| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| /* |
| * This file PK11Contexts which are used in multipart hashing, |
| * encryption/decryption, and signing/verication operations. |
| */ |
| |
| #include "seccomon.h" |
| #include "secmod.h" |
| #include "nssilock.h" |
| #include "secmodi.h" |
| #include "secmodti.h" |
| #include "pkcs11.h" |
| #include "pk11func.h" |
| #include "secitem.h" |
| #include "secoid.h" |
| #include "sechash.h" |
| #include "secerr.h" |
| |
| static const SECItem pk11_null_params = { 0 }; |
| |
| /********************************************************************** |
| * |
| * Now Deal with Crypto Contexts |
| * |
| **********************************************************************/ |
| |
| /* |
| * the monitors... |
| */ |
| void |
| PK11_EnterContextMonitor(PK11Context *cx) |
| { |
| /* if we own the session and our slot is ThreadSafe, only monitor |
| * the Context */ |
| if ((cx->ownSession) && (cx->slot->isThreadSafe)) { |
| /* Should this use monitors instead? */ |
| PZ_Lock(cx->sessionLock); |
| } else { |
| PK11_EnterSlotMonitor(cx->slot); |
| } |
| } |
| |
| void |
| PK11_ExitContextMonitor(PK11Context *cx) |
| { |
| /* if we own the session and our slot is ThreadSafe, only monitor |
| * the Context */ |
| if ((cx->ownSession) && (cx->slot->isThreadSafe)) { |
| /* Should this use monitors instead? */ |
| PZ_Unlock(cx->sessionLock); |
| } else { |
| PK11_ExitSlotMonitor(cx->slot); |
| } |
| } |
| |
| /* |
| * Free up a Cipher Context |
| */ |
| void |
| PK11_DestroyContext(PK11Context *context, PRBool freeit) |
| { |
| pk11_CloseSession(context->slot, context->session, context->ownSession); |
| /* initialize the critical fields of the context */ |
| if (context->savedData != NULL) |
| PORT_Free(context->savedData); |
| if (context->key) |
| PK11_FreeSymKey(context->key); |
| if (context->param && context->param != &pk11_null_params) |
| SECITEM_FreeItem(context->param, PR_TRUE); |
| if (context->sessionLock) |
| PZ_DestroyLock(context->sessionLock); |
| PK11_FreeSlot(context->slot); |
| if (freeit) |
| PORT_Free(context); |
| } |
| |
| /* |
| * save the current context. Allocate Space if necessary. |
| */ |
| static unsigned char * |
| pk11_saveContextHelper(PK11Context *context, unsigned char *buffer, |
| unsigned long *savedLength) |
| { |
| CK_RV crv; |
| |
| /* If buffer is NULL, this will get the length */ |
| crv = PK11_GETTAB(context->slot)->C_GetOperationState(context->session, (CK_BYTE_PTR)buffer, savedLength); |
| if (!buffer || (crv == CKR_BUFFER_TOO_SMALL)) { |
| /* the given buffer wasn't big enough (or was NULL), but we |
| * have the length, so try again with a new buffer and the |
| * correct length |
| */ |
| unsigned long bufLen = *savedLength; |
| buffer = PORT_Alloc(bufLen); |
| if (buffer == NULL) { |
| return (unsigned char *)NULL; |
| } |
| crv = PK11_GETTAB(context->slot)->C_GetOperationState(context->session, (CK_BYTE_PTR)buffer, savedLength); |
| if (crv != CKR_OK) { |
| PORT_ZFree(buffer, bufLen); |
| } |
| } |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| return (unsigned char *)NULL; |
| } |
| return buffer; |
| } |
| |
| void * |
| pk11_saveContext(PK11Context *context, void *space, unsigned long *savedLength) |
| { |
| return pk11_saveContextHelper(context, |
| (unsigned char *)space, savedLength); |
| } |
| |
| /* |
| * restore the current context |
| */ |
| SECStatus |
| pk11_restoreContext(PK11Context *context, void *space, unsigned long savedLength) |
| { |
| CK_RV crv; |
| CK_OBJECT_HANDLE objectID = (context->key) ? context->key->objectID : CK_INVALID_HANDLE; |
| |
| PORT_Assert(space != NULL); |
| if (space == NULL) { |
| PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); |
| return SECFailure; |
| } |
| crv = PK11_GETTAB(context->slot)->C_SetOperationState(context->session, (CK_BYTE_PTR)space, savedLength, objectID, 0); |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| return SECFailure; |
| } |
| return SECSuccess; |
| } |
| |
| SECStatus pk11_Finalize(PK11Context *context); |
| |
| /* |
| * Context initialization. Used by all flavors of CreateContext |
| */ |
| static SECStatus |
| pk11_context_init(PK11Context *context, CK_MECHANISM *mech_info) |
| { |
| CK_RV crv; |
| PK11SymKey *symKey = context->key; |
| SECStatus rv = SECSuccess; |
| |
| switch (context->operation) { |
| case CKA_ENCRYPT: |
| crv = PK11_GETTAB(context->slot)->C_EncryptInit(context->session, mech_info, symKey->objectID); |
| break; |
| case CKA_DECRYPT: |
| if (context->fortezzaHack) { |
| CK_ULONG count = 0; |
| /* generate the IV for fortezza */ |
| crv = PK11_GETTAB(context->slot)->C_EncryptInit(context->session, mech_info, symKey->objectID); |
| if (crv != CKR_OK) |
| break; |
| PK11_GETTAB(context->slot) |
| ->C_EncryptFinal(context->session, |
| NULL, &count); |
| } |
| crv = PK11_GETTAB(context->slot)->C_DecryptInit(context->session, mech_info, symKey->objectID); |
| break; |
| case CKA_SIGN: |
| crv = PK11_GETTAB(context->slot)->C_SignInit(context->session, mech_info, symKey->objectID); |
| break; |
| case CKA_VERIFY: |
| crv = PK11_GETTAB(context->slot)->C_SignInit(context->session, mech_info, symKey->objectID); |
| break; |
| case CKA_DIGEST: |
| crv = PK11_GETTAB(context->slot)->C_DigestInit(context->session, mech_info); |
| break; |
| default: |
| crv = CKR_OPERATION_NOT_INITIALIZED; |
| break; |
| } |
| |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| return SECFailure; |
| } |
| |
| /* |
| * handle session starvation case.. use our last session to multiplex |
| */ |
| if (!context->ownSession) { |
| context->savedData = pk11_saveContext(context, context->savedData, |
| &context->savedLength); |
| if (context->savedData == NULL) |
| rv = SECFailure; |
| /* clear out out session for others to use */ |
| pk11_Finalize(context); |
| } |
| return rv; |
| } |
| |
| /* |
| * Common Helper Function do come up with a new context. |
| */ |
| static PK11Context * |
| pk11_CreateNewContextInSlot(CK_MECHANISM_TYPE type, |
| PK11SlotInfo *slot, CK_ATTRIBUTE_TYPE operation, PK11SymKey *symKey, |
| SECItem *param) |
| { |
| CK_MECHANISM mech_info; |
| PK11Context *context; |
| SECStatus rv; |
| |
| PORT_Assert(slot != NULL); |
| if (!slot || (!symKey && ((operation != CKA_DIGEST) || |
| (type == CKM_SKIPJACK_CBC64)))) { |
| PORT_SetError(SEC_ERROR_INVALID_ARGS); |
| return NULL; |
| } |
| context = (PK11Context *)PORT_Alloc(sizeof(PK11Context)); |
| if (context == NULL) { |
| return NULL; |
| } |
| |
| /* now deal with the fortezza hack... the fortezza hack is an attempt |
| * to get around the issue of the card not allowing you to do a FORTEZZA |
| * LoadIV/Encrypt, which was added because such a combination could be |
| * use to circumvent the key escrow system. Unfortunately SSL needs to |
| * do this kind of operation, so in SSL we do a loadIV (to verify it), |
| * Then GenerateIV, and through away the first 8 bytes on either side |
| * of the connection.*/ |
| context->fortezzaHack = PR_FALSE; |
| if (type == CKM_SKIPJACK_CBC64) { |
| if (symKey->origin == PK11_OriginFortezzaHack) { |
| context->fortezzaHack = PR_TRUE; |
| } |
| } |
| |
| /* initialize the critical fields of the context */ |
| context->operation = operation; |
| context->key = symKey ? PK11_ReferenceSymKey(symKey) : NULL; |
| context->slot = PK11_ReferenceSlot(slot); |
| context->session = pk11_GetNewSession(slot, &context->ownSession); |
| context->cx = symKey ? symKey->cx : NULL; |
| /* get our session */ |
| context->savedData = NULL; |
| |
| /* save the parameters so that some digesting stuff can do multiple |
| * begins on a single context */ |
| context->type = type; |
| if (param) { |
| if (param->len > 0) { |
| context->param = SECITEM_DupItem(param); |
| } else { |
| context->param = (SECItem *)&pk11_null_params; |
| } |
| } else { |
| PORT_SetError(SEC_ERROR_INVALID_ARGS); |
| context->param = NULL; |
| } |
| context->init = PR_FALSE; |
| context->sessionLock = PZ_NewLock(nssILockPK11cxt); |
| if ((context->param == NULL) || (context->sessionLock == NULL)) { |
| PK11_DestroyContext(context, PR_TRUE); |
| return NULL; |
| } |
| |
| mech_info.mechanism = type; |
| mech_info.pParameter = param->data; |
| mech_info.ulParameterLen = param->len; |
| PK11_EnterContextMonitor(context); |
| rv = pk11_context_init(context, &mech_info); |
| PK11_ExitContextMonitor(context); |
| |
| if (rv != SECSuccess) { |
| PK11_DestroyContext(context, PR_TRUE); |
| return NULL; |
| } |
| context->init = PR_TRUE; |
| return context; |
| } |
| |
| /* |
| * put together the various PK11_Create_Context calls used by different |
| * parts of libsec. |
| */ |
| PK11Context * |
| __PK11_CreateContextByRawKey(PK11SlotInfo *slot, CK_MECHANISM_TYPE type, |
| PK11Origin origin, CK_ATTRIBUTE_TYPE operation, SECItem *key, |
| SECItem *param, void *wincx) |
| { |
| PK11SymKey *symKey = NULL; |
| PK11Context *context = NULL; |
| |
| /* first get a slot */ |
| if (slot == NULL) { |
| slot = PK11_GetBestSlot(type, wincx); |
| if (slot == NULL) { |
| PORT_SetError(SEC_ERROR_NO_MODULE); |
| goto loser; |
| } |
| } else { |
| PK11_ReferenceSlot(slot); |
| } |
| |
| /* now import the key */ |
| symKey = PK11_ImportSymKey(slot, type, origin, operation, key, wincx); |
| if (symKey == NULL) |
| goto loser; |
| |
| context = PK11_CreateContextBySymKey(type, operation, symKey, param); |
| |
| loser: |
| if (symKey) { |
| PK11_FreeSymKey(symKey); |
| } |
| if (slot) { |
| PK11_FreeSlot(slot); |
| } |
| |
| return context; |
| } |
| |
| PK11Context * |
| PK11_CreateContextByRawKey(PK11SlotInfo *slot, CK_MECHANISM_TYPE type, |
| PK11Origin origin, CK_ATTRIBUTE_TYPE operation, SECItem *key, |
| SECItem *param, void *wincx) |
| { |
| return __PK11_CreateContextByRawKey(slot, type, origin, operation, |
| key, param, wincx); |
| } |
| |
| /* |
| * Create a context from a key. We really should make sure we aren't using |
| * the same key in multiple session! |
| */ |
| PK11Context * |
| PK11_CreateContextBySymKey(CK_MECHANISM_TYPE type, CK_ATTRIBUTE_TYPE operation, |
| PK11SymKey *symKey, SECItem *param) |
| { |
| PK11SymKey *newKey; |
| PK11Context *context; |
| |
| /* if this slot doesn't support the mechanism, go to a slot that does */ |
| newKey = pk11_ForceSlot(symKey, type, operation); |
| if (newKey == NULL) { |
| PK11_ReferenceSymKey(symKey); |
| } else { |
| symKey = newKey; |
| } |
| |
| /* Context Adopts the symKey.... */ |
| context = pk11_CreateNewContextInSlot(type, symKey->slot, operation, symKey, |
| param); |
| PK11_FreeSymKey(symKey); |
| return context; |
| } |
| |
| /* |
| * Digest contexts don't need keys, but the do need to find a slot. |
| * Macing should use PK11_CreateContextBySymKey. |
| */ |
| PK11Context * |
| PK11_CreateDigestContext(SECOidTag hashAlg) |
| { |
| /* digesting has to work without authentication to the slot */ |
| CK_MECHANISM_TYPE type; |
| PK11SlotInfo *slot; |
| PK11Context *context; |
| SECItem param; |
| |
| type = PK11_AlgtagToMechanism(hashAlg); |
| slot = PK11_GetBestSlot(type, NULL); |
| if (slot == NULL) { |
| PORT_SetError(SEC_ERROR_NO_MODULE); |
| return NULL; |
| } |
| |
| /* maybe should really be PK11_GenerateNewParam?? */ |
| param.data = NULL; |
| param.len = 0; |
| param.type = 0; |
| |
| context = pk11_CreateNewContextInSlot(type, slot, CKA_DIGEST, NULL, ¶m); |
| PK11_FreeSlot(slot); |
| return context; |
| } |
| |
| /* |
| * create a new context which is the clone of the state of old context. |
| */ |
| PK11Context * |
| PK11_CloneContext(PK11Context *old) |
| { |
| PK11Context *newcx; |
| PRBool needFree = PR_FALSE; |
| SECStatus rv = SECSuccess; |
| void *data; |
| unsigned long len; |
| |
| newcx = pk11_CreateNewContextInSlot(old->type, old->slot, old->operation, |
| old->key, old->param); |
| if (newcx == NULL) |
| return NULL; |
| |
| /* now clone the save state. First we need to find the save state |
| * of the old session. If the old context owns it's session, |
| * the state needs to be saved, otherwise the state is in saveData. */ |
| if (old->ownSession) { |
| PK11_EnterContextMonitor(old); |
| data = pk11_saveContext(old, NULL, &len); |
| PK11_ExitContextMonitor(old); |
| needFree = PR_TRUE; |
| } else { |
| data = old->savedData; |
| len = old->savedLength; |
| } |
| |
| if (data == NULL) { |
| PK11_DestroyContext(newcx, PR_TRUE); |
| return NULL; |
| } |
| |
| /* now copy that state into our new context. Again we have different |
| * work if the new context owns it's own session. If it does, we |
| * restore the state gathered above. If it doesn't, we copy the |
| * saveData pointer... */ |
| if (newcx->ownSession) { |
| PK11_EnterContextMonitor(newcx); |
| rv = pk11_restoreContext(newcx, data, len); |
| PK11_ExitContextMonitor(newcx); |
| } else { |
| PORT_Assert(newcx->savedData != NULL); |
| if ((newcx->savedData == NULL) || (newcx->savedLength < len)) { |
| PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); |
| rv = SECFailure; |
| } else { |
| PORT_Memcpy(newcx->savedData, data, len); |
| newcx->savedLength = len; |
| } |
| } |
| |
| if (needFree) |
| PORT_Free(data); |
| |
| if (rv != SECSuccess) { |
| PK11_DestroyContext(newcx, PR_TRUE); |
| return NULL; |
| } |
| return newcx; |
| } |
| |
| /* |
| * save the current context state into a variable. Required to make FORTEZZA |
| * work. |
| */ |
| SECStatus |
| PK11_SaveContext(PK11Context *cx, unsigned char *save, int *len, int saveLength) |
| { |
| unsigned char *data = NULL; |
| CK_ULONG length = saveLength; |
| |
| if (cx->ownSession) { |
| PK11_EnterContextMonitor(cx); |
| data = pk11_saveContextHelper(cx, save, &length); |
| PK11_ExitContextMonitor(cx); |
| if (data) |
| *len = length; |
| } else if ((unsigned)saveLength >= cx->savedLength) { |
| data = (unsigned char *)cx->savedData; |
| if (cx->savedData) { |
| PORT_Memcpy(save, cx->savedData, cx->savedLength); |
| } |
| *len = cx->savedLength; |
| } |
| if (data != NULL) { |
| if (cx->ownSession) { |
| PORT_ZFree(data, length); |
| } |
| return SECSuccess; |
| } else { |
| return SECFailure; |
| } |
| } |
| |
| /* same as above, but may allocate the return buffer. */ |
| unsigned char * |
| PK11_SaveContextAlloc(PK11Context *cx, |
| unsigned char *preAllocBuf, unsigned int pabLen, |
| unsigned int *stateLen) |
| { |
| unsigned char *stateBuf = NULL; |
| unsigned long length = (unsigned long)pabLen; |
| |
| if (cx->ownSession) { |
| PK11_EnterContextMonitor(cx); |
| stateBuf = pk11_saveContextHelper(cx, preAllocBuf, &length); |
| PK11_ExitContextMonitor(cx); |
| *stateLen = (stateBuf != NULL) ? length : 0; |
| } else { |
| if (pabLen < cx->savedLength) { |
| stateBuf = (unsigned char *)PORT_Alloc(cx->savedLength); |
| if (!stateBuf) { |
| return (unsigned char *)NULL; |
| } |
| } else { |
| stateBuf = preAllocBuf; |
| } |
| if (cx->savedData) { |
| PORT_Memcpy(stateBuf, cx->savedData, cx->savedLength); |
| } |
| *stateLen = cx->savedLength; |
| } |
| return stateBuf; |
| } |
| |
| /* |
| * restore the context state into a new running context. Also required for |
| * FORTEZZA . |
| */ |
| SECStatus |
| PK11_RestoreContext(PK11Context *cx, unsigned char *save, int len) |
| { |
| SECStatus rv = SECSuccess; |
| if (cx->ownSession) { |
| PK11_EnterContextMonitor(cx); |
| pk11_Finalize(cx); |
| rv = pk11_restoreContext(cx, save, len); |
| PK11_ExitContextMonitor(cx); |
| } else { |
| PORT_Assert(cx->savedData != NULL); |
| if ((cx->savedData == NULL) || (cx->savedLength < (unsigned)len)) { |
| PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); |
| rv = SECFailure; |
| } else { |
| PORT_Memcpy(cx->savedData, save, len); |
| cx->savedLength = len; |
| } |
| } |
| return rv; |
| } |
| |
| /* |
| * This is to get FIPS compliance until we can convert |
| * libjar to use PK11_ hashing functions. It returns PR_FALSE |
| * if we can't get a PK11 Context. |
| */ |
| PRBool |
| PK11_HashOK(SECOidTag algID) |
| { |
| PK11Context *cx; |
| |
| cx = PK11_CreateDigestContext(algID); |
| if (cx == NULL) |
| return PR_FALSE; |
| PK11_DestroyContext(cx, PR_TRUE); |
| return PR_TRUE; |
| } |
| |
| /* |
| * start a new digesting or Mac'ing operation on this context |
| */ |
| SECStatus |
| PK11_DigestBegin(PK11Context *cx) |
| { |
| CK_MECHANISM mech_info; |
| SECStatus rv; |
| |
| if (cx->init == PR_TRUE) { |
| return SECSuccess; |
| } |
| |
| /* |
| * make sure the old context is clear first |
| */ |
| PK11_EnterContextMonitor(cx); |
| pk11_Finalize(cx); |
| |
| mech_info.mechanism = cx->type; |
| mech_info.pParameter = cx->param->data; |
| mech_info.ulParameterLen = cx->param->len; |
| rv = pk11_context_init(cx, &mech_info); |
| PK11_ExitContextMonitor(cx); |
| |
| if (rv != SECSuccess) { |
| return SECFailure; |
| } |
| cx->init = PR_TRUE; |
| return SECSuccess; |
| } |
| |
| SECStatus |
| PK11_HashBuf(SECOidTag hashAlg, unsigned char *out, const unsigned char *in, |
| PRInt32 len) |
| { |
| PK11Context *context; |
| unsigned int max_length; |
| unsigned int out_length; |
| SECStatus rv; |
| |
| /* len will be passed to PK11_DigestOp as unsigned. */ |
| if (len < 0) { |
| PORT_SetError(SEC_ERROR_INVALID_ARGS); |
| return SECFailure; |
| } |
| |
| context = PK11_CreateDigestContext(hashAlg); |
| if (context == NULL) |
| return SECFailure; |
| |
| rv = PK11_DigestBegin(context); |
| if (rv != SECSuccess) { |
| PK11_DestroyContext(context, PR_TRUE); |
| return rv; |
| } |
| |
| rv = PK11_DigestOp(context, in, len); |
| if (rv != SECSuccess) { |
| PK11_DestroyContext(context, PR_TRUE); |
| return rv; |
| } |
| |
| /* XXX This really should have been an argument to this function! */ |
| max_length = HASH_ResultLenByOidTag(hashAlg); |
| PORT_Assert(max_length); |
| if (!max_length) |
| max_length = HASH_LENGTH_MAX; |
| |
| rv = PK11_DigestFinal(context, out, &out_length, max_length); |
| PK11_DestroyContext(context, PR_TRUE); |
| return rv; |
| } |
| |
| /* |
| * execute a bulk encryption operation |
| */ |
| SECStatus |
| PK11_CipherOp(PK11Context *context, unsigned char *out, int *outlen, |
| int maxout, const unsigned char *in, int inlen) |
| { |
| CK_RV crv = CKR_OK; |
| CK_ULONG length = maxout; |
| CK_ULONG offset = 0; |
| SECStatus rv = SECSuccess; |
| unsigned char *saveOut = out; |
| unsigned char *allocOut = NULL; |
| |
| /* if we ran out of session, we need to restore our previously stored |
| * state. |
| */ |
| PK11_EnterContextMonitor(context); |
| if (!context->ownSession) { |
| rv = pk11_restoreContext(context, context->savedData, |
| context->savedLength); |
| if (rv != SECSuccess) { |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| } |
| |
| /* |
| * The fortezza hack is to send 8 extra bytes on the first encrypted and |
| * lose them on the first decrypt. |
| */ |
| if (context->fortezzaHack) { |
| unsigned char random[8]; |
| if (context->operation == CKA_ENCRYPT) { |
| PK11_ExitContextMonitor(context); |
| rv = PK11_GenerateRandom(random, sizeof(random)); |
| PK11_EnterContextMonitor(context); |
| |
| /* since we are offseting the output, we can't encrypt back into |
| * the same buffer... allocate a temporary buffer just for this |
| * call. */ |
| allocOut = out = (unsigned char *)PORT_Alloc(maxout); |
| if (out == NULL) { |
| PK11_ExitContextMonitor(context); |
| return SECFailure; |
| } |
| crv = PK11_GETTAB(context->slot)->C_EncryptUpdate(context->session, random, sizeof(random), out, &length); |
| |
| out += length; |
| maxout -= length; |
| offset = length; |
| } else if (context->operation == CKA_DECRYPT) { |
| length = sizeof(random); |
| crv = PK11_GETTAB(context->slot)->C_DecryptUpdate(context->session, (CK_BYTE_PTR)in, sizeof(random), random, &length); |
| inlen -= length; |
| in += length; |
| context->fortezzaHack = PR_FALSE; |
| } |
| } |
| |
| switch (context->operation) { |
| case CKA_ENCRYPT: |
| length = maxout; |
| crv = PK11_GETTAB(context->slot)->C_EncryptUpdate(context->session, (CK_BYTE_PTR)in, inlen, out, &length); |
| length += offset; |
| break; |
| case CKA_DECRYPT: |
| length = maxout; |
| crv = PK11_GETTAB(context->slot)->C_DecryptUpdate(context->session, (CK_BYTE_PTR)in, inlen, out, &length); |
| break; |
| default: |
| crv = CKR_OPERATION_NOT_INITIALIZED; |
| break; |
| } |
| |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| *outlen = 0; |
| rv = SECFailure; |
| } else { |
| *outlen = length; |
| } |
| |
| if (context->fortezzaHack) { |
| if (context->operation == CKA_ENCRYPT) { |
| PORT_Assert(allocOut); |
| PORT_Memcpy(saveOut, allocOut, length); |
| PORT_Free(allocOut); |
| } |
| context->fortezzaHack = PR_FALSE; |
| } |
| |
| /* |
| * handle session starvation case.. use our last session to multiplex |
| */ |
| if (!context->ownSession) { |
| context->savedData = pk11_saveContext(context, context->savedData, |
| &context->savedLength); |
| if (context->savedData == NULL) |
| rv = SECFailure; |
| |
| /* clear out out session for others to use */ |
| pk11_Finalize(context); |
| } |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| |
| /* |
| * execute a digest/signature operation |
| */ |
| SECStatus |
| PK11_DigestOp(PK11Context *context, const unsigned char *in, unsigned inLen) |
| { |
| CK_RV crv = CKR_OK; |
| SECStatus rv = SECSuccess; |
| |
| if (inLen == 0) { |
| return SECSuccess; |
| } |
| if (!in) { |
| PORT_SetError(SEC_ERROR_INVALID_ARGS); |
| return SECFailure; |
| } |
| |
| /* if we ran out of session, we need to restore our previously stored |
| * state. |
| */ |
| context->init = PR_FALSE; |
| PK11_EnterContextMonitor(context); |
| if (!context->ownSession) { |
| rv = pk11_restoreContext(context, context->savedData, |
| context->savedLength); |
| if (rv != SECSuccess) { |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| } |
| |
| switch (context->operation) { |
| /* also for MAC'ing */ |
| case CKA_SIGN: |
| crv = PK11_GETTAB(context->slot)->C_SignUpdate(context->session, (unsigned char *)in, inLen); |
| break; |
| case CKA_VERIFY: |
| crv = PK11_GETTAB(context->slot)->C_VerifyUpdate(context->session, (unsigned char *)in, inLen); |
| break; |
| case CKA_DIGEST: |
| crv = PK11_GETTAB(context->slot)->C_DigestUpdate(context->session, (unsigned char *)in, inLen); |
| break; |
| default: |
| crv = CKR_OPERATION_NOT_INITIALIZED; |
| break; |
| } |
| |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| rv = SECFailure; |
| } |
| |
| /* |
| * handle session starvation case.. use our last session to multiplex |
| */ |
| if (!context->ownSession) { |
| context->savedData = pk11_saveContext(context, context->savedData, |
| &context->savedLength); |
| if (context->savedData == NULL) |
| rv = SECFailure; |
| |
| /* clear out out session for others to use */ |
| pk11_Finalize(context); |
| } |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| |
| /* |
| * Digest a key if possible./ |
| */ |
| SECStatus |
| PK11_DigestKey(PK11Context *context, PK11SymKey *key) |
| { |
| CK_RV crv = CKR_OK; |
| SECStatus rv = SECSuccess; |
| PK11SymKey *newKey = NULL; |
| |
| if (!context || !key) { |
| PORT_SetError(SEC_ERROR_INVALID_ARGS); |
| return SECFailure; |
| } |
| |
| /* if we ran out of session, we need to restore our previously stored |
| * state. |
| */ |
| if (context->slot != key->slot) { |
| newKey = pk11_CopyToSlot(context->slot, CKM_SSL3_SHA1_MAC, CKA_SIGN, key); |
| } else { |
| newKey = PK11_ReferenceSymKey(key); |
| } |
| |
| context->init = PR_FALSE; |
| PK11_EnterContextMonitor(context); |
| if (!context->ownSession) { |
| rv = pk11_restoreContext(context, context->savedData, |
| context->savedLength); |
| if (rv != SECSuccess) { |
| PK11_ExitContextMonitor(context); |
| PK11_FreeSymKey(newKey); |
| return rv; |
| } |
| } |
| |
| if (newKey == NULL) { |
| crv = CKR_KEY_TYPE_INCONSISTENT; |
| if (key->data.data) { |
| crv = PK11_GETTAB(context->slot)->C_DigestUpdate(context->session, key->data.data, key->data.len); |
| } |
| } else { |
| crv = PK11_GETTAB(context->slot)->C_DigestKey(context->session, newKey->objectID); |
| } |
| |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| rv = SECFailure; |
| } |
| |
| /* |
| * handle session starvation case.. use our last session to multiplex |
| */ |
| if (!context->ownSession) { |
| context->savedData = pk11_saveContext(context, context->savedData, |
| &context->savedLength); |
| if (context->savedData == NULL) |
| rv = SECFailure; |
| |
| /* clear out out session for others to use */ |
| pk11_Finalize(context); |
| } |
| PK11_ExitContextMonitor(context); |
| if (newKey) |
| PK11_FreeSymKey(newKey); |
| return rv; |
| } |
| |
| /* |
| * externally callable version of the lowercase pk11_finalize(). |
| */ |
| SECStatus |
| PK11_Finalize(PK11Context *context) |
| { |
| SECStatus rv; |
| |
| PK11_EnterContextMonitor(context); |
| rv = pk11_Finalize(context); |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| |
| /* |
| * clean up a cipher operation, so the session can be used by |
| * someone new. |
| */ |
| SECStatus |
| pk11_Finalize(PK11Context *context) |
| { |
| CK_ULONG count = 0; |
| CK_RV crv; |
| unsigned char stackBuf[256]; |
| unsigned char *buffer = NULL; |
| |
| if (!context->ownSession) { |
| return SECSuccess; |
| } |
| |
| finalize: |
| switch (context->operation) { |
| case CKA_ENCRYPT: |
| crv = PK11_GETTAB(context->slot)->C_EncryptFinal(context->session, buffer, &count); |
| break; |
| case CKA_DECRYPT: |
| crv = PK11_GETTAB(context->slot)->C_DecryptFinal(context->session, buffer, &count); |
| break; |
| case CKA_SIGN: |
| crv = PK11_GETTAB(context->slot)->C_SignFinal(context->session, buffer, &count); |
| break; |
| case CKA_VERIFY: |
| crv = PK11_GETTAB(context->slot)->C_VerifyFinal(context->session, buffer, count); |
| break; |
| case CKA_DIGEST: |
| crv = PK11_GETTAB(context->slot)->C_DigestFinal(context->session, buffer, &count); |
| break; |
| default: |
| crv = CKR_OPERATION_NOT_INITIALIZED; |
| break; |
| } |
| |
| if (crv != CKR_OK) { |
| if (buffer != stackBuf) { |
| PORT_Free(buffer); |
| } |
| if (crv == CKR_OPERATION_NOT_INITIALIZED) { |
| /* if there's no operation, it is finalized */ |
| return SECSuccess; |
| } |
| PORT_SetError(PK11_MapError(crv)); |
| return SECFailure; |
| } |
| |
| /* try to finalize the session with a buffer */ |
| if (buffer == NULL) { |
| if (count <= sizeof stackBuf) { |
| buffer = stackBuf; |
| } else { |
| buffer = PORT_Alloc(count); |
| if (buffer == NULL) { |
| PORT_SetError(SEC_ERROR_NO_MEMORY); |
| return SECFailure; |
| } |
| } |
| goto finalize; |
| } |
| if (buffer != stackBuf) { |
| PORT_Free(buffer); |
| } |
| return SECSuccess; |
| } |
| |
| /* |
| * Return the final digested or signed data... |
| * this routine can either take pre initialized data, or allocate data |
| * either out of an arena or out of the standard heap. |
| */ |
| SECStatus |
| PK11_DigestFinal(PK11Context *context, unsigned char *data, |
| unsigned int *outLen, unsigned int length) |
| { |
| CK_ULONG len; |
| CK_RV crv; |
| SECStatus rv; |
| |
| /* if we ran out of session, we need to restore our previously stored |
| * state. |
| */ |
| PK11_EnterContextMonitor(context); |
| if (!context->ownSession) { |
| rv = pk11_restoreContext(context, context->savedData, |
| context->savedLength); |
| if (rv != SECSuccess) { |
| PK11_ExitContextMonitor(context); |
| return rv; |
| } |
| } |
| |
| len = length; |
| switch (context->operation) { |
| case CKA_SIGN: |
| crv = PK11_GETTAB(context->slot)->C_SignFinal(context->session, data, &len); |
| break; |
| case CKA_VERIFY: |
| crv = PK11_GETTAB(context->slot)->C_VerifyFinal(context->session, data, len); |
| break; |
| case CKA_DIGEST: |
| crv = PK11_GETTAB(context->slot)->C_DigestFinal(context->session, data, &len); |
| break; |
| case CKA_ENCRYPT: |
| crv = PK11_GETTAB(context->slot)->C_EncryptFinal(context->session, data, &len); |
| break; |
| case CKA_DECRYPT: |
| crv = PK11_GETTAB(context->slot)->C_DecryptFinal(context->session, data, &len); |
| break; |
| default: |
| crv = CKR_OPERATION_NOT_INITIALIZED; |
| break; |
| } |
| PK11_ExitContextMonitor(context); |
| |
| *outLen = (unsigned int)len; |
| context->init = PR_FALSE; /* allow Begin to start up again */ |
| |
| if (crv != CKR_OK) { |
| PORT_SetError(PK11_MapError(crv)); |
| return SECFailure; |
| } |
| return SECSuccess; |
| } |
