path: root/go/bls/bls.go

package bls

/*
#cgo CFLAGS:-I../../include -DBLS_MAX_OP_UNIT_SIZE=6
#cgo bn256 CFLAGS:-UBLS_MAX_OP_UNIT_SIZE -DBLS_MAX_OP_UNIT_SIZE=4
#cgo bn384 CFLAGS:-UBLS_MAX_OP_UNIT_SIZE -DBLS_MAX_OP_UNIT_SIZE=6
#cgo LDFLAGS:-lbls -lbls_if -lmcl -lgmp -lgmpxx -L../lib -L../../lib -L../../../mcl/lib -L../../mcl/lib  -lstdc++ -lcrypto
#include "bls_if.h"
*/
import "C"
import "fmt"
import "unsafe"
import "encoding/hex"

// CurveFp254BNb -- 254 bit curve
const CurveFp254BNb = 0

// CurveFp382_1 -- 382 bit curve 1
const CurveFp382_1 = 1

// CurveFp382_2 -- 382 bit curve 2
const CurveFp382_2 = 2

// Init --
// call this function before calling all the other operations
// this function is not thread safe
func Init(curve int) error {
    err := C.blsInit(C.int(curve), C.BLS_MAX_OP_UNIT_SIZE)
    if err != 0 {
        return fmt.Errorf("ERR Init curve=%d", curve)
    }
    return nil
}

// GetMaxOpUnitSize --
func GetMaxOpUnitSize() int {
    return int(C.BLS_MAX_OP_UNIT_SIZE)
}

// GetOpUnitSize --
func GetOpUnitSize() int {
    return int(C.blsGetOpUnitSize())
}

// GetCurveOrder --
func GetCurveOrder() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsGetCurveOrder((*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return string(buf[:n])
}

// GetFieldOrder --
func GetFieldOrder() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsGetFieldOrder((*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return string(buf[:n])
}

// ID --
type ID struct {
    v [C.BLS_MAX_OP_UNIT_SIZE]C.uint64_t
}

// getPointer --
func (id *ID) getPointer() (p *C.blsId) {
    // #nosec
    return (*C.blsId)(unsafe.Pointer(&id.v[0]))
}

// GetByte --
func (id *ID) GetByte(ioMode int) []byte {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsIdGetStr(id.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return buf[:n]
}

// SetByte --
func (id *ID) SetByte(buf []byte, ioMode int) error {
    // #nosec
    err := C.blsIdSetStr(id.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if err != 0 {
        return fmt.Errorf("bad byte:%x", buf)
    }
    return nil
}

// Serialize --
func (id *ID) Serialize() []byte {
    return id.GetByte(C.blsIoEcComp)
}

// Deserialize --
func (id *ID) Deserialize(b []byte) error {
    return id.SetByte(b, C.blsIoEcComp)
}

// GetHexString --
func (id *ID) GetHexString() string {
    return string(id.GetByte(16))
}

// GetDecString --
func (id *ID) GetDecString() string {
    return string(id.GetByte(10))
}

// SetHexString --
func (id *ID) SetHexString(s string) error {
    return id.SetByte([]byte(s), 16)
}

// SetDecString --
func (id *ID) SetDecString(s string) error {
    return id.SetByte([]byte(s), 10)
}

// IsSame --
func (id *ID) IsSame(rhs *ID) bool {
    return C.blsIdIsSame(id.getPointer(), rhs.getPointer()) == 1
}

// Set --
func (id *ID) Set(v []uint64) {
    expect := GetOpUnitSize()
    if len(v) != expect {
        panic(fmt.Errorf("bad size (%d), expected size %d", len(v), expect))
    }
    // #nosec
    C.blsIdSet(id.getPointer(), (*C.uint64_t)(unsafe.Pointer(&v[0])))
}

// SecretKey --
type SecretKey struct {
    v [C.BLS_MAX_OP_UNIT_SIZE]C.uint64_t
}

// getPointer --
func (sec *SecretKey) getPointer() (p *C.blsSecretKey) {
    // #nosec
    return (*C.blsSecretKey)(unsafe.Pointer(&sec.v[0]))
}

// GetByte --
func (sec *SecretKey) GetByte(ioMode int) []byte {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsSecretKeyGetStr(sec.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return buf[:n]
}

// SetByte --
func (sec *SecretKey) SetByte(buf []byte, ioMode int) error {
    // #nosec
    err := C.blsSecretKeySetStr(sec.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if err != 0 {
        return fmt.Errorf("bad byte:%x", buf)
    }
    return nil
}

// Serialize --
func (sec *SecretKey) Serialize() []byte {
    return sec.GetByte(C.blsIoEcComp)
}

// Deserialize --
func (sec *SecretKey) Deserialize(b []byte) error {
    return sec.SetByte(b, C.blsIoEcComp)
}

// GetHexString --
func (sec *SecretKey) GetHexString() string {
    return string(sec.GetByte(16))
}

// GetDecString --
func (sec *SecretKey) GetDecString() string {
    return string(sec.GetByte(10))
}

// SetHexString --
func (sec *SecretKey) SetHexString(s string) error {
    return sec.SetByte([]byte(s), 16)
}

// SetDecString --
func (sec *SecretKey) SetDecString(s string) error {
    return sec.SetByte([]byte(s), 10)
}

// IsSame --
func (sec *SecretKey) IsSame(rhs *SecretKey) bool {
    return C.blsSecretKeyIsSame(sec.getPointer(), rhs.getPointer()) == 1
}

// SetArray --
func (sec *SecretKey) SetArray(v []uint64) {
    expect := GetOpUnitSize()
    if len(v) != expect {
        panic(fmt.Errorf("bad size (%d), expected size %d", len(v), expect))
    }
    // #nosec
    C.blsSecretKeySetArray(sec.getPointer(), (*C.uint64_t)(unsafe.Pointer(&v[0])))
}

// Init --
func (sec *SecretKey) Init() {
    C.blsSecretKeyInit(sec.getPointer())
}

// Add --
func (sec *SecretKey) Add(rhs *SecretKey) {
    C.blsSecretKeyAdd(sec.getPointer(), rhs.getPointer())
}

// GetMasterSecretKey --
func (sec *SecretKey) GetMasterSecretKey(k int) (msk []SecretKey) {
    msk = make([]SecretKey, k)
    msk[0] = *sec
    for i := 1; i < k; i++ {
        msk[i].Init()
    }
    return msk
}

// GetMasterPublicKey --
func GetMasterPublicKey(msk []SecretKey) (mpk []PublicKey) {
    n := len(msk)
    mpk = make([]PublicKey, n)
    for i := 0; i < n; i++ {
        mpk[i] = *msk[i].GetPublicKey()
    }
    return mpk
}

// Set --
func (sec *SecretKey) Set(msk []SecretKey, id *ID) error {
    err := C.blsSecretKeySet(sec.getPointer(), msk[0].getPointer(), C.size_t(len(msk)), id.getPointer())
    if err != 0 {
        return fmt.Errorf("SecretKey.Set")
    }
    return nil
}

// Recover --
func (sec *SecretKey) Recover(secVec []SecretKey, idVec []ID) error {
    err := C.blsSecretKeyRecover(sec.getPointer(), secVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(secVec)))
    if err != 0 {
        return fmt.Errorf("SecretKey.Recover")
    }
    return nil
}

// GetPop --
func (sec *SecretKey) GetPop() (sign *Sign) {
    sign = new(Sign)
    C.blsSecretKeyGetPop(sec.getPointer(), sign.getPointer())
    return sign
}

// PublicKey --
type PublicKey struct {
    v [C.BLS_MAX_OP_UNIT_SIZE * 2 * 3]C.uint64_t
}

// getPointer --
func (pub *PublicKey) getPointer() (p *C.blsPublicKey) {
    // #nosec
    return (*C.blsPublicKey)(unsafe.Pointer(&pub.v[0]))
}

// GetByte --
func (pub *PublicKey) GetByte(ioMode int) []byte {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsPublicKeyGetStr(pub.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return buf[:n]
}

// SetByte --
func (pub *PublicKey) SetByte(buf []byte, ioMode int) error {
    // #nosec
    err := C.blsPublicKeySetStr(pub.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if err != 0 {
        return fmt.Errorf("bad byte:%x", buf)
    }
    return nil
}

// Serialize --
func (pub *PublicKey) Serialize() []byte {
    return pub.GetByte(C.blsIoEcComp)
}

// Deserialize --
func (pub *PublicKey) Deserialize(b []byte) error {
    return pub.SetByte(b, C.blsIoEcComp)
}

// GetHexString --
func (pub *PublicKey) GetHexString() string {
    return fmt.Sprintf("%x", pub.Serialize())
}

// SetHexString --
func (pub *PublicKey) SetHexString(s string) error {
    b, err := hex.DecodeString(s)
    if err != nil {
        return err
    }
    return pub.Deserialize(b)
}

// IsSame --
func (pub *PublicKey) IsSame(rhs *PublicKey) bool {
    return C.blsPublicKeyIsSame(pub.getPointer(), rhs.getPointer()) == 1
}

// Add --
func (pub *PublicKey) Add(rhs *PublicKey) {
    C.blsPublicKeyAdd(pub.getPointer(), rhs.getPointer())
}

// Set --
func (pub *PublicKey) Set(mpk []PublicKey, id *ID) error {
    err := C.blsPublicKeySet(pub.getPointer(), mpk[0].getPointer(), C.size_t(len(mpk)), id.getPointer())
    if err != 0 {
        return fmt.Errorf("PublicKey.set")
    }
    return nil
}

// Recover --
func (pub *PublicKey) Recover(pubVec []PublicKey, idVec []ID) error {
    err := C.blsPublicKeyRecover(pub.getPointer(), pubVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(pubVec)))
    if err != 0 {
        return fmt.Errorf("PublicKey.Recover")
    }
    return nil
}

// Sign  --
type Sign struct {
    v [C.BLS_MAX_OP_UNIT_SIZE * 3]C.uint64_t
}

// getPointer --
func (sign *Sign) getPointer() (p *C.blsSign) {
    // #nosec
    return (*C.blsSign)(unsafe.Pointer(&sign.v[0]))
}

// GetByte --
func (sign *Sign) GetByte(ioMode int) []byte {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsSignGetStr(sign.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if n == 0 {
        panic("implementation err. size of buf is small")
    }
    return buf[:n]
}

// SetByte --
func (sign *Sign) SetByte(buf []byte, ioMode int) error {
    // #nosec
    err := C.blsSignSetStr(sign.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)), C.int(ioMode))
    if err != 0 {
        return fmt.Errorf("bad byte:%x", buf)
    }
    return nil
}

// Serialize --
func (sign *Sign) Serialize() []byte {
    return sign.GetByte(C.blsIoEcComp)
}

// Deserialize --
func (sign *Sign) Deserialize(b []byte) error {
    return sign.SetByte(b, C.blsIoEcComp)
}

// GetHexString --
func (sign *Sign) GetHexString() string {
    return fmt.Sprintf("%x", sign.Serialize())
}

// SetHexString --
func (sign *Sign) SetHexString(s string) error {
    b, err := hex.DecodeString(s)
    if err != nil {
        return err
    }
    return sign.Deserialize(b)
}

// IsSame --
func (sign *Sign) IsSame(rhs *Sign) bool {
    return C.blsSignIsSame(sign.getPointer(), rhs.getPointer()) == 1
}

// GetPublicKey --
func (sec *SecretKey) GetPublicKey() (pub *PublicKey) {
    pub = new(PublicKey)
    C.blsSecretKeyGetPublicKey(sec.getPointer(), pub.getPointer())
    return pub
}

// Sign -- Constant Time version
func (sec *SecretKey) Sign(m string) (sign *Sign) {
    sign = new(Sign)
    buf := []byte(m)
    // #nosec
    C.blsSecretKeySign(sec.getPointer(), sign.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)))
    return sign
}

// Add --
func (sign *Sign) Add(rhs *Sign) {
    C.blsSignAdd(sign.getPointer(), rhs.getPointer())
}

// Recover --
func (sign *Sign) Recover(signVec []Sign, idVec []ID) error {
    err := C.blsSignRecover(sign.getPointer(), signVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(signVec)))
    if err != 0 {
        return fmt.Errorf("Sign.Recover")
    }
    return nil
}

// Verify --
func (sign *Sign) Verify(pub *PublicKey, m string) bool {
    buf := []byte(m)
    // #nosec
    return C.blsSignVerify(sign.getPointer(), pub.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf))) == 1
}

// VerifyPop --
func (sign *Sign) VerifyPop(pub *PublicKey) bool {
    return C.blsSignVerifyPop(sign.getPointer(), pub.getPointer()) == 1
}