umbral

Documentation

Index

• Constants
• func DecryptDirect(cxt *Context, capsule *Capsule, privKey *UmbralFieldElement, cipherText []byte) []byte
• func DecryptFragments(cxt *Context, capsule *Capsule, reKeyFrags []*CFrag, ...) []byte
• type CFrag
  • func ReEncapsulate(frag *KFrag, cap *Capsule) *CFrag
• type Capsule
  • func Encrypt(cxt *Context, pubKey *UmbralCurveElement, plainText []byte) ([]byte, *Capsule)
• type Context
  • func MakeDefaultContext() *Context
  • func (cxt *Context) GetGen() *field.CurveElement
  • func (cxt *Context) GetOrder() *big.Int
  • func (cxt *Context) MulGen(x *field.ModInt) *UmbralCurveElement
  • func (cxt *Context) MulU(x *field.ModInt) *UmbralCurveElement
• type DEM
  • func MakeDEM(key []byte) *DEM
• type KFrag
  • func SplitReKey(cxt *Context, privA *UmbralFieldElement, pubB *UmbralCurveElement, ...) []*KFrag
• type ReEncCapsule
• type UmbralCurveElement
  • func (key *UmbralCurveElement) Add(in *UmbralCurveElement) *UmbralCurveElement
  • func (pk *UmbralCurveElement) Mul(sk *UmbralFieldElement) *UmbralCurveElement
  • func (key *UmbralCurveElement) MulInt(mi *field.ModInt) *UmbralCurveElement
• type UmbralFieldElement
  • func GenPrivateKey(cxt *Context) *UmbralFieldElement
  • func MakePrivateKey(cxt *Context, mi *field.ModInt) *UmbralFieldElement
  • func (key *UmbralFieldElement) GetPublicKey(cxt *Context) *UmbralCurveElement

Constants

const SECRET_BOX_KEY_SIZE = 32

Functions

func DecryptDirect

func DecryptDirect(cxt *Context, capsule *Capsule, privKey *UmbralFieldElement, cipherText []byte) []byte

func DecryptFragments

func DecryptFragments(cxt *Context, capsule *Capsule, reKeyFrags []*CFrag, privKey *UmbralFieldElement, origPubKey *UmbralCurveElement, cipherText []byte) []byte

Types

type CFrag

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

func ReEncapsulate

func ReEncapsulate(frag *KFrag, cap *Capsule) *CFrag

type Capsule

type Capsule struct {
	E *UmbralCurveElement
	V *UmbralCurveElement
	// contains filtered or unexported fields
}

func Encrypt

func Encrypt(cxt *Context, pubKey *UmbralCurveElement, plainText []byte) ([]byte, *Capsule)

type Context

type Context struct {
	U *field.CurveElement
	// contains filtered or unexported fields
}

func MakeDefaultContext

func MakeDefaultContext() *Context

func (*Context) GetGen

func (cxt *Context) GetGen() *field.CurveElement

func (*Context) GetOrder

func (cxt *Context) GetOrder() *big.Int

func (*Context) MulGen

func (cxt *Context) MulGen(x *field.ModInt) *UmbralCurveElement

func (*Context) MulU

func (cxt *Context) MulU(x *field.ModInt) *UmbralCurveElement

type DEM

type DEM struct {
	cipher.AEAD
	// contains filtered or unexported fields
}

func MakeDEM

func MakeDEM(key []byte) *DEM

type KFrag

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

func SplitReKey

func SplitReKey(cxt *Context, privA *UmbralFieldElement, pubB *UmbralCurveElement, threshold int, numSplits int) []*KFrag

type ReEncCapsule

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

type UmbralCurveElement

type UmbralCurveElement struct {
	field.CurveElement
}

func (*UmbralCurveElement) Add

func (key *UmbralCurveElement) Add(in *UmbralCurveElement) *UmbralCurveElement

func (*UmbralCurveElement) Mul

func (pk *UmbralCurveElement) Mul(sk *UmbralFieldElement) *UmbralCurveElement

func (*UmbralCurveElement) MulInt

func (key *UmbralCurveElement) MulInt(mi *field.ModInt) *UmbralCurveElement

type UmbralFieldElement

type UmbralFieldElement struct {
	field.ZElement
}

func GenPrivateKey

func GenPrivateKey(cxt *Context) *UmbralFieldElement

func MakePrivateKey

func MakePrivateKey(cxt *Context, mi *field.ModInt) *UmbralFieldElement

func (*UmbralFieldElement) GetPublicKey

func (key *UmbralFieldElement) GetPublicKey(cxt *Context) *UmbralCurveElement