This commit adds a feature for creating a user without password. The
purpose of the feature is reducing attack surface by configuring bad
passwords (CN based auth will be allowed for the user).
The feature can be used with `--no-password` of `etcdctl user add`
command.
Fix https://github.com/coreos/etcd/issues/9590
Current etcd code uses the string literals ("token", "authorization")
as field names of grpc and swappger metadata for passing token. It is
difficult to maintain so this commit introduces new constants for the
purpose.
This commit adds a new auth token provider named nop. The nop provider
refuses every Authenticate() request so CN based authentication can
only be allowed. If the tokenOpts parameter of auth.NewTokenProvider()
is empty, the provider will be used.
"WithRoot" is only used within local node, and
"AuthInfoFromCtx" expects token from incoming context.
Embed token with "NewIncomingContext" so that token
can be found in "AuthInfoFromCtx".
Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
Current UserGet() and RoleGet() RPCs require admin permission. It
means that users cannot know which roles they belong to and what
permissions the roles have. This commit change the semantics and now
users can know their roles and permissions.
Currently clients can revoke any lease without permission. This commit
lets etcdserver protect revoking with write permission.
This commit adds a mechanism for generating internal token. It is used
for indicating that LeaseRevoke was issued internally so it should be
able to delete any attached keys.
This commit change the type of cached permission information from the
home made thing to interval tree. It improves computational complexity
of permission checking from O(n) to O(lg n).
This commit resolves a TODO of auth store:
Current scheme of role deletion allows existing users to have the
deleted roles. Assume a case like below:
create a role r1
create a user u1 and grant r1 to u1
delete r1
After this sequence, u1 is still granted the role r1. So if admin
create a new role with the name r1, The new r1 is automatically
granted u1. In some cases, it would be confusing. So we need to
revoke the deleted role from all users.
If the context does not include auth information, get authinfo will
return a nil auth info and a nil error. This is then passed to
IsAdminPermitted, which would dereference the nil auth info.
