title: Linux Crypto API and linux/crypto.h - Documentation
body: <p>I want to write a C program which makes use of the linux crypto-api for digital signatures. Unfortunately I cannot find good documentation about the linux api and the functions defined in linux/crypto.h (googling doesn't help, man pages for those functions don't exist). So now I wonder if anyone here can help me with a good link, a book would also be appreciated.</p>
  
  <p>2nd short question: All the time within this crypto stuff the term "tfm" comes up, as in a struct crypto_tfm or in functions, but I can't find out what tfm actually means.</p>