Issue with error CS0246: The type or namespace name 'HMACSHA1' could not be found

Hello, I have a similar problem. I'm using TwitterAPI.cs I found online:

Code (CSharp):

1. using UnityEngine;
2.  
3. using System;
4. using System.Security.Cryptography;
5. using System.Collections.Generic;
6. using System.Text;
7. using System.Globalization;
8. using System.Collections;
9.  
10.  
11. using MiniJSON;
12.  
13. public class TwitterAPI : MonoBehaviour {
14.     public string oauthConsumerKey = "";
15.     public string oauthConsumerSecret = "";
16.     public string oauthToken = "";
17.     public string oauthTokenSecret = "";
18.  
19.     private string oauthNonce = "";
20.     private string oauthTimeStamp = "";
21.  
22.     public static TwitterAPI instance = null;
23.  
24.     // Use this for initialization
25.     void Awake () {
26.         if (instance == null) {
27.             instance = this;
28.         }
29.         else {
30.             Debug.LogError("More then one instance of TwitterAPI: " + this.transform.name);
31.         }
32.     }
33.  
34.     public void SearchTwitter(string keywords, Action<List<TweetSearchTwitterData> > callback)
35.     {
36.         PrepareOAuthData();
37.         StartCoroutine(SearchTwitter_Coroutine(keywords, callback));
38.     }
39.  
40.     public void FindTrendsByLocationTwitter(string location, Action<List<TrendByLocationTwitterData> > callback)
41.     {    
42.         PrepareOAuthData();
43.         StartCoroutine(FindTrendsByLocation_Coroutine(location, callback));
44.     }
45.  
46.     private IEnumerator SearchTwitter_Coroutine(string keywords, Action<List<TweetSearchTwitterData> > callback)
47.     {
48.         // Fix up hashes to be webfriendly
49.         keywords = Uri.EscapeDataString(keywords);
50.  
51.         string twitterUrl = "https://api.twitter.com/1.1/search/tweets.json";
52.      
53.         SortedDictionary<string, string> twitterParamsDictionary = new SortedDictionary<string, string>
54.         {
55.             {"q", keywords},
56.             {"count", "100"},
57.             {"result_type", "recent"},
58.         };
59.  
60.         WWW query = CreateTwitterAPIQuery(twitterUrl, twitterParamsDictionary);
61.         yield return query;
62.  
63.         callback(ParseResultsFromSearchTwitter(query.text));
64.     }
65.  
66.     // Use of MINI JSON http://forum.unity3d.com/threads/35484-MiniJSON-script-for-parsing-JSON-data
67.     private List<TweetSearchTwitterData> ParseResultsFromSearchTwitter(string jsonResults) {
68.         Debug.Log(jsonResults);
69.      
70.         List<TweetSearchTwitterData> twitterDataList = new List<TweetSearchTwitterData>();
71.         object jsonObject = Json.Deserialize(jsonResults);
72.         IDictionary search = (IDictionary) jsonObject;
73.         IList tweets = (IList) search["statuses"];
74.         foreach (IDictionary tweet in tweets) {
75.             IDictionary userInfo = tweet["user"] as IDictionary;        
76.          
77.             TweetSearchTwitterData twitterData = new TweetSearchTwitterData();        
78.             twitterData.tweetText = tweet["text"] as string;
79.             twitterData.screenName = userInfo["screen_name"] as string;
80.             twitterData.retweetCount = (Int64)tweet["retweet_count"];
81.             twitterData.profileImageUrl = userInfo["profile_image_url"] as string;
82.          
83.             twitterDataList.Add(twitterData);
84.         }
85.      
86.         return twitterDataList;
87.     }
88.  
89.     private IEnumerator FindTrendsByLocation_Coroutine(string location, Action<List<TrendByLocationTwitterData> > callback)
90.     {
91.         location = Uri.EscapeDataString(location);
92.         string twitterUrl = "https://api.twitter.com/1.1/trends/place.json";
93.         SortedDictionary<string, string> twitterParamsDictionary = new SortedDictionary<string, string>
94.         {
95.             {"id", location}
96.         };
97.  
98.         WWW query = CreateTwitterAPIQuery(twitterUrl, twitterParamsDictionary);
99.         yield return query;
100.      
101.         callback(ParseResultsFromFindTrendsByLocationTwitter(query.text));
102.     }
103.  
104.     private List<TrendByLocationTwitterData> ParseResultsFromFindTrendsByLocationTwitter(string jsonResults) {
105.         Debug.Log(jsonResults);
106.      
107.         List<TrendByLocationTwitterData> twitterDataList = new List<TrendByLocationTwitterData>();
108.         object jsonObject = Json.Deserialize(jsonResults);
109.         IList jsonList = jsonObject as IList;
110.         IDictionary search = jsonList[0] as IDictionary;
111.         IList trends = (IList) search["trends"];
112.         foreach (IDictionary trend in trends) {
113.             TrendByLocationTwitterData twitterData = new TrendByLocationTwitterData();        
114.             twitterData.name = trend["name"] as string;
115.             twitterData.query = trend["query"] as string;
116.             twitterData.url = trend["url"] as string;
117.          
118.             twitterDataList.Add(twitterData);
119.         }
120.      
121.         return twitterDataList;
122.     }
123.  
124.     private WWW CreateTwitterAPIQuery(string twitterUrl, SortedDictionary<string, string> twitterParamsDictionary)
125.     {
126.         string signature = CreateSignature(twitterUrl, twitterParamsDictionary);
127.         Debug.Log("OAuth Signature: " + signature);
128.      
129.         string authHeaderParam = CreateAuthorizationHeaderParameter(signature, this.oauthTimeStamp);
130.         Debug.Log("Auth Header: " + authHeaderParam);
131.      
132.         Dictionary<string, string> headers = new Dictionary<string, string>();
133.         headers["Authorization"] = authHeaderParam;
134.      
135.         string twitterParams = ParamDictionaryToString(twitterParamsDictionary);
136.      
137.         WWW query = new WWW(twitterUrl + "?" + twitterParams, null, headers);    
138.         return query;
139.     }
140.  
141.  
142.     private void PrepareOAuthData() {
143.         oauthNonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString(CultureInfo.InvariantCulture)));
144.         TimeSpan _timeSpan = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0);    
145.         oauthTimeStamp = Convert.ToInt64(_timeSpan.TotalSeconds).ToString(CultureInfo.InvariantCulture);
146.  
147.         // Override the nounce and timestamp here if troubleshooting with Twitter's OAuth Tool
148.         //oauthNonce = "69db07d069ac50cd673f52ee08678596";
149.         //oauthTimeStamp = "1442419142";
150.     }
151.      
152.     // Taken from http://www.i-avington.com/Posts/Post/making-a-twitter-oauth-api-call-using-c
153.     private string CreateSignature(string url, SortedDictionary<string, string> searchParamsDictionary)
154.     {
155.         //string builder will be used to append all the key value pairs
156.         StringBuilder signatureBaseStringBuilder = new StringBuilder();
157.         signatureBaseStringBuilder.Append("GET&");
158.         signatureBaseStringBuilder.Append(Uri.EscapeDataString(url));
159.         signatureBaseStringBuilder.Append("&");
160.  
161.         //the key value pairs have to be sorted by encoded key
162.         SortedDictionary<string, string> urlParamsDictionary = new SortedDictionary<string, string>
163.                              {
164.                                  {"oauth_version", "1.0"},
165.                                  {"oauth_consumer_key", this.oauthConsumerKey},
166.                                  {"oauth_nonce", this.oauthNonce},
167.                                  {"oauth_signature_method", "HMAC-SHA1"},
168.                                  {"oauth_timestamp", this.oauthTimeStamp},
169.                                  {"oauth_token", this.oauthToken}
170.                              };
171.      
172.         foreach (KeyValuePair<string, string> keyValuePair in searchParamsDictionary)
173.         {
174.             urlParamsDictionary.Add(keyValuePair.Key, keyValuePair.Value);
175.         }
176.      
177.         signatureBaseStringBuilder.Append(Uri.EscapeDataString(ParamDictionaryToString(urlParamsDictionary)));
178.            string signatureBaseString = signatureBaseStringBuilder.ToString();
179.  
180.         Debug.Log("Signature Base String: " + signatureBaseString);
181.      
182.         //generation the signature key the hash will use
183.         string signatureKey =
184.             Uri.EscapeDataString(this.oauthConsumerSecret) + "&" +
185.             Uri.EscapeDataString(this.oauthTokenSecret);
186.  
187.         HMACSHA1 hmacsha1 = new HMACSHA1(
188.             new ASCIIEncoding().GetBytes(signatureKey));
189.  
190.         //hash the values
191.         string signatureString = Convert.ToBase64String(
192.             hmacsha1.ComputeHash(
193.                 new ASCIIEncoding().GetBytes(signatureBaseString)));
194.      
195.         return signatureString;
196.     }
197.  
198.     private string CreateAuthorizationHeaderParameter(string signature, string timeStamp)
199.     {
200.         string authorizationHeaderParams = String.Empty;
201.         authorizationHeaderParams += "OAuth ";
202.    
203.         authorizationHeaderParams += "oauth_consumer_key="
204.                                      + "\"" + Uri.EscapeDataString(this.oauthConsumerKey) + "\", ";
205.      
206.         authorizationHeaderParams += "oauth_nonce=" + "\"" +
207.                                      Uri.EscapeDataString(this.oauthNonce) + "\", ";
208.      
209.         authorizationHeaderParams += "oauth_signature=" + "\""
210.                                      + Uri.EscapeDataString(signature) + "\", ";
211.    
212.         authorizationHeaderParams += "oauth_signature_method=" + "\"" +
213.             Uri.EscapeDataString("HMAC-SHA1") +
214.             "\", ";
215.  
216.         authorizationHeaderParams += "oauth_timestamp=" + "\"" +
217.                                      Uri.EscapeDataString(timeStamp) + "\", ";    
218.  
219.         authorizationHeaderParams += "oauth_token=" + "\"" +
220.                                      Uri.EscapeDataString(this.oauthToken) + "\", ";
221.  
222.         authorizationHeaderParams += "oauth_version=" + "\"" +
223.                                      Uri.EscapeDataString("1.0") + "\"";
224.         return authorizationHeaderParams;
225.     }
226.  
227.     private string ParamDictionaryToString(IDictionary<string, string> paramsDictionary) {
228.         StringBuilder dictionaryStringBuilder = new StringBuilder();    
229.         foreach (KeyValuePair<string, string> keyValuePair in paramsDictionary)
230.         {
231.             //append a = between the key and the value and a & after the value
232.             dictionaryStringBuilder.Append(string.Format("{0}={1}&", keyValuePair.Key, keyValuePair.Value));
233.         }
234.  
235.         // Get rid of the extra & at the end of the string
236.         string paramString = dictionaryStringBuilder.ToString().Substring(0, dictionaryStringBuilder.Length - 1);
237.         return paramString;
238.     }
239. }

but when I am trying to compile it for Hololens I get:

Could anyone advise on changes that need to be made to make it work?

Thanks!

 

Ok, so I was able to make it work by adopting https://forum.unity3d.com/threads/r...snt-exist-in-target-fram.313589/#post-2038137

However, instead of MacAlgorithmNames.HmacSha256, I used MacAlgorithmNames.HmacSha1. The resulting code is (working both in the editor and Hololens):

Code (CSharp):

1. using UnityEngine;
2.  
3. using System;
4. using System.Security.Cryptography;
5. using System.Collections.Generic;
6. using System.Text;
7. using System.Globalization;
8. using System.Collections;
9.  
10.  
11. using MiniJSON;
12.  
13. #if NETFX_CORE
14. using System.Runtime.InteropServices.WindowsRuntime;
15. using Windows.Security.Cryptography;
16. using Windows.Security.Cryptography.Core;
17. #endif
18.  
19. public class TwitterAPI : MonoBehaviour {  
20.     public string oauthConsumerKey = "";
21.     public string oauthConsumerSecret = "";
22.     public string oauthToken = "";
23.     public string oauthTokenSecret = "";
24.    
25.     private string oauthNonce = "";
26.     private string oauthTimeStamp = "";
27.    
28.     public static TwitterAPI instance = null;
29.    
30.     // Use this for initialization
31.     void Awake () {
32.         if (instance == null) {
33.             instance = this;
34.         }
35.         else {
36.             Debug.LogError("More then one instance of TwitterAPI: " + this.transform.name);
37.         }
38.     }
39.  
40.     public void SearchTwitter(string keywords, Action<List<TweetSearchTwitterData> > callback)
41.     {  
42.         PrepareOAuthData();
43.         StartCoroutine(SearchTwitter_Coroutine(keywords, callback));
44.     }
45.  
46.     public void FindTrendsByLocationTwitter(string location, Action<List<TrendByLocationTwitterData> > callback)
47.     {      
48.         PrepareOAuthData();
49.         StartCoroutine(FindTrendsByLocation_Coroutine(location, callback));
50.     }
51.    
52.     private IEnumerator SearchTwitter_Coroutine(string keywords, Action<List<TweetSearchTwitterData> > callback)
53.     {
54.         // Fix up hashes to be webfriendly
55.         keywords = Uri.EscapeDataString(keywords);
56.  
57.         string twitterUrl = "https://api.twitter.com/1.1/search/tweets.json";
58.        
59.         SortedDictionary<string, string> twitterParamsDictionary = new SortedDictionary<string, string>
60.         {
61.             {"q", keywords},
62.             {"count", "100"},
63.             {"result_type", "recent"},
64.         };
65.  
66.         WWW query = CreateTwitterAPIQuery(twitterUrl, twitterParamsDictionary);
67.         yield return query;
68.  
69.         callback(ParseResultsFromSearchTwitter(query.text));
70.     }
71.  
72.     // Use of MINI JSON http://forum.unity3d.com/threads/35484-MiniJSON-script-for-parsing-JSON-data
73.     private List<TweetSearchTwitterData> ParseResultsFromSearchTwitter(string jsonResults) {
74.         Debug.Log(jsonResults);
75.        
76.         List<TweetSearchTwitterData> twitterDataList = new List<TweetSearchTwitterData>();
77.         object jsonObject = Json.Deserialize(jsonResults);
78.         IDictionary search = (IDictionary) jsonObject;
79.         IList tweets = (IList) search["statuses"];
80.         foreach (IDictionary tweet in tweets) {
81.             IDictionary userInfo = tweet["user"] as IDictionary;          
82.            
83.             TweetSearchTwitterData twitterData = new TweetSearchTwitterData();          
84.             twitterData.tweetText = tweet["text"] as string;
85.             twitterData.screenName = userInfo["screen_name"] as string;
86.             twitterData.retweetCount = (Int64)tweet["retweet_count"];
87.             twitterData.profileImageUrl = userInfo["profile_image_url"] as string;
88.            
89.             twitterDataList.Add(twitterData);
90.         }
91.        
92.         return twitterDataList;
93.     }
94.  
95.     private IEnumerator FindTrendsByLocation_Coroutine(string location, Action<List<TrendByLocationTwitterData> > callback)
96.     {
97.         location = Uri.EscapeDataString(location);
98.         string twitterUrl = "https://api.twitter.com/1.1/trends/place.json";
99.         SortedDictionary<string, string> twitterParamsDictionary = new SortedDictionary<string, string>
100.         {
101.             {"id", location}
102.         };
103.  
104.         WWW query = CreateTwitterAPIQuery(twitterUrl, twitterParamsDictionary);
105.         yield return query;
106.        
107.         callback(ParseResultsFromFindTrendsByLocationTwitter(query.text));
108.     }
109.  
110.     private List<TrendByLocationTwitterData> ParseResultsFromFindTrendsByLocationTwitter(string jsonResults) {
111.         Debug.Log(jsonResults);
112.        
113.         List<TrendByLocationTwitterData> twitterDataList = new List<TrendByLocationTwitterData>();
114.         object jsonObject = Json.Deserialize(jsonResults);
115.         IList jsonList = jsonObject as IList;
116.         IDictionary search = jsonList[0] as IDictionary;
117.         IList trends = (IList) search["trends"];
118.         foreach (IDictionary trend in trends) {
119.             TrendByLocationTwitterData twitterData = new TrendByLocationTwitterData();          
120.             twitterData.name = trend["name"] as string;
121.             twitterData.query = trend["query"] as string;
122.             twitterData.url = trend["url"] as string;
123.            
124.             twitterDataList.Add(twitterData);
125.         }
126.        
127.         return twitterDataList;
128.     }
129.  
130.     private WWW CreateTwitterAPIQuery(string twitterUrl, SortedDictionary<string, string> twitterParamsDictionary)
131.     {
132.         string signature = CreateSignature(twitterUrl, twitterParamsDictionary);
133.         Debug.Log("OAuth Signature: " + signature);
134.        
135.         string authHeaderParam = CreateAuthorizationHeaderParameter(signature, this.oauthTimeStamp);
136.         Debug.Log("Auth Header: " + authHeaderParam);
137.        
138.         Dictionary<string, string> headers = new Dictionary<string, string>();
139.         headers["Authorization"] = authHeaderParam;
140.        
141.         string twitterParams = ParamDictionaryToString(twitterParamsDictionary);
142.        
143.         WWW query = new WWW(twitterUrl + "?" + twitterParams, null, headers);      
144.         return query;
145.     }
146.  
147.  
148.     private void PrepareOAuthData() {
149.         oauthNonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString(CultureInfo.InvariantCulture)));
150.         TimeSpan _timeSpan = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0);      
151.         oauthTimeStamp = Convert.ToInt64(_timeSpan.TotalSeconds).ToString(CultureInfo.InvariantCulture);
152.  
153.         // Override the nounce and timestamp here if troubleshooting with Twitter's OAuth Tool
154.         //oauthNonce = "69db07d069ac50cd673f52ee08678596";
155.         //oauthTimeStamp = "1442419142";
156.     }
157.        
158.     // Taken from http://www.i-avington.com/Posts/Post/making-a-twitter-oauth-api-call-using-c
159.     private string CreateSignature(string url, SortedDictionary<string, string> searchParamsDictionary)
160.     {
161.         //string builder will be used to append all the key value pairs
162.         StringBuilder signatureBaseStringBuilder = new StringBuilder();
163.         signatureBaseStringBuilder.Append("GET&");
164.         signatureBaseStringBuilder.Append(Uri.EscapeDataString(url));
165.         signatureBaseStringBuilder.Append("&");
166.  
167.         //the key value pairs have to be sorted by encoded key
168.         SortedDictionary<string, string> urlParamsDictionary = new SortedDictionary<string, string>
169.                              {
170.                                  {"oauth_version", "1.0"},
171.                                  {"oauth_consumer_key", this.oauthConsumerKey},
172.                                  {"oauth_nonce", this.oauthNonce},
173.                                  {"oauth_signature_method", "HMAC-SHA1"},
174.                                  {"oauth_timestamp", this.oauthTimeStamp},
175.                                  {"oauth_token", this.oauthToken}
176.                              };
177.        
178.         foreach (KeyValuePair<string, string> keyValuePair in searchParamsDictionary)
179.         {
180.             urlParamsDictionary.Add(keyValuePair.Key, keyValuePair.Value);
181.         }  
182.        
183.         signatureBaseStringBuilder.Append(Uri.EscapeDataString(ParamDictionaryToString(urlParamsDictionary)));
184.            string signatureBaseString = signatureBaseStringBuilder.ToString();
185.  
186.         Debug.Log("Signature Base String: " + signatureBaseString);
187.        
188.         //generation the signature key the hash will use
189.         string signatureKey =
190.             Uri.EscapeDataString(this.oauthConsumerSecret) + "&" +
191.             Uri.EscapeDataString(this.oauthTokenSecret);
192.  
193. #if NETFX_CORE
194.         var objMacProv = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
195.         byte[] secretKey = Encoding.UTF8.GetBytes(signatureKey);
196.         var hash = objMacProv.CreateHash(secretKey.AsBuffer());
197.         hash.Append(CryptographicBuffer.ConvertStringToBinary(signatureBaseString, BinaryStringEncoding.Utf8));
198.         string signatureString = CryptographicBuffer.EncodeToBase64String(hash.GetValueAndReset());
199.        
200. #else
201.         HMACSHA1 hmacsha1 = new HMACSHA1(
202.             new ASCIIEncoding().GetBytes(signatureKey));
203.  
204.         //hash the values
205.         string signatureString = Convert.ToBase64String(
206.             hmacsha1.ComputeHash(
207.                 new ASCIIEncoding().GetBytes(signatureBaseString)));
208. #endif      
209.         return signatureString;
210.     }
211.    
212.     private string CreateAuthorizationHeaderParameter(string signature, string timeStamp)
213.     {
214.         string authorizationHeaderParams = String.Empty;
215.         authorizationHeaderParams += "OAuth ";
216.      
217.         authorizationHeaderParams += "oauth_consumer_key="
218.                                      + "\"" + Uri.EscapeDataString(this.oauthConsumerKey) + "\", ";
219.        
220.         authorizationHeaderParams += "oauth_nonce=" + "\"" +
221.                                      Uri.EscapeDataString(this.oauthNonce) + "\", ";
222.        
223.         authorizationHeaderParams += "oauth_signature=" + "\""
224.                                      + Uri.EscapeDataString(signature) + "\", ";
225.      
226.         authorizationHeaderParams += "oauth_signature_method=" + "\"" +
227.             Uri.EscapeDataString("HMAC-SHA1") +
228.             "\", ";
229.  
230.         authorizationHeaderParams += "oauth_timestamp=" + "\"" +
231.                                      Uri.EscapeDataString(timeStamp) + "\", ";      
232.  
233.         authorizationHeaderParams += "oauth_token=" + "\"" +
234.                                      Uri.EscapeDataString(this.oauthToken) + "\", ";
235.  
236.         authorizationHeaderParams += "oauth_version=" + "\"" +
237.                                      Uri.EscapeDataString("1.0") + "\"";
238.         return authorizationHeaderParams;
239.     }
240.    
241.     private string ParamDictionaryToString(IDictionary<string, string> paramsDictionary) {
242.         StringBuilder dictionaryStringBuilder = new StringBuilder();      
243.         foreach (KeyValuePair<string, string> keyValuePair in paramsDictionary)
244.         {
245.             //append a = between the key and the value and a & after the value
246.             dictionaryStringBuilder.Append(string.Format("{0}={1}&", keyValuePair.Key, keyValuePair.Value));
247.         }
248.  
249.         // Get rid of the extra & at the end of the string
250.         string paramString = dictionaryStringBuilder.ToString().Substring(0, dictionaryStringBuilder.Length - 1);
251.         return paramString;
252.     }
253. }