ECCPGenKeyPair
ECCPGenKeyPair
Generates a private key and computes public keys of the elliptic cryptosystem over GF(p).
Syntax
IppStatus ippsECCPGenKeyPair(IppsBigNumState*
pPrivate
, IppsECCPPointState*
pPublic
, IppsECCPState*
pECC
, IppBitSupplier
rndFunc
, void*
pRndParam
);
Include Files
ippcp.h
Parameters
- pPrivate
- Pointer to the private keyprivKey.
- pPublic
- Pointer to the public keypubKey.
- pECC
- Pointer to the context of the elliptic cryptosystem.
- rndFunc
- Specified Random Generator.
- pRndParam
- Pointer to the Random Generator context.
Description
The function generates a private key
privKey
and computes a public key pubKey
of the elliptic cryptosystem over a finite field GF(p
). The generation process employs the user specified rndFunc
Random Generator.The private key
privKey
is a number that lies in the range of [1, n
-1] where n
is the order of the elliptic curve base point. The public key
pubKey
is an elliptic curve point such that pubKey = privKey
·
G
, where G
is the base point of the elliptic curve. The memory size of the parameter
privKey
pointed by pPrivate
must be less than that of the base point which can also be defined by the function ECCPGetOrderBitSize
. The context of the point
pubKey
as an elliptic curve point must be created by using the functions ECCPPointGetSize
and ECCPPointInit
. The elliptic curve domain parameters must be hitherto defined by one of the functions:
ECCPSet
or ECCPSetStd
.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 isNULL.
- ippStsContextMatchErr
- Indicates an error condition if one of the contexts pointed bypPrivate,pPublic, orpECCis not valid.
- ippStsSizeErr
- Indicates an error condition if the memory size of the parameterprivKeypointed bypPrivateis less than that of the order of the elliptic curve base point.