junobuild-auth 0.4.1

Authentication toolkit for Juno.
Documentation 
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use crate::delegation::types::{
    Delegation, GetDelegationError, GetDelegationResult, SessionKey, SignedDelegation, Timestamp,
};
use crate::delegation::utils::seed::calculate_seed;
use crate::delegation::utils::signature::{build_signature_inputs, build_signature_msg};
use crate::delegation::utils::targets::build_targets;
use crate::openid::credentials::delegation::types::interface::{
    OpenIdDelegationCredential, OpenIdDelegationCredentialKey,
};
use crate::openid::types::provider::OpenIdDelegationProvider;
use crate::state::get_salt;
use crate::state::services::read_state;
use crate::strategies::{AuthCertificateStrategy, AuthHeapStrategy};
use serde_bytes::ByteBuf;

pub fn openid_get_delegation(
    session_key: &SessionKey,
    expiration: Timestamp,
    credential: &OpenIdDelegationCredential,
    provider: &OpenIdDelegationProvider,
    auth_heap: &impl AuthHeapStrategy,
    certificate: &impl AuthCertificateStrategy,
) -> GetDelegationResult {
    get_delegation(
        session_key,
        expiration,
        &OpenIdDelegationCredentialKey::from(credential),
        provider,
        auth_heap,
        certificate,
    )
}

pub fn get_delegation(
    session_key: &SessionKey,
    expiration: Timestamp,
    key: &OpenIdDelegationCredentialKey,
    provider: &OpenIdDelegationProvider,
    auth_heap: &impl AuthHeapStrategy,
    certificate: &impl AuthCertificateStrategy,
) -> GetDelegationResult {
    let seed =
        calculate_seed(key, &get_salt(auth_heap)).map_err(GetDelegationError::DeriveSeedFailed)?;

    let targets = build_targets(provider, auth_heap);

    let message = build_signature_msg(session_key, expiration, &targets);

    let inputs = build_signature_inputs(seed.as_ref(), &message);

    let certified_assets_root_hash = certificate.get_asset_hashes_root_hash();

    read_state(|state| {
        match state
            .runtime
            .sigs
            .get_signature_as_cbor(&inputs, Some(certified_assets_root_hash))
        {
            Ok(signature) => Ok(SignedDelegation {
                delegation: Delegation {
                    pubkey: session_key.clone(),
                    expiration,
                    targets,
                },
                signature: ByteBuf::from(signature),
            }),
            Err(_) => Err(GetDelegationError::NoSuchDelegation),
        }
    })
}