cli: add md5sum util, used for validating downloads

bootfs.manifest

@@ -115,4 +115,5 @@
 /console/ifconfig.js: ../../console/ifconfig.js
 /console/cli.js: ../../console/cli.js
 /console/init.js: ../../console/init.js
+/console/md5sum.js: ../../console/md5sum.js
 /&/etc/hosts: ../../static/&

console/cli.js

@@ -15,6 +15,7 @@ load("/console/tests.js");
 load("/console/run.js");
 load("/console/ifconfig.js");
 load("/console/arp.js");
+load("/console/md5sum.js");
 load("/console/route.js");
 
 // Commands
@@ -29,6 +30,7 @@ _commands["run"] = run_cmd;
 _commands["ifconfig"] = ifconfig_cmd;
 _commands["arp"] = arp_cmd;
 _commands["route"] = route_cmd;
+_commands["md5sum"] = md5sum_cmd;
 
 // Create interface to networking functions
 var networking_interface = new Networking();

console/md5sum.js

+var md5sum_cmd = {
+    init: function() {
+        this._md5 = new MD5();
+    },
+    
+    md5sum: function(filename) {
+       
+       var digest = this._md5.md5(cd.pwd() + "/" + filename);
+       return (digest)
+    },
+    
+    invoke: function(inp) {
+        if (inp.length < 2) {
+            this.help();
+            return;
+        }
+        
+        var digest = this.md5sum(inp[1]);
+        print(digest + "  " + inp[1]);
+        
+        return (digest);
+    },
+    
+    tab: function(inp) {
+        if (inp.length > 2) {
+            return ([]);
+        }
+        
+        if ((inp.length == 2) && (completed_word())) {
+            return ([]);
+        }
+            
+        return (ls.ls());
+    },
+    
+    help: function() {
+        print("md5sum: calculate md5 of file");
+        print("usage: md5sum <filename>");
+    }
+    
+}

java/cloudius/com/cloudius/util/MD5.java

+package com.cloudius.util;
+
+import java.io.FileInputStream;
+import java.security.MessageDigest;
+
+public class MD5 {
+    
+    public static String toHex(byte[] bytes) {
+        final char[] hexArray = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
+        char[] hexChars = new char[bytes.length * 2];
+        int v;
+        for ( int j = 0; j < bytes.length; j++ ) {
+            v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+    
+    public static String md5(String filename) {
+        try {
+            FileInputStream fi = new FileInputStream(filename);
+            MessageDigest m = MessageDigest.getInstance("MD5");
+            m.reset();
+            
+            int chunk_sz = 0x1000;
+            byte bytes[] = new byte[chunk_sz];
+            
+            int len = chunk_sz; 
+            while (len == chunk_sz) {
+                len = fi.read(bytes);
+                m.update(bytes, 0, len);
+            }
+            fi.close();
+            
+            // Calculate digest
+            byte[] digest = m.digest();
+            return (toHex(digest));
+            
+        } catch (Exception ex){
+            System.out.println("md5() error:");
+            ex.printStackTrace();
+            return (null);
+        }
+    }
+}