public class DeveloperUtility {
	
    public static List<HTTPResponse> CreateFields(string sobject_name,string [] fields){
        List<HTTPResponse> results = new List<HTTPResponse>();
        for(string f : fields){
            string old_label = f.removeEnd('__c').replace('_',' ');
            string label = old_label + ' Encrypted';
            string name =  label.replace(' ','_')+'__c';
            string description = '';
            system.debug('old_label='+old_label);
            system.debug('label='+label);
            system.debug('name='+name);
            results.add(CreateField(sobject_name,label,name,description,'Text'));
        }
        return results;
    }
    
    
    public static HTTPResponse CreateField(string sobject_name, string label,string name,string description,string type){
        HTTP h = new HTTP();
        HTTPRequest req = new HTTPRequest();
        req.setMethod('POST');
        req.setHeader('Content-Type', 'text/xml');
        req.setHeader('SOAPAction', 'create');
        
        
        //string sobject_name = 'Contact';
        //string label = 'Title';
        //string name =  'Title'+'_Encrypted__c';
        //string description = '';
        
        //string type = 'Text';
        boolean typeSpecified = true;
        
        String b = '<?xml version="1.0" encoding="UTF-8"?>';
        b += '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">';
        b += '<soapenv:Header>';
        b += '<ns1:SessionHeader soapenv:mustUnderstand="0" xmlns:ns1="http://soap.sforce.com/2006/04/metadata">';
        b += '<ns1:sessionId>' + UserInfo.getSessionId() + '</ns1:sessionId>';
        b += '</ns1:SessionHeader>';
        b += '</soapenv:Header>';
        b += '<soapenv:Body>';
        b += '<create xmlns="http://soap.sforce.com/2006/04/metadata">';
        b += '<metadata xsi:type="ns2:CustomField" xmlns:ns2="http://soap.sforce.com/2006/04/metadata">';
        b += '<type>'+type+'</type>';
        b += '<fullName>'+sobject_name+'.'+name+'</fullName>';
        b += '<label>'+label+'</label>';
        b += '<length>255</length>';
        b += '<description>'+type+'</description>';
        b += '</metadata>';
        b += '</create>';
        b += '</soapenv:Body>';
        b += '</soapenv:Envelope>';
        
        req.setBody(b);
        req.setCompressed(false);
        req.setEndpoint('https://ocsm--pipl.my.salesforce.com/services/Soap/m/25.0');
        HTTPResponse resp = h.send(req);
        System.debug(resp.getBody());
        return resp;
    }
}