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17 Commits (41aac261064602c5eb14ccbacd0a684ffe3ae533)
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> |
2 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> |
2 months ago |
Anton Tolchanov | 781f79408d |
ipn/ipnlocal: allow multiple signature chains from the same SigCredential
Detection of duplicate Network Lock signature chains added in
|
4 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> |
4 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> |
5 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> |
5 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].
|
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 |