+
+int pkey_gost_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key,
+ size_t *key_len, const unsigned char *in, size_t in_len)
+{
+ struct gost_pmeth_data *gctx = EVP_PKEY_CTX_get_data(pctx);
+
+ if (key == NULL) {
+ *key_len = 32;
+ return 1;
+ }
+
+ if (key != NULL && *key_len < 32) {
+ GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, GOST_R_INVALID_BUFFER_SIZE);
+ return 0;
+ }
+
+ switch (gctx->cipher_nid)
+ {
+ case NID_id_Gost28147_89:
+ case NID_undef: /* FIXME */
+ return pkey_GOST_ECcp_decrypt(pctx, key, key_len, in, in_len);
+ case NID_kuznyechik_ctr:
+ case NID_magma_ctr:
+ return pkey_gost2018_decrypt(pctx, key, key_len, in, in_len);
+ default:
+ GOSTerr(GOST_F_PKEY_GOST_DECRYPT, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+}
+/* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */