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+<br clear="all"><div class="SECT1">
+<h1 class="SECT1"><a name="XMLSEC-NOTES-KEYS-MNGR-VERIFY-DECRYPT">Using keys manager for verification/decryption.</a></h1>
+<p>If more than one key could be used for signature or encryption,
+ then using <code class="STRUCTFIELD">signKey</code> member of
+ <a href="xmlsec-xmldsig.html#XMLSECDSIGCTX">xmlSecDSigCtx</a> structure or
+ <code class="STRUCTFIELD">encKey</code> member of
+ <a href="xmlsec-xmlenc.html#XMLSECENCCTX">xmlSecEncCtx</a> structure
+ is not possible. Instead, the application should load known keys in
+ the keys manager and use &lt;dsig:KeyName/&gt; element to specify
+ the key name.
+ </p>
+<p> </p>
+<div class="EXAMPLE">
+<a name="AEN391"></a><p><b>Example 3. Initializing keys manager and loading DES keys from binary files.</b></p>
+<pre class="PROGRAMLISTING">/**
+ * load_des_keys:
+ * @files: the list of filenames.
+ * @files_size: the number of filenames in #files.
+ *
+ * Creates default keys manager and load DES keys from #files in it.
+ * The caller is responsible for destroing returned keys manager using
+ * @xmlSecKeysMngrDestroy.
+ *
+ * Returns the pointer to newly created keys manager or NULL if an error
+ * occurs.
+ */
+xmlSecKeysMngrPtr
+load_des_keys(char** files, int files_size) {
+ xmlSecKeysMngrPtr mngr;
+ xmlSecKeyPtr key;
+ int i;
+
+ assert(files);
+ assert(files_size &gt; 0);
+
+ /* create and initialize keys manager, we use a default list based
+ * keys manager, implement your own xmlSecKeysStore klass if you need
+ * something more sophisticated
+ */
+ mngr = xmlSecKeysMngrCreate();
+ if(mngr == NULL) {
+ fprintf(stderr, "Error: failed to create keys manager.\n");
+ return(NULL);
+ }
+ if(xmlSecCryptoAppDefaultKeysMngrInit(mngr) &lt; 0) {
+ fprintf(stderr, "Error: failed to initialize keys manager.\n");
+ xmlSecKeysMngrDestroy(mngr);
+ return(NULL);
+ }
+
+ for(i = 0; i &lt; files_size; ++i) {
+ assert(files[i]);
+
+ /* load DES key */
+ key = xmlSecKeyReadBinaryFile(xmlSecKeyDataDesId, files[i]);
+ if(key == NULL) {
+ fprintf(stderr,"Error: failed to load des key from binary file \"%s\"\n", files[i]);
+ xmlSecKeysMngrDestroy(mngr);
+ return(NULL);
+ }
+
+ /* set key name to the file name, this is just an example! */
+ if(xmlSecKeySetName(key, BAD_CAST files[i]) &lt; 0) {
+ fprintf(stderr,"Error: failed to set key name for key from \"%s\"\n", files[i]);
+ xmlSecKeyDestroy(key);
+ xmlSecKeysMngrDestroy(mngr);
+ return(NULL);
+ }
+
+ /* add key to keys manager, from now on keys manager is responsible
+ * for destroying key
+ */
+ if(xmlSecCryptoAppDefaultKeysMngrAdoptKey(mngr, key) &lt; 0) {
+ fprintf(stderr,"Error: failed to add key from \"%s\" to keys manager\n", files[i]);
+ xmlSecKeyDestroy(key);
+ xmlSecKeysMngrDestroy(mngr);
+ return(NULL);
+ }
+ }
+
+ return(mngr);
+}
+ </pre>
+<p><a href="xmlsec-decrypt-with-keys-mngr.html#XMLSEC-EXAMPLE-DECRYPT2">Full program listing</a></p>
+</div>
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+<td align="right"><a accesskey="n" href="xmlsec-notes-custom-keys-store.html"><b>Implementing a custom keys store. &gt;&gt;&gt;</b></a></td>
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