path: root/go/blscgo/bls.go

package blscgo

/*
#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"

const CurveFp254BNb = 0
const CurveFp382_1 = 1
const CurveFp382_2 = 2

// Init --
func Init(curve int) {
    C.blsInit(C.int(curve), C.BLS_MAX_OP_UNIT_SIZE)
}

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

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

// 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]))
}

// String --
func (id *ID) String() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsIdGetStr(id.getPointer(), (*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])
}

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

// 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]))
}

// String --
func (sec *SecretKey) String() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsSecretKeyGetStr(sec.getPointer(), (*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])
}

// SetStr -- The string passed in is a number and can be either hex or decimal
func (sec *SecretKey) SetStr(s string) error {
    buf := []byte(s)
    // #nosec
    err := C.blsSecretKeySetStr(sec.getPointer(), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)))
    if err > 0 {
        return fmt.Errorf("bad string:%s", s)
    }
    return nil
}

// 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) {
    C.blsSecretKeySet(sec.getPointer(), msk[0].getPointer(), C.size_t(len(msk)), id.getPointer())
}

// Recover --
func (sec *SecretKey) Recover(secVec []SecretKey, idVec []ID) {
    C.blsSecretKeyRecover(sec.getPointer(), secVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(secVec)))
}

// 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]))
}

// String --
func (pub *PublicKey) String() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsPublicKeyGetStr(pub.getPointer(), (*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])
}

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

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

// Set --
func (pub *PublicKey) Set(mpk []PublicKey, id *ID) {
    C.blsPublicKeySet(pub.getPointer(), mpk[0].getPointer(), C.size_t(len(mpk)), id.getPointer())
}

// Recover --
func (pub *PublicKey) Recover(pubVec []PublicKey, idVec []ID) {
    C.blsPublicKeyRecover(pub.getPointer(), pubVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(pubVec)))
}

// 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]))
}

// String --
func (sign *Sign) String() string {
    buf := make([]byte, 1024)
    // #nosec
    n := C.blsSignGetStr(sign.getPointer(), (*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])
}

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

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

// Sign --
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
}
// Constant Time Sign --
func (sec *SecretKey) SignCT(m string) (sign *Sign) {
    sign = new(Sign)
    buf := []byte(m)
    // #nosec
    C.blsSecretKeySignCT(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) {
    C.blsSignRecover(sign.getPointer(), signVec[0].getPointer(), idVec[0].getPointer(), C.size_t(len(signVec)))
}

// 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
}