sdk

package module
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 Go to latest Published: Apr 28, 2024 License: BSD-3-Clause-Clear Imports: 40 Imported by: 5

README

OpenTDF Data Security SDK

A Go implementation of the OpenTDF protocol, and access library for services included in the Data Security Platform.

Note: if you are consuming the SDK as a submodule you may need to add replace directives as follows:

replace (
  github.com/opentdf/platform/service => ./opentdf/service
	github.com/opentdf/platform/lib/fixtures => ./opentdf/lib/fixtures
	github.com/opentdf/platform/protocol/go => ./opentdf/protocol/go
	github.com/opentdf/platform/lib/ocrypto => ./opentdf/lib/ocrypto
	github.com/opentdf/platform/sdk => ./opentdf/sdk
	github.com/opentdf/platform/service => ./opentdf/service
)

Quick Start of the Go SDK

package main

import "fmt"
import "bytes"
import "io"
import "os"
import "strings"
import "github.com/opentdf/platform/sdk"


func main() {
  s, _ := sdk.New(
    sdk.WithAuth(mtls.NewGRPCAuthorizer(creds) /* or OIDC or whatever */),
    sdk.WithDataSecurityConfig(/* attribute schemas, kas multi-attribute mapping */),
  )

  plaintext := strings.NewReader("Hello, world!")
  var ciphertext bytes.Buffer
  _, err := s.CreateTDF(
    ciphertext,
    plaintext,
    sdk.WithAttributes("https://example.com/attr/Classification/value/Open"),
  )
  if err != nil {
    panic(err)
  }

  fmt.Printf("Ciphertext is %s bytes long", ciphertext.Len())

  ct2 := make([]byte, ciphertext.Len())
  copy(ct2, ciphertext.Bytes())
  r, err := s.NewTDFReader(bytes.NewReader(ct2))
  f, err := os.Create("output.txt")
  if err != nil {
    panic(err)
  }
  io.Copy(f, r)
}

Development

To test, run

go test ./... -short -race -cover

Documentation

Index

Constants

View Source 
const (
	ErrGrpcDialFailed = Error("failed to dial grpc endpoint")
	ErrShutdownFailed = Error("failed to shutdown sdk")
)
View Source 
const (
	JSONFormat = iota
	XMLFormat
)
View Source 
const (
	HS256 = iota
	GMAC
)
View Source 
const (
	ErrNanoTdfRead = Error("nanotdf read error")
)

Variables

This section is empty.

Functions

func ReadNanoTDFHeader 

func ReadNanoTDFHeader(reader io.Reader) (*nanoTdf, error)

Types

type Assertion 

type Assertion struct {
}

type AuthConfig 

type AuthConfig struct {
	// contains filtered or unexported fields
}

func NewAuthConfig 

func NewAuthConfig() (*AuthConfig, error)

NewAuthConfig Create a new instance of authConfig

func NewOIDCAuthConfig 

func NewOIDCAuthConfig(ctx context.Context, host, realm, clientID, clientSecret, subjectToken string) (*AuthConfig, error)

type EncryptedMetadata 

type EncryptedMetadata struct {
	Cipher string `json:"ciphertext"`
	Iv     string `json:"iv"`
}

type EncryptionInformation 

type EncryptionInformation struct {
	KeyAccessType        string      `json:"type"`
	Policy               string      `json:"policy"`
	KeyAccessObjs        []KeyAccess `json:"keyAccess"`
	Method               Method      `json:"method"`
	IntegrityInformation `json:"integrityInformation"`
}

type Error 

type Error string

func (Error) Error 

func (c Error) Error() string

type IDPAccessTokenSource 

type IDPAccessTokenSource struct {
	// contains filtered or unexported fields
}

Credentials that allow us to connect to an IDP and obtain an access token that is bound to a DPoP key

func NewIDPAccessTokenSource 

func NewIDPAccessTokenSource(
	credentials oauth.ClientCredentials, idpTokenEndpoint string, scopes []string) (*IDPAccessTokenSource, error)

func (*IDPAccessTokenSource) AccessToken 

func (t *IDPAccessTokenSource) AccessToken() (auth.AccessToken, error)

use a pointer receiver so that the token state is shared

func (*IDPAccessTokenSource) MakeToken 

func (t *IDPAccessTokenSource) MakeToken(tokenMaker func(jwk.Key) ([]byte, error)) ([]byte, error)

type IDPTokenExchangeTokenSource 

type IDPTokenExchangeTokenSource struct {
	IDPAccessTokenSource
	oauth.TokenExchangeInfo
}

func NewIDPTokenExchangeTokenSource 

func NewIDPTokenExchangeTokenSource(exchangeInfo oauth.TokenExchangeInfo, credentials oauth.ClientCredentials, idpTokenEndpoint string, scopes []string) (*IDPTokenExchangeTokenSource, error)

func (IDPTokenExchangeTokenSource) AccessToken 

func (i IDPTokenExchangeTokenSource) AccessToken() (auth.AccessToken, error)

func (IDPTokenExchangeTokenSource) MakeToken 

func (i IDPTokenExchangeTokenSource) MakeToken(keyMaker func(jwk.Key) ([]byte, error)) ([]byte, error)

type IntegrityAlgorithm 

type IntegrityAlgorithm = int

type IntegrityInformation 

type IntegrityInformation struct {
	RootSignature           `json:"rootSignature"`
	SegmentHashAlgorithm    string    `json:"segmentHashAlg"`
	DefaultSegmentSize      int64     `json:"segmentSizeDefault"`
	DefaultEncryptedSegSize int64     `json:"encryptedSegmentSizeDefault"`
	Segments                []Segment `json:"segments"`
}

type KASClient 

type KASClient struct {
	// contains filtered or unexported fields
}

type KASInfo 

type KASInfo struct {
	// URL of the KAS server“
	URL string
	// Public key can be empty. If it is empty, the public key will be fetched from the KAS server.
	PublicKey string
}

KASInfo contains Key Access Server information.

type KeyAccess 

type KeyAccess struct {
	KeyType           string `json:"type"`
	KasURL            string `json:"url"`
	Protocol          string `json:"protocol"`
	WrappedKey        string `json:"wrappedKey"`
	PolicyBinding     string `json:"policyBinding"`
	EncryptedMetadata string `json:"encryptedMetadata,omitempty"`
}

type Manifest 

type Manifest struct {
	EncryptionInformation `json:"encryptionInformation"`
	Payload               `json:"payload"`
}

type Method 

type Method struct {
	Algorithm    string `json:"algorithm"`
	IV           string `json:"iv"`
	IsStreamable bool   `json:"isStreamable"`
}

type Option 

type Option func(*config)

func WithAuthConfig 

func WithAuthConfig(authConfig AuthConfig) Option

temporary option to allow the for token exchange and the use of REST-ful KASs. this will likely change as we make these options more robust

func WithClientCredentials 

func WithClientCredentials(clientID, clientSecret string, scopes []string) Option

WithClientCredentials returns an Option that sets up authentication with client credentials.

func WithCustomAuthorizationConnection 

func WithCustomAuthorizationConnection(conn *grpc.ClientConn) Option

func WithCustomPolicyConnection 

func WithCustomPolicyConnection(conn *grpc.ClientConn) Option

func WithExtraDialOptions 

func WithExtraDialOptions(dialOptions ...grpc.DialOption) Option

func WithInsecureConn 

func WithInsecureConn() Option

WithInsecureConn returns an Option that sets up an http connection.

func WithTokenEndpoint 

func WithTokenEndpoint(tokenEndpoint string) Option

When we implement service discovery using a .well-known endpoint this option may become deprecated

func WithTokenExchange 

func WithTokenExchange(subjectToken string, audience []string) Option

WithTokenExchange specifies that the SDK should obtain its access token by exchanging the given token for a new one

type Payload 

type Payload struct {
	Type        string `json:"type"`
	URL         string `json:"url"`
	Protocol    string `json:"protocol"`
	MimeType    string `json:"mimeType"`
	IsEncrypted bool   `json:"isEncrypted"`
}

type PolicyBody 

type PolicyBody interface {
	// contains filtered or unexported methods
}

type PolicyObject 

type PolicyObject struct {
	UUID string `json:"uuid"`
	Body struct {
		DataAttributes []attributeObject `json:"dataAttributes"`
		Dissem         []string          `json:"dissem"`
	} `json:"body"`
}

type Reader 

type Reader struct {
	// contains filtered or unexported fields
}

func (*Reader) DataAttributes 

func (r *Reader) DataAttributes() ([]string, error)

DataAttributes return the data attributes present in tdf.

func (*Reader) Manifest 

func (r *Reader) Manifest() Manifest

func (*Reader) Policy 

func (r *Reader) Policy() (PolicyObject, error)

Policy returns a copy of the policy object in manifest, if it is valid. Otherwise, returns an error.

func (*Reader) Read 

func (r *Reader) Read(p []byte) (int, error)

Read reads up to len(p) bytes into p. It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. It returns an io.EOF error when the stream ends.

func (*Reader) ReadAt 

func (r *Reader) ReadAt(buf []byte, offset int64) (int, error)

ReadAt reads len(p) bytes into p starting at offset off in the underlying input source. It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. It returns an io.EOF error when the stream ends. NOTE: For larger tdf sizes use sdk.GetTDFPayload for better performance

func (*Reader) UnencryptedMetadata 

func (r *Reader) UnencryptedMetadata() ([]byte, error)

UnencryptedMetadata return decrypted metadata in manifest.

func (*Reader) WriteTo 

func (r *Reader) WriteTo(writer io.Writer) (int64, error)

WriteTo writes data to writer until there's no more data to write or when an error occurs. This implements the io.WriterTo interface.

type RequestBody 

type RequestBody struct {
	KeyAccess       `json:"keyAccess"`
	ClientPublicKey string `json:"clientPublicKey"`
	Policy          string `json:"policy"`
}

type RootSignature 

type RootSignature struct {
	Algorithm string `json:"alg"`
	Signature string `json:"sig"`
}

type SDK 

type SDK struct {
	Namespaces              namespaces.NamespaceServiceClient
	Attributes              attributes.AttributesServiceClient
	ResourceMapping         resourcemapping.ResourceMappingServiceClient
	SubjectMapping          subjectmapping.SubjectMappingServiceClient
	KeyAccessServerRegistry kasregistry.KeyAccessServerRegistryServiceClient
	Authorization           authorization.AuthorizationServiceClient
	// contains filtered or unexported fields
}

func New 

func New(platformEndpoint string, opts ...Option) (*SDK, error)

func (SDK) Close 

func (s SDK) Close() error

Close closes the underlying grpc.ClientConn.

func (SDK) Conn 

func (s SDK) Conn() *grpc.ClientConn

Conn returns the underlying grpc.ClientConn.

func (SDK) CreateTDF 

func (s SDK) CreateTDF(writer io.Writer, reader io.ReadSeeker, opts ...TDFOption) (*TDFObject, error)

CreateTDF reads plain text from the given reader and saves it to the writer, subject to the given options

func (SDK) LoadTDF 

func (s SDK) LoadTDF(reader io.ReadSeeker) (*Reader, error)

LoadTDF loads the tdf and prepare for reading the payload from TDF

type Segment 

type Segment struct {
	Hash          string `json:"hash"`
	Size          int64  `json:"segmentSize"`
	EncryptedSize int64  `json:"encryptedSegmentSize"`
}

type TDFConfig 

type TDFConfig struct {
	// contains filtered or unexported fields
}

TDFConfig Internal config struct for building TDF options.

func NewTDFConfig 

func NewTDFConfig(opt ...TDFOption) (*TDFConfig, error)

NewTDFConfig CreateTDF a new instance of tdf config.

type TDFFormat 

type TDFFormat = int

type TDFObject 

type TDFObject struct {
	// contains filtered or unexported fields
}

func (*TDFObject) Manifest 

func (t *TDFObject) Manifest() Manifest

type TDFOption 

type TDFOption func(*TDFConfig) error

func WithDataAttributes 

func WithDataAttributes(attributes ...string) TDFOption

WithDataAttributes appends the given data attributes to the bound policy

func WithKasInformation 

func WithKasInformation(kasInfoList ...KASInfo) TDFOption

WithKasInformation adds all the kas urls and their corresponding public keys that is required to create and read the tdf.

func WithMetaData 

func WithMetaData(metaData string) TDFOption

WithMetaData returns an Option that add metadata to TDF.

func WithSegmentSize 

func WithSegmentSize(size int64) TDFOption

WithSegmentSize returns an Option that set the default segment size to TDF.

Source Files

View all Source files

Directories

Path Synopsis
internal
archive
oauth

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