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