MD5 string
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5 {
private static final String TAG = "MD5";
public static boolean checkMD5(String md5, File updateFile) {
if (md5 == null || md5.equals("") || updateFile == null) {
return false;
}
String calculatedDigest = calculateMD5(updateFile);
if (calculatedDigest == null) {
return false;
}
return calculatedDigest.equalsIgnoreCase(md5);
}
public static String calculateMD5(File updateFile) {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
return null;
}
InputStream is;
try {
is = new FileInputStream(updateFile);
} catch (FileNotFoundException e) {
return null;
}
byte[] buffer = new byte[8192];
int read;
try {
while ((read = is.read(buffer)) > 0) {
digest.update(buffer, 0, read);
}
byte[] md5sum = digest.digest();
BigInteger bigInt = new BigInteger(1, md5sum);
String output = bigInt.toString(16);
// Fill to 32 chars
output = String.format("%32s", output).replace(' ', '0');
return output;
} catch (IOException e) {
throw new RuntimeException("Unable to process file for MD5", e);
} finally {
try {
is.close();
} catch (IOException e) {
System.out.println(e);
}
}
}
public static String getRecoveryMD5() {
String MD5string = "";
String recoveryFilename = "/dev/mtd/mtd1";
try {
Process p = Runtime.getRuntime().exec("su");
OutputStream os = p.getOutputStream();
os.write(("md5sum " + recoveryFilename).getBytes());
os.flush();
os.close();
InputStream is = p.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String str = br.readLine();
MD5string = str.split(" ")[0].trim();
is.close();
br.close();
p.destroy();
} catch (Exception e) {
System.out.println(e);
return null;
}
System.out.println(MD5string);
return MD5string;
}
}
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