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Don't special-case a = -3, not worth it

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Manuel Pégourié-Gonnard
2013-10-10 15:55:39 +02:00
parent b8012fca5f
commit 0cd6f98c0f
2 changed files with 17 additions and 88 deletions
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5
include/polarssl/ecp.h
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@@ -105,9 +105,6 @@ ecp_point;
* The curves we consider are defined by y^2 = x^3 + A x + B mod P,
* and a generator for a large subgroup of order N is fixed.
*
* If A is not set (ie A.p == NULL) then the value A = -3 is assumed,
* which allows the used of slightly faster point doubling formulas.
*
* pbits and nbits must be the size of P and N in bits.
*
* If modp is NULL, reduction modulo P is done using a generic algorithm.
@@ -121,7 +118,7 @@ typedef struct
{
ecp_group_id id; /*!< internal group identifier */
mpi P; /*!< prime modulus of the base field */
mpi A; /*!< linear term in the equation (default: -3) */
mpi A; /*!< linear term in the equation */
mpi B; /*!< constant term in the equation */
ecp_point G; /*!< generator of the subgroup used */
mpi N; /*!< the order of G */