30 lines
710 B
Go
30 lines
710 B
Go
|
package prefer_openssl
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"regexp"
|
||
|
|
)
|
||
|
|
|
||
|
|
// filePreferOpenSSL tells us if OpenSSL is faster than Go GCM on this machine.
|
||
|
|
// Go GCM is fastern when the CPU has AES instructions and Go is v1.6 or higher.
|
||
|
|
//
|
||
|
|
// See https://github.com/rfjakob/gocryptfs/issues/23#issuecomment-218286502
|
||
|
|
// for benchmarks.
|
||
|
|
//
|
||
|
|
// filePreferOpenSSL takes an explicit filename so it can be tested with saved
|
||
|
|
// cpuinfo files instead of /proc/cpuinfo.
|
||
|
|
func filePreferOpenSSL(file string) bool {
|
||
|
|
ci, err := ioutil.ReadFile(file)
|
||
|
|
if err != nil {
|
||
|
|
fmt.Println(err)
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
haveAes, err := regexp.Match(`(?m)^flags.*\baes\b`, ci)
|
||
|
|
if err != nil {
|
||
|
|
fmt.Println(err)
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return !haveAes
|
||
|
|
}
|