69 lines
2.1 KiB
Go
69 lines
2.1 KiB
Go
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// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package crypto
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import "fmt"
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import "encoding/hex"
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const HashLength = 32
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type Hash [HashLength]byte
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var ZEROHASH Hash
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func (h Hash) MarshalText() ([]byte, error) {
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return []byte(fmt.Sprintf("%x", h[:])), nil
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}
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func (h *Hash) UnmarshalText(data []byte) (err error) {
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byteSlice, _ := hex.DecodeString(string(data))
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if len(byteSlice) != 32 {
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return fmt.Errorf("Incorrect hash size")
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}
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copy(h[:], byteSlice)
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return
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}
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// stringifier
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func (h Hash) String() string {
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return fmt.Sprintf("%064x", h[:])
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}
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func (h Hash) IsZero() bool {
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var zerohash Hash
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return h == zerohash
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}
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// convert a hash of hex form to binary form, returns a zero hash if any error
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// TODO this should be in crypto
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func HashHexToHash(hash_hex string) (hash Hash) {
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hash_raw, err := hex.DecodeString(hash_hex)
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if err != nil {
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//panic(fmt.Sprintf("Cannot hex decode checkpint hash \"%s\"", hash_hex))
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return hash
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}
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if len(hash_raw) != 32 {
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//panic(fmt.Sprintf(" hash not 32 byte size Cannot hex decode checkpint hash \"%s\"", hash_hex))
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return hash
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}
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copy(hash[:], hash_raw)
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return
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}
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