The eid-viewer library

This library was originally written for the eID Viewer. It allows for reading of identity data from an eID card, as well as interacting with the .eid XML files that the eID Viewer knows. While this is provided as a library to manage identity data and can be used as such, its heritage of being the base of an eID Viewer is still visible in some areas.

This is a C API, but wrapper libraries are also available for Objective-C (on OS X) and C# (on Windows).

A simple application that works with this library would look like this:

#include <eid-viewer/eid-viewer.h>
 
void newstringdata(const EID_CHAR* label, const EID_CHAR* data) {
    printf("Received data with label %s and contents %s\n", label, data);
}
 
void newstate(enum eid_vwr_states new_state) {
    switch(new_state) {
        case STATE_TOKEN_WAIT:
            exit(0);
        default:
            break;
    }
}
 
int main(void) {
    struct eid_vwr_ui_callbacks *callbacks = eid_vwr_cbstruct();
 
    callbacks->newstate = newstate;
    callbacks->newstringdata = newstringdata;
 
    eid_vwr_createcallbacks(callbacks);
 
    eid_vwr_be_mainloop();
}

For more information, please see the C API

The same example in Objective-C would look like:

#import <BeidView/oslayer-objc.h>
 
@implementation App : NSObject<eIDOSLayerUI>
-(void)newstate:(eIDState)state {
    switch(state) {
        case eIDStateTokenWait:
            exit(0);
        default:
            break;
    }
}
-(void)newstringdata:(NSString *)data withLabel:(NSString *)label{
    NSLog(@"Received data with label %@ and contents %@", label, data);
}
@end
int main(void) {
    App* a = [[App alloc]init];
 
    [eIDOsLayerBackend setUi:a];
    [eIDOsLayerBackend mainloop];
}

More details are in the Objective-C API overview