/// <exception cref="System.IO.IOException"/>
private void TestRootReadableExecutableInternal(bool located)
{
// verify executable permission on root: cd /
//
NUnit.Framework.Assert.IsFalse("In root before cd", fsView.GetWorkingDirectory().
IsRoot());
fsView.SetWorkingDirectory(new Path("/"));
Assert.True("Not in root dir after cd", fsView.GetWorkingDirectory
().IsRoot());
// verify readable
//
VerifyRootChildren(ListStatusInternal(located, fsView.GetWorkingDirectory()));
// verify permissions
//
FileStatus rootStatus = fsView.GetFileStatus(fsView.GetWorkingDirectory());
FsPermission perms = rootStatus.GetPermission();
Assert.True("User-executable permission not set!", perms.GetUserAction
().Implies(FsAction.Execute));
Assert.True("User-readable permission not set!", perms.GetUserAction
().Implies(FsAction.Read));
Assert.True("Group-executable permission not set!", perms.GetGroupAction
().Implies(FsAction.Execute));
Assert.True("Group-readable permission not set!", perms.GetGroupAction
().Implies(FsAction.Read));
Assert.True("Other-executable permission not set!", perms.GetOtherAction
().Implies(FsAction.Execute));
Assert.True("Other-readable permission not set!", perms.GetOtherAction
().Implies(FsAction.Read));
}
/// <summary>Whether a cache pool can be accessed by the current context</summary>
/// <param name="pool">CachePool being accessed</param>
/// <param name="access">type of action being performed on the cache pool</param>
/// <exception cref="Org.Apache.Hadoop.Security.AccessControlException">if pool cannot be accessed
/// </exception>
public virtual void CheckPermission(CachePool pool, FsAction access)
{
FsPermission mode = pool.GetMode();
if (IsSuperUser())
{
return;
}
if (GetUser().Equals(pool.GetOwnerName()) && mode.GetUserAction().Implies(access))
{
return;
}
if (GetGroups().Contains(pool.GetGroupName()) && mode.GetGroupAction().Implies(access
))
{
return;
}
if (mode.GetOtherAction().Implies(access))
{
return;
}
throw new AccessControlException("Permission denied while accessing pool " + pool
.GetPoolName() + ": user " + GetUser() + " does not have " + access.ToString() +
" permissions.");
}
/// <summary>
/// Checks for a given path whether the Other permissions on it
/// imply the permission in the passed FsAction
/// </summary>
/// <param name="fs"/>
/// <param name="path"/>
/// <param name="action"/>
/// <returns>true if the path in the uri is visible to all, false otherwise</returns>
/// <exception cref="System.IO.IOException"/>
private static bool CheckPermissionOfOther(FileSystem fs, Path path, FsAction action
, LoadingCache <Path, Future <FileStatus> > statCache)
{
FileStatus status = GetFileStatus(fs, path, statCache);
FsPermission perms = status.GetPermission();
FsAction otherAction = perms.GetOtherAction();
return(otherAction.Implies(action));
}
/// <summary>
/// Checks for a given path whether the Other permissions on it
/// imply the permission in the passed FsAction
/// </summary>
/// <param name="fs"/>
/// <param name="path"/>
/// <param name="action"/>
/// <returns>true if the path in the uri is visible to all, false otherwise</returns>
/// <exception cref="System.IO.IOException"/>
private static bool CheckPermissionOfOther(FileSystem fs, Path path, FsAction action
, IDictionary <URI, FileStatus> statCache)
{
FileStatus status = GetFileStatus(fs, path.ToUri(), statCache);
FsPermission perms = status.GetPermission();
FsAction otherAction = perms.GetOtherAction();
if (otherAction.Implies(action))
{
return(true);
}
return(false);
}
/// <exception cref="Org.Apache.Hadoop.Security.AccessControlException"/>
private void Check(INodeAttributes inode, string path, FsAction access)
{
if (inode == null)
{
return;
}
FsPermission mode = inode.GetFsPermission();
AclFeature aclFeature = inode.GetAclFeature();
if (aclFeature != null)
{
// It's possible that the inode has a default ACL but no access ACL.
int firstEntry = aclFeature.GetEntryAt(0);
if (AclEntryStatusFormat.GetScope(firstEntry) == AclEntryScope.Access)
{
CheckAccessAcl(inode, path, access, mode, aclFeature);
return;
}
}
if (GetUser().Equals(inode.GetUserName()))
{
//user class
if (mode.GetUserAction().Implies(access))
{
return;
}
}
else
{
if (GetGroups().Contains(inode.GetGroupName()))
{
//group class
if (mode.GetGroupAction().Implies(access))
{
return;
}
}
else
{
//other class
if (mode.GetOtherAction().Implies(access))
{
return;
}
}
}
throw new AccessControlException(ToAccessControlString(inode, path, access, mode)
);
}
/// <summary>Reads the existing ACL of an inode.</summary>
/// <remarks>
/// Reads the existing ACL of an inode. This method always returns the full
/// logical ACL of the inode after reading relevant data from the inode's
/// <see cref="Org.Apache.Hadoop.FS.Permission.FsPermission"/>
/// and
/// <see cref="AclFeature"/>
/// . Note that every inode
/// logically has an ACL, even if no ACL has been set explicitly. If the inode
/// does not have an extended ACL, then the result is a minimal ACL consising of
/// exactly 3 entries that correspond to the owner, group and other permissions.
/// This method always reads the inode's current state and does not support
/// querying by snapshot ID. This is because the method is intended to support
/// ACL modification APIs, which always apply a delta on top of current state.
/// </remarks>
/// <param name="inode">INode to read</param>
/// <returns>List<AclEntry> containing all logical inode ACL entries</returns>
public static IList <AclEntry> ReadINodeLogicalAcl(INode inode)
{
FsPermission perm = inode.GetFsPermission();
AclFeature f = inode.GetAclFeature();
if (f == null)
{
return(AclUtil.GetMinimalAcl(perm));
}
IList <AclEntry> existingAcl;
// Split ACL entries stored in the feature into access vs. default.
IList <AclEntry> featureEntries = GetEntriesFromAclFeature(f);
ScopedAclEntries scoped = new ScopedAclEntries(featureEntries);
IList <AclEntry> accessEntries = scoped.GetAccessEntries();
IList <AclEntry> defaultEntries = scoped.GetDefaultEntries();
// Pre-allocate list size for the explicit entries stored in the feature
// plus the 3 implicit entries (owner, group and other) from the permission
// bits.
existingAcl = Lists.NewArrayListWithCapacity(featureEntries.Count + 3);
if (!accessEntries.IsEmpty())
{
// Add owner entry implied from user permission bits.
existingAcl.AddItem(new AclEntry.Builder().SetScope(AclEntryScope.Access).SetType
(AclEntryType.User).SetPermission(perm.GetUserAction()).Build());
// Next add all named user and group entries taken from the feature.
Sharpen.Collections.AddAll(existingAcl, accessEntries);
// Add mask entry implied from group permission bits.
existingAcl.AddItem(new AclEntry.Builder().SetScope(AclEntryScope.Access).SetType
(AclEntryType.Mask).SetPermission(perm.GetGroupAction()).Build());
// Add other entry implied from other permission bits.
existingAcl.AddItem(new AclEntry.Builder().SetScope(AclEntryScope.Access).SetType
(AclEntryType.Other).SetPermission(perm.GetOtherAction()).Build());
}
else
{
// It's possible that there is a default ACL but no access ACL. In this
// case, add the minimal access ACL implied by the permission bits.
Sharpen.Collections.AddAll(existingAcl, AclUtil.GetMinimalAcl(perm));
}
// Add all default entries after the access entries.
Sharpen.Collections.AddAll(existingAcl, defaultEntries);
// The above adds entries in the correct order, so no need to sort here.
return(existingAcl);
}
/// <exception cref="System.IO.IOException"/>
protected internal override void ProcessPath(PathData item)
{
@out.WriteLine("# file: " + item);
@out.WriteLine("# owner: " + item.stat.GetOwner());
@out.WriteLine("# group: " + item.stat.GetGroup());
FsPermission perm = item.stat.GetPermission();
if (perm.GetStickyBit())
{
@out.WriteLine("# flags: --" + (perm.GetOtherAction().Implies(FsAction.Execute) ?
"t" : "T"));
}
AclStatus aclStatus = item.fs.GetAclStatus(item.path);
IList <AclEntry> entries = perm.GetAclBit() ? aclStatus.GetEntries() : Collections
.EmptyList <AclEntry>();
ScopedAclEntries scopedEntries = new ScopedAclEntries(AclUtil.GetAclFromPermAndEntries
(perm, entries));
PrintAclEntriesForSingleScope(aclStatus, perm, scopedEntries.GetAccessEntries());
PrintAclEntriesForSingleScope(aclStatus, perm, scopedEntries.GetDefaultEntries());
@out.WriteLine();
}
/// <exception cref="System.IO.IOException"/>
private static bool CheckPublicPermsForAll(FileSystem fs, FileStatus status, FsAction
dir, FsAction file)
{
FsPermission perms = status.GetPermission();
FsAction otherAction = perms.GetOtherAction();
if (status.IsDirectory())
{
if (!otherAction.Implies(dir))
{
return(false);
}
foreach (FileStatus child in fs.ListStatus(status.GetPath()))
{
if (!CheckPublicPermsForAll(fs, child, dir, file))
{
return(false);
}
}
return(true);
}
return(otherAction.Implies(file));
}
/// <exception cref="System.IO.IOException"/>
private static void UnprotectedRemoveAcl(FSDirectory fsd, INodesInPath iip)
{
System.Diagnostics.Debug.Assert(fsd.HasWriteLock());
INode inode = FSDirectory.ResolveLastINode(iip);
int snapshotId = iip.GetLatestSnapshotId();
AclFeature f = inode.GetAclFeature();
if (f == null)
{
return;
}
FsPermission perm = inode.GetFsPermission();
IList <AclEntry> featureEntries = AclStorage.GetEntriesFromAclFeature(f);
if (featureEntries[0].GetScope() == AclEntryScope.Access)
{
// Restore group permissions from the feature's entry to permission
// bits, overwriting the mask, which is not part of a minimal ACL.
AclEntry groupEntryKey = new AclEntry.Builder().SetScope(AclEntryScope.Access).SetType
(AclEntryType.Group).Build();
int groupEntryIndex = Sharpen.Collections.BinarySearch(featureEntries, groupEntryKey
, AclTransformation.AclEntryComparator);
System.Diagnostics.Debug.Assert(groupEntryIndex >= 0);
FsAction groupPerm = featureEntries[groupEntryIndex].GetPermission();
FsPermission newPerm = new FsPermission(perm.GetUserAction(), groupPerm, perm.GetOtherAction
(), perm.GetStickyBit());
inode.SetPermission(newPerm, snapshotId);
}
inode.RemoveAclFeature(snapshotId);
}
private static PermissionStatus AddImplicitUwx(PermissionStatus parentPerm, PermissionStatus
perm)
{
FsPermission p = parentPerm.GetPermission();
FsPermission ancestorPerm = new FsPermission(p.GetUserAction().Or(FsAction.WriteExecute
), p.GetGroupAction(), p.GetOtherAction());
return(new PermissionStatus(perm.GetUserName(), perm.GetGroupName(), ancestorPerm
));
}
/// <summary>
/// If a default ACL is defined on a parent directory, then copies that default
/// ACL to a newly created child file or directory.
/// </summary>
/// <param name="child">INode newly created child</param>
public static void CopyINodeDefaultAcl(INode child)
{
INodeDirectory parent = child.GetParent();
AclFeature parentAclFeature = parent.GetAclFeature();
if (parentAclFeature == null || !(child.IsFile() || child.IsDirectory()))
{
return;
}
// Split parent's entries into access vs. default.
IList <AclEntry> featureEntries = GetEntriesFromAclFeature(parent.GetAclFeature());
ScopedAclEntries scopedEntries = new ScopedAclEntries(featureEntries);
IList <AclEntry> parentDefaultEntries = scopedEntries.GetDefaultEntries();
// The parent may have an access ACL but no default ACL. If so, exit.
if (parentDefaultEntries.IsEmpty())
{
return;
}
// Pre-allocate list size for access entries to copy from parent.
IList <AclEntry> accessEntries = Lists.NewArrayListWithCapacity(parentDefaultEntries
.Count);
FsPermission childPerm = child.GetFsPermission();
// Copy each default ACL entry from parent to new child's access ACL.
bool parentDefaultIsMinimal = AclUtil.IsMinimalAcl(parentDefaultEntries);
foreach (AclEntry entry in parentDefaultEntries)
{
AclEntryType type = entry.GetType();
string name = entry.GetName();
AclEntry.Builder builder = new AclEntry.Builder().SetScope(AclEntryScope.Access).
SetType(type).SetName(name);
// The child's initial permission bits are treated as the mode parameter,
// which can filter copied permission values for owner, mask and other.
FsAction permission;
if (type == AclEntryType.User && name == null)
{
permission = entry.GetPermission().And(childPerm.GetUserAction());
}
else
{
if (type == AclEntryType.Group && parentDefaultIsMinimal)
{
// This only happens if the default ACL is a minimal ACL: exactly 3
// entries corresponding to owner, group and other. In this case,
// filter the group permissions.
permission = entry.GetPermission().And(childPerm.GetGroupAction());
}
else
{
if (type == AclEntryType.Mask)
{
// Group bits from mode parameter filter permission of mask entry.
permission = entry.GetPermission().And(childPerm.GetGroupAction());
}
else
{
if (type == AclEntryType.Other)
{
permission = entry.GetPermission().And(childPerm.GetOtherAction());
}
else
{
permission = entry.GetPermission();
}
}
}
}
builder.SetPermission(permission);
accessEntries.AddItem(builder.Build());
}
// A new directory also receives a copy of the parent's default ACL.
IList <AclEntry> defaultEntries = child.IsDirectory() ? parentDefaultEntries : Sharpen.Collections
.EmptyList <AclEntry>();
FsPermission newPerm;
if (!AclUtil.IsMinimalAcl(accessEntries) || !defaultEntries.IsEmpty())
{
// Save the new ACL to the child.
child.AddAclFeature(CreateAclFeature(accessEntries, defaultEntries));
newPerm = CreateFsPermissionForExtendedAcl(accessEntries, childPerm);
}
else
{
// The child is receiving a minimal ACL.
newPerm = CreateFsPermissionForMinimalAcl(accessEntries, childPerm);
}
child.SetPermission(newPerm);
}
/// <summary>Checks requested access against an Access Control List.</summary>
/// <remarks>
/// Checks requested access against an Access Control List. This method relies
/// on finding the ACL data in the relevant portions of
/// <see cref="Org.Apache.Hadoop.FS.Permission.FsPermission"/>
/// and
/// <see cref="AclFeature"/>
/// as implemented in the logic of
/// <see cref="AclStorage"/>
/// . This
/// method also relies on receiving the ACL entries in sorted order. This is
/// assumed to be true, because the ACL modification methods in
/// <see cref="AclTransformation"/>
/// sort the resulting entries.
/// More specifically, this method depends on these invariants in an ACL:
/// - The list must be sorted.
/// - Each entry in the list must be unique by scope + type + name.
/// - There is exactly one each of the unnamed user/group/other entries.
/// - The mask entry must not have a name.
/// - The other entry must not have a name.
/// - Default entries may be present, but they are ignored during enforcement.
/// </remarks>
/// <param name="inode">INodeAttributes accessed inode</param>
/// <param name="snapshotId">int snapshot ID</param>
/// <param name="access">FsAction requested permission</param>
/// <param name="mode">FsPermission mode from inode</param>
/// <param name="aclFeature">AclFeature of inode</param>
/// <exception cref="Org.Apache.Hadoop.Security.AccessControlException">if the ACL denies permission
/// </exception>
private void CheckAccessAcl(INodeAttributes inode, string path, FsAction access,
FsPermission mode, AclFeature aclFeature)
{
bool foundMatch = false;
// Use owner entry from permission bits if user is owner.
if (GetUser().Equals(inode.GetUserName()))
{
if (mode.GetUserAction().Implies(access))
{
return;
}
foundMatch = true;
}
// Check named user and group entries if user was not denied by owner entry.
if (!foundMatch)
{
for (int pos = 0; pos < aclFeature.GetEntriesSize(); pos++)
{
entry = aclFeature.GetEntryAt(pos);
if (AclEntryStatusFormat.GetScope(entry) == AclEntryScope.Default)
{
break;
}
AclEntryType type = AclEntryStatusFormat.GetType(entry);
string name = AclEntryStatusFormat.GetName(entry);
if (type == AclEntryType.User)
{
// Use named user entry with mask from permission bits applied if user
// matches name.
if (GetUser().Equals(name))
{
FsAction masked = AclEntryStatusFormat.GetPermission(entry).And(mode.GetGroupAction
());
if (masked.Implies(access))
{
return;
}
foundMatch = true;
break;
}
}
else
{
if (type == AclEntryType.Group)
{
// Use group entry (unnamed or named) with mask from permission bits
// applied if user is a member and entry grants access. If user is a
// member of multiple groups that have entries that grant access, then
// it doesn't matter which is chosen, so exit early after first match.
string group = name == null?inode.GetGroupName() : name;
if (GetGroups().Contains(group))
{
FsAction masked = AclEntryStatusFormat.GetPermission(entry).And(mode.GetGroupAction
());
if (masked.Implies(access))
{
return;
}
foundMatch = true;
}
}
}
}
}
// Use other entry if user was not denied by an earlier match.
if (!foundMatch && mode.GetOtherAction().Implies(access))
{
return;
}
throw new AccessControlException(ToAccessControlString(inode, path, access, mode)
);
}
