Shell加密解密文件，,Shell加密解密文件A
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Shell加密解密文件，,Shell加密解密文件A
Shell加密解密文件
A.java
import java.io.*;import javax.swing.*;public class A { private static final String CharSet = "0123456789ABCDEF"; public static void main(String[] args) { JFileChooser jfc = new JFileChooser(); JFileChooser jfc2 = new JFileChooser(); jfc.showDialog(null, "请选择要加密编码的文件"); jfc2.showDialog(null, "请选择要输出的文件名"); if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) { File oldfile = jfc.getSelectedFile(); FileInputStream inStream = null; FileWriter fw = null; try { if (oldfile.exists()) { int byteread = 0; inStream = new FileInputStream(oldfile); fw = new FileWriter(jfc2.getSelectedFile()); byte[] sRead = new byte[10240]; while ((byteread = inStream.read(sRead)) != -1) { StringBuilder smi = new StringBuilder(byteread * 2); int ka = 3, kb = 5, kc = 2, kd = 7, js = 0; if (byteread % 2 != 0) js = 1; for (int i = 0; i < byteread - 1; i += 2) { char c1 = (char) sRead[i]; char c2 = (char) sRead[i + 1]; int tmp = ka * c1 + kc * c2; while (tmp < 0) tmp += 1024; byte s1 = (byte) (tmp % 1024); int js1 = (int) s1 >> 4 & 0xf; smi.append(CharSet.substring(js1, js1 + 1)); int ks1 = s1 & 0xf; smi.append(CharSet.substring(ks1, ks1 + 1)); tmp = kb * c1 + kd * c2; while (tmp < 0) tmp += 1024; byte s2 = (byte) (tmp % 1024); int js2 = (int) s2 >> 4 & 0xf; smi.append(CharSet.substring(js2, js2 + 1)); int ks2 = s2 & 0xf; smi.append(CharSet.substring(ks2, ks2 + 1)); } if (js == 1) { byte s3 = (byte) ((sRead[byteread - 1] - 4) % 1024); int js3 = (int) s3 >> 4 & 0xf; smi.append(CharSet.substring(js3, js3 + 1)); int ks3 = (int) s3 & 0xf; smi.append(CharSet.substring(ks3, ks3 + 1)); } fw.write(smi.toString()); } fw.flush(); } } catch (IOException e) { e.printStackTrace(); } finally { try { fw.close(); inStream.close(); } catch (IOException e) { e.printStackTrace(); } } } }}B.java
import java.io.*;import javax.swing.*;public class B { private static final String CharSet = "0123456789ABCDEF"; private static int niyuan(int m, int n) { int a, b, c, d, t, yu = 0, shang, mod; a = m; b = n; mod = a; c = 0; d = 1; while (b < 0) b += a; if (a % b == 0 || b % 2 == 0) return 0; while (b != 1) { t = a % b; shang = a / b; a = b; b = t; yu = c - shang * d; c = d; d = yu; } if (yu < 0) yu += mod; return yu; } public static void main(String[] args) { // TODO Auto-generated method stub JFileChooser jfc = new JFileChooser(); JFileChooser jfc2 = new JFileChooser(); jfc.showDialog(null, "请选择要解码解密的文件"); jfc2.showDialog(null, "请选择要输出的文件名"); if (jfc.getSelectedFile() != null && jfc2.getSelectedFile() != null) { FileWriter fw = null; try { FileInputStream fis = new FileInputStream(jfc.getSelectedFile()); fw = new FileWriter(jfc2.getSelectedFile()); int byteread = 0; byte[] buffer = new byte[20480]; int ka = 3, kb = 5, kc = 2, kd = 7, js = 0, tmp; int aany, ddny; int r00 = ka * kc * kd; int r01 = -ka * kb * kc; int r10 = -kb * kc * kc; int r11 = ka * kb * kc; int x00 = ka * ka * kc * kd - ka * kb * kc * kc; int x11 = ka * kb * kc * kd - kb * kb * kc * kc; while (x00 % 2 == 0) { x00 /= 2; r00 /= 2; r01 /= 2; } while (x11 % 2 == 0) { x11 /= 2; r10 /= 2; r11 /= 2; } aany = x00; ddny = x11; if (niyuan(1024, aany) != 0 && niyuan(1024, ddny) != 0) { int kn00 = r00 * niyuan(1024, x00); int kn01 = r01 * niyuan(1024, x00); int kn10 = r10 * niyuan(1024, x11); int kn11 = r11 * niyuan(1024, x11); ka = kn00; kb = kn01; kc = kn10; kd = kn11; } else { JOptionPane.showMessageDialog(null, "无逆矩阵！"); System.exit(0); } while (ka < 0) ka += 1024; while (kb < 0) kb += 1024; while (kc < 0) kc += 1024; while (kd < 0) kd += 1024; ka %= 1024; kb %= 1024; kc %= 1024; kd %= 1024; try { while ((byteread = fis.read(buffer)) != -1) { int nLen = byteread / 2; StringBuilder smi = new StringBuilder(nLen); byte[] sming = new byte[nLen]; String chs=new String(buffer,"US-ASCII"); for (int i = 0; i < nLen; i++) { byte bTmp; if (byteread < 2) bTmp = -1; bTmp = (byte) (CharSet.indexOf(chs.substring(i * 2,i * 2+1)) * 16 + CharSet .indexOf(chs.substring(i * 2 + 1,i * 2 + 2))); sming[i] = bTmp; } if (nLen % 2 != 0) js = 1; for (int i = 0; i < nLen - 1; i += 2) { char c1 = (char) sming[i]; char c2 = (char) sming[i + 1]; tmp = ka * c1 + kc * c2; while (tmp < 0) tmp += 1024; char s1 = (char) (tmp % 1024); smi.append(s1); tmp = kb * c1 + kd * c2; while (tmp < 0) tmp += 1024; char s2 = (char) (tmp % 1024); smi.append(s2); } if (js == 1) { char c3 = (char) ((sming[nLen - 1] - 4) % 1024); smi.append(c3); } fw.write(smi.toString(), 0, nLen); } fw.flush(); } catch (IOException e) { e.printStackTrace(); } finally { try { fis.close(); fw.close(); } catch (IOException e) { e.printStackTrace(); } } } catch (FileNotFoundException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } System.exit(0); }}
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