1 // 2 // Copyright (c) SAS Institute Inc. 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 package p11token 18 19 import ( 20 "crypto/rand" 21 "encoding/hex" 22 "math/big" 23 "strings" 24 ) 25 26 func makeKeyID() []byte { 27 keyID := make([]byte, 20) 28 if n, err := rand.Reader.Read(keyID); err != nil || n != 20 { 29 return nil 30 } 31 return keyID 32 } 33 34 func parseKeyID(value string) ([]byte, error) { 35 return hex.DecodeString(strings.Replace(value, ":", "", -1)) 36 } 37 38 func bytesToBig(val []byte) *big.Int { 39 return new(big.Int).SetBytes(val) 40 } 41