Developer Reference

Contents

DLPSetDP

Sets up a particular domain parameter of the DL-based cryptosystem over GF(p).

Syntax

IppStatus ippsDLPSetDP(const IppsBigNumState*
pDP
, IppDLPKeyTag
tag
, IppsDLPState*
pCtx
);
Include Files
ippcp.h
Parameters
pDP
Pointer to the domain parameter value to be set.
tag
Tag specifying the desired domain parameter.
pCtx
Pointer to the cryptosystem context.
Description
The function assigns the value specified by
pDP
to a particular domain parameter of the DL-based cryptosystem. The domain parameter to be set up is determined by
tag
as follows:
  • If
    tag
    ==
    IppDLPkeyP
    , the function assigns value to the characteristic
    p
    , the size of the prime finite field GF(
    p
    ).
  • If
    tag
    ==
    IppDLPkeyR
    , the function assigns value to the characteristic
    r
    , the prime divisor of (
    p
    -1) and the order of
    g.
  • If
    tag
    ==
    IppDLPkeyG
    , the function assigns value to the characteristic
    g,
    the element of GF(
    p
    ) generating a multiplicative subgroup of order
    r.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr
Indicates an error condition if any of the specified pointers is
NULL
.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.
ippStsRangeErr
Indicates an error condition if the Big Number specified by
pDP
is too big to be stored in the
IppsDLPState
context.
ippStsBadArgErr
Indicates an error condition if some of the function parameters are invalid:
  • Big Number specified by
    pDP
    is negative
  • Domain parameter specified by
    tag
    does not match the
    IppsDLPState
    context.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804