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Update PasswordService.java #1

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155 changes: 124 additions & 31 deletions features18/src/base64Changes/PasswordService.java
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Original file line number Diff line number Diff line change
@@ -1,43 +1,136 @@
package base64Changes;
import java.util.*;
// import java.security.MessageDigest;
// import java.security.NoSuchAlgorithmException;
// import java.util.Base64;
// import java.util.Base64.Decoder;
// import java.util.Base64.Encoder;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import java.util.Base64.Decoder;
import java.util.Base64.Encoder;

public class PasswordService {
public static void main(String[] args) throws NoSuchAlgorithmException {
String pwd ="Mohan@0123";
Encoder encoder = Base64.getEncoder();
// public class PasswordService {
// public static void main(String[] args) throws NoSuchAlgorithmException {
// String pwd ="Mohan@0123";
// Encoder encoder = Base64.getEncoder();

// converting string to byte[] and passing as input for encode() method
byte[] encode= encoder.encode(pwd.getBytes());
// // converting string to byte[] and passing as input for encode() method
// byte[] encode= encoder.encode(pwd.getBytes());


//converting byte[] to string
String encodedpwd = new String(encode);
System.out.println(encodedpwd);
// //converting byte[] to string
// String encodedpwd = new String(encode);
// System.out.println(encodedpwd);

System.out.println("===============================");
// System.out.println("===============================");

Decoder decoder = Base64.getDecoder();
byte[] decode = decoder.decode(encodedpwd);
String decodedpwd = new String(decode);
System.out.println(decodedpwd);
// Decoder decoder = Base64.getDecoder();
// byte[] decode = decoder.decode(encodedpwd);
// String decodedpwd = new String(decode);
// System.out.println(decodedpwd);

System.out.println("=================================");
// Encryption
String pwd1 ="Mohan@0123";
MessageDigest md = MessageDigest.getInstance("SHA-256");
byte[] digest = md.digest(pwd1.getBytes());
String encrypted = new String(digest);
System.out.println("Encripted :: "+encrypted);
// System.out.println("=================================");
// // Encryption
// String pwd1 ="Mohan@0123";
// MessageDigest md = MessageDigest.getInstance("SHA-256");
// byte[] digest = md.digest(pwd1.getBytes());
// String encrypted = new String(digest);
// System.out.println("Encripted :: "+encrypted);

Encoder encoder1 = Base64.getEncoder();
byte[] encode1=encoder1.encode(digest);
System.out.println("Encripted + Encoded ::" + new String(encode));
// Encoder encoder1 = Base64.getEncoder();
// byte[] encode1=encoder1.encode(digest);
// System.out.println("Encripted + Encoded ::" + new String(encode));

}
// }
// }

class PasswordService
{
static void block(String []arr)
{
String BASE64="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
String cipher="";
System.out.print("ciphertext: ");
for(int i=0;i<arr.length;i++)
{
int ascii=0;
int j=0;
int pow=0;
while(j<6)
{
char c=arr[i].charAt(j);
if(c=='1')
{
ascii+=(int)Math.pow(2,5-j);
pow++;
j++;
}
else
{
pow++;
j++;
continue;
}
}

cipher+=BASE64.charAt(ascii);
}
System.out.print(cipher);
}
public static void main(String s[])
{
base64_encode obj=new base64_encode();
Scanner input=new Scanner(System.in);
System.out.print("Enter something: ");
String plain=input.nextLine();
String combined_binary="";
int count=0;
int j=0;

for(int i=0;i<plain.length();i++)
{
String binary="";
int c=(int)plain.charAt(i);
binary+="";
while(c>0)
{
int rem=c%2;
binary=rem+binary;
c/=2;

}
while (binary.length() < 8)
{
binary="0"+binary;
}
System.out.print(binary+" ");
combined_binary+=binary;
}



if(combined_binary.length()%6!=0)
{
while(combined_binary.length()%6!=0)
{
combined_binary+="0";
}
}

String arr[]=new String[combined_binary.length()/6];

for(;count<combined_binary.length();)
{
String blockString="";
int i=0;

while(i<6)
{
char c=combined_binary.charAt(count);
blockString+=c;
count++;
i++;
}
arr[j]=blockString;
j++;
}
block(arr);
}
}