pedersen

package

v0.4.1 Latest Latest Go to latest Published: Feb 21, 2024 License: Apache-2.0 Imports: 5 Imported by: 0

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Repository

github.com/MixinNetwork/multi-party-sig

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Documentation ¶

Index ¶

func ValidateParameters(n *saferith.Modulus, s, t *saferith.Nat) error
type Error
- func (e Error) Error() string
type Parameters
- func New(n *arith.Modulus, s, t *saferith.Nat) *Parameters

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func ValidateParameters ¶

func ValidateParameters(n *saferith.Modulus, s, t *saferith.Nat) error

ValidateParameters check n, s and t, and returns an error if any of the following is true: - n, s, or t is nil. - s, t are not in [1, …,n-1]. - s, t are not coprime to N. - s = t.

Types ¶

type Error ¶

type Error string

const (
	ErrNilFields    Error = "contains nil field"
	ErrSEqualT      Error = "S cannot be equal to T"
	ErrNotValidModN Error = "S and T must be in [1,…,N-1] and coprime to N"
)

func (Error) Error ¶

func (e Error) Error() string

type Parameters ¶

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

func New ¶

func New(n *arith.Modulus, s, t *saferith.Nat) *Parameters

New returns a new set of Pedersen parameters. Assumes ValidateParameters(n, s, t) returns nil.

func (Parameters) Commit ¶

func (p Parameters) Commit(x, y *saferith.Int) *saferith.Nat

Commit computes sˣ tʸ (mod N)

x and y are taken as saferith.Int, because we want to keep these values in secret, in general. The commitment produced, on the other hand, hides their values, and can be safely shared.

func (Parameters) Domain ¶

func (Parameters) Domain() string

Domain implements hash.WriterToWithDomain, and separates this type within hash.Hash.

func (Parameters) N ¶

func (p Parameters) N() *saferith.Modulus

N = p•q, p ≡ q ≡ 3 mod 4.

func (Parameters) NArith ¶

func (p Parameters) NArith() *arith.Modulus

N, but as an arith modulus, which is sometimes useful

func (Parameters) S ¶

func (p Parameters) S() *saferith.Nat

S = r² mod N.

func (Parameters) T ¶

func (p Parameters) T() *saferith.Nat

T = Sˡ mod N.

func (Parameters) Verify ¶

func (p Parameters) Verify(a, b, e *saferith.Int, S, T *saferith.Nat) bool

Verify returns true if sᵃ tᵇ ≡ S Tᵉ (mod N).

func (*Parameters) WriteTo ¶

func (p *Parameters) WriteTo(w io.Writer) (int64, error)

WriteTo implements io.WriterTo and should be used within the hash.Hash function.

Source Files ¶

View all Source files

pedersen.go

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