forked from cerc-io/plugeth
865 lines
27 KiB
Markdown
865 lines
27 KiB
Markdown
|
Clef
|
||
|
|
----
|
||
|
|
Clef can be used to sign transactions and data and is meant as a replacement for geth's account management.
|
||
|
|
This allows DApps not to depend on geth's account management. When a DApp wants to sign data it can send the data to
|
||
|
|
the signer, the signer will then provide the user with context and asks the user for permission to sign the data. If
|
||
|
|
the users grants the signing request the signer will send the signature back to the DApp.
|
||
|
|
|
||
|
|
This setup allows a DApp to connect to a remote Ethereum node and send transactions that are locally signed. This can
|
||
|
|
help in situations when a DApp is connected to a remote node because a local Ethereum node is not available, not
|
||
|
|
synchronised with the chain or a particular Ethereum node that has no built-in (or limited) account management.
|
||
|
|
|
||
|
|
Clef can run as a daemon on the same machine, or off a usb-stick like [usb armory](https://inversepath.com/usbarmory),
|
||
|
|
or a separate VM in a [QubesOS](https://www.qubes-os.org/) type os setup.
|
||
|
|
|
||
|
|
|
||
|
|
## Command line flags
|
||
|
|
Clef accepts the following command line options:
|
||
|
|
```
|
||
|
|
COMMANDS:
|
||
|
|
init Initialize the signer, generate secret storage
|
||
|
|
attest Attest that a js-file is to be used
|
||
|
|
addpw Store a credential for a keystore file
|
||
|
|
help Shows a list of commands or help for one command
|
||
|
|
|
||
|
|
GLOBAL OPTIONS:
|
||
|
|
--loglevel value log level to emit to the screen (default: 4)
|
||
|
|
--keystore value Directory for the keystore (default: "$HOME/.ethereum/keystore")
|
||
|
|
--configdir value Directory for clef configuration (default: "$HOME/.clef")
|
||
|
|
--networkid value Network identifier (integer, 1=Frontier, 2=Morden (disused), 3=Ropsten, 4=Rinkeby) (default: 1)
|
||
|
|
--lightkdf Reduce key-derivation RAM & CPU usage at some expense of KDF strength
|
||
|
|
--nousb Disables monitoring for and managing USB hardware wallets
|
||
|
|
--rpcaddr value HTTP-RPC server listening interface (default: "localhost")
|
||
|
|
--rpcport value HTTP-RPC server listening port (default: 8550)
|
||
|
|
--signersecret value A file containing the password used to encrypt signer credentials, e.g. keystore credentials and ruleset hash
|
||
|
|
--4bytedb value File containing 4byte-identifiers (default: "./4byte.json")
|
||
|
|
--4bytedb-custom value File used for writing new 4byte-identifiers submitted via API (default: "./4byte-custom.json")
|
||
|
|
--auditlog value File used to emit audit logs. Set to "" to disable (default: "audit.log")
|
||
|
|
--rules value Enable rule-engine (default: "rules.json")
|
||
|
|
--stdio-ui Use STDIN/STDOUT as a channel for an external UI. This means that an STDIN/STDOUT is used for RPC-communication with a e.g. a graphical user interface, and can be used when the signer is started by an external process.
|
||
|
|
--stdio-ui-test Mechanism to test interface between signer and UI. Requires 'stdio-ui'.
|
||
|
|
--help, -h show help
|
||
|
|
--version, -v print the version
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
Example:
|
||
|
|
```
|
||
|
|
signer -keystore /my/keystore -chainid 4
|
||
|
|
```
|
||
|
|
|
||
|
|
Check out the [tutorial](tutorial.md) for some concrete examples on how the signer works.
|
||
|
|
|
||
|
|
## Security model
|
||
|
|
|
||
|
|
The security model of the signer is as follows:
|
||
|
|
|
||
|
|
* One critical component (the signer binary / daemon) is responsible for handling cryptographic operations: signing, private keys, encryption/decryption of keystore files.
|
||
|
|
* The signer binary has a well-defined 'external' API.
|
||
|
|
* The 'external' API is considered UNTRUSTED.
|
||
|
|
* The signer binary also communicates with whatever process that invoked the binary, via stdin/stdout.
|
||
|
|
* This channel is considered 'trusted'. Over this channel, approvals and passwords are communicated.
|
||
|
|
|
||
|
|
The general flow for signing a transaction using e.g. geth is as follows:
|
||
|
|
|
||
|
|
|
||
|
|
In this case, `geth` would be started with `--externalsigner=http://localhost:8550` and would relay requests to `eth.sendTransaction`.
|
||
|
|
|
||
|
|
## TODOs
|
||
|
|
|
||
|
|
Some snags and todos
|
||
|
|
|
||
|
|
* [ ] The signer should take a startup param "--no-change", for UIs that do not contain the capability
|
||
|
|
to perform changes to things, only approve/deny. Such a UI should be able to start the signer in
|
||
|
|
a more secure mode by telling it that it only wants approve/deny capabilities.
|
||
|
|
|
||
|
|
* [x] It would be nice if the signer could collect new 4byte-id:s/method selectors, and have a
|
||
|
|
secondary database for those (`4byte_custom.json`). Users could then (optionally) submit their collections for
|
||
|
|
inclusion upstream.
|
||
|
|
|
||
|
|
* It should be possible to configure the signer to check if an account is indeed known to it, before
|
||
|
|
passing on to the UI. The reason it currently does not, is that it would make it possible to enumerate
|
||
|
|
accounts if it immediately returned "unknown account".
|
||
|
|
* [x] It should be possible to configure the signer to auto-allow listing (certain) accounts, instead of asking every time.
|
||
|
|
* [x] Done Upon startup, the signer should spit out some info to the caller (particularly important when executed in `stdio-ui`-mode),
|
||
|
|
invoking methods with the following info:
|
||
|
|
* [x] Version info about the signer
|
||
|
|
* [x] Address of API (http/ipc)
|
||
|
|
* [ ] List of known accounts
|
||
|
|
* [ ] Have a default timeout on signing operations, so that if the user has not answered withing e.g. 60 seconds, the request is rejected.
|
||
|
|
* [ ] `account_signRawTransaction`
|
||
|
|
* [ ] `account_bulkSignTransactions([] transactions)` should
|
||
|
|
* only exist if enabled via config/flag
|
||
|
|
* only allow non-data-sending transactions
|
||
|
|
* all txs must use the same `from`-account
|
||
|
|
* let the user confirm, showing
|
||
|
|
* the total amount
|
||
|
|
* the number of unique recipients
|
||
|
|
|
||
|
|
* Geth todos
|
||
|
|
- The signer should pass the `Origin` header as call-info to the UI. As of right now, the way that info about the request is
|
||
|
|
put together is a bit of a hack into the http server. This could probably be greatly improved
|
||
|
|
- Relay: Geth should be started in `geth --external_signer localhost:8550`.
|
||
|
|
- Currently, the Geth APIs use `common.Address` in the arguments to transaction submission (e.g `to` field). This
|
||
|
|
type is 20 `bytes`, and is incapable of carrying checksum information. The signer uses `common.MixedcaseAddress`, which
|
||
|
|
retains the original input.
|
||
|
|
- The Geth api should switch to use the same type, and relay `to`-account verbatim to the external api.
|
||
|
|
|
||
|
|
* [x] Storage
|
||
|
|
* [x] An encrypted key-value storage should be implemented
|
||
|
|
* See [rules.md](rules.md) for more info about this.
|
||
|
|
|
||
|
|
* Another potential thing to introduce is pairing.
|
||
|
|
* To prevent spurious requests which users just accept, implement a way to "pair" the caller with the signer (external API).
|
||
|
|
* Thus geth/mist/cpp would cryptographically handshake and afterwards the caller would be allowed to make signing requests.
|
||
|
|
* This feature would make the addition of rules less dangerous.
|
||
|
|
|
||
|
|
* Wallets / accounts. Add API methods for wallets.
|
||
|
|
|
||
|
|
## Communication
|
||
|
|
|
||
|
|
### External API
|
||
|
|
|
||
|
|
The signer listens to HTTP requests on `rpcaddr`:`rpcport`, with the same JSONRPC standard as Geth. The messages are
|
||
|
|
expected to be JSON [jsonrpc 2.0 standard](http://www.jsonrpc.org/specification).
|
||
|
|
|
||
|
|
Some of these call can require user interaction. Clients must be aware that responses
|
||
|
|
may be delayed significanlty or may never be received if a users decides to ignore the confirmation request.
|
||
|
|
|
||
|
|
The External API is **untrusted** : it does not accept credentials over this api, nor does it expect
|
||
|
|
that requests have any authority.
|
||
|
|
|
||
|
|
### UI API
|
||
|
|
|
||
|
|
The signer has one native console-based UI, for operation without any standalone tools.
|
||
|
|
However, there is also an API to communicate with an external UI. To enable that UI,
|
||
|
|
the signer needs to be executed with the `--stdio-ui` option, which allocates the
|
||
|
|
`stdin`/`stdout` for the UI-api.
|
||
|
|
|
||
|
|
An example (insecure) proof-of-concept of has been implemented in `pythonsigner.py`.
|
||
|
|
|
||
|
|
The model is as follows:
|
||
|
|
|
||
|
|
* The user starts the UI app (`pythonsigner.py`).
|
||
|
|
* The UI app starts the `signer` with `--stdio-ui`, and listens to the
|
||
|
|
process output for confirmation-requests.
|
||
|
|
* The `signer` opens the external http api.
|
||
|
|
* When the `signer` receives requests, it sends a `jsonrpc` request via `stdout`.
|
||
|
|
* The UI app prompts the user accordingly, and responds to the `signer`
|
||
|
|
* The `signer` signs (or not), and responds to the original request.
|
||
|
|
|
||
|
|
## External API
|
||
|
|
|
||
|
|
See the [external api changelog](extapi_changelog.md) for information about changes to this API.
|
||
|
|
|
||
|
|
### Encoding
|
||
|
|
- number: positive integers that are hex encoded
|
||
|
|
- data: hex encoded data
|
||
|
|
- string: ASCII string
|
||
|
|
|
||
|
|
All hex encoded values must be prefixed with `0x`.
|
||
|
|
|
||
|
|
## Methods
|
||
|
|
|
||
|
|
### account_new
|
||
|
|
|
||
|
|
#### Create new password protected account
|
||
|
|
|
||
|
|
The signer will generate a new private key, encrypts it according to [web3 keystore spec](https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition) and stores it in the keystore directory.
|
||
|
|
The client is responsible for creating a backup of the keystore. If the keystore is lost there is no method of retrieving lost accounts.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
|
||
|
|
None
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- address [string]: account address that is derived from the generated key
|
||
|
|
- url [string]: location of the keyfile
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 0,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_new",
|
||
|
|
"params": []
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
"id": 0,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": {
|
||
|
|
"address": "0xbea9183f8f4f03d427f6bcea17388bdff1cab133",
|
||
|
|
"url": "keystore:///my/keystore/UTC--2017-08-24T08-40-15.419655028Z--bea9183f8f4f03d427f6bcea17388bdff1cab133"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### account_list
|
||
|
|
|
||
|
|
#### List available accounts
|
||
|
|
List all accounts that this signer currently manages
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
|
||
|
|
None
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- array with account records:
|
||
|
|
- account.address [string]: account address that is derived from the generated key
|
||
|
|
- account.type [string]: type of the
|
||
|
|
- account.url [string]: location of the account
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 1,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_list"
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
"id": 1,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": [
|
||
|
|
{
|
||
|
|
"address": "0xafb2f771f58513609765698f65d3f2f0224a956f",
|
||
|
|
"type": "account",
|
||
|
|
"url": "keystore:///tmp/keystore/UTC--2017-08-24T07-26-47.162109726Z--afb2f771f58513609765698f65d3f2f0224a956f"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"address": "0xbea9183f8f4f03d427f6bcea17388bdff1cab133",
|
||
|
|
"type": "account",
|
||
|
|
"url": "keystore:///tmp/keystore/UTC--2017-08-24T08-40-15.419655028Z--bea9183f8f4f03d427f6bcea17388bdff1cab133"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### account_signTransaction
|
||
|
|
|
||
|
|
#### Sign transactions
|
||
|
|
Signs a transactions and responds with the signed transaction in RLP encoded form.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
2. transaction object:
|
||
|
|
- `from` [address]: account to send the transaction from
|
||
|
|
- `to` [address]: receiver account. If omitted or `0x`, will cause contract creation.
|
||
|
|
- `gas` [number]: maximum amount of gas to burn
|
||
|
|
- `gasPrice` [number]: gas price
|
||
|
|
- `value` [number:optional]: amount of Wei to send with the transaction
|
||
|
|
- `data` [data:optional]: input data
|
||
|
|
- `nonce` [number]: account nonce
|
||
|
|
3. method signature [string:optional]
|
||
|
|
- The method signature, if present, is to aid decoding the calldata. Should consist of `methodname(paramtype,...)`, e.g. `transfer(uint256,address)`. The signer may use this data to parse the supplied calldata, and show the user. The data, however, is considered totally untrusted, and reliability is not expected.
|
||
|
|
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- signed transaction in RLP encoded form [data]
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 2,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_signTransaction",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"from": "0x1923f626bb8dc025849e00f99c25fe2b2f7fb0db",
|
||
|
|
"gas": "0x55555",
|
||
|
|
"gasPrice": "0x1234",
|
||
|
|
"input": "0xabcd",
|
||
|
|
"nonce": "0x0",
|
||
|
|
"to": "0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
|
||
|
|
"value": "0x1234"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 67,
|
||
|
|
"error": {
|
||
|
|
"code": -32000,
|
||
|
|
"message": "Request denied"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
#### Sample call with ABI-data
|
||
|
|
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_signTransaction",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"from": "0x694267f14675d7e1b9494fd8d72fefe1755710fa",
|
||
|
|
"gas": "0x333",
|
||
|
|
"gasPrice": "0x1",
|
||
|
|
"nonce": "0x0",
|
||
|
|
"to": "0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
|
||
|
|
"value": "0x0",
|
||
|
|
"data": "0x4401a6e40000000000000000000000000000000000000000000000000000000000000012"
|
||
|
|
},
|
||
|
|
"safeSend(address)"
|
||
|
|
],
|
||
|
|
"id": 67
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 67,
|
||
|
|
"result": {
|
||
|
|
"raw": "0xf88380018203339407a565b7ed7d7a678680a4c162885bedbb695fe080a44401a6e4000000000000000000000000000000000000000000000000000000000000001226a0223a7c9bcf5531c99be5ea7082183816eb20cfe0bbc322e97cc5c7f71ab8b20ea02aadee6b34b45bb15bc42d9c09de4a6754e7000908da72d48cc7704971491663",
|
||
|
|
"tx": {
|
||
|
|
"nonce": "0x0",
|
||
|
|
"gasPrice": "0x1",
|
||
|
|
"gas": "0x333",
|
||
|
|
"to": "0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
|
||
|
|
"value": "0x0",
|
||
|
|
"input": "0x4401a6e40000000000000000000000000000000000000000000000000000000000000012",
|
||
|
|
"v": "0x26",
|
||
|
|
"r": "0x223a7c9bcf5531c99be5ea7082183816eb20cfe0bbc322e97cc5c7f71ab8b20e",
|
||
|
|
"s": "0x2aadee6b34b45bb15bc42d9c09de4a6754e7000908da72d48cc7704971491663",
|
||
|
|
"hash": "0xeba2df809e7a612a0a0d444ccfa5c839624bdc00dd29e3340d46df3870f8a30e"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
Bash example:
|
||
|
|
```bash
|
||
|
|
#curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"account_signTransaction","params":[{"from":"0x694267f14675d7e1b9494fd8d72fefe1755710fa","gas":"0x333","gasPrice":"0x1","nonce":"0x0","to":"0x07a565b7ed7d7a678680a4c162885bedbb695fe0", "value":"0x0", "data":"0x4401a6e40000000000000000000000000000000000000000000000000000000000000012"},"safeSend(address)"],"id":67}' http://localhost:8550/
|
||
|
|
|
||
|
|
{"jsonrpc":"2.0","id":67,"result":{"raw":"0xf88380018203339407a565b7ed7d7a678680a4c162885bedbb695fe080a44401a6e4000000000000000000000000000000000000000000000000000000000000001226a0223a7c9bcf5531c99be5ea7082183816eb20cfe0bbc322e97cc5c7f71ab8b20ea02aadee6b34b45bb15bc42d9c09de4a6754e7000908da72d48cc7704971491663","tx":{"nonce":"0x0","gasPrice":"0x1","gas":"0x333","to":"0x07a565b7ed7d7a678680a4c162885bedbb695fe0","value":"0x0","input":"0x4401a6e40000000000000000000000000000000000000000000000000000000000000012","v":"0x26","r":"0x223a7c9bcf5531c99be5ea7082183816eb20cfe0bbc322e97cc5c7f71ab8b20e","s":"0x2aadee6b34b45bb15bc42d9c09de4a6754e7000908da72d48cc7704971491663","hash":"0xeba2df809e7a612a0a0d444ccfa5c839624bdc00dd29e3340d46df3870f8a30e"}}}
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
### account_sign
|
||
|
|
|
||
|
|
#### Sign data
|
||
|
|
Signs a chunk of data and returns the calculated signature.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
- account [address]: account to sign with
|
||
|
|
- data [data]: data to sign
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- calculated signature [data]
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 3,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_sign",
|
||
|
|
"params": [
|
||
|
|
"0x1923f626bb8dc025849e00f99c25fe2b2f7fb0db",
|
||
|
|
"0xaabbccdd"
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 3,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": "0x5b6693f153b48ec1c706ba4169960386dbaa6903e249cc79a8e6ddc434451d417e1e57327872c7f538beeb323c300afa9999a3d4a5de6caf3be0d5ef832b67ef1c"
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### account_ecRecover
|
||
|
|
|
||
|
|
#### Recover address
|
||
|
|
Derive the address from the account that was used to sign data from the data and signature.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
- data [data]: data that was signed
|
||
|
|
- signature [data]: the signature to verify
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- derived account [address]
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 4,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_ecRecover",
|
||
|
|
"params": [
|
||
|
|
"0xaabbccdd",
|
||
|
|
"0x5b6693f153b48ec1c706ba4169960386dbaa6903e249cc79a8e6ddc434451d417e1e57327872c7f538beeb323c300afa9999a3d4a5de6caf3be0d5ef832b67ef1c"
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 4,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": "0x1923f626bb8dc025849e00f99c25fe2b2f7fb0db"
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### account_import
|
||
|
|
|
||
|
|
#### Import account
|
||
|
|
Import a private key into the keystore. The imported key is expected to be encrypted according to the web3 keystore
|
||
|
|
format.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
- account [object]: key in [web3 keystore format](https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition) (retrieved with account_export)
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- imported key [object]:
|
||
|
|
- key.address [address]: address of the imported key
|
||
|
|
- key.type [string]: type of the account
|
||
|
|
- key.url [string]: key URL
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 6,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_import",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"address": "c7412fc59930fd90099c917a50e5f11d0934b2f5",
|
||
|
|
"crypto": {
|
||
|
|
"cipher": "aes-128-ctr",
|
||
|
|
"cipherparams": {
|
||
|
|
"iv": "401c39a7c7af0388491c3d3ecb39f532"
|
||
|
|
},
|
||
|
|
"ciphertext": "eb045260b18dd35cd0e6d99ead52f8fa1e63a6b0af2d52a8de198e59ad783204",
|
||
|
|
"kdf": "scrypt",
|
||
|
|
"kdfparams": {
|
||
|
|
"dklen": 32,
|
||
|
|
"n": 262144,
|
||
|
|
"p": 1,
|
||
|
|
"r": 8,
|
||
|
|
"salt": "9a657e3618527c9b5580ded60c12092e5038922667b7b76b906496f021bb841a"
|
||
|
|
},
|
||
|
|
"mac": "880dc10bc06e9cec78eb9830aeb1e7a4a26b4c2c19615c94acb632992b952806"
|
||
|
|
},
|
||
|
|
"id": "09bccb61-b8d3-4e93-bf4f-205a8194f0b9",
|
||
|
|
"version": 3
|
||
|
|
},
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 6,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": {
|
||
|
|
"address": "0xc7412fc59930fd90099c917a50e5f11d0934b2f5",
|
||
|
|
"type": "account",
|
||
|
|
"url": "keystore:///tmp/keystore/UTC--2017-08-24T11-00-42.032024108Z--c7412fc59930fd90099c917a50e5f11d0934b2f5"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### account_export
|
||
|
|
|
||
|
|
#### Export account from keystore
|
||
|
|
Export a private key from the keystore. The exported private key is encrypted with the original passphrase. When the
|
||
|
|
key is imported later this passphrase is required.
|
||
|
|
|
||
|
|
#### Arguments
|
||
|
|
- account [address]: export private key that is associated with this account
|
||
|
|
|
||
|
|
#### Result
|
||
|
|
- exported key, see [web3 keystore format](https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition) for
|
||
|
|
more information
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 5,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"method": "account_export",
|
||
|
|
"params": [
|
||
|
|
"0xc7412fc59930fd90099c917a50e5f11d0934b2f5"
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
Response
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"id": 5,
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"result": {
|
||
|
|
"address": "c7412fc59930fd90099c917a50e5f11d0934b2f5",
|
||
|
|
"crypto": {
|
||
|
|
"cipher": "aes-128-ctr",
|
||
|
|
"cipherparams": {
|
||
|
|
"iv": "401c39a7c7af0388491c3d3ecb39f532"
|
||
|
|
},
|
||
|
|
"ciphertext": "eb045260b18dd35cd0e6d99ead52f8fa1e63a6b0af2d52a8de198e59ad783204",
|
||
|
|
"kdf": "scrypt",
|
||
|
|
"kdfparams": {
|
||
|
|
"dklen": 32,
|
||
|
|
"n": 262144,
|
||
|
|
"p": 1,
|
||
|
|
"r": 8,
|
||
|
|
"salt": "9a657e3618527c9b5580ded60c12092e5038922667b7b76b906496f021bb841a"
|
||
|
|
},
|
||
|
|
"mac": "880dc10bc06e9cec78eb9830aeb1e7a4a26b4c2c19615c94acb632992b952806"
|
||
|
|
},
|
||
|
|
"id": "09bccb61-b8d3-4e93-bf4f-205a8194f0b9",
|
||
|
|
"version": 3
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
## UI API
|
||
|
|
|
||
|
|
These methods needs to be implemented by a UI listener.
|
||
|
|
|
||
|
|
By starting the signer with the switch `--stdio-ui-test`, the signer will invoke all known methods, and expect the UI to respond with
|
||
|
|
denials. This can be used during development to ensure that the API is (at least somewhat) correctly implemented.
|
||
|
|
See `pythonsigner`, which can be invoked via `python3 pythonsigner.py test` to perform the 'denial-handshake-test'.
|
||
|
|
|
||
|
|
All methods in this API uses object-based parameters, so that there can be no mixups of parameters: each piece of data is accessed by key.
|
||
|
|
|
||
|
|
See the [ui api changelog](intapi_changelog.md) for information about changes to this API.
|
||
|
|
|
||
|
|
OBS! A slight deviation from `json` standard is in place: every request and response should be confined to a single line.
|
||
|
|
Whereas the `json` specification allows for linebreaks, linebreaks __should not__ be used in this communication channel, to make
|
||
|
|
things simpler for both parties.
|
||
|
|
|
||
|
|
### ApproveTx
|
||
|
|
|
||
|
|
Invoked when there's a transaction for approval.
|
||
|
|
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
|
||
|
|
Here's a method invocation:
|
||
|
|
```bash
|
||
|
|
|
||
|
|
curl -i -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"account_signTransaction","params":[{"from":"0x694267f14675d7e1b9494fd8d72fefe1755710fa","gas":"0x333","gasPrice":"0x1","nonce":"0x0","to":"0x07a565b7ed7d7a678680a4c162885bedbb695fe0", "value":"0x0", "data":"0x4401a6e40000000000000000000000000000000000000000000000000000000000000012"},"safeSend(address)"],"id":67}' http://localhost:8550/
|
||
|
|
```
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 1,
|
||
|
|
"method": "ApproveTx",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"transaction": {
|
||
|
|
"from": "0x0x694267f14675d7e1b9494fd8d72fefe1755710fa",
|
||
|
|
"to": "0x0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
|
||
|
|
"gas": "0x333",
|
||
|
|
"gasPrice": "0x1",
|
||
|
|
"value": "0x0",
|
||
|
|
"nonce": "0x0",
|
||
|
|
"data": "0x4401a6e40000000000000000000000000000000000000000000000000000000000000012",
|
||
|
|
"input": null
|
||
|
|
},
|
||
|
|
"call_info": [
|
||
|
|
{
|
||
|
|
"type": "WARNING",
|
||
|
|
"message": "Invalid checksum on to-address"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"type": "Info",
|
||
|
|
"message": "safeSend(address: 0x0000000000000000000000000000000000000012)"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"meta": {
|
||
|
|
"remote": "127.0.0.1:48486",
|
||
|
|
"local": "localhost:8550",
|
||
|
|
"scheme": "HTTP/1.1"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
The same method invocation, but with invalid data:
|
||
|
|
```bash
|
||
|
|
|
||
|
|
curl -i -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"account_signTransaction","params":[{"from":"0x694267f14675d7e1b9494fd8d72fefe1755710fa","gas":"0x333","gasPrice":"0x1","nonce":"0x0","to":"0x07a565b7ed7d7a678680a4c162885bedbb695fe0", "value":"0x0", "data":"0x4401a6e40000000000000002000000000000000000000000000000000000000000000012"},"safeSend(address)"],"id":67}' http://localhost:8550/
|
||
|
|
```
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 1,
|
||
|
|
"method": "ApproveTx",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"transaction": {
|
||
|
|
"from": "0x0x694267f14675d7e1b9494fd8d72fefe1755710fa",
|
||
|
|
"to": "0x0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
|
||
|
|
"gas": "0x333",
|
||
|
|
"gasPrice": "0x1",
|
||
|
|
"value": "0x0",
|
||
|
|
"nonce": "0x0",
|
||
|
|
"data": "0x4401a6e40000000000000002000000000000000000000000000000000000000000000012",
|
||
|
|
"input": null
|
||
|
|
},
|
||
|
|
"call_info": [
|
||
|
|
{
|
||
|
|
"type": "WARNING",
|
||
|
|
"message": "Invalid checksum on to-address"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"type": "WARNING",
|
||
|
|
"message": "Transaction data did not match ABI-interface: WARNING: Supplied data is stuffed with extra data. \nWant 0000000000000002000000000000000000000000000000000000000000000012\nHave 0000000000000000000000000000000000000000000000000000000000000012\nfor method safeSend(address)"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"meta": {
|
||
|
|
"remote": "127.0.0.1:48492",
|
||
|
|
"local": "localhost:8550",
|
||
|
|
"scheme": "HTTP/1.1"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
One which has missing `to`, but with no `data`:
|
||
|
|
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 3,
|
||
|
|
"method": "ApproveTx",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"transaction": {
|
||
|
|
"from": "",
|
||
|
|
"to": null,
|
||
|
|
"gas": "0x0",
|
||
|
|
"gasPrice": "0x0",
|
||
|
|
"value": "0x0",
|
||
|
|
"nonce": "0x0",
|
||
|
|
"data": null,
|
||
|
|
"input": null
|
||
|
|
},
|
||
|
|
"call_info": [
|
||
|
|
{
|
||
|
|
"type": "CRITICAL",
|
||
|
|
"message": "Tx will create contract with empty code!"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"meta": {
|
||
|
|
"remote": "signer binary",
|
||
|
|
"local": "main",
|
||
|
|
"scheme": "in-proc"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
### ApproveExport
|
||
|
|
|
||
|
|
Invoked when a request to export an account has been made.
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 7,
|
||
|
|
"method": "ApproveExport",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"address": "0x0000000000000000000000000000000000000000",
|
||
|
|
"meta": {
|
||
|
|
"remote": "signer binary",
|
||
|
|
"local": "main",
|
||
|
|
"scheme": "in-proc"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### ApproveListing
|
||
|
|
|
||
|
|
Invoked when a request for account listing has been made.
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 5,
|
||
|
|
"method": "ApproveListing",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"accounts": [
|
||
|
|
{
|
||
|
|
"type": "Account",
|
||
|
|
"url": "keystore:///home/bazonk/.ethereum/keystore/UTC--2017-11-20T14-44-54.089682944Z--123409812340981234098123409812deadbeef42",
|
||
|
|
"address": "0x123409812340981234098123409812deadbeef42"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"type": "Account",
|
||
|
|
"url": "keystore:///home/bazonk/.ethereum/keystore/UTC--2017-11-23T21-59-03.199240693Z--cafebabedeadbeef34098123409812deadbeef42",
|
||
|
|
"address": "0xcafebabedeadbeef34098123409812deadbeef42"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"meta": {
|
||
|
|
"remote": "signer binary",
|
||
|
|
"local": "main",
|
||
|
|
"scheme": "in-proc"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
### ApproveSignData
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 4,
|
||
|
|
"method": "ApproveSignData",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"address": "0x123409812340981234098123409812deadbeef42",
|
||
|
|
"raw_data": "0x01020304",
|
||
|
|
"message": "\u0019Ethereum Signed Message:\n4\u0001\u0002\u0003\u0004",
|
||
|
|
"hash": "0x7e3a4e7a9d1744bc5c675c25e1234ca8ed9162bd17f78b9085e48047c15ac310",
|
||
|
|
"meta": {
|
||
|
|
"remote": "signer binary",
|
||
|
|
"local": "main",
|
||
|
|
"scheme": "in-proc"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### ShowInfo
|
||
|
|
|
||
|
|
The UI should show the info to the user. Does not expect response.
|
||
|
|
|
||
|
|
#### Sample call
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 9,
|
||
|
|
"method": "ShowInfo",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"text": "Tests completed"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### ShowError
|
||
|
|
|
||
|
|
The UI should show the info to the user. Does not expect response.
|
||
|
|
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 2,
|
||
|
|
"method": "ShowError",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"text": "Testing 'ShowError'"
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### OnApproved
|
||
|
|
|
||
|
|
`OnApprovedTx` is called when a transaction has been approved and signed. The call contains the return value that will be sent to the external caller. The return value from this method is ignored - the reason for having this callback is to allow the ruleset to keep track of approved transactions.
|
||
|
|
|
||
|
|
When implementing rate-limited rules, this callback should be used.
|
||
|
|
|
||
|
|
TLDR; Use this method to keep track of signed transactions, instead of using the data in `ApproveTx`.
|
||
|
|
|
||
|
|
### OnSignerStartup
|
||
|
|
|
||
|
|
This method provide the UI with information about what API version the signer uses (both internal and external) aswell as build-info and external api,
|
||
|
|
in k/v-form.
|
||
|
|
|
||
|
|
Example call:
|
||
|
|
```json
|
||
|
|
|
||
|
|
{
|
||
|
|
"jsonrpc": "2.0",
|
||
|
|
"id": 1,
|
||
|
|
"method": "OnSignerStartup",
|
||
|
|
"params": [
|
||
|
|
{
|
||
|
|
"info": {
|
||
|
|
"extapi_http": "http://localhost:8550",
|
||
|
|
"extapi_ipc": null,
|
||
|
|
"extapi_version": "2.0.0",
|
||
|
|
"intapi_version": "1.2.0"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
### Rules for UI apis
|
||
|
|
|
||
|
|
A UI should conform to the following rules.
|
||
|
|
|
||
|
|
* A UI MUST NOT load any external resources that were not embedded/part of the UI package.
|
||
|
|
* For example, not load icons, stylesheets from the internet
|
||
|
|
* Not load files from the filesystem, unless they reside in the same local directory (e.g. config files)
|
||
|
|
* A Graphical UI MUST show the blocky-identicon for ethereum addresses.
|
||
|
|
* A UI MUST warn display approproate warning if the destination-account is formatted with invalid checksum.
|
||
|
|
* A UI MUST NOT open any ports or services
|
||
|
|
* The signer opens the public port
|
||
|
|
* A UI SHOULD verify the permissions on the signer binary, and refuse to execute or warn if permissions allow non-user write.
|
||
|
|
* A UI SHOULD inform the user about the `SHA256` or `MD5` hash of the binary being executed
|
||
|
|
* A UI SHOULD NOT maintain a secondary storage of data, e.g. list of accounts
|
||
|
|
* The signer provides accounts
|
||
|
|
* A UI SHOULD, to the best extent possible, use static linking / bundling, so that requried libraries are bundled
|
||
|
|
along with the UI.
|
||
|
|
|
||
|
|
|