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rgngl/tizenrecover.java

Created December 9, 2013 07:09
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  1. rgngl created this gist Dec 9, 2013.
    88 changes: 88 additions & 0 deletions tizenrecover.java
    View file
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    // Small utility to recover forgotten Tizen certificate password.
    // If you still have the Eclipse IDE remembering the password, you
    // can find it in encrypted form in a file:
    // <WORKSPACE>/.metadata/.plugins/org.tizen.common.sign/profiles.xml
    // Then simply paste the password from that file to this utility as
    // a command line parameter.

    // Code is mostly copied from Tizen IDE source code.
    package fi.ustun.tizendecipher;

    import javax.crypto.Cipher;
    import javax.crypto.SecretKey;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.DESedeKeySpec;

    public class Main {
    private final static char[] ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".toCharArray();

    private static int[] toInt = new int[128];

    static {
    for(int i=0; i< ALPHABET.length; i++){
    toInt[ALPHABET[i]]= i;
    }
    }

    public static byte[] base64Decode(String s){
    int delta = s.endsWith( "==" ) ? 2 : s.endsWith( "=" ) ? 1 : 0;
    byte[] buffer = new byte[s.length()*3/4 - delta];
    int mask = 0xFF;
    int index = 0;
    for(int i=0; i< s.length(); i+=4){
    int c0 = toInt[s.charAt( i )];
    int c1 = toInt[s.charAt( i + 1)];
    buffer[index++]= (byte)(((c0 << 2) | (c1 >> 4)) & mask);
    if(index >= buffer.length){
    return buffer;
    }
    int c2 = toInt[s.charAt( i + 2)];
    buffer[index++]= (byte)(((c1 << 4) | (c2 >> 2)) & mask);
    if(index >= buffer.length){
    return buffer;
    }
    int c3 = toInt[s.charAt( i + 3 )];
    buffer[index++]= (byte)(((c2 << 6) | c3) & mask);
    }
    return buffer;
    }

    private static final String password = "KYANINYLhijklmnopqrstuvwx";
    private static SecretKey SECRETE_KEY;
    private static Cipher DES_CIPHER;
    private static final String ALGORITHM = "DESede";

    static {
    try {
    byte key[] = password.getBytes();
    DESedeKeySpec desKeySpec = new DESedeKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
    SECRETE_KEY = keyFactory.generateSecret(desKeySpec);

    DES_CIPHER = Cipher.getInstance(ALGORITHM + "/ECB/PKCS5Padding");
    } catch (Throwable t) {
    System.out.println("Exception occurred while creating secret key" + t);
    }
    }

    private static byte[] decryptByDES(byte[] bytes) throws Exception{
    DES_CIPHER.init(Cipher.DECRYPT_MODE, SECRETE_KEY);

    return DES_CIPHER.doFinal(bytes);
    }

    public static String getDecryptedString(String s) throws Exception {
    return new String(decryptByDES(base64Decode(s)));
    }

    public static void main(String[] args) {
    if (args.length < 1)
    System.exit(-1);

    try {
    System.out.println(getDecryptedString(args[0]));
    } catch (Exception e) {

    }
    }
    }