Examples to Encrypt / decrypt Strings like passwords

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If you are experiencing an issue please mention the full platform your issue applies to:
IDE: NetBeans/Eclipse/IDEA NetBeans 8.2
Desktop OS Windows 10
Simulator 7.3
Device Android & IOS

Looking to encrypt/decrypt Strings in Codename1 similar to Java package org.jasypt.util.text (StandardPBEStringEncryptor)

I have reviewed https://www.codenameone.com/blog/seamless-storage-encryption.html

Have installed bouncy castle cn1lib

Have installed EncryptedStorage.install(inc.KEY);

However am not understanding how to implement encryption & decryption of Strings

The Example referenced https://www.codenameone.com/blog/seamless-storage-encryption.html

Looks like it is related only to File System storage.

Thoughts?

Regards

[Shai Almog]

It's related to storage in Storage. Bouncy castle has a HUGE API for encryption of various types so this is a bit vague. You need to be more specific on the encryption type.

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OK, I am hardly an expert on encryption, so please forgive my ignorance.

I want to encrypt/decrypt a String like password etc.

In my Swing application I use org.jasypt.encryption.pbe.StandardPBEStringEncryptor

Ideally I would like to use a compatible cypher in codename1.

• Algorithm: PBEWithMD5AndDES.
• Key obtention iterations: 1000.

1. Create an instance (using new).
2. Set a password (using setPassword(String) or setPasswordCharArray(char[])).
3. Perform the desired encrypt(String) or decrypt(String) operations.

• The required steps to use it are:  http://www.jasypt.org/api/jasypt/1.8/org/jasypt/util/text/BasicTextEncryptor.html

Can you point me in the direction of full examples of implementing this?

Regards

[Shai Almog]

This uses SHA1 for encoding: https://stackoverflow.com/questions/38673149/how-to-hash-data-with-custom-key-using-sha1digest-algorithm-in-codenameone/38680719#38680719

You can probably replace SHA1 with MD5Digest to get the same result for MD5. There are several classes with PBE too but this requires digging in deeper into the code.

[shop.servic...@gmail.com]

Sorry, This is not helpful.

I have looked at the examples @ http://www.bouncycastle.org/documentation.html

However several Classes they use are not found in the BouncyCastleCN1Lib therefore won't link

Can someone point me to complete code examples that will encrypt/decrypt MD5 that compiles with 

BouncyCastleCN1Lib ?

Regards.

[Shai Almog]

The bouncy castle libs are based on the old J2ME version of bouncy castle. You can probably google the encryption you want and J2ME to find code samples.

[shop.servic...@gmail.com]

Not much luck, example after example does no compile for one method not being supported in Cosenameone or another.

Is there not anyone in a codenameone user group that uses this library and can share some working code?

Regards.

On Saturday, September 2, 2017 at 2:02:57 AM UTC-4, Shai Almog wrote:

[Shai Almog]

Lots of people use this library but because it's so versatile everyone uses it differently. I'm unclear on what doesn't work for you?

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I don't see any complete examples.

If there are lots of people using it, how can I get to se people and ask for sample usages.

My challenge is the examples I have tried do not link generally use java classes not supported in codename1.

Can you please point me to complete code samples?

Regards.

[Shai Almog]

The examples are only blocks and hence complete. I'm not sure what sort of example you would expect? 

[shop.servic...@gmail.com]

An example the shows what libs to import, exactly what methods to call to encrypt a "Hello World" String, Print out the Ascii String, then decrypt the encrypted String, print it out.

Examples that demonstrate the DES encryption etc.

Unfortunately this is not intuitive for me and ask for your help in providing a complete runnable example.

Regards

On Monday, September 4, 2017 at 12:18:25 AM UTC-4, Shai Almog wrote:

[Shai Almog]

Import is pretty easy in an IDE, the community support can only go so far as I personally handle anywhere from 300 to 500 emails per day...

We do need better docs for a lot of cn1libs including this one but unfortunately we don't have them. We need the communities help in improving these docs: https://www.codenameone.com/blog/tip-edit-docs-fun-profit.html