https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&feed=atom&action=history
Projects/Alternative PRNG - Revision history
2024-03-28T18:38:19Z
Revision history for this page on the wiki
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https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&diff=3683&oldid=prev
Tsitkova at 17:58, 17 November 2010
2010-11-17T17:58:14Z
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Tsitkova
https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&diff=3681&oldid=prev
Tsitkova at 20:56, 2 November 2010
2010-11-02T20:56:25Z
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Tsitkova
https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&diff=3601&oldid=prev
Tsitkova at 04:22, 24 August 2010
2010-08-24T04:22:41Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 04:22, 24 August 2010</td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Define PRNG implementation during configuration process</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Define PRNG implementation during the configuration process. Yarrow-160 PRNG implementation should be the default one. One should use the flag ''--with-prng-algorithm'' to select the desired PRNG algorithm. For example, ''./configure --with-prng-algorithm=fortuna''. </div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>== <del class="diffchange diffchange-inline">Design</del> ==</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> typedef struct krb5_prng_provider {</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> char name[8];</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> krb5_error_code add_entropy(krb5_context , unsigned int, const krb5_data *);</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The public API related to PRNG stays unchanged: ''krb5int_prng_init, krb5_c_random_add_entropy, krb5_c_random_seed, krb5_c_random_make_octets, krb5_c_random_os_entropy''. However, the functional bodies are modified to control the use of the selected PRNG algorithm. The following is the typical example of this update: </div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> const struct krb5_prng_provider *prng = &krb5int_prng_fortuna;</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>One of the possibilities is to borrow the Fortuna implementation code that circulates under "Copyright (c) Marko Kreen" license. It works well with OpenSSL crypto backend. However, for the ''builtin'' crypto backend one would need to add SHA256 support to the native Kerberos crypto library.</div></td>
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<td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td>
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<td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># Define the place of PRNG module inside crypto library structure. Adjust build system accordingly.</div></td>
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<td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># Define the place of PRNG module inside crypto library structure. Adjust build system accordingly.</div></td>
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<td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># Evaluate the existing implementations of Fortuna PRNG. Adapt the appropriate code or implement Fortuna PRNG based on the design doc. This will require SHA2 addition.</div></td>
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<td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># Evaluate the existing implementations of Fortuna PRNG. Adapt the appropriate code or implement Fortuna PRNG based on the design doc. This will require SHA2 addition.</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Document basic instructions how to implement and plug<del class="diffchange diffchange-inline"> </del>in a new PRNG.</div></td>
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<td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># Document basic instructions how to implement and plug<ins class="diffchange diffchange-inline">-</ins>in a new PRNG.</div></td>
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Tsitkova
https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&diff=3079&oldid=prev
TomYu: Alternative PRNG moved to Projects/Alternative PRNG: move to Projects
2009-12-18T20:39:59Z
<p><a href="/wiki/Alternative_PRNG" class="mw-redirect" title="Alternative PRNG">Alternative PRNG</a> moved to <a href="/wiki/Projects/Alternative_PRNG" title="Projects/Alternative PRNG">Projects/Alternative PRNG</a>: move to Projects</p>
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<td colspan='1' style="background-color: white; color:black; text-align: center;">Revision as of 20:39, 18 December 2009</td>
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TomYu
https://k5wiki.kerberos.org/wiki?title=Projects/Alternative_PRNG&diff=3078&oldid=prev
Tsitkova: New page: {{project-early}} Current Kerberos implementation uses Yarrow-160 as a native PRNG. The goal of this project is to simplify the process of adoption of the alternative pseudorandom number...
2009-12-18T20:36:03Z
<p>New page: {{project-early}} Current Kerberos implementation uses Yarrow-160 as a native PRNG. The goal of this project is to simplify the process of adoption of the alternative pseudorandom number...</p>
<p><b>New page</b></p><div>{{project-early}}<br />
<br />
<br />
Current Kerberos implementation uses Yarrow-160 as a native PRNG. The goal of this project is to simplify the process of adoption of the alternative pseudorandom number generators such as HW accelerators, OS or any other cryptographically secure PRN generators that better suit the particular environment (depending on the type of hardware, system,configuration) and requirements (optimization, FIPS certification etc). <br />
<br />
<br />
== Functional Requirements ==<br />
<br />
* Define PRNG implementation during configuration process<br />
* Implement Fortuna PRNG<br />
<br />
<br />
== Design ==<br />
<br />
<br />
== Milestones ==<br />
<br />
# Define the place of PRNG module inside crypto library structure. Adjust build system accordingly.<br />
# Evaluate the existing implementations of Fortuna PRNG. Adapt the appropriate code or implement Fortuna PRNG based on the design doc. This will require SHA2 addition.<br />
# Document basic instructions how to implement and plug in a new PRNG.</div>
Tsitkova