// $Id: NSString+BasicAuth.m,v 1.1 2004/06/08 11:08:07 helge Exp $

#include "NSString+BasicAuth.h"
#include <NGExtensions/NGBase64Coding.h>
#include "common.h"

@implementation NSString(BasicAuth)

/* eg: authorization: "basic aGVsZ2U6aGVsZ2VoZWxnZQ==" */

- (BOOL)isHTTPBasicAuthorizationValue {
  return [self hasPrefix:@"basic"];
}

- (NSString *)decodedHTTPBasicAuthorizationValue {
  NSRange  r;
  NSString *s;
  
  r = [self rangeOfString:@" " options:NSBackwardsSearch];
  if (r.length == 0)
    return nil;
  
  s = [self substringFromIndex:(r.location + r.length)];
  return [s stringByDecodingBase64];
}

- (NSString *)loginOfHTTPBasicAuthorizationValue {
  NSString *s;
  unsigned idx;
  
  if ((s = [self decodedHTTPBasicAuthorizationValue]) == nil)
    return nil;
  if ((idx = [s indexOfString:@":"]) == NSNotFound)
    return nil;
  return [s substringToIndex:idx];
}
- (NSString *)passwordOfHTTPBasicAuthorizationValue {
  NSString *s;
  unsigned idx;
  
  if ((s = [self decodedHTTPBasicAuthorizationValue]) == nil)
    return nil;
  if ((idx = [s indexOfString:@":"]) == NSNotFound)
    return nil;
  return [s substringFromIndex:(idx + 1)];
}

@end /* NSString(BasicAuth) */