I'm confused about this. I've been looking at the man page for the Linux crypt library as well as crypt.h and a hexdump of libcrypt.so. The Wikipedia article says libcrypt provides for several different ciphers and modes of operation, but I don't see any way of specifying these in the library. There's a generic crypt() function as well as a couple thread-safe versions and some functions for working with salts. How would you use hashing algorithms like bcrypt, MD5-Crypt, and SHA2-Crypt using this library? Am I misunderstanding what Linux crypt is? I thought Linux crypt provided those three hashing algorithms?

I was under the impression that libcrypt (part of glibc) dealt with password encryption (hashing).

Are you sure you're not looking for libcrypto, which is part of OpenSSL?

Yes, I am aware of the difference between libcrypt and libcrypto. My system has both files.

EDIT: I looked at the Wikipedia article I had up and it was actually for libgcrypt, which is part of GnuPG. I seem to have missed the G in the name. I don't know why DuckDuckGo would give me an article on libgcrypt when I searched for libcrypt.