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Add secure enclave

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This commit is contained in:
Pavel Korotkov 2020-07-15 13:01:22 +03:00
parent dd31b28ab7
commit d68347ff4d
1 changed files with 97 additions and 52 deletions
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145
neofs/layer/auth.go
View file

@ -1,6 +1,7 @@
package layer
import (
"crypto/ecdsa"
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
@ -11,39 +12,101 @@ import (
)
const (
GatewayKeySize = 2048
gatewayEncryptionKeySize = 2048
)
type keyPair struct {
type (
signatureKeyName byte
encryptionKeyName byte
)
const (
_ signatureKeyName = iota
// Indicates that the key is a NeoFS ECDSA key.
gateNeoFSECDSAKey
gateNeoFSEd25519Key
)
const (
_ encryptionKeyName = iota
// Indicates that the key is used to encrypt
// a bearer token to pass auth procedure.
gateUserAuthKey
)
type (
signatureKeyPair struct {
PrivateKey *ecdsa.PrivateKey
PublicKey *ecdsa.PublicKey
}
encryptionKeyPair struct {
PrivateKey *rsa.PrivateKey
PublicKey *rsa.PublicKey
}
)
type secureEnclave struct {
signatureKeys map[signatureKeyName]signatureKeyPair
encryptionKeys map[encryptionKeyName]encryptionKeyPair
}
type AuthCenter struct {
gatewayKeys keyPair
func newSecureEnclave() (*secureEnclave, error) {
// TODO: Get private keys.
// TODO: Fetch NeoFS and Auth private keys from app settings.
return &secureEnclave{
signatureKeys: map[signatureKeyName]signatureKeyPair{},
encryptionKeys: map[encryptionKeyName]encryptionKeyPair{},
}, nil
}
func NewAuthCenter() (*AuthCenter, error) {
var (
err error
privateKey *rsa.PrivateKey
)
privateKey, err = pullGatewayPrivateKey()
func (se *secureEnclave) Encrypt(keyName encryptionKeyName, data []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha256.New(), rand.Reader, se.encryptionKeys[keyName].PublicKey, data, []byte{})
}
func (se *secureEnclave) Decrypt(keyName encryptionKeyName, data []byte) ([]byte, error) {
return rsa.DecryptOAEP(sha256.New(), rand.Reader, se.encryptionKeys[keyName].PrivateKey, data, []byte{})
}
var globalEnclave *secureEnclave
func init() {
var err error
globalEnclave, err = newSecureEnclave()
if err != nil {
return nil, errors.Wrap(err, "failed to pull gateway private key from trusted enclave")
panic("failed to initialize secure enclave")
}
if privateKey == nil {
if privateKey, err = rsa.GenerateKey(rand.Reader, GatewayKeySize); err != nil {
return nil, errors.Wrap(err, "failed to generate gateway private key")
}
if err = pushGatewayPrivateKey(privateKey); err != nil {
return nil, errors.Wrap(err, "failed to push gateway private key to trusted enclave")
}
}
ac := &AuthCenter{gatewayKeys: keyPair{
PrivateKey: privateKey,
PublicKey: &privateKey.PublicKey,
}}
}
// AuthCenter is a central app's authentication/authorization management unit.
type AuthCenter struct {
zstdEncoder *zstd.Encoder
zstdDecoder *zstd.Decoder
}
// NewAuthCenter creates an instance of AuthCenter.
func NewAuthCenter() (*AuthCenter, error) {
// var (
// err error
// privateKey *rsa.PrivateKey
// )
// secureEnclave := &SecureEnclave{}
// privateKey, err = secureEnclave.PullGatewayEncryptionPrivateKey()
// if err != nil {
// return nil, errors.Wrap(err, "failed to pull gateway private key from trusted enclave")
// }
// if privateKey == nil {
// // TODO: Move this logic to the enclave.
// if privateKey, err = rsa.GenerateKey(rand.Reader, gatewayEncryptionKeySize); err != nil {
// return nil, errors.Wrap(err, "failed to generate gateway private key")
// }
// // if err = keysEnclave.PushGatewayEncryptionPrivateKey(privateKey); err != nil {
// // return nil, errors.Wrap(err, "failed to push gateway private key to trusted enclave")
// // }
// }
zstdEncoder, _ := zstd.NewWriter(nil)
zstdDecoder, _ := zstd.NewReader(nil)
ac := &AuthCenter{zstdEncoder: zstdEncoder, zstdDecoder: zstdDecoder}
return ac, nil
}
@ -52,7 +115,7 @@ func (ac *AuthCenter) PackBearerToken(bearerToken *service.BearerTokenMsg) ([]by
if err != nil {
return nil, errors.Wrap(err, "failed to marshal bearer token")
}
encryptedKeyID, err := ac.encrypt(compress(data))
encryptedKeyID, err := globalEnclave.Encrypt(gateUserAuthKey, ac.compress(data))
if err != nil {
return nil, errors.Wrap(err, "")
}
@ -61,11 +124,11 @@ func (ac *AuthCenter) PackBearerToken(bearerToken *service.BearerTokenMsg) ([]by
func (ac *AuthCenter) UnpackBearerToken(packedBearerToken []byte) (*service.BearerTokenMsg, error) {
compressedKeyID := packedBearerToken[32:]
encryptedKeyID, err := decompress(compressedKeyID)
encryptedKeyID, err := ac.decompress(compressedKeyID)
if err != nil {
return nil, errors.Wrap(err, "failed to decompress key ID")
}
keyID, err := ac.decrypt(encryptedKeyID)
keyID, err := globalEnclave.Decrypt(gateUserAuthKey, encryptedKeyID)
if err != nil {
return nil, errors.Wrap(err, "failed to decrypt key ID")
}
@ -76,35 +139,17 @@ func (ac *AuthCenter) UnpackBearerToken(packedBearerToken []byte) (*service.Bear
return bearerToken, nil
}
func pullGatewayPrivateKey() (*rsa.PrivateKey, error) {
// TODO: Pull the private key from a persistent and trusted enclave.
return nil, nil
}
func pushGatewayPrivateKey(key *rsa.PrivateKey) error {
// TODO: Push the private key to a persistent and trusted enclave.
return nil
}
func (ac *AuthCenter) encrypt(data []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha256.New(), rand.Reader, ac.gatewayKeys.PublicKey, data, []byte{})
}
func (ac *AuthCenter) decrypt(data []byte) ([]byte, error) {
return rsa.DecryptOAEP(sha256.New(), rand.Reader, ac.gatewayKeys.PrivateKey, data, []byte{})
}
func compress(data []byte) []byte {
func (ac *AuthCenter) compress(data []byte) []byte {
ac.zstdEncoder.Reset(nil)
var compressedData []byte
zstdEncoder, _ := zstd.NewWriter(nil)
zstdEncoder.EncodeAll(data, compressedData)
ac.zstdEncoder.EncodeAll(data, compressedData)
return compressedData
}
func decompress(data []byte) ([]byte, error) {
func (ac *AuthCenter) decompress(data []byte) ([]byte, error) {
ac.zstdDecoder.Reset(nil)
var decompressedData []byte
zstdDecoder, _ := zstd.NewReader(nil)
if _, err := zstdDecoder.DecodeAll(data, decompressedData); err != nil {
if _, err := ac.zstdDecoder.DecodeAll(data, decompressedData); err != nil {
return nil, err
}
return decompressedData, nil