Rust
The Rust version of Biscuit can be found on Github, crates.io and on docs.rs.
Install
In Cargo.toml
:
biscuit-auth = "3.1"
Create a root key
#![allow(unused)] fn main() { use biscuit_auth::KeyPair; let root_keypair = KeyPair::new(); }
Create a token
#![allow(unused)] fn main() { use biscuit_auth::{error, macros::*, Biscuit, KeyPair}; fn create_token(root: &KeyPair) -> Result<Biscuit, error::Token> { let user_id = "1234"; // the authority block can be built from a datalog snippet // the snippet is parsed at compile-time, efficient building // code is generated let mut authority = biscuit!( r#" // parameters can directly reference in-scope variables user({user_id}); // parameters can be manually supplied as well right({user_id}, "file1", {operation}); "#, operation = "read", ); // it is possible to modify a builder by adding a datalog snippet biscuit_merge!( &mut authority, r#"check if operation("read");"# ); authority.build(&root) } }
Create an authorizer
#![allow(unused)] fn main() { use biscuit_auth::{builder_ext::AuthorizerExt, error, macros::*, Biscuit}; fn authorize(token: &Biscuit) -> Result<(), error::Token> { let operation = "read"; // same as the `biscuit!` macro. There is also a `authorizer_merge!` // macro for dynamic authorizer construction let mut authorizer = authorizer!( r#"operation({operation});"# ); // register a fact containing the current time for TTL checks authorizer.set_time(); // add a `allow if true;` policy // meaning that we are relying entirely on checks carried in the token itself authorizer.add_allow_all(); // link the token to the authorizer authorizer.add_token(token)?; authorizer.authorize()?; Ok(()) } }
Attenuate a token
#![allow(unused)] fn main() { use biscuit_auth::{builder_ext::BuilderExt, error, macros::*, Biscuit}; use std::time::{Duration, SystemTime}; fn attenuate(token: &Biscuit) -> Result<Biscuit, error::Token> { let res = "file1"; // same as `biscuit!` and `authorizer!`, a `block_merge!` macro is available let mut builder = block!(r#"check if resource({res});"#); builder.check_expiration_date(SystemTime::now() + Duration::from_secs(60)); token.append(builder) } }
Seal a token
#![allow(unused)] fn main() { let sealed_token = token.seal()?; }
Reject revoked tokens
The Biscuit::revocation_identifiers
method returns the list of revocation identifiers as byte arrays.
Don't forget to parse them from a textual representation (for instance
hexadecimal) if you store them as text values.
#![allow(unused)] fn main() { 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.
#![allow(unused)] fn main() { let res: Vec<(String, i64)> = authorizer.query("data($name, $id) <- user($name, $id)").unwrap(); }