smwrite.c

IBE是一种非对称密码技术

         index <= VOLT_WRITE_SM_FOOT_INDEX_END; ++index)
    {
      /* Add in the length of the actual data to write out.
       * If there is data to write out, add a newLine.
       */
      elementLen = writeCtx->itemArray[index].len;
      if (elementLen == 0)
        continue;

      Z2Memcpy (
        message + offset, writeCtx->itemArray[index].data, elementLen);
      offset += elementLen;
      Z2Memcpy (message + offset, newLine, newLineLen);
      offset += newLineLen;
    }

    obj->inputLen += inputDataLen;
    obj->state = VOLT_SECURE_MAIL_STATE_WRITE_FINAL;

  } while (0);

  if (sBuffer != (unsigned char *)0)
    Z2Free (sBuffer);
  if (eBuffer != (unsigned char *)0)
    Z2Free (eBuffer);

  VOLT_LOG_ERROR_INFO_COMPARE (
    status, 0, secureMailObj, status, 0, errorType,
    (char *)0, "VoltSecureMailWriteFinal", fnctLine, (char *)0)

  return (status);
}

#define VOLT_CONTENT_TYPE_LABEL        "content-type: "
#define VOLT_CONTENT_TYPE_LABEL_LEN    14
#define VOLT_CONTENT_LENGTH_LABEL      "content-length: "
#define VOLT_CONTENT_LENGTH_LABEL_LEN  16
#define VOLT_FILE_NAME_LABEL           "file-name="
#define VOLT_FILE_NAME_LABEL_LEN       10
#define VOLT_CONTENT_ZDR_UTC           "ZDR-Utc: "
#define VOLT_CONTENT_ZDR_UTC_LEN       9
#define VOLT_CONTENT_ZDR_FROM          "ZDR-From: "
#define VOLT_CONTENT_ZDR_FROM_LEN      10
#define VOLT_CONTENT_ZDR_TO            "ZDR-To: "
#define VOLT_CONTENT_ZDR_TO_LEN        8
#define VOLT_CONTENT_ZDR_SUBJECT       "ZDR-Subject: "
#define VOLT_CONTENT_ZDR_SUBJECT_LEN   13
#define VOLT_CONTENT_COMMA_SPACE       ", "
#define VOLT_CONTENT_COMMA_SPACE_LEN   2

static int SetTotalLengths (
   VoltSecureMailObject *obj,
   VoltSecureMailWriteCtx *writeCtx,
   VtRandomObject random
   )
{
  int status;
  unsigned int asciiNumLen, offset, index, count, maxIndex;
#if VT_64_BIT_LENGTH == 64
  VtUInt64 reportLen, currentLen;
#else
  unsigned int reportLen, currentLen;
#endif
  UInt32 numLo, numHi;
  unsigned int newLineLen =
    writeCtx->itemArray[VOLT_WRITE_SM_ITEM_NEW_LINE].len;
  unsigned int footerLen =
    writeCtx->itemArray[VOLT_WRITE_SM_ITEM_CONTENT_FOOTER].len;
  VoltLibCtx *libCtx = (VoltLibCtx *)(obj->voltObject.libraryCtx);
  VtIdentityObject getId;
  char *contentTypeLabel = VOLT_CONTENT_TYPE_LABEL;
  char *contentType = VOLT_SECURE_FILE_CONTENT;
  char *contentLengthLabel = VOLT_CONTENT_LENGTH_LABEL;
  char *zdrUtcLine = VOLT_CONTENT_ZDR_UTC;
  char *zdrFromLine = VOLT_CONTENT_ZDR_FROM;
  char *zdrToLine = VOLT_CONTENT_ZDR_TO;
  char *zdrSubjectLine = VOLT_CONTENT_ZDR_SUBJECT;
  char *asciiNum = (char *)0;
  unsigned char *newLine =
    writeCtx->itemArray[VOLT_WRITE_SM_ITEM_NEW_LINE].data;
  VtItem *preP7 = &(writeCtx->itemArray[VOLT_WRITE_SM_PRE_PKCS7]);
  VtItem *report = &(writeCtx->itemArray[VOLT_WRITE_SM_ITEM_CONTENT_REPORT]);
  VtItem *getName;
  VtItem tempItem;
  VtTime theTime;
  unsigned char utcTime[VOLT_UTC_LEN];
  char *commaSpace = VOLT_CONTENT_COMMA_SPACE;
  VoltEncodeDecodeSizeInfo encodeDecodeSizeInfo;
  VOLT_DECLARE_ERROR_TYPE (errorType)
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  do
  {
    /* Build the content descriptor VtItem.
     */
#if VT_64_BIT_LENGTH == 64
    reportLen = (VtUInt64)(obj->contentInfo.len);
#else
    reportLen = obj->contentInfo.len;
#endif
    if ( (obj->formatType == VOLT_MESSAGE_FORMAT_SECURE_MAIL) ||
         (obj->formatType == VOLT_MESSAGE_FORMAT_ZDM_MAIL) )
    {
      /* Build the content-type: and content-length: lines. First, get
       * the length as ASCII characters.
       */
#if VT_64_BIT_LENGTH == 64
      currentLen = obj->dataLen64 + (VtUInt64)footerLen;
      numLo = (UInt32)currentLen;
      numHi = (UInt32)(currentLen >> 32);
#else
      currentLen = obj->dataLen + footerLen;
      VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_INVALID_INPUT_LENGTH;
      if (currentLen < footerLen)
        break;

      numLo = (UInt32)currentLen;
      numHi = (UInt32)0;
#endif

      VOLT_SET_ERROR_TYPE (errorType, 0)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = ConvertNumToAsciiAlloc (
        libCtx, numLo, numHi, &asciiNum, &asciiNumLen);
      if (status != 0)
        break;

      /* Build the content descriptor buffer, content type label, then
       * the content type, new line, content len label, then length,
       * new line.
       * If this is ZDM there's more to add.
       * Finally, one last new line.
       */
      VOLT_SET_FNCT_LINE (fnctLine)
      status = AppendToVtItem (
        libCtx, contentTypeLabel, VOLT_CONTENT_TYPE_LABEL_LEN,
        (unsigned char *)0, 0, report);
      if (status != 0)
        break;
      VOLT_SET_FNCT_LINE (fnctLine)
      status = AppendToVtItem (
        libCtx, obj->contentInfo.data, obj->contentInfo.len,
        newLine, newLineLen, report);
      if (status != 0)
        break;
      VOLT_SET_FNCT_LINE (fnctLine)
      status = AppendToVtItem (
        libCtx, contentLengthLabel, VOLT_CONTENT_LENGTH_LABEL_LEN,
        (unsigned char *)0, 0, report);
      if (status != 0)
        break;
      VOLT_SET_FNCT_LINE (fnctLine)
      status = AppendToVtItem (
        libCtx, asciiNum, asciiNumLen, newLine, newLineLen, report);
      if (status != 0)
        break;
      if (obj->formatType == VOLT_MESSAGE_FORMAT_ZDM_MAIL)
      {
        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, zdrUtcLine, VOLT_CONTENT_ZDR_UTC_LEN,
          (unsigned char *)0, 0, report);
        if (status != 0)
          break;

        VtGetTime ((VtLibCtx)libCtx, &theTime);
        VoltConvertVtTimeToUTC (&theTime, utcTime);
        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, utcTime, VOLT_UTC_LEN, newLine, newLineLen, report);
        if (status != 0)
          break;

        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, zdrFromLine, VOLT_CONTENT_ZDR_FROM_LEN,
          (unsigned char *)0, 0, report);
        if (status != 0)
          break;

        /* Get the email address of the sender.
         * If we can't get the email address out, don't quit, just
         * print a blank line.
         */
        tempItem.data = (unsigned char *)0;
        tempItem.len = 0;
        VOLT_SET_FNCT_LINE (fnctLine)
        status = VtGetIdentityParam (
          writeCtx->senderIdRef, VtIdentityParamCommonName,
          (Pointer *)&getName);
        if (status == 0)
          tempItem = *getName;

        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, tempItem.data, tempItem.len, newLine, newLineLen, report);
        if (status != 0)
          break;

        /* Print out the list of recipients.
         */
        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, zdrToLine, VOLT_CONTENT_ZDR_TO_LEN,
          (unsigned char *)0, 0, report);
        if (status != 0)
          break;

        VOLT_SET_FNCT_LINE (fnctLine)
        status = VtGetIdentityListCount (
          writeCtx->recipListRef, &count, &maxIndex);
        if (status != 0)
          break;

        for (index = 0; index <= maxIndex; ++index)
        {
          VOLT_SET_FNCT_LINE (fnctLine)
          status = VtGetIdentityListIdentity (
            writeCtx->recipListRef, index, &getId);
          if (status == VT_ERROR_NO_ID_AT_INDEX)
            continue;
          if (status != 0)
            break;

          tempItem.data = (unsigned char *)0;
          tempItem.len = 0;
          VOLT_SET_FNCT_LINE (fnctLine)
          status = VtGetIdentityParam (
            getId, VtIdentityParamCommonName, (Pointer *)&getName);
          if (status == 0)
            tempItem = *getName;

          if (index != maxIndex)
          {
            /* If this is not the last email, we'll need a comma after
             * the address.
             */
            VOLT_SET_FNCT_LINE (fnctLine)
            status = AppendToVtItem (
              libCtx, tempItem.data, tempItem.len,
              commaSpace, VOLT_CONTENT_COMMA_SPACE_LEN, report);
            if (status != 0)
              break;
          }
          else
          {
            /* If this is the last email, start a new line after the
             * address.
             */
            VOLT_SET_FNCT_LINE (fnctLine)
            status = AppendToVtItem (
              libCtx, tempItem.data, tempItem.len, newLine, newLineLen,
              report);
            if (status != 0)
              break;
          }
        }
        if (status != 0)
          break;

        /* Finally, the subject.
         */
        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, zdrSubjectLine, VOLT_CONTENT_ZDR_SUBJECT_LEN,
          (unsigned char *)0, 0, report);
        if (status != 0)
          break;

        VOLT_SET_FNCT_LINE (fnctLine)
        status = AppendToVtItem (
          libCtx, writeCtx->itemArray[VOLT_WRITE_SM_ITEM_SUBJECT].data,
          writeCtx->itemArray[VOLT_WRITE_SM_ITEM_SUBJECT].len,
          newLine, newLineLen, report);
        if (status != 0)
          break;
      }
      VOLT_SET_FNCT_LINE (fnctLine)
      status = AppendToVtItem (
        libCtx, newLine, newLineLen, (unsigned char *)0, 0, report);
      if (status != 0)
        break;

      reportLen = report->len;
    }
    else if (obj->formatType == VOLT_MESSAGE_FORMAT_SECURE_MAIL_2)
    {
      reportLen += (2 * newLineLen);

      VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_MEMORY;
      report->data = (unsigned char *)Z2Realloc (report->data, reportLen);
      if (report->data == (unsigned char *)0)
        break;

      /* For SecureMail 2, the headers inside the PKCS7 blob consist of some
       * XML data (instead of the MIME-style headers used with V1. So we don't
       * need to prepend the content-type label before writing the header data.
       */
      Z2Memcpy(report->data, obj->contentInfo.data, obj->contentInfo.len);
      offset = obj->contentInfo.len;
      /* A blank line indicates the end of the headers, so add 2 new lines */
      Z2Memcpy (report->data + offset, newLine, newLineLen);
      offset += newLineLen;
      Z2Memcpy (report->data + offset, newLine, newLineLen);
      report->len = (unsigned int)reportLen;
    }
    else
    {
      /* Build the content-type: ...; file-name= line. Add in the label
       * and 2 new lines.
       */
      if (reportLen != 0)
      {
        contentType = (char *)(obj->contentInfo.data);
        asciiNumLen = obj->contentInfo.len;
      }
      else
      {
        reportLen = VOLT_SECURE_FILE_CONTENT_LEN;
        asciiNumLen = VOLT_SECURE_FILE_CONTENT_LEN;
      }

#if VT_64_BIT_LENGTH == 64
      reportLen += (VtUInt64)
        (VOLT_CONTENT_TYPE_LABEL_LEN + VOLT_FILE_NAME_LABEL_LEN +
        writeCtx->fileName.len + 3 + (2 * newLineLen));
#else
      reportLen +=
        VOLT_CONTENT_TYPE_LABEL_LEN + VOLT_FILE_NAME_LABEL_LEN +
        writeCtx->fileName.len + 3 + (2 * newLineLen);
#endif

      VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VT_ERROR_MEMORY;
      asciiNum = (unsigned char *)Z2Malloc ((unsigned int)reportLen, 0);
      if (asciiNum == (unsigned char *)0)
        break;

      /* Build the content descriptor buffer, content type for file
       * label, then the file name, new line, and new line.
       */
      Z2Memcpy (
        asciiNum, VOLT_CONTENT_TYPE_LABEL, VOLT_CONTENT_TYPE_LABEL_LEN);
      offset = VOLT_CONTENT_TYPE_LABEL_LEN;
      Z2Memcpy (asciiNum + offset, contentType, asciiNumLen);
      offset += asciiNumLen;
      Z2Memcpy (asciiNum + offset, "; ", 2);
      offset += 2;
      Z2Memcpy (
        asciiNum + offset, VOLT_FILE_NAME_LABEL, VOLT_FILE_NAME_LABEL_LEN);
      offset += VOLT_FILE_NAME_LABEL_LEN;
      Z2Memcpy (
        asciiNum + offset, writeCtx->fileName.data, writeCtx->fileName.len);
      offset += writeCtx->fileName.len;
      Z2Memcpy (asciiNum + offset, ";", 1);
      offset += 1;
      /* After the file name, newLine, then a blank line.
       */
      Z2Memcpy (asciiNum + offset, newLine, newLineLen);
      offset += newLineLen;
      Z2Memcpy (asciiNum + offset, newLine, newLineLen);

      if (report->data != (unsigned char *)0)
        Z2Free (report->data);
      report->data = (unsigned char *)asciiNum;
      report->len = (unsigned int)reportLen;
      asciiNum = (char *)0;
    }

    /* Set the length of the SignedData. The length is the reportLen
     * plus the dataLen plus the content footerLen.
     */
#if VT_64_BIT_LENGTH == 64
    reportLen += obj->dataLen64;
    reportLen += (VtUInt64)footerLen;
    VOLT_SET_ERROR_TYPE (errorType, 0)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtSetPkcs7Param (
      obj->p7SignedData, VtPkcs7ParamDataLen64, (Pointer)&reportLen);
    if (status != 0)
      break;
#else
    reportLen += (obj->dataLen + footerLen);
    VOLT_SET_ERROR_TYPE (errorType, 0)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtSetPkcs7Param (
      obj->p7SignedData, VtPkcs7ParamDataLen, (Pointer)&reportLen);
    if (status != 0)
      break;
#endif

#if VT_64_BIT_LENGTH == 64
    /* Call VtGetTotalOutputLen64 to determine how big the SignedData
     * will be.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtGetTotalOutputLen64 (
      (VtLibCtx)libCtx, VtGetOutputLen64ImplPkcs7,
      (Pointer)(obj->p7SignedData), &(writeCtx->signedDataLen));
    if (status != 0)
      break;
#else
    /* Call Final with no output to determine length.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtPkcs7WriteFinal (
      obj->p7SignedData, random, (unsigned char *)0, reportLen,
      (unsigned char *)0, 0, &(writeCtx->signedDataLen));
    if (status == 0)
      status = VT_ERROR_GENERAL;
    if (status != VT_ERROR_BUFFER_TOO_SMALL)
      break;
#endif

    /* We now know how many bytes we're going to pass to the enveloper.
     */
#if VT_64_BIT_LENGTH == 64
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtSetPkcs7Param (