Rust
How to use the Biscuit Rust crate
The Rust version of Biscuit can be found on Github, crates.io and on docs.rs.
Install
In Cargo.toml
:
biscuit-auth = "2.1"
Create a root key
use biscuit_auth::KeyPair;
let root_keypair = KeyPair::new();
Create a token
use biscuit_auth::{Biscuit, KeyPair, error};
fn create_token(root: &KeyPair) -> Result<Biscuit, error::Token> {
let mut builder = Biscuit::builder(root);
builder.add_authority_fact(r#"user("1234")"#)?;
builder.add_authority_check_(r#"check if operation("read");"#)?;
builder.build()
}
Create an authorizer
use biscuit_auth::{Biscuit, error, builder::Fact};
fn authorize(token: &Biscuit) -> Result<(), error::Token> {
let mut authorizer = token.authorizer()?;
// add a time($date) fact with the current date
authorizer.set_time()?;
// facts can be created directly from a string generated with `format!()`
// but this way is safer if you create facts from user data,because it
// prevents injections
let mut operation: Fact = "operation($op)".try_into()?;
operation.set("op", "read")?;
authorizer.add_fact(operation)?;
authorizer.allow()?;
authorizer.authorize()?;
Ok(())
}
Attenuate a token
use biscuit_auth::{Biscuit, error, builder::Check};
use std::time::{Duration, SystemTime};
fn attenuate(token: &Biscuit) -> Result<Biscuit, error::Token> {
let mut builder = token.create_block();
builder.add_check("check if time($time), $time < $ttl")?;
builder.set("ttl", System::now() + Duration::from_secs(60))?;
token.append(builder)
}
Seal a token
let sealed_token = token.seal()?;
Reject revoked tokens
The Biscuit::revocation_identifiers
method returns the list of revocation identifiers as byte arrays.
let identifiers: Vec<Vec<u8>> = token.revocation_identifiers();
Query data from the authorizer
The Authorizer::query
method takes a rule as argument and extract the data from generated facts as tuples.
let res: Vec<(String, i64)> =
authorizer.query("data($name, $id) <- user($name, $id)").unwrap();