OpenSSL::X509::Revoked#to_der

static VALUE
ossl_x509revoked_to_der(VALUE self)
{
    X509_REVOKED *rev;
    VALUE str;
    int len;
    unsigned char *p;

    GetX509Rev(self, rev);
    len = i2d_X509_REVOKED(rev, NULL);
    if (len <= 0)
        ossl_raise(eX509RevError, "i2d_X509_REVOKED");
    str = rb_str_new(NULL, len);
    p = (unsigned char *)RSTRING_PTR(str);
    if (i2d_X509_REVOKED(rev, &p) <= 0)
        ossl_raise(eX509RevError, "i2d_X509_REVOKED");
    ossl_str_adjust(str, p);
    return str;
}