1 files changed, 162 insertions, 0 deletions
diff --git a/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/config/UsersDump.java b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/config/UsersDump.java
new file mode 100644
index 00000000..6fc83f5f
--- /dev/null
+++ b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/config/UsersDump.java
@@ -0,0 +1,162 @@
+/**
+ * ============LICENSE_START====================================================
+ * org.onap.ccsdk
+ * ===========================================================================
+ * Copyright (c) 2023 AT&T Intellectual Property. All rights reserved.
+ * ===========================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END====================================================
+ *
+ */
+
+package org.onap.ccsdk.apps.cadi.config;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.util.Date;
+import java.util.HashSet;
+
+import org.onap.ccsdk.apps.cadi.AbsUserCache;
+import org.onap.ccsdk.apps.cadi.lur.LocalLur;
+
+public class UsersDump {
+
+    /**
+     * @param args
+     */
+    public static boolean write(OutputStream os, AbsUserCache<?> lur) {
+        PrintStream ps;
+        if (os instanceof PrintStream) {
+            ps = (PrintStream)os;
+        } else {
+            ps = new PrintStream(os);
+        }
+        try {
+            ps.println("<?xml version='1.0' encoding='utf-8'?>");
+            ps.println("<!--");
+            ps.print(  "     Code Generated Tomcat Users and Roles from AT&T LUR on ");
+            ps.println(new Date());
+            ps.println(  "-->");
+            ps.println("<tomcat-users>");
+
+            // We loop through Users, but want to write Groups first... therefore, save off print
+            StringBuilder sb = new StringBuilder();
+
+            // Obtain all unique role names
+            HashSet<String> groups = new HashSet<>();
+            for (AbsUserCache<?>.DumpInfo di : lur.dumpInfo()) {
+                sb.append("\n  <user username=\"");
+                sb.append(di.user);
+                sb.append("\" roles=\"");
+                boolean first = true;
+                for (String role : di.perms) {
+                    groups.add(role);
+                    if (first)first = false;
+                    else sb.append(',');
+                    sb.append(role);
+                }
+                sb.append("\"/>");
+
+            }
+
+            // Print roles
+            for (String group : groups) {
+                ps.print("  <role rolename=\"");
+                ps.print(group);
+                ps.println("\"/>");
+            }
+
+            ps.println(sb);
+
+            ps.println("</tomcat-users>");
+            ps.flush();
+        } catch (Exception t) {
+            t.printStackTrace(ps);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     *
+     * Note: This method returns a String if there's an error, or null if ok.
+     * This unusual style is necessitated by the fact that any Exceptions thrown are likely to
+     * be unlogged and hidden from view, making debugging almost impossible.
+     *
+     * @param writeto
+     * @param up
+     * @return
+     */
+    public static String updateUsers(String writeto, LocalLur up) {
+        // Dump a Tomcat-user.xml lookalike (anywhere)
+        if (writeto!=null) {
+            // First read content
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            if (UsersDump.write(baos, up)) {
+                byte[] postulate = baos.toByteArray();
+                // now get contents of file
+                File file = new File(writeto);
+                boolean writeIt;
+                if (file.exists()) {
+                    try {
+                        FileInputStream fis = new FileInputStream(file);
+                        byte[] orig = new byte[(int)file.length()];
+                        int read;
+                        try {
+                            read = fis.read(orig);
+                        } finally {
+                            fis.close();
+                        }
+                        if (read<=0) {
+                            writeIt = false;
+                        } else {
+                            // Starting at third "<" (<tomcat-users> line)
+                            int startA=0, startB=0;
+                            for (int i=0;startA<orig.length && i<3;++startA) if (orig[startA]=='<')++i;
+                            for (int i=0;startB<orig.length && i<3;++startB) if (postulate[startB]=='<')++i;
+
+                            writeIt=orig.length-startA!=postulate.length-startB; // first, check if remaining length is the same
+                            while (!writeIt && startA<orig.length && startB<postulate.length) {
+                                if (orig[startA++]!=postulate[startB++])writeIt = true;
+                            }
+                        }
+                    } catch (Exception e) {
+                        writeIt = true;
+                    }
+                } else {
+                    writeIt = true;
+                }
+
+                if (writeIt) {
+                    try {
+                        FileOutputStream fos = new FileOutputStream(file);
+                        try {
+                            fos.write(postulate);
+                        } finally {
+                            fos.close();
+                        }
+                    } catch (IOException e) {
+                        return e.getMessage();
+                    }
+                }
+            }
+        }
+        return null; // no message means ok.
+    }
+
+}