1 // GoGOST -- Pure Go GOST cryptographic functions library
2 // Copyright (C) 2015-2024 Sergey Matveev <stargrave@stargrave.org>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, version 3 of the License.
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program. If not, see <http://www.gnu.org/licenses/>.
16 // DANE's SPKI hash calculator
33 data, err := io.ReadAll(os.Stdin)
37 b, _ := pem.Decode(data)
38 if b == nil || b.Type != "CERTIFICATE" {
39 log.Fatal("no CERTIFICATE")
41 cer, err := x509.ParseCertificate(b.Bytes)
45 h := sha256.Sum256(cer.RawSubjectPublicKeyInfo)
46 fmt.Println(hex.EncodeToString(h[:]))