From 6e9146c91ab9ec78837fa9ba7e21e2c01b72907f Mon Sep 17 00:00:00 2001
From: Thialfihar <thialfihar@gmail.com>
Date: Tue, 17 Aug 2010 01:02:39 +0000
Subject: added initial support for HKP key servers, allowing searching and key
 import

Update issue 9
Can search a key server now, touch a result to import the key. Still needs better error handling and some Intents to import keys based on key ID. Also still need key server preferences.
---
 src/org/thialfihar/android/apg/HkpKeyServer.java | 119 +++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 src/org/thialfihar/android/apg/HkpKeyServer.java

(limited to 'src/org/thialfihar/android/apg/HkpKeyServer.java')

diff --git a/src/org/thialfihar/android/apg/HkpKeyServer.java b/src/org/thialfihar/android/apg/HkpKeyServer.java
new file mode 100644
index 000000000..ce65e1da2
--- /dev/null
+++ b/src/org/thialfihar/android/apg/HkpKeyServer.java
@@ -0,0 +1,119 @@
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLEncoder;
+import java.util.GregorianCalendar;
+import java.util.List;
+import java.util.Vector;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.text.Html;
+
+public class HkpKeyServer extends KeyServer {
+    private String mHost;
+    private short mPort = 11371;
+
+    // example:
+    // pub  2048R/<a href="/pks/lookup?op=get&search=0x887DF4BE9F5C9090">9F5C9090</a> 2009-08-17 <a href="/pks/lookup?op=vindex&search=0x887DF4BE9F5C9090">Jörg Runge &lt;joerg@joergrunge.de&gt;</a>
+    public static Pattern PUB_KEY_LINE =
+            Pattern.compile("pub +([0-9]+)([a-z]+)/.*?0x([0-9a-z]+).*? +([0-9-]+) +(.+)[\n\r]+((?:    +.+[\n\r]+)*)",
+                            Pattern.CASE_INSENSITIVE);
+    public static Pattern USER_ID_LINE =
+            Pattern.compile("^   +(.+)$", Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
+
+    public HkpKeyServer(String host) {
+        mHost = host;
+    }
+
+    public HkpKeyServer(String host, short port) {
+        mHost = host;
+        mPort = port;
+    }
+
+    @Override
+    List<KeyInfo> search(String query)
+            throws MalformedURLException, IOException {
+        Vector<KeyInfo> results = new Vector<KeyInfo>();
+
+        String url = "http://" + mHost + ":" + mPort + "/pks/lookup?op=index&search=" +
+                     URLEncoder.encode(query, "utf8");
+        URL realUrl = new URL(url);
+        URLConnection conn = realUrl.openConnection();
+        InputStream is = conn.getInputStream();
+        ByteArrayOutputStream raw = new ByteArrayOutputStream();
+
+        byte buffer[] = new byte[1 << 16];
+        int n = 0;
+        while ((n = is.read(buffer)) != -1) {
+            raw.write(buffer, 0, n);
+        }
+
+        String encoding = conn.getContentEncoding();
+        if (encoding == null) {
+            encoding = "utf8";
+        }
+        String data = raw.toString(encoding);
+        Matcher matcher = PUB_KEY_LINE.matcher(data);
+        while (matcher.find()) {
+            KeyInfo info = new KeyInfo();
+            info.size = Integer.parseInt(matcher.group(1));
+            info.algorithm = matcher.group(2);
+            info.keyId = Apg.keyFromHex(matcher.group(3));
+            info.fingerPrint = Apg.getFingerPrint(info.keyId);
+            String chunks[] = matcher.group(4).split("-");
+            info.date = new GregorianCalendar(Integer.parseInt(chunks[0]),
+                                              Integer.parseInt(chunks[1]),
+                                              Integer.parseInt(chunks[2])).getTime();
+            info.userIds = new Vector<String>();
+            if (matcher.group(5).startsWith("*** KEY")) {
+                info.revoked = matcher.group(5);
+            } else {
+                String tmp = matcher.group(5).replaceAll("<.*?>", "");
+                tmp = Html.fromHtml(tmp).toString();
+                info.userIds.add(tmp);
+            }
+            if (matcher.group(6).length() > 0) {
+                Matcher matcher2 = USER_ID_LINE.matcher(matcher.group(6));
+                while (matcher2.find()) {
+                    String tmp = matcher2.group(1).replaceAll("<.*?>", "");
+                    tmp = Html.fromHtml(tmp).toString();
+                    info.userIds.add(tmp);
+                }
+            }
+            results.add(info);
+        }
+
+        return results;
+    }
+
+    @Override
+    String get(long keyId)
+            throws MalformedURLException, IOException {
+        String url = "http://" + mHost + ":" + mPort +
+                     "/pks/lookup?op=get&search=0x" + Apg.keyToHex(keyId);
+        URL realUrl = new URL(url);
+        URLConnection conn = realUrl.openConnection();
+        InputStream is = conn.getInputStream();
+        ByteArrayOutputStream raw = new ByteArrayOutputStream();
+
+        byte buffer[] = new byte[1 << 16];
+        int n = 0;
+        while ((n = is.read(buffer)) != -1) {
+            raw.write(buffer, 0, n);
+        }
+
+        String data = raw.toString();
+        Matcher matcher = Apg.PGP_PUBLIC_KEY.matcher(data);
+        if (matcher.find()) {
+            return matcher.group(1);
+        }
+
+        return null;
+    }
+}
-- 
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