X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fec%2Fecp_mont.c;h=36f82368648aa504077069db7c7a2373e4dc3657;hp=ca08ebb152aac83297d627c4fa5e76b4f26c8e75;hb=46633554961a5950410ef5690093b56f1f06e752;hpb=58fc62296f9ed6eae19974ae8bdd47b340b1e850

diff --git a/crypto/ec/ecp_mont.c b/crypto/ec/ecp_mont.c
index ca08ebb152..36f8236864 100644
--- a/crypto/ec/ecp_mont.c
+++ b/crypto/ec/ecp_mont.c
@@ -1,5 +1,7 @@
-/* TODO */
 /* crypto/ec/ecp_mont.c */
+/*
+ * Originally written by Bodo Moeller for the OpenSSL project.
+ */
 /* ====================================================================
  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
  *
@@ -53,6 +55,13 @@
  * Hudson (tjh@cryptsoft.com).
  *
  */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * Portions of this software developed by SUN MICROSYSTEMS, INC.,
+ * and contributed to the OpenSSL project.
+ */
+
+#include <openssl/err.h>
 
 #include "ec_lcl.h"
 
@@ -60,29 +69,246 @@
 const EC_METHOD *EC_GFp_mont_method(void)
 	{
 	static const EC_METHOD ret = {
-		ec_GFp_simple_group_init,
-		ec_GFp_simple_group_set_curve_GFp,
-		ec_GFp_simple_group_finish,
-		ec_GFp_simple_group_clear_finish,
-		ec_GFp_simple_group_copy,
-		ec_GFp_simple_group_set_generator,
-		/* TODO: 'set' and 'get' functions for EC_GROUPs */
+		NID_X9_62_prime_field,
+		ec_GFp_mont_group_init,
+		ec_GFp_mont_group_finish,
+		ec_GFp_mont_group_clear_finish,
+		ec_GFp_mont_group_copy,
+		ec_GFp_mont_group_set_curve,
+		ec_GFp_simple_group_get_curve,
+		ec_GFp_simple_group_get_degree,
+		ec_GFp_simple_group_check_discriminant,
 		ec_GFp_simple_point_init,
 		ec_GFp_simple_point_finish,
 		ec_GFp_simple_point_clear_finish,
 		ec_GFp_simple_point_copy,
-		/* TODO: 'set' and 'get' functions for EC_POINTs */
+		ec_GFp_simple_point_set_to_infinity,
+		ec_GFp_simple_set_Jprojective_coordinates_GFp,
+		ec_GFp_simple_get_Jprojective_coordinates_GFp,
+		ec_GFp_simple_point_set_affine_coordinates,
+		ec_GFp_simple_point_get_affine_coordinates,
+		ec_GFp_simple_set_compressed_coordinates,
 		ec_GFp_simple_point2oct,
 		ec_GFp_simple_oct2point,
 		ec_GFp_simple_add,
 		ec_GFp_simple_dbl,
+		ec_GFp_simple_invert,
+		0 /* mul */,
+		0 /* precompute_mult */,
 		ec_GFp_simple_is_at_infinity,
 		ec_GFp_simple_is_on_curve,
+		ec_GFp_simple_cmp,
 		ec_GFp_simple_make_affine,
-		ec_GFp_mont_field_mult,
+		ec_GFp_simple_points_make_affine,
+		ec_GFp_mont_field_mul,
 		ec_GFp_mont_field_sqr,
+		0 /* field_div */,
 		ec_GFp_mont_field_encode,
-		ec_GFp_mont_field_decode };
+		ec_GFp_mont_field_decode,
+		ec_GFp_mont_field_set_to_one };
 
 	return &ret;
 	}
+
+
+int ec_GFp_mont_group_init(EC_GROUP *group)
+	{
+	int ok;
+
+	ok = ec_GFp_simple_group_init(group);
+	group->field_data1 = NULL;
+	group->field_data2 = NULL;
+	return ok;
+	}
+
+
+void ec_GFp_mont_group_finish(EC_GROUP *group)
+	{
+	if (group->field_data1 != NULL)
+		{
+		BN_MONT_CTX_free(group->field_data1);
+		group->field_data1 = NULL;
+		}
+	if (group->field_data2 != NULL)
+		{
+		BN_free(group->field_data2);
+		group->field_data2 = NULL;
+		}
+	ec_GFp_simple_group_finish(group);
+	}
+
+
+void ec_GFp_mont_group_clear_finish(EC_GROUP *group)
+	{
+	if (group->field_data1 != NULL)
+		{
+		BN_MONT_CTX_free(group->field_data1);
+		group->field_data1 = NULL;
+		}
+	if (group->field_data2 != NULL)
+		{
+		BN_clear_free(group->field_data2);
+		group->field_data2 = NULL;
+		}
+	ec_GFp_simple_group_clear_finish(group);
+	}
+
+
+int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src)
+	{
+	if (dest->field_data1 != NULL)
+		{
+		BN_MONT_CTX_free(dest->field_data1);
+		dest->field_data1 = NULL;
+		}
+	if (dest->field_data2 != NULL)
+		{
+		BN_clear_free(dest->field_data2);
+		dest->field_data2 = NULL;
+		}
+
+	if (!ec_GFp_simple_group_copy(dest, src)) return 0;
+
+	if (src->field_data1 != NULL)
+		{
+		dest->field_data1 = BN_MONT_CTX_new();
+		if (dest->field_data1 == NULL) return 0;
+		if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1)) goto err;
+		}
+	if (src->field_data2 != NULL)
+		{
+		dest->field_data2 = BN_dup(src->field_data2);
+		if (dest->field_data2 == NULL) goto err;
+		}
+
+	return 1;
+
+ err:
+	if (dest->field_data1 != NULL)
+		{
+		BN_MONT_CTX_free(dest->field_data1);
+		dest->field_data1 = NULL;
+		}
+	return 0;	
+	}
+
+
+int ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+	{
+	BN_CTX *new_ctx = NULL;
+	BN_MONT_CTX *mont = NULL;
+	BIGNUM *one = NULL;
+	int ret = 0;
+
+	if (group->field_data1 != NULL)
+		{
+		BN_MONT_CTX_free(group->field_data1);
+		group->field_data1 = NULL;
+		}
+	if (group->field_data2 != NULL)
+		{
+		BN_free(group->field_data2);
+		group->field_data2 = NULL;
+		}
+	
+	if (ctx == NULL)
+		{
+		ctx = new_ctx = BN_CTX_new();
+		if (ctx == NULL)
+			return 0;
+		}
+
+	mont = BN_MONT_CTX_new();
+	if (mont == NULL) goto err;
+	if (!BN_MONT_CTX_set(mont, p, ctx))
+		{
+		ECerr(EC_F_GFP_MONT_GROUP_SET_CURVE, ERR_R_BN_LIB);
+		goto err;
+		}
+	one = BN_new();
+	if (one == NULL) goto err;
+	if (!BN_to_montgomery(one, BN_value_one(), mont, ctx)) goto err;
+
+	group->field_data1 = mont;
+	mont = NULL;
+	group->field_data2 = one;
+	one = NULL;
+
+	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
+
+	if (!ret)
+		{
+		BN_MONT_CTX_free(group->field_data1);
+		group->field_data1 = NULL;
+		BN_free(group->field_data2);
+		group->field_data2 = NULL;
+		}
+
+ err:
+	if (new_ctx != NULL)
+		BN_CTX_free(new_ctx);
+	if (mont != NULL)
+		BN_MONT_CTX_free(mont);
+	return ret;
+	}
+
+
+int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+	{
+	if (group->field_data1 == NULL)
+		{
+		ECerr(EC_F_EC_GFP_MONT_FIELD_MUL, EC_R_NOT_INITIALIZED);
+		return 0;
+		}
+
+	return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx);
+	}
+
+
+int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
+	{
+	if (group->field_data1 == NULL)
+		{
+		ECerr(EC_F_EC_GFP_MONT_FIELD_SQR, EC_R_NOT_INITIALIZED);
+		return 0;
+		}
+
+	return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx);
+	}
+
+
+int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
+	{
+	if (group->field_data1 == NULL)
+		{
+		ECerr(EC_F_EC_GFP_MONT_FIELD_ENCODE, EC_R_NOT_INITIALIZED);
+		return 0;
+		}
+
+	return BN_to_montgomery(r, a, (BN_MONT_CTX *)group->field_data1, ctx);
+	}
+
+
+int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
+	{
+	if (group->field_data1 == NULL)
+		{
+		ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED);
+		return 0;
+		}
+
+	return BN_from_montgomery(r, a, group->field_data1, ctx);
+	}
+
+
+int ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx)
+	{
+	if (group->field_data2 == NULL)
+		{
+		ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED);
+		return 0;
+		}
+
+	if (!BN_copy(r, group->field_data2)) return 0;
+	return 1;
+	}