sk_X509_EXTENSION_value
ex = sk_X509_EXTENSION_value(exts, i);
ext = sk_X509_EXTENSION_value(exts, j);
ext = sk_X509_EXTENSION_value(exts, idx);
X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
existing = sk_X509_EXTENSION_value(*x509_exts, extidx);
ex = sk_X509_EXTENSION_value(exts, i);
prev_ext = sk_X509_EXTENSION_value(exts, 0);
curr_ext = sk_X509_EXTENSION_value(exts, i);
return sk_X509_EXTENSION_value(exts, loc);
ext = sk_X509_EXTENSION_value(exts, i);
X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);