// Create a new Secret for the Ed25519 curve.
func (c *Curve) Secret() abstract.Secret {
// if c.FullGroup {
// return nist.NewInt(0, fullOrder)
// } else {
return nist.NewInt(0, &primeOrder.V)
// }
}
/* Creates a new insurance request message
*
* Arguments:
* s = the shared secret to give to the insurer.
* pc = the public polynomial to check the share against.
*
* Returns:
* A new insurance request message.
*/
func (msg *RequestInsuranceMessage) createMessage(p abstract.Point, shareNum int,
s abstract.Secret, pc *poly.PubPoly) *RequestInsuranceMessage {
msg.PubKey = p
msg.ShareNumber = nist.NewInt(int64(shareNum), big.NewInt(int64(math.MaxInt64)))
msg.Share = s
msg.PubCommit = pc
return msg
}
// Decodes a message received.
// NOTE: In order to be encoded properly, public polynomials need to be
// initialized with the right group and minimum number of shares.
func (msg *RequestInsuranceMessage) UnmarshalBinary(data []byte) (*RequestInsuranceMessage, error) {
msg.PubCommit = new(poly.PubPoly)
msg.PubCommit.Init(INSURE_GROUP, TSHARES, nil)
msg.PubKey = KEY_SUITE.Point()
msg.Share = INSURE_GROUP.Secret().Pick(random.Stream)
msg.ShareNumber = nist.NewInt(int64(0), big.NewInt(int64(math.MaxInt64)))
b := bytes.NewBuffer(data)
err := abstract.Read(b, msg, INSURE_GROUP)
if err != nil {
panic(err)
}
return msg, err
// return msg, protobuf.Decode(data, msg)
}
// Create a new ModInt representing a coordinate on this curve,
// with a given int64 integer value for constant-initialization convenience.
func (P *basicPoint) coord(v int64) *nist.Int {
return nist.NewInt(v, &P.c.P)
}
// Create a new Secret for this curve.
func (c *curve) Secret() abstract.Secret {
return nist.NewInt(0, &c.order.V)
}
"crypto/cipher"
"crypto/sha256"
"encoding/hex"
"github.com/dedis/crypto/abstract"
"github.com/dedis/crypto/group"
"github.com/dedis/crypto/nist"
"github.com/dedis/crypto/random"
"github.com/dedis/crypto/sha3"
"math/big"
)
// prime order of base point = 2^252 + 27742317777372353535851937790883648493
var primeOrder, _ = new(nist.Int).SetString("7237005577332262213973186563042994240857116359379907606001950938285454250989", "", 10)
// curve's cofactor
var cofactor = nist.NewInt(8, &primeOrder.V)
var nullPoint = new(point).Null()
type point struct {
p C.ge_p3
}
type curve struct {
}
// Convert little-endian byte slice to hex string
func tohex(s []byte) string {
b := make([]byte, len(s))
for i := range b { // byte-swap to big-endian for display
b[i] = s[31-i]