>}
<span style="white-space:pre">	</span>}
}



 伪加密是Android4.2.x系统发布前最流行的加密方式之一，通过java代码对APK(压缩文件)进行伪加密，其修改原理是修改连续4位字节标记为”P K 01 02”的后第5位字节，奇数表示不加密偶数表示加密。伪加密后的APK不但可以防止PC端对它的解压和查看也同样能防止反编译工具编译。

    但是伪加密对其APK加密后市场也无法对其进行安全检测，部分市场会拒绝这类APK上传市场。伪加密的加密方式和解密方式也早已公布导致它的安全程度也大大降低。Android4.2.x系统无法安装伪加密的APK。


ckdroid
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对apk 文件进行伪加密
11-10
java 对apk 文件进行伪加密，然后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。
apk伪加密技术
{丸の子}
12-18 541
首先了解下什么样的apk，是经过经过伪加密的 [img]http://dl2.iteye.com/upload/attachment/0104/4733/645c816f-4211-351a-b42c-5c489d0d98a9.png[/img] 我们经过压缩软件打开需要密码的就是伪加密的apk 其实这种加密的效果不大 下面分析下吧， 首先新建一个zip压缩文件，修改后缀名为apk ...
安卓伪加密工具_Android源码.zip
09-07
安卓伪加密工具
安卓伪加密工具.rar
12-17
源码参考，欢迎下载
安卓伪加密解密工具
12-07
把工具放到D盘APK文件夹，然后把要加密或者解密的apk名字改成1.apk，点击加密或解密bat就能实现apk的伪加密或解除伪加密功能，就是打开后apk文件带*，要解压出来需要密码，但是真正的密码是不存在的因为这个是伪加密。 如果想放别的文件夹请自行用记事本打开bat进行修改。
Android 伪淘宝代码实现
03-07
"Android 伪淘宝代码实现"项目旨在提供一个基础框架，帮助开发者理解如何构建一个功能丰富的移动购物应用。虽然这个实现可能没有完全实现淘宝的所有功能，如结算功能，但它依然包含了诸多Android开发中的重要知识点...
安卓伪加密工具.zip项目安卓应用源码下载
03-09
【安卓伪加密工具.zip项目详解】 本项目名为“安卓伪加密工具”，主要涉及的是Android应用程序的安全性和隐私保护方面的知识。在Android平台上，由于其开放性，应用的安全问题尤为重要，而加密技术则是保护用户数据...
APK防反编译策略：非法指令、隐藏代码与伪加密技术详解
本文档主要探讨了安卓APK防反编译技术，针对Android应用的可逆性问题，提出了两种策略来保护代码安全：添加非法指令和隐藏敏感代码。 1. 添加非法指令： 该方法通过在APK中嵌入一个名为Bomb的无关类，其内含一个...
实现apk文件伪加密与解密的Java源码解析
在这些技术中，APK伪加密是一种广泛使用的方法，它通过加密APK文件，以达到保护代码不被直接查看的目的。 ### APK伪加密概述 APK伪加密是一种简单的加密技术，用于加密Android应用程序包。这种加密并非是完全安全...
伪加密APK和解密
01-04
把工具放到D盘APK文件夹，然后把要加密或者解密的apk名字改成1.apk，点击加密或解密bat就能实现apk的伪加密或解除伪加密功能，就是打开后apk文件带*，要解压出来需要密码，但是真正的密码是不存在的因为这个是伪加密。 如果想放别的文件夹请自行用记事本打开bat进行修改。
apk伪加密java源码，可实现加密解密。
10-25
将apk文件放到指定文件夹下，运行程序完成加密解密，生成到指定的文件夹下。 apk的存取和存放路径都可以自定义。
判断文件apk伪加密.zip
09-29
该脚本可判断当前的文件或者是apk是否为伪加密，运行环境要在Java的环境下，在文件内附带有使用说明书
apk加壳和伪加密（防止反编译）
08-20
apk加壳和伪加密（防止反编译） 包括3个工程： 一个是加壳java工程； 一个是加壳安卓工程； 一个是apkdemo源程序； 直接运行Packers工程下面的build.xml文件后，在Packers的bin目录下查看Packers-release.apk即可安装测试。 其中：签名key文件请自己提供，在ant.properties中配置即可。
Androidjava 对apk 文件进行伪加密，然后进行字节码变换的工具，可运行的源代码
12-17
源码参考，欢迎下载
安卓伪加密工具的学习与源码解析
安卓伪加密工具可能是一种用于Android系统的加密工具，它提供的加密功能并非真正的安全加密，而是模拟加密的过程，用于教育目的或演示用途。它可能使用某种加密算法的模拟来展示加密解密的过程，而不具有实际的安全...
Android 伪加密和解决思路
Arthas的博客
06-16 1333
我们都知道Android的apk文件就是一个zip格式的文件。研究一下Android 11源码中的zip解压库，看看有什么特殊的地方。
APK伪加密
06-04 915
一、伪加密技术原理 我们知道android apk本质上是zip格式的压缩包，我们将android应用程序的后缀.apk改为.zip就可以用解压软件轻松的将android应用程序解压缩。在日常生活或者工作中，我们通常为了保护我们自己的文件在进行压缩式都会进行加密处理。这样的方法对于android apk同样适用。原理很简单，在zip的文件格式中有一个位用来标示该zip压缩文件中的文件是...
apk伪加密的学习
justwyy的专栏
09-04 300
apk伪加密的学习 http://bbs.pediy.com/showthread.php?t=174825 https://github.com/blueboxsecurity/DalvikBytecodeTampering/blob/master/unpack.py
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