Initial commit.

src/main/java/com/ryanmichela/sshd/PublicKeyAuthenticator.java

@@ -0,0 +1,50 @@
+package com.ryanmichela.sshd;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.sshd.server.PublickeyAuthenticator;
+import org.apache.sshd.server.session.ServerSession;
+
+import java.io.File;
+import java.io.FileReader;
+import java.security.PublicKey;
+
+/**
+ * Copyright 2013 Ryan Michela
+ */
+public class PublicKeyAuthenticator implements PublickeyAuthenticator {
+    private File authorizedKeysDir;
+
+    public PublicKeyAuthenticator(File authorizedKeysDir) {
+        this.authorizedKeysDir = authorizedKeysDir;
+    }
+
+    @Override
+    public boolean authenticate(String username, PublicKey key, ServerSession session) {
+        byte[] keyBytes = key.getEncoded();
+        File keyFile = new File(authorizedKeysDir, username);
+
+        if (keyFile.exists()) {
+            try {
+
+                FileReader fr = new FileReader(keyFile);
+                PemDecoder pd = new PemDecoder(fr);
+                PublicKey k = pd.getPemBytes();
+                pd.close();
+
+                if (k != null) {
+                    if (ArrayUtils.isEquals(key.getEncoded(), k.getEncoded())) {
+                        return true;
+                    }
+                } else {
+                    SshdPlugin.instance.getLogger().severe("Failed to parse PEM file. " + keyFile.getAbsolutePath());
+                }
+            } catch (Exception e) {
+                SshdPlugin.instance.getLogger().severe("Failed to process public key " + keyFile.getAbsolutePath() + ". " + e.getMessage());
+            }
+        } else {
+            SshdPlugin.instance.getLogger().warning("Could not locate public key for " + username + ". Make sure the user's key is named the same as their user name without a file extension.");
+        }
+
+        return false;
+    }
+}