asked on

How to work with JAVA crypto to encrypt a file/ a string

Hi Experts,
I am work on crypto to encrypt file and string,
I know java has supported crypto API but I don't know details about this and how to use
Can you help me to give some suggestion/examble that is using JAVA crypto to encrypt/decrypt a file and a string with DES-EDE2 or others

Thanks in advance

CEHJ

See http://www.exampledepot.com/egs/javax.crypto/PassKey.html and related examples

Mick Barry

http://www.exampledepot.com/egs/javax.crypto/DesFile.html

Mick Barry

and the follwoing

http://www.devx.com/Java/10MinuteSolution/21385/1954?pf=true

Mobinex

ASKER

Thank for all help,
I will try to work with http://www.exampledepot.com/egs/javax.crypto
For http://www.devx.com/Java/10MinuteSolution/21385/1954?pf=true I knew this, but it can not descrypt my string that I encrypt from other crypto library.

Can you all help again with below question:
String encryptedString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

Can you know what Encryption Scheme/Crypto Algorithm Name? (this string is encrypted from crypto C++ library version 5.0 using DefaultCrypto)

I used http://www.devx.com/Java/10MinuteSolution/21385/1954?pf=true to decrypt with DES, DES-EDE2 but it has problem with block invalide (javax.crypto.BadPaddingException)

Many thank again.

ASKER CERTIFIED SOLUTION

Bart Cremers

membership

Create a free account to see this answer

Signing up is free and takes 30 seconds. No credit card required.

See answer

Mobinex

ASKER

Can you help to write java program that use crypto encrypt/descrypt library to descrypt below string:

String encrypted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

with key is: String key ="TEST";

Mobinex

ASKER

Hi Experts
Do you know how to use crypto for JAVA and C++, I mean I need to use JAVA program to encrypt and C++ to descypt.

As I know crypto in C++ we can use crypto++ library, and for Java we have crypto library too.
But I don't know how to use compatible between C++ and JAVA.
Can you let me know some suggestion?

Thank in advance!