GetTimeValue, CSSM_GetTimeValue, CSP_GetTimeValue - Get a CSP time
# include <cdsa/cssm.h>
API: CSSM_RETURN CSSMAPI CSSM_GetTimeValue (CSSM_CSP_HANDLE CSPHandle,
CSSM_ALGORITHMS TimeAlgorithm, CSSM_DATA *TimeData) SPI: CSSM_RETURN
CSSMCSPI CSP_GetTimeValue (CSSM_CSP_HANDLE CSPHandle, CSSM_ALGORITHMS
TimeAlgorithm, kCSSM_DATA *TimeData)
Common Security Services Manager library (libcssm.so)
Handle of the cryptographic service provider that will perform the
operation. A CSSM algorithm type that indicates the method for fetch‐
ing the time. The following algorithm types are currently supported:
CSSM_ALGID_UTC Returns a time value in the form YYYYMMDDhhmmss
(4 characters for the year; 2 characters each for the month, the
day, the hour, the minute, and the second). The time returned is
CSSM_ALGID_RUNNING_COUNTER The current value of a running hard‐
ware counter that operates while the device is in operation.
This value can be read from a processor counter provided by some
platform architectures. The time value of counter value
returned in response to the request.
This function returns a time value maintained by a CSP. This feature
will be supported primarily by hardware tokens with an onboard real
The output is returned to the caller either by filling the caller-spec‐
ified 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 out‐
put 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
Some tokens require authentication before returning a time value.
A CSSM_RETURN value indicating success or specifying a particular error
condition. The value CSSM_OK indicates success. All other values repre‐
sent an error condition.
Errors are described in the CDSA technical standard. See
None specific to this call.
Intel CDSA Application Developer's Guide (see CDSA_intro(3))