How to decrypt MD5

Hi,
how can I decrypt encrypted text with MD5?

You CAN'T. Message digests (including MD5) is the one way function. You can only calculate MD5 for the candidate text and then compare with the stored MD5.

Similar Messages

How to decrypt md5 in pl/sql

Hello !
Can somebody tell that how to decrypt password of md5 type encryption.
Is there any way of decrypt md5 .
Regards

Actually i have a encrypted password field in the table and i want to compare that field with the value in the textbox .
For that purpose i cant compare the simple text value(in the text box)with the encrypted value in table . so i need to first convert the simple text value in md5 and then compare that value with value in table (password field).
So i want to know that how to convert value to MD5 in PL/SQL .
Regards

How to decrypt MD5 data

Hi,
I am Having the password of my application in MD5 format.I need to get the decrypted password.How to obtain that.
Thanks In Advance,

I'm making some assumptions based on the limited info you have provided...
You are trying to log into a webapp, the user supplies a username/password so you have both in plaintext.
You are getting the stored password from the webapp's storage and it is coming out in "MD5" format because it was digested when it was stored.
What you need to do is digest (aka hash) the user-supplied password using the MD5 algorithm and compare the result with what was taken from storage. If they match, the password is correct and let the user in, if not, reject the login attempt.
simplified steps:
- user foo registers, uses "password" as password, webapp digests the password using MD5 and gets: 286755fad04869ca523320acce0dc6a4
- user foo tries to login and supplies "cat" as the password, webapp pulls the stored password for foo out (286755fad04869ca523320acce0dc6a4) and then digests what the user just passed in "cat" and gets 54b8617eca0e54c7d3c8e6732c6b687a
does 54b8617eca0e54c7d3c8e6732c6b687a = 286755fad04869ca523320acce0dc6a4? NO, don't let user in.
- user foo tries to login and supplies "password" as the password, webapp pulls the stored password for foo out (286755fad04869ca523320acce0dc6a4) and then digests what the user just passed in "password" and gets 286755fad04869ca523320acce0dc6a4
does 286755fad04869ca523320acce0dc6a4 = 286755fad04869ca523320acce0dc6a4? YES, let user in.

How to decrypt data when you can't get the private key in Windows?

I'm very confuse. My english is poor, but I try to say my question clearly.
When browser connects to a https website which needs client certificate to authenticate the identity, the browser will send client certificate to web server.
Then the web server will use the certificate to encrypt some data and send it to browser.
Then broswer should have private key to decrypt that.
But as I know, if I install a pfx format personal certificate, I can set can't export private key, which means you can't get the private key to use it. So how can
the browser decrypt the data without private key?
By the way, what is CSP, use CSP's interface can we use CryptoAPI
to decrypt data without private key?

Answer for question is "you cant"..
"How to decrypt data when you can't get the private key in Windows?"
Read more
http://msdn.microsoft.com/en-us/library/windows/desktop/aa387460(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/bb427432(v=vs.85).aspx
http://technet.microsoft.com/en-us/library/dd277320.aspx
http://en.wikipedia.org/wiki/Public-key_cryptography

One file Encrypt in VB using 3DES how to Decrypt in Java ?

one file Encrypt in VB using 3DES how to Decrypt in Java ?
plese give me code
shrinath

My problem is something similar to him, but mine is in Tandem C. I have a encrypted text, which was encrypted in Tandem C using OpenSSL. I used CBC mode with no padding, i just wrote the encrypted text to a file & i tried reading the cipher from a Java program, so as to decrypt using the same CBC mode & no padding mode. but it is not decrypted as intended to be.
can u pls give ur comment? if u have any code can u pls share it here?

How to decrypt to get the message digest?

Ok, I'm aware that, message digest, is a one-way hash algorithm. From what I gathered, we can decrypt then use the MessageDigest method, IsEqual to compared the hash value to ensure they are the same right?
But my problem is, right now, I has the code to encrypt and digitally signed on a xml.
But no one has used it before to decrypt. So i need to find out how.
Below is the code to generate the signed XML.
Can anyone tell me how to decrypt it?
Thanks...
    public boolean generateSignXmlDocument(String xmlDocPath, String newDocPath, KeyStore keystore, String alias, String password)
        boolean status = false;
        try
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            dbf.setNamespaceAware(true);
            DocumentBuilder builder = dbf.newDocumentBuilder();
            File f = new File(xmlDocPath);
            Document doc = builder.parse(new FileInputStream(f));
            KeyPair kp = getPrivateKey(keystore, alias, password);
            DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement());
            String providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");
            log.info("Creating xml sign.....");
            log.debug("Provider Name " + providerName);
            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM", (Provider)Class.forName(providerName).newInstance());
            javax.xml.crypto.dsig.Reference ref = fac.newReference("", fac.newDigestMethod("http://www.w3.org/2000/09/xmldsig#sha1", null), Collections.singletonList(fac.newTransform("http://www.w3.org/2000/09/xmldsig#enveloped-signature", null)), null, null);
            javax.xml.crypto.dsig.SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod("http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments", null), fac.newSignatureMethod("http://www.w3.org/2000/09/xmldsig#rsa-sha1", null), Collections.singletonList(ref));
            KeyInfoFactory kif = fac.getKeyInfoFactory();
            javax.xml.crypto.dsig.keyinfo.KeyValue kv = kif.newKeyValue(kp.getPublic());
            javax.xml.crypto.dsig.keyinfo.KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
            XMLSignature signature = fac.newXMLSignature(si, ki);
            signature.sign(dsc);
            java.io.OutputStream os = new FileOutputStream(newDocPath);
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer trans = tf.newTransformer();
            trans.transform(new DOMSource(doc), new StreamResult(os));
            status = true;
        catch(Exception e)
            log.error(e);
        return status;
    }

Kyle Treece wrote:
It says that both IMAP and POP are enabled in my settings.
what settings ? in gmail webmail interface? I'm talking about how your gmail account is configured in Mail on your computer. It's configured for POP. you need to delete it from Mail and then create a new account in Mail and make it IMAP. do not use automated account setup which Mail will offer to do. that will make the account POP again. enter all server info and account type by hand.
see this link for details
http://mail.google.com/support/bin/answer.py?answer=81379
If I turn POP completely off, will it kick all the messages out of my iPhone?
as I said, this is not about turning something on or off in webmail gmail. you have to configure your email client Mail correctly. it will have no effect on your iphone.

How to Decrypt security answer

Hi,
I have retrieved the "securityanswer" attribute value using UME APIs.Its in SSHA format. I have to decrypt the answer and compare with user input. Is there any SAP security APIs for doing this?. I followed this [tread|How to decrypt security answer in UME ]. I couldnu2019t get the idea behind SSHA. Help me to get through this.
Regards,
Malini.V

I don't think it is possible in SAP system's.
SAP will not allow to decrypt any security related information. Admin person can change... but can't view.
If SAP system's allows to view encrypted info...I am sure it will be a big problem.

How to decrypt external hard drive so it can be re-partitioned

I can't repartition an external hard drive which has been encrypted as a time machine backup drive. So I am trying to remove the encryption. But I can't figure out how to decrypt the drive either. I know it is still encrypted since it requires the password when I mount the drive. I have successfuly erased all data at the partition level. But there is no ERASE tab at root level. When I try to re-partition it shows a greyed out "current" and the only thing I can do is to create a 2nd partition the identical size as the first.
I have tried ejecting and remounting. I have tried 2 different macs. Repair disk shows "it appears to be ok". Any suggestions?

To do this, follow these steps:
1. Open the OS X Terminal utility and run the following command:
diskutil cs list
The output of this command will look like a hierarchical tree. Locate the long alphanumeric code next to the words "Logical Volume Group" (this code is called a "UUID"), and copy this code to the clipboard by highlighting it and then pressing Command-C.
2. Run the following command to destroy the logical volume group, replacing "UUID" with the alphanumeric string from the first command.
diskutil cs delete UUID
When done this will clear the volume and allow it to be formatted and otherwise customized. See the following screenshot for what this should look like (the two commands are underlined in blue:

How to decrypt external hard drive on lion filevault

How to decrypt external hard drive on lion filevault

To do this, follow these steps:
1. Open the OS X Terminal utility and run the following command:
diskutil cs list
The output of this command will look like a hierarchical tree. Locate the long alphanumeric code next to the words "Logical Volume Group" (this code is called a "UUID"), and copy this code to the clipboard by highlighting it and then pressing Command-C.
2. Run the following command to destroy the logical volume group, replacing "UUID" with the alphanumeric string from the first command.
diskutil cs delete UUID
When done this will clear the volume and allow it to be formatted and otherwise customized. See the following screenshot for what this should look like (the two commands are underlined in blue:

How to include md5 package in application

Hi All,
First of all sorry I posted in another users thread. In the thread http://forums.sun.com/thread.jspa?threadID=5426671 the person used org.bouncycastle.crypto.digests.MD5Digest for doing md5.
I need some help here on how you include the org.bouncycastle.crypto.digests.MD5Digest library in my java code as I want to use the md5.
I am also working on something similar like that but without the web application part and a detail which consists on OTP part using md5.
As the md5() doesn't work in j2me so was also searching for something which will work on MIDP.
package com.abc; //package define
public class messDig5 //class define
    private String generateHash(String OTP, int loopNum) {
        byte[] secretBytes = OTP.getBytes();
        for (int x = 0; x < loopNum; x++) {
            byte[] tempStore = new byte[16];
            tempStore = hash(secretBytes);
            secretBytes = tempStore;
     //   return convertToHex(secretBytes);
        return byteArrayToHexString(secretBytes);
    public byte[] hash(byte[] secretBytes) {
       org.bouncycastle.crypto.digests.MD5Digest digest = new org.bouncycastle.crypto.digests.MD5Digest();
        digest.reset();
        // Update MD5 digest with user secret in byte format
        digest.update(secretBytes, 0, secretBytes.length);
        // get length of digest to initialise new md5 byte array
        int length = digest.getDigestSize();
        // create md5 byte array using length
        byte[] md5 = new byte[length];
        // calculate MD5 hash, using md5 byte array, 0 for buffer offset
        digest.doFinal(md5, 0);
        return md5;
//    private static String convertToHex(byte[] data) {
//        StringBuffer buf = new StringBuffer();
//        String Hex;
//        String formattedHex;
//        for (int i = 0; i < data.length; i++) {
//            int halfbyte = (data[i] >>> 4) & 0x0F;
//            int two_halfs = 0;
//            do {
//                if ((0 <= halfbyte) && (halfbyte <= 9)) {
//                    buf.append((char) ('0' + halfbyte));
//                } else {
//                    buf.append((char) ('a' + (halfbyte - 10)));
//                halfbyte = data[i] & 0x0F;
//            } while (two_halfs++ < 1);
//        Hex = buf.toString();
//        formattedHex = "\n" + Hex.substring(0, 4) + " " + Hex.substring(4, 8) + " " + Hex.substring(8, 12) + " " + Hex.substring(12, 16) + " " + Hex.substring(16, 20) + " " + Hex.substring(20, 24) + " " + Hex.substring(24, 28) + " " + Hex.substring(28, 32);
//        return formattedHex;
    static String byteArrayToHexString(byte byteValues[]) {
        byte singleChar = 0;
        if (byteValues == null || byteValues.length <= 0) {
            return null;
        String entries[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
            "a", "b", "c", "d", "e", "f"};
        StringBuffer out = new StringBuffer(byteValues.length * 2);
        for (int i = 0; i < byteValues.length; i++) {
            singleChar = (byte) (byteValues[i] & 0xF0);
            singleChar = (byte) (singleChar >>> 4);
            // shift the bits down
            singleChar = (byte) (singleChar & 0x0F);
            out.append(entries[(int) singleChar]);
            singleChar = (byte) (byteValues[i] & 0x0F);
            out.append(entries[(int) singleChar]);
        String rslt = new String(out);
        return rslt;

Camellia,
I take you already added bouncycatsle to your project as a compile dependency, since it compiles (unless it does not).
All you have to do for your code to work on the phone, you need to build your JAR file (that you use to distribute your MIDlet) with bouncycastle packaged in. This will all depend on the method you use to build your JAD and JAR files.
I use antenna tool, which provides me with ant tasks to compile, build jar, package external libraries etc. Your scenario can be different, but all you have to do is to search manuals and/or google for methods on how to package external libraries with your build.
Daniel

How to use MD5 format of string

i want to change a password string to md5 format
how can i do it

http://www.twmacinta.com/myjava/fast_md5.php

How to decrypt AES using a key

The example here will Generate the secret key specs first.
http://java.sun.com/developer/technicalArticles/Security/AES/AES_v1.html
I already have a Decrypt Key used in my server application. How can I use that key to decrypt the msg sent from server?

Hi
I wrote this code to check Java encryption with AES and a key. This worked fine for me. Please have a look.
Encrypt and decrypt using the DES private key algorithm
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
public class AESEncrypt {
    public static void main (String[] args) throws Exception {
        Security.addProvider(new BouncyCastleProvider());
        byte[] plainText = "LOGIN=2222=v2-0-b7=SMST=smst=ASI".getBytes("utf-8");
        // Get a DES private key
        System.out.println( "\nAES key" );
        String strKey = "75de8a33d3f18f1c29d86fa42b1894c7";
        byte[] keyBytes = hexToBytes(strKey);
        // skeyspec is the key to encrypt and decrypt
        SecretKeySpec skeySpec = new SecretKeySpec(keyBytes, "AES");
        System.out.println("Key: " + asHex(key.getEncoded()));
        System.out.println( "Finish generating AES key" );
        // Creates the DES Cipher object (specifying the algorithm, mode, and padding).
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
        // Print the provider information
        System.out.println( "\n" + cipher.getProvider().getInfo() );
        System.out.println( "\nStart encryption" );
        // Initializes the Cipher object.
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        // Encrypt the plaintext using the public key
        byte[] cipherText = cipher.doFinal(plainText);
        System.out.println( "Finish encryption: cipherText: " + asHex(cipherText));
        System.out.println( "\nStart decryption" );
        // Initializes the Cipher object.
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        // Decrypt the ciphertext using the same key
        byte[] newPlainText = cipher.doFinal(cipherText);
        System.out.println( "Finish decryption: " );
        System.out.print( asHex(newPlainText) );
    public static String asHex (byte buf[]) {
      StringBuffer strbuf = new StringBuffer(buf.length * 2);
      int i;
      for (i = 0; i < buf.length; i++) {
       if (((int) buf[i] & 0xff) < 0x10)
         strbuf.append("0");
       strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
      return strbuf.toString();
    public static byte[] hexToBytes(char[] hex) {
        int length = hex.length / 2;
        byte[] raw = new byte[length];
        for (int i = 0; i < length; i++) {
            int high = Character.digit(hex[i * 2], 16);
            int low = Character.digit(hex[i * 2 + 1], 16);
            int value = (high << 4) | low;
            if (value > 127) value -= 256;
            raw[i] = (byte)value;
        return raw;
    public static byte[] hexToBytes(String hex) {
        return hexToBytes(hex.toCharArray());
}

How to decrypt filname of report in frsinput or frsoutput?

He experts,
is it possible to decrypt the filename of a report which is saved in the subdirectory /frsinput or /frsoutput? I like to write a script which lists all files, the size and the source system. So, maybe the source system is part of the filename?
The problem is, that I have different customers on a Business Objects XI 3.1 installation and I like to know, which customer needs how much disc space. Maybe there is another solution for my problem?
Thanks and best regards,
Max J. Power

there is no way to "decrypt" file names in the FRS.
nor is there a way to assign specific disk or directory quotes for a set of users in BOE.
As for determining needed disk space, it is not trivial. you have to know total number of reports and instances in your system, them multiple that number by average report/instance size - that'll give you an absolute minimum size required.

Net Guide - How to decrypt?

Hi Everybody,
I downloaded the NVIDIA nForce4 System Drivers for K8N NEO4 Platinum Ultra board from MSI site.
After installing the said driver files into the system, I have found a PDF file in the name of Net Guide in Ethernet / Firewall /docs directory.
I tried to read the file. In my pdf viewer it could not be viewed. The message replied was, can not decrypt the netguide file.
I therefore request any of you to provide me the details to decrypt or how to do technique.
Thanksl.

Quote from: softwheels on 26-September-05, 16:23:13
Hi!
Thanks to your replies.
I find the replies are very novice and childish. I think that this forum really lacks good technical hands to answer such good questions. I appreciate your attempts to answer my question.
The error message reported was only by an acrobat editor. I am a software engineer and knows things in good detail to handle normal troubles.
I find that the error reported by me is intentionally created by the MSI. Reasons not known to me.
May be MSI expect it's users to register with them to have access to such pdf books or manuals.
I expect more concrete and correct replies from good technical heads.
Hope somebody come with correct reply. Thanks to you all.
Yeah, Bass', you big jerk! How could you say such a thing?
Actually, Bass' is quite a helpful guy - if you look at his other posts, you'll see him lending a helping hand quite a bit. With the limitations of a text-only interface like any user forum, it's easy to misunderstand people's 'tone of voice' from a text post. A 'thick skin' is essential with a user forum....at least until it's clear someone is trying to slam you - then 'fire at will'

How to enforce md5 function to accept varchar2?

I am trying to use md5 function from dbms_obfuscation_toolkit package.
There are two functions called md5 in that package, the first one accepts one parameter as raw and returns raw whereas the second one accepts one parameter as varchar2 and returns varchar2.
I want to use the second one (varchar2) I tried this code:
declare
v_output varchar2(16);
v_checksum varchar2(16);
v_input varchar2(50) DEFAULT 'SAAD';
begin
v_checksum := dbms_obfuscation_toolkit.md5 (input_string => 'SAAD');
v_output := dbms_obfuscation_toolkit.md5(v_input);
if (v_output = v_checksum) then
dbms_output.put_line('TRUE');
else
dbms_output.put_line('FALSE');
end if;
end;
An eror message appeared:
PLS-00307:too many declarations of 'MD5' match this call
I tried to cast inout_string using cast('SAAD' as varchar2(16)) but it didn't change anything.
How can I enforce md5 function to accept varchar2 and return varchar2

I am getting inproper output if I pass HARBINDER,in uppercase, to md5 and respective put_line does not print the following any output of the line(val1). In word 'Harbinder', what is there which is stopping the interpreter to print. It's strange!
declare
val varchar2(25);
val1 varchar2(25);
input varchar2(15) := 'HARBINDER';
begin
val :=dbms_obfuscation_toolkit.md5(input_string=>input);
val1 :=dbms_obfuscation_toolkit.md5(input_string=>'Harbinder');
dbms_output.put_line('Input: '||input||',Val: '||val|| ',Val1: '|| val1);
end;
OUTPUT:
Input: HARBINDER,Val: ¨
False
What can be the reason?

How to decrypt MD5

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