NAME
   EncryptDataUpdate,
   CSSM_EncryptDataUpdate,
   CSP_EncryptDataUpdate  - Continue the staged encryption process (CDSA)

 SYNOPSIS
   # include <cssm.h>

    API:
        CSSM_RETURN CSSMAPI CSSM_EncryptDataUpdate
        (CSSM_CC_HANDLE CCHandle,
        const CSSM_DATA *ClearBufs,
        uint32 ClearBufCount,
        CSSM_DATA_PTR CipherBufs,
        uint32 CipherBufCount,
        uint32 *bytesEncrypted)
    SPI:
        CSSM_RETURN CSSMCSPI CSP_EncryptDataUpdate
        (CSSM_CSP_HANDLE CSPHandle,
        CSSM_CC_HANDLE CCHandle,
        const CSSM_DATA *ClearBufs,
        uint32 ClearBufCount,
        CSSM_DATA_PTR CipherBufs,
        uint32 CipherBufCount,
        uint32 *bytesEncrypted)

 LIBRARY
   Common Security Services Manager library (CDSA$INCSSM300_SHR.EXE)

 API PARAMETERS
   CCHandle (input)
           The handle that describes the context of this cryptographic
           operation used to link to the CSP-managed information.

   ClearBufs (input)
           A pointer to a vector of CSSM_DATA structures that contain
           the data to be operated on.

   ClearBufCount (input)
           The number of ClearBufs.

   CipherBufs (output)
           A pointer to a vector of CSSM_DATA structures that contain the
           encrypted data resulting from the encryption operation.

   CipherBufCount (input)
           The number of CipherBufs.

   bytesEncrypted (output)
           A pointer to uint32 for the size of the encrypted data in
           bytes.

 SPI PARAMETERS
   CSPHandle (input)
           The handle that describes the add-in cryptographic service
           provider module used to perform calls to CSSM for the memory
           functions managed by CSSM.

 DESCRIPTION
   This function continues the staged encryption process over all data in
   the set of input buffers. There can be algorithm-specific and token-
   specific rules restricting the lengths of data in CSSM_EncryptUpdate()
   calls, but multiple input buffers are supported. The minimum number of
   buffers required to contain the resulting cipher text is produced as
   output. Excess output buffer space is not remembered across staged
   encryption calls. Each staged call begins filling one or more new
   output buffers. The CSSM_QuerySize() function can be used to estimate
   the output buffer size required for each update call.

 RETURN VALUE
   A CSSM_RETURN value indicating success or specifying a particular
   error condition. The value CSSM_OK indicates success. All other
   values represent an error condition.

 ERRORS
   Errors are described in the CDSA technical standard.  See CDSA.

   None specific to this call.

 NOTES FOR API
   The output is returned to the caller either by filling the caller-
   specified buffer or by using the application's declared memory
   allocation functions to allocate buffer space. To specify a specific,
   preallocated output buffer, the caller must provide an array of one
   or more CSSM_DATA structures, each containing a Length field value
   greater than zero and a non-NULL Data pointer field value. To specify
   automatic output buffer allocation by the CSP, the caller must provide
   an array of one or more CSSM_DATA structures, each containing a Length
   field value equal to zero and a NULL data pointer field value. The
   application is always responsible for deallocating the memory when it
   is no longer needed. In-place encryption can be done by supplying the
   same input and output buffers.

 NOTES FOR SPI
   The output is returned to the caller as specified in Buffer Management
   for Cryptographic Services.

 SEE ALSO
   Books

   Intel CDSA Application Developer's Guide (see CDSA)

   Other Help Topics

   Functions for the CSSM API:

       CSSM_QuerySize
       CSSM_DecryptData
       CSSM_EncryptDataInit
       CSSM_EncryptDataUpdate
       CSSM_EncryptDataFinal
       CSSM_EncryptDataP
       CSSM_EncryptDataInitP
       CSSM_DecryptP
       CSSM_DecryptDataInitP

   Functions for the CSP SPI:

       CSP_QuerySize
       CSP_DecryptData
       CSP_EncryptDataInit
       CSP_EncryptDataFinal