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Using OpenBSD Problem-Solving Resources Let’s pick a common
Using OpenBSD Problem-Solving Resources Let’s pick a common question and use the OpenBSD resources to solve it. We’ll use several different methods to find an answer. One topic that comes up frequently is that of hardware-accelerated cryptography: how does it work, and what does OpenBSD do to support it? Here’s how you find information on this topic from each of the information sources the OpenBSD Project provides. www.OpenBSD.org If you look at the main page of the OpenBSD website, you’ll find a link pointing to “Integrated Crypto.” That leads you in turn to “Cryptographic Hardware Support.” Read, learn, and enjoy. Man Pages If you just type “man cryptography” you won’t get any matches; there is no “cryptography” man page. It’s frequently called “crypto,” however, and if you try “man crypto” you’ll get something. crypto(3) OpenSSL crypto(3) NAME crypto - OpenSSL cryptographic library SYNOPSIS DESCRIPTION The OpenSSL crypto library implements a wide range of cryptographic algorithms used in various Internet stan dards. The services provided by this library are used by the OpenSSL implementations of SSL, TLS and S/MIME, and they have also been used to implement SSH, OpenPGP, and other cryptographic standards. OVERVIEW libcrypto consists of a number of sub-libraries that … Well, that’s not what we want. It’s nice to have OpenSSL documentation on a system that includes OpenSSL, but it doesn’t answer our question. You might give up here, but that’s not what you want to do either. Notice that this manual this page falls in Section 3. Information on hardware belongs in Section 4 of the manual. When multiple man pages share a name, and you don’t give man(1) a section number, the page in the lowest section number is displayed. Try “apropos crypto” to look for all the man pages that include the word “crypto.” You’ll notice the following. … crypto (3) - OpenSSL cryptographic library crypto (4) - hardware crypto access driver crypto (9) - API for cryptographic services in the kernel … There are three different crypto man pages, each in a different section. Crypto(3) is for programmers who Page 30
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