paillier

package

v0.0.4 Latest Latest Go to latest Published: Jul 12, 2023 License: MIT Imports: 10 Imported by: 0

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const (
	ProofIters = 13
)

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var (
	ErrMessageTooLong   = fmt.Errorf("the message is too large or < 0")
	ErrMessageMalFormed = fmt.Errorf("the message is mal-formed")
)

func GenerateKeyPair(ctx context.Context, modulusBitLen int, optionalConcurrency ...int) (privateKey *PrivateKey, publicKey *PublicKey, err error)

len is the length of the modulus (each prime = len / 2)

func GenerateXs(m int, k, N *big.Int, ecdsaPub *crypto2.ECPoint) []*big.Int

GenerateXs generates the challenges used in Paillier key Proof

func L(u, N *big.Int) *big.Int

type PrivateKey struct {
	PublicKey
	LambdaN,
	PhiN *big.Int // (p-1) * (q-1)
}

func (privateKey *PrivateKey) Decrypt(c *big.Int) (m *big.Int, err error)

func (privateKey *PrivateKey) Proof(k *big.Int, ecdsaPub *crypto2.ECPoint) Proof

type Proof [ProofIters]*big.Int

Proof uses the new GenerateXs method in GG18Spec (6)

func (pf Proof) Verify(pkN, k *big.Int, ecdsaPub *crypto2.ECPoint) (bool, error)

type PublicKey struct {
	N *big.Int
}

func (publicKey *PublicKey) AsInts() []*big.Int

AsInts returns the PublicKey serialised to a slice of *big.Int for hashing

func (publicKey *PublicKey) Encrypt(m *big.Int) (c *big.Int, err error)

func (publicKey *PublicKey) EncryptAndReturnRandomness(m *big.Int) (c *big.Int, x *big.Int, err error)

func (publicKey *PublicKey) Gamma() *big.Int

Gamma returns N+1

func (publicKey *PublicKey) HomoAdd(c1, c2 *big.Int) (*big.Int, error)

func (publicKey *PublicKey) HomoMult(m, c1 *big.Int) (*big.Int, error)

func (publicKey *PublicKey) NSquare() *big.Int