purekit

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 Go to latest Published: Apr 1, 2020 License: BSD-3-Clause Imports: 16 Imported by: 0

README

Virgil PureKit Go

Build Status Release version GitHub license API Reference

Introduction | Features | Benefits | Installation | Resources | License | Support

Introduction

Virgil Security introduces Virgil PureKit - an open-source security framework for enabling post-compromise protection for stored data. PureKit allows developers to protect users' passwords and personal data from hacking and securely share data.

The framework can be used within any database or login system that uses a password, so it’s applicable for a company of any industry or size.

Password-Based Security

Virgil PureKit is based on the Password-Hardened Encryption (PHE) protocol – a powerful and revolutionary cryptographic technology that provides stronger and more modern security, that protects users' data and reduces the security risks associated with weak passwords.

PureKit brings data security to a new level in three ways:

  1. Replaces password hashing in a way making it impossible to run offline and online attacks. By interacting with PHE Service, a standalone cryptographic service in Virgil Cloud dedicated to implement PHE protocol, PureKit creates a unique user’s record that is associated with the user password. It is important to note that a user password is never transmitted to the PHE service in any form.
  2. Encrypts data with user’s personal encryption keys. PureKit gives users a possibility to encrypt their data with personal encryption keys, and all keys can be revealed only after providing a correct password.
  3. Immediately invalidate stolen database. Even if your database has been compromised it impossible to run offline attacks, to retrieve user password or decrypt data. At the same time, PureKit provides convenient and secure key rotation procedure, that allows you quickly update all your server keys without losing access to your data.

Features

  • Per-user data and files encryption
  • Password protection against hacking
  • Management of data encryption keys
  • Secure data and files sharing
  • Role-based data encryption

Benefits

  • Users control data access
  • Post-compromise security
  • Password & data protection from online and offline attacks
  • Replaces salting and hashing of passwords
  • Zero knowledge of user passwords and secret keys
  • Virgil Security has no access to your data
  • Encryption occurs independently of database security
  • Works with any database
  • Stronger than encryption at-rest and TDE
  • More secure than AWS and Google Key Management Systems (KMS)
  • Instant invalidation of stolen databases
  • Compliance with GDPR, HIPAA, PCI DSS and more

Installation

Navigate to our Developer Documentation to install and start working with Virgil PureKit.

Resources

License

This library is released under the 3-clause BSD License.

Support

Our developer support team is here to help you. Find out more information at our Help Center.

You can find us on Twitter or send an email to our support team support@VirgilSecurity.com.

Also, get extra help from our support team on Slack.

Documentation

Index

Constants

View Source 
const (
	NmsPrefix       = "NM"
	BuppkPrefix     = "BU"
	SecretKeyPrefix = "SK"
	PublicKeyPrefix = "PK"
)
View Source 
const (
	DefaultGrantTTL = time.Hour
)
View Source 
const DerivedSecretLength = 44
View Source 
const NonrotatableMasterSecretLength = 32
View Source 
const RecoverPwdAlias = "RECOVERY_PASSWORD"

Variables

View Source 
var (
	ErrInvalidPassword = errors.New("invalid password")
	ErrNoAccess        = errors.New("no access")
	ErrGrantKeyExpired = errors.New("grant key expired")
)

ErrInvalidPassword is returned when protocol determines validation failure

Functions

This section is empty.

Types

type AuthResult 

type AuthResult struct {
	Grant          *models.PureGrant
	EncryptedGrant string
}

type Context 

type Context struct {
	Crypto              *crypto.Crypto
	Version             uint32
	UpdateToken         *Credentials
	PublicKey           *Credentials
	SecretKey           *Credentials
	Buppk               crypto.PublicKey
	Storage             storage.PureStorage
	PheClient           *clients.PheClient
	KmsClient           *clients.KmsClient
	NonRotatableSecrets *NonRotatableSecrets
	ExternalPublicKeys  map[string][]crypto.PublicKey
	AppToken            string
}

Context holds & validates protocol input parameters

func CreateCloudContext 

func CreateCloudContext(at, nm, bu, sk, pk string,
	externalPublicKeys map[string][]string,
	pheServiceAddress,
	pureServiceAddress,
	kmsServiceAddress string) (*Context, error)

func CreateContext 

func CreateContext(c *crypto.Crypto,
	at, nm, bu, sk, pk string,
	pureStorage storage.PureStorage,
	externalPublicKeys map[string][]string,
	pheServerAddress, kmsServerAddress string) (*Context, error)

CreateContext validates input parameters and prepares them for being used in Protocol

func CreateDefaultCloudContext 

func CreateDefaultCloudContext(at, nm, bu, sk, pk string,
	externalPublicKeys map[string][]string) (*Context, error)

func (*Context) SetUpdateToken 

func (c *Context) SetUpdateToken(updateToken string) error

type Credentials 

type Credentials struct {
	Payload1, Payload2, Payload3 []byte
	Version                      uint32
}

func ParseCredentials 

func ParseCredentials(prefix, creds string, versioned bool, numPayloads int) (*Credentials, error)

type DeserializedEncryptedGrant 

type DeserializedEncryptedGrant struct {
	EncryptedGrant       *protos.EncryptedGrant
	EncryptedGrantHeader *protos.EncryptedGrantHeader
}

type KmsEncryptedData 

type KmsEncryptedData struct {
	Wrap, Blob []byte
}

type KmsManager 

type KmsManager struct {
	CurrentVersion     uint32
	PureCrypto         *PureCrypto
	PwdCurrentClient   *phe.UokmsClient
	PwdPreviousClient  *phe.UokmsClient
	GrantCurrentClient *phe.UokmsClient

	HTTPKmsClient    *clients.KmsClient
	PwdKmsRotation   *phe.UokmsWrapRotation
	GrantKmsRotation *phe.UokmsWrapRotation
	// contains filtered or unexported fields
}

func NewKmsManager 

func NewKmsManager(context *Context) (*KmsManager, error)

func (*KmsManager) GenerateGrantKeyEncryptionData 

func (k *KmsManager) GenerateGrantKeyEncryptionData(grantKey, header []byte) (*KmsEncryptedData, error)

func (*KmsManager) GeneratePwdRecoveryData 

func (k *KmsManager) GeneratePwdRecoveryData(passwordHash []byte) (*KmsEncryptedData, error)

func (*KmsManager) GetGrantClient 

func (k *KmsManager) GetGrantClient(kmsVersion uint32) (*phe.UokmsClient, error)

func (*KmsManager) GetPwdClient 

func (k *KmsManager) GetPwdClient(kmsVersion uint32) (*phe.UokmsClient, error)

func (*KmsManager) PerformGrantRotation 

func (k *KmsManager) PerformGrantRotation(wrap []byte) ([]byte, error)

func (*KmsManager) PerformPwdRotation 

func (k *KmsManager) PerformPwdRotation(wrap []byte) ([]byte, error)

func (*KmsManager) RecoverGrant 

func (k *KmsManager) RecoverGrant(grant *models.GrantKey, header []byte) ([]byte, error)

func (*KmsManager) RecoverGrantKey 

func (k *KmsManager) RecoverGrantKey(grantKey *models.GrantKey, header []byte) ([]byte, error)

func (*KmsManager) RecoverGrantKeySecret 

func (k *KmsManager) RecoverGrantKeySecret(grantKey *models.GrantKey) ([]byte, error)

func (*KmsManager) RecoverPwd 

func (k *KmsManager) RecoverPwd(record *models.UserRecord) ([]byte, error)

func (*KmsManager) RecoverPwdSecret 

func (k *KmsManager) RecoverPwdSecret(record *models.UserRecord) ([]byte, error)

type NonRotatableSecrets 

type NonRotatableSecrets struct {
	Vksp, Oksp crypto.PrivateKey
}

func GenerateNonRotatableSecrets 

func GenerateNonRotatableSecrets(c *crypto.Crypto, masterSecret []byte) (*NonRotatableSecrets, error)

type PheManager 

type PheManager struct {
	Crypto         *crypto.Crypto
	CurrentVersion uint32
	UpdateToken    []byte
	CurrentClient  *phe.PheClient
	PreviousClient *phe.PheClient
	HttpClient     *clients.PheClient
}

func NewPheManager 

func NewPheManager(context *Context) (*PheManager, error)

func (*PheManager) ComputePheKey 

func (p *PheManager) ComputePheKey(record *models.UserRecord, passwordHash []byte) (key []byte, err error)

func (*PheManager) GetEnrollment 

func (p *PheManager) GetEnrollment(passwordHash []byte) (record, key []byte, err error)

func (*PheManager) GetPheClient 

func (p *PheManager) GetPheClient(pheVersion uint32) (*phe.PheClient, error)

func (*PheManager) PerformRotation 

func (p *PheManager) PerformRotation(record []byte) ([]byte, error)

type Pure 

type Pure struct {
	CurrentVersion     uint32
	PureCrypto         *PureCrypto
	Storage            storage.PureStorage
	Buppk              crypto.PublicKey
	Oskp               crypto.PrivateKey
	ExternalPublicKeys map[string][]crypto.PublicKey
	PheManager         *PheManager
	KmsManager         *KmsManager
}

func NewPure 

func NewPure(context *Context) (*Pure, error)

func (*Pure) AssignRole 

func (p *Pure) AssignRole(roleName string, publicKeyID []byte, rskData []byte, userIds ...string) error

func (*Pure) AssignRoleWithGrant 

func (p *Pure) AssignRoleWithGrant(roleName string, grant *models.PureGrant, userIds ...string) error

func (*Pure) AuthenticateUser 

func (p *Pure) AuthenticateUser(userID, password string, sessionParams *SessionParameters) (*AuthResult, error)

func (*Pure) ChangeUserPassword 

func (p *Pure) ChangeUserPassword(userID, oldPassword, newPassword string) error

func (*Pure) ChangeUserPasswordWithGrant 

func (p *Pure) ChangeUserPasswordWithGrant(grant *models.PureGrant, newPassword string) error

func (*Pure) CreateRole 

func (p *Pure) CreateRole(roleName string, userIds ...string) error

func (*Pure) CreateUserGrantAsAdmin 

func (p *Pure) CreateUserGrantAsAdmin(userID string, bupsk crypto.PrivateKey, ttl time.Duration) (*models.PureGrant, error)

func (*Pure) Decrypt 

func (p *Pure) Decrypt(grant *models.PureGrant, ownerUserID, dataID string, ciphertext []byte) ([]byte, error)

func (*Pure) DecryptGrantFromUser 

func (p *Pure) DecryptGrantFromUser(encryptedGrant string) (*models.PureGrant, error)

func (*Pure) DecryptWithKey 

func (p *Pure) DecryptWithKey(privateKey crypto.PrivateKey, ownerUserID, dataID string, ciphertext []byte) ([]byte, error)

func (*Pure) DeleteKey 

func (p *Pure) DeleteKey(userID, dataID string) error

func (*Pure) DeleteUser 

func (p *Pure) DeleteUser(userID string, cascade bool) error

func (*Pure) Encrypt 

func (p *Pure) Encrypt(userID, dataID string, plaintext []byte) ([]byte, error)

func (*Pure) EncryptGeneral 

func (p *Pure) EncryptGeneral(
	userID, dataID string,
	otherUserIDs []string,
	roleNames []string,
	publicKeys []crypto.PublicKey,
	plainText []byte) ([]byte, error)

nolint: golint,gocyclo,gocritic

func (*Pure) InvalidateEncryptedUserGrant 

func (p *Pure) InvalidateEncryptedUserGrant(encryptedGrant string) error

func (*Pure) PerformRotation 

func (p *Pure) PerformRotation() (*RotationResults, error)

func (*Pure) RecoverUser 

func (p *Pure) RecoverUser(userID, newPassword string) error

func (*Pure) RegisterUser 

func (p *Pure) RegisterUser(userID, password string) error

func (*Pure) ResetUser 

func (p *Pure) ResetUser(userID, newPassword string, cascade bool) error

func (*Pure) Share 

func (p *Pure) Share(grant *models.PureGrant, dataID string, otherUserIds []string, publicKeys []crypto.PublicKey) error

func (*Pure) ShareToRole 

func (p *Pure) ShareToRole(grant *models.PureGrant, dataID string, roleName string) error

func (*Pure) ShareToRoles 

func (p *Pure) ShareToRoles(grant *models.PureGrant, dataID string, roleNames []string) error

func (*Pure) UnassignRole 

func (p *Pure) UnassignRole(roleName string, userIds ...string) error

func (*Pure) Unshare 

func (p *Pure) Unshare(ownerUserID, dataID string, otherUserIDs []string, publicKeys []crypto.PublicKey) error

type PureCrypto 

type PureCrypto struct {
	Crypto *crypto.Crypto
	// contains filtered or unexported fields
}

func NewPureCrypto 

func NewPureCrypto(crypto *crypto.Crypto) *PureCrypto

func (*PureCrypto) AddRecipientsToCellKey 

func (p *PureCrypto) AddRecipientsToCellKey(cms []byte, privateKey crypto.PrivateKey, publicKeys []crypto.PublicKey) ([]byte, error)

func (*PureCrypto) ComputePasswordHash 

func (p *PureCrypto) ComputePasswordHash(password string) ([]byte, error)

func (*PureCrypto) ComputeSymmetricKeyId 

func (p *PureCrypto) ComputeSymmetricKeyId(key []byte) ([]byte, error)

func (*PureCrypto) DecryptBackup 

func (p *PureCrypto) DecryptBackup(data []byte, decryptKey crypto.PrivateKey, verifyKey crypto.PublicKey) ([]byte, error)

func (*PureCrypto) DecryptCellKey 

func (p *PureCrypto) DecryptCellKey(data *PureCryptoData, privateKey crypto.PrivateKey, verifyingKey crypto.PublicKey) ([]byte, error)

func (*PureCrypto) DecryptData 

func (p *PureCrypto) DecryptData(data []byte, decryptionKey crypto.PrivateKey, verificationKey crypto.PublicKey) ([]byte, error)

func (*PureCrypto) DecryptRolePrivateKey 

func (p *PureCrypto) DecryptRolePrivateKey(data []byte, decryptKey crypto.PrivateKey, verifyKey crypto.PublicKey) ([]byte, error)

func (*PureCrypto) DecryptSymmetricWithNewNonce 

func (p *PureCrypto) DecryptSymmetricWithNewNonce(ciphertext, ad, key []byte) ([]byte, error)

func (*PureCrypto) DecryptSymmetricWithOneTimeKey 

func (p *PureCrypto) DecryptSymmetricWithOneTimeKey(ciphertext, ad, key []byte) ([]byte, error)

func (*PureCrypto) DeleteRecipientsFromCellKey 

func (p *PureCrypto) DeleteRecipientsFromCellKey(cms []byte, publicKeys []crypto.PublicKey) ([]byte, error)

func (*PureCrypto) EncryptCellKey 

func (p *PureCrypto) EncryptCellKey(
	plaintext []byte,
	recipients []crypto.PublicKey,
	signingKey crypto.PrivateKey) (*PureCryptoData, error)

func (*PureCrypto) EncryptData 

func (p *PureCrypto) EncryptData(data []byte, signingKey crypto.PrivateKey, recipients ...crypto.PublicKey) ([]byte, error)

func (*PureCrypto) EncryptForBackup 

func (p *PureCrypto) EncryptForBackup(data []byte, encryptKey crypto.PublicKey, signingKey crypto.PrivateKey) ([]byte, error)

func (*PureCrypto) EncryptRolePrivateKey 

func (p *PureCrypto) EncryptRolePrivateKey(data []byte, encryptKey crypto.PublicKey, signingKey crypto.PrivateKey) ([]byte, error)

func (*PureCrypto) EncryptSymmetricWithNewNonce 

func (p *PureCrypto) EncryptSymmetricWithNewNonce(plaintext, ad, key []byte) ([]byte, error)

func (*PureCrypto) EncryptSymmetricWithOneTimeKey 

func (p *PureCrypto) EncryptSymmetricWithOneTimeKey(plaintext, ad, key []byte) ([]byte, error)

func (*PureCrypto) ExportPrivateKey 

func (p *PureCrypto) ExportPrivateKey(key crypto.PrivateKey) ([]byte, error)

func (*PureCrypto) ExportPublicKey 

func (p *PureCrypto) ExportPublicKey(key crypto.PublicKey) ([]byte, error)

func (*PureCrypto) ExtractPublicKeysIdsFromCellKey 

func (p *PureCrypto) ExtractPublicKeysIdsFromCellKey(cms []byte) ([][]byte, error)

func (*PureCrypto) GenerateCellKey 

func (p *PureCrypto) GenerateCellKey() (crypto.PrivateKey, error)

func (*PureCrypto) GenerateRoleKey 

func (p *PureCrypto) GenerateRoleKey() (crypto.PrivateKey, error)

func (*PureCrypto) GenerateSymmetricOneTimeKey 

func (p *PureCrypto) GenerateSymmetricOneTimeKey() ([]byte, error)

func (*PureCrypto) GenerateUserKey 

func (p *PureCrypto) GenerateUserKey() (crypto.PrivateKey, error)

func (*PureCrypto) ImportPrivateKey 

func (p *PureCrypto) ImportPrivateKey(data []byte) (crypto.PrivateKey, error)

func (*PureCrypto) ImportPublicKey 

func (p *PureCrypto) ImportPublicKey(data []byte) (crypto.PublicKey, error)

type PureCryptoData 

type PureCryptoData struct {
	Cms, Body []byte
}

type RotationResults 

type RotationResults struct {
	UsersRotated  uint64
	GrantsRotated uint64
}

type SessionParameters 

type SessionParameters struct {
	SessionID string
	TTL       time.Duration
}

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