80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
// +build engines
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/*
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Copyright NetFoundry Inc.
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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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https://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 certtools
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import (
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log "github.com/sirupsen/logrus"
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"os"
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"path/filepath"
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"plugin"
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"sync"
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)
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var supportedEngines = []string{
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"siometrics.so",
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"authenta.so",
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}
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var loaded = false
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var loadMu = sync.Mutex{}
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func loadEngines() {
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if loaded {
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return
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}
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loadMu.Lock()
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defer loadMu.Unlock()
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if loaded {
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return
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}
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execPath, _ := os.Executable()
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execDir := filepath.Dir(execPath)
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log.Debug("execpath ", execDir)
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for _, lib := range supportedEngines {
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libPath := filepath.Join(execDir, lib)
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log.Debug("trying", libPath)
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l, err := plugin.Open(libPath)
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if err != nil {
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log.Debugf("failed load engine %s: %s\n", libPath, err.Error())
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continue
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}
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e, err := l.Lookup("Engine")
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if err != nil {
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log.Warnln("Symbol 'Engine' not found in ", lib, libPath)
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continue
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}
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if engine, ok := e.(Engine); ok {
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log.Debugf("found engine '%s' in %s(%s)\n", engine.Id(), lib, libPath)
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engines[engine.Id()] = engine
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} else {
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log.Warnf("Engine instance is not valid in (%s)\n", lib)
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continue
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}
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}
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loaded = true
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}
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