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invalid peer certificate: UnsupportedCertVersion #327
Description
I'm getting this error running the example code
Error: An error occured during the attempt of performing I/O: invalid peer certificate contents: invalid peer certificate: UnsupportedCertVersion
Cargo.toml
tiberius = { version = "0.12.2", default-features = false, features = [ "rustls" ] }
once_cell = { version = "1.19" }
anyhow = { version = "1.0" }
tokio-util = { version = "0.7", features = [ "compat" ] }
tokio = { version = "1.35", features = ["full"] }Code
use once_cell::sync::Lazy;
use std::env;
use tiberius::{Client, Config};
use tokio::net::TcpStream;
use tokio_util::compat::TokioAsyncWriteCompatExt;
static CONN_STR: Lazy<String> = Lazy::new(|| {
env::var("TIBERIUS_TEST_CONNECTION_STRING").unwrap_or_else(|_| {
"Server=localhost;Database=
<my_db>;User ID=<my_user_id>;Password=<my_known_password>;Trusted_Connection=False;Encrypt=False;MultipleActiveResultSets=True;".to_owned()
})
});
#[cfg(not(all(windows, feature = "sql-browser-tokio")))]
#[tokio::main]
async fn main() -> anyhow::Result<()> {
let config = Config::from_ado_string(&CONN_STR)?;
let tcp = TcpStream::connect(config.get_addr()).await?;
tcp.set_nodelay(true)?;
let mut client = Client::connect(config, tcp.compat_write()).await?;
let stream = client.query("SELECT TOP 10 * FROM [Accounting].[Account]", &[&1i32]).await?;
let row = stream.into_row().await?.unwrap();
println!("{:?}", row);
assert_eq!(Some(1), row.get(0));
Ok(())
}Note that the connection string works locally from ssms or azure data studio
Activity
feat(tls): clearer diagnostics for rustls cert-version handshake fail…
feat(tls): clearer diagnostics for rustls cert-version handshake fail…
MattJackson commentedon Sep 24, 2026
Fixed in #451, shipped in v0.13.0 (https://github.com/tiberius-rs/tiberius/releases/tag/v0.13.0). Closing.