-int ec_GF2m_simple_point_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *point,
- BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
- {
- int ret = 0;
-
- if (EC_POINT_is_at_infinity(group, point))
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT_GET_AFFINE_COORDINATES, EC_R_POINT_AT_INFINITY);
- return 0;
- }
-
- if (BN_cmp(&point->Z, BN_value_one()))
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT_GET_AFFINE_COORDINATES, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (x != NULL)
- {
- if (!BN_copy(x, &point->X)) goto err;
- BN_set_sign(x, 0);
- }
- if (y != NULL)
- {
- if (!BN_copy(y, &point->Y)) goto err;
- BN_set_sign(y, 0);
- }
- ret = 1;
-
- err:
- return ret;
- }
-
-
-/* Include patented algorithms. */
-#include "ec2_smpt.c"
-
-
-/* Converts an EC_POINT to an octet string.
- * If buf is NULL, the encoded length will be returned.
- * If the length len of buf is smaller than required an error will be returned.
- *
- * The point compression section of this function is patented by Certicom Corp.
- * under US Patent 6,141,420. Point compression is disabled by default and can
- * be enabled by defining the preprocessor macro OPENSSL_EC_BIN_PT_COMP at
- * Configure-time.
- */
-size_t ec_GF2m_simple_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
- unsigned char *buf, size_t len, BN_CTX *ctx)
- {
- size_t ret;
- BN_CTX *new_ctx = NULL;
- int used_ctx = 0;
- BIGNUM *x, *y, *yxi;
- size_t field_len, i, skip;
-
-#ifndef OPENSSL_EC_BIN_PT_COMP
- if ((form == POINT_CONVERSION_COMPRESSED) || (form == POINT_CONVERSION_HYBRID))
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_DISABLED);
- goto err;
- }
-#endif
-
- if ((form != POINT_CONVERSION_COMPRESSED)
- && (form != POINT_CONVERSION_UNCOMPRESSED)
- && (form != POINT_CONVERSION_HYBRID))
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_INVALID_FORM);
- goto err;
- }
-
- if (EC_POINT_is_at_infinity(group, point))
- {
- /* encodes to a single 0 octet */
- if (buf != NULL)
- {
- if (len < 1)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
- return 0;
- }
- buf[0] = 0;
- }
- return 1;
- }
-
-
- /* ret := required output buffer length */
- field_len = (EC_GROUP_get_degree(group) + 7) / 8;
- ret = (form == POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2*field_len;
-
- /* if 'buf' is NULL, just return required length */
- if (buf != NULL)
- {
- if (len < ret)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
- goto err;
- }
-
- if (ctx == NULL)
- {
- ctx = new_ctx = BN_CTX_new();
- if (ctx == NULL)
- return 0;
- }
-
- BN_CTX_start(ctx);
- used_ctx = 1;
- x = BN_CTX_get(ctx);
- y = BN_CTX_get(ctx);
- yxi = BN_CTX_get(ctx);
- if (yxi == NULL) goto err;
-
- if (!EC_POINT_get_affine_coordinates_GF2m(group, point, x, y, ctx)) goto err;
-
- buf[0] = form;
-#ifdef OPENSSL_EC_BIN_PT_COMP
- if ((form != POINT_CONVERSION_UNCOMPRESSED) && !BN_is_zero(x))
- {
- if (!group->meth->field_div(group, yxi, y, x, ctx)) goto err;
- if (BN_is_odd(yxi)) buf[0]++;
- }
-#endif
-
- i = 1;
-
- skip = field_len - BN_num_bytes(x);
- if (skip > field_len)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- while (skip > 0)
- {
- buf[i++] = 0;
- skip--;
- }
- skip = BN_bn2bin(x, buf + i);
- i += skip;
- if (i != 1 + field_len)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
-
- if (form == POINT_CONVERSION_UNCOMPRESSED || form == POINT_CONVERSION_HYBRID)
- {
- skip = field_len - BN_num_bytes(y);
- if (skip > field_len)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- while (skip > 0)
- {
- buf[i++] = 0;
- skip--;
- }
- skip = BN_bn2bin(y, buf + i);
- i += skip;
- }
-
- if (i != ret)
- {
- ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- }
-
- if (used_ctx)
- BN_CTX_end(ctx);
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
- return ret;
+int ec_GF2m_simple_point_set_affine_coordinates(const EC_GROUP *group,
+ EC_POINT *point,
+ const BIGNUM *x,
+ const BIGNUM *y, BN_CTX *ctx)
+{
+ int ret = 0;
+ if (x == NULL || y == NULL) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT_SET_AFFINE_COORDINATES,
+ ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ if (!BN_copy(point->X, x))
+ goto err;
+ BN_set_negative(point->X, 0);
+ if (!BN_copy(point->Y, y))
+ goto err;
+ BN_set_negative(point->Y, 0);
+ if (!BN_copy(point->Z, BN_value_one()))
+ goto err;
+ BN_set_negative(point->Z, 0);
+ point->Z_is_one = 1;
+ ret = 1;