Developer Reference

Contents

DLPGenerateDSA

Generates domain parameters of the DL-based cryptosystem over GF(p) to use DSA.

Syntax

IppStatus ippsDLPGenerateDSA(const IppsBigNumState*
pSeedIn
, int
nTrials
, IppsDLPState*
pCtx
, IppsBigNumState*
pSeedOut
, int*
pCounter
, IppBitSupplier
rndFunc
, void*
pRndParam
);
Include Files
ippcp.h
Parameters
pSeedIn
Pointer to the input
Seed
.
nTrials
Security parameter specified for the Miller-Rabin probable primality.
pCtx
Pointer to the cryptosystem context.
pSeedOut
Pointer to the output
Seed
value (if requested).
pCounter
Pointer to the
counter
value (if requested).
rndFunc
Specified Random Generator.
pRndParam
Pointer to the Random Generator context.
Description
The function generates domain parameters of the DL-based cryptosystem over GF(
p
) to use DSA. The function uses a procedure specified in [FIPS PUB 186-2] for generating both a 160-bit randomized prime r and a
LpeBits
prime
p
based on the input
*pSeedIn
.
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.
ippStsSizeErr
Indicates an error condition if:
peBits
< 512,
peBits
is not divided by 64,
reBits
!= 160.
ippStsRangeErr
Indicates an error condition if: bitsize of the input
Seed
value is less than 160, bitsize of the input
Seed
value is greater than
peBits
, not enough space to store the output
Seed
value (if requested).
ippStsBadArgErr
Indicates an error condition if
nTrials
< 1.
ippStsInsuffucientEntropy
Indicates a warning condition if prime generation fails due to a poor choice of the entropy.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.