Annotation of www/crypto.html, Revision 1.146
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1.114 jufi 7: <title>Cryptography in OpenBSD</title>
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1.138 jcs 12: <a href="index.html"><img alt="[OpenBSD]" height="30" width="141" src="images/smalltitle.gif" border="0"></a>
13: <p>
14: <h2><font color="#e00000">Cryptography</font></h2>
15: <hr>
16:
1.114 jufi 17: <a name="why"></a>
18: <h3><font color="#e00000">Why do we ship cryptography?</font></h3><p>
1.32 deraadt 19:
20: In three words: <strong>because we can</strong>.<p>
21:
1.1 deraadt 22: The OpenBSD project is based in Canada.<p>
23:
1.114 jufi 24: The <a href="ECL.html">Export Control List of Canada</a>
1.23 deraadt 25: places no significant restriction on the export of
1.5 deraadt 26: cryptographic software, and is even more explicit about the free
27: export of freely-available cryptographic software. Marc Plumb has
28: done
1.116 nick 29: <a href="http://www.efc.ca/pages/doc/crypto-export.html">
1.31 aaron 30: some research to test the cryptographic laws</a>.
1.2 deraadt 31: <p>
1.1 deraadt 32:
1.3 deraadt 33: Hence the OpenBSD project has embedded cryptography into numerous places
34: in the operating system. We require that the cryptographic software we
1.114 jufi 35: use be <a href="policy.html">freely available and with good licenses</a>.
1.32 deraadt 36: We do not directly use cryptography with nasty patents.
1.13 deraadt 37: We also require that such software is from countries with useful export
1.16 deraadt 38: licenses because we do not wish to break the laws of any country.
39: <p>
1.7 deraadt 40:
1.87 brad 41: OpenBSD was the first operating system to ship with an IPsec stack.
1.102 brad 42: We've been including IPsec since the OpenBSD 2.1 release in 1997.
1.66 deraadt 43: <p>
44:
1.114 jufi 45: <a name="ssh"></a>
46: <h3><font color="#e00000">OpenSSH</font></h3><p>
1.39 louis 47:
1.55 deraadt 48: As of the 2.6 release, OpenBSD contains
1.50 provos 49: <a href="http://www.openssh.com/">OpenSSH</a>, an absolutely free and
1.128 david 50: patent unencumbered version of ssh.
1.55 deraadt 51: <a href="http://www.openssh.com/">OpenSSH</a> interoperated with ssh
52: version 1 and had many added features,
1.47 provos 53: <ul>
54: <li>
1.88 brad 55: all components of a restrictive nature (i.e., patents, see
1.146 ! beck 56: <a href="http://man.openbsd.org?query=ssl&sektion=8">ssl(8)</a>)
1.55 deraadt 57: had been directly removed from the source code; any licensed or
58: patented components used external libraries.
1.47 provos 59: <li>
1.55 deraadt 60: had been updated to support ssh protocol 1.5.
1.47 provos 61: <li>
1.55 deraadt 62: supported one-time password authentication with
1.146 ! beck 63: <a href="http://man.openbsd.org?query=skey&sektion=1">skey(1)</a>.
1.47 provos 64: </ul>
65: <p>
66:
1.93 deraadt 67: Roughly said, we took a free license release of ssh, OpenBSD-ifyed it.
68: About a year later, we extended OpenSSH to also do SSH 2 protocol, the
69: result being support for all 3 major SSH protocols: 1.3, 1.5, 2.0.
1.69 deraadt 70:
71: <p>
1.114 jufi 72: <a name="people"></a>
73: <h3><font color="#e00000">International Cryptographers Wanted</font></h3><p>
1.32 deraadt 74:
75: Of course, our project needs people to work on these systems. If any
76: non-American cryptographer who meets the constraints listed earlier is
77: interested in helping out with embedded cryptography in OpenBSD,
78: please contact us.<p>
79:
1.33 deraadt 80: <p>
1.114 jufi 81: <a name="papers"></a>
82: <h3><font color="#e00000">Further Reading</font></h3><p>
1.33 deraadt 83:
84: A number of papers have been written by OpenBSD team members, about
85: cryptographic changes they have done in OpenBSD. The postscript
1.34 deraadt 86: versions of these documents are available as follows.<p>
1.33 deraadt 87:
88: <ul>
1.43 deraadt 89: <li>A Future-Adaptable Password Scheme.<br>
1.114 jufi 90: <a href="events.html#usenix99">Usenix 1999</a>,
91: by <a href="mailto:provos@openbsd.org">Niels Provos</a>,
92: <a href="mailto:dm@openbsd.org">David Mazieres</a>.<br>
93: <a href="papers/bcrypt-paper.ps">paper</a> and
94: <a href="papers/bcrypt-slides.ps">slides</a>.
1.43 deraadt 95: <p>
96: <li>Cryptography in OpenBSD: An Overview.<br>
1.114 jufi 97: <a href="events.html#usenix99">Usenix 1999</a>,
98: by <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>,
99: <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a>,
100: <a href="mailto:art@openbsd.org">Artur Grabowski</a>,
101: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
102: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
103: <a href="papers/crypt-paper.ps">paper</a> and
104: <a href="papers/crypt-slides.ps">slides</a>.
1.62 niklas 105: <p>
106: <li>Implementing Internet Key Exchange (IKE).<br>
1.114 jufi 107: <a href="events.html#usenix2000">Usenix 2000</a>,
108: by <a href="mailto:niklas@openbsd.org">Niklas Hallqvist</a> and
109: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>.<br>
110: <a href="papers/ikepaper.ps">paper</a> and
111: <a href="papers/ikeslides.ps">slides</a>.
112: <p>
113: <li>Encrypting Virtual Memory.<br>
114: <a href="events.html#sec2000">Usenix Security 2000</a>,
115: <a href="mailto:provos@openbsd.org">Niels Provos</a>.<br>
1.128 david 116: <a href="papers/swapencrypt.ps">paper</a> and
1.114 jufi 117: <a href="papers/swapencrypt-slides.ps">slides</a>.
1.121 jason 118: <p>
119: <li>The Design of the OpenBSD Cryptographic Framework.<br>
120: <a href="events.html#usenix2003">Usenix 2003</a>, by
121: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
122: <a href="mailto:jason@openbsd.org">Jason L. Wright</a>, and
123: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
124: <a href="papers/ocf.pdf">paper</a>.
1.133 steven 125: <p>
1.132 jason 126: <li>Cryptography As an Operating System Service: A Case Study.<br>
1.133 steven 127: <a href="http://www.acm.org/tocs/">ACM Transactions on Computer Systems</a>,
1.132 jason 128: February 2006, by
129: <a href="mailto:angelos@openbsd.org">Angelos D. Keromytis</a>,
130: <a href="mailto:jason@openbsd.org">Jason L. Wright</a>, and
131: <a href="mailto:deraadt@openbsd.org">Theo de Raadt</a>.<br>
132: <a href="papers/crypt-service.pdf">paper</a>.
1.33 deraadt 133: </ul>
1.1 deraadt 134:
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136: </html>
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