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transport: add ValidateSecureEndpoints
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goes through all endpoints checking if they abide by given tls info
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Anthony Romano committed Aug 3, 2016
1 parent 635bf35 commit 9005e62
Showing 1 changed file with 49 additions and 0 deletions.
49 changes: 49 additions & 0 deletions pkg/transport/tls.go
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// Copyright 2016 The etcd 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 transport

import (
"fmt"
"strings"
"time"
)

// ValidateSecureEndpoints scans the given endpoints against tls info, returning only those
// endpoints that could be validated as secure.
func ValidateSecureEndpoints(tlsInfo TLSInfo, eps []string) ([]string, error) {
t, err := NewTransport(tlsInfo, 5*time.Second)
if err != nil {
return nil, err
}
var errs []string
var endpoints []string
for _, ep := range eps {
if !strings.HasPrefix(ep, "https://") {
errs = append(errs, fmt.Sprintf("%q is insecure", ep))
continue
}
conn, cerr := t.Dial("tcp", ep[len("https://"):])
if cerr != nil {
errs = append(errs, fmt.Sprintf("%q failed to dial (%v)", ep, cerr))
continue
}
conn.Close()
endpoints = append(endpoints, ep)
}
if len(errs) != 0 {
err = fmt.Errorf("%s", strings.Join(errs, ","))
}
return endpoints, err
}

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