|
VMS Help CDSA, CDSA_API, EncryptData *Conan The Librarian |
NAME
EncryptData,
CSSM_EncryptData,
CSP_EncryptData - Encrypts all buffer data (CDSA)
SYNOPSIS
# include <cssm.h>
API:
CSSM_RETURN CSSMAPI CSSM_EncryptData
(CSSM_CC_HANDLE CCHandle,
const CSSM_DATA *ClearBufs,
uint32 ClearBufCount,
CSSM_DATA_PTR CipherBufs,
uint32 CipherBufCount,
uint32 *bytesEncrypted,
CSSM_DATA_PTR RemData)
SPI:
CSSM_RETURN CSSMCSPI CSP_EncryptData
(CSSM_CSP_HANDLE CSPHandle,
CSSM_CC_HANDLE CCHandle,
const CSSM_CONTEXT *Context,
const CSSM_DATA *ClearBufs,
uint32 ClearBufCount,
CSSM_DATA_PTR CipherBufs,
uint32 CipherBufCount,
uint32 *bytesEncrypted,
CSSM_DATA_PTR RemData,
CSSM_PRIVILEGE Privilege)
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 results of the operation on the data.
CipherBufCount (input)
The number of CipherBufs.
bytesEncrypted (output)
A pointer to uint32 for the size of the encrypted data in
bytes.
RemData (output)
A pointer to the CSSM_DATA structure for the remaining cipher
text if there is not enough buffer space available in the
output data structures.
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.
Context (input)
Pointer to CSSM_CONTEXT structure that describes the attributes
with this context.
Privilege (input)
The export privilege to be applied during the cryptographic
operation. This parameter is forwarded to the CSP after CSSM
verifies the caller and service provider privilege set includes
the specified PRIVILEGE.
DESCRIPTION
This function encrypts all data contained in the set of input buffers
using information in the context. The CSSM_QuerySize() function can be
used to estimate the output buffer size required. The minimum number
of buffers required to contain the resulting cipher text is produced
as output. If the cipher text result does not fit within the set of
output buffers, the remaining cipher text is returned in the single
output buffer RemData.
The CSP can require that the cryptographic context include access
credentials for authentication and authorization checks when using a
private key or a secret key.
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.
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.
CSSMERR_CSP_BLOCK_SIZE_MISMATCH
CSSMERR_CSP_OUTPUT_LENGTH_ERROR
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_EncryptDataUpdate
CSP_EncryptDataFinal
|
|