What is the best encryption library in C / C ++?

Question

What is the best encryption library in C / C ++ In terms of:

• entropy
• quality
• ease of use
• readability
• portability
• performance

What is your favorite and why do you like it?

Answer 1

We have successfully used OpenSSL . Portable, standards compliant and easy to use.

Answer 2

I have used CryptoPP in the past ( http://www.cryptopp.com/ ), and although its API style and programming paradigms are a bit used, I liked it at the end. It provides a wide range of symmetric and asymmetric algorithms with great flexibility. The documentation is that there are API documents, but there is a small "high-level" overview and a simple code example. I ended up puzzling pieces of code from across the network. It was easy to integrate into my project (statically linked). I am using MSVC - 2003, when I started using it, now I switched to 2008. It is portable across multiple platforms (check the website). I always used RNG by default, I don’t know which one.

Answer 3

I need to go with LibTomCrypt . He often overlooked OpenSSL, but TomCrypt is simply lightweight and simple. In terms of quality, TomCrypt is widely used as high-quality encryption. In addition, this license is publicly available, which helps to avoid problems with the attribution of your documentation that BSD licenses give you when writing commercial software.

Answer 4

My favorite GNU library:

libgcrypt

Performance is good and EVERYWHERE used it, so it is very well tested.

Answer 5

Crypto ++ seems to have a very good reputation.

Wikipedia - https://en.wikipedia.org/wiki/Crypto%2B%2B

GitHub - https://github.com/weidai11/cryptopp

Answer 6

The C ++ version has not yet been released, but goolge KeyCzar http://code.google.com/p/keyczar/ may be worth a look. No matter what you say about your business, they have many smart programmers working for them.

Answer 7

GPGme . Easy to use and compatible with OpenPGP format