/**
 * load_trusted_certs:
 * @files:		the list of filenames.
 * @files_size:		the number of filenames in #files.
 *
 * Creates simple keys manager and load trusted certificates from PEM #files.
 * 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_trusted_certs(char** files, int files_size) {
    xmlSecKeysMngrPtr mngr;
    int i;
        
    assert(files);
    assert(files_size > 0);
    
    /* create and initialize keys manager, we use a simple 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 trusted cert */
	if(xmlSecCryptoAppKeysMngrCertLoad(mngr, files[i], xmlSecKeyDataFormatPem, xmlSecKeyDataTypeTrusted) < 0) {
    	    fprintf(stderr,"Error: failed to load pem certificate from \"%s\"\n", files[i]);
	    xmlSecKeysMngrDestroy(mngr);
	    return(NULL);
	}
    }
    return(mngr);
}
	    
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