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I have tried to find tutorials about encryption based purely on own developed code.
For example in Java you have the javax.crypto package, in C# you have the Windows.Security.Cryptography dll. However I am trying to find a tutorial how to encrypt data with bits/bytes without using predefined classes/dll.
Does anyone know where and if there are such tutorials?
It is very unwise to develop your own encryption algorithms. It might be useful only as a school exercise. Otherwise it could be dangerous!
However, if you really have to do it on your own, have a look at some existing source code as inspiration:
https://www.bouncycastle.org/
or read the technical specification of the cipher you want to implement, AES for example:
http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
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I would like to use a 0-1 integer programming solver as a tool in a java program. I cannot find anything easy to use on the web. I tried the pseudo-boolean library from sat4j but this is not well documented, some classes are not consistent with their description in the API (some methods signature are different).
Would you have any suggestion?
GLPK, open-source package for LP and (mixed) ILP has Java binding.
Another open-source solvers are lp_solve (Java API) and SCIP.
There are also commercial solvers - CPLEX, GUROBI and Mosek, all with Java interface.
Btw. for my homeworks, I found Python and PuLP a bit easier to work with :)
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I am working on a big project with a complex codebase written in java. I want to understand a particular piece of code and i thought getting a sequence diagram of the entry point method would give me a good idea. I use intelliJ and i looked for a plugin which could do this and i found 'SequencePlugin' but unfortunately it is not working in intelliJ 8.1.4. Can i achieve what i am trying to in any other way? Is there a standard approach to follow when trying to understand a complex codebase other than by debugging?
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I just came across TrueLicense Project API for licensing Java projects. I want to know are there any other similar APIs available? Please suggest me some.
Also I am not familiar with the process of generating the keystore which is needed for this. Can anyone guide me about the process of generating .store file which is used in this API?
Thanks.
Following is the link where steps are provided to generate provate and public key stores using java keytool.
http://technologytriumph.blogspot.in/2012/10/steps-to-generate-public-priavet-key.html
Truelicense is a good option as per my view.
I just tried jLicense and it worked fine for me. I tested the GUI which creates the license keys and then ran the test to test the license.
http://freecode.com/projects/jlicense
http://www.websina.com/products/jlicense.html
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Are there any fuzzer libraries out there for Java?
I'd like to sprinkle fuzzing capabilities into existing Java web-based automated integration tests. I've done a lot of searching but I'm coming up empty for a library that supports HTTP/S. There are a lot of Python tools, but I'd like to stick with Java since that's what the programmers are using.
JBroFuzz essentially has the fuzzing capabilities I need, but I need an API and they haven't released one yet.
A quick search turned up the javafuzz library.
The people with JBroFuzz have made it possible to use it as a library:
http://www.owasp.org/index.php/OWASP_JBroFuzz_Tutorial#How_to_Use_JBroFuzz_as_a_Fuzzing_Library
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I am looking for an implementation of the Rabin Hash Function in Java, Can anyone recommend a fast library?
Update:
I've just tested the library here.
It takes ~2200ms to hash 1mm random urls on my 2GHz processor.
This is certainly good enough for my needs, however I will test another library when I get a monent and post the results here.
Here's my Java implementation.
http://code.google.com/p/rabinfingerprint/
It also includes arbitrarily large irreducible polynomials (using BigIntegers).
I've not used it myself, but you can try the Rabin Hash Function project on Source Forge.