/
ciphersuites.go
58 lines (52 loc) · 1.72 KB
/
ciphersuites.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
// Copyright (c) 2022 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tlscfg
import (
"crypto/tls"
"fmt"
)
// https://pkg.go.dev/crypto/tls#pkg-constants
var versions = map[string]uint16{
"1.0": tls.VersionTLS10,
"1.1": tls.VersionTLS11,
"1.2": tls.VersionTLS12,
"1.3": tls.VersionTLS13,
}
func allCiphers() map[string]uint16 {
acceptedCiphers := make(map[string]uint16)
for _, suite := range tls.CipherSuites() {
acceptedCiphers[suite.Name] = suite.ID
}
return acceptedCiphers
}
// CipherSuiteNamesToIDs returns a list of cipher suite IDs from the cipher suite names passed.
func CipherSuiteNamesToIDs(cipherNames []string) ([]uint16, error) {
var ciphersIDs []uint16
possibleCiphers := allCiphers()
for _, cipher := range cipherNames {
intValue, ok := possibleCiphers[cipher]
if !ok {
return nil, fmt.Errorf("cipher suite %s not supported or doesn't exist", cipher)
}
ciphersIDs = append(ciphersIDs, intValue)
}
return ciphersIDs, nil
}
// VersionNameToID returns the version ID from version name
func VersionNameToID(versionName string) (uint16, error) {
if version, ok := versions[versionName]; ok {
return version, nil
}
return 0, fmt.Errorf("unknown tls version %q", versionName)
}