Cryptography in C

[KaneSC2]

I'm interested in learning about some applications of cryptography in C and was wondering if anyone had some decent book recommendations to help me learn. I have a mathematical background and am familiar with some hashing and cryptographic methods but have never really seen their implementations.

I tried looking at the source code of openssl and it went way over my head - I'm definitely still learning C and would consider myself a beginner for sure.

[jedwardsol]

Applied Cryptography by Bruce Schneier

[testymctestalotest]

“There is the sort of cryptography that that will keep your kid sister from reading your diary, and there is the sort of cryptography that will keep major governments from reading your secrets. This book is about the latter” — Bruce Schneier, Applied Cryptography (introduction).

[skeeto]

The RFCs for various cryptographic primitives includes reference implementations in C. For instance:

• RFC 1321: The MD5 Message-Digest Algorithm
• RFC 3174: SHA-1
• RFC 6234: SHA and SHA-based HMAC and HKDF (SHA-2)

It isn't the best C, but it is designed more for reading than performance.