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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package client
import (
"bytes"
"context"
"fmt"
"io"
"net/url"
"strconv"
"golang.org/x/xerrors"
// for parsing
"github.com/snapcore/snapd/asserts"
"github.com/snapcore/snapd/snap"
)
// Ack tries to add an assertion to the system assertion
// database. To succeed the assertion must be valid, its signature
// verified with a known public key and the assertion consistent with
// and its prerequisite in the database.
func (client *Client) Ack(b []byte) error {
var rsp any
if _, err := client.doSync("POST", "/v2/assertions", nil, nil, bytes.NewReader(b), &rsp); err != nil {
return err
}
return nil
}
// AssertionTypes returns a list of assertion type names.
func (client *Client) AssertionTypes() ([]string, error) {
var types struct {
Types []string `json:"types"`
}
_, err := client.doSync("GET", "/v2/assertions", nil, nil, nil, &types)
if err != nil {
fmt := "cannot get assertion type names: %w"
return nil, xerrors.Errorf(fmt, err)
}
return types.Types, nil
}
// KnownOptions represent the options of the Known call.
type KnownOptions struct {
// If Remote is true, the store is queried to find the assertion
Remote bool
}
// Known queries assertions with type assertTypeName and matching assertion headers.
func (client *Client) Known(assertTypeName string, headers map[string]string, opts *KnownOptions) ([]asserts.Assertion, error) {
if opts == nil {
opts = &KnownOptions{}
}
path := fmt.Sprintf("/v2/assertions/%s", assertTypeName)
q := url.Values{}
if len(headers) > 0 {
for k, v := range headers {
q.Set(k, v)
}
}
if opts.Remote {
q.Set("remote", "true")
}
response, cancel, err := client.rawWithTimeout(context.Background(), "GET", path, q, nil, nil, nil)
if err != nil {
fmt := "failed to query assertions: %w"
return nil, xerrors.Errorf(fmt, err)
}
defer cancel()
defer response.Body.Close()
if response.StatusCode != 200 {
return nil, parseError(response)
}
assertionsCount, err := strconv.Atoi(response.Header.Get("X-Ubuntu-Assertions-Count"))
if err != nil {
return nil, fmt.Errorf("invalid assertions count")
}
dec := asserts.NewDecoder(response.Body)
asserts := []asserts.Assertion{}
// TODO: make sure asserts can decode and deal with unknown types
for {
a, err := dec.Decode()
if err == io.EOF {
break
}
if err != nil {
return nil, fmt.Errorf("failed to decode assertions: %v", err)
}
asserts = append(asserts, a)
}
if len(asserts) != assertionsCount {
return nil, fmt.Errorf("response did not have the expected number of assertions")
}
return asserts, nil
}
// StoreAccount returns the full store account info for the specified accountID
func (client *Client) StoreAccount(accountID string) (*snap.StoreAccount, error) {
assertions, err := client.Known("account", map[string]string{"account-id": accountID}, nil)
if err != nil {
return nil, err
}
switch len(assertions) {
case 1:
// happy case, break out of the switch
case 0:
return nil, fmt.Errorf("no assertion found for account-id %s", accountID)
default:
// unknown how this could happen...
return nil, fmt.Errorf("multiple assertions for account-id %s", accountID)
}
acct, ok := assertions[0].(*asserts.Account)
if !ok {
return nil, fmt.Errorf("incorrect type of account assertion returned")
}
return &snap.StoreAccount{
ID: acct.AccountID(),
Username: acct.Username(),
DisplayName: acct.DisplayName(),
Validation: acct.Validation(),
}, nil
}
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