J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Portions Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | */ |
| 4 | |
| 5 | /* Copyright (c) 2002 Graz University of Technology. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions are met: |
| 9 | * |
| 10 | * 1. Redistributions of source code must retain the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer. |
| 12 | * |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 14 | * this list of conditions and the following disclaimer in the documentation |
| 15 | * and/or other materials provided with the distribution. |
| 16 | * |
| 17 | * 3. The end-user documentation included with the redistribution, if any, must |
| 18 | * include the following acknowledgment: |
| 19 | * |
| 20 | * "This product includes software developed by IAIK of Graz University of |
| 21 | * Technology." |
| 22 | * |
| 23 | * Alternately, this acknowledgment may appear in the software itself, if |
| 24 | * and wherever such third-party acknowledgments normally appear. |
| 25 | * |
| 26 | * 4. The names "Graz University of Technology" and "IAIK of Graz University of |
| 27 | * Technology" must not be used to endorse or promote products derived from |
| 28 | * this software without prior written permission. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called |
| 31 | * "IAIK PKCS Wrapper", nor may "IAIK" appear in their name, without prior |
| 32 | * written permission of Graz University of Technology. |
| 33 | * |
| 34 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED |
| 35 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 36 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 37 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE |
| 38 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| 39 | * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 40 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| 41 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 42 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 43 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 44 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 45 | * POSSIBILITY OF SUCH DAMAGE. |
| 46 | */ |
| 47 | |
| 48 | #include "pkcs11wrapper.h" |
| 49 | |
| 50 | #include <stdio.h> |
| 51 | #include <stdlib.h> |
| 52 | #include <string.h> |
| 53 | #include <assert.h> |
| 54 | |
| 55 | #include "sun_security_pkcs11_wrapper_PKCS11.h" |
| 56 | |
| 57 | /* The initArgs that enable the application to do custom mutex-handling */ |
| 58 | #ifndef NO_CALLBACKS |
| 59 | jobject jInitArgsObject; |
| 60 | CK_C_INITIALIZE_ARGS_PTR ckpGlobalInitArgs; |
| 61 | #endif /* NO_CALLBACKS */ |
| 62 | |
| 63 | /* ************************************************************************** */ |
| 64 | /* Now come the functions for mutex handling and notification callbacks */ |
| 65 | /* ************************************************************************** */ |
| 66 | |
| 67 | /* |
| 68 | * converts the InitArgs object to a CK_C_INITIALIZE_ARGS structure and sets the functions |
| 69 | * that will call the right Java mutex functions |
| 70 | * |
| 71 | * @param env - used to call JNI funktions to get the Java classes, objects, methods and fields |
| 72 | * @param pInitArgs - the InitArgs object with the Java mutex functions to call |
| 73 | * @return - the pointer to the CK_C_INITIALIZE_ARGS structure with the functions that will call |
| 74 | * the corresponding Java functions |
| 75 | */ |
| 76 | CK_C_INITIALIZE_ARGS_PTR makeCKInitArgsAdapter(JNIEnv *env, jobject jInitArgs) |
| 77 | { |
| 78 | CK_C_INITIALIZE_ARGS_PTR ckpInitArgs; |
| 79 | jclass jInitArgsClass = (*env)->FindClass(env, CLASS_C_INITIALIZE_ARGS); |
| 80 | jfieldID fieldID; |
| 81 | jlong jFlags; |
| 82 | jobject jReserved; |
| 83 | CK_ULONG ckReservedLength; |
| 84 | #ifndef NO_CALLBACKS |
| 85 | jobject jMutexHandler; |
| 86 | #endif /* NO_CALLBACKS */ |
| 87 | |
| 88 | if(jInitArgs == NULL) { |
| 89 | return NULL_PTR; |
| 90 | } |
| 91 | |
| 92 | /* convert the Java InitArgs object to a pointer to a CK_C_INITIALIZE_ARGS structure */ |
| 93 | ckpInitArgs = (CK_C_INITIALIZE_ARGS_PTR) malloc(sizeof(CK_C_INITIALIZE_ARGS)); |
| 94 | |
| 95 | /* Set the mutex functions that will call the Java mutex functions, but |
| 96 | * only set it, if the field is not null. |
| 97 | */ |
| 98 | #ifdef NO_CALLBACKS |
| 99 | ckpInitArgs->CreateMutex = NULL_PTR; |
| 100 | ckpInitArgs->DestroyMutex = NULL_PTR; |
| 101 | ckpInitArgs->LockMutex = NULL_PTR; |
| 102 | ckpInitArgs->UnlockMutex = NULL_PTR; |
| 103 | #else |
| 104 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "CreateMutex", "Lsun/security/pkcs11/wrapper/CK_CREATEMUTEX;"); |
| 105 | assert(fieldID != 0); |
| 106 | jMutexHandler = (*env)->GetObjectField(env, jInitArgs, fieldID); |
| 107 | ckpInitArgs->CreateMutex = (jMutexHandler != NULL) ? &callJCreateMutex : NULL_PTR; |
| 108 | |
| 109 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "DestroyMutex", "Lsun/security/pkcs11/wrapper/CK_DESTROYMUTEX;"); |
| 110 | assert(fieldID != 0); |
| 111 | jMutexHandler = (*env)->GetObjectField(env, jInitArgs, fieldID); |
| 112 | ckpInitArgs->DestroyMutex = (jMutexHandler != NULL) ? &callJDestroyMutex : NULL_PTR; |
| 113 | |
| 114 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "LockMutex", "Lsun/security/pkcs11/wrapper/CK_LOCKMUTEX;"); |
| 115 | assert(fieldID != 0); |
| 116 | jMutexHandler = (*env)->GetObjectField(env, jInitArgs, fieldID); |
| 117 | ckpInitArgs->LockMutex = (jMutexHandler != NULL) ? &callJLockMutex : NULL_PTR; |
| 118 | |
| 119 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "UnlockMutex", "Lsun/security/pkcs11/wrapper/CK_UNLOCKMUTEX;"); |
| 120 | assert(fieldID != 0); |
| 121 | jMutexHandler = (*env)->GetObjectField(env, jInitArgs, fieldID); |
| 122 | ckpInitArgs->UnlockMutex = (jMutexHandler != NULL) ? &callJUnlockMutex : NULL_PTR; |
| 123 | |
| 124 | if ((ckpInitArgs->CreateMutex != NULL_PTR) |
| 125 | || (ckpInitArgs->DestroyMutex != NULL_PTR) |
| 126 | || (ckpInitArgs->LockMutex != NULL_PTR) |
| 127 | || (ckpInitArgs->UnlockMutex != NULL_PTR)) { |
| 128 | /* we only need to keep a global copy, if we need callbacks */ |
| 129 | /* set the global object jInitArgs so that the right Java mutex functions will be called */ |
| 130 | jInitArgsObject = (*env)->NewGlobalRef(env, jInitArgs); |
| 131 | ckpGlobalInitArgs = (CK_C_INITIALIZE_ARGS_PTR) malloc(sizeof(CK_C_INITIALIZE_ARGS)); |
| 132 | memcpy(ckpGlobalInitArgs, ckpInitArgs, sizeof(CK_C_INITIALIZE_ARGS)); |
| 133 | } |
| 134 | #endif /* NO_CALLBACKS */ |
| 135 | |
| 136 | /* convert and set the flags field */ |
| 137 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "flags", "J"); |
| 138 | assert(fieldID != 0); |
| 139 | jFlags = (*env)->GetLongField(env, jInitArgs, fieldID); |
| 140 | ckpInitArgs->flags = jLongToCKULong(jFlags); |
| 141 | |
| 142 | /* pReserved should be NULL_PTR in this version */ |
| 143 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "pReserved", "Ljava/lang/Object;"); |
| 144 | assert(fieldID != 0); |
| 145 | jReserved = (*env)->GetObjectField(env, jInitArgs, fieldID); |
| 146 | |
| 147 | /* we try to convert the reserved parameter also */ |
| 148 | jObjectToPrimitiveCKObjectPtrPtr(env, jReserved, &(ckpInitArgs->pReserved), &ckReservedLength); |
| 149 | |
| 150 | return ckpInitArgs ; |
| 151 | } |
| 152 | |
| 153 | #ifndef NO_CALLBACKS |
| 154 | |
| 155 | /* |
| 156 | * is the function that gets called by PKCS#11 to create a mutex and calls the Java |
| 157 | * CreateMutex function |
| 158 | * |
| 159 | * @param env - used to call JNI funktions to get the Java classes, objects, methods and fields |
| 160 | * @param ppMutex - the new created mutex |
| 161 | * @return - should return CKR_OK if the mutex creation was ok |
| 162 | */ |
| 163 | CK_RV callJCreateMutex(CK_VOID_PTR_PTR ppMutex) |
| 164 | { |
| 165 | JavaVM *jvm; |
| 166 | JNIEnv *env; |
| 167 | jsize actualNumberVMs; |
| 168 | jint returnValue; |
| 169 | jthrowable pkcs11Exception; |
| 170 | jclass pkcs11ExceptionClass; |
| 171 | jlong errorCode; |
| 172 | CK_RV rv = CKR_OK; |
| 173 | int wasAttached = 1; |
| 174 | jclass jCreateMutexClass; |
| 175 | jclass jInitArgsClass; |
| 176 | jmethodID methodID; |
| 177 | jfieldID fieldID; |
| 178 | jobject jCreateMutex; |
| 179 | jobject jMutex; |
| 180 | |
| 181 | |
| 182 | /* Get the currently running Java VM */ |
| 183 | returnValue = JNI_GetCreatedJavaVMs(&jvm, (jsize) 1, &actualNumberVMs); |
| 184 | if ((returnValue != 0) || (actualNumberVMs <= 0)) { return rv ;} /* there is no VM running */ |
| 185 | |
| 186 | /* Determine, if current thread is already attached */ |
| 187 | returnValue = (*jvm)->GetEnv(jvm, (void **) &env, JNI_VERSION_1_2); |
| 188 | if (returnValue == JNI_EDETACHED) { |
| 189 | /* thread detached, so attach it */ |
| 190 | wasAttached = 0; |
| 191 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 192 | } else if (returnValue == JNI_EVERSION) { |
| 193 | /* this version of JNI is not supported, so just try to attach */ |
| 194 | /* we assume it was attached to ensure that this thread is not detached |
| 195 | * afterwards even though it should not |
| 196 | */ |
| 197 | wasAttached = 1; |
| 198 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 199 | } else { |
| 200 | /* attached */ |
| 201 | wasAttached = 1; |
| 202 | } |
| 203 | |
| 204 | |
| 205 | jCreateMutexClass = (*env)->FindClass(env, CLASS_CREATEMUTEX); |
| 206 | jInitArgsClass = (*env)->FindClass(env, CLASS_C_INITIALIZE_ARGS); |
| 207 | |
| 208 | /* get the CreateMutex object out of the jInitArgs object */ |
| 209 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "CreateMutex", "Lsun/security/pkcs11/wrapper/CK_CREATEMUTEX;"); |
| 210 | assert(fieldID != 0); |
| 211 | jCreateMutex = (*env)->GetObjectField(env, jInitArgsObject, fieldID); |
| 212 | assert(jCreateMutex != 0); |
| 213 | |
| 214 | /* call the CK_CREATEMUTEX function of the CreateMutex object */ |
| 215 | /* and get the new Java mutex object */ |
| 216 | methodID = (*env)->GetMethodID(env, jCreateMutexClass, "CK_CREATEMUTEX", "()Ljava/lang/Object;"); |
| 217 | assert(methodID != 0); |
| 218 | jMutex = (*env)->CallObjectMethod(env, jCreateMutex, methodID); |
| 219 | |
| 220 | /* set a global reference on the Java mutex */ |
| 221 | jMutex = (*env)->NewGlobalRef(env, jMutex); |
| 222 | /* convert the Java mutex to a CK mutex */ |
| 223 | *ppMutex = jObjectToCKVoidPtr(jMutex); |
| 224 | |
| 225 | |
| 226 | /* check, if callback threw an exception */ |
| 227 | pkcs11Exception = (*env)->ExceptionOccurred(env); |
| 228 | |
| 229 | if (pkcs11Exception != NULL) { |
| 230 | /* The was an exception thrown, now we get the error-code from it */ |
| 231 | pkcs11ExceptionClass = (*env)->FindClass(env, CLASS_PKCS11EXCEPTION); |
| 232 | methodID = (*env)->GetMethodID(env, pkcs11ExceptionClass, "getErrorCode", "()J"); |
| 233 | assert(methodID != 0); |
| 234 | errorCode = (*env)->CallLongMethod(env, pkcs11Exception, methodID); |
| 235 | rv = jLongToCKULong(errorCode); |
| 236 | } |
| 237 | |
| 238 | /* if we attached this thread to the VM just for callback, we detach it now */ |
| 239 | if (wasAttached) { |
| 240 | returnValue = (*jvm)->DetachCurrentThread(jvm); |
| 241 | } |
| 242 | |
| 243 | return rv ; |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * is the function that gets called by PKCS#11 to destroy a mutex and calls the Java |
| 248 | * DestroyMutex function |
| 249 | * |
| 250 | * @param env - used to call JNI funktions to get the Java classes, objects, methods and fields |
| 251 | * @param pMutex - the mutex to destroy |
| 252 | * @return - should return CKR_OK if the mutex was destroyed |
| 253 | */ |
| 254 | CK_RV callJDestroyMutex(CK_VOID_PTR pMutex) |
| 255 | { |
| 256 | JavaVM *jvm; |
| 257 | JNIEnv *env; |
| 258 | jsize actualNumberVMs; |
| 259 | jint returnValue; |
| 260 | jthrowable pkcs11Exception; |
| 261 | jclass pkcs11ExceptionClass; |
| 262 | jlong errorCode; |
| 263 | CK_RV rv = CKR_OK; |
| 264 | int wasAttached = 1; |
| 265 | jclass jDestroyMutexClass; |
| 266 | jclass jInitArgsClass; |
| 267 | jmethodID methodID; |
| 268 | jfieldID fieldID; |
| 269 | jobject jDestroyMutex; |
| 270 | jobject jMutex; |
| 271 | |
| 272 | |
| 273 | /* Get the currently running Java VM */ |
| 274 | returnValue = JNI_GetCreatedJavaVMs(&jvm, (jsize) 1, &actualNumberVMs); |
| 275 | if ((returnValue != 0) || (actualNumberVMs <= 0)) { return rv ; } /* there is no VM running */ |
| 276 | |
| 277 | /* Determine, if current thread is already attached */ |
| 278 | returnValue = (*jvm)->GetEnv(jvm, (void **) &env, JNI_VERSION_1_2); |
| 279 | if (returnValue == JNI_EDETACHED) { |
| 280 | /* thread detached, so attach it */ |
| 281 | wasAttached = 0; |
| 282 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 283 | } else if (returnValue == JNI_EVERSION) { |
| 284 | /* this version of JNI is not supported, so just try to attach */ |
| 285 | /* we assume it was attached to ensure that this thread is not detached |
| 286 | * afterwards even though it should not |
| 287 | */ |
| 288 | wasAttached = 1; |
| 289 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 290 | } else { |
| 291 | /* attached */ |
| 292 | wasAttached = 1; |
| 293 | } |
| 294 | |
| 295 | |
| 296 | jDestroyMutexClass = (*env)->FindClass(env, CLASS_DESTROYMUTEX); |
| 297 | jInitArgsClass = (*env)->FindClass(env, CLASS_C_INITIALIZE_ARGS); |
| 298 | |
| 299 | /* convert the CK mutex to a Java mutex */ |
| 300 | jMutex = ckVoidPtrToJObject(pMutex); |
| 301 | |
| 302 | /* get the DestroyMutex object out of the jInitArgs object */ |
| 303 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "DestroyMutex", "Lsun/security/pkcs11/wrapper/CK_DESTROYMUTEX;"); |
| 304 | assert(fieldID != 0); |
| 305 | jDestroyMutex = (*env)->GetObjectField(env, jInitArgsObject, fieldID); |
| 306 | assert(jDestroyMutex != 0); |
| 307 | |
| 308 | /* call the CK_DESTROYMUTEX method of the DestroyMutex object */ |
| 309 | methodID = (*env)->GetMethodID(env, jDestroyMutexClass, "CK_DESTROYMUTEX", "(Ljava/lang/Object;)V"); |
| 310 | assert(methodID != 0); |
| 311 | (*env)->CallVoidMethod(env, jDestroyMutex, methodID, jMutex); |
| 312 | |
| 313 | /* delete the global reference on the Java mutex */ |
| 314 | (*env)->DeleteGlobalRef(env, jMutex); |
| 315 | |
| 316 | |
| 317 | /* check, if callback threw an exception */ |
| 318 | pkcs11Exception = (*env)->ExceptionOccurred(env); |
| 319 | |
| 320 | if (pkcs11Exception != NULL) { |
| 321 | /* The was an exception thrown, now we get the error-code from it */ |
| 322 | pkcs11ExceptionClass = (*env)->FindClass(env, CLASS_PKCS11EXCEPTION); |
| 323 | methodID = (*env)->GetMethodID(env, pkcs11ExceptionClass, "getErrorCode", "()J"); |
| 324 | assert(methodID != 0); |
| 325 | errorCode = (*env)->CallLongMethod(env, pkcs11Exception, methodID); |
| 326 | rv = jLongToCKULong(errorCode); |
| 327 | } |
| 328 | |
| 329 | /* if we attached this thread to the VM just for callback, we detach it now */ |
| 330 | if (wasAttached) { |
| 331 | returnValue = (*jvm)->DetachCurrentThread(jvm); |
| 332 | } |
| 333 | |
| 334 | return rv ; |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * is the function that gets called by PKCS#11 to lock a mutex and calls the Java |
| 339 | * LockMutex function |
| 340 | * |
| 341 | * @param env - used to call JNI funktions to get the Java classes, objects, methods and fields |
| 342 | * @param pMutex - the mutex to lock |
| 343 | * @return - should return CKR_OK if the mutex was not locked already |
| 344 | */ |
| 345 | CK_RV callJLockMutex(CK_VOID_PTR pMutex) |
| 346 | { |
| 347 | JavaVM *jvm; |
| 348 | JNIEnv *env; |
| 349 | jsize actualNumberVMs; |
| 350 | jint returnValue; |
| 351 | jthrowable pkcs11Exception; |
| 352 | jclass pkcs11ExceptionClass; |
| 353 | jlong errorCode; |
| 354 | CK_RV rv = CKR_OK; |
| 355 | int wasAttached = 1; |
| 356 | jclass jLockMutexClass; |
| 357 | jclass jInitArgsClass; |
| 358 | jmethodID methodID; |
| 359 | jfieldID fieldID; |
| 360 | jobject jLockMutex; |
| 361 | jobject jMutex; |
| 362 | |
| 363 | |
| 364 | /* Get the currently running Java VM */ |
| 365 | returnValue = JNI_GetCreatedJavaVMs(&jvm, (jsize) 1, &actualNumberVMs); |
| 366 | if ((returnValue != 0) || (actualNumberVMs <= 0)) { return rv ; } /* there is no VM running */ |
| 367 | |
| 368 | /* Determine, if current thread is already attached */ |
| 369 | returnValue = (*jvm)->GetEnv(jvm, (void **) &env, JNI_VERSION_1_2); |
| 370 | if (returnValue == JNI_EDETACHED) { |
| 371 | /* thread detached, so attach it */ |
| 372 | wasAttached = 0; |
| 373 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 374 | } else if (returnValue == JNI_EVERSION) { |
| 375 | /* this version of JNI is not supported, so just try to attach */ |
| 376 | /* we assume it was attached to ensure that this thread is not detached |
| 377 | * afterwards even though it should not |
| 378 | */ |
| 379 | wasAttached = 1; |
| 380 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 381 | } else { |
| 382 | /* attached */ |
| 383 | wasAttached = 1; |
| 384 | } |
| 385 | |
| 386 | |
| 387 | jLockMutexClass = (*env)->FindClass(env, CLASS_LOCKMUTEX); |
| 388 | jInitArgsClass = (*env)->FindClass(env, CLASS_C_INITIALIZE_ARGS); |
| 389 | |
| 390 | /* convert the CK mutex to a Java mutex */ |
| 391 | jMutex = ckVoidPtrToJObject(pMutex); |
| 392 | |
| 393 | /* get the LockMutex object out of the jInitArgs object */ |
| 394 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "LockMutex", "Lsun/security/pkcs11/wrapper/CK_LOCKMUTEX;"); |
| 395 | assert(fieldID != 0); |
| 396 | jLockMutex = (*env)->GetObjectField(env, jInitArgsObject, fieldID); |
| 397 | assert(jLockMutex != 0); |
| 398 | |
| 399 | /* call the CK_LOCKMUTEX method of the LockMutex object */ |
| 400 | methodID = (*env)->GetMethodID(env, jLockMutexClass, "CK_LOCKMUTEX", "(Ljava/lang/Object;)V"); |
| 401 | assert(methodID != 0); |
| 402 | (*env)->CallVoidMethod(env, jLockMutex, methodID, jMutex); |
| 403 | |
| 404 | |
| 405 | /* check, if callback threw an exception */ |
| 406 | pkcs11Exception = (*env)->ExceptionOccurred(env); |
| 407 | |
| 408 | if (pkcs11Exception != NULL) { |
| 409 | /* The was an exception thrown, now we get the error-code from it */ |
| 410 | pkcs11ExceptionClass = (*env)->FindClass(env, CLASS_PKCS11EXCEPTION); |
| 411 | methodID = (*env)->GetMethodID(env, pkcs11ExceptionClass, "getErrorCode", "()J"); |
| 412 | assert(methodID != 0); |
| 413 | errorCode = (*env)->CallLongMethod(env, pkcs11Exception, methodID); |
| 414 | rv = jLongToCKULong(errorCode); |
| 415 | } |
| 416 | |
| 417 | /* if we attached this thread to the VM just for callback, we detach it now */ |
| 418 | if (wasAttached) { |
| 419 | returnValue = (*jvm)->DetachCurrentThread(jvm); |
| 420 | } |
| 421 | |
| 422 | return rv ; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * is the function that gets called by PKCS#11 to unlock a mutex and calls the Java |
| 427 | * UnlockMutex function |
| 428 | * |
| 429 | * @param env - used to call JNI funktions to get the Java classes, objects, methods and fields |
| 430 | * @param pMutex - the mutex to unlock |
| 431 | * @return - should return CKR_OK if the mutex was not unlocked already |
| 432 | */ |
| 433 | CK_RV callJUnlockMutex(CK_VOID_PTR pMutex) |
| 434 | { |
| 435 | JavaVM *jvm; |
| 436 | JNIEnv *env; |
| 437 | jsize actualNumberVMs; |
| 438 | jint returnValue; |
| 439 | jthrowable pkcs11Exception; |
| 440 | jclass pkcs11ExceptionClass; |
| 441 | jlong errorCode; |
| 442 | CK_RV rv = CKR_OK; |
| 443 | int wasAttached = 1; |
| 444 | jclass jUnlockMutexClass; |
| 445 | jclass jInitArgsClass; |
| 446 | jmethodID methodID; |
| 447 | jfieldID fieldID; |
| 448 | jobject jUnlockMutex; |
| 449 | jobject jMutex; |
| 450 | |
| 451 | |
| 452 | /* Get the currently running Java VM */ |
| 453 | returnValue = JNI_GetCreatedJavaVMs(&jvm, (jsize) 1, &actualNumberVMs); |
| 454 | if ((returnValue != 0) || (actualNumberVMs <= 0)) { return rv ; } /* there is no VM running */ |
| 455 | |
| 456 | /* Determine, if current thread is already attached */ |
| 457 | returnValue = (*jvm)->GetEnv(jvm, (void **) &env, JNI_VERSION_1_2); |
| 458 | if (returnValue == JNI_EDETACHED) { |
| 459 | /* thread detached, so attach it */ |
| 460 | wasAttached = 0; |
| 461 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 462 | } else if (returnValue == JNI_EVERSION) { |
| 463 | /* this version of JNI is not supported, so just try to attach */ |
| 464 | /* we assume it was attached to ensure that this thread is not detached |
| 465 | * afterwards even though it should not |
| 466 | */ |
| 467 | wasAttached = 1; |
| 468 | returnValue = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL); |
| 469 | } else { |
| 470 | /* attached */ |
| 471 | wasAttached = 1; |
| 472 | } |
| 473 | |
| 474 | |
| 475 | jUnlockMutexClass = (*env)->FindClass(env, CLASS_UNLOCKMUTEX); |
| 476 | jInitArgsClass = (*env)->FindClass(env, CLASS_C_INITIALIZE_ARGS); |
| 477 | |
| 478 | /* convert the CK-type mutex to a Java mutex */ |
| 479 | jMutex = ckVoidPtrToJObject(pMutex); |
| 480 | |
| 481 | /* get the UnlockMutex object out of the jInitArgs object */ |
| 482 | fieldID = (*env)->GetFieldID(env, jInitArgsClass, "UnlockMutex", "Lsun/security/pkcs11/wrapper/CK_UNLOCKMUTEX;"); |
| 483 | assert(fieldID != 0); |
| 484 | jUnlockMutex = (*env)->GetObjectField(env, jInitArgsObject, fieldID); |
| 485 | assert(jUnlockMutex != 0); |
| 486 | |
| 487 | /* call the CK_UNLOCKMUTEX method of the UnLockMutex object */ |
| 488 | methodID = (*env)->GetMethodID(env, jUnlockMutexClass, "CK_UNLOCKMUTEX", "(Ljava/lang/Object;)V"); |
| 489 | assert(methodID != 0); |
| 490 | (*env)->CallVoidMethod(env, jUnlockMutex, methodID, jMutex); |
| 491 | |
| 492 | |
| 493 | /* check, if callback threw an exception */ |
| 494 | pkcs11Exception = (*env)->ExceptionOccurred(env); |
| 495 | |
| 496 | if (pkcs11Exception != NULL) { |
| 497 | /* The was an exception thrown, now we get the error-code from it */ |
| 498 | pkcs11ExceptionClass = (*env)->FindClass(env, CLASS_PKCS11EXCEPTION); |
| 499 | methodID = (*env)->GetMethodID(env, pkcs11ExceptionClass, "getErrorCode", "()J"); |
| 500 | assert(methodID != 0); |
| 501 | errorCode = (*env)->CallLongMethod(env, pkcs11Exception, methodID); |
| 502 | rv = jLongToCKULong(errorCode); |
| 503 | } |
| 504 | |
| 505 | /* if we attached this thread to the VM just for callback, we detach it now */ |
| 506 | if (wasAttached) { |
| 507 | returnValue = (*jvm)->DetachCurrentThread(jvm); |
| 508 | } |
| 509 | |
| 510 | return rv ; |
| 511 | } |
| 512 | |
| 513 | #endif /* NO_CALLBACKS */ |