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How to Encrypt in C# .NET same as Java code

By : user3851771
Date : October 15 2020, 11:12 PM
this one helps. Are you certain that the encryption algorithm, the block cipher mode and padding mode are equivalent in your C# implementation when compared to your java implementation?
Edit: Actually for RSACryptoProvider you probably don't need cipher/padding mode - take a look at the example on MSDN, specifically the section on importing public key information via ImportParameters
code :

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delphi encrypt convert Java Code

By : mvk
Date : March 29 2020, 07:55 AM
To fix the issue you can do There are two distinct errors.
Firstly, the updating of key1 must use rValue rather than bValue.
code :
key1 = ((rValue[0]+key1)*key2+key3) & 0xffff;
class SO15885898 {

    private static String ValueToHex(int myInt)
        StringBuilder sb = new StringBuilder();
        sb.append(Integer.toHexString(myInt & 0xff));
        if (sb.length() < 2) {
            sb.insert(0, '0'); // pad with leading zero if needed
        return sb.toString();

    public static void main(String[] args)
        int key1=11;        
        int key2=22;        
        int key3=33;

        String value = "ABCDE";
        for(int i=0; i<value.length(); i++){
            byte bValue = value.substring(i).getBytes()[0];
            int rValue = bValue^(key1>>8);
            key1 = ((rValue+key1)*key2+key3) & 0xffff;

Convert Encrypt code in java to Ruby

By : kvsimons
Date : March 29 2020, 07:55 AM
Does that help I have been trying to convert a code for encrypt in java to ruby, but I am not able to do it completely. I getting different values. , Encrypt Code:
code :
def aes(key,string)
  cipher = OpenSSL::Cipher::Cipher.new("aes-128-cbc")
  cipher.padding = 1
  cipher.key = hex_to_bin(Digest::SHA1.hexdigest('secret_key')[0..32])
  cipher_text = cipher.update(string)
  cipher_text << cipher.final
  return bin_to_hex(cipher_text).upcase
def aes_decrypt(key, encrypted)
  encrypted = hex_to_bin(encrypted.downcase)
  cipher = OpenSSL::Cipher::Cipher.new("aes-128-cbc")
  cipher.padding = 1
  cipher.key = hex_to_bin(Digest::SHA1.hexdigest('secret_key')[0..32])
  d = cipher.update(encrypted)
  d << cipher.final
def hex_to_bin(str)
  [str].pack "H*"

def bin_to_hex(s)
  s.unpack('C*').map{ |b| "%02X" % b }.join('')

java DES encrypt code convert to ruby

By : hugin
Date : March 29 2020, 07:55 AM
I wish this help you Hi I have a java android encrypt method, and want to convert to ruby code.
code :
des = OpenSSL::Cipher::Cipher.new("DES-CBC")
des.key = "xxxx"
des.iv = "xxxx"
cipher = des.update(str) + des.final

Java code to encrypt a given sting

By : guihailiuli
Date : March 29 2020, 07:55 AM
I wish this helpful for you You need an extra loop to check which character matches from s2 string.Other than that,you will have to use modulo operator to avoid ArrayIndexOutOfBound.
Try this
code :
public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String s1 = "qwertyuiopasdfghjklzxcvbnm";
        String s2 = "mnbvcxzasdfghjklpoiuytrewq";
        String input, out = "";
        System.out.println("enter input string");
        input = sc.nextLine();
        for (int i = 0; i < input.length(); i++) {
            for (int j = 0; j < s2.length(); j++) {
                if (input.charAt(i) == s2.charAt(j)) {
                     out += s1.charAt((j + 3)%26);

out += s1.charAt((j + 3)%26);

Converting a PHP encrypt code to Java show error?

By : codeguy
Date : March 29 2020, 07:55 AM
I hope this helps . Just like the ill-fated mcrypt crap, openssl_encrypt allows incorrectly sized keys. Instead of rejecting such keys, it simply fills the rest of the key with zero valued bytes ("\0" in PHP). This is completely against any good cryptographic practice, by almost any library for higher level languages.
This is very likely due to two reasons:
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