|
1 /* |
|
2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: . |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 // INCLUDES |
|
22 #include <e32std.h> |
|
23 #include "srtpmasterkey.h" |
|
24 #include "srtpmastersalt.h" |
|
25 #include "srtpcryptohandler.h" |
|
26 #include "srtpdef.h" |
|
27 #include "srtpcryptocontext.h" |
|
28 #include "srtpcryptoparams.h" |
|
29 |
|
30 |
|
31 // --------------------------------------------------------------------------- |
|
32 // Two-phased constructor. Used when stream uses its own cryptographic context |
|
33 // |
|
34 // --------------------------------------------------------------------------- |
|
35 // |
|
36 EXPORT_C CSRTPCryptoContext* CSRTPCryptoContext::NewL( const CSRTPMasterKey* aKey, |
|
37 const CSRTPMasterSalt* aSalt, |
|
38 const TSrtpCryptoParams& aCryptoParams) |
|
39 { |
|
40 |
|
41 |
|
42 CSRTPCryptoContext* self = CSRTPCryptoContext::NewLC( aKey, |
|
43 aSalt, |
|
44 aCryptoParams ); |
|
45 CleanupStack::Pop( self ); |
|
46 |
|
47 return self; |
|
48 } |
|
49 |
|
50 // --------------------------------------------------------------------------- |
|
51 // Two-phased constructor. Used when stream uses its own cryptographic context |
|
52 // |
|
53 // --------------------------------------------------------------------------- |
|
54 // |
|
55 EXPORT_C CSRTPCryptoContext* CSRTPCryptoContext::NewLC( const CSRTPMasterKey* aKey, |
|
56 const CSRTPMasterSalt* aSalt, |
|
57 const TSrtpCryptoParams& aCryptoParams) |
|
58 { |
|
59 |
|
60 CSRTPCryptoContext* self = new( ELeave )CSRTPCryptoContext( aCryptoParams ); |
|
61 |
|
62 |
|
63 CleanupStack::PushL( self ); |
|
64 self->ConstructL( aKey, aSalt ); |
|
65 |
|
66 return self; |
|
67 } |
|
68 |
|
69 // --------------------------------------------------------------------------- |
|
70 // CSRTPCryptoContext::CSRTPCryptoContext |
|
71 // --------------------------------------------------------------------------- |
|
72 // |
|
73 CSRTPCryptoContext::CSRTPCryptoContext( const TSrtpCryptoParams& aCryptoParams) : |
|
74 iHandlerList(CSRTPCryptoHandler::iHandlerOffset), |
|
75 iHandlerIter( iHandlerList ), |
|
76 iCryptoParams (aCryptoParams) |
|
77 |
|
78 { |
|
79 } |
|
80 |
|
81 |
|
82 // ----------------------------------------------------------------------------- |
|
83 // CSRTPCryptoContext::ConstructL |
|
84 // ----------------------------------------------------------------------------- |
|
85 // |
|
86 void CSRTPCryptoContext::ConstructL( const CSRTPMasterKey* aKey, |
|
87 const CSRTPMasterSalt* aSalt) |
|
88 { |
|
89 if( !aKey || !aSalt ) |
|
90 { |
|
91 User::Leave( KErrNoMemory ); |
|
92 } |
|
93 else |
|
94 { |
|
95 iKey = aKey; |
|
96 iSalt = aSalt; |
|
97 } |
|
98 |
|
99 if (!Valid()) |
|
100 { |
|
101 User::Leave(KErrArgument); |
|
102 } |
|
103 } |
|
104 |
|
105 // --------------------------------------------------------------------------- |
|
106 // CSRTPCryptoContext::CSRTPCryptoContext |
|
107 // --------------------------------------------------------------------------- |
|
108 // |
|
109 CSRTPCryptoContext::~CSRTPCryptoContext( ) |
|
110 |
|
111 { |
|
112 delete iKey; iKey=NULL; |
|
113 delete iSalt; iSalt=NULL; |
|
114 iHandlerList.Reset(); |
|
115 } |
|
116 |
|
117 |
|
118 // --------------------------------------------------------------------------- |
|
119 // CSRTPCryptoContext::SetMasterKey() |
|
120 // --------------------------------------------------------------------------- |
|
121 // |
|
122 EXPORT_C void CSRTPCryptoContext::SetMasterKey(const CSRTPMasterKey* aKey) |
|
123 { |
|
124 if (iKey) |
|
125 { |
|
126 delete iKey; |
|
127 iKey=NULL; |
|
128 } |
|
129 iKey = aKey; |
|
130 |
|
131 CSRTPCryptoHandler* handler; |
|
132 iHandlerIter.SetToFirst(); |
|
133 while( ( handler = iHandlerIter++ ) != NULL ) |
|
134 { |
|
135 handler->SRTPMasterKeyChanged(); |
|
136 } |
|
137 } |
|
138 |
|
139 |
|
140 // --------------------------------------------------------------------------- |
|
141 // CSRTPCryptoContext::SetMasterSalt() |
|
142 // --------------------------------------------------------------------------- |
|
143 // |
|
144 EXPORT_C void CSRTPCryptoContext::SetMasterSalt(const CSRTPMasterSalt* aSalt) |
|
145 { |
|
146 if(iSalt) |
|
147 { |
|
148 delete iSalt; |
|
149 iSalt = NULL; |
|
150 } |
|
151 iSalt = aSalt; |
|
152 |
|
153 CSRTPCryptoHandler* handler; |
|
154 iHandlerIter.SetToFirst(); |
|
155 while( ( handler = iHandlerIter++ ) != NULL ) |
|
156 { |
|
157 handler->SRTPMasterSaltChanged(); |
|
158 } |
|
159 } |
|
160 |
|
161 |
|
162 |
|
163 |
|
164 // --------------------------------------------------------------------------- |
|
165 // CSRTPCryptoContext::AddCryptoChangeObserver() |
|
166 // --------------------------------------------------------------------------- |
|
167 // |
|
168 void CSRTPCryptoContext::AddCryptoChangeObserver(CSRTPCryptoHandler *aObserver) |
|
169 { |
|
170 iHandlerList.AddLast(*aObserver); |
|
171 } |
|
172 |
|
173 // --------------------------------------------------------------------------- |
|
174 // CSRTPCryptoContext::RemoveCryptoChangeObserver() |
|
175 // --------------------------------------------------------------------------- |
|
176 // |
|
177 void CSRTPCryptoContext::RemoveCryptoChangeObserver(CSRTPCryptoHandler *aObserver) |
|
178 { |
|
179 if (!iHandlerList.IsEmpty() && FindHandler(aObserver)) |
|
180 { |
|
181 iHandlerList.Remove(*aObserver); |
|
182 } |
|
183 } |
|
184 // --------------------------------------------------------------------------- |
|
185 // CSRTPCryptoContext::MasterKey() |
|
186 // --------------------------------------------------------------------------- |
|
187 // |
|
188 EXPORT_C const CSRTPMasterKey& CSRTPCryptoContext::MasterKey() const |
|
189 { |
|
190 return *iKey; |
|
191 } |
|
192 // --------------------------------------------------------------------------- |
|
193 // CSRTPCryptoContext::MasterSalt() |
|
194 // --------------------------------------------------------------------------- |
|
195 // |
|
196 EXPORT_C const CSRTPMasterSalt& CSRTPCryptoContext::MasterSalt() const |
|
197 { |
|
198 return *iSalt; |
|
199 } |
|
200 |
|
201 // --------------------------------------------------------------------------- |
|
202 // CSRTPCryptoContext::CryptoParams() |
|
203 // --------------------------------------------------------------------------- |
|
204 // |
|
205 EXPORT_C const TSrtpCryptoParams& CSRTPCryptoContext::CryptoParams() |
|
206 { |
|
207 return iCryptoParams; |
|
208 } |
|
209 |
|
210 // --------------------------------------------------------------------------- |
|
211 // CSRTPCryptoContext::SetRCCm3Sync() |
|
212 // --------------------------------------------------------------------------- |
|
213 // |
|
214 EXPORT_C void CSRTPCryptoContext::SetRCCm3Sync(TBool aSync) |
|
215 { |
|
216 iCryptoParams.iIsRCCm3Sync = aSync; |
|
217 } |
|
218 |
|
219 // --------------------------------------------------------------------------- |
|
220 // CSRTPCryptoContext::IsEqual() |
|
221 // --------------------------------------------------------------------------- |
|
222 // |
|
223 TBool CSRTPCryptoContext::IsEqual(const CSRTPCryptoContext& aContext) |
|
224 { |
|
225 TBool isEqual= EFalse; |
|
226 if (!aContext.iKey->iKey->Compare(iKey->iKey->Des()) && |
|
227 !aContext.iSalt->iKey->Compare(iSalt->iKey->Des()) && |
|
228 !aContext.iKey->iMKI->Compare(iKey->iMKI->Des())) |
|
229 { |
|
230 if (aContext.iCryptoParams.iSrtpEncAlg==iCryptoParams.iSrtpEncAlg && |
|
231 aContext.iCryptoParams.iSrtpEncAlg==iCryptoParams.iSrtcpEncAlg && |
|
232 aContext.iCryptoParams.iSrtpAuthAlg==iCryptoParams.iSrtpAuthAlg && |
|
233 aContext.iCryptoParams.iSrtcpAuthAlg==iCryptoParams.iSrtcpAuthAlg && |
|
234 aContext.iCryptoParams.iSrtpAuthTagLen==iCryptoParams.iSrtpAuthTagLen && |
|
235 aContext.iCryptoParams.iSrtcpAuthTagLen==iCryptoParams.iSrtcpAuthTagLen && |
|
236 aContext.iCryptoParams.iSrtpKeyDervRate==iCryptoParams.iSrtpKeyDervRate && |
|
237 aContext.iCryptoParams.iSrtcpKeyDervRate==iCryptoParams.iSrtcpKeyDervRate && |
|
238 aContext.iCryptoParams.iSrtpReplayProtection==iCryptoParams.iSrtpReplayProtection && |
|
239 aContext.iCryptoParams.iSrtcpReplayProtection==iCryptoParams.iSrtcpReplayProtection && |
|
240 aContext.iCryptoParams.iROCTransRate==iCryptoParams.iROCTransRate && |
|
241 aContext.iCryptoParams.iMasterKeysLifeTime==iCryptoParams.iMasterKeysLifeTime && |
|
242 aContext.iCryptoParams.iReplayWindowSizeHint==iCryptoParams.iReplayWindowSizeHint && |
|
243 aContext.iCryptoParams.iIsRCCm3Sync==iCryptoParams.iIsRCCm3Sync) |
|
244 return !isEqual; |
|
245 } |
|
246 return isEqual; |
|
247 } |
|
248 |
|
249 // --------------------------------------------------------------------------- |
|
250 // CSRTPCryptoContext::operator= |
|
251 // --------------------------------------------------------------------------- |
|
252 // |
|
253 const CSRTPCryptoContext& CSRTPCryptoContext::operator=(const CSRTPCryptoContext& aContext) |
|
254 { |
|
255 return aContext; |
|
256 } |
|
257 |
|
258 // --------------------------------------------------------------------------- |
|
259 // CSRTPCryptoContext::UpdateCryptoParams |
|
260 // --------------------------------------------------------------------------- |
|
261 // |
|
262 void CSRTPCryptoContext::UpdateCryptoParams(const TSrtpCryptoParams& aCryptoParams ) |
|
263 { |
|
264 iCryptoParams = aCryptoParams; |
|
265 } |
|
266 |
|
267 // --------------------------------------------------------------------------- |
|
268 // CSRTPCryptoContext::FindCryptoHandler |
|
269 // --------------------------------------------------------------------------- |
|
270 // |
|
271 |
|
272 TBool CSRTPCryptoContext::FindHandler( CSRTPCryptoHandler *aObserver ) |
|
273 { |
|
274 TBool found=EFalse; |
|
275 CSRTPCryptoHandler* handler=NULL; |
|
276 |
|
277 iHandlerIter.SetToFirst(); |
|
278 handler =iHandlerIter; |
|
279 while ((handler=iHandlerIter++)!=NULL) |
|
280 { |
|
281 if (handler == aObserver) |
|
282 { |
|
283 found = ETrue; |
|
284 return found; |
|
285 } |
|
286 } |
|
287 return found; |
|
288 } |
|
289 |
|
290 // --------------------------------------------------------------------------- |
|
291 // CSRTPCryptoContext::Valid() |
|
292 // --------------------------------------------------------------------------- |
|
293 // |
|
294 EXPORT_C TBool CSRTPCryptoContext::Valid() const |
|
295 { |
|
296 if (!(iKey->Valid())) |
|
297 { |
|
298 return EFalse; |
|
299 } |
|
300 |
|
301 if (!(iSalt->Valid())) |
|
302 { |
|
303 return EFalse; |
|
304 } |
|
305 |
|
306 if ((iCryptoParams.iSrtpEncAlg!=EEncAES_CM && |
|
307 iCryptoParams.iSrtpEncAlg!=ENullAlg) ||( |
|
308 iCryptoParams.iSrtcpEncAlg!=EEncAES_CM && |
|
309 iCryptoParams.iSrtcpEncAlg!=ENullAlg)) |
|
310 { |
|
311 return EFalse; |
|
312 } |
|
313 |
|
314 if ((iCryptoParams.iSrtpAuthAlg!=EAuthHMAC_SHA1 && |
|
315 iCryptoParams.iSrtpAuthAlg!=EAuthNull && |
|
316 iCryptoParams.iSrtpAuthAlg!=EAuthRCCm1 && |
|
317 iCryptoParams.iSrtpAuthAlg!=EAuthRCCm2 && |
|
318 iCryptoParams.iSrtpAuthAlg!=EAuthRCCm3 ) || |
|
319 (iCryptoParams.iSrtcpAuthAlg!=EAuthHMAC_SHA1 && |
|
320 iCryptoParams.iSrtcpAuthAlg!=EAuthNull )) |
|
321 { |
|
322 return EFalse; |
|
323 } |
|
324 if (iCryptoParams.iSrtpAuthAlg==EAuthHMAC_SHA1 && |
|
325 (iCryptoParams.iSrtpAuthTagLen!=KSRTPAuthTagLength80 && |
|
326 iCryptoParams.iSrtpAuthTagLen!=KSRTPAuthTagLength32 |
|
327 )) |
|
328 { |
|
329 return EFalse; |
|
330 } |
|
331 |
|
332 if (iCryptoParams.iSrtcpAuthAlg==EAuthHMAC_SHA1 && |
|
333 (iCryptoParams.iSrtcpAuthTagLen!=KSRTPAuthTagLength80 && |
|
334 iCryptoParams.iSrtcpAuthTagLen!=KSRTPAuthTagLength32 |
|
335 )) |
|
336 { |
|
337 return EFalse; |
|
338 } |
|
339 if ((iCryptoParams.iSrtpAuthAlg==EAuthRCCm1 || |
|
340 iCryptoParams.iSrtpAuthAlg==EAuthRCCm2 ) && |
|
341 iCryptoParams.iSrtpAuthTagLen != KSRTPAuthTagLength112) |
|
342 { |
|
343 return EFalse; |
|
344 } |
|
345 if (iCryptoParams.iSrtpAuthAlg==EAuthRCCm3 && |
|
346 iCryptoParams.iSrtpAuthTagLen != KSRTPAuthTagLength32) |
|
347 { |
|
348 return EFalse; |
|
349 } |
|
350 if ((iCryptoParams.iSrtpAuthAlg==EAuthNull && |
|
351 iCryptoParams.iSrtpAuthTagLen != 0)||( |
|
352 iCryptoParams.iSrtcpAuthAlg==EAuthNull && |
|
353 iCryptoParams.iSrtcpAuthTagLen != 0)) |
|
354 { |
|
355 return EFalse; |
|
356 } |
|
357 |
|
358 if (iCryptoParams.iPrefixLen!=KSRTPPrefixLength) |
|
359 { |
|
360 return EFalse; |
|
361 } |
|
362 |
|
363 if (!iCryptoParams.iROCTransRate) |
|
364 { |
|
365 return EFalse; |
|
366 } |
|
367 |
|
368 return ETrue; |
|
369 } |
|
370 |