9e9YEA5X

1NSDictionary *OAuthorizationHeaderDictionary(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret)
2{
3	NSString *_oAuthNonce = [NSString ab_GUID];
4	NSString *_oAuthTimestamp = [NSString stringWithFormat:@"%d", (int)[[NSDate date] timeIntervalSince1970]];
5	NSString *_oAuthSignatureMethod = @"HMAC-SHA1";
6	NSString *_oAuthVersion = @"1.0";
7	
8	NSMutableDictionary *oAuthAuthorizationParameters = [NSMutableDictionary dictionary];
9	[oAuthAuthorizationParameters setObject:_oAuthNonce forKey:@"oauth_nonce"];
10	[oAuthAuthorizationParameters setObject:_oAuthTimestamp forKey:@"oauth_timestamp"];
11	[oAuthAuthorizationParameters setObject:_oAuthSignatureMethod forKey:@"oauth_signature_method"];
12	[oAuthAuthorizationParameters setObject:_oAuthVersion forKey:@"oauth_version"];
13	[oAuthAuthorizationParameters setObject:_oAuthConsumerKey forKey:@"oauth_consumer_key"];
14	if(_oAuthToken)
15		[oAuthAuthorizationParameters setObject:_oAuthToken forKey:@"oauth_token"];
16	
17	// get query and body parameters
18	NSDictionary *additionalQueryParameters = [NSURL ab_parseURLQueryString:[url query]];
19	NSDictionary *additionalBodyParameters = nil;
20	if(body) {
21		NSString *string = [[[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding] autorelease];
22		if(string) {
23			additionalBodyParameters = [NSURL ab_parseURLQueryString:string];
24		}
25	}
26	
27	// combine all parameters
28	NSMutableDictionary *parameters = [[oAuthAuthorizationParameters mutableCopy] autorelease];
29	if(additionalQueryParameters) [parameters addEntriesFromDictionary:additionalQueryParameters];
30	if(additionalBodyParameters) [parameters addEntriesFromDictionary:additionalBodyParameters];
31	
32	// -> UTF-8 -> RFC3986
33	NSMutableDictionary *encodedParameters = [NSMutableDictionary dictionary];
34	for(NSString *key in parameters) {
35		NSString *value = [parameters objectForKey:key];
36		[encodedParameters setObject:[value ab_RFC3986EncodedString] forKey:[key ab_RFC3986EncodedString]];
37	}
38	
39	NSArray *sortedKeys = [[encodedParameters allKeys] sortedArrayUsingFunction:SortParameter context:encodedParameters];
40	
41	NSMutableArray *parameterArray = [NSMutableArray array];
42	for(NSString *key in sortedKeys) {
43		[parameterArray addObject:[NSString stringWithFormat:@"%@=%@", key, [encodedParameters objectForKey:key]]];
44	}
45	NSString *normalizedParameterString = [parameterArray componentsJoinedByString:@"&"];
46	
47	NSString *normalizedURLString = [NSString stringWithFormat:@"%@://%@%@", [url scheme], [url host], [url path]];
48	
49	NSString *signatureBaseString = [NSString stringWithFormat:@"%@&%@&%@",
50									 [method ab_RFC3986EncodedString],
51									 [normalizedURLString ab_RFC3986EncodedString],
52									 [normalizedParameterString ab_RFC3986EncodedString]];
53	NSString *key = [NSString stringWithFormat:@"%@&%@",
54                     [_oAuthConsumerSecret ab_RFC3986EncodedString],
55                     [_oAuthTokenSecret ab_RFC3986EncodedString]];
56
57	NSData *signature = HMAC_SHA1(signatureBaseString, key);
58	NSString *base64Signature = [signature base64EncodedString];
59	
60	NSMutableDictionary *authorizationHeaderDictionary = [[oAuthAuthorizationParameters mutableCopy] autorelease];
61	[authorizationHeaderDictionary setObject:base64Signature forKey:@"oauth_signature"];
62	
63	return authorizationHeaderDictionary;
64}