/* crypto/ec/ecp_nist.c */
+/*
+ * Written by Nils Larsch for the OpenSSL project.
+ */
/* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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 <openssl/obj_mac.h>
#include "ec_lcl.h"
-
const EC_METHOD *EC_GFp_nist_method(void)
{
static const EC_METHOD ret = {
+ NID_X9_62_prime_field,
ec_GFp_nist_group_init,
- ec_GFp_nist_group_set_curve_GFp,
ec_GFp_nist_group_finish,
ec_GFp_nist_group_clear_finish,
ec_GFp_nist_group_copy,
- ec_GFp_simple_group_set_generator,
- /* TODO: 'set' and 'get' functions for EC_GROUPs */
+ ec_GFp_nist_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,
ec_GFp_simple_point_set_to_infinity,
- ec_GFp_simple_point_set_affine_coordinates_GFp,
- ec_GFp_simple_point_get_affine_coordinates_GFp,
- /* TODO: other 'set' and 'get' functions for EC_POINTs */
+ 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_simple_points_make_affine,
ec_GFp_nist_field_mul,
ec_GFp_nist_field_sqr,
- ec_GFp_nist_field_encode,
- ec_GFp_nist_field_decode };
+ 0 /* field_div */,
+ 0 /* field_encode */,
+ 0 /* field_decode */,
+ 0 /* field_set_to_one */ };
return &ret;
}
+#define ECP_MOD_CAST \
+ (int (*)(BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *))
+
+#if BN_BITS2 == 64 && UINT_MAX != 4294967295UL && ULONG_MAX != 4294967295UL
+#define NO_32_BIT_TYPE
+#endif
int ec_GFp_nist_group_init(EC_GROUP *group)
{
int ok;
ok = ec_GFp_simple_group_init(group);
- group->field_data = NULL;
+ group->field_data1 = NULL;
return ok;
}
+void ec_GFp_nist_group_finish(EC_GROUP *group)
+ {
+ BN_free(&group->field);
+ BN_free(&group->a);
+ BN_free(&group->b);
+ }
+
+
+void ec_GFp_nist_group_clear_finish(EC_GROUP *group)
+ {
+ BN_clear_free(&group->field);
+ BN_clear_free(&group->a);
+ BN_clear_free(&group->b);
+ }
+
+
+int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p,
+ const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+ {
+ int ret = 0;
+ BN_CTX *new_ctx = NULL;
+ BIGNUM *tmp_bn;
+
+ if (ctx == NULL)
+ if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0;
+
+ BN_CTX_start(ctx);
+ if ((tmp_bn = BN_CTX_get(ctx)) == NULL) goto err;
+
+ if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0)
+ group->field_data1 = (void *)BN_nist_mod_192;
+ else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0)
+#if !defined(ECP_NO_32_BIT_TYPE) || defined(OPENSSL_NO_ASM)
+ group->field_data1 = (void *)BN_nist_mod_224;
+#else
+ goto err;
+#endif
+ else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0)
+#if !defined(ECP_NO_32_BIT_TYPE) || defined(OPENSSL_NO_ASM)
+ group->field_data1 = (void *)BN_nist_mod_256;
+#else
+ goto err;
+#endif
+ else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0)
+#if !defined(ECP_NO_32_BIT_TYPE) || defined(OPENSSL_NO_ASM)
+ group->field_data1 = (void *)BN_nist_mod_384;
+#else
+ goto err;
+#endif
+ else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0)
+ group->field_data1 = (void *)BN_nist_mod_521;
+ else
+ {
+ ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE_GFP,
+ EC_R_PRIME_IS_NOT_A_NIST_PRIME);
+ goto err;
+ }
+
+ /* group->field */
+ if (!BN_copy(&group->field, p)) goto err;
+ group->field.neg = 0;
+
+ /* group->a */
+ (ECP_MOD_CAST group->field_data1)(&group->a, a, p, ctx);
+
+ /* group->b */
+ (ECP_MOD_CAST group->field_data1)(&group->b, b, p, ctx);
+
+ /* group->a_is_minus3 */
+ if (!BN_add_word(tmp_bn, 3)) goto err;
+ group->a_is_minus3 = (0 == BN_cmp(tmp_bn, &group->field));
+
+ ret = 1;
-int ec_GFp_nist_group_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
-/* TODO */
+ err:
+ BN_CTX_end(ctx);
+ if (new_ctx != NULL)
+ BN_CTX_free(new_ctx);
+ return ret;
+ }
+int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src)
+ {
+ if (dest == NULL || src == NULL)
+ return 0;
-void ec_GFp_nist_group_finish(EC_GROUP *group);
-/* TODO */
+ if (!BN_copy(&dest->field, &src->field))
+ return 0;
+ if (!BN_copy(&dest->a, &src->a))
+ return 0;
+ if (!BN_copy(&dest->b, &src->b))
+ return 0;
+ dest->curve_name = src->curve_name;
-void ec_GFp_nist_group_clear_finish(EC_GROUP *group);
-/* TODO */
+ dest->a_is_minus3 = src->a_is_minus3;
+ dest->field_data1 = src->field_data1;
-int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src);
-/* TODO */
+ return 1;
+ }
+int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
+ const BIGNUM *b, BN_CTX *ctx)
+ {
+ int ret=0;
+ BN_CTX *ctx_new=NULL;
-int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
-/* TODO */
+ if (!group || !r || !a || !b)
+ {
+ ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER);
+ goto err;
+ }
+ if (!ctx)
+ if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
+ if (!BN_mul(r, a, b, ctx)) goto err;
+ if (!(ECP_MOD_CAST group->field_data1)(r, r, &group->field, ctx))
+ goto err;
-int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+ ret=1;
+err:
+ if (ctx_new)
+ BN_CTX_free(ctx_new);
+ return ret;
+ }
+int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
+ BN_CTX *ctx)
+ {
+ int ret=0;
+ BN_CTX *ctx_new=NULL;
-int ec_GFp_nist_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+ if (!group || !r || !a)
+ {
+ ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER);
+ goto err;
+ }
+ if (!ctx)
+ if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err;
+ if (!BN_sqr(r, a, ctx)) goto err;
+ if (!(ECP_MOD_CAST group->field_data1)(r, r, &group->field, ctx))
+ goto err;
-int ec_GFp_nist_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+ ret=1;
+err:
+ if (ctx_new)
+ BN_CTX_free(ctx_new);
+ return ret;
+ }
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