forked from TrueCloudLab/frostfs-s3-gw
197 lines
6.5 KiB
Markdown
197 lines
6.5 KiB
Markdown
# NeoFS AuthMate
|
|
|
|
Authmate is a tool to create gateway AWS credentials. AWS users
|
|
are authenticated with access key IDs and secrets, while NeoFS users are
|
|
authenticated with key pairs. To complicate things further we have S3 gateway
|
|
that usually acts on behalf of some user, but user doesn't necessarily want to
|
|
give their keys to the gateway.
|
|
|
|
To solve this, we use NeoFS bearer tokens that are signed by the owner (NeoFS
|
|
"user") and that can implement any kind of policy for NeoFS requests allowed
|
|
using this token. However, tokens can't be used as AWS credentials directly, thus
|
|
they're stored on NeoFS as regular objects, and access key ID is just an
|
|
address of this object while secret is generated randomly.
|
|
|
|
Tokens are not stored on NeoFS in plaintext, they're encrypted with a set of
|
|
gateway keys. So in order for a gateway to be able to successfully extract bearer
|
|
token, the object needs to be stored in a container available for the gateway
|
|
to read, and it needs to be encrypted with this gateway's key (among others
|
|
potentially).
|
|
|
|
## Variables
|
|
Authmate supports the following variables to decrypt wallets provided by `--wallet` and `--gate-wallet`
|
|
parameters respectevely:
|
|
* `AUTHMATE_WALLET_PASSPHRASE`
|
|
* `AUTHMATE_WALLET_GATE_PASSPHRASE`
|
|
|
|
If the passphrase is not specified, you will be asked to enter the password interactively:
|
|
```
|
|
Enter password for wallet.json >
|
|
```
|
|
|
|
## Generation of wallet
|
|
|
|
To generate wallets for gateways, run the following command:
|
|
|
|
```
|
|
$ ./neo-go wallet init -a -w wallet.json
|
|
|
|
Enter the name of the account > AccountTestName
|
|
Enter passphrase >
|
|
Confirm passphrase >
|
|
|
|
{
|
|
"version": "3.0",
|
|
"accounts": [
|
|
{
|
|
"address": "NhLQpDnerpviUWDF77j5qyjFgavCmasJ4p",
|
|
"key": "6PYUFyYpJ1JGyMrYV8NqeUFLKfpEVHsGGjCYtTDkjnKaSgYizRBZxVerte",
|
|
"label": "AccountTestName",
|
|
"contract": {
|
|
"script": "DCECXCsUZPwUyKHs6nAyyCvJ5s/vLwZkkVtWNC0zWzH8a9dBVuezJw==",
|
|
"parameters": [
|
|
{
|
|
"name": "parameter0",
|
|
"type": "Signature"
|
|
}
|
|
],
|
|
"deployed": false
|
|
},
|
|
"lock": false,
|
|
"isDefault": false
|
|
}
|
|
],
|
|
"scrypt": {
|
|
"n": 16384,
|
|
"r": 8,
|
|
"p": 8
|
|
},
|
|
"extra": {
|
|
"Tokens": null
|
|
}
|
|
}
|
|
|
|
wallet successfully created, file location is wallet.json
|
|
```
|
|
|
|
To get public key from wallet run:
|
|
```
|
|
$ ./bin/neo-go wallet dump-keys -w wallet.json
|
|
|
|
NhLQpDnerpviUWDF77j5qyjFgavCmasJ4p (simple signature contract):
|
|
025c2b1464fc14c8a1ecea7032c82bc9e6cfef2f0664915b56342d335b31fc6bd7
|
|
```
|
|
|
|
## Issuance of a secret
|
|
|
|
To issue a secret means to create a Bearer and (optionally) Session tokens and
|
|
put them as an object into a container on the NeoFS network.
|
|
|
|
By default, the tool creates a container with a name `auth-container` and ACL
|
|
0x3c8c8cce (all operations are forbidden for `OTHERS` and `BEARER` user groups,
|
|
except for `GET`).
|
|
|
|
Also, you can put the tokens into an existing container via `--container-id`
|
|
parameter, but this way is **not recommended**.
|
|
|
|
The tokens are encrypted by a set of gateway keys, so you need to pass them as well.
|
|
|
|
Creation of the bearer token is mandatory, while creation of the session token is
|
|
optional. If you want to add the session token, you need to add a parameter
|
|
`create-session-token`.
|
|
|
|
Rules for bearer token can be set via param `bearer-rules` (json-string and file path allowed), if it is not set,
|
|
it will be auto-generated with values:
|
|
|
|
```
|
|
{
|
|
"version": {
|
|
"major": 2,
|
|
"minor": 6
|
|
},
|
|
"containerID": {
|
|
"value": "%CID"
|
|
},
|
|
"records": [
|
|
{
|
|
"operation": "GET",
|
|
"action": "ALLOW",
|
|
"filters": [],
|
|
"targets": [
|
|
{
|
|
"role": "OTHERS",
|
|
"keys": []
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
```
|
|
|
|
Rules for a session token can be set via param `session-rules` (json-string and file path allowed), the default value is:
|
|
```
|
|
{
|
|
"verb": "PUT",
|
|
"wildcard": true,
|
|
"containerID": null
|
|
}
|
|
```
|
|
|
|
If `session-rules` are set, but `create-session-token` is not, no session
|
|
token will be created.
|
|
|
|
Rules for mapping of `LocationConstraint` ([aws spec](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateBucket.html#API_CreateBucket_RequestBody))
|
|
to `PlacementPolicy` ([neofs spec](https://github.com/nspcc-dev/neofs-spec/blob/master/01-arch/02-policy.md))
|
|
can be set via param `container-policy` (json-string and file path allowed):
|
|
```
|
|
{
|
|
"rep-3": "REP 3",
|
|
"complex": "REP 1 IN X CBF 1 SELECT 1 FROM * AS X",
|
|
"example-json-policy": "{\"replicas\":[{\"count\":3,\"selector\":\"SelASD0\"}],\"container_backup_factor\":3,\"selectors\":[{\"name\":\"SelASD0\",\"count\":3,\"filter\":\"*\"}],\"filters\":[]}"
|
|
}
|
|
```
|
|
|
|
Example of a command to issue a secret with custom rules for multiple gates:
|
|
```
|
|
$ ./neofs-authmate issue-secret --wallet wallet.json \
|
|
--peer 192.168.130.71:8080 \
|
|
--bearer-rules '{"records":[{"operation":"PUT","action":"ALLOW","filters":[],"targets":[{"role":"OTHERS","keys":[]}]}]}' \
|
|
--gate-public-key 0313b1ac3a8076e155a7e797b24f0b650cccad5941ea59d7cfd51a024a8b2a06bf \
|
|
--gate-public-key 0317585fa8274f7afdf1fc5f2a2e7bece549d5175c4e5182e37924f30229aef967 \
|
|
--create-session-token \
|
|
--session-rules '{"verb":"DELETE","wildcard":false,"containerID":{"value":"%CID"}}'
|
|
--container-policy '{"rep-3": "REP 3"}'
|
|
|
|
Enter password for wallet.json >
|
|
{
|
|
"access_key_id": "5g933dyLEkXbbAspouhPPTiyLZRg4axBW1axSPD87eVT0AiXsH4AjYy1iTJ4C1WExzjBrSobJsQFWEyKLREe5sQYM",
|
|
"secret_access_key": "438bbd8243060e1e1c9dd4821756914a6e872ce29bf203b68f81b140ac91231c",
|
|
"owner_private_key": "274fdd6e71fc6a6b8fe77bec500254115d66d6d17347d7db0880d2eb80afc72a",
|
|
"container_id":"5g933dyLEkXbbAspouhPPTiyLZRg4axBW1axSPD87eVT"
|
|
}
|
|
```
|
|
|
|
Access key ID and secret access key are AWS credentials that you can use with
|
|
any S3 client.
|
|
|
|
Access key ID consists of Base58 encoded containerID(cid) and objectID(oid) stored on the NeoFS network and containing
|
|
the secret. Format of access_key_id: `%cid0%oid`, where 0(zero) is a delimiter.
|
|
|
|
## Obtainment of a secret access key
|
|
|
|
You can get a secret access key associated with an access key ID by obtaining a
|
|
secret stored on the NeoFS network. Here is an example of providing one password (for `wallet.json`) via env variable
|
|
and the other (for `gate-wallet.json`) interactively:
|
|
|
|
```
|
|
$ AUTHMATE_WALLET_PASSPHRASE=some-pwd \
|
|
./neofs-authmate obtain-secret --wallet wallet.json \
|
|
--peer 192.168.130.71:8080 \
|
|
--gate-wallet gate-wallet.json \
|
|
--access-key-id 5g933dyLEkXbbAspouhPPTiyLZRg4axBW1axSPD87eVT0AiXsH4AjYy1iTJ4C1WExzjBrSobJsQFWEyKLREe5sQYM
|
|
|
|
Enter password for gate-wallet.json >
|
|
{
|
|
"secret_access_key": "438bbd8243060e1e1c9dd4821756914a6e872ce29bf203b68f81b140ac91231c"
|
|
}
|
|
```
|