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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2019 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 daemon
import (
"errors"
"fmt"
"net/http"
"net/url"
"strconv"
"github.com/snapcore/snapd/asserts"
"github.com/snapcore/snapd/overlord/assertstate"
"github.com/snapcore/snapd/overlord/auth"
)
var (
// TODO: allow to post assertions for UserOK? they are verified anyway
assertsCmd = &Command{
Path: "/v2/assertions",
GET: getAssertTypeNames,
POST: doAssert,
ReadAccess: openAccess{},
WriteAccess: authenticatedAccess{},
}
assertsFindManyCmd = &Command{
Path: "/v2/assertions/{assertType}",
GET: assertsFindMany,
ReadAccess: openAccess{},
}
)
// a helper type for parsing the options specified to /v2/assertions and other
// such endpoints that can either do JSON or assertion depending on the value
// of the the URL query parameters
type daemonAssertOptions struct {
jsonResult bool
headersOnly bool
remote bool
headers map[string]string
}
// helper for parsing url query options into formatting option vars
func parseHeadersFormatOptionsFromURL(q url.Values) (*daemonAssertOptions, error) {
res := daemonAssertOptions{}
res.headers = make(map[string]string)
for k := range q {
v := q.Get(k)
switch k {
case "remote":
switch v {
case "true", "false":
res.remote, _ = strconv.ParseBool(v)
default:
return nil, errors.New(`"remote" query parameter when used must be set to "true" or "false" or left unset`)
}
case "json":
switch v {
case "false":
res.jsonResult = false
case "headers":
res.headersOnly = true
fallthrough
case "true":
res.jsonResult = true
default:
return nil, errors.New(`"json" query parameter when used must be set to "true" or "headers"`)
}
default:
res.headers[k] = v
}
}
return &res, nil
}
func getAssertTypeNames(c *Command, r *http.Request, user *auth.UserState) Response {
return SyncResponse(map[string][]string{
"types": asserts.TypeNames(),
})
}
func doAssert(c *Command, r *http.Request, user *auth.UserState) Response {
batch := asserts.NewBatch(nil)
_, err := batch.AddStream(r.Body)
if err != nil {
return BadRequest("cannot decode request body into assertions: %v", err)
}
state := c.d.overlord.State()
state.Lock()
defer state.Unlock()
if err := assertstate.AddBatch(state, batch, &asserts.CommitOptions{
Precheck: true,
}); err != nil {
return BadRequest("assert failed: %v", err)
}
return SyncResponse(nil)
}
func assertsFindOneRemote(c *Command, at *asserts.AssertionType, headers map[string]string, user *auth.UserState) ([]asserts.Assertion, error) {
primaryKeys, err := asserts.PrimaryKeyFromHeaders(at, headers)
if err != nil {
return nil, fmt.Errorf("cannot query remote assertion: %v", err)
}
sto := storeFrom(c.d)
as, err := sto.Assertion(at, primaryKeys, user)
if err != nil {
return nil, err
}
return []asserts.Assertion{as}, nil
}
func assertsFindManyInState(c *Command, at *asserts.AssertionType, headers map[string]string, opts *daemonAssertOptions) ([]asserts.Assertion, error) {
state := c.d.overlord.State()
state.Lock()
db := assertstate.DB(state)
state.Unlock()
return db.FindMany(at, opts.headers)
}
func assertsFindMany(c *Command, r *http.Request, user *auth.UserState) Response {
assertTypeName := muxVars(r)["assertType"]
assertType := asserts.Type(assertTypeName)
if assertType == nil {
return BadRequest("invalid assert type: %q", assertTypeName)
}
opts, err := parseHeadersFormatOptionsFromURL(r.URL.Query())
if err != nil {
return BadRequest(err.Error())
}
var assertions []asserts.Assertion
if opts.remote {
assertions, err = assertsFindOneRemote(c, assertType, opts.headers, user)
} else {
assertions, err = assertsFindManyInState(c, assertType, opts.headers, opts)
}
if err != nil && !errors.Is(err, &asserts.NotFoundError{}) {
return InternalError("searching assertions failed: %v", err)
}
if opts.jsonResult {
assertsJSON := make([]struct {
Headers map[string]any `json:"headers,omitempty"`
Body string `json:"body,omitempty"`
}, len(assertions))
for i := range assertions {
assertsJSON[i].Headers = assertions[i].Headers()
if !opts.headersOnly {
assertsJSON[i].Body = string(assertions[i].Body())
}
}
return SyncResponse(assertsJSON)
}
return AssertResponse(assertions, true)
}
|
