mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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436493350e
1. changes sentinel to use an http-like interface 2. moves hexutil, crypto/blake2b, metrics packages to erigon-lib
57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
//go:build linux
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// +build linux
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package hash
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/*
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#cgo CXXFLAGS: -std=c++17
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#include <stdlib.h>
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#include "hash.h"
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*/
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import "C"
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import (
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"encoding/hex"
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"fmt"
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)
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func reverseHexEndianRepresentation(s string) string {
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rns := []rune(s)
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for i, j := 0, len(rns)-2; i < j; i, j = i+2, j-2 {
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rns[i], rns[j] = rns[j], rns[i]
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rns[i+1], rns[j+1] = rns[j+1], rns[i+1]
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}
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return string(rns)
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}
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func Hash(input1, input2 string) (string, error) {
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input1Dec, _ := hex.DecodeString(reverseHexEndianRepresentation(input1))
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input2Dec, _ := hex.DecodeString(reverseHexEndianRepresentation(input2))
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in1 := C.CBytes(input1Dec)
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in2 := C.CBytes(input2Dec)
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var o [1024]byte
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// i dont know why it triggers here, but it's a false positive
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// nolint:gocritic
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out := C.CBytes(o[:])
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upIn1 := in1
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upIn2 := in2
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upOut := out
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defer func() {
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C.free(upIn1)
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C.free(upIn2)
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C.free(upOut)
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}()
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res := C.CHash(
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(*C.char)(upIn1),
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(*C.char)(upIn2),
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(*C.char)(upOut))
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if res != 0 {
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return "", fmt.Errorf("Pedersen hash encountered an error: %s\n", C.GoBytes(out, 1024))
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}
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hashResult := "0x" + reverseHexEndianRepresentation(
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hex.EncodeToString(C.GoBytes(out, 32)))
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return hashResult, nil
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}
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