Encrypt/decrypt mem card

hi, just got E71 a week ago..having trouble with the encryption key so i tried deleting the key file in file manager and now i tried creating a new code and now getting incorrect key file. how can i use the memory card again without doing a reformat on the card?
badly needed your help guys!
Thanks,
Eman

I encrypted my memory card and now that I want to put it on it says ¨memory card encrypted with another key. To decrypt it, import its key. Importing the new key will destroy the curent key in driver. Contnue?¨ I press yes and then it says No Keys Found... hen when I try to put the phone memory off it says ¨To encrypt phone memory it is highly recommended to enable Äutolock¨ and let lock code in ¨Phone andSIM card¨ settings to prevent unuthorized access.¨.
I then enable autolockand then I try to ock the pone and SIM card , then the phone autolock period and it asks me for the code and it says its incorrect
what can I do, should I cnge of SIM card? Help!

Similar Messages

Encrypt & decrypt memory card

how can i do decryption  of a memory card in nokia E66 model..
can u tell the procedure ...
i already encrypt the card now i cant acces the card ie cant open music file ,images etc...

The process varies according to your OS release on the device, but check Options > Security > General Settings and set your password and see what options you have there. You should find one for encryption to include the media card.
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Is possible the encrypt decrypt operation in JCDE plugin for Eclipse

I am new in java card.
We are still in a LONG wait for the JCOP tools. In the meantime we are trying another tools and we have found I this JCDE plugin for Eclipse.
I try to work one sample but I have a problem. To create applet problem.
Is the problem in sample or is JCDE plugin not support encrypt decrypt operation?
Actually is this possible to signing , hashing operation in JCDE as similation.
Please answer.
I take this error:
Exception from the invoked install() method:public static void handsonRSAEncryptDecrypt.HandsonRSAEncryptDecrypt.install(byte[],short,byte)
The sample is
package handsonRSAEncryptDecrypt;
import javacard.framework.*;
import javacard.security.*;
import javacardx.crypto.Cipher;
* Jeffrey C
* 6/21/08
public class HandsonRSAEncryptDecrypt extends javacard.framework.Applet
     //globals
     RSAPrivateCrtKey rsa_PrivateCrtKey;
     RSAPublicKey rsa_PublicKey;
     KeyPair rsa_KeyPair;
     Cipher cipherRSA;
     final short dataOffset = (short) ISO7816.OFFSET_CDATA;
     //constructor
     private HandsonRSAEncryptDecrypt(byte bArray[], short bOffset, byte bLength)
          //generate own rsa_keypair
rsa_KeyPair = new KeyPair( KeyPair.ALG_RSA_CRT, KeyBuilder.LENGTH_RSA_1024 );
rsa_KeyPair.genKeyPair();
          rsa_PublicKey = (RSAPublicKey) rsa_KeyPair.getPublic();
          rsa_PrivateCrtKey = (RSAPrivateCrtKey) rsa_KeyPair.getPrivate();
          cipherRSA = Cipher.getInstance(Cipher.ALG_RSA_PKCS1, false);
          register(bArray, (short) (bOffset + 1), bArray[bOffset]);
     //install
     public static void install(byte bArray[], short bOffset, byte bLength)
          new HandsonRSAEncryptDecrypt(bArray, bOffset, bLength);
     public void process(APDU apdu)
          if (selectingApplet())
               return;
          byte[] buf = apdu.getBuffer();
          if (buf[ISO7816.OFFSET_CLA] != 0) ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
          if (buf[ISO7816.OFFSET_INS] != (byte) (0xAA)) ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
          switch (buf[ISO7816.OFFSET_P1])
          case (byte) 0x01:
               encryptRSA(apdu);
               return;
          case (byte) 0x02:
               decryptRSA(apdu);
               return;
          default:
               ISOException.throwIt(ISO7816.SW_WRONG_P1P2);
     private void encryptRSA(APDU apdu)
          byte a[] = apdu.getBuffer();
          short byteRead = (short) (apdu.setIncomingAndReceive());
          cipherRSA.init(rsa_PrivateCrtKey, Cipher.MODE_ENCRYPT);
          short cyphertext = cipherRSA.doFinal(a, (short) dataOffset, byteRead, a, (short) dataOffset);
          // Send results
          apdu.setOutgoing();
          apdu.setOutgoingLength((short) cyphertext);
          apdu.sendBytesLong(a, (short) dataOffset, (short) cyphertext);
//     private void decryptRSA(APDU apdu)
//          byte a[] = apdu.getBuffer();
//          short byteRead = (short) (apdu.setIncomingAndReceive());
//          cipherRSA.init(rsa_PublicKey, Cipher.MODE_DECRYPT);
//          cipherRSA.doFinal(a, (short) dataOffset, byteRead, a, (short) dataOffset);
//          // Send results
//          apdu.setOutgoing();
//          apdu.setOutgoingLength((short) 24);
//          apdu.sendBytesLong(a, (short) dataOffset, (short) 24);
     private void decryptRSA(APDU apdu)
          byte a[] = apdu.getBuffer();
          short byteRead = (short) (apdu.setIncomingAndReceive());
          cipherRSA.init(rsa_PublicKey, Cipher.MODE_DECRYPT);
          short textlenth = cipherRSA.doFinal(a, (short) dataOffset, byteRead, a, (short) dataOffset);
          // Send results
          apdu.setOutgoing();
          apdu.setOutgoingLength((short) textlenth );
          apdu.sendBytesLong(a, (short) dataOffset, (short) textlenth );
script
powerup;
// Select the installer applet
0x00 0xA4 0x04 0x00 0x09 0xa0 0x00 0x00 0x00 0x62 0x03 0x01 0x08 0x01 0x7F;
// create HandsonRSAEncryptDecrypt applet
0x80 0xB8 0x00 0x00 0xd 0xb 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x00 0x00 0x00 0x7F;
powerdown;
output
Received ATR = 0x3b 0xf0 0x11 0x00 0xff 0x00
CLA: 00, INS: a4, P1: 04, P2: 00, Lc: 09, a0, 00, 00, 00, 62, 03, 01, 08, 01, Le: 00, SW1: 90, SW2: 00
CLA: 80, INS: b8, P1: 00, P2: 00, Lc: 0d, 0b, 01, 02, 03, 04, 05, 06, 07, 08, 09, 00, 00, 00, Le: 00, SW1: 64, SW2: 44
Thanks for help.

I think you should try and get error manner for solving problem.
Allah yardimcin olsun ne diyeyim.

E72 cannot install on sd after encrypt/decrypt act...

Hi,
after encrypting my strorage card I switched mind, because of decreasing performance. Decryption worked fine, accept for the fact that the name of the SD card. This was stil unreadable, but I could change it. So far so good, but now two things don't work anymore:
- first, when downloading an application I cannot not install it on the SD card, it simply says "Cannot install"
- second, when I want to change a profile eg. select different sound, an "opening..." screen opens, but nothing further
Is there a way to fully recover the SD card to it's original settings, the way Nokia provided it?
I only own this phone a week, not so happy at this moment (Outlook calendar screwed)
Thanks for help!
regards,
Tom

I did 3 encryption/decryption cycles on my E72 (with a 16 GB microSD) and have not had such problems installing apps or changing profiles. Something went wrong.
If you have access to the card you might consider copying the data to a PC, reformat it (eventually hard reset the E72) and then copy it back (making sure you backed up contacts and calendar).

I have a Mac Mini, and it won't accept connecting my Sony video camera. So I got a SD mem card reader to unload my movies from. It worked the first time I used it a few months ago. This time it says it doesn't recognize the format I am trying to use?

I have all thenecessary updates. I have switched over from a PC to Mac back in April and have nad nothing but problems adapting. I don't know why this worked the first time, and put my videos inti imovie, and now it doesn't recognize it at all. And the Mem card reader does work, because I just put the SD card from my regular camera into it and it downloaded those fine, it just won't take my movies!

Which sony camera? I have a Sony HDR-CX550 right now and have been able to use the SD card as well as connect the camera directly. I also had CX110 that work too. You may want to try to copy the complete top level folder from the SD card to the Hard drive, then try to "import from Camera archive" and select that folder.

Encryption/Decryption failure for pdf and MSWord files

Hi,
Is there anybody to help me to find out what is wrong with my class (listing below)? I am sucessfuly using this class to encrypt and decrypt txt, html files but for unknown reasons I am unable to use it for e.g. pdf files. The encrypion somehow works but any atempt to decrypt is a failure.
/* This class accepts an input file, encrypts/decrypts it using DES algorithm and
writes the encrypted/decrypted output to an output file. DES is used in Cipher
Block Chaining mode with PKCS5Padding padding scheme. Note that DES is a symmetric
block cipher that uses 64-bit keys for encryption. A password of length no less
than 8 is to be passed to the encryptFile/ decryptFile methods. This password is
used to generate the encryption key. All exception handling is to be done by
calling methods. These exceptions are thrown by encryptFile/ decryptFile methods.
The input buffer is 64 bytes, 8 times the key size.
import java.io.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.*;
import java.security.spec.*;
public class Crypto
public Crypto(FileInputStream inStream_, FileOutputStream outStream_)
fInputStream_ = inStream_;
fOutputStream_ = outStream_;
public void encryptFile(String password_) throws InvalidKeySpecException, InvalidKeyException,
InvalidAlgorithmParameterException, IllegalStateException, IOException, Exception
DataOutputStream dataOutStream_ = new DataOutputStream(fOutputStream_);
// key generation
SecretKey encryptKey_ = createEncryptionKey(password_);
// Cipher initialization
Cipher cipher_= Cipher.getInstance(cipherType);
cipher_.init(Cipher.ENCRYPT_MODE, encryptKey_);
// write initialization vector to output
byte[] initializationVector_ = cipher_.getIV();
dataOutStream_.writeInt(initializationVector_.length);
dataOutStream_.write(initializationVector_);
// start reading from input and writing encrypted data to output
while (true) {
inputLength_ = fInputStream_.read(input_);
if (inputLength_ ==-1) break;
byte[] output_ = cipher_.update(input_, inputOffset_, inputLength_);
if (output_ != null)
dataOutStream_.write(output_);
// finalize encryption and wrap up
byte[] output_ = cipher_.doFinal();
if (output_ != null)
dataOutStream_.write(output_);
fInputStream_.close();
dataOutStream_.flush();
dataOutStream_.close();
public void decryptFile(String password_) throws IllegalStateException, IOException, Exception
DataInputStream dataInStream_ = new DataInputStream(fInputStream_);
// key generation
SecretKey encryptKey_ = createEncryptionKey(password_);
// read initialization vector from input
int ivSize_ = dataInStream_.readInt();
byte[] initializationVector_ = new byte[ivSize_];
dataInStream_.readFully(initializationVector_);
IvParameterSpec ivParamSpec_= new IvParameterSpec(initializationVector_);
// Cipher initialization
Cipher cipher_= Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher_.init(Cipher.DECRYPT_MODE, encryptKey_, ivParamSpec_);
// start reading from input and writing decrypted data to output
while (true) {
inputLength_ = fInputStream_.read(input_);
if (inputLength_ ==-1) break;
byte[] output_ = cipher_.update(input_, inputOffset_, inputLength_);
if (output_ != null)
fOutputStream_.write(output_);
// finalize decryption and wrap up
byte[] output_ = cipher_.doFinal();
if (output_ != null)
fOutputStream_.write(output_);
fInputStream_.close();
fOutputStream_.flush();
fOutputStream_.close();
// the following method creates the encryption key using the supplied password
private SecretKey createEncryptionKey(String passwd_) throws InvalidKeySpecException,
InvalidKeyException, NoSuchAlgorithmException
byte[] encryptionKeyData_ = passwd_.getBytes();
DESKeySpec encryptionKeySpec_ = new DESKeySpec(encryptionKeyData_);
SecretKeyFactory keyFactory_ = SecretKeyFactory.getInstance(algorithm_);
SecretKey encryptionKey_ = keyFactory_.generateSecret(encryptionKeySpec_);
return encryptionKey_;
private FileInputStream fInputStream_;
private FileOutputStream fOutputStream_;
private final String algorithm_= "DES";
private final String cipherType= "DES/CBC/PKCS5Padding";
private byte[] input_ = new byte[64]; // The input buffer size is 64
private int inputLength_;
private final int inputOffset_= 0;
}

Please can u give me refined code for me///
at [email protected]
Hi,
I found at least one thing wrong. In the decrypt
method you are reading from 'fInputStream_' rather
than 'dataInStream'.
Worked for me on MSWord after changing this!
Roger
// start reading from input and writing decrypted
ted data to output
while (true) {
inputLength_ = fInputStream_.read(input_);
if (inputLength_ ==-1) break;
byte[] output_ = cipher_.update(input_,
input_, inputOffset_, inputLength_);
if (output_ != null)
fOutputStream_.write(output_);

How to resolve bug RC4 encrypt-decrypt on iPAD with AIR15 only

Hi everybody,
I have some trouble with AIR15 only, In the past, I created a small game on iPad It could send or receive messge from server. I used lib as3crypto.swc encrypt or decrypt message (RC4). But when I upgrade to AIR15 encrypt-decrypt cannot work ( Another thing about this crash is that it only happens with a release (adhoc or appstore) build but NOT with a debug build). I check so many time but i don't know what is problem here.
Please help me, thanks so much any advice.
P/S: My game have many swf files (code and resource). I must combine multiple SWF files into one.
Class RC4.as
import com.hurlant.crypto.prng.ARC4;
import com.hurlant.util.Base64;
import com.hurlant.util.Hex;
import flash.utils.ByteArray;
public class RC4
private static const key:String = "keytest";
private static var byteKeys:ByteArray = Hex.toArray(Hex.fromString(key));
private static var rc4:ARC4 = new ARC4();
public static function encrypt(clearText:String):String
var byteText:ByteArray = Hex.toArray(Hex.fromString(clearText));
rc4.init(byteKeys);
rc4.encrypt(byteText);
return Base64.encodeByteArray(byteText);
public static function decrypt(encryptedText:String):String
var byteText:ByteArray = Base64.decodeToByteArray(encryptedText);
rc4.init(byteKeys);
rc4.decrypt(byteText);
return Hex.toString(Hex.fromArray(byteText));

Sorry, exact message is "this movie could not be played".
There are hundreds of posts about this message but no one states a clear solution to the problem.
Your help will be much appreciated.
Thank you.

Help ! Need PCI Encryption/Decryption Controller Driver for New HP 355 G2 (AMD) w/Win 7 Pro 64 Bit

Just rebuilt new HP 355 G2 to Win 7 64 bit. The ONLY driver I can not locate or get to work is the PCI Encryption/Decryption Controller. I installed all latest drivers for this model/OS from both HP and AMD sites still no luck. AMD autodetect utility and Catalyst software installed all other drivers successfully except this one and when completes says all drivers, including chipset, are installed successfully and current.
I am at a complete loss where to get this driver from a OEM site, can you help ?
Device ID's:
PCI\VEN_1022&DEV_1537&SUBSYS_15371022&REV_00
PCI\VEN_1022&DEV_1537&SUBSYS_15371022
PCI\VEN_1022&DEV_1537&CC_108000
PCI\VEN_1022&DEV_1537&CC_1080
Thanks !!!
This question was solved.
View Solution.

Hi:
You need to run this driver and then manually install it.
http://h20565.www2.hp.com/hpsc/swd/public/detail?swItemId=vc_133833_1
To manually install the driver go to the device manager and click on the PCI Encryption/Decryption Controller needing the driver.
Click on the driver tab. Click on Update Driver.
Select the Browse my computer for driver software option, and browse to the driver folder that was created when you ran the file.
That folder will be located in C:\SWSetup\sp66974.
Make sure the Include Subfolders box is checked, and the driver should install.
Then reboot.

Help for a newbie on encryption/decryption

I want to start with a text file.
Read in a line of ascii characters, encrypt it using some algorithm and output it as a new set of ascii characters.
What algorithm should I use?

thanks a lot. I got the encryption/decryption working pretty easily.
However, I ran into problem when I got to storing keys:
I stored it fine with this code
          try {
               KeyGenerator keyGen = KeyGenerator.getInstance("DES");
               desKey = keyGen.generateKey();
               cipher = Cipher.getInstance("DES");
               KeyStore keyStore = KeyStore.getInstance("JKS");
               String password = "lemein";
               char passwd[] = password.toCharArray();
               keyStore.load(null, passwd); //initialize keyStore
               Certificate[] chain = new Certificate[1];
               String alias = "test";
               keyStore.setKeyEntry(alias, desKey, passwd, null);
               String fileName = "data/gkey.txt";
               FileOutputStream f = new FileOutputStream(fileName);
               keyStore.store(f, passwd); // <----------exception happens here
          } catch (Exception e)
          {     e.printStackTrace();
I got problem when I retrieve it with this code
          KeyGenerator kg = null;
          Key key = null;
          cipher = null;
          Security.addProvider(new com.sun.crypto.provider.SunJCE());
          byte[] result = null;
          try {
               KeyStore keyStore = KeyStore.getInstance("JKS");
               keyStore.load(new FileInputStream("data/gkey.txt"), "lemein".toCharArray());
               key = keyStore.getKey("test", "lemein".toCharArray());
               cipher = Cipher.getInstance("DES");
               byte[] data = "Hello World!".getBytes();
               System.out.println("Original data : " + new String(data));
               cipher.init(Cipher.ENCRYPT_MODE, key);
               result = cipher.doFinal(data);
               System.out.println("Encrypted data: " + new String(result));
          } catch (Exception e) {
               e.printStackTrace();
I get the error:
java.security.UnrecoverableKeyException: DerInputStream.getLength(): lengthTag=75, too big.
     at sun.security.provider.KeyProtector.recover(Unknown Source)
     at sun.security.provider.JavaKeyStore.engineGetKey(Unknown Source)
     at java.security.KeyStore.getKey(Unknown Source)
Any idea what the problem is?
Thanks

Encrypt/decrypt using update

Hi,
can someone give me an encrypt/decrypt pair of code samples that use the cipher.update() call.
i am trying it like that but apparently it doesn't work
byte[] temp = new byte[message.length/2];
byte[] temp2 = new byte[message.length/2];
System.arraycopy(message, 0, temp, 0, temp.length);
System.arraycopy(message, temp.length, temp2, 0, temp.length);
ciphertext = new byte[message.length];
System.arraycopy(symmetricCipher.update(temp), 0, ciphertext, 0, temp.length);
System.arraycopy(symmetricCipher.doFinal(temp2), 0, ciphertext, temp.length, temp.length);

ode]
>
I don't see how using the inputstream i would avoid
the memory error, when passing anything over
10,000,000. Unless you mean I split the input, and
write small chunks into disk as I encrypt them?Your basic problem is that you have the data as one large array. I don't know how and why you created this large array; I would not to create it unless there was no other way.
Since it does not make sense to create one large encrypted byte array and given that you have a byte array then you can use either
1) Create a ByteArrayInputStream and wrap it in a CipherinputStream. This would allow you to encrypt the array in a sequential manner a few KBytes at a time.
or
2) Encrypt the array a few KBytes at a time using a simple update(array, start, length) that returns the encrypted bytes.
But first, I would try to avoid creating the large 'cleartext' array.

Encrypt/decrypt AES 256, vorsalt error

Hiyas.
So I'm trying to get encrypt/decrypt to work for AES 256, with both 32byte key and 32byte IVorSalt. (Yup-new java security files v6 installed)
'IF' I 32byte key but dont use a IV at all, I get a nice looking AES 256 result. (I can tell it's AES 256 by looking the length of the encrypted string)
'IF' I use a 32byte key and 16bit salt, I get a AES 128 result (I know- as per docs theyre both s'posed to the same size, but the docs are wrong).
But when i switch to using both a 32byte key AND a 32byte salt I get the error below.
An error occurred while trying to encrypt or decrypt your input string: Bad parameters: invalid IvParameterSpec: com.rsa.jsafe.crypto.JSAFE_IVException: Invalid IV length. Should be 16.
Has anyone 'EVER' gotten encrypt to work for them using AES 256 32byte key and 32byte salt? Is this a bug in CF? Or Java? Or I am doing something wrong?

<cfset theAlgorithm = "Rijndael/CBC/PKCS5Padding" />
<cfset gKey = "hzj+1o52d9N04JRsj3vTu09Q8jcX+fNmeyQZSDlZA5w=">

<cfset theIV    = BinaryDecode("7fe8585328e9ac7b7fe8585328e9ac7b7fe8585328e9ac7b7fe8585328e9ac7b","hex")>

<cffunction    name="DoEncrypt" access="public" returntype="string" hint="Fires when the application is first created.">
    <cfargument    name="szToEncrypt" type="string" required="true"/>
    <cfset secretkey = gKey>
    <cfset szReturn=encrypt(szToEncrypt, secretkey, theAlgorithm, "Base64", theIV)>
    <cfreturn szReturn>
</cffunction>
<cffunction    name="DoDecrypt" access="public" returntype="string" hint="Fires when the application is first created.">
    <cfargument    name="szToDecrypt" type="string" required="true"/>
    <cfset secretkey = gKey>
    <cfset szReturn=decrypt(szToDecrypt, secretkey, theAlgorithm, "Base64",theIV)>
    <cfreturn szReturn>
</cffunction>
<cfset szStart = form["toencrypt"]>
<cfset szStart = "Test me!">
<cfset szEnc = DoEncrypt(szStart)>
<cfset szDec = DoDecrypt(szEnc)>
<cfoutput>#szEnc# #szDec#</cfoutput>

Hi edevmachine,
This Bouncy Castle Encryption CFC supports Rijndael w/ 256-bit block size. (big thanks to Jason here and all who helped w/ that, btw!)
Example:
<cfscript>
BouncyCastleCFC = new path.to.BouncyCastle();
string = "ColdFusion Rocks!";
key = binaryEncode(binaryDecode(generateSecretKey("Rijndael", 256), "base64"), "hex");//the CFC takes hex'd key
ivSalt = binaryEncode(binaryDecode(generateSecretKey("Rijndael", 256), "base64"), "hex");//the CFC takes hex'd ivSalt
encrypted = BouncyCastleCFC.doEncrypt(string, key, ivSalt);
writeOutput(BouncyCastleCFC.doDecrypt(encrypted, key, ivSalt));
</cfscript>
Related links for anyone interested in adding 256-bit block size Rijndael support into ColdFusion:
- An explanation of how to install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files into ColdFusion
- An explanation of how to install the Bouncy Castle Crypto package into ColdFusion (near bottom, under the "Installing additional security providers" heading)
- An explanation of how to connect the Bouncy Castle classes together
- Bouncy Castle's doc for the Rijndael Engine
And here is the full CFC as posted in the StackOverflow discussion:
<cfcomponent displayname="Bounce Castle Encryption Component" hint="This provides bouncy castle encryption services" output="false">
<cffunction name="createRijndaelBlockCipher" access="private">
    <cfargument name="key" type="string" required="true" >
    <cfargument name="ivSalt" type="string" required="true" >
    <cfargument name="bEncrypt" type="boolean" required="false" default="1">
    <cfargument name="blocksize" type="numeric" required="false" default=256>
    <cfscript>
    // Create a block cipher for Rijndael
    var cryptEngine = createObject("java", "org.bouncycastle.crypto.engines.RijndaelEngine").init(arguments.blocksize);
    // Create a Block Cipher in CBC mode
    var blockCipher = createObject("java", "org.bouncycastle.crypto.modes.CBCBlockCipher").init(cryptEngine);
    // Create Padding - Zero Byte Padding is apparently PHP compatible.
    var zbPadding = CreateObject('java', 'org.bouncycastle.crypto.paddings.ZeroBytePadding').init();
    // Create a JCE Cipher from the Block Cipher
    var cipher = createObject("java", "org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher").init(blockCipher,zbPadding);
    // Create the key params for the cipher
    var binkey = binarydecode(arguments.key,"hex");
    var keyParams = createObject("java", "org.bouncycastle.crypto.params.KeyParameter").init(BinKey);
    var binIVSalt = Binarydecode(ivSalt,"hex");
    var ivParams = createObject("java", "org.bouncycastle.crypto.params.ParametersWithIV").init(keyParams, binIVSalt);
    cipher.init(javaCast("boolean",arguments.bEncrypt),ivParams);
    return cipher;
    </cfscript>
</cffunction>
<cffunction name="doEncrypt" access="public" returntype="string">
    <cfargument name="message" type="string" required="true">
    <cfargument name="key" type="string" required="true">
    <cfargument name="ivSalt" type="string" required="true">
    <cfscript>
    var cipher = createRijndaelBlockCipher(key=arguments.key,ivSalt=arguments.ivSalt);
    var byteMessage = arguments.message.getBytes();
    var outArray = getByteArray(cipher.getOutputSize(arrayLen(byteMessage)));
    var bufferLength = cipher.processBytes(byteMessage, 0, arrayLen(byteMessage), outArray, 0);
    var cipherText = cipher.doFinal(outArray,bufferLength);
    return toBase64(outArray);
    </cfscript>
</cffunction>
<cffunction name="doDecrypt" access="public" returntype="string">
    <cfargument name="message" type="string" required="true">
    <cfargument name="key" type="string" required="true">
    <cfargument name="ivSalt" type="string" required="true">
    <cfscript>
    var cipher = createRijndaelBlockCipher(key=arguments.key,ivSalt=arguments.ivSalt,bEncrypt=false);
    var byteMessage = toBinary(arguments.message);
    var outArray = getByteArray(cipher.getOutputSize(arrayLen(byteMessage)));
    var bufferLength = cipher.processBytes(byteMessage, 0, arrayLen(byteMessage), outArray, 0);
    var originalText = cipher.doFinal(outArray,bufferLength);
    return createObject("java", "java.lang.String").init(outArray);
    </cfscript>
</cffunction>
<cfscript>
function getByteArray(someLength)
    byteClass = createObject("java", "java.lang.Byte").TYPE;
    return createObject("java","java.lang.reflect.Array").newInstance(byteClass, someLength);
</cfscript>
</cfcomponent>
Thanks!,
-Aaron

Encrypt / Decrypt password

Hi
I'm new in Java and I need to create a function to encrypt / decrypt passwords using the Blowfish algorithm. I know how to create a key, but I don't know how to recover it to decrypt the password.
Another question, Is it possible to use public/private keys in this case???.
Can you give some links or examples please???
Regards
J.C.

This is typically done either one of two ways:
1) PBE based encryption. This uses a password or pass phrase to derive
a key to use with a symmetric algorithm.
2) Asymmetric using something like RSA. Typically RSA is used to wrap
the actual symmetric key used to do the encryption but for very short
plaintext it can be used directly on the plaintext. Passwords are a
good example of short plaintext.
Obviously symmetric encryption is a great deal faster than asymmetric
encryption. So if your plaintext was large you would want to use
symmetric. Also Asymmetric encryption is length dependant. AKA if your
public key's modulus is 1024 bits then you could encrypt any plaintext
that was 121 bytes or shorter.
PBE takes a salt (a random byte array) and an iteration count and
hashes a passphrase with the salt iteration number of times to generate
a key that can be reproduced over and over again and used with a
symmetric algorithm. The issue here is that your salt/ic either need
to be hard coded and reused or the values for any single encryption
need to be saved along with the ciphertext. Using the same ic/salt for
a large number of plaintext to ciphertext operations can lead to a
weakening of the pass phrase (aka the key) and aids a cryptoanalyst in
breaking the code. Although it is still difficult it becomes easier
with each successive encryption.
Its upto you which route you take but you should note that private keys
used in asymmetric encryption use PBE to keep them private anyway so in
a sense if you use asymmetric encryption you are really using both
asymmetric encryption and PBE...

Encrypt/decrypt

Hello!
I have been trying to use this syntax for encrypting/decrypting BUT I get different values all the time even if I use the same String. I would be really glad if anyone could help me to tell me why. What I want to use this encrypt/decrypt/ is to make some info unreadable in my database but I want to be able to decrypt the info.
-----------------------------syntax----------------------------------------------------------------------
SecretKey key=null;
try{
key = KeyGenerator.getInstance("DES").generateKey();
}catch(Exception e){}
DesEncrypter d= new DesEncrypter(key);
-----------------------------My cryptClass--------------------------------------------------------
public class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
DesEncrypter(SecretKey key) {
try {
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
public String encrypt(String str) {
try {
// Encode the string into bytes using utf-8
byte[] utf8 = str.getBytes("UTF8");
// Encrypt
byte[] enc = ecipher.doFinal(utf8);
// Encode bytes to base64 to get a string
return new sun.misc.BASE64Encoder().encode(enc);
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (java.io.IOException e) {
return null;
public String decrypt(String str) {
try {
// Decode base64 to get bytes
byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
// Decrypt
byte[] utf8 = dcipher.doFinal(dec);
// Decode using utf-8
return new String(utf8, "UTF8");
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (java.io.IOException e) {
return null;
thanks in advance!

I don't understand caffeiene's answer but maybe it will help you. It seems to me that you need to encrypt and decrypt the same way across application sessions, etc. Therefore you will need to store your key outside of the application in a file on the server. So you'll have to use a key generator that will let you save the key to a file. That's about all the detail I can give you since I've never worked directly with cryptography. Obviously you'll need to make sure the server is behind a good firewall, or whatever other security measures you deem appropriate to protect the key. It seems unsecure, but you have to persist the key, because otherwise if the app server crashes then the data in the db will be inaccessible.

Encrypt/Decrypt data, multiple public keys using Bouncy castle api?

Hi all.
I need to implement encrypt/decrypt functionality of some data with many public keys using bouncy castle api and EnvelopedData class in java 1.4 SE.
Could someone give me examples how to do it. I searched whole the internet and i could not find simple example.

Hi thanks very much.
I had a quick look at the examples. I will see if they could help me.
Here is more specific what i want:
Encrypt data with multiple public keys that are kept in .pkcs12 file.
And decrypt the data using coresponding private key after that.
I must use bouncy castle api for java 1.4 se.
Best regards
Edited by: menchev on Nov 13, 2008 8:26 AM

Encrypt/decrypt streams with same password

Hi all!
I'would like to know if I can encrypt/decrypt streams using key's which are hardwired in my application. By a hardwired key I understand a key which is generated using the same seed; practically I don't keep the key, but the minimum info to regenerate it.
Is this possible and if yes, how? Where can I find some more info about regenerating a key?
Stefan.
PS: I'm a newbie in field of cryptography, so...

You can use password-based encryption. See an example
of such a thing in:
http://javaalmanac.com/egs/javax.crypto/PassKey.html
Erm, what sort of encryption isn't password-based ?

Encrypt/decrypt mem card

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