| 1 | //! Access tokens, and a workspace's rules for the personal tokens that |
| 2 | //! reach it: the identity methods for both. |
| 3 | //! |
| 4 | //! There is one kind of access token. It belongs to a person (and acts as |
| 5 | //! them) or to a workspace (and acts as it), and it has: |
| 6 | //! |
| 7 | //! - **permissions**: a level for each resource, such as issues: write or |
| 8 | //! repositories: read ([`crate::scopes::resolve_permissions`]). They are |
| 9 | //! stored as scopes, the highest of each resource, and every check (the |
| 10 | //! API, the MCP server, git, the registries) reads those scopes. |
| 11 | //! - **a reach**: a person's token reaches every workspace they belong to, |
| 12 | //! or one workspace they choose, and in it all of its repositories, the |
| 13 | //! ones chosen, or none of the private ones. With no workspace and no |
| 14 | //! repositories it reaches its owner's account and public repositories |
| 15 | //! only. A workspace's token reaches its own workspace: all of its |
| 16 | //! repositories or the ones chosen. |
| 17 | //! - **an expiry**: up to [`MAX_LIFETIME_DAYS`] days, or none where the |
| 18 | //! workspaces it reaches allow that. |
| 19 | //! |
| 20 | //! A workspace's owners decide whether tokens made for every workspace of |
| 21 | //! their owner reach it, whether tokens made for it alone do, whether those |
| 22 | //! wait for their approval, and how long a token reaching it may last; they |
| 23 | //! see every member's token that reaches it, and can revoke one there. |
| 24 | //! |
| 25 | //! Each `*Args` struct is the argument of the identity method of the same |
| 26 | //! name, served at `POST /rpc/<method>`. |
| 27 | |
| 28 | use std::collections::BTreeMap; |
| 29 | |
| 30 | use serde::{Deserialize, Serialize}; |
| 31 | |
| 32 | use crate::identity::AccessToken; |
| 33 | use crate::scopes::RepositorySelection; |
| 34 | use crate::{User, Viewer}; |
| 35 | |
| 36 | /// The longest a token with an expiry may last, in days. |
| 37 | pub const MAX_LIFETIME_DAYS: u32 = 366; |
| 38 | |
| 39 | /// The most repositories a token may select. |
| 40 | pub const MAX_SELECTED_REPOSITORIES: usize = 50; |
| 41 | |
| 42 | /// Whether a token made for one workspace may be used there. |
| 43 | #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Serialize, Deserialize)] |
| 44 | #[serde(rename_all = "snake_case")] |
| 45 | pub enum TokenStatus { |
| 46 | #[default] |
| 47 | Active, |
| 48 | /// Waiting for an owner of the workspace to approve it. Until then it |
| 49 | /// reads public repositories only. |
| 50 | Pending, |
| 51 | /// An owner turned it down. |
| 52 | Denied, |
| 53 | /// An owner took it out of the workspace. |
| 54 | Revoked, |
| 55 | } |
| 56 | |
| 57 | impl TokenStatus { |
| 58 | pub fn as_str(self) -> &'static str { |
| 59 | match self { |
| 60 | TokenStatus::Active => "active", |
| 61 | TokenStatus::Pending => "pending", |
| 62 | TokenStatus::Denied => "denied", |
| 63 | TokenStatus::Revoked => "revoked", |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | pub fn parse(text: &str) -> TokenStatus { |
| 68 | match text { |
| 69 | "pending" => TokenStatus::Pending, |
| 70 | "denied" => TokenStatus::Denied, |
| 71 | "revoked" => TokenStatus::Revoked, |
| 72 | _ => TokenStatus::Active, |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /// `create_token`: a person makes an access token, for themselves or, as |
| 78 | /// an owner, for a workspace. People only, signed in (not with a token), |
| 79 | /// with a confirmed address. Returns `Outcome<CreatedAccessToken>`; a |
| 80 | /// personal token made for a workspace that asks for approval starts |
| 81 | /// pending unless its owner is an owner there. |
| 82 | #[derive(Debug, Default, Serialize, Deserialize)] |
| 83 | pub struct CreateTokenArgs { |
| 84 | pub actor: User, |
| 85 | /// Who it belongs to: null for the actor, or the slug of a workspace |
| 86 | /// the actor owns, whose token it then is. |
| 87 | #[serde(default)] |
| 88 | pub owner: Option<String>, |
| 89 | pub name: String, |
| 90 | #[serde(default)] |
| 91 | pub description: Option<String>, |
| 92 | /// How long it lasts: 1 to [`MAX_LIFETIME_DAYS`] days; null for no |
| 93 | /// expiry, where the workspaces it reaches allow that. |
| 94 | #[serde(default)] |
| 95 | pub ttl_seconds: Option<u64>, |
| 96 | /// A personal token's reach: null for every workspace its owner |
| 97 | /// belongs to, or the slug of one. Ignored for a workspace's token, |
| 98 | /// which reaches its own workspace. |
| 99 | #[serde(default)] |
| 100 | pub workspace: Option<String>, |
| 101 | /// Which repositories of that workspace: all, the selected ones, or |
| 102 | /// public ones only. With no workspace, `public` makes a token for its |
| 103 | /// owner's account and public repositories only; `selected` needs one. |
| 104 | #[serde(default)] |
| 105 | pub repository_selection: RepositorySelection, |
| 106 | /// With `selected`: the repositories, as `owner/name` or a name in the |
| 107 | /// workspace. At most [`MAX_SELECTED_REPOSITORIES`]. |
| 108 | #[serde(default)] |
| 109 | pub repositories: Vec<String>, |
| 110 | /// Each resource's level by name, such as `{"issues": "write"}`; left |
| 111 | /// out or `none` is no access. See [`crate::scopes::resolve_permissions`]. |
| 112 | #[serde(default)] |
| 113 | pub permissions: BTreeMap<String, String>, |
| 114 | } |
| 115 | |
| 116 | /// `update_token`: a person changes a token of theirs, or, as an owner, |
| 117 | /// a workspace's token: its name, description, repositories or |
| 118 | /// permissions. What is left out stays; the token itself, its reach's |
| 119 | /// workspace and its expiry do not change. A personal token made for a |
| 120 | /// workspace that asks for approval waits for it again when its |
| 121 | /// repositories or permissions change, unless its owner is an owner there. |
| 122 | /// Returns `Outcome<AccessToken>`. |
| 123 | #[derive(Debug, Default, Serialize, Deserialize)] |
| 124 | pub struct UpdateTokenArgs { |
| 125 | pub actor: User, |
| 126 | pub id: String, |
| 127 | /// The workspace whose token it is; null for one of the actor's own. |
| 128 | #[serde(default)] |
| 129 | pub owner: Option<String>, |
| 130 | #[serde(default)] |
| 131 | pub name: Option<String>, |
| 132 | #[serde(default)] |
| 133 | pub description: Option<String>, |
| 134 | #[serde(default)] |
| 135 | pub repository_selection: Option<RepositorySelection>, |
| 136 | #[serde(default)] |
| 137 | pub repositories: Option<Vec<String>>, |
| 138 | #[serde(default)] |
| 139 | pub permissions: Option<BTreeMap<String, String>>, |
| 140 | } |
| 141 | |
| 142 | /// A workspace's rules for personal access tokens. |
| 143 | #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 144 | #[serde(rename_all = "camelCase")] |
| 145 | pub struct TokenPolicy { |
| 146 | /// Whether a token made for every workspace of its owner reaches this |
| 147 | /// one. Off: it still works everywhere else. |
| 148 | pub allow_tokens_for_all_workspaces: bool, |
| 149 | /// Whether a token may be made for this workspace alone. |
| 150 | pub allow_tokens_for_this_workspace: bool, |
| 151 | /// Whether a token made for this workspace alone waits for an owner's |
| 152 | /// approval. Owners' own tokens never wait. |
| 153 | pub require_approval: bool, |
| 154 | /// The longest a token reaching it may last, in days. Null: no limit |
| 155 | /// (a token with an expiry still lasts at most 366 days). |
| 156 | pub max_lifetime_days: Option<u32>, |
| 157 | /// Whether a token that never expires is kept out. |
| 158 | pub forbid_no_expiry: bool, |
| 159 | /// Who changed it last, and when; null for the defaults. |
| 160 | #[serde(default)] |
| 161 | pub updated_by: Option<String>, |
| 162 | #[serde(default)] |
| 163 | pub updated_at: Option<String>, |
| 164 | } |
| 165 | |
| 166 | impl Default for TokenPolicy { |
| 167 | /// What a workspace has until an owner changes it. |
| 168 | fn default() -> Self { |
| 169 | TokenPolicy { |
| 170 | allow_tokens_for_all_workspaces: true, |
| 171 | allow_tokens_for_this_workspace: true, |
| 172 | require_approval: true, |
| 173 | max_lifetime_days: None, |
| 174 | forbid_no_expiry: false, |
| 175 | updated_by: None, |
| 176 | updated_at: None, |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | impl TokenPolicy { |
| 182 | /// Whether a token made at `created_ms` that expires at `expires_ms` |
| 183 | /// (none: never) lasts no longer than the policy allows. |
| 184 | pub fn lifetime_allowed(&self, created_ms: u64, expires_ms: Option<u64>) -> bool { |
| 185 | match (expires_ms, self.max_lifetime_days) { |
| 186 | (None, _) if self.forbid_no_expiry => false, |
| 187 | (None, Some(_)) => false, |
| 188 | (None, None) => true, |
| 189 | (Some(_), None) => true, |
| 190 | // A day's grace, for clocks and for "30 days" picked at 23:59. |
| 191 | (Some(expires), Some(days)) => expires.saturating_sub(created_ms) <= (u64::from(days) + 1) * 86_400_000, |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | /// Why a token that lasts `ttl_seconds` (none: forever) cannot be made |
| 196 | /// to reach the workspace `slug`, if it cannot. `this_workspace` is |
| 197 | /// whether it is made for that workspace alone, rather than for every |
| 198 | /// workspace of its owner. |
| 199 | pub fn refusal(&self, slug: &str, this_workspace: bool, ttl_seconds: Option<u64>) -> Option<String> { |
| 200 | if this_workspace && !self.allow_tokens_for_this_workspace { |
| 201 | return Some(format!("{slug} does not allow personal access tokens made for it.")); |
| 202 | } |
| 203 | if !this_workspace && !self.allow_tokens_for_all_workspaces { |
| 204 | return Some(format!("{slug} does not allow tokens made for all of a member's workspaces: make one for {slug} alone.")); |
| 205 | } |
| 206 | if !self.lifetime_allowed(0, ttl_seconds.map(|ttl| ttl * 1000)) { |
| 207 | return Some(match self.max_lifetime_days { |
| 208 | Some(days) => format!("{slug} allows tokens that last at most {days} days."), |
| 209 | None => format!("{slug} does not allow tokens that never expire."), |
| 210 | }); |
| 211 | } |
| 212 | None |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | /// `get_token_policy`: a workspace's rules. Members may read them, so the |
| 217 | /// token form can say what a workspace allows. Returns |
| 218 | /// `Outcome<TokenPolicy>`. |
| 219 | #[derive(Debug, Serialize, Deserialize)] |
| 220 | pub struct GetTokenPolicyArgs { |
| 221 | pub viewer: Viewer, |
| 222 | pub slug: String, |
| 223 | } |
| 224 | |
| 225 | /// `set_token_policy`: an owner, as a person, changes the rules. What is |
| 226 | /// left out stays. Returns `Outcome<TokenPolicy>`. |
| 227 | #[derive(Debug, Default, Serialize, Deserialize)] |
| 228 | pub struct SetTokenPolicyArgs { |
| 229 | pub actor: User, |
| 230 | pub slug: String, |
| 231 | #[serde(default)] |
| 232 | pub allow_tokens_for_all_workspaces: Option<bool>, |
| 233 | #[serde(default)] |
| 234 | pub allow_tokens_for_this_workspace: Option<bool>, |
| 235 | #[serde(default)] |
| 236 | pub require_approval: Option<bool>, |
| 237 | /// Zero clears the limit. |
| 238 | #[serde(default)] |
| 239 | pub max_lifetime_days: Option<u32>, |
| 240 | #[serde(default)] |
| 241 | pub forbid_no_expiry: Option<bool>, |
| 242 | #[serde(default)] |
| 243 | pub surface: Option<crate::audit::Surface>, |
| 244 | } |
| 245 | |
| 246 | /// A member's personal token that reaches a workspace, as its owners see |
| 247 | /// it: never the token itself. |
| 248 | #[derive(Clone, Debug, Serialize, Deserialize)] |
| 249 | #[serde(rename_all = "camelCase")] |
| 250 | pub struct MemberToken { |
| 251 | /// The person it belongs to. |
| 252 | pub owner: String, |
| 253 | pub token: AccessToken, |
| 254 | /// Whether it reaches the workspace now: active, allowed by the |
| 255 | /// policy, and not revoked here. |
| 256 | pub reaches: bool, |
| 257 | /// Why not, when it does not. |
| 258 | #[serde(default)] |
| 259 | pub blocked_by: Option<String>, |
| 260 | } |
| 261 | |
| 262 | /// `list_member_tokens`: owners only. The personal tokens of the |
| 263 | /// workspace's members and outside collaborators that could reach it: |
| 264 | /// those made for it alone (`status` to narrow them), and those made for |
| 265 | /// every workspace of their owner. Returns `Outcome<Vec<MemberToken>>`. |
| 266 | #[derive(Debug, Serialize, Deserialize)] |
| 267 | pub struct ListMemberTokensArgs { |
| 268 | pub actor: User, |
| 269 | pub slug: String, |
| 270 | /// `pending` for approval requests only. |
| 271 | #[serde(default)] |
| 272 | pub status: Option<TokenStatus>, |
| 273 | } |
| 274 | |
| 275 | /// `review_token_request`: an owner approves or denies a token waiting |
| 276 | /// for approval. Its owner is told. Returns `Outcome<MemberToken>`. |
| 277 | #[derive(Debug, Serialize, Deserialize)] |
| 278 | pub struct ReviewTokenRequestArgs { |
| 279 | pub actor: User, |
| 280 | pub slug: String, |
| 281 | pub id: String, |
| 282 | pub approve: bool, |
| 283 | #[serde(default)] |
| 284 | pub reason: Option<String>, |
| 285 | #[serde(default)] |
| 286 | pub surface: Option<crate::audit::Surface>, |
| 287 | } |
| 288 | |
| 289 | /// `revoke_member_token`: an owner takes a member's token out of the |
| 290 | /// workspace. A token made for it alone stops working; one made for every |
| 291 | /// workspace of its owner keeps working everywhere else. Returns |
| 292 | /// `Outcome<bool>`. |
| 293 | #[derive(Debug, Serialize, Deserialize)] |
| 294 | pub struct RevokeMemberTokenArgs { |
| 295 | pub actor: User, |
| 296 | pub slug: String, |
| 297 | pub id: String, |
| 298 | #[serde(default)] |
| 299 | pub reason: Option<String>, |
| 300 | #[serde(default)] |
| 301 | pub surface: Option<crate::audit::Surface>, |
| 302 | } |
| 303 | |
| 304 | #[cfg(test)] |
| 305 | mod tests { |
| 306 | use super::*; |
| 307 | |
| 308 | #[test] |
| 309 | fn lifetimes_are_checked_against_the_policy() { |
| 310 | let day = 86_400_000; |
| 311 | let open = TokenPolicy::default(); |
| 312 | assert!(open.lifetime_allowed(0, None)); |
| 313 | assert!(open.lifetime_allowed(0, Some(900 * day))); |
| 314 | let capped = TokenPolicy { max_lifetime_days: Some(90), ..TokenPolicy::default() }; |
| 315 | assert!(capped.lifetime_allowed(0, Some(90 * day))); |
| 316 | assert!(capped.lifetime_allowed(0, Some(90 * day + day / 2)), "a day's grace"); |
| 317 | assert!(!capped.lifetime_allowed(0, Some(92 * day))); |
| 318 | assert!(!capped.lifetime_allowed(0, None), "a limit keeps out tokens that never expire"); |
| 319 | let no_forever = TokenPolicy { forbid_no_expiry: true, ..TokenPolicy::default() }; |
| 320 | assert!(!no_forever.lifetime_allowed(0, None)); |
| 321 | assert!(no_forever.lifetime_allowed(0, Some(900 * day))); |
| 322 | } |
| 323 | |
| 324 | #[test] |
| 325 | fn refusals_name_the_rule() { |
| 326 | let closed = TokenPolicy { allow_tokens_for_all_workspaces: false, allow_tokens_for_this_workspace: false, ..TokenPolicy::default() }; |
| 327 | assert!(closed.refusal("acme", true, Some(60)).unwrap().contains("made for it")); |
| 328 | assert!(closed.refusal("acme", false, Some(60)).unwrap().contains("all of a member's workspaces")); |
| 329 | let capped = TokenPolicy { max_lifetime_days: Some(30), ..TokenPolicy::default() }; |
| 330 | assert!(capped.refusal("acme", true, Some(31 * 86_400 + 86_400)).unwrap().contains("30 days")); |
| 331 | assert_eq!(capped.refusal("acme", true, Some(7 * 86_400)), None); |
| 332 | assert!(TokenPolicy::default().require_approval, "tokens made for a workspace wait for approval unless an owner says otherwise"); |
| 333 | } |
| 334 | |
| 335 | #[test] |
| 336 | fn statuses_read_as_words() { |
| 337 | for status in [TokenStatus::Active, TokenStatus::Pending, TokenStatus::Denied, TokenStatus::Revoked] { |
| 338 | assert_eq!(TokenStatus::parse(status.as_str()), status); |
| 339 | assert_eq!(serde_json::to_value(status).unwrap(), status.as_str()); |
| 340 | } |
| 341 | } |
| 342 | } |