tailscale

Commit Graph

Author	SHA1	Message	Date
Anton Tolchanov	fd6686d81a	tka: truncate long rotation signature chains When a rotation signature chain reaches a certain size, remove the oldest rotation signature from the chain before wrapping it in a new rotation signature. Since all previous rotation signatures are signed by the same wrapping pubkey (node's own tailnet lock key), the node can re-construct the chain, re-signing previous rotation signatures. This will satisfy the existing certificate validation logic. Updates #13185 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	3 months ago
Anton Tolchanov	151b77f9d6	cmd/tl-longchain: tool to re-sign nodes with long rotation signatures In Tailnet Lock, there is an implicit limit on the number of rotation signatures that can be chained before the signature becomes too long. This program helps tailnet admins to identify nodes that have signatures with long chains and prints commands to re-sign those node keys with a fresh direct signature. It's a temporary mitigation measure, and we will remove this tool as we design and implement a long-term approach for rotation signatures. Example output: ``` 2024/08/20 18:25:03 Self: does not need re-signing 2024/08/20 18:25:03 Visible peers with valid signatures: 2024/08/20 18:25:03 Peer xxx2.yy.ts.net. (100.77.192.34) nodeid=nyDmhiZiGA11KTM59, current signature kind=direct: does not need re-signing 2024/08/20 18:25:03 Peer xxx3.yy.ts.net. (100.84.248.22) nodeid=ndQ64mDnaB11KTM59, current signature kind=direct: does not need re-signing 2024/08/20 18:25:03 Peer xxx4.yy.ts.net. (100.85.253.53) nodeid=nmZfVygzkB21KTM59, current signature kind=rotation: chain length 4, printing command to re-sign tailscale lock sign nodekey:530bddbfbe69e91fe15758a1d6ead5337aa6307e55ac92dafad3794f8b3fc661 tlpub:4bf07597336703395f2149dce88e7c50dd8694ab5bbde3d7c2a1c7b3e231a3c2 ``` To support this, the NetworkLockStatus localapi response now includes information about signatures of all peers rather than just the invalid ones. This is not displayed by default in `tailscale lock status`, but will be surfaced in `tailscale lock status --json`. Updates #13185 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	3 months ago
Anton Tolchanov	781f79408d	ipn/ipnlocal: allow multiple signature chains from the same SigCredential Detection of duplicate Network Lock signature chains added in `01847e0123` failed to account for chains originating with a SigCredential signature, which is used for wrapped auth keys. This results in erroneous removal of signatures that originate from the same re-usable auth key. This change ensures that multiple nodes created by the same re-usable auth key are not getting filtered out by the network lock. Updates tailscale/corp#19764 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	5 months ago
Anton Tolchanov	4651827f20	tka: test SigCredential signatures and netmap filtering This change moves handling of wrapped auth keys to the `tka` package and adds a test covering auth key originating signatures (SigCredential) in netmap. Updates tailscale/corp#19764 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	5 months ago
Anton Tolchanov	01847e0123	ipn/ipnlocal: discard node keys that have been rotated out A non-signing node can be allowed to re-sign its new node keys following key renewal/rotation (e.g. via `tailscale up --force-reauth`). To be able to do this, node's TLK is written into WrappingPubkey field of the initial SigDirect signature, signed by a signing node. The intended use of this field implies that, for each WrappingPubkey, we typically expect to have at most one active node with a signature tracing back to that key. Multiple valid signatures referring to the same WrappingPubkey can occur if a client's state has been cloned, but it's something we explicitly discourage and don't support: https://tailscale.com/s/clone This change propagates rotation details (wrapping public key, a list of previous node keys that have been rotated out) to netmap processing, and adds tracking of obsolete node keys that, when found, will get filtered out. Updates tailscale/corp#19764 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	6 months ago
Anton Tolchanov	32120932a5	cmd/tailscale/cli: print node signature in `tailscale lock status` - Add current node signature to `ipnstate.NetworkLockStatus`; - Print current node signature in a human-friendly format as part of `tailscale lock status`. Examples: ``` $ tailscale lock status Tailnet lock is ENABLED. This node is accessible under tailnet lock. Node signature: SigKind: direct Pubkey: [OTB3a] KeyID: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 WrappingPubkey: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 This node's tailnet-lock key: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 Trusted signing keys: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 1 (self) tlpub:6fa21d242a202b290de85926ba3893a6861888679a73bc3a43f49539d67c9764 1 (pre-auth key kq3NzejWoS11KTM59) ``` For a node created via a signed auth key: ``` This node is accessible under tailnet lock. Node signature: SigKind: rotation Pubkey: [e3nAO] Nested: SigKind: credential KeyID: tlpub:6fa21d242a202b290de85926ba3893a6861888679a73bc3a43f49539d67c9764 WrappingPubkey: tlpub:3623b0412cab0029cb1918806435709b5947ae03554050f20caf66629f21220a ``` For a node that rotated its key a few times: ``` This node is accessible under tailnet lock. Node signature: SigKind: rotation Pubkey: [DOzL4] Nested: SigKind: rotation Pubkey: [S/9yU] Nested: SigKind: rotation Pubkey: [9E9v4] Nested: SigKind: direct Pubkey: [3QHTJ] KeyID: tlpub:44a0e23cd53a4b8acc02f6732813d8f5ba8b35d02d48bf94c9f1724ebe31c943 WrappingPubkey: tlpub:2faa280025d3aba0884615f710d8c50590b052c01a004c2b4c2c9434702ae9d0 ``` Updates tailscale/corp#19764 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	6 months ago
Tom DNetto	bec9815f02	tka: guard against key-length panics when verifying signatures In late 2022 a subtle but crucial part of documentation was added to ed25519.Verify: It will panic if len(publicKey) is not [PublicKeySize]. `02ed0e5e67` This change catches that error so it won't lead to a panic. Signed-off-by: Tom DNetto <tom@tailscale.com> Updates https://github.com/tailscale/corp/issues/8568	1 year ago
Tom DNetto	abc874b04e	tka: add public API on NodeKeySignature key information This is needed in the coordination server. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Tom DNetto	e8a11f6181	tka: make rotation signatures use nested keyID Duplicating this at each layer doesnt make any sense, and is another invariant where things could go wrong. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Tom DNetto	be95aebabd	tka: implement credential signatures (key material delegation) This will be needed to support preauth-keys with network lock in the future, so getting the core mechanics out of the way now. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	a78f8fa701	tka: support rotating node-keys in node-key signatures Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	facafd8819	client,cmd/tailscale,ipn,tka,types: implement tka initialization flow This PR implements the client-side of initializing network-lock with the Coordination server. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	06eac9bbff	tka: Use strict decoding settings, implement Unserialize() Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	f50043f6cb	tka,types/key: remove dependency for tailcfg & types/ packages on tka Following the pattern elsewhere, we create a new tka-specific types package for the types that need to couple between the serialized structure types, and tka. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	8cfd775885	tka,types/key: implement direct node-key signatures Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago

17 Commits (cf41cec5a8da13809fab472e221aecd099009b6f)