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<link title="Get" rel="Chapter" href="Get.html"><title>Ocamlnet 4 Reference Manual : Netmech_scram_gssapi</title>
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<h1>Module <a href="type_Netmech_scram_gssapi.html">Netmech_scram_gssapi</a></h1>
<pre><span id="MODULENetmech_scram_gssapi"><span class="keyword">module</span> Netmech_scram_gssapi</span>: <code class="code">sig</code> <a href="Netmech_scram_gssapi.html">..</a> <code class="code">end</code></pre><div class="info module top">
<div class="info-desc">
<p>The SCRAM security mechanism for GSS-API</p>
<p><b>This module needs the SHA-1 hash function. In order to use it,
initialize crypto support, e.g. by including the <code class="code">nettls-gnutls</code>
packages and calling <a href="Nettls_gnutls.html#VALinit"><code class="code">Nettls_gnutls.init</code></a>.</b></p>
</div>
</div>
<hr width="100%">
<p>See RFC 5802</p>
<pre><span id="VALscram_mech"><span class="keyword">val</span> scram_mech</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a></code></pre><div class="info ">
<div class="info-desc">
<p>The OID of SCRAM</p>
</div>
</div>
<pre><span id="TYPEclient_key_ring"><span class="keyword">class type</span> <a href="Netmech_scram_gssapi.client_key_ring-c.html">client_key_ring</a></span> = <code class="code">object</code> <a href="Netmech_scram_gssapi.client_key_ring-c.html">..</a> <code class="code">end</code></pre><div class="info">
<p>A <code class="code">client_key_ring</code> identifies the user on the client side</p>
</div>
<pre><span id="TYPEserver_key_verifier"><span class="keyword">class type</span> <a href="Netmech_scram_gssapi.server_key_verifier-c.html">server_key_verifier</a></span> = <code class="code">object</code> <a href="Netmech_scram_gssapi.server_key_verifier-c.html">..</a> <code class="code">end</code></pre><div class="info">
<p>A <code class="code">server_key_verifier</code> verifies on the server side that the users
exist and have the right authentication credentials</p>
</div>
<pre><span id="VALscram_gss_api"><span class="keyword">val</span> scram_gss_api</span> : <code class="type">?client_key_ring:<a href="Netmech_scram_gssapi.client_key_ring-c.html">client_key_ring</a> -><br> ?server_key_verifier:<a href="Netmech_scram_gssapi.server_key_verifier-c.html">server_key_verifier</a> -><br> <a href="Netmech_scram.html#TYPEprofile">Netmech_scram.profile</a> -> (module Netsys_gssapi.GSSAPI)</code></pre><div class="info ">
<div class="info-desc">
<p>Returns a standard-compliant GSS-API object for the passed SCRAM
profile. The object can be used on the client side for all
users whose passwords are available via <code class="code">client_key_ring</code>.
By default, the key ring is empty. On the server side, the object
authenticates all users whose credentials are available via
<code class="code">server_key_verifier</code>. By default, no user can be verified.</p>
<p>SCRAM only allows usernames of type <code class="code">NT_USER_NAME</code> for identifying
users.</p>
<p>For principals (servers), this SCRAM implementation allows identifiers
of type <code class="code">NT_HOSTBASED_SERVICE</code> and <code class="code">NT_USER_NAME</code>. Any such name
can be used, because the SCRAM protocol does not use principal
names. The contexts will always return the hostbased service "@" as
name of the principals.</p>
<p>This implementation checks whether the messages are verified and
unwrapped in the same order than generated, and reports this via the
<code class="code">`Unseq_token</code> and <code class="code">`Gap_token</code> flags. Support for true replay
detection (<code class="code">`Duplicate_token</code>) is not implemented, though.
Replayed tokens will also be marked as <code class="code">`Unseq_token</code>.</p>
</div>
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