[#12] services/session: Implement service executor

Implement Session service executor that generates private token and stores
it to map.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2020-08-24 18:50:57 +03:00 committed by Alex Vanin
parent de12d751e9
commit f5a0e354ef
3 changed files with 122 additions and 0 deletions

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package storage
import (
"context"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"github.com/google/uuid"
"github.com/mr-tron/base58"
"github.com/nspcc-dev/neofs-api-go/v2/session"
crypto "github.com/nspcc-dev/neofs-crypto"
"github.com/pkg/errors"
)
func (s *TokenStore) Create(ctx context.Context, body *session.CreateRequestBody) (*session.CreateResponseBody, error) {
ownerBytes, err := body.GetOwnerID().StableMarshal(nil)
if err != nil {
panic(err)
}
uid, err := uuid.NewRandom()
if err != nil {
return nil, errors.Wrap(err, "could not generate token ID")
}
uidBytes, err := uid.MarshalBinary()
if err != nil {
return nil, errors.Wrap(err, "could not marshal token ID")
}
sk, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, err
}
s.mtx.Lock()
s.tokens[key{
tokenID: base58.Encode(uidBytes),
ownerID: base58.Encode(ownerBytes),
}] = &PrivateToken{
sessionKey: sk,
exp: body.GetExpiration(),
}
s.mtx.Unlock()
res := new(session.CreateResponseBody)
res.SetID(uidBytes)
res.SetSessionKey(
crypto.MarshalPublicKey(&sk.PublicKey),
)
return res, nil
}

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package storage
import (
"errors"
"sync"
"github.com/mr-tron/base58"
"github.com/nspcc-dev/neofs-api-go/v2/refs"
)
type key struct {
tokenID string
ownerID string
}
type TokenStore struct {
mtx *sync.RWMutex
tokens map[key]*PrivateToken
}
var ErrNotFound = errors.New("private token not found")
// New creates, initializes and returns a new TokenStore instance.
//
// The elements of the instance are stored in the map.
func New() *TokenStore {
return &TokenStore{
mtx: new(sync.RWMutex),
tokens: make(map[key]*PrivateToken),
}
}
// Get returns private token corresponding to the given identifiers.
//
// Returns nil is there is no element in storage.
func (s *TokenStore) Get(ownerID *refs.OwnerID, tokenID []byte) *PrivateToken {
ownerBytes, err := ownerID.StableMarshal(nil)
if err != nil {
panic(err)
}
s.mtx.RLock()
t := s.tokens[key{
tokenID: base58.Encode(tokenID),
ownerID: base58.Encode(ownerBytes),
}]
s.mtx.RUnlock()
return t
}

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package storage
import (
"crypto/ecdsa"
)
// PrivateToken represents private session info.
type PrivateToken struct {
sessionKey *ecdsa.PrivateKey
exp uint64
}
// SessionKey returns the private session key.
func (t *PrivateToken) SessionKey() *ecdsa.PrivateKey {
return t.sessionKey
}