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562 lines
12 KiB
562 lines
12 KiB
package utils
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import (
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"errors"
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"fmt"
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"math/big"
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snark "github.com/arnaucube/go-snark"
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"github.com/arnaucube/go-snark/circuitcompiler"
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"github.com/arnaucube/go-snark/groth16"
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)
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// []*big.Int
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func ArrayBigIntToHex(b []*big.Int) []string {
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var o []string
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for i := 0; i < len(b); i++ {
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o = append(o, fmt.Sprintf("%x", b[i]))
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}
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return o
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}
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func ArrayHexToBigInt(s []string) ([]*big.Int, error) {
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var px []*big.Int
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for i := 0; i < len(s); i++ {
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param, ok := new(big.Int).SetString(s[i], 16)
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if !ok {
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return nil, errors.New("error parsing px from pxHex")
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}
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px = append(px, param)
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}
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return px, nil
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}
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// [3]*big.Int
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func Hex3ToBigInt(s [3]string) ([3]*big.Int, error) {
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var o [3]*big.Int
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for i := 0; i < len(s); i++ {
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param, ok := new(big.Int).SetString(s[i], 16)
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if !ok {
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return o, errors.New("error parsing [3]*big.Int from [3]string")
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}
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o[i] = param
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}
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return o, nil
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}
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func BigInt3ToHex(b [3]*big.Int) [3]string {
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var o [3]string
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o[0] = fmt.Sprintf("%x", b[0])
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o[1] = fmt.Sprintf("%x", b[1])
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o[2] = fmt.Sprintf("%x", b[2])
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return o
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}
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// [][3]*big.Int
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func Array3HexToBigInt(s [][3]string) ([][3]*big.Int, error) {
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var o [][3]*big.Int
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for i := 0; i < len(s); i++ {
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parsed, err := Hex3ToBigInt(s[i])
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if err != nil {
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return o, err
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}
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o = append(o, parsed)
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}
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return o, nil
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}
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func Array3BigIntToHex(b [][3]*big.Int) [][3]string {
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var o [][3]string
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for i := 0; i < len(b); i++ {
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o = append(o, BigInt3ToHex(b[i]))
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}
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return o
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}
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func Hex2ToBigInt(s [2]string) ([2]*big.Int, error) {
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var o [2]*big.Int
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for i := 0; i < len(s); i++ {
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param, ok := new(big.Int).SetString(s[i], 16)
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if !ok {
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return o, errors.New("error parsing [2]*big.Int from [2]string")
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}
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o[i] = param
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}
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return o, nil
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}
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// [3][2]*big.Int
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func Hex32ToBigInt(s [3][2]string) ([3][2]*big.Int, error) {
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var o [3][2]*big.Int
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var err error
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o[0], err = Hex2ToBigInt(s[0])
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if err != nil {
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return o, err
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}
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o[1], err = Hex2ToBigInt(s[1])
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if err != nil {
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return o, err
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}
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o[2], err = Hex2ToBigInt(s[2])
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if err != nil {
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return o, err
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}
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return o, nil
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}
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func BigInt32ToHex(b [3][2]*big.Int) [3][2]string {
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var o [3][2]string
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o[0][0] = fmt.Sprintf("%x", b[0][0])
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o[0][1] = fmt.Sprintf("%x", b[0][1])
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o[1][0] = fmt.Sprintf("%x", b[1][0])
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o[1][1] = fmt.Sprintf("%x", b[1][1])
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o[2][0] = fmt.Sprintf("%x", b[2][0])
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o[2][1] = fmt.Sprintf("%x", b[2][1])
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return o
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}
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// [][3][2]*big.Int
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func Array32HexToBigInt(s [][3][2]string) ([][3][2]*big.Int, error) {
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var o [][3][2]*big.Int
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for i := 0; i < len(s); i++ {
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parsed, err := Hex32ToBigInt(s[i])
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if err != nil {
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return o, err
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}
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o = append(o, parsed)
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}
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return o, nil
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}
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func Array32BigIntToHex(b [][3][2]*big.Int) [][3][2]string {
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var o [][3][2]string
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for i := 0; i < len(b); i++ {
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o = append(o, BigInt32ToHex(b[i]))
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}
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return o
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}
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// Setup
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type PkHex struct {
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G1T [][3]string
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A [][3]string
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B [][3][2]string
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C [][3]string
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Kp [][3]string
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Ap [][3]string
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Bp [][3]string
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Cp [][3]string
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Z []string
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}
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type VkHex struct {
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Vka [3][2]string
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Vkb [3]string
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Vkc [3][2]string
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IC [][3]string
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G1Kbg [3]string
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G2Kbg [3][2]string
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G2Kg [3][2]string
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Vkz [3][2]string
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}
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type SetupHex struct {
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Pk PkHex
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Vk VkHex
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}
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func SetupToHex(setup snark.Setup) SetupHex {
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var s SetupHex
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s.Pk.G1T = Array3BigIntToHex(setup.Pk.G1T)
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s.Pk.A = Array3BigIntToHex(setup.Pk.A)
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s.Pk.B = Array32BigIntToHex(setup.Pk.B)
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s.Pk.C = Array3BigIntToHex(setup.Pk.C)
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s.Pk.Kp = Array3BigIntToHex(setup.Pk.Kp)
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s.Pk.Ap = Array3BigIntToHex(setup.Pk.Ap)
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s.Pk.Bp = Array3BigIntToHex(setup.Pk.Bp)
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s.Pk.Cp = Array3BigIntToHex(setup.Pk.Cp)
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s.Pk.Z = ArrayBigIntToHex(setup.Pk.Z)
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s.Vk.Vka = BigInt32ToHex(setup.Vk.Vka)
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s.Vk.Vkb = BigInt3ToHex(setup.Vk.Vkb)
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s.Vk.Vkc = BigInt32ToHex(setup.Vk.Vkc)
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s.Vk.IC = Array3BigIntToHex(setup.Vk.IC)
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s.Vk.G1Kbg = BigInt3ToHex(setup.Vk.G1Kbg)
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s.Vk.G2Kbg = BigInt32ToHex(setup.Vk.G2Kbg)
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s.Vk.G2Kg = BigInt32ToHex(setup.Vk.G2Kg)
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s.Vk.Vkz = BigInt32ToHex(setup.Vk.Vkz)
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return s
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}
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func SetupFromHex(s SetupHex) (snark.Setup, error) {
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var o snark.Setup
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var err error
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o.Pk.G1T, err = Array3HexToBigInt(s.Pk.G1T)
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if err != nil {
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return o, err
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}
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o.Pk.A, err = Array3HexToBigInt(s.Pk.A)
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if err != nil {
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return o, err
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}
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o.Pk.B, err = Array32HexToBigInt(s.Pk.B)
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if err != nil {
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return o, err
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}
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o.Pk.C, err = Array3HexToBigInt(s.Pk.C)
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if err != nil {
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return o, err
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}
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o.Pk.Kp, err = Array3HexToBigInt(s.Pk.Kp)
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if err != nil {
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return o, err
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}
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o.Pk.Ap, err = Array3HexToBigInt(s.Pk.Ap)
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if err != nil {
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return o, err
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}
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o.Pk.Bp, err = Array3HexToBigInt(s.Pk.Bp)
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if err != nil {
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return o, err
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}
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o.Pk.Cp, err = Array3HexToBigInt(s.Pk.Cp)
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if err != nil {
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return o, err
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}
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o.Pk.Z, err = ArrayHexToBigInt(s.Pk.Z)
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if err != nil {
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return o, err
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}
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o.Vk.Vka, err = Hex32ToBigInt(s.Vk.Vka)
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if err != nil {
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return o, err
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}
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o.Vk.Vkb, err = Hex3ToBigInt(s.Vk.Vkb)
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if err != nil {
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return o, err
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}
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o.Vk.Vkc, err = Hex32ToBigInt(s.Vk.Vkc)
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if err != nil {
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return o, err
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}
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o.Vk.IC, err = Array3HexToBigInt(s.Vk.IC)
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if err != nil {
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return o, err
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}
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o.Vk.G1Kbg, err = Hex3ToBigInt(s.Vk.G1Kbg)
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if err != nil {
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return o, err
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}
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o.Vk.G2Kbg, err = Hex32ToBigInt(s.Vk.G2Kbg)
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if err != nil {
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return o, err
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}
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o.Vk.G2Kg, err = Hex32ToBigInt(s.Vk.G2Kg)
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if err != nil {
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return o, err
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}
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o.Vk.Vkz, err = Hex32ToBigInt(s.Vk.Vkz)
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if err != nil {
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return o, err
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}
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return o, nil
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}
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// circuit
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type CircuitHex struct {
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NVars int
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NPublic int
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NSignals int
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PrivateInputs []string
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PublicInputs []string
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Signals []string
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Witness []string
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Constraints []circuitcompiler.Constraint
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R1CS struct {
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A [][]string
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B [][]string
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C [][]string
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}
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}
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func ArrayArrayBigIntToHex(b [][]*big.Int) [][]string {
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var o [][]string
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for i := 0; i < len(b); i++ {
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o = append(o, ArrayBigIntToHex(b[i]))
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}
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return o
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}
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func ArrayArrayHexToBigInt(s [][]string) ([][]*big.Int, error) {
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var o [][]*big.Int
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for i := 0; i < len(s); i++ {
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parsed, err := ArrayHexToBigInt(s[i])
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if err != nil {
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return o, err
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}
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o = append(o, parsed)
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}
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return o, nil
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}
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func CircuitToHex(c circuitcompiler.Circuit) CircuitHex {
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var cs CircuitHex
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cs.NVars = c.NVars
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cs.NPublic = c.NPublic
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cs.NSignals = c.NSignals
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cs.PrivateInputs = c.PrivateInputs
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cs.PublicInputs = c.PublicInputs
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cs.Signals = c.Signals
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cs.Witness = ArrayBigIntToHex(c.Witness)
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cs.Constraints = c.Constraints
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cs.R1CS.A = ArrayArrayBigIntToHex(c.R1CS.A)
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cs.R1CS.B = ArrayArrayBigIntToHex(c.R1CS.B)
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cs.R1CS.C = ArrayArrayBigIntToHex(c.R1CS.C)
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return cs
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}
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func CircuitFromHex(cs CircuitHex) (circuitcompiler.Circuit, error) {
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var c circuitcompiler.Circuit
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var err error
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c.NVars = cs.NVars
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c.NPublic = cs.NPublic
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c.NSignals = cs.NSignals
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c.PrivateInputs = cs.PrivateInputs
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c.PublicInputs = cs.PublicInputs
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c.Signals = cs.Signals
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c.Witness, err = ArrayHexToBigInt(cs.Witness)
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if err != nil {
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return c, err
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}
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c.Constraints = cs.Constraints
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c.R1CS.A, err = ArrayArrayHexToBigInt(cs.R1CS.A)
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if err != nil {
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return c, err
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}
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c.R1CS.B, err = ArrayArrayHexToBigInt(cs.R1CS.B)
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if err != nil {
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return c, err
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}
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c.R1CS.C, err = ArrayArrayHexToBigInt(cs.R1CS.C)
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if err != nil {
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return c, err
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}
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return c, nil
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}
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// Proof
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type ProofHex struct {
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PiA [3]string
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PiAp [3]string
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PiB [3][2]string
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PiBp [3]string
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PiC [3]string
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PiCp [3]string
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PiH [3]string
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PiKp [3]string
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}
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func ProofToHex(p snark.Proof) ProofHex {
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var s ProofHex
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s.PiA = BigInt3ToHex(p.PiA)
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s.PiAp = BigInt3ToHex(p.PiAp)
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s.PiB = BigInt32ToHex(p.PiB)
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s.PiBp = BigInt3ToHex(p.PiBp)
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s.PiC = BigInt3ToHex(p.PiC)
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s.PiCp = BigInt3ToHex(p.PiCp)
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s.PiH = BigInt3ToHex(p.PiH)
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s.PiKp = BigInt3ToHex(p.PiKp)
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return s
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}
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func ProofFromHex(s ProofHex) (snark.Proof, error) {
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var p snark.Proof
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var err error
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p.PiA, err = Hex3ToBigInt(s.PiA)
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if err != nil {
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return p, err
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}
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p.PiAp, err = Hex3ToBigInt(s.PiAp)
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if err != nil {
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return p, err
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}
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p.PiB, err = Hex32ToBigInt(s.PiB)
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if err != nil {
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return p, err
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}
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p.PiBp, err = Hex3ToBigInt(s.PiBp)
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if err != nil {
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return p, err
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}
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p.PiC, err = Hex3ToBigInt(s.PiC)
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if err != nil {
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return p, err
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}
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p.PiCp, err = Hex3ToBigInt(s.PiCp)
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if err != nil {
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return p, err
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}
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p.PiH, err = Hex3ToBigInt(s.PiH)
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if err != nil {
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return p, err
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}
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p.PiKp, err = Hex3ToBigInt(s.PiKp)
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if err != nil {
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return p, err
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}
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return p, nil
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}
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// groth
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type GrothPkHex struct { // Proving Key
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BACDelta [][3]string
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Z []string
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G1 struct {
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Alpha [3]string
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Beta [3]string
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Delta [3]string
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At [][3]string
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BACGamma [][3]string
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}
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G2 struct {
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Beta [3][2]string
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Gamma [3][2]string
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Delta [3][2]string
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BACGamma [][3][2]string
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}
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PowersTauDelta [][3]string
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}
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type GrothVkHex struct {
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IC [][3]string
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G1 struct {
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Alpha [3]string
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}
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G2 struct {
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Beta [3][2]string
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Gamma [3][2]string
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Delta [3][2]string
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}
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}
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type GrothSetupHex struct {
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Pk GrothPkHex
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Vk GrothVkHex
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}
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func GrothSetupToHex(setup groth16.Setup) GrothSetupHex {
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var s GrothSetupHex
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s.Pk.BACDelta = Array3BigIntToHex(setup.Pk.BACDelta)
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s.Pk.Z = ArrayBigIntToHex(setup.Pk.Z)
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s.Pk.G1.Alpha = BigInt3ToHex(setup.Pk.G1.Alpha)
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s.Pk.G1.Beta = BigInt3ToHex(setup.Pk.G1.Beta)
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s.Pk.G1.Delta = BigInt3ToHex(setup.Pk.G1.Delta)
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s.Pk.G1.At = Array3BigIntToHex(setup.Pk.G1.At)
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s.Pk.G1.BACGamma = Array3BigIntToHex(setup.Pk.G1.BACGamma)
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s.Pk.G2.Beta = BigInt32ToHex(setup.Pk.G2.Beta)
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s.Pk.G2.Gamma = BigInt32ToHex(setup.Pk.G2.Gamma)
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s.Pk.G2.Delta = BigInt32ToHex(setup.Pk.G2.Delta)
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s.Pk.G2.BACGamma = Array32BigIntToHex(setup.Pk.G2.BACGamma)
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s.Pk.PowersTauDelta = Array3BigIntToHex(setup.Pk.PowersTauDelta)
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s.Vk.IC = Array3BigIntToHex(setup.Vk.IC)
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s.Vk.G1.Alpha = BigInt3ToHex(setup.Vk.G1.Alpha)
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s.Vk.G2.Beta = BigInt32ToHex(setup.Vk.G2.Beta)
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s.Vk.G2.Gamma = BigInt32ToHex(setup.Vk.G2.Gamma)
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s.Vk.G2.Delta = BigInt32ToHex(setup.Vk.G2.Delta)
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return s
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}
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func GrothSetupFromHex(s GrothSetupHex) (groth16.Setup, error) {
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var o groth16.Setup
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var err error
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o.Pk.BACDelta, err = Array3HexToBigInt(s.Pk.BACDelta)
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if err != nil {
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return o, err
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}
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o.Pk.Z, err = ArrayHexToBigInt(s.Pk.Z)
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if err != nil {
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return o, err
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}
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o.Pk.G1.Alpha, err = Hex3ToBigInt(s.Pk.G1.Alpha)
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if err != nil {
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return o, err
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}
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o.Pk.G1.Beta, err = Hex3ToBigInt(s.Pk.G1.Beta)
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if err != nil {
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return o, err
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}
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o.Pk.G1.Delta, err = Hex3ToBigInt(s.Pk.G1.Delta)
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if err != nil {
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return o, err
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}
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o.Pk.G1.At, err = Array3HexToBigInt(s.Pk.G1.At)
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if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.G1.BACGamma, err = Array3HexToBigInt(s.Pk.G1.BACGamma)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.G2.Beta, err = Hex32ToBigInt(s.Pk.G2.Beta)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.G2.Gamma, err = Hex32ToBigInt(s.Pk.G2.Gamma)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.G2.Delta, err = Hex32ToBigInt(s.Pk.G2.Delta)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.G2.BACGamma, err = Array32HexToBigInt(s.Pk.G2.BACGamma)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Pk.PowersTauDelta, err = Array3HexToBigInt(s.Pk.PowersTauDelta)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Vk.IC, err = Array3HexToBigInt(s.Vk.IC)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Vk.G1.Alpha, err = Hex3ToBigInt(s.Vk.G1.Alpha)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Vk.G2.Beta, err = Hex32ToBigInt(s.Vk.G2.Beta)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Vk.G2.Gamma, err = Hex32ToBigInt(s.Vk.G2.Gamma)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
o.Vk.G2.Delta, err = Hex32ToBigInt(s.Vk.G2.Delta)
|
|
if err != nil {
|
|
return o, err
|
|
}
|
|
return o, nil
|
|
}
|
|
|
|
type GrothProofHex struct {
|
|
PiA [3]string
|
|
PiB [3][2]string
|
|
PiC [3]string
|
|
}
|
|
|
|
func GrothProofToHex(p groth16.Proof) GrothProofHex {
|
|
var s GrothProofHex
|
|
s.PiA = BigInt3ToHex(p.PiA)
|
|
s.PiB = BigInt32ToHex(p.PiB)
|
|
s.PiC = BigInt3ToHex(p.PiC)
|
|
return s
|
|
}
|
|
func GrothProofFromHex(s GrothProofHex) (groth16.Proof, error) {
|
|
var p groth16.Proof
|
|
var err error
|
|
|
|
p.PiA, err = Hex3ToBigInt(s.PiA)
|
|
if err != nil {
|
|
return p, err
|
|
}
|
|
p.PiB, err = Hex32ToBigInt(s.PiB)
|
|
if err != nil {
|
|
return p, err
|
|
}
|
|
p.PiC, err = Hex3ToBigInt(s.PiC)
|
|
if err != nil {
|
|
return p, err
|
|
}
|
|
return p, nil
|
|
}
|