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- <div class="section" id="keytab-file-format">
-<span id="id1"></span><h1>Keytab file format<a class="headerlink" href="#keytab-file-format" title="Permalink to this headline">¶</a></h1>
-<p>There are two versions of the file format used by the FILE keytab
-type. The first byte of the file always has the value 5, and the
-value of the second byte contains the version number (1 or 2).
-Version 1 of the file format uses native byte order for integer
-representations. Version 2 always uses big-endian byte order.</p>
-<p>After the two-byte version indicator, the file contains a sequence of
-signed 32-bit record lengths followed by key records or holes. A
-positive record length indicates a valid key entry whose size is equal
-to or less than the record length. A negative length indicates a
-zero-filled hole whose size is the inverse of the length. A length of
-0 indicates the end of the file.</p>
-<div class="section" id="key-entry-format">
-<h2>Key entry format<a class="headerlink" href="#key-entry-format" title="Permalink to this headline">¶</a></h2>
-<p>A key entry may be smaller in size than the record length which
-precedes it, because it may have replaced a hole which is larger than
-the key entry. Key entries use the following informal grammar:</p>
-<div class="highlight-python"><div class="highlight"><pre>entry ::=
- principal
- timestamp (32 bits)
- key version (8 bits)
- enctype (16 bits)
- key length (16 bits)
- key contents
- key version (32 bits) [in release 1.14 and later]
-
-principal ::=
- count of components (16 bits) [includes realm in version 1]
- realm (data)
- component1 (data)
- component2 (data)
- ...
- name type (32 bits) [omitted in version 1]
-
-data ::=
- length (16 bits)
- value (length bytes)
-</pre></div>
-</div>
-<p>The 32-bit key version overrides the 8-bit key version. To determine
-if it is present, the implementation must check that at least 4 bytes
-remain in the record after the other fields are read, and that the
-value of the 32-bit integer contained in those bytes is non-zero.</p>
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- <h2>On this page</h2>
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-<li><a class="reference internal" href="#">Keytab file format</a><ul>
-<li><a class="reference internal" href="#key-entry-format">Key entry format</a></li>
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