-static int gendh_cb(EVP_PKEY_CTX *ctx)
-{
- int p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
- BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
- static const char symbols[] = ".+*\n";
- char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
-
- BIO_write(b, &c, 1);
- (void)BIO_flush(b);
- return 1;
-}