How to insert and reterive key from registry editor
- by deepa
Hi..
I am new to cryptography.. i have to develop project based on cryptography..In part of my project I have to insert a key to the registry and afterwards i have to reterive the same key for decryption.. i done until getting the path of the registry ..
Here i given my code..
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
public static final String readRegistry(String location, String key) {
try {
// Run reg query, then read output with StreamReader (internal class)
Process process = Runtime.getRuntime().exec("reg query " +
'"' + location + "\" /v " + key);
StreamReader reader = new StreamReader(process.getInputStream());
reader.start();
process.waitFor();
reader.join();
String output = reader.getResult();
// Output has the following format:
// \n<Version information>\n\n<key>\t<registry type>\t<value>
if (!output.contains("\t")) {
return null;
}
// Parse out the value
String[] parsed = output.split("\t");
return parsed[parsed.length - 1];
} catch (Exception e) {
return null;
}
}
static class StreamReader extends Thread {
private InputStream is;
private StringWriter sw = new StringWriter();
;
public StreamReader(InputStream is) {
this.is = is;
}
public void run() {
try {
int c;
while ((c = is.read()) != -1) {
System.out.println("Reading" + c);
sw.write(c);
}
} catch (IOException e) {
System.out.println("Exception in run() " + e);
}
}
public String getResult() {
System.out.println("Content " + sw.toString());
return sw.toString();
}
}
public static boolean addValue(String key, String valName, String val) {
try {
// Run reg query, then read output with StreamReader (internal class)
Process process = Runtime.getRuntime().exec("reg add \"" + key + "\" /v \"" + valName + "\" /d \"\\\"" + val + "\\\"\" /f");
StreamReader reader = new StreamReader(process.getInputStream());
reader.start();
process.waitFor();
reader.join();
String output = reader.getResult();
System.out.println("Processing........ggggggggggggggggggggg." + output);
// Output has the following format:
// \n<Version information>\n\n<key>\t<registry type>\t<value>
return output.contains("The operation completed successfully");
} catch (Exception e) {
System.out.println("Exception in addValue() " + e);
}
return false;
}
public static void main(String[] args) {
// Sample usage
JAXRDeleteConcept hc = new JAXRDeleteConcept();
System.out.println("Before Insertion");
if (JAXRDeleteConcept.addValue("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ComDlg32\\OpenSaveMRU", "REG_SZ", "Muthus")) {
System.out.println("Inserted Successfully");
}
String value = JAXRDeleteConcept.readRegistry("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ComDlg32\\OpenSaveMRU" , "Project_Key");
System.out.println(value);
}
}
But i dont know how to insert a key in a registry and read the particular key which i inserted..Please help me..
Thanks in advance..
