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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>MD5</title>
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<td><a accesskey="p" href="gnet-pack.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
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</tr>
<tr><td colspan="5" class="shortcuts"><nobr><a href="#id391036" class="shortcut">Top</a>
                  &#160;|&#160;
                  <a href="#id391700" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="gnet-md5"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id391036"></a><span class="refentrytitle">MD5</span>
</h2>
<p>MD5 &#8212; MD5 hash</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">

#include &lt;gnet.h&gt;


                    <a href="gnet-md5.html#GMD5:CAPS">GMD5</a>;
#define             <a href="gnet-md5.html#GNET-MD5-HASH-LENGTH:CAPS">GNET_MD5_HASH_LENGTH</a>
<a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               <a href="gnet-md5.html#gnet-md5-new">gnet_md5_new</a>                        (const gchar *buffer,
                                                         guint length);
<a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               <a href="gnet-md5.html#gnet-md5-new-string">gnet_md5_new_string</a>                 (const gchar *str);
<a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               <a href="gnet-md5.html#gnet-md5-clone">gnet_md5_clone</a>                      (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);
void                <a href="gnet-md5.html#gnet-md5-delete">gnet_md5_delete</a>                     (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);
<a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               <a href="gnet-md5.html#gnet-md5-new-incremental">gnet_md5_new_incremental</a>            (void);
void                <a href="gnet-md5.html#gnet-md5-update">gnet_md5_update</a>                     (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5,
                                                         const gchar *buffer,
                                                         guint length);
void                <a href="gnet-md5.html#gnet-md5-final">gnet_md5_final</a>                      (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);
gboolean            <a href="gnet-md5.html#gnet-md5-equal">gnet_md5_equal</a>                      (gconstpointer p1,
                                                         gconstpointer p2);
guint               <a href="gnet-md5.html#gnet-md5-hash">gnet_md5_hash</a>                       (gconstpointer p);
gchar*              <a href="gnet-md5.html#gnet-md5-get-digest">gnet_md5_get_digest</a>                 (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);
gchar*              <a href="gnet-md5.html#gnet-md5-get-string">gnet_md5_get_string</a>                 (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);
void                <a href="gnet-md5.html#gnet-md5-copy-string">gnet_md5_copy_string</a>                (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5,
                                                         gchar *buffer);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id391700"></a><h2>Description</h2>
<p>
The MD5 module provide support for computing and manipulating MD5
hashes.  MD5 is a hash function with a very low probability of
collision.  MD5 is considered weaker than SHA.
</p>
<p>
An MD5 can be calculated at one time or incrementally.  To create a
MD5 at one time, call <a href="gnet-md5.html#gnet-md5-new"><code class="function">gnet_md5_new()</code></a> with the data.  To create a MD5
incrementally, call <a href="gnet-md5.html#gnet-md5-new-incremental"><code class="function">gnet_md5_new_incremental()</code></a> to create the MD5
object, then <a href="gnet-md5.html#gnet-md5-update"><code class="function">gnet_md5_update()</code></a> one or more times with data to hash,
and finally call <a href="gnet-md5.html#gnet-md5-final"><code class="function">gnet_md5_final()</code></a>.
</p>
<p>
To get the digest, or hash value, call <a href="gnet-md5.html#gnet-md5-get-digest"><code class="function">gnet_md5_get_digest()</code></a>.  This
returns the raw digest as an array of <a href="gnet-md5.html#GNET-MD5-HASH-LENGTH:CAPS"><code class="literal">GNET_MD5_HASH_LENGTH</code></a> bytes.  To
get the digest as a human-readable hexidecimal string, call
<a href="gnet-md5.html#gnet-md5-get-string"><code class="function">gnet_md5_get_string()</code></a> or <a href="gnet-md5.html#gnet-md5-copy-string"><code class="function">gnet_md5_copy_string()</code></a>.
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
gchar buffer[] = "Hello world!";
gchar buffer2[] = "Second line";
GMD5*  md5;
gchar* md5_str;

/* Compute an MD5 at one time */
md5 = gnet_md5_new (buffer, strlen(buffer));

md5_str = gnet_md5_get_string (md5);
g_print ("The MD5 of %s is %s\n", buffer, md5_str);

/* Use MD5... */

g_free (md5_str);
gnet_md5_delete (md5);

/* Compute an MD5 incrementally */
md5 = gnet_md5_new_incremental ();
gnet_md5_update (md5, buffer, strlen(buffer));
gnet_md5_update (md5, buffer2, strlen(buffer2));
gnet_md5_final (md5);

/* Use MD5... */

gnet_md5_delete (md5);
</pre></div>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id391825"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id391834"></a><h3>
<a name="GMD5:CAPS"></a>GMD5</h3>
<a class="indexterm" name="id391847"></a><pre class="programlisting">typedef struct _GMD5 GMD5;</pre>
<p>
GMD5 is a MD5 hash.</p>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id391865"></a><h3>
<a name="GNET-MD5-HASH-LENGTH:CAPS"></a>GNET_MD5_HASH_LENGTH</h3>
<a class="indexterm" name="id391878"></a><pre class="programlisting">#define GNET_MD5_HASH_LENGTH	16
</pre>
<p>
Length of the MD5 hash in bytes.</p>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id391896"></a><h3>
<a name="gnet-md5-new"></a>gnet_md5_new ()</h3>
<a class="indexterm" name="id391909"></a><pre class="programlisting"><a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               gnet_md5_new                        (const gchar *buffer,
                                                         guint length);</pre>
<p>
Creates a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a> from <em class="parameter"><code>buffer</code></em>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>buffer</code></em>&#160;:</span></td>
<td> buffer to hash
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>length</code></em>&#160;:</span></td>
<td> length of <em class="parameter"><code>buffer</code></em>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392016"></a><h3>
<a name="gnet-md5-new-string"></a>gnet_md5_new_string ()</h3>
<a class="indexterm" name="id392029"></a><pre class="programlisting"><a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               gnet_md5_new_string                 (const gchar *str);</pre>
<p>
Creates a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a> from <em class="parameter"><code>str</code></em>.  <em class="parameter"><code>str</code></em> is a hexidecimal string
 representing the digest.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>str</code></em>&#160;:</span></td>
<td> hexidecimal string
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392116"></a><h3>
<a name="gnet-md5-clone"></a>gnet_md5_clone ()</h3>
<a class="indexterm" name="id392128"></a><pre class="programlisting"><a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               gnet_md5_clone                      (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);</pre>
<p>
Copies a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a copy of <em class="parameter"><code>md5</code></em>.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392209"></a><h3>
<a name="gnet-md5-delete"></a>gnet_md5_delete ()</h3>
<a class="indexterm" name="id392221"></a><pre class="programlisting">void                gnet_md5_delete                     (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);</pre>
<p>
Deletes a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392285"></a><h3>
<a name="gnet-md5-new-incremental"></a>gnet_md5_new_incremental ()</h3>
<a class="indexterm" name="id392298"></a><pre class="programlisting"><a href="gnet-md5.html#GMD5:CAPS">GMD5</a>*               gnet_md5_new_incremental            (void);</pre>
<p>
Creates a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a> incrementally.  After creating a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>, call
 <a href="gnet-md5.html#gnet-md5-update"><code class="function">gnet_md5_update()</code></a> one or more times to hash data.  Finally, call
 <a href="gnet-md5.html#gnet-md5-final"><code class="function">gnet_md5_final()</code></a> to compute the final hash value.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.

</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392381"></a><h3>
<a name="gnet-md5-update"></a>gnet_md5_update ()</h3>
<a class="indexterm" name="id392393"></a><pre class="programlisting">void                gnet_md5_update                     (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5,
                                                         const gchar *buffer,
                                                         guint length);</pre>
<p>
Updates the hash with <em class="parameter"><code>buffer</code></em>.  This may be called several times
 on a hash created by <a href="gnet-md5.html#gnet-md5-new-incremental"><code class="function">gnet_md5_new_incremental()</code></a> before being
 finalized by calling <a href="gnet-md5.html#gnet-md5-final"><code class="function">gnet_md5_final()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>buffer</code></em>&#160;:</span></td>
<td> buffer to add
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>length</code></em>&#160;:</span></td>
<td> length of <em class="parameter"><code>buffer</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392525"></a><h3>
<a name="gnet-md5-final"></a>gnet_md5_final ()</h3>
<a class="indexterm" name="id392537"></a><pre class="programlisting">void                gnet_md5_final                      (<a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);</pre>
<p>
Calcuates the final hash value of a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.  This should only be
 called on an <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a> created by <a href="gnet-md5.html#gnet-md5-new-incremental"><code class="function">gnet_md5_new_incremental()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392620"></a><h3>
<a name="gnet-md5-equal"></a>gnet_md5_equal ()</h3>
<a class="indexterm" name="id392632"></a><pre class="programlisting">gboolean            gnet_md5_equal                      (gconstpointer p1,
                                                         gconstpointer p2);</pre>
<p>
Compares two <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>'s for equality.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>p1</code></em>&#160;:</span></td>
<td> first <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>p2</code></em>&#160;:</span></td>
<td> second <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>.
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> TRUE if they are equal; FALSE otherwise.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id392735"></a><h3>
<a name="gnet-md5-hash"></a>gnet_md5_hash ()</h3>
<a class="indexterm" name="id392748"></a><pre class="programlisting">guint               gnet_md5_hash                       (gconstpointer p);</pre>
<p>
Creates a hash code for a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a> for use with GHashTable.  This
 hash value is not the same as the MD5 digest.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>p</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the hash code for <em class="parameter"><code>p</code></em>.

</td>
</tr>
</tbody>
</table></div>
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<hr>
<div class="refsect2" lang="en">
<a name="id392829"></a><h3>
<a name="gnet-md5-get-digest"></a>gnet_md5_get_digest ()</h3>
<a class="indexterm" name="id392841"></a><pre class="programlisting">gchar*              gnet_md5_get_digest                 (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);</pre>
<p>
Gets the raw MD5 digest.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a callee-owned buffer containing the MD5 hash digest.
 The buffer is <a href="gnet-md5.html#GNET-MD5-HASH-LENGTH:CAPS"><code class="literal">GNET_MD5_HASH_LENGTH</code></a> bytes long.

</td>
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</tbody>
</table></div>
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<hr>
<div class="refsect2" lang="en">
<a name="id392919"></a><h3>
<a name="gnet-md5-get-string"></a>gnet_md5_get_string ()</h3>
<a class="indexterm" name="id392932"></a><pre class="programlisting">gchar*              gnet_md5_get_string                 (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5);</pre>
<p>
Gets the digest represented a human-readable string.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a hexadecimal string representing the digest.  The string
 is 2 * <a href="gnet-md5.html#GNET-MD5-HASH-LENGTH:CAPS"><code class="literal">GNET_MD5_HASH_LENGTH</code></a> bytes long and NULL terminated.  The
 string is caller owned.

</td>
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</table></div>
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<hr>
<div class="refsect2" lang="en">
<a name="id393010"></a><h3>
<a name="gnet-md5-copy-string"></a>gnet_md5_copy_string ()</h3>
<a class="indexterm" name="id393022"></a><pre class="programlisting">void                gnet_md5_copy_string                (const <a href="gnet-md5.html#GMD5:CAPS">GMD5</a> *md5,
                                                         gchar *buffer);</pre>
<p>
Copies the digest, represented as a string, into <em class="parameter"><code>buffer</code></em>.  The
string is not NULL terminated.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>md5</code></em>&#160;:</span></td>
<td> a <a href="gnet-md5.html#GMD5:CAPS"><span class="type">GMD5</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>buffer</code></em>&#160;:</span></td>
<td> buffer at least 2 * <a href="gnet-md5.html#GNET-MD5-HASH-LENGTH:CAPS"><code class="literal">GNET_MD5_HASH_LENGTH</code></a> bytes long
</td>
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</tbody>
</table></div>
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