Visible to Intel only — GUID: GUID-69BCD261-381E-4270-A43A-C82DA62F2CC5
Visible to Intel only — GUID: GUID-69BCD261-381E-4270-A43A-C82DA62F2CC5
MontSet
Sets the input integer big number to a value and computes the Montgomery reduction index.
Syntax
IppStatus ippsMontSet(const Ipp32u *pModulo, int size, IppsMontState *pCtx);
Include Files
ippcp.h
Parameters
pModulo |
Pointer to the input big number modulus. |
size |
The size of the modulus in Ipp32u chunks. |
pCtx |
Pointer to the context IppsMontState capturing the modulus and the least significant word of the multiplicative inverse Ni. |
Description
The function sets the input positive integer big number pModulo to be the modulus for the context IppsMontState *pCtx, computes the Montgomery reduction index k with respect to the input big number modulus pModulo and the least significant 32-bit word of the multiplicative inverse Ni with respect to the modulus R, that satisfies R*R-1- pModulo *Ni = 1.
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. |
ippStsBadModulusErr |
Indicates an error condition if the modulus is not a positive odd integer. |
ippStsLengthErr |
Indicates an error condition if size is less than or equal to 0. |
ippStsOutOfRangeErr |
Indicates an error condition if size is larger than IppsMontState*pCtx. |
ippStsContextMatchErr |
Indicates an error condition if pCtx does not match the operation. |