4fa7360cd1
All sessions in NeoFS has limited in epochs lifetime. There is a need
to limit the lifetime of private session tokens.
This commmit:
* extends PrivateToken interface with Expired method;
* defines EpochLifetimeStore interface with RemoveExpired method
and embeds it to PrivateTokenStore interface;
* adds epoch value parameter to private token constructor.
45 lines
1,012 B
Go
45 lines
1,012 B
Go
package session
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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crypto "github.com/nspcc-dev/neofs-crypto"
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)
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type pToken struct {
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// private session token
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sessionKey *ecdsa.PrivateKey
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// last epoch of the lifetime
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validUntil uint64
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}
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// NewPrivateToken creates PrivateToken instance that expires after passed epoch.
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//
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// Returns non-nil error on key generation error.
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func NewPrivateToken(validUntil uint64) (PrivateToken, error) {
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sk, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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return nil, err
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}
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return &pToken{
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sessionKey: sk,
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validUntil: validUntil,
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}, nil
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}
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// Sign signs data with session private key.
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func (t *pToken) Sign(data []byte) ([]byte, error) {
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return crypto.Sign(t.sessionKey, data)
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}
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// PublicKey returns a binary representation of the session public key.
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func (t *pToken) PublicKey() []byte {
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return crypto.MarshalPublicKey(&t.sessionKey.PublicKey)
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}
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func (t *pToken) Expired(epoch uint64) bool {
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return t.validUntil < epoch
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}
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