Converts input positive integer big number into Montgomery form.
Syntax
IppStatus ippsMontForm(IppsBigNumState *a, IppsMontState *m, IppsBigNumState * r);
Parameters
a |
Input integer big number within the range [0, m - 1]. |
m |
Input big number modulus of IppsBigNumState. |
r |
Resulting Montgomery form r = a*R mod m. |
Description
This function is declared in the ippcp.h file. The function converts an input positive integer big number into the Montgomery form with respect to the big number modulus and stores the conversion result.
The following pseudocode represents this function:
r ← a *R mod m.
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. |
ippStsBadArgErr |
Indicates an error condition if a is a negative integer. |
ippStsScaleRangeErr |
Indicates an error condition if a is more than m. |
ippStsOutOfRangeErr |
Indicates an error condition if IppsBigNumState *r is larger than IppsMontState *m. |
Note
The size of IppsBigNumState *r should not be less than the data length of the modulus m.