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token.go
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token.go
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/**
* Copyright © 2022, Staufi Tech - Switzerland
* All rights reserved.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package utils
import (
"crypto/sha256"
"encoding/hex"
"math/rand"
"time"
)
const CharSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz" +
"1234567890" +
`+-_"*%&<>()=?!:;@#/\|{}[].,`
type Token struct {
Plain string
Sha256 string
}
func CreateNewToken(length int) Token {
rand.Seed(time.Now().UnixNano())
t := make([]byte, length)
for i := range t {
t[i] = CharSet[rand.Intn(len(CharSet))]
}
token := Token{
Plain: string(t),
Sha256: GetSha256([]byte(t)),
}
return token
}
func GetSha256(plain []byte) string {
hasher := sha256.New()
hasher.Write(plain)
return hex.EncodeToString(hasher.Sum(nil))
}