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|
package main
import (
"fmt"
"os"
"github.com/gibheer/pki"
)
func loadPrivateKey(path string) (pki.PrivateKey, error) {
if path == "" {
return nil, fmt.Errorf("no path given")
}
var err error
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
info, err := file.Stat()
if err != nil {
return nil, err
}
if info.Mode().Perm().String()[4:] != "------" {
return nil, fmt.Errorf("private key must not be readable for group or world")
}
pems, err := parseFile(file)
if err != nil {
return nil, err
}
if len(pems) > 1 {
return nil, fmt.Errorf("more than one object in file")
}
var pk pki.PrivateKey
for key, parts := range pems {
if len(parts) > 1 {
return nil, fmt.Errorf("more than one object found")
}
switch key {
case pki.PemLabelRsa:
pk, err = pki.LoadPrivateKeyRsa(parts[0])
case pki.PemLabelEd25519:
pk, err = pki.LoadPrivateKeyEd25519(parts[0])
case pki.PemLabelEcdsa:
pk, err = pki.LoadPrivateKeyEcdsa(parts[0])
default:
return nil, fmt.Errorf("unknown private key format %s", key)
}
}
return pk, err
}
|
