DLPSetDP¶
Sets up a particular domain parameter of the DL-based cryptosystem over GF(p).
Syntax¶
IppStatus ippsDLPSetDP(const IppsBigNumState* pDP, IppDLPKeyTag tag, IppsDLPState* pCtx);
Include Files¶
ippcp.h
Parameters¶
pDP |
Pointer to the domain parameter value to be set. |
tag |
Tag specifying the desired domain parameter. |
pCtx |
Pointer to the cryptosystem context. |
Description¶
The function assigns the value specified by pDP to a particular domain parameter of the DL-based cryptosystem. The domain parameter to be set up is determined by tag as follows:
If tag == IppDLPkeyP, the function assigns value to the characteristic p, the size of the prime finite field GF(p).
If tag == IppDLPkeyR, the function assigns value to the characteristic r, the prime divisor of (p-1) and the order of g.
If tag == IppDLPkeyG, the function assigns value to the characteristic g, the element of GF(p) generating a multiplicative subgroup of order r.
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. |
ippStsRangeErr |
Indicates an error condition if the Big Number specified by pDP is too big to be stored in the IppsDLPState context. |
ippStsBadArgErr |
Indicates an error condition if some of the function parameters are invalid:
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