forked from TrueCloudLab/neoneo-go
94 lines
4.4 KiB
Go
94 lines
4.4 KiB
Go
/*
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Package crypto provides interface to CryptoLib native contract.
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It implements some cryptographic functions.
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*/
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package crypto
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop"
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"github.com/nspcc-dev/neo-go/pkg/interop/contract"
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"github.com/nspcc-dev/neo-go/pkg/interop/neogointernal"
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)
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// Hash represents CryptoLib contract hash.
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const Hash = "\x1b\xf5\x75\xab\x11\x89\x68\x84\x13\x61\x0a\x35\xa1\x28\x86\xcd\xe0\xb6\x6c\x72"
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// NamedCurve represents a named elliptic curve.
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type NamedCurve byte
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// Various named elliptic curves.
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const (
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Secp256k1 NamedCurve = 22
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Secp256r1 NamedCurve = 23
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)
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// Sha256 calls `sha256` method of native CryptoLib contract and computes SHA256 hash of b.
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func Sha256(b []byte) interop.Hash256 {
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return neogointernal.CallWithToken(Hash, "sha256", int(contract.NoneFlag), b).(interop.Hash256)
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}
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// Ripemd160 calls `ripemd160` method of native CryptoLib contract and computes RIPEMD160 hash of b.
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func Ripemd160(b []byte) interop.Hash160 {
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return neogointernal.CallWithToken(Hash, "ripemd160", int(contract.NoneFlag), b).(interop.Hash160)
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}
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// Murmur32 calls `murmur32` method of native CryptoLib contract and computes Murmur32 hash of b
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// using the given seed.
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func Murmur32(b []byte, seed int) []byte {
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return neogointernal.CallWithToken(Hash, "murmur32", int(contract.NoneFlag), b, seed).([]byte)
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}
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// VerifyWithECDsa calls `verifyWithECDsa` method of native CryptoLib contract and checks that sig is
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// a correct msg's signature for the given pub (serialized public key on the given curve).
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func VerifyWithECDsa(msg []byte, pub interop.PublicKey, sig interop.Signature, curve NamedCurve) bool {
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return neogointernal.CallWithToken(Hash, "verifyWithECDsa", int(contract.NoneFlag), msg, pub, sig, curve).(bool)
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}
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// Bls12381Point represents BLS12-381 curve point (G1 or G2 in the Affine or
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// Jacobian form or GT). Bls12381Point structure is needed for the operations
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// with the curve's points (serialization, addition, multiplication, pairing and
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// equality checks). It's an opaque type that can only be created properly by
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// Bls12381Deserialize, Bls12381Add, Bls12381Mul or Bls12381Pairing. The only
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// way to expose the Bls12381Point out of the runtime to the outside world is by
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// serializing it with Bls12381Serialize method call.
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type Bls12381Point struct{}
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// Bls12381Serialize calls `bls12381Serialize` method of native CryptoLib contract
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// and serializes given BLS12-381 point into byte array.
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func Bls12381Serialize(g Bls12381Point) []byte {
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return neogointernal.CallWithToken(Hash, "bls12381Serialize", int(contract.NoneFlag), g).([]byte)
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}
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// Bls12381Deserialize calls `bls12381Deserialize` method of native CryptoLib
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// contract and deserializes given BLS12-381 point from byte array.
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func Bls12381Deserialize(data []byte) Bls12381Point {
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return neogointernal.CallWithToken(Hash, "bls12381Deserialize", int(contract.NoneFlag), data).(Bls12381Point)
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}
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// Bls12381Equal calls `bls12381Equal` method of native CryptoLib contract and
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// checks whether two BLS12-381 points are equal.
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func Bls12381Equal(x, y Bls12381Point) bool {
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return neogointernal.CallWithToken(Hash, "bls12381Equal", int(contract.NoneFlag), x, y).(bool)
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}
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// Bls12381Add calls `bls12381Add` method of native CryptoLib contract and
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// performs addition operation over two BLS12-381 points.
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func Bls12381Add(x, y Bls12381Point) Bls12381Point {
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return neogointernal.CallWithToken(Hash, "bls12381Add", int(contract.NoneFlag), x, y).(Bls12381Point)
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}
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// Bls12381Mul calls `bls12381Mul` method of native CryptoLib contract and
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// performs multiplication operation over BLS12-381 point and the given scalar
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// multiplicator. The multiplicator is the serialized LE representation of the
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// field element stored on 4 words (uint64) with 32-bytes length. The last
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// argument denotes whether the multiplicator should be negative.
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func Bls12381Mul(x Bls12381Point, mul []byte, neg bool) Bls12381Point {
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return neogointernal.CallWithToken(Hash, "bls12381Mul", int(contract.NoneFlag), x, mul, neg).(Bls12381Point)
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}
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// Bls12381Pairing calls `bls12381Pairing` method of native CryptoLib contract and
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// performs pairing operation over two BLS12-381 points which must be G1 and G2 either
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// in Affine or Jacobian forms. The result of this operation is GT point.
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func Bls12381Pairing(g1, g2 Bls12381Point) Bls12381Point {
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return neogointernal.CallWithToken(Hash, "bls12381Pairing", int(contract.NoneFlag), g1, g2).(Bls12381Point)
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}
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