Revert "lib/mpi: Introduce ec implementation to MPI library"

This reverts commit d58bb7e5.

It's no longer needed since sm2 has been removed.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

include/linux/mpi.h

@@ -157,111 +157,6 @@ void mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor);
 /*-- mpi-inv.c --*/
 int mpi_invm(MPI x, MPI a, MPI n);
 
-/*-- ec.c --*/
-
-/* Object to represent a point in projective coordinates */
-struct gcry_mpi_point {
-	MPI x;
-	MPI y;
-	MPI z;
-};
-
-typedef struct gcry_mpi_point *MPI_POINT;
-
-/* Models describing an elliptic curve */
-enum gcry_mpi_ec_models {
-	/* The Short Weierstrass equation is
-	 *      y^2 = x^3 + ax + b
-	 */
-	MPI_EC_WEIERSTRASS = 0,
-	/* The Montgomery equation is
-	 *      by^2 = x^3 + ax^2 + x
-	 */
-	MPI_EC_MONTGOMERY,
-	/* The Twisted Edwards equation is
-	 *      ax^2 + y^2 = 1 + bx^2y^2
-	 * Note that we use 'b' instead of the commonly used 'd'.
-	 */
-	MPI_EC_EDWARDS
-};
-
-/* Dialects used with elliptic curves */
-enum ecc_dialects {
-	ECC_DIALECT_STANDARD = 0,
-	ECC_DIALECT_ED25519,
-	ECC_DIALECT_SAFECURVE
-};
-
-/* This context is used with all our EC functions. */
-struct mpi_ec_ctx {
-	enum gcry_mpi_ec_models model; /* The model describing this curve. */
-	enum ecc_dialects dialect;     /* The ECC dialect used with the curve. */
-	int flags;                     /* Public key flags (not always used). */
-	unsigned int nbits;            /* Number of bits.  */
-
-	/* Domain parameters.  Note that they may not all be set and if set
-	 * the MPIs may be flagged as constant.
-	 */
-	MPI p;         /* Prime specifying the field GF(p).  */
-	MPI a;         /* First coefficient of the Weierstrass equation.  */
-	MPI b;         /* Second coefficient of the Weierstrass equation.  */
-	MPI_POINT G;   /* Base point (generator).  */
-	MPI n;         /* Order of G.  */
-	unsigned int h;       /* Cofactor.  */
-
-	/* The actual key.  May not be set.  */
-	MPI_POINT Q;   /* Public key.   */
-	MPI d;         /* Private key.  */
-
-	const char *name;      /* Name of the curve.  */
-
-	/* This structure is private to mpi/ec.c! */
-	struct {
-		struct {
-			unsigned int a_is_pminus3:1;
-			unsigned int two_inv_p:1;
-		} valid; /* Flags to help setting the helper vars below.  */
-
-		int a_is_pminus3;  /* True if A = P - 3. */
-
-		MPI two_inv_p;
-
-		mpi_barrett_t p_barrett;
-
-		/* Scratch variables.  */
-		MPI scratch[11];
-
-		/* Helper for fast reduction.  */
-		/*   int nist_nbits; /\* If this is a NIST curve, the # of bits. *\/ */
-		/*   MPI s[10]; */
-		/*   MPI c; */
-	} t;
-
-	/* Curve specific computation routines for the field.  */
-	void (*addm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ctx);
-	void (*subm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ec);
-	void (*mulm)(MPI w, MPI u, MPI v, struct mpi_ec_ctx *ctx);
-	void (*pow2)(MPI w, const MPI b, struct mpi_ec_ctx *ctx);
-	void (*mul2)(MPI w, MPI u, struct mpi_ec_ctx *ctx);
-};
-
-void mpi_ec_init(struct mpi_ec_ctx *ctx, enum gcry_mpi_ec_models model,
-			enum ecc_dialects dialect,
-			int flags, MPI p, MPI a, MPI b);
-void mpi_ec_deinit(struct mpi_ec_ctx *ctx);
-MPI_POINT mpi_point_new(unsigned int nbits);
-void mpi_point_release(MPI_POINT p);
-void mpi_point_init(MPI_POINT p);
-void mpi_point_free_parts(MPI_POINT p);
-int mpi_ec_get_affine(MPI x, MPI y, MPI_POINT point, struct mpi_ec_ctx *ctx);
-void mpi_ec_add_points(MPI_POINT result,
-			MPI_POINT p1, MPI_POINT p2,
-			struct mpi_ec_ctx *ctx);
-void mpi_ec_mul_point(MPI_POINT result,
-			MPI scalar, MPI_POINT point,
-			struct mpi_ec_ctx *ctx);
-int mpi_ec_curve_point(MPI_POINT point, struct mpi_ec_ctx *ctx);
-
 /* inline functions */
 
 /**

lib/crypto/mpi/Makefile

@@ -13,7 +13,6 @@ mpi-y = \
 	generic_mpih-rshift.o		\
 	generic_mpih-sub1.o		\
 	generic_mpih-add1.o		\
-	ec.o				\
 	mpicoder.o			\
 	mpi-add.o			\
 	mpi-bit.o			\