ibeprikey.c

IBE是一种非对称密码技术

        newPrivatePoint.yCoord.data, newPrivatePoint.yCoord.len);
      localData->bfKeyInfo.privatePoint.yCoord.len =
        newPrivatePoint.yCoord.len;
    }
    else
    {
      localData->bbKeyInfo.privatePointD0.isInfinity =
        bbInfo->privatePointD0.isInfinity;
      Z2Memcpy (
        localData->bbKeyInfo.privatePointD0.xCoord.data,
        newPrivatePointD0.xCoord.data, newPrivatePointD0.xCoord.len);
      localData->bbKeyInfo.privatePointD0.xCoord.len =
        newPrivatePointD0.xCoord.len;
      Z2Memcpy (
        localData->bbKeyInfo.privatePointD0.yCoord.data,
        newPrivatePointD0.yCoord.data, newPrivatePointD0.yCoord.len);
      localData->bbKeyInfo.privatePointD0.yCoord.len =
        newPrivatePointD0.yCoord.len;

      localData->bbKeyInfo.privatePointD1.isInfinity =
        bbInfo->privatePointD1.isInfinity;
      Z2Memcpy (
        localData->bbKeyInfo.privatePointD1.xCoord.data,
        newPrivatePointD1.xCoord.data, newPrivatePointD1.xCoord.len);
      localData->bbKeyInfo.privatePointD1.xCoord.len =
        newPrivatePointD1.xCoord.len;
      Z2Memcpy (
        localData->bbKeyInfo.privatePointD1.yCoord.data,
        newPrivatePointD1.yCoord.data, newPrivatePointD1.yCoord.len);
      localData->bbKeyInfo.privatePointD1.yCoord.len =
        newPrivatePointD1.yCoord.len;
    }

    obj->keyType =
      algorithm | VOLT_KEY_TYPE_PRIVATE |
      VOLT_KEY_TYPE_ENCRYPT | VOLT_KEY_TYPE_DATA;
    obj->keyData = (Pointer)localData;
    obj->KeyDataDestroy = IBEPriKeyDataDestroy;

    status = 0;

  } while (0);

  if (newPrivatePoint.xCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePoint.xCoord.data);
  if (newPrivatePoint.yCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePoint.yCoord.data);
  if (newPrivatePointD0.xCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePointD0.xCoord.data);
  if (newPrivatePointD0.yCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePointD0.yCoord.data);
  if (newPrivatePointD1.xCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePointD1.xCoord.data);
  if (newPrivatePointD1.yCoord.data != (unsigned char *)0)
    Z2Free (newPrivatePointD1.yCoord.data);

  /* If everything worked, return 0.
   */
  if (status == 0)
    return (0);

  /* If something went wrong, destroy anything we created.
   */
  VtDestroyParameterObject (&paramClone);
  if (buffer != (unsigned char *)0)
    Z2Free (buffer);

  VOLT_LOG_ERROR (
    libCtx, status, errorType, fnctLine, "VtKeyParamIBEPrivate", (char *)0)

  return (status);
}

static int VoltKeyGetIBEPrivate (
   VtKeyObject object,
   Pointer *getInfo,
   unsigned int algorithm
   )
{
  int status;
  VoltKeyObject *obj = (VoltKeyObject *)object;
  VoltLibCtx *libCtx = (VoltLibCtx *)(obj->voltObject.libraryCtx);
  VoltIBEPriKeyData *priKeyData;
  VOLT_DECLARE_ERROR_TYPE (errorType)
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  do
  {
    /* Is there data?
     */
    VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_GET_INFO_UNAVAILABLE;
    if (obj->keyData == (Pointer)0)
      break;

    /* Make sure the key data is appropriate.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    if ((obj->keyType & VOLT_KEY_TYPE_MASK_ASYM_ALG) != algorithm)
      break;
    if ((obj->keyType & VOLT_KEY_TYPE_PRIVATE) == 0)
      break;

    /* Is the key data the actual data? If so, we're done.
     */
    status = 0;
    if ((obj->keyType & VOLT_KEY_TYPE_MASK_DATA) == VOLT_KEY_TYPE_DATA)
    {
      priKeyData = (VoltIBEPriKeyData *)(obj->keyData);
      *getInfo = (Pointer)&(priKeyData->bbKeyInfo);
      if (algorithm == VOLT_KEY_ALG_IBE_TYPE_1)
        *getInfo = (Pointer)&(priKeyData->bfKeyInfo);
      break;
    }

    /* The data is not available, does the object have a GetData
     * function?
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_GET_INFO_UNAVAILABLE;
    *getInfo = (Pointer)0;
    if (obj->GetKeyData == (VGetKeyData)0)
      break;

    /* Call the Get function.
     */
    VOLT_SET_ERROR_TYPE (errorType, 0)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = obj->GetKeyData ((VtKeyObject)obj, getInfo);

  } while (0);

  VOLT_LOG_ERROR_COMPARE (
    status, libCtx, status, errorType, fnctLine,
    "VoltKeyGetIBEPrivate", (char *)0)

  return (status);
}

int VoltBFCopyPoint (
   VoltLibCtx *libCtx,
   VoltMpIntCtx *mpCtx,
   VtBFType1IBEParamInfo *paramInfo,
   VtBFType1IBEPoint *oldPoint,
   VtBFType1IBEPoint *newPoint
   )
{
  int status;
  unsigned int primeLen, theXLen;
  unsigned char *theX;
  VOLT_DECLARE_ERROR_TYPE (errorType)
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  do
  {
    primeLen = paramInfo->curve.primeP.len;

    /* Because the x-coordinate might contain an extra byte, copy the
     * pointer to a variable we can adjust.
     */
    theX = oldPoint->xCoord.data;
    theXLen = oldPoint->xCoord.len;

    /* This function rejects infinity.
     */
    VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_INVALID_ASSOCIATED_INFO;
    if (oldPoint->isInfinity != 0)
      break;

    /* Allocate space to hold the computed or copied x and y.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_MEMORY;
    newPoint->yCoord.data = (unsigned char *)Z2Malloc (
      primeLen, VOLT_MEMORY_SENSITIVE);
    if (newPoint->yCoord.data == (unsigned char *)0)
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    newPoint->xCoord.data = (unsigned char *)Z2Malloc (
      primeLen, VOLT_MEMORY_SENSITIVE);
    if (newPoint->xCoord.data == (unsigned char *)0)
      break;

    /* If there is no y-coordinate, compute it.
     */
    if (oldPoint->yCoord.data == (unsigned char *)0)
    {
      /* We can't compute y without the x. And it must be in the
       * appropriate format.
       */
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_INVALID_ASSOCIATED_INFO;
      if (theX == (unsigned char *)0)
        break;
      VOLT_SET_FNCT_LINE (fnctLine)
      if (theXLen > (primeLen + 1))
        break;

      VOLT_SET_ERROR_TYPE (errorType, 0)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VoltGetYCoordFromX (
        libCtx, mpCtx, (bf_context_t *)0, paramInfo, theX, theXLen,
        newPoint->yCoord.data, primeLen, &(newPoint->yCoord.len));
      if (status != 0)
        break;

      /* At this point, we know that the x-coordinate is one byte too
       * long, we need to copy everything after the first byte.
       */
      theX++;
      theXLen--;
    }
    else
    {
      /* The y-coordinate is given, just copy it.
       */
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_INVALID_ASSOCIATED_INFO;
      if (oldPoint->yCoord.len > primeLen)
        break;

      Z2Memcpy (
        newPoint->yCoord.data, oldPoint->yCoord.data, oldPoint->yCoord.len);
      newPoint->yCoord.len = oldPoint->yCoord.len;
    }

    /* If there is no x-coordinate, compute it.
     */
    if (theX == (unsigned char *)0)
    {
      /* If we got this far, then the y-coordinate was not NULL. If it
       * had been NULL, and the x-coordinate was NULL, then there would
       * have been an error.
       */
      VOLT_SET_ERROR_TYPE (errorType, 0)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VoltGetXCoordFromY (
        libCtx, mpCtx, paramInfo, oldPoint->yCoord.data, oldPoint->yCoord.len,
        newPoint->xCoord.data, primeLen, &(newPoint->xCoord.len));
      if (status != 0)
        break;
    }
    else
    {
      /* The x-coordinate is given, just copy it.
       */
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_INVALID_ASSOCIATED_INFO;
      if (theXLen > primeLen)
        break;

      Z2Memcpy (newPoint->xCoord.data, theX, theXLen);
      newPoint->xCoord.len = theXLen;
    }

    status = 0;

  } while (0);

  VOLT_LOG_ERROR_INFO_COMPARE (
    status, libCtx, 0, status, 0, errorType,
    (char *)0, "VoltBFCopyPoint", fnctLine, (char *)0)

  return (status);
}

void IBEPriKeyDataDestroy (
   Pointer obj,
   Pointer ctx
   )
{
  VoltObject *voltObj = (VoltObject *)obj;
  VoltLibCtx *libCtx;
  VoltIBEPriKeyData *localData = (VoltIBEPriKeyData *)ctx;

  if ( (obj == (Pointer)0) || (ctx == (Pointer)0) )
    return;

  libCtx = (VoltLibCtx *)(voltObj->libraryCtx);

  VtDestroyParameterObject (&(localData->bfKeyInfo.ibeParams));

  Z2Free (localData);
}