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compiler: add public key recovering syscalls

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Added Secp256r1Recover and Secp256k1Recover syscalls.
This commit is contained in:
Anna Shaleva 2020-06-05 21:01:21 +03:00
parent 0b87a68210
commit 4f1cf07075
2 changed files with 25 additions and 1 deletions
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4
pkg/compiler/syscall.go
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@ -11,6 +11,10 @@ var syscalls = map[string]map[string]string{
"GetUsage": "Neo.Attribute.GetUsage",
"GetData": "Neo.Attribute.GetData",
},
"crypto": {
"Secp256k1Recover": "Neo.Cryptography.Secp256k1Recover",
"Secp256r1Recover": "Neo.Cryptography.Secp256r1Recover",
},
"enumerator": {
"Concat": "Neo.Enumerator.Concat",
"Create": "Neo.Enumerator.Create",

22
pkg/interop/crypto/crypto.go
View file

@ -1,5 +1,5 @@
/*
Package crypto provides an interface to VM cryptographic instructions.
Package crypto provides an interface to VM cryptographic instructions and syscalls.
*/
package crypto
@ -30,3 +30,23 @@ func Hash256(b []byte) []byte {
func VerifySignature(msg []byte, sig []byte, pub []byte) bool {
return false
}
// Secp256k1Recover recovers public key from the given signature (r, s) on the
// given message hash using Secp256k1 elliptic curve. Flag isEven denotes Y's
// least significant bit in decompression algorithm. The return value is byte
// array representation of the public key which is either empty (if it's not
// possible to recover key) or contains 32 bytes in BE for X point (in case of
// success). This function uses Neo.Cryptography.Secp256k1Recover syscall.
func Secp256k1Recover(r []byte, s []byte, messageHash []byte, isEven bool) []byte {
return nil
}
// Secp256r1Recover recovers public key from the given signature (r, s) on the
// given message hash using Secp256r1 elliptic curve. Flag isEven denotes Y's
// least significant bit in decompression algorithm. The return value is byte
// array representation of the public key which is either empty (if it's not
// possible to recover key) or contains 32 bytes in BE for X point (in case of
// success). This function uses Neo.Cryptography.Secp256r1Recover syscall.
func Secp256r1Recover(r []byte, s []byte, messageHash []byte, isEven bool) []byte {
return nil
}