1 // Copyright 2016 Google LLC. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package ctfe 16 17 // Code to handle encoding / decoding various data structures used in RFC 6962. Does not 18 // contain the low level serialization. 19 20 import ( 21 "crypto" 22 "crypto/sha256" 23 24 "github.com/google/certificate-transparency-go/x509" 25 ) 26 27 const millisPerNano int64 = 1000 * 1000 28 29 // GetCTLogID takes the key manager for a log and returns the LogID. (see RFC 6962 S3.2) 30 // In CT V1 the log id is a hash of the public key. 31 func GetCTLogID(pk crypto.PublicKey) ([sha256.Size]byte, error) { 32 pubBytes, err := x509.MarshalPKIXPublicKey(pk) 33 if err != nil { 34 return [sha256.Size]byte{}, err 35 } 36 return sha256.Sum256(pubBytes), nil 37 } 38