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store.go
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store.go
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package cot
import (
"encoding/json"
"fmt"
"github.com/bhoriuchi/cot/go/types"
"gopkg.in/square/go-jose.v2"
)
// unprepareData converts stored data to a type and optinally decrypts
func (c *Node) unprepareData(data *types.StoredData, target interface{}) error {
if data.Encrypted {
if c.encryptionKey == "" {
return fmt.Errorf("cannot decrypt encrypted store data without encryption key")
}
jwe, err := jose.ParseEncrypted(data.Data.(string))
if err != nil {
return err
}
j, err := jwe.Decrypt([]byte(c.encryptionKey))
if err != nil {
return err
}
return json.Unmarshal(j, target)
}
j, err := json.Marshal(data.Data)
if err != nil {
return err
}
return json.Unmarshal(j, target)
}
// prepareData prepares data to be stored by converting it to
// a StoredData type and optinally encrypting the data
func (c *Node) prepareData(id string, data interface{}) (*types.StoredData, error) {
if c.encryptionKey == "" {
storedData := &types.StoredData{
Data: data,
Encrypted: false,
}
return storedData, nil
}
j, err := json.Marshal(data)
if err != nil {
return nil, err
}
enc, err := jose.NewEncrypter(
c.contentEncryption,
jose.Recipient{
Algorithm: c.keyAlgorithm,
Key: []byte(c.encryptionKey),
},
nil,
)
if err != nil {
return nil, err
}
jwe, err := enc.Encrypt(j)
if err != nil {
return nil, err
}
storedData := &types.StoredData{
ID: id,
Data: jwe.FullSerialize(),
Encrypted: true,
}
return storedData, nil
}
// gets storeddata from the store and converts it to keypairs
func (c *Node) getKeyPairs(ids []string) ([]*types.KeyPair, error) {
pairs := []*types.KeyPair{}
pairData, err := c.store.GetKeyPairs(ids)
if err != nil {
return nil, err
}
for _, data := range pairData {
var keyPair types.KeyPair
if err := c.unprepareData(data, &keyPair); err != nil {
return nil, err
}
keyPair.ID = data.ID
pairs = append(pairs, &keyPair)
}
return pairs, nil
}
// gets trusts from the store
func (c *Node) getTrusts(ids []string) ([]*types.Trust, error) {
trusts := []*types.Trust{}
trustData, err := c.store.GetTrusts(ids)
if err != nil {
return nil, err
}
for _, data := range trustData {
var trust types.Trust
if err := c.unprepareData(data, &trust); err != nil {
return nil, err
}
trust.ID = data.ID
trusts = append(trusts, &trust)
}
return trusts, nil
}
// gets storeddata from the store and converts it to keypairs
func (c *Node) getTrustGrantTokens(ids []string) ([]*types.TrustGrantToken, error) {
tokens := []*types.TrustGrantToken{}
tokenData, err := c.store.GetTrustGrantTokens(ids)
if err != nil {
return nil, err
}
for _, data := range tokenData {
var token types.TrustGrantToken
if err := c.unprepareData(data, &token); err != nil {
return nil, err
}
token.ID = data.ID
tokens = append(tokens, &token)
}
return tokens, nil
}
// finds a key pair by issuer
func (c *Node) findKeyPair(issuer string) (*types.KeyPair, error) {
pairs, err := c.getKeyPairs([]string{})
if err != nil {
return nil, err
}
for _, pair := range pairs {
if pair.Issuer == issuer {
return pair, nil
}
}
return nil, ErrNotFound
}
// finds a trust by keyID
func (c *Node) findTrust(keyID string) (*types.Trust, error) {
trusts, err := c.getTrusts([]string{})
if err != nil {
return nil, err
}
for _, trust := range trusts {
if trust.KeyID == keyID {
return trust, nil
}
}
return nil, ErrNotFound
}
// finds a grantToken by token
func (c *Node) findTrustGrantToken(grantToken string) (*types.TrustGrantToken, error) {
tokens, err := c.getTrustGrantTokens([]string{})
if err != nil {
return nil, err
}
for _, token := range tokens {
if token.GrantToken == grantToken {
return token, nil
}
}
return nil, ErrNotFound
}
// puts a key pair in the store
func (c *Node) putKeyPair(id string, keyPair *types.KeyPair) (string, error) {
data, err := c.prepareData(id, keyPair)
if err != nil {
return id, err
}
id, err = c.store.PutKeyPair(data)
if err != nil {
c.log(LogLevelError, "Failed to put trust client key pair", err)
return id, err
}
j, _ := json.Marshal(data)
c.notify(c, c.NewNotification(TopicKeyPairChange, EventKeyPairPut, string(j)))
return id, nil
}
// puts a trust in the store
func (c *Node) putTrust(id string, trust *types.Trust) (string, error) {
data, err := c.prepareData(id, trust)
if err != nil {
return id, err
}
id, err = c.store.PutTrust(data)
if err != nil {
c.log(LogLevelError, "Failed to put trust client trust", err)
return id, err
}
j, _ := json.Marshal(data)
c.notify(c, c.NewNotification(TopicTrustChange, EventTrustPut, string(j)))
return id, nil
}
// puts a trust grant token in the store
func (c *Node) putTrustGrantToken(id string, grantToken *types.TrustGrantToken) (string, error) {
data, err := c.prepareData(id, grantToken)
if err != nil {
return id, err
}
id, err = c.store.PutTrustGrantToken(data)
if err != nil {
c.log(LogLevelError, "Failed to put trust grant token", err)
return id, err
}
j, _ := json.Marshal(data)
c.notify(c, c.NewNotification(TopicGrantTokenChange, EventGrantTokenPut, string(j)))
return id, nil
}
// removes invalid trust grant tokens
func (c *Node) removeInvalidTrustGrantTokens() error {
c.log(LogLevelDebug, "Removing expired and invalid trust grant tokens", nil)
expired := []string{}
list, err := c.getTrustGrantTokens([]string{})
if err != nil {
return err
}
for _, token := range list {
if err := token.Validate(); err != nil {
c.log(LogLevelDebug, fmt.Sprintf("Removing invalid token: %v", err), nil)
expired = append(expired, token.GrantToken)
}
}
err = c.store.DeleteTrustGrantTokens(expired)
if err == nil {
c.notify(c, c.NewNotification(TopicGrantTokenChange, EventGrantTokenBulkDelete, ""))
}
return err
}
// removes a trust
func (c *Node) deleteTrust(id string) error {
err := c.store.DeleteTrusts([]string{id})
if err == nil {
c.notify(c, c.NewNotification(TopicTrustChange, EventTrustDelete, id))
}
return err
}
// remove grant token
func (c *Node) deleteTrustGrantToken(id string) error {
err := c.store.DeleteTrustGrantTokens([]string{id})
if err == nil {
c.notify(c, c.NewNotification(TopicGrantTokenChange, EventGrantTokenDelete, id))
}
return err
}
// remove keypair
func (c *Node) deleteKeyPair(id string) error {
err := c.store.DeleteKeyPairs([]string{id})
if err == nil {
c.notify(c, c.NewNotification(TopicKeyPairChange, EventKeyPairDelete, id))
}
return err
}