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annotate src/goodjava/io/IoUtils.java @ 1506:d80395468b4e

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ssl security in code
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 15 May 2020 18:29:47 -0600
parents e66e3d50b289
children 86c5e7000ecf
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1 package goodjava.io;
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2
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3 import java.io.File;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6 import java.io.IOException;
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7 import java.nio.file.Files;
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8 import java.security.Security;
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9 import javax.net.ssl.SSLSocketFactory;
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10 import javax.net.ssl.SSLServerSocketFactory;
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12
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13 public final class IoUtils {
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14 private IoUtils() {} // never
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15
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16 public static void move( File from, File to ) throws IOException {
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17 Files.move( from.toPath(), to.toPath() );
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18 }
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19
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20 public static void delete(File file) throws IOException {
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21 Files.deleteIfExists( file.toPath() );
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22 }
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23
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24 public static void mkdirs(File file) throws IOException {
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25 Files.createDirectories( file.toPath() );
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26 }
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27
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28 public static boolean isSymbolicLink(File file) {
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29 return Files.isSymbolicLink(file.toPath());
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30 }
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31
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32 public static void deleteRecursively(File file) throws IOException {
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33 if( file.isDirectory() && !isSymbolicLink(file) ) {
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34 for( File f : file.listFiles() ) {
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35 deleteRecursively(f);
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36 }
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37 }
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38 delete(file);
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39 }
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40
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41 public static void link(File existing,File link) throws IOException {
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42 Files.createLink( link.toPath(), existing.toPath() );
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43 }
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44
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45 public static void symlink(File existing,File link) throws IOException {
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46 Files.createSymbolicLink( link.toPath(), existing.toPath() );
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47 }
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48
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49 public static void copyAll(InputStream in,OutputStream out)
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50 throws IOException
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51 {
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52 byte[] a = new byte[8192];
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53 int n;
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54 while( (n=in.read(a)) != -1 ) {
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55 out.write(a,0,n);
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56 }
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57 in.close();
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58 }
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61 static {
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62 // undo restrictions of modern scum
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63 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC");
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64 }
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66 public static SSLSocketFactory getSSLSocketFactory() {
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67 return (SSLSocketFactory)SSLSocketFactory.getDefault();
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68 }
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70 public static SSLServerSocketFactory getSSLServerSocketFactory() {
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71 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
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72 }
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74 }