org.argeo.cms.lib.sshd/src/org/argeo/cms/ssh/cli/DefaultClientIdentityLoader.java

   1 package org.argeo.cms.ssh.cli;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.nio.file.Files;
   6 import java.nio.file.Path;
   7 import java.nio.file.Paths;
   8 import java.security.GeneralSecurityException;
   9 import java.security.KeyPair;
  10 import java.util.Objects;
  11
  12 import org.apache.sshd.client.config.keys.ClientIdentityLoader;
  13 import org.apache.sshd.common.NamedResource;
  14 import org.apache.sshd.common.config.keys.FilePasswordProvider;
  15 import org.apache.sshd.common.session.SessionContext;
  16 import org.apache.sshd.common.util.ValidateUtils;
  17 import org.apache.sshd.common.util.io.IoUtils;
  18 import org.apache.sshd.common.util.io.resource.PathResource;
  19 import org.apache.sshd.common.util.security.SecurityUtils;
  20
  21 /** Separate class in order to avoit static field from Apache SSHD. */
  22 class DefaultClientIdentityLoader implements ClientIdentityLoader {
  23         @Override
  24         public boolean isValidLocation(NamedResource location) throws IOException {
  25                 Path path = toPath(location);
  26                 return Files.exists(path, IoUtils.EMPTY_LINK_OPTIONS);
  27         }
  28
  29         @Override
  30         public Iterable<KeyPair> loadClientIdentities(SessionContext session, NamedResource location,
  31                         FilePasswordProvider provider) throws IOException, GeneralSecurityException {
  32                 Path path = toPath(location);
  33                 PathResource resource = new PathResource(path);
  34                 try (InputStream inputStream = resource.openInputStream()) {
  35                         return SecurityUtils.loadKeyPairIdentities(session, resource, inputStream, provider);
  36                 }
  37         }
  38
  39         @Override
  40         public String toString() {
  41                 return "DEFAULT";
  42         }
  43
  44         private Path toPath(NamedResource location) {
  45                 Objects.requireNonNull(location, "No location provided");
  46
  47                 Path path = Paths
  48                                 .get(ValidateUtils.checkNotNullAndNotEmpty(location.getName(), "No location value for %s", location));
  49                 path = path.toAbsolutePath();
  50                 path = path.normalize();
  51                 return path;
  52         }
  53
  54 }