4d9c43593d
This introduce a new internal package to deal with the explicit clearing of data (such as private keys) in byte slices, byte arrays (32 and 64-bytes long), and multi-precision "big" integers. Benchmarks from a xeon e3 (Xor is the zeroing funcion which Bytes replaces): BenchmarkXor32 30000000 52.1 ns/op BenchmarkXor64 20000000 91.5 ns/op BenchmarkRange32 50000000 31.8 ns/op BenchmarkRange64 30000000 49.5 ns/op BenchmarkBytes32 200000000 10.1 ns/op BenchmarkBytes64 100000000 15.4 ns/op BenchmarkBytea32 1000000000 2.24 ns/op BenchmarkBytea64 300000000 4.46 ns/op Removes an XXX from the votingpool package.
83 lines
1.6 KiB
Go
83 lines
1.6 KiB
Go
package zero_test
|
|
|
|
import (
|
|
"testing"
|
|
|
|
. "github.com/btcsuite/btcwallet/internal/zero"
|
|
)
|
|
|
|
var (
|
|
bytes32 = make([]byte, 32) // typical key size
|
|
bytes64 = make([]byte, 64) // passphrase hash size
|
|
bytea32 = new([32]byte)
|
|
bytea64 = new([64]byte)
|
|
)
|
|
|
|
// xor is the "slow" byte zeroing implementation which this package
|
|
// originally replaced. If this function benchmarks faster than the
|
|
// functions exported by this package in a future Go version (perhaps
|
|
// by calling runtime.memclr), replace the "optimized" versions with
|
|
// this.
|
|
func xor(b []byte) {
|
|
for i := range b {
|
|
b[i] ^= b[i]
|
|
}
|
|
}
|
|
|
|
// zrange is an alternative zero implementation that, while currently
|
|
// slower than the functions provided by this package, may be faster
|
|
// in a future Go release. Switch to this or the xor implementation
|
|
// if they ever become faster.
|
|
func zrange(b []byte) {
|
|
for i := range b {
|
|
b[i] = 0
|
|
}
|
|
}
|
|
|
|
func BenchmarkXor32(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
xor(bytes32)
|
|
}
|
|
}
|
|
|
|
func BenchmarkXor64(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
xor(bytes64)
|
|
}
|
|
}
|
|
|
|
func BenchmarkRange32(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
zrange(bytes32)
|
|
}
|
|
}
|
|
|
|
func BenchmarkRange64(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
zrange(bytes64)
|
|
}
|
|
}
|
|
|
|
func BenchmarkBytes32(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Bytes(bytes32)
|
|
}
|
|
}
|
|
|
|
func BenchmarkBytes64(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Bytes(bytes64)
|
|
}
|
|
}
|
|
|
|
func BenchmarkBytea32(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Bytea32(bytea32)
|
|
}
|
|
}
|
|
|
|
func BenchmarkBytea64(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Bytea64(bytea64)
|
|
}
|
|
}
|