46 lines
894 B
Go
46 lines
894 B
Go
package main
|
|
|
|
// handle all io and de/encoding of data
|
|
|
|
import (
|
|
"encoding/pem"
|
|
"errors"
|
|
"io/ioutil"
|
|
)
|
|
|
|
var (
|
|
ErrBlockNotFound = errors.New("block not found")
|
|
)
|
|
|
|
// load a pem section from a file
|
|
func readSectionFromFile(path, btype string) ([]byte, error) {
|
|
raw, err := readFile(path)
|
|
if err != nil {
|
|
return raw, err
|
|
}
|
|
|
|
return decodeSection(raw, btype)
|
|
}
|
|
|
|
// read a file completely and report possible errors
|
|
func readFile(path string) ([]byte, error) {
|
|
raw, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
return EmptyByteArray, err
|
|
}
|
|
return raw, nil
|
|
}
|
|
|
|
// decode a pem encoded file and search for the specified section
|
|
func decodeSection(data []byte, btype string) ([]byte, error) {
|
|
rest := data
|
|
for len(rest) > 0 {
|
|
var block *pem.Block
|
|
block, rest = pem.Decode(rest)
|
|
if block.Type == btype {
|
|
return block.Bytes, nil
|
|
}
|
|
}
|
|
return EmptyByteArray, ErrBlockNotFound
|
|
}
|