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<title>Ocamlnet 4 Reference Manual : Netgssapi_support</title>
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<h1>Module <a href="type_Netgssapi_support.html">Netgssapi_support</a></h1>
<pre><span id="MODULENetgssapi_support"><span class="keyword">module</span> Netgssapi_support</span>: <code class="code">sig</code> <a href="Netgssapi_support.html">..</a> <code class="code">end</code></pre><div class="info module top">
<div class="info-desc">
<p>Support functions for GSS-API</p>
</div>
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<hr width="100%">
<pre><span id="VALoid_to_der"><span class="keyword">val</span> oid_to_der</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> -> string</code></pre><div class="info ">
<div class="info-desc">
<h3 id="2_Encodings">Encodings</h3></div>
</div>
<pre><span id="VALder_to_oid"><span class="keyword">val</span> der_to_oid</span> : <code class="type">string -> int Stdlib.ref -> <a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a></code></pre><div class="info ">
<div class="info-desc">
<p>Convert OID's to/from DER. <code class="code">der_to_oid</code> takes a cursor as second arg.</p>
</div>
</div>
<pre><span id="VALoid_to_der_value"><span class="keyword">val</span> oid_to_der_value</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> -> string</code></pre>
<pre><span id="VALder_value_to_oid"><span class="keyword">val</span> der_value_to_oid</span> : <code class="type">string -> int Stdlib.ref -> int -> <a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a></code></pre><div class="info ">
<div class="info-desc">
<p>Convert OID's to/from DER. This variant does not include the header
(hex 06 plus length). <code class="code">der_value_to_oid</code> takes a cursor and the length
in bytes.</p>
</div>
</div>
<pre><span id="VALwire_encode_token"><span class="keyword">val</span> wire_encode_token</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> -> <a href="Netsys_gssapi.html#TYPEtoken">Netsys_gssapi.token</a> -> string</code></pre>
<pre><span id="VALwire_decode_token"><span class="keyword">val</span> wire_decode_token</span> : <code class="type">string -> int Stdlib.ref -> <a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> * <a href="Netsys_gssapi.html#TYPEtoken">Netsys_gssapi.token</a></code></pre><div class="info ">
<div class="info-desc">
<p>Encode tokens as described in section 3.1 of RFC 2078. This is usually
only done for the initiating token.</p>
</div>
</div>
<pre><span id="VALencode_exported_name"><span class="keyword">val</span> encode_exported_name</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> -> string -> string</code></pre>
<pre><span id="VALdecode_exported_name"><span class="keyword">val</span> decode_exported_name</span> : <code class="type">string -> int Stdlib.ref -> <a href="Netsys_gssapi.html#TYPEoid">Netsys_gssapi.oid</a> * string</code></pre><div class="info ">
<div class="info-desc">
<p>Encode names as described in section 3.2 of RFC 2078</p>
</div>
</div>
<pre><span id="VALgs2_encode_saslname"><span class="keyword">val</span> gs2_encode_saslname</span> : <code class="type">string -> string</code></pre>
<pre><span id="VALgs2_decode_saslname"><span class="keyword">val</span> gs2_decode_saslname</span> : <code class="type">string -> string</code></pre><div class="info ">
<div class="info-desc">
<p>Encodes "," and "=" characters, and forbids null bytes, and checks
whether the names are UTF-8-encoded
(as required for the "saslname" production in section 4 of
RFC 5801). Fails if something is wrong.</p>
</div>
</div>
<pre><span id="VALparse_kerberos_name"><span class="keyword">val</span> parse_kerberos_name</span> : <code class="type">string -> string list * string option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">let (name_components, realm_opt) = parse_kerberos_name s</code>:
Returns the slash-separated name components as <code class="code">name_components</code>,
and the realm following "@" as <code class="code">realm_opt</code>.</p>
<p>Fails on parse error.</p>
</div>
</div>
<h3 id="2_Createtokens">Create tokens</h3><p>Format of the tokens: see RFC 4121</p>
<pre><span id="VALcreate_mic_token"><span class="keyword">val</span> create_mic_token</span> : <code class="type">sent_by_acceptor:bool -><br> acceptor_subkey:bool -><br> sequence_number:int64 -><br> get_mic:(<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> string) -><br> message:<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> string</code></pre><div class="info ">
<div class="info-desc">
<p>Create a MIC token:</p>
<ul>
<li><code class="code">sent_by_acceptor</code>: whether this token comes from the acceptor</li>
<li><code class="code">acceptor_subkey</code>: see RFC</li>
<li><code class="code">sequence_number</code>: a sequence number</li>
<li><code class="code">get_mic</code>: the checksum function
(e.g. <a href="Netmech_scram.Cryptosystem.html#VALget_mic"><code class="code">Netmech_scram.Cryptosystem.get_mic</code></a>)</li>
<li><code class="code">message</code>: the message to be signed</li>
</ul>
<p>The function returns the MIC token</p>
</div>
</div>
<pre><span id="VALparse_mic_token_header"><span class="keyword">val</span> parse_mic_token_header</span> : <code class="type">string -> bool * bool * int64</code></pre><div class="info ">
<div class="info-desc">
<p>Returns the triple
(<code class="code">sent_by_acceptor</code>, <code class="code">acceptor_subkey</code>, <code class="code">sequence_number</code>) from
the header of a MIC token that is passed to this function as
string. Fails if not parsable</p>
</div>
</div>
<pre><span id="VALverify_mic_token"><span class="keyword">val</span> verify_mic_token</span> : <code class="type">get_mic:(<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> string) -><br> message:<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> token:string -> bool</code></pre><div class="info ">
<div class="info-desc">
<p>Verifies the MIC <code class="code">token</code> with <code class="code">get_mic</code>, and returns true if the
verification is successful</p>
</div>
</div>
<pre><span id="VALcreate_wrap_token_conf"><span class="keyword">val</span> create_wrap_token_conf</span> : <code class="type">sent_by_acceptor:bool -><br> acceptor_subkey:bool -><br> sequence_number:int64 -><br> get_ec:(int -> int) -><br> encrypt_and_sign:(<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> <a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a>) -><br> message:<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> <a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a></code></pre><div class="info ">
<div class="info-desc">
<p>Wraps a <code class="code">message</code> so that it is encrypted and signed (confidential).</p>
<ul>
<li><code class="code">sent_by_acceptor</code>: whether this token comes from the acceptor</li>
<li><code class="code">acceptor_subkey</code>: see RFC</li>
<li><code class="code">sequence_number</code>: a sequence number</li>
<li><code class="code">get_ec</code>: This function returns the "extra count" number for
the size of the plaintext w/o filler (e.g. use
<a href="Netmech_scram.Cryptosystem.html#VALget_ec"><code class="code">Netmech_scram.Cryptosystem.get_ec</code></a>).</li>
<li><code class="code">encrypt_and_sign</code>: the encryption function from the cryptosystem.
The plaintext is passed to this function, and the ciphertext with
the appended signature must be returned in the string.</li>
<li><code class="code">message</code>: the payload message</li>
</ul>
<p>The function returns the token wrapping the message.</p>
</div>
</div>
<pre><span id="VALparse_wrap_token_header"><span class="keyword">val</span> parse_wrap_token_header</span> : <code class="type"><a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> bool * bool * bool * int64</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">let (sent_by_acceptor, sealed, acceptor_subkey, sequence_number) =
parse_wrap_token_header token</code></p>
<p>Fails if the <code class="code">token</code> cannot be parsed.</p>
</div>
</div>
<pre><span id="VALunwrap_wrap_token_conf"><span class="keyword">val</span> unwrap_wrap_token_conf</span> : <code class="type">decrypt_and_verify:(<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> <a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a>) -><br> token:<a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a> -> <a href="Netsys_gssapi.html#TYPEmessage">Netsys_gssapi.message</a></code></pre><div class="info ">
<div class="info-desc">
<p>Unwraps the <code class="code">token</code> using the decryption function
<code class="code">decrypt_and_verify</code> from the cryptosystem.</p>
<p>The functions fails if there is a format error, or the integrity
check fails.</p>
<p>Non-confidential messages cannot be unwrapped with this function.</p>
</div>
</div>
<p>Token functions for non-confidential messages are still missing</p>
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