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38 lines
1.4 KiB
Go
38 lines
1.4 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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)
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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 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 contract.Call(interop.Hash160(Hash), "sha256", 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 contract.Call(interop.Hash160(Hash), "ripemd160", contract.NoneFlag, b).(interop.Hash160)
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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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// correct msg's signature for a given pub (serialized public key on a given curve).
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func VerifyWithECDsa(msg []byte, pub interop.PublicKey, sig interop.Signature, curve NamedCurve) bool {
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return contract.Call(interop.Hash160(Hash), "verifyWithECDsa", contract.NoneFlag, msg, pub, sig, curve).(bool)
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}
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