#include "gost_lcl.h"
/* Implementation of CryptoPro VKO 34.10-2001/2012 algorithm */
-static int VKO_compute_key(unsigned char *shared_key,
- const EC_POINT *pub_key, const EC_KEY *priv_key,
- const unsigned char *ukm, const size_t ukm_size,
- const int vko_dgst_nid)
+int VKO_compute_key(unsigned char *shared_key,
+ const EC_POINT *pub_key, const EC_KEY *priv_key,
+ const unsigned char *ukm, const size_t ukm_size,
+ const int vko_dgst_nid)
{
unsigned char *databuf = NULL;
BIGNUM *UKM = NULL, *p = NULL, *order = NULL, *X = NULL, *Y = NULL, *cofactor = NULL;
GOSTerr(GOST_F_VKO_COMPUTE_KEY, GOST_R_ERROR_POINT_MUL);
goto err;
}
- EC_POINT_get_affine_coordinates(EC_KEY_get0_group(priv_key),
- pnt, X, Y, ctx);
+ if (!EC_POINT_get_affine_coordinates(EC_KEY_get0_group(priv_key),
+ pnt, X, Y, ctx)) {
+ GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_EC_LIB);
+ goto err;
+ }
half_len = BN_num_bytes(order);
buf_len = 2 * half_len;