sign

package

v0.1.0 Latest Latest Go to latest Published: Jul 27, 2025 License: Apache-2.0 Imports: 12 Imported by: 3

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/luxfi/ringtail

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Documentation ¶

Index ¶

Variables
func ApplyConfig(cfg *config.SignatureParams)
func CheckL2Norm(r *ring.Ring, Delta structs.Vector[ring.Poly], z structs.Vector[ring.Poly]) bool
func FullRankCheck(D structs.Matrix[ring.Poly], r *ring.Ring) bool
func Gen(r *ring.Ring, r_xi *ring.Ring, uniformSampler *ring.UniformSampler, ...) (structs.Matrix[ring.Poly], map[int]structs.Vector[ring.Poly], map[int][][]byte, ...)
func LocalRun(x int)
func Verify(r *ring.Ring, r_xi *ring.Ring, r_nu *ring.Ring, z structs.Vector[ring.Poly], ...) bool
type Party
- func NewParty(id int, r *ring.Ring, r_xi *ring.Ring, r_nu *ring.Ring, ...) *Party

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	M                      = 8
	N                      = 7
	Dbar                   = 48
	B                      = 430070539612332.205811372782969  // 2^48.61156663661591
	Bsquare                = "184960669042442604975662780477" // B^2
	Kappa                  = 23
	LogN                   = 8
	SigmaE                 = 6.108187070284607
	BoundE                 = SigmaE * 2
	SigmaStar              = 172852667880.2713189548230532887787 // 2^37.33075191469097
	BoundStar              = SigmaStar * 2
	SigmaU                 = 163961331.5239387
	BoundU                 = SigmaU * 2
	KeySize                = 32              // 256 bits
	Q               uint64 = 0x1000000004A01 // 48-bit NTT-friendly prime
	QNu             uint64 = 0x80000
	QXi             uint64 = 0x40000
	TrustedDealerID        = 0
	CombinerID             = 1
	Xi                     = 30
	Nu                     = 29
	EtaEpsilon             = 2.650104
)

PARAMETERS - Default values, can be overridden by configuration

View Source

var K int

View Source

var Threshold int

Functions ¶

func ApplyConfig ¶

func ApplyConfig(cfg *config.SignatureParams)

ApplyConfig updates parameters from configuration

func CheckL2Norm ¶

func CheckL2Norm(r *ring.Ring, Delta structs.Vector[ring.Poly], z structs.Vector[ring.Poly]) bool

CheckL2Norm checks if the L2 norm of the vector of Delta is less than or equal to Bsquare

func FullRankCheck ¶

func FullRankCheck(D structs.Matrix[ring.Poly], r *ring.Ring) bool

FullRankCheck checks if the given matrix is full-rank, ignoring the first column

func Gen ¶

func Gen(r *ring.Ring, r_xi *ring.Ring, uniformSampler *ring.UniformSampler, trustedDealerKey []byte, lagrangeCoefficients structs.Vector[ring.Poly]) (structs.Matrix[ring.Poly], map[int]structs.Vector[ring.Poly], map[int][][]byte, map[int]map[int][]byte, structs.Vector[ring.Poly])

Gen generates the secret shares, seeds, MAC keys, and the public parameter b

func LocalRun ¶

func LocalRun(x int)

main function orchestrates the threshold signature protocol

func Verify ¶

func Verify(r *ring.Ring, r_xi *ring.Ring, r_nu *ring.Ring, z structs.Vector[ring.Poly], A structs.Matrix[ring.Poly], mu string, bTilde structs.Vector[ring.Poly], c ring.Poly, roundedDelta structs.Vector[ring.Poly]) bool

Verify verifies the correctness of the signature

Types ¶

type Party ¶

type Party struct {
	ID             int
	Ring           *ring.Ring
	RingXi         *ring.Ring
	RingNu         *ring.Ring
	UniformSampler *ring.UniformSampler
	SkShare        structs.Vector[ring.Poly]
	Seed           map[int][][]byte
	R              structs.Matrix[ring.Poly]
	C              ring.Poly
	H              structs.Vector[ring.Poly]
	Lambda         ring.Poly
	D              structs.Matrix[ring.Poly]
	MACKeys        map[int][]byte
	MACs           map[int][]byte
}

Party struct holds all state and methods for a party in the protocol

func NewParty ¶

func NewParty(id int, r *ring.Ring, r_xi *ring.Ring, r_nu *ring.Ring, sampler *ring.UniformSampler) *Party

NewParty initializes a new Party instance

func (*Party) SignFinalize ¶

func (party *Party) SignFinalize(z map[int]structs.Vector[ring.Poly], A structs.Matrix[ring.Poly], bTilde structs.Vector[ring.Poly]) (ring.Poly, structs.Vector[ring.Poly], structs.Vector[ring.Poly])

SignFinalize finalizes the signature

func (*Party) SignRound1 ¶

func (party *Party) SignRound1(A structs.Matrix[ring.Poly], sid int, PRFKey []byte, T []int) (structs.Matrix[ring.Poly], map[int][]byte)

SignRound1 performs the first round of signing

func (*Party) SignRound2 ¶

func (party *Party) SignRound2(A structs.Matrix[ring.Poly], bTilde structs.Vector[ring.Poly], DSum structs.Matrix[ring.Poly], sid int, mu string, T []int, PRFKey []byte, hash []byte) structs.Vector[ring.Poly]

SignRound2 performs the second round of signing

func (*Party) SignRound2Preprocess ¶

func (party *Party) SignRound2Preprocess(A structs.Matrix[ring.Poly], b structs.Vector[ring.Poly], D map[int]structs.Matrix[ring.Poly], MACs map[int]map[int][]byte, sid int, T []int) (bool, structs.Matrix[ring.Poly], []byte)

SignRound2Preprocess verifies the MACs received in round 1 and performs the minimum eigenvalue check

Source Files ¶

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