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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 <dsig:KeyName/> 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 > 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) < 0) {
fprintf(stderr, "Error: failed to initialize keys manager.\n");
xmlSecKeysMngrDestroy(mngr);
return(NULL);
}
for(i = 0; i < 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]) < 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) < 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>
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