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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 asserts
import (
"fmt"
"regexp"
"time"
)
var (
// account ids look like snap-ids or a nice identifier
validAccountID = regexp.MustCompile("^(?:[a-z0-9A-Z]{32}|[-a-z0-9]{2,28})$")
)
// Account holds an account assertion, which ties a name for an account
// to its identifier and provides the authority's confidence in the name's validity.
type Account struct {
assertionBase
validation string
timestamp time.Time
}
func IsValidAccountID(accountID string) bool {
return validAccountID.MatchString(accountID)
}
// AccountID returns the account-id of the account.
func (acc *Account) AccountID() string {
return acc.HeaderString("account-id")
}
// Username returns the user name for the account.
func (acc *Account) Username() string {
return acc.HeaderString("username")
}
// DisplayName returns the human-friendly name for the account.
func (acc *Account) DisplayName() string {
return acc.HeaderString("display-name")
}
// Validation returns the level of confidence of the authority in the
// account's identity, expected to be "unproven", "starred" or "verified".
func (acc *Account) Validation() string {
return acc.validation
}
// Timestamp returns the time when the account was issued.
func (acc *Account) Timestamp() time.Time {
return acc.timestamp
}
// Implement further consistency checks.
func (acc *Account) checkConsistency(db RODatabase, acck *AccountKey) error {
if !db.IsTrustedAccount(acc.AuthorityID()) {
return fmt.Errorf("account assertion for %q is not signed by a directly trusted authority: %s", acc.AccountID(), acc.AuthorityID())
}
return nil
}
// expected interface is implemented
var _ consistencyChecker = (*Account)(nil)
func assembleAccount(assert assertionBase) (Assertion, error) {
_, err := checkNotEmptyString(assert.headers, "display-name")
if err != nil {
return nil, err
}
validation, err := checkNotEmptyString(assert.headers, "validation")
if err != nil {
return nil, err
}
// backward compatibility with the hard-coded trusted account
// assertions
// TODO: generate revision 1 of them with validation
// s/certified/verified/
if validation == "certified" {
validation = "verified"
}
timestamp, err := checkRFC3339Date(assert.headers, "timestamp")
if err != nil {
return nil, err
}
_, err = checkOptionalString(assert.headers, "username")
if err != nil {
return nil, err
}
return &Account{
assertionBase: assert,
validation: validation,
timestamp: timestamp,
}, nil
}
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