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https://github.com/fluxcd/flux2.git
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67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
/*
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Copyright 2020 The Flux authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package flags
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import (
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"crypto/elliptic"
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"fmt"
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"sort"
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"strings"
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)
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type ECDSACurve struct {
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elliptic.Curve
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}
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var supportedECDSACurves = map[string]elliptic.Curve{
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"p256": elliptic.P256(),
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"p384": elliptic.P384(),
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"p521": elliptic.P521(),
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}
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func (c *ECDSACurve) String() string {
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if c.Curve == nil {
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return ""
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}
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return strings.ToLower(strings.Replace(c.Curve.Params().Name, "-", "", 1))
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}
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func (c *ECDSACurve) Set(str string) error {
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if v, ok := supportedECDSACurves[str]; ok {
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*c = ECDSACurve{v}
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return nil
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}
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return fmt.Errorf("unsupported curve '%s', should be one of: %s", str, strings.Join(ecdsaCurves(), ", "))
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}
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func (c *ECDSACurve) Type() string {
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return "ecdsaCurve"
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}
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func (c *ECDSACurve) Description() string {
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return fmt.Sprintf("SSH ECDSA public key curve (%s)", strings.Join(ecdsaCurves(), ", "))
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}
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func ecdsaCurves() []string {
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keys := make([]string, 0, len(supportedECDSACurves))
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for k := range supportedECDSACurves {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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return keys
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}
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