GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
goto err;
}
- EVP_MD_CTX_init(mdctx);
- EVP_DigestInit_ex(mdctx, md, NULL);
- EVP_DigestUpdate(mdctx, databuf, buf_len);
- EVP_DigestFinal_ex(mdctx, shared_key, NULL);
+
+ if (EVP_MD_CTX_init(mdctx) == 0
+ || EVP_DigestInit_ex(mdctx, md, NULL) == 0
+ || EVP_DigestUpdate(mdctx, databuf, buf_len) == 0
+ || EVP_DigestFinal_ex(mdctx, shared_key, NULL) == 0) {
+ GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_EVP_LIB);
+ goto err;
+ }
+
ret = (EVP_MD_size(md) > 0) ? EVP_MD_size(md) : 0;
err:
o q * Q_eph is not equal to zero point.
*/
+ if (data->shared_ukm == NULL && pst->ukm != NULL) {
+ if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_SET_IV,
+ ASN1_STRING_length(pst->ukm), (void *)ASN1_STRING_get0_data(pst->ukm)) < 0) {
+ GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_UKM_NOT_SET);
+ goto err;
+ }
+ }
+
+ if (data->shared_ukm == NULL) {
+ GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_UKM_NOT_SET);
+ goto err;
+ }
+
if (gost_keg(data->shared_ukm, pkey_nid,
EC_KEY_get0_public_key(EVP_PKEY_get0(eph_key)),
EVP_PKEY_get0(priv), expkeys) <= 0) {