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author | Adam Frisby | 2008-10-14 08:54:46 +0000 |
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committer | Adam Frisby | 2008-10-14 08:54:46 +0000 |
commit | 54d7be8a49cbbd47217df84c131221b19e66f0e3 (patch) | |
tree | 0c29dd79163dda99da1855d523e4c8c0b70c32f0 /OpenSim/Framework/Communications | |
parent | * Cleaned up tons of code duplication in ODEPrim (diff) | |
download | opensim-SC_OLD-54d7be8a49cbbd47217df84c131221b19e66f0e3.zip opensim-SC_OLD-54d7be8a49cbbd47217df84c131221b19e66f0e3.tar.gz opensim-SC_OLD-54d7be8a49cbbd47217df84c131221b19e66f0e3.tar.bz2 opensim-SC_OLD-54d7be8a49cbbd47217df84c131221b19e66f0e3.tar.xz |
* Adding CrytoGridAssetClient support - allows encrypting assets that are stored on a potentially hostile grid. This is not DRM, not should be relied on until after it's been security audited. I'll write a blog post on this explaining how/why/when you should use this, and what it does.
Diffstat (limited to '')
-rw-r--r-- | OpenSim/Framework/Communications/Cache/CryptoGridAssetClient.cs | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/OpenSim/Framework/Communications/Cache/CryptoGridAssetClient.cs b/OpenSim/Framework/Communications/Cache/CryptoGridAssetClient.cs new file mode 100644 index 0000000..a8e6efb --- /dev/null +++ b/OpenSim/Framework/Communications/Cache/CryptoGridAssetClient.cs | |||
@@ -0,0 +1,527 @@ | |||
1 | /* | ||
2 | * Copyright (c) Contributors, http://www.openmetaverse.org/ | ||
3 | * See CONTRIBUTORS.TXT for a full list of copyright holders. | ||
4 | * | ||
5 | * Redistribution and use in source and binary forms, with or without | ||
6 | * modification, are permitted provided that the following conditions are met: | ||
7 | * * Redistributions of source code must retain the above copyright | ||
8 | * notice, this list of conditions and the following disclaimer. | ||
9 | * * Redistributions in binary form must reproduce the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer in the | ||
11 | * documentation and/or other materials provided with the distribution. | ||
12 | * * Neither the name of the OpenSim Project nor the | ||
13 | * names of its contributors may be used to endorse or promote products | ||
14 | * derived from this software without specific prior written permission. | ||
15 | * | ||
16 | * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY | ||
17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
19 | * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY | ||
20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | ||
23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
26 | */ | ||
27 | /* | ||
28 | * This file includes content derived from Obviex. | ||
29 | * Copyright (C) 2002 Obviex(TM). All rights reserved. | ||
30 | * http://www.obviex.com/samples/Encryption.aspx | ||
31 | */ | ||
32 | |||
33 | using System; | ||
34 | using System.Collections.Generic; | ||
35 | using System.IO; | ||
36 | using System.Reflection; | ||
37 | using System.Text; | ||
38 | using System.Xml.Serialization; | ||
39 | using log4net; | ||
40 | using OpenSim.Framework.Servers; | ||
41 | using System.Security.Cryptography; | ||
42 | |||
43 | namespace OpenSim.Framework.Communications.Cache | ||
44 | { | ||
45 | public class CryptoGridAssetClient : AssetServerBase | ||
46 | { | ||
47 | #region Keyfile Classes | ||
48 | [Serializable] | ||
49 | private class RjinKeyfile | ||
50 | { | ||
51 | public string Secret; | ||
52 | public string AlsoKnownAs; | ||
53 | public int Keysize; | ||
54 | public string IVBytes; | ||
55 | public string Description = "OpenSim Key"; | ||
56 | |||
57 | private static string SHA1Hash(byte[] bytes) | ||
58 | { | ||
59 | SHA1 sha1 = SHA1CryptoServiceProvider.Create(); | ||
60 | byte[] dataMd5 = sha1.ComputeHash(bytes); | ||
61 | StringBuilder sb = new StringBuilder(); | ||
62 | for (int i = 0; i < dataMd5.Length; i++) | ||
63 | sb.AppendFormat("{0:x2}", dataMd5[i]); | ||
64 | return sb.ToString(); | ||
65 | } | ||
66 | |||
67 | public void GenerateRandom() | ||
68 | { | ||
69 | RNGCryptoServiceProvider Gen = new RNGCryptoServiceProvider(); | ||
70 | |||
71 | byte[] genSec = new byte[32]; | ||
72 | byte[] genAKA = new byte[32]; | ||
73 | byte[] genIV = new byte[32]; | ||
74 | |||
75 | Gen.GetBytes(genSec); | ||
76 | Gen.GetBytes(genAKA); | ||
77 | Gen.GetBytes(genIV); | ||
78 | |||
79 | Secret = SHA1Hash(genSec); | ||
80 | AlsoKnownAs = SHA1Hash(genAKA); | ||
81 | IVBytes = SHA1Hash(genIV).Substring(0, 16); | ||
82 | Keysize = 256; | ||
83 | } | ||
84 | } | ||
85 | #endregion | ||
86 | |||
87 | #region Rjindael | ||
88 | /// <summary> | ||
89 | /// This class uses a symmetric key algorithm (Rijndael/AES) to encrypt and | ||
90 | /// decrypt data. As long as encryption and decryption routines use the same | ||
91 | /// parameters to generate the keys, the keys are guaranteed to be the same. | ||
92 | /// The class uses static functions with duplicate code to make it easier to | ||
93 | /// demonstrate encryption and decryption logic. In a real-life application, | ||
94 | /// this may not be the most efficient way of handling encryption, so - as | ||
95 | /// soon as you feel comfortable with it - you may want to redesign this class. | ||
96 | /// </summary> | ||
97 | private class UtilRijndael | ||
98 | { | ||
99 | /// <summary> | ||
100 | /// Encrypts specified plaintext using Rijndael symmetric key algorithm | ||
101 | /// and returns a base64-encoded result. | ||
102 | /// </summary> | ||
103 | /// <param name="plainText"> | ||
104 | /// Plaintext value to be encrypted. | ||
105 | /// </param> | ||
106 | /// <param name="passPhrase"> | ||
107 | /// Passphrase from which a pseudo-random password will be derived. The | ||
108 | /// derived password will be used to generate the encryption key. | ||
109 | /// Passphrase can be any string. In this example we assume that this | ||
110 | /// passphrase is an ASCII string. | ||
111 | /// </param> | ||
112 | /// <param name="saltValue"> | ||
113 | /// Salt value used along with passphrase to generate password. Salt can | ||
114 | /// be any string. In this example we assume that salt is an ASCII string. | ||
115 | /// </param> | ||
116 | /// <param name="hashAlgorithm"> | ||
117 | /// Hash algorithm used to generate password. Allowed values are: "MD5" and | ||
118 | /// "SHA1". SHA1 hashes are a bit slower, but more secure than MD5 hashes. | ||
119 | /// </param> | ||
120 | /// <param name="passwordIterations"> | ||
121 | /// Number of iterations used to generate password. One or two iterations | ||
122 | /// should be enough. | ||
123 | /// </param> | ||
124 | /// <param name="initVector"> | ||
125 | /// Initialization vector (or IV). This value is required to encrypt the | ||
126 | /// first block of plaintext data. For RijndaelManaged class IV must be | ||
127 | /// exactly 16 ASCII characters long. | ||
128 | /// </param> | ||
129 | /// <param name="keySize"> | ||
130 | /// Size of encryption key in bits. Allowed values are: 128, 192, and 256. | ||
131 | /// Longer keys are more secure than shorter keys. | ||
132 | /// </param> | ||
133 | /// <returns> | ||
134 | /// Encrypted value formatted as a base64-encoded string. | ||
135 | /// </returns> | ||
136 | public static byte[] Encrypt(byte[] plainText, | ||
137 | string passPhrase, | ||
138 | string saltValue, | ||
139 | string hashAlgorithm, | ||
140 | int passwordIterations, | ||
141 | string initVector, | ||
142 | int keySize) | ||
143 | { | ||
144 | // Convert strings into byte arrays. | ||
145 | // Let us assume that strings only contain ASCII codes. | ||
146 | // If strings include Unicode characters, use Unicode, UTF7, or UTF8 | ||
147 | // encoding. | ||
148 | byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector); | ||
149 | byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue); | ||
150 | |||
151 | // Convert our plaintext into a byte array. | ||
152 | // Let us assume that plaintext contains UTF8-encoded characters. | ||
153 | byte[] plainTextBytes = plainText; | ||
154 | |||
155 | // First, we must create a password, from which the key will be derived. | ||
156 | // This password will be generated from the specified passphrase and | ||
157 | // salt value. The password will be created using the specified hash | ||
158 | // algorithm. Password creation can be done in several iterations. | ||
159 | PasswordDeriveBytes password = new PasswordDeriveBytes( | ||
160 | passPhrase, | ||
161 | saltValueBytes, | ||
162 | hashAlgorithm, | ||
163 | passwordIterations); | ||
164 | |||
165 | // Use the password to generate pseudo-random bytes for the encryption | ||
166 | // key. Specify the size of the key in bytes (instead of bits). | ||
167 | byte[] keyBytes = password.GetBytes(keySize / 8); | ||
168 | |||
169 | // Create uninitialized Rijndael encryption object. | ||
170 | RijndaelManaged symmetricKey = new RijndaelManaged(); | ||
171 | |||
172 | // It is reasonable to set encryption mode to Cipher Block Chaining | ||
173 | // (CBC). Use default options for other symmetric key parameters. | ||
174 | symmetricKey.Mode = CipherMode.CBC; | ||
175 | |||
176 | // Generate encryptor from the existing key bytes and initialization | ||
177 | // vector. Key size will be defined based on the number of the key | ||
178 | // bytes. | ||
179 | ICryptoTransform encryptor = symmetricKey.CreateEncryptor( | ||
180 | keyBytes, | ||
181 | initVectorBytes); | ||
182 | |||
183 | // Define memory stream which will be used to hold encrypted data. | ||
184 | MemoryStream memoryStream = new MemoryStream(); | ||
185 | |||
186 | // Define cryptographic stream (always use Write mode for encryption). | ||
187 | CryptoStream cryptoStream = new CryptoStream(memoryStream, | ||
188 | encryptor, | ||
189 | CryptoStreamMode.Write); | ||
190 | // Start encrypting. | ||
191 | cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length); | ||
192 | |||
193 | // Finish encrypting. | ||
194 | cryptoStream.FlushFinalBlock(); | ||
195 | |||
196 | // Convert our encrypted data from a memory stream into a byte array. | ||
197 | byte[] cipherTextBytes = memoryStream.ToArray(); | ||
198 | |||
199 | // Close both streams. | ||
200 | memoryStream.Close(); | ||
201 | cryptoStream.Close(); | ||
202 | |||
203 | // Return encrypted string. | ||
204 | return cipherTextBytes; | ||
205 | } | ||
206 | |||
207 | /// <summary> | ||
208 | /// Decrypts specified ciphertext using Rijndael symmetric key algorithm. | ||
209 | /// </summary> | ||
210 | /// <param name="cipherText"> | ||
211 | /// Base64-formatted ciphertext value. | ||
212 | /// </param> | ||
213 | /// <param name="passPhrase"> | ||
214 | /// Passphrase from which a pseudo-random password will be derived. The | ||
215 | /// derived password will be used to generate the encryption key. | ||
216 | /// Passphrase can be any string. In this example we assume that this | ||
217 | /// passphrase is an ASCII string. | ||
218 | /// </param> | ||
219 | /// <param name="saltValue"> | ||
220 | /// Salt value used along with passphrase to generate password. Salt can | ||
221 | /// be any string. In this example we assume that salt is an ASCII string. | ||
222 | /// </param> | ||
223 | /// <param name="hashAlgorithm"> | ||
224 | /// Hash algorithm used to generate password. Allowed values are: "MD5" and | ||
225 | /// "SHA1". SHA1 hashes are a bit slower, but more secure than MD5 hashes. | ||
226 | /// </param> | ||
227 | /// <param name="passwordIterations"> | ||
228 | /// Number of iterations used to generate password. One or two iterations | ||
229 | /// should be enough. | ||
230 | /// </param> | ||
231 | /// <param name="initVector"> | ||
232 | /// Initialization vector (or IV). This value is required to encrypt the | ||
233 | /// first block of plaintext data. For RijndaelManaged class IV must be | ||
234 | /// exactly 16 ASCII characters long. | ||
235 | /// </param> | ||
236 | /// <param name="keySize"> | ||
237 | /// Size of encryption key in bits. Allowed values are: 128, 192, and 256. | ||
238 | /// Longer keys are more secure than shorter keys. | ||
239 | /// </param> | ||
240 | /// <returns> | ||
241 | /// Decrypted string value. | ||
242 | /// </returns> | ||
243 | /// <remarks> | ||
244 | /// Most of the logic in this function is similar to the Encrypt | ||
245 | /// logic. In order for decryption to work, all parameters of this function | ||
246 | /// - except cipherText value - must match the corresponding parameters of | ||
247 | /// the Encrypt function which was called to generate the | ||
248 | /// ciphertext. | ||
249 | /// </remarks> | ||
250 | public static byte[] Decrypt(byte[] cipherText, | ||
251 | string passPhrase, | ||
252 | string saltValue, | ||
253 | string hashAlgorithm, | ||
254 | int passwordIterations, | ||
255 | string initVector, | ||
256 | int keySize) | ||
257 | { | ||
258 | // Convert strings defining encryption key characteristics into byte | ||
259 | // arrays. Let us assume that strings only contain ASCII codes. | ||
260 | // If strings include Unicode characters, use Unicode, UTF7, or UTF8 | ||
261 | // encoding. | ||
262 | byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector); | ||
263 | byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue); | ||
264 | |||
265 | // Convert our ciphertext into a byte array. | ||
266 | byte[] cipherTextBytes = cipherText; | ||
267 | |||
268 | // First, we must create a password, from which the key will be | ||
269 | // derived. This password will be generated from the specified | ||
270 | // passphrase and salt value. The password will be created using | ||
271 | // the specified hash algorithm. Password creation can be done in | ||
272 | // several iterations. | ||
273 | PasswordDeriveBytes password = new PasswordDeriveBytes( | ||
274 | passPhrase, | ||
275 | saltValueBytes, | ||
276 | hashAlgorithm, | ||
277 | passwordIterations); | ||
278 | |||
279 | // Use the password to generate pseudo-random bytes for the encryption | ||
280 | // key. Specify the size of the key in bytes (instead of bits). | ||
281 | byte[] keyBytes = password.GetBytes(keySize / 8); | ||
282 | |||
283 | // Create uninitialized Rijndael encryption object. | ||
284 | RijndaelManaged symmetricKey = new RijndaelManaged(); | ||
285 | |||
286 | // It is reasonable to set encryption mode to Cipher Block Chaining | ||
287 | // (CBC). Use default options for other symmetric key parameters. | ||
288 | symmetricKey.Mode = CipherMode.CBC; | ||
289 | |||
290 | // Generate decryptor from the existing key bytes and initialization | ||
291 | // vector. Key size will be defined based on the number of the key | ||
292 | // bytes. | ||
293 | ICryptoTransform decryptor = symmetricKey.CreateDecryptor( | ||
294 | keyBytes, | ||
295 | initVectorBytes); | ||
296 | |||
297 | // Define memory stream which will be used to hold encrypted data. | ||
298 | MemoryStream memoryStream = new MemoryStream(cipherTextBytes); | ||
299 | |||
300 | // Define cryptographic stream (always use Read mode for encryption). | ||
301 | CryptoStream cryptoStream = new CryptoStream(memoryStream, | ||
302 | decryptor, | ||
303 | CryptoStreamMode.Read); | ||
304 | |||
305 | // Since at this point we don't know what the size of decrypted data | ||
306 | // will be, allocate the buffer long enough to hold ciphertext; | ||
307 | // plaintext is never longer than ciphertext. | ||
308 | byte[] plainTextBytes = new byte[cipherTextBytes.Length]; | ||
309 | |||
310 | // Start decrypting. | ||
311 | int decryptedByteCount = cryptoStream.Read(plainTextBytes, | ||
312 | 0, | ||
313 | plainTextBytes.Length); | ||
314 | |||
315 | // Close both streams. | ||
316 | memoryStream.Close(); | ||
317 | cryptoStream.Close(); | ||
318 | |||
319 | byte[] plainText = new byte[decryptedByteCount]; | ||
320 | int i; | ||
321 | for (i = 0; i < decryptedByteCount; i++) | ||
322 | plainText[i] = plainTextBytes[i]; | ||
323 | |||
324 | // Return decrypted string. | ||
325 | return plainText; | ||
326 | } | ||
327 | } | ||
328 | #endregion | ||
329 | |||
330 | private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); | ||
331 | |||
332 | private readonly string _assetServerUrl; | ||
333 | private readonly bool m_encryptOnUpload; | ||
334 | private readonly RjinKeyfile m_encryptKey; | ||
335 | private readonly Dictionary<string,RjinKeyfile> m_keyfiles = new Dictionary<string, RjinKeyfile>(); | ||
336 | |||
337 | public CryptoGridAssetClient(string serverUrl, string keydir, bool decOnly) | ||
338 | { | ||
339 | _assetServerUrl = serverUrl; | ||
340 | |||
341 | string[] keys = Directory.GetFiles(keydir, "*.deckey"); | ||
342 | foreach (string key in keys) | ||
343 | { | ||
344 | XmlSerializer xs = new XmlSerializer(typeof (RjinKeyfile)); | ||
345 | FileStream file = new FileStream(key, FileMode.Open, FileAccess.Read); | ||
346 | |||
347 | RjinKeyfile rjkey = (RjinKeyfile) xs.Deserialize(file); | ||
348 | |||
349 | file.Close(); | ||
350 | |||
351 | m_keyfiles.Add(rjkey.AlsoKnownAs, rjkey); | ||
352 | } | ||
353 | |||
354 | |||
355 | keys = Directory.GetFiles(keydir, "*.enckey"); | ||
356 | if (keys.Length == 1) | ||
357 | { | ||
358 | string Ekey = keys[0]; | ||
359 | XmlSerializer Exs = new XmlSerializer(typeof (RjinKeyfile)); | ||
360 | FileStream Efile = new FileStream(Ekey, FileMode.Open, FileAccess.Read); | ||
361 | |||
362 | RjinKeyfile Erjkey = (RjinKeyfile) Exs.Deserialize(Efile); | ||
363 | |||
364 | Efile.Close(); | ||
365 | |||
366 | m_keyfiles.Add(Erjkey.AlsoKnownAs, Erjkey); | ||
367 | |||
368 | m_encryptKey = Erjkey; | ||
369 | } else | ||
370 | { | ||
371 | if (keys.Length > 1) | ||
372 | throw new Exception( | ||
373 | "You have more than one asset *encryption* key. (You should never have more than one)," + | ||
374 | "If you downloaded this key from someone, rename it to <filename>.deckey to convert it to" + | ||
375 | "a decryption-only key."); | ||
376 | |||
377 | m_log.Warn("No encryption key found, generating a new one for you..."); | ||
378 | RjinKeyfile encKey = new RjinKeyfile(); | ||
379 | encKey.GenerateRandom(); | ||
380 | |||
381 | m_encryptKey = encKey; | ||
382 | |||
383 | FileStream encExportFile = new FileStream("mysecretkey_rename_me.enckey",FileMode.CreateNew); | ||
384 | XmlSerializer xs = new XmlSerializer(typeof(RjinKeyfile)); | ||
385 | xs.Serialize(encExportFile, encKey); | ||
386 | encExportFile.Flush(); | ||
387 | encExportFile.Close(); | ||
388 | |||
389 | m_log.Info( | ||
390 | "Encryption file generated, please rename 'mysecretkey_rename_me.enckey' to something more appropriate (however preserve the file extension)."); | ||
391 | } | ||
392 | |||
393 | // If Decrypt-Only, dont encrypt on upload | ||
394 | m_encryptOnUpload = !decOnly; | ||
395 | } | ||
396 | |||
397 | private static void EncryptAssetBase(AssetBase x, RjinKeyfile file) | ||
398 | { | ||
399 | // Make a salt | ||
400 | RNGCryptoServiceProvider RandomGen = new RNGCryptoServiceProvider(); | ||
401 | byte[] rand = new byte[32]; | ||
402 | RandomGen.GetBytes(rand); | ||
403 | |||
404 | string salt = Convert.ToBase64String(rand); | ||
405 | |||
406 | x.Data = UtilRijndael.Encrypt(x.Data, file.Secret, salt, "SHA1", 2, file.IVBytes, file.Keysize); | ||
407 | x.Description = String.Format("ENCASS#:~:#{0}#:~:#{1}#:~:#{2}#:~:#{3}", | ||
408 | "OPENSIM_AES_AF1", | ||
409 | file.AlsoKnownAs, | ||
410 | salt, | ||
411 | x.Description); | ||
412 | } | ||
413 | |||
414 | private bool DecryptAssetBase(AssetBase x) | ||
415 | { | ||
416 | // Check it's encrypted first. | ||
417 | if (!x.Description.Contains("ENCASS")) | ||
418 | return true; | ||
419 | |||
420 | // ENCASS:ALG:AKA:SALT:Description | ||
421 | // 0 1 2 3 4 | ||
422 | string[] splitchars = new string[1]; | ||
423 | splitchars[0] = "#:~:#"; | ||
424 | |||
425 | string[] meta = x.Description.Split(splitchars, StringSplitOptions.None); | ||
426 | if (meta.Length < 5) | ||
427 | { | ||
428 | m_log.Warn("[ENCASSETS] Recieved Encrypted Asset, but header is corrupt"); | ||
429 | return false; | ||
430 | } | ||
431 | |||
432 | // Check if we have a matching key | ||
433 | if (m_keyfiles.ContainsKey(meta[2])) | ||
434 | { | ||
435 | RjinKeyfile deckey = m_keyfiles[meta[2]]; | ||
436 | x.Description = meta[4]; | ||
437 | switch (meta[1]) | ||
438 | { | ||
439 | case "OPENSIM_AES_AF1": | ||
440 | x.Data = UtilRijndael.Decrypt(x.Data, | ||
441 | deckey.Secret, | ||
442 | meta[3], | ||
443 | "SHA1", | ||
444 | 2, | ||
445 | deckey.IVBytes, | ||
446 | deckey.Keysize); | ||
447 | // Decrypted Successfully | ||
448 | return true; | ||
449 | default: | ||
450 | m_log.Warn( | ||
451 | "[ENCASSETS] Recieved Encrypted Asset, but we dont know how to decrypt '" + meta[1] + "'."); | ||
452 | // We dont understand this encryption scheme | ||
453 | return false; | ||
454 | } | ||
455 | } | ||
456 | |||
457 | m_log.Warn("[ENCASSETS] Recieved Encrypted Asset, but we do not have the decryption key."); | ||
458 | return false; | ||
459 | } | ||
460 | |||
461 | #region IAssetServer Members | ||
462 | |||
463 | protected override AssetBase GetAsset(AssetRequest req) | ||
464 | { | ||
465 | #if DEBUG | ||
466 | //m_log.DebugFormat("[GRID ASSET CLIENT]: Querying for {0}", req.AssetID.ToString()); | ||
467 | #endif | ||
468 | |||
469 | RestClient rc = new RestClient(_assetServerUrl); | ||
470 | rc.AddResourcePath("assets"); | ||
471 | rc.AddResourcePath(req.AssetID.ToString()); | ||
472 | if (req.IsTexture) | ||
473 | rc.AddQueryParameter("texture"); | ||
474 | |||
475 | rc.RequestMethod = "GET"; | ||
476 | |||
477 | Stream s = rc.Request(); | ||
478 | |||
479 | if (s == null) | ||
480 | return null; | ||
481 | |||
482 | if (s.Length > 0) | ||
483 | { | ||
484 | XmlSerializer xs = new XmlSerializer(typeof(AssetBase)); | ||
485 | |||
486 | AssetBase encAsset = (AssetBase)xs.Deserialize(s); | ||
487 | |||
488 | // Try decrypt it | ||
489 | if (DecryptAssetBase(encAsset)) | ||
490 | return encAsset; | ||
491 | } | ||
492 | |||
493 | return null; | ||
494 | } | ||
495 | |||
496 | public override void UpdateAsset(AssetBase asset) | ||
497 | { | ||
498 | throw new Exception("The method or operation is not implemented."); | ||
499 | } | ||
500 | |||
501 | public override void StoreAsset(AssetBase asset) | ||
502 | { | ||
503 | if (m_encryptOnUpload) | ||
504 | EncryptAssetBase(asset, m_encryptKey); | ||
505 | |||
506 | try | ||
507 | { | ||
508 | string assetUrl = _assetServerUrl + "/assets/"; | ||
509 | |||
510 | m_log.InfoFormat("[CRYPTO GRID ASSET CLIENT]: Sending store request for asset {0}", asset.FullID); | ||
511 | |||
512 | RestObjectPoster.BeginPostObject<AssetBase>(assetUrl, asset); | ||
513 | } | ||
514 | catch (Exception e) | ||
515 | { | ||
516 | m_log.ErrorFormat("[CRYPTO GRID ASSET CLIENT]: {0}", e); | ||
517 | } | ||
518 | } | ||
519 | |||
520 | public override void Close() | ||
521 | { | ||
522 | throw new Exception("The method or operation is not implemented."); | ||
523 | } | ||
524 | |||
525 | #endregion | ||
526 | } | ||
527 | } | ||