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. |