GFpECPrivateKey, GFpECPublicKey, GFpECTstKeyPair¶
Generates a private key of the elliptic curve cryptosystem over GF(p).
Syntax¶
IppStatus ippsGFpECPrivateKey(IppsBigNumState* pPrivate, IppsGFpECState* pEC, IppBitSupplier rndFunc, void* pRndParam);
IppStatus ippsGFpECPublicKey(const IppsBigNumState* pPrivate, IppsGFpECPoint* pPublic, IppsGFpECState* pEC, Ipp8u* pScratchBuffer);
IppStatus ippsGFpECTstKeyPair(const IppsBigNumState* pPrivate, const IppsGFpECPoint* pPublic, IppECResult* pResult, IppsGFpECState* pEC, Ipp8u* pScratchBuffer);
Include Files¶
ippcp.h
Parameters¶
pPrivate |
Pointer to the private key |
pPublic |
Pointer to the public key |
pEC |
Pointer to the context of the elliptic curve. |
rndFunc |
Specified Random Generator. |
pRndParam |
Pointer to the Random Generator context. |
pResult |
Pointer to the validation result. |
pScratchBuffer |
Pointer to the scratch buffer. Can be NULL. |
Description¶
The function generates a private key privKey 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 memory size of the parameter privKey pointed to by pPrivate must
be not less than order of the base point, which can also be defined by
the function
GFpECGetSubgroup.
The elliptic curve domain parameters must be hitherto defined by the functions: GFpECInitStd, GFpECInit, GFpECSet, or GFpECSetSubgroup.
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 any of the specified contexts does not match the operation. |
ippStsSizeErr |
Indicates an error condition if the parameter pointed to by pPrivate has a memory size that is less than the order |
ippStsIvalidPrivateKey |
Indicates an error condition if the value of the private key is less than that of the order of the elliptic curve base point. |