/usr/share/gocode/src/github.com/btcsuite/btcd/chaincfg/chainhash/hashfuncs.go is in golang-github-btcsuite-btcd-chaincfg-chainhash-dev 0.0+git20161209.0.7a4cc89-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | // Copyright (c) 2015 The Decred developers
// Copyright (c) 2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package chainhash
import "github.com/btcsuite/fastsha256"
// HashB calculates hash(b) and returns the resulting bytes.
func HashB(b []byte) []byte {
hash := fastsha256.Sum256(b)
return hash[:]
}
// HashH calculates hash(b) and returns the resulting bytes as a Hash.
func HashH(b []byte) Hash {
return Hash(fastsha256.Sum256(b))
}
// DoubleHashB calculates hash(hash(b)) and returns the resulting bytes.
func DoubleHashB(b []byte) []byte {
first := fastsha256.Sum256(b)
second := fastsha256.Sum256(first[:])
return second[:]
}
// DoubleHashH calculates hash(hash(b)) and returns the resulting bytes as a
// Hash.
func DoubleHashH(b []byte) Hash {
first := fastsha256.Sum256(b)
return Hash(fastsha256.Sum256(first[:]))
}
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