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proxmox-backup
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api: datastore: refactor priv checks 

the helper now takes both high-privilege and lesser-privilege privs, so
the resulting bool can be used to quickly check whether additional
checks like group ownership are needed or not.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Fabian Grünbichler 2022-05-09 17:41:57 +02:00 committed by Thomas Lamprecht
parent a724f5fd47
commit 2bc2435a96
1 changed files with 97 additions and 80 deletions
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177
src/api2/admin/datastore.rs
View File

@ -88,20 +88,25 @@ fn get_ns_privs(store: &str, ns: &BackupNamespace, auth_id: &Authid) -> Result<u
})
}
// for asserting a base priv existence but also returning the privs for more fine grained checking
// locally
fn get_ns_privs_checked(
// asserts that either either `full_access_privs` or `partial_access_privs` are fulfilled,
// returning value indicates whether further checks like group ownerships are required
fn check_ns_privs(
store: &str,
ns: &BackupNamespace,
auth_id: &Authid,
required_privs: u64,
) -> Result<u64, Error> {
full_access_privs: u64,
partial_access_privs: u64,
) -> Result<bool, Error> {
let privs = get_ns_privs(store, ns, auth_id)?;
if privs & required_privs == 0 {
proxmox_router::http_bail!(FORBIDDEN, "permission check failed");
if full_access_privs != 0 && (privs & full_access_privs) != 0 {
return Ok(false);
}
Ok(privs)
if partial_access_privs != 0 && (privs & partial_access_privs) != 0 {
return Ok(true);
}
proxmox_router::http_bail!(FORBIDDEN, "permission check failed");
}
fn read_backup_index(
@ -184,15 +189,15 @@ pub fn list_groups(
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let list_all = !check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
let list_all = (user_privs & PRIV_DATASTORE_AUDIT) != 0;
datastore
.iter_backup_groups(backup_ns.clone())? // FIXME: Namespaces and recursion parameters!
@ -279,16 +284,17 @@ pub fn delete_group(
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_PRUNE,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_PRUNE,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -333,16 +339,17 @@ pub fn list_snapshot_files(
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_READ,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & (PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_READ) == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -388,16 +395,17 @@ pub fn delete_snapshot(
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_PRUNE,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_PRUNE,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -449,15 +457,14 @@ pub fn list_snapshots(
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let list_all = !check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_BACKUP,
)?;
let list_all = (user_privs & PRIV_DATASTORE_AUDIT) != 0;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
// FIXME: filter also owner before collecting, for doing that nicely the owner should move into
@ -738,13 +745,13 @@ pub fn verify(
) -> Result<Value, Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_VERIFY | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_VERIFY,
PRIV_DATASTORE_BACKUP,
)?;
let owner_check_required = user_privs & PRIV_DATASTORE_VERIFY == 0;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
let ignore_verified = ignore_verified.unwrap_or(true);
@ -908,16 +915,17 @@ pub fn prune(
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_PRUNE,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_PRUNE,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1253,15 +1261,16 @@ pub fn download_file(
let store = required_string_param(&param, "store")?;
let backup_ns = optional_ns_param(&param)?;
let backup_dir: pbs_api_types::BackupDir = Deserialize::deserialize(&param)?;
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_READ,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_READ == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1336,15 +1345,16 @@ pub fn download_file_decoded(
let store = required_string_param(&param, "store")?;
let backup_ns = optional_ns_param(&param)?;
let backup_dir: pbs_api_types::BackupDir = Deserialize::deserialize(&param)?;
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_READ,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_READ == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1466,7 +1476,9 @@ pub fn upload_backup_log(
let store = required_string_param(&param, "store")?;
let backup_ns = optional_ns_param(&param)?;
let backup_dir: pbs_api_types::BackupDir = Deserialize::deserialize(&param)?;
get_ns_privs_checked(&store, &backup_ns, &auth_id, PRIV_DATASTORE_BACKUP)?;
check_ns_privs(&store, &backup_ns, &auth_id, PRIV_DATASTORE_BACKUP, 0)?;
let datastore = DataStore::lookup_datastore(store, Some(Operation::Write))?;
let backup_dir = datastore.backup_dir(backup_ns, backup_dir)?;
@ -1537,16 +1549,17 @@ pub fn catalog(
) -> Result<Vec<ArchiveEntry>, Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_READ,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_READ == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1621,15 +1634,16 @@ pub fn pxar_file_download(
let store = required_string_param(&param, "store")?;
let backup_ns = optional_ns_param(&param)?;
let backup_dir: pbs_api_types::BackupDir = Deserialize::deserialize(&param)?;
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_READ,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_READ == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1830,15 +1844,16 @@ pub fn get_group_notes(
) -> Result<String, Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_AUDIT == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1880,14 +1895,15 @@ pub fn set_group_notes(
) -> Result<(), Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1927,14 +1943,15 @@ pub fn get_notes(
) -> Result<String, Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_AUDIT == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -1981,14 +1998,15 @@ pub fn set_notes(
) -> Result<(), Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -2033,14 +2051,16 @@ pub fn get_protection(
) -> Result<bool, Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Read))?;
if user_privs & PRIV_DATASTORE_AUDIT == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -2083,14 +2103,15 @@ pub fn set_protection(
) -> Result<(), Error> {
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let user_privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_BACKUP,
)?;
let datastore = DataStore::lookup_datastore(&store, Some(Operation::Write))?;
if user_privs & PRIV_DATASTORE_MODIFY == 0 {
if owner_check_required {
let owner = datastore.get_owner(&backup_ns, &backup_dir.group)?;
check_backup_owner(&owner, &auth_id)?;
}
@ -2135,21 +2156,19 @@ pub fn set_backup_owner(
let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
let backup_ns = backup_ns.unwrap_or_default();
let privs = get_ns_privs_checked(
let owner_check_required = check_ns_privs(
&store,
&backup_ns,
&auth_id,
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_BACKUP,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_BACKUP,
)?;
let backup_group = datastore.backup_group(backup_ns, backup_group);
let allowed = if (privs & PRIV_DATASTORE_MODIFY) != 0 {
true // High-privilege user/token
} else if (privs & PRIV_DATASTORE_BACKUP) != 0 {
if owner_check_required {
let owner = backup_group.get_owner()?;
match (owner.is_token(), new_owner.is_token()) {
let allowed = match (owner.is_token(), new_owner.is_token()) {
(true, true) => {
// API token to API token, owned by same user
let owner = owner.user();
@ -2168,19 +2187,17 @@ pub fn set_backup_owner(
// User to User, not allowed for unprivileged users
false
}
}
} else {
false
};
};
if !allowed {
return Err(http_err!(
UNAUTHORIZED,
"{} does not have permission to change owner of backup group '{}' to {}",
auth_id,
backup_group,
new_owner,
));
if !allowed {
return Err(http_err!(
UNAUTHORIZED,
"{} does not have permission to change owner of backup group '{}' to {}",
auth_id,
backup_group,
new_owner,
));
}
}
let user_info = CachedUserInfo::new()?;