# LDAP client library

A pure-Rust LDAP client library using the Tokio stack.

### Version notices

The 0.11 branch has had a belated but important dependency
upgrade: the `nom` parser combinator crate, both in the `lber` support library
and `ldap3` proper. This should be an implementation detail invisible to the user,
and the parsers have a battery of tests, but the version was nevertheless bumped up
out of abundance of caution. There are no functional differences between 0.10.6
and 0.11.3.

Starting with 0.10.3, there is cross-platform Kerberos/GSSAPI support if compiled
with the __gssapi__ feature. This feature enables the use of integrated Windows
authentication in Active Directory domains. See the description of the feature
in this README for the details of compile-time requirements.

The 0.11 branch is actively developed. Bug fixes will be ported to 0.10.x. The 0.9
branch is hence retired.

### Documentation

API reference:

- [Version 0.11.x](https://docs.rs/ldap3/0.11.3/ldap3/)

- [Version 0.10.x](https://docs.rs/ldap3/0.10.6/ldap3/)

There is an [LDAP introduction](https://github.com/inejge/ldap3/blob/27a247c8a6e4e2c86f664f4280c4c6499f0e9fe5/LDAP-primer.md)
for those still getting their bearings in the LDAP world.

### Miscellaneous notes

The library is client-only. One cannot make an LDAP server or a proxy with it.
It supports only version 3 of the protocol over connection-oriented transports.

There is no built-in support for connection pooling, automatic fallback or
reconnections.

## Usage

Add this to your `Cargo.toml`:

```toml
[dependencies.ldap3]
version = "0.11.3"
```

The library can be used either synchronously or asynchronously. The aim is to
offer essentially the same call interface for both flavors, with the necessary
differences in interaction and return values according to the nature of I/O.

## Examples

The following two examples perform exactly the same operation and should produce identical
results. They should be run against the example server in the `data` subdirectory of the crate source.
Other sample programs expecting the same server setup can be found in the `examples` subdirectory.

### Synchronous search

```rust
use ldap3::{LdapConn, Scope, SearchEntry};
use ldap3::result::Result;

fn main() -> Result<()> {
    let mut ldap = LdapConn::new("ldap://localhost:2389")?;
    let (rs, _res) = ldap.search(
        "ou=Places,dc=example,dc=org",
        Scope::Subtree,
        "(&(objectClass=locality)(l=ma*))",
        vec!["l"]
    )?.success()?;
    for entry in rs {
        println!("{:?}", SearchEntry::construct(entry));
    }
    Ok(ldap.unbind()?)
}
```

### Asynchronous search

```rust
use ldap3::{LdapConnAsync, Scope, SearchEntry};
use ldap3::result::Result;

#[tokio::main]
async fn main() -> Result<()> {
    let (conn, mut ldap) = LdapConnAsync::new("ldap://localhost:2389").await?;
    ldap3::drive!(conn);
    let (rs, _res) = ldap.search(
        "ou=Places,dc=example,dc=org",
        Scope::Subtree,
        "(&(objectClass=locality)(l=ma*))",
        vec!["l"]
    ).await?.success()?;
    for entry in rs {
        println!("{:?}", SearchEntry::construct(entry));
    }
    Ok(ldap.unbind().await?)
}
```

## Compile-time features

The following features are available at compile time:

* __sync__ (enabled by default): Synchronous API support.

* __gssapi__ (disabled by default): Kerberos/GSSAPI support. On Windows, system support
  crates and SDK libraries are used. Elsewhere, the feature needs Clang and its development
  libraries (for `bindgen`), as well as the Kerberos development libraries. On Debian/Ubuntu,
  that means `clang-N`, `libclang-N-dev` and `libkrb5-dev`. It should be clear from these
  requirements that GSSAPI support uses FFI to C libraries; you should consider the security
  implications of this fact.

  For usage notes and caveats, see the documentation for `Ldap::sasl_gssapi_bind()` in
  the API reference.

* __tls__ (enabled by default): TLS support, backed by the `native-tls` crate, which uses
  a platform-specific TLS backend. This is an alias for __tls-native__.

* __tls-rustls__ (disabled by default): TLS support, backed by the Rustls library.

Without any features, only plain TCP connections (and Unix domain sockets on Unix-like
platforms) are available. For TLS support, __tls__ and __tls-rustls__ are mutually
exclusive: choosing both will produce a compile-time error.

## License

Licensed under either of:

 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE)), or
 * MIT license ([LICENSE-MIT](LICENSE-MIT))

at your option.