| 1 | //! SSH public keys: parsing, registration, and lookup for git-over-SSH |
| 2 | //! authentication. |
| 3 | |
| 4 | use ssh_key::{ |
| 5 | HashAlg, |
| 6 | PublicKey, |
| 7 | }; |
| 8 | |
| 9 | use crate::error::{ |
| 10 | Error, |
| 11 | Result, |
| 12 | }; |
| 13 | use crate::models::SshKey; |
| 14 | |
| 15 | /// Parse an OpenSSH public-key line (`ssh-ed25519 AAAA… comment`) into its |
| 16 | /// canonical SHA256 fingerprint and normalized key line, for registration. |
| 17 | pub fn parse_public_key(openssh: &str) -> Result<(String, String)> { |
| 18 | let key = PublicKey::from_openssh(openssh.trim()) |
| 19 | .map_err(|e| Error::Invalid(format!("invalid ssh public key: {e}")))?; |
| 20 | let fingerprint = key.fingerprint(HashAlg::Sha256).to_string(); |
| 21 | let normalized = key |
| 22 | .to_openssh() |
| 23 | .map_err(|e| Error::Invalid(format!("encoding ssh public key: {e}")))?; |
| 24 | Ok((fingerprint, normalized)) |
| 25 | } |
| 26 | |
| 27 | /// Register an SSH public key for a user. |
| 28 | /// |
| 29 | /// `fingerprint` must be the canonical SHA256 fingerprint and `content` the |
| 30 | /// normalized OpenSSH key line. Returns [`Error::AlreadyExists`] if the |
| 31 | /// fingerprint is already registered. |
| 32 | pub async fn add( |
| 33 | db: &toasty::Db, |
| 34 | user_id: i64, |
| 35 | title: &str, |
| 36 | fingerprint: &str, |
| 37 | content: &str, |
| 38 | ) -> Result<SshKey> { |
| 39 | if find_by_fingerprint(db, fingerprint).await?.is_some() { |
| 40 | return Err(Error::AlreadyExists(format!("ssh key {fingerprint}"))); |
| 41 | } |
| 42 | let mut db = db.clone(); |
| 43 | let key = toasty::create!(SshKey { |
| 44 | user_id: user_id, |
| 45 | title: title, |
| 46 | fingerprint: fingerprint, |
| 47 | content: content, |
| 48 | created_at: crate::now(), |
| 49 | }) |
| 50 | .exec(&mut db) |
| 51 | .await?; |
| 52 | Ok(key) |
| 53 | } |
| 54 | |
| 55 | /// Look up a key by its fingerprint. |
| 56 | pub async fn find_by_fingerprint(db: &toasty::Db, fingerprint: &str) -> Result<Option<SshKey>> { |
| 57 | let mut db = db.clone(); |
| 58 | let key = SshKey::filter(SshKey::fields().fingerprint().eq(fingerprint)) |
| 59 | .first() |
| 60 | .exec(&mut db) |
| 61 | .await?; |
| 62 | Ok(key) |
| 63 | } |
| 64 | |
| 65 | /// Find the user id that owns the key with this fingerprint, if any. |
| 66 | pub async fn find_user_id_by_fingerprint( |
| 67 | db: &toasty::Db, |
| 68 | fingerprint: &str, |
| 69 | ) -> Result<Option<i64>> { |
| 70 | Ok(find_by_fingerprint(db, fingerprint) |
| 71 | .await? |
| 72 | .map(|k| k.user_id)) |
| 73 | } |
| 74 | |
| 75 | /// Delete one of `user_id`'s keys by id. No-op if the key is missing or owned |
| 76 | /// by someone else. |
| 77 | pub async fn delete(db: &toasty::Db, id: i64, user_id: i64) -> Result<()> { |
| 78 | let mut conn = db.clone(); |
| 79 | if let Some(key) = SshKey::filter(SshKey::fields().id().eq(id)) |
| 80 | .first() |
| 81 | .exec(&mut conn) |
| 82 | .await? |
| 83 | && key.user_id == user_id |
| 84 | { |
| 85 | let mut conn = db.clone(); |
| 86 | key.delete().exec(&mut conn).await?; |
| 87 | } |
| 88 | Ok(()) |
| 89 | } |
| 90 | |
| 91 | /// List a user's registered SSH keys. |
| 92 | pub async fn list_by_user(db: &toasty::Db, user_id: i64) -> Result<Vec<SshKey>> { |
| 93 | let mut db = db.clone(); |
| 94 | let keys = SshKey::filter(SshKey::fields().user_id().eq(user_id)) |
| 95 | .exec(&mut db) |
| 96 | .await?; |
| 97 | Ok(keys) |
| 98 | } |