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</pre><pre class='rust '>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>;

<span class='kw'>use</span> <span class='ident'>nid</span>::<span class='ident'>Nid</span>;

<span class='doccomment'>/// Type-only version of the `Extension` enum.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See the `Extension` documentation for more information on the different</span>
<span class='doccomment'>/// variants.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>,<span class='ident'>Hash</span>,<span class='ident'>PartialEq</span>,<span class='ident'>Eq</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>ExtensionType</span> {
    <span class='ident'>KeyUsage</span>,
    <span class='ident'>ExtKeyUsage</span>,
    <span class='ident'>SubjectAltName</span>,
    <span class='ident'>IssuerAltName</span>,
    <span class='ident'>OtherNid</span>(<span class='ident'>Nid</span>),
    <span class='ident'>OtherStr</span>(<span class='ident'>String</span>),
}

<span class='doccomment'>/// A X.509 v3 certificate extension.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// Only one extension of each type is allow in a certificate.</span>
<span class='doccomment'>/// See RFC 3280 for more information about extensions.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>Extension</span> {
    <span class='doccomment'>/// The purposes of the key contained in the certificate</span>
    <span class='ident'>KeyUsage</span>(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>KeyUsageOption</span><span class='op'>&gt;</span>),
    <span class='doccomment'>/// The extended purposes of the key contained in the certificate</span>
    <span class='ident'>ExtKeyUsage</span>(<span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>ExtKeyUsageOption</span><span class='op'>&gt;</span>),
    <span class='doccomment'>/// Subject Alternative Names</span>
    <span class='ident'>SubjectAltName</span>(<span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='ident'>AltNameOption</span>, <span class='ident'>String</span>)<span class='op'>&gt;</span>),
    <span class='doccomment'>/// Issuer Alternative Names</span>
    <span class='ident'>IssuerAltName</span>(<span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='ident'>AltNameOption</span>, <span class='ident'>String</span>)<span class='op'>&gt;</span>),
    <span class='doccomment'>/// Arbitrary extensions by NID. See `man x509v3_config` for value syntax.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// You must not use this to add extensions which this enum can express directly.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// ```</span>
    <span class='doccomment'>/// use openssl::x509::extension::Extension::*;</span>
    <span class='doccomment'>/// use openssl::nid::Nid;</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # let generator = openssl::x509::X509Generator::new();</span>
    <span class='doccomment'>/// generator.add_extension(OtherNid(Nid::BasicConstraints,&quot;critical,CA:TRUE&quot;.to_owned()));</span>
    <span class='doccomment'>/// ```</span>
    <span class='ident'>OtherNid</span>(<span class='ident'>Nid</span>, <span class='ident'>String</span>),
    <span class='doccomment'>/// Arbitrary extensions by OID string. See `man ASN1_generate_nconf` for value syntax.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// You must not use this to add extensions which this enum can express directly.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// ```</span>
    <span class='doccomment'>/// use openssl::x509::extension::Extension::*;</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # let generator = openssl::x509::X509Generator::new();</span>
    <span class='doccomment'>/// generator.add_extension(OtherStr(&quot;2.999.2&quot;.to_owned(),&quot;ASN1:UTF8:example value&quot;.to_owned()));</span>
    <span class='doccomment'>/// ```</span>
    <span class='ident'>OtherStr</span>(<span class='ident'>String</span>, <span class='ident'>String</span>),
}

<span class='kw'>impl</span> <span class='ident'>Extension</span> {
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>get_type</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>ExtensionType</span> {
        <span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>KeyUsage</span>(_) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>KeyUsage</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>ExtKeyUsage</span>(_) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>ExtKeyUsage</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>SubjectAltName</span>(_) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>SubjectAltName</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>IssuerAltName</span>(_) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>IssuerAltName</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>OtherNid</span>(<span class='ident'>nid</span>, _) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>OtherNid</span>(<span class='ident'>nid</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>OtherStr</span>(<span class='kw-2'>ref</span> <span class='ident'>s</span>, _) <span class='op'>=&gt;</span> <span class='ident'>ExtensionType</span>::<span class='ident'>OtherStr</span>(<span class='ident'>s</span>.<span class='ident'>clone</span>()),
        }
    }
}

<span class='kw'>impl</span> <span class='ident'>ExtensionType</span> {
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>get_nid</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>Nid</span><span class='op'>&gt;</span> {
        <span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>KeyUsage</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>Nid</span>::<span class='ident'>KeyUsage</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>ExtKeyUsage</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>Nid</span>::<span class='ident'>ExtendedKeyUsage</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>SubjectAltName</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>Nid</span>::<span class='ident'>SubjectAltName</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>IssuerAltName</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>Nid</span>::<span class='ident'>IssuerAltName</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>OtherNid</span>(<span class='ident'>nid</span>) <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>nid</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>OtherStr</span>(_) <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>,
        }
    }

    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>get_name</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='kw-2'>&amp;</span><span class='ident'>str</span><span class='op'>&gt;</span> {
        <span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>ExtensionType</span>::<span class='ident'>OtherStr</span>(<span class='kw-2'>ref</span> <span class='ident'>s</span>) <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>s</span>),
            _ <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>,
        }
    }
}

<span class='comment'>// FIXME: This would be nicer as a method on Iterator&lt;Item=ToString&gt;. This can</span>
<span class='comment'>// eventually be replaced by the successor to std::slice::SliceConcatExt.connect</span>
<span class='kw'>fn</span> <span class='ident'>join</span><span class='op'>&lt;</span><span class='ident'>I</span>: <span class='ident'>Iterator</span><span class='op'>&lt;</span><span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>T</span><span class='op'>&gt;</span>, <span class='ident'>T</span>: <span class='ident'>ToString</span><span class='op'>&gt;</span>(<span class='ident'>iter</span>: <span class='ident'>I</span>, <span class='ident'>sep</span>: <span class='kw-2'>&amp;</span><span class='ident'>str</span>) <span class='op'>-&gt;</span> <span class='ident'>String</span> {
    <span class='ident'>iter</span>.<span class='ident'>enumerate</span>().<span class='ident'>fold</span>(<span class='ident'>String</span>::<span class='ident'>new</span>(), <span class='op'>|</span><span class='kw-2'>mut</span> <span class='ident'>acc</span>, (<span class='ident'>idx</span>, <span class='ident'>v</span>)<span class='op'>|</span> {
        <span class='kw'>if</span> <span class='ident'>idx</span> <span class='op'>&gt;</span> <span class='number'>0</span> {
            <span class='ident'>acc</span>.<span class='ident'>push_str</span>(<span class='ident'>sep</span>)
        };
        <span class='ident'>acc</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&amp;</span><span class='ident'>v</span>.<span class='ident'>to_string</span>());
        <span class='ident'>acc</span>
    })
}

<span class='kw'>impl</span> <span class='ident'>ToString</span> <span class='kw'>for</span> <span class='ident'>Extension</span> {
    <span class='kw'>fn</span> <span class='ident'>to_string</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>String</span> {
        <span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>KeyUsage</span>(<span class='kw-2'>ref</span> <span class='ident'>purposes</span>) <span class='op'>=&gt;</span> <span class='ident'>join</span>(<span class='ident'>purposes</span>.<span class='ident'>iter</span>(), <span class='string'>&quot;,&quot;</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>ExtKeyUsage</span>(<span class='kw-2'>ref</span> <span class='ident'>purposes</span>) <span class='op'>=&gt;</span> <span class='ident'>join</span>(<span class='ident'>purposes</span>.<span class='ident'>iter</span>(), <span class='string'>&quot;,&quot;</span>),
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>SubjectAltName</span>(<span class='kw-2'>ref</span> <span class='ident'>names</span>) <span class='op'>=&gt;</span> {
                <span class='ident'>join</span>(<span class='ident'>names</span>.<span class='ident'>iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='kw-2'>&amp;</span>(<span class='kw-2'>ref</span> <span class='ident'>opt</span>, <span class='kw-2'>ref</span> <span class='ident'>val</span>)<span class='op'>|</span> <span class='ident'>opt</span>.<span class='ident'>to_string</span>() <span class='op'>+</span> <span class='string'>&quot;:&quot;</span> <span class='op'>+</span> <span class='kw-2'>&amp;</span><span class='ident'>val</span>),
                     <span class='string'>&quot;,&quot;</span>)
            }
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>IssuerAltName</span>(<span class='kw-2'>ref</span> <span class='ident'>names</span>) <span class='op'>=&gt;</span> {
                <span class='ident'>join</span>(<span class='ident'>names</span>.<span class='ident'>iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='kw-2'>&amp;</span>(<span class='kw-2'>ref</span> <span class='ident'>opt</span>, <span class='kw-2'>ref</span> <span class='ident'>val</span>)<span class='op'>|</span> <span class='ident'>opt</span>.<span class='ident'>to_string</span>() <span class='op'>+</span> <span class='string'>&quot;:&quot;</span> <span class='op'>+</span> <span class='kw-2'>&amp;</span><span class='ident'>val</span>),
                     <span class='string'>&quot;,&quot;</span>)
            }
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>OtherNid</span>(_, <span class='kw-2'>ref</span> <span class='ident'>value</span>) <span class='op'>=&gt;</span> <span class='ident'>value</span>.<span class='ident'>clone</span>(),
            <span class='kw-2'>&amp;</span><span class='ident'>Extension</span>::<span class='ident'>OtherStr</span>(_, <span class='kw-2'>ref</span> <span class='ident'>value</span>) <span class='op'>=&gt;</span> <span class='ident'>value</span>.<span class='ident'>clone</span>(),
        }
    }
}

<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>,<span class='ident'>Copy</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>KeyUsageOption</span> {
    <span class='ident'>DigitalSignature</span>,
    <span class='ident'>NonRepudiation</span>,
    <span class='ident'>KeyEncipherment</span>,
    <span class='ident'>DataEncipherment</span>,
    <span class='ident'>KeyAgreement</span>,
    <span class='ident'>KeyCertSign</span>,
    <span class='ident'>CRLSign</span>,
    <span class='ident'>EncipherOnly</span>,
    <span class='ident'>DecipherOnly</span>,
}

<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>KeyUsageOption</span> {
    <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span>(), <span class='ident'>fmt</span>::<span class='ident'>Error</span><span class='op'>&gt;</span> {
        <span class='ident'>f</span>.<span class='ident'>pad</span>(<span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>DigitalSignature</span> <span class='op'>=&gt;</span> <span class='string'>&quot;digitalSignature&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>NonRepudiation</span> <span class='op'>=&gt;</span> <span class='string'>&quot;nonRepudiation&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>KeyEncipherment</span> <span class='op'>=&gt;</span> <span class='string'>&quot;keyEncipherment&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>DataEncipherment</span> <span class='op'>=&gt;</span> <span class='string'>&quot;dataEncipherment&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>KeyAgreement</span> <span class='op'>=&gt;</span> <span class='string'>&quot;keyAgreement&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>KeyCertSign</span> <span class='op'>=&gt;</span> <span class='string'>&quot;keyCertSign&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>CRLSign</span> <span class='op'>=&gt;</span> <span class='string'>&quot;cRLSign&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>EncipherOnly</span> <span class='op'>=&gt;</span> <span class='string'>&quot;encipherOnly&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>KeyUsageOption</span>::<span class='ident'>DecipherOnly</span> <span class='op'>=&gt;</span> <span class='string'>&quot;decipherOnly&quot;</span>,
        })
    }
}

<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>ExtKeyUsageOption</span> {
    <span class='ident'>ServerAuth</span>,
    <span class='ident'>ClientAuth</span>,
    <span class='ident'>CodeSigning</span>,
    <span class='ident'>EmailProtection</span>,
    <span class='ident'>TimeStamping</span>,
    <span class='ident'>MsCodeInd</span>,
    <span class='ident'>MsCodeCom</span>,
    <span class='ident'>MsCtlSign</span>,
    <span class='ident'>MsSgc</span>,
    <span class='ident'>MsEfs</span>,
    <span class='ident'>NsSgc</span>,
    <span class='doccomment'>/// An arbitrary key usage by OID.</span>
    <span class='ident'>Other</span>(<span class='ident'>String</span>),
}

<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>ExtKeyUsageOption</span> {
    <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span>(), <span class='ident'>fmt</span>::<span class='ident'>Error</span><span class='op'>&gt;</span> {
        <span class='ident'>f</span>.<span class='ident'>pad</span>(<span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>ServerAuth</span> <span class='op'>=&gt;</span> <span class='string'>&quot;serverAuth&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>ClientAuth</span> <span class='op'>=&gt;</span> <span class='string'>&quot;clientAuth&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>CodeSigning</span> <span class='op'>=&gt;</span> <span class='string'>&quot;codeSigning&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>EmailProtection</span> <span class='op'>=&gt;</span> <span class='string'>&quot;emailProtection&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>TimeStamping</span> <span class='op'>=&gt;</span> <span class='string'>&quot;timeStamping&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>MsCodeInd</span> <span class='op'>=&gt;</span> <span class='string'>&quot;msCodeInd&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>MsCodeCom</span> <span class='op'>=&gt;</span> <span class='string'>&quot;msCodeCom&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>MsCtlSign</span> <span class='op'>=&gt;</span> <span class='string'>&quot;msCTLSign&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>MsSgc</span> <span class='op'>=&gt;</span> <span class='string'>&quot;msSGC&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>MsEfs</span> <span class='op'>=&gt;</span> <span class='string'>&quot;msEFS&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>NsSgc</span> <span class='op'>=&gt;</span> <span class='string'>&quot;nsSGC&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>ExtKeyUsageOption</span>::<span class='ident'>Other</span>(<span class='kw-2'>ref</span> <span class='ident'>s</span>) <span class='op'>=&gt;</span> <span class='kw-2'>&amp;</span><span class='ident'>s</span>[..],
        })
    }
}

<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>AltNameOption</span> {
    <span class='doccomment'>/// The value is specified as OID;content. See `man ASN1_generate_nconf` for more information on the content syntax.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// ```</span>
    <span class='doccomment'>/// use openssl::x509::extension::Extension::*;</span>
    <span class='doccomment'>/// use openssl::x509::extension::AltNameOption::Other as OtherName;</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # let generator = openssl::x509::X509Generator::new();</span>
    <span class='doccomment'>/// generator.add_extension(SubjectAltName(vec![(OtherName,&quot;2.999.3;ASN1:UTF8:some other name&quot;.to_owned())]));</span>
    <span class='doccomment'>/// ```</span>
    <span class='ident'>Other</span>,
    <span class='ident'>Email</span>,
    <span class='ident'>DNS</span>,
    <span class='comment'>// X400, // Not supported by OpenSSL</span>
    <span class='ident'>Directory</span>,
    <span class='comment'>// EDIParty, // Not supported by OpenSSL</span>
    <span class='ident'>URI</span>,
    <span class='ident'>IPAddress</span>,
    <span class='ident'>RegisteredID</span>,
}

<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>AltNameOption</span> {
    <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span>(), <span class='ident'>fmt</span>::<span class='ident'>Error</span><span class='op'>&gt;</span> {
        <span class='ident'>f</span>.<span class='ident'>pad</span>(<span class='kw'>match</span> <span class='self'>self</span> {
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>Other</span> <span class='op'>=&gt;</span> <span class='string'>&quot;otherName&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>Email</span> <span class='op'>=&gt;</span> <span class='string'>&quot;email&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>DNS</span> <span class='op'>=&gt;</span> <span class='string'>&quot;DNS&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>Directory</span> <span class='op'>=&gt;</span> <span class='string'>&quot;dirName&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>URI</span> <span class='op'>=&gt;</span> <span class='string'>&quot;URI&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>IPAddress</span> <span class='op'>=&gt;</span> <span class='string'>&quot;IP&quot;</span>,
            <span class='kw-2'>&amp;</span><span class='ident'>AltNameOption</span>::<span class='ident'>RegisteredID</span> <span class='op'>=&gt;</span> <span class='string'>&quot;RID&quot;</span>,
        })
    }
}
</pre>
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