X509V3_CTX_REPLACE
NULL, X509V3_CTX_REPLACE);
X509V3_set_ctx(&ext_ctx, NULL, NULL, csr, NULL, X509V3_CTX_REPLACE);
new_x509, NULL, NULL, X509V3_CTX_REPLACE);
X509V3_set_ctx(&ext_ctx, NULL, NULL, req, NULL, X509V3_CTX_REPLACE);
X509V3_set_ctx(&ext_ctx, issuer_cert, x, NULL, NULL, X509V3_CTX_REPLACE);
if (ctx->flags == X509V3_CTX_REPLACE)