DLPGenKeyPair

Generates a private key and computes public keys of the DL-based cryptosystem over GF(p).

Syntax

IppStatus ippsDLPGenKeyPair(IppsBigNumState* pPrivate, IppsBigNumState* pPublic, IppsDLPState* pCtx, IppBitSupplier rndFunc, void* pRndParam);

Parameters

pPrivate	Pointer to the private key privKey.
pPublic	Pointer to the public key pubKey.
pCtx	Pointer to the cryptosystem context.
rndFunc	Specifed Random Generator.
pRndParam	Pointer to the Random Generator context.

Description

This function is declared in the ippcp.h file. The function generates a private key privKey and computes a public key pubKey of the DL-based cryptosystem. The function employs specified rndFunc Random Generator to generate a pseudorandom private key. The value of the private key privKey is a random number that lies in the range of [2,R-2].

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.
ippStsIncompleteContextErr	Indicates an error condition if the cryptosystem context has not been properly set up.
ippStsRangeErr	Indicates an error condition if any of the Big Numbers specified by pPrivate and pPublic is too small for the DL key.