/* * 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; }
/* * 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; }
/* * 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; }
/* 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; }
/* * 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; } }
/* * 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; }
/* * 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; }
/* * 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; }
/* * 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 (!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; }
/* * execute a bulk encryption operation */ SECStatus PK11_CipherOp(PK11Context *context, unsigned char * out, int *outlen, int maxout, 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 * loose 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, 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, in, inlen, out, &length); length += offset; break; case CKA_DECRYPT: length = maxout; crv=PK11_GETTAB(context->slot)->C_DecryptUpdate(context->session, 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; }
/* * 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)) { 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 { 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; }