Ledger hardware wallet integration #8068

CriesofCarrots · 2020-01-31T20:08:04Z

Problem

Solana users need to be able to manage their keys securely. In particular, they need a secure way to generate keys for genesis accounts. Enter hardware wallets.
Ledger app development is in progress (https://github.com/solana-labs/ledger-app-solana). This work is an initial implementation of CLI and keygen client integration.

Summary of Changes

Add hardware wallet module. Currently only Ledger is supported, but basic utilities and traits are designed to be extensible to other hardware wallets (eg Trezor) in the future.
Integrate Ledger into solana-keygen pubkey subcommand. Enables selection between multiple wallets. Hardware wallet use examples:

solana-keygen pubkey
E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH

solana-keygen pubkey --derivation-path 1/12345
3Hafvf4Sqzj2DxxZJgTH6NBFCofBJzkfPXxymdPDh47b

Work Remaining

Integrate into solana-cli:

Make wallet load and selection generic (currently specific to keygen)
Enable hardware wallets in solana cli: address, airdrop, balance, create-address-with-seed
Enable hardware wallet choice in cli config

Other:

Rework hidapi -> use udev backend
Ship udev rules with ledger module -- Added ledger-udev bin, which must be run as sudo on linux
Update various constants and configuration based on ledger app development, esp error codes

CriesofCarrots · 2020-01-31T20:13:15Z

@garious , I haven't yet found a unique identifier for the Ledger without querying the device. Each device does report a serial number, but both the Ledgers I currently have report the same number ("0001"), so I'm guessing that's not being set in manufacturing.
Any other thoughts?

garious · 2020-01-31T20:47:13Z

solana-keygen pubkey hw

I don't like the hw argument. Instead, I'd like there to be some way to override the path in solana get's keypair. Maybe something like:

$ solana set --keypair usb://<name>
$ solana-keygen pubkey
E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH

And also, that extra output should only be there if the user passes a --verbose option.

Regarding that syntax: usb://<name>, we'll need to think of something better. I've googled a bit for precedent, but nothing promising so far.

solana-keygen pubkey hw 1/12345

That's neat, but how about an option instead, --derivation-path=1/12345. Easy to imagine folks might never use that, and instead look for a simpler option --derivation-index that only accepts a number.

CriesofCarrots · 2020-01-31T21:11:57Z

I don't like the hw argument. Instead, I'd like there to be some way to override the path in solana get's keypair.

Yes, I plan to implement something in the solana-cli config, as noted in the pr description. However, currently solana-keygen does not use/read the solana-cli config. This is a similar issue to that noted here: #7304. The CLI config is just for the cli. It is easy enough to have solana-keygen read that file. Is it enough that solana-cli is the only module that sets it?

And also, that extra output should only be there if the user passes a --verbose option.

Sure

That's neat, but how about an option instead, --derivation-path=1/12345. Easy to imagine folks might never use that, and instead look for a simpler option --derivation-index that only accepts a number.

Do you think the explicit --derivation-whatever args are necessary? If you just want that simpler option, you can do solana-keygen pubkey hw 123 right now.

CriesofCarrots · 2020-01-31T21:31:56Z

usb://<name>, we'll need to think of something better. I've googled a bit for precedent, but nothing promising so far.

@garious usb://<manufacturer>/<model>/<base_pubkey>?
eg for this Nano S: usb://ledger/nano_s/E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH

There is precedent for vendor_id:product_id, but that's pretty opaque.

garious · 2020-01-31T23:02:26Z

I like usb://<manufacturer>/<model>/<base_pubkey>, but hyphenate the spaces instead of the underscore, since URLs generally use hyphens. Also, make it match such that: usb://ledger is sufficient if only one ledger device is connected, and usb://ledger/nano-s is sufficient if one Nano S and one Nano X is connected. Only look for the pubkey if it is given or if there are multiple Nano S's connected.

garious · 2020-02-01T02:24:21Z

Regarding the argument or option, I think optional things should use options. I don't like the idea of modes, where if the keypair points to a USB, you're in "2 argument" mode. There's a reasonable default path, 0.

Cargo.toml

CriesofCarrots · 2020-02-04T01:41:13Z

@garious , I think this is quite a bit closer. Current flow:

$ solana config set --keypair usb://<manufacturer>/<?model>/<?pubkey>/<?derivation-path>
$ solana-keygen pubkey
E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH

// `usb://` path passed explicitly will override the cli config 
$ solana-keygen pubkey usb://ledger/nano-s/5YAHsQHFg6mfr4vhEPvbj1CWtXRDV9fKSV5U3y4hC1Ui
5YAHsQHFg6mfr4vhEPvbj1CWtXRDV9fKSV5U3y4hC1Ui

// derivation-path passed explicitly will override the cli config
$ solana-keygen pubkey --derivation-path 1/2
8vCmhV1XmrJfBYsYKPdE3Dyx6D2pSiTuTMhdrXRm3Veu

If the remote-wallet path (set in config or passed explicitly) matches more than one device (eg. usb://ledger/nano-s when you have 2 Nano S ledgers plugged in), the cli will prompt you to select between those devices.

CriesofCarrots · 2020-02-04T09:27:57Z

Here's example output from the solana-cli implementation:

$ solana balance --verbose

Keypair: usb://ledger/nano-s/E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH/1
Pubkey: 9Uh4C9RokY8TQ592x9WEkp1J2kCMBt3iBX4whWEgDcCc
RPC Endpoint: http://testnet.solana.com:8899
9 SOL

garious · 2020-02-04T15:08:04Z

Is that a derivation path at the end of the keypair URI?

garious · 2020-02-04T15:11:47Z

Un that example, what is the out of solana config get?

CriesofCarrots · 2020-02-04T15:50:15Z

Is that a derivation path at the end of the keypair URI?

Yes. Perhaps it should be stored in a different config setting(?), but it definitely seems useful to be able to set the specific pubkey for a whole batch of actions. Like solana-keygen, usb:// path or --derivation-path passed explicitly will override the cli config.

In that example, what is the out of solana config get?

Currently:

$ solana config get

Wallet Config: ~/.config/solana/cli/config.yml
* url: http://testnet.solana.com:8899
* keypair: usb://ledger/nano-s/E13eqyhs8uJvXtKfmTkt82tiEk1hbz3R2E7GgbMtEYBH/1

garious · 2020-02-04T18:45:16Z

Sounds good to have the derivation path. Just make sure there's lots of unit tests. Things get super weird because a missing --derivation-path means different things in different contexts. Consider:

File path, no --derivation-path
File path, with --derivation-path
USB path, no --derivation-path
USB path, with --derivation-path

The awkward ones is the difference between #1 and #3. If a file path, then no derivation path means that you want the public key for the keypair in that file. If a USB path, then no derivation path means you want the public key at a default derivation path "0".

In any case, most important is that given the same seed phrase, #2 and #4 result in the same public key.

garious · 2020-02-04T18:47:55Z

Regarding the verbose output, too many inconsistencies between solana config get and solana balance --verbose. The former says "Wallet Config" when it should say "config path", it uses lowercase field names whereas solana-balance uses uppercase. Both have lousy field names. "url" is too vague. "keypair" is imprecise. And one is a bulleted list, the other isn't. All this can be fixed in a separate PR, but should be cleaned up sooner than later.

CriesofCarrots · 2020-02-04T18:58:18Z

Regarding the verbose output, too many inconsistencies between solana config get and solana balance --verbose. The former says "Wallet Config" when it should say "config path", it uses lowercase field names whereas solana-balance uses uppercase. Both have lousy field names. "url" is too vague. "keypair" is imprecise.

Fair! Predates this pr, so I'll fix separately and rebase.

garious · 2020-02-06T15:34:25Z

cli/src/cli.rs

+
+    pub(crate) fn pubkey(&self) -> Result<Pubkey, Box<dyn std::error::Error>> {
+        if let Some(path) = &self.keypair_path {
+            if path.starts_with("usb://") {


This expression is repeated a bunch of times and written as those USB is the one special case. If other protocols are added, the filepath will be the syntactic special case. Better would be to:

match parse_keypair_path()? { KeypairUrl::Filepath(keypair_path) => ..., KeypairUrl::Usb(stuff_after_usb_colon_slash_slash) => ..., }

This is a great suggestion. However, I think it is closely related to the CLI refactor that needs to happen to handle various types of signers (present and not), so I'd like to handle it as part of that work.

sounds good

remote-wallet/src/bin/ledger-udev.rs

remote-wallet/src/remote_wallet.rs

keygen/src/keygen.rs

codecov · 2020-02-07T17:54:07Z

Codecov Report

Merging #8068 into master will decrease coverage by 0.4%.
The diff coverage is 29.2%.

@@           Coverage Diff            @@
##           master   #8068     +/-   ##
========================================
- Coverage    81.8%   81.4%   -0.5%     
========================================
  Files         248     250      +2     
  Lines       53533   53988    +455     
========================================
+ Hits        43833   43980    +147     
- Misses       9700   10008    +308

* Initial remote wallet module * Add clap derivation tooling * Add remote-wallet path apis * Implement remote-wallet in solana-keygen * Implement remote-wallet in cli for read-only pubkey usage * Linux: Use udev backend; add udev rules tool * Ignore Ledger live test * Cli api adjustments (cherry picked from commit ed0c1d3) # Conflicts: # Cargo.lock # clap-utils/Cargo.toml # cli/Cargo.toml # keygen/Cargo.toml

* Initial remote wallet module * Add clap derivation tooling * Add remote-wallet path apis * Implement remote-wallet in solana-keygen * Implement remote-wallet in cli for read-only pubkey usage * Linux: Use udev backend; add udev rules tool * Ignore Ledger live test * Cli api adjustments (cherry picked from commit ed0c1d3)

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CriesofCarrots mentioned this pull request Feb 6, 2020

Add libudev-dev to docker image to build remote-wallet #8149

Merged

CriesofCarrots added 7 commits February 6, 2020 17:05

Initial remote wallet module

1426726

Add clap derivation tooling

487a676

Add remote-wallet path apis

d689671

Implement remote-wallet in solana-keygen

3e5404d

Implement remote-wallet in cli for read-only pubkey usage

5a560b8

Linux: Use udev backend; add udev rules tool

7207d28

Ignore Ledger live test

2ebad45

CriesofCarrots force-pushed the ledger-int branch from 39c9959 to e06f755 Compare February 7, 2020 00:21

Cli api adjustments

8e31707

CriesofCarrots force-pushed the ledger-int branch from e06f755 to 8e31707 Compare February 7, 2020 08:20

CriesofCarrots marked this pull request as ready for review February 7, 2020 17:35

garious approved these changes Feb 7, 2020

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CriesofCarrots added the v0.23 label Feb 7, 2020

CriesofCarrots merged commit ed0c1d3 into solana-labs:master Feb 7, 2020

mergify bot mentioned this pull request Feb 7, 2020

Ledger hardware wallet integration (bp #8068) #8169

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solana-grimes pushed a commit that referenced this pull request Feb 7, 2020

Ledger hardware wallet integration (#8068) (#8169)

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Ledger hardware wallet integration #8068

Ledger hardware wallet integration #8068

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Problem

Summary of Changes

Work Remaining

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