You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
689 B
35 lines
689 B
package randentropy
|
|
|
|
import (
|
|
crand "crypto/rand"
|
|
"github.com/tendermint/tendermint/vm/sha3"
|
|
"io"
|
|
)
|
|
|
|
var Reader io.Reader = &randEntropy{}
|
|
|
|
type randEntropy struct {
|
|
}
|
|
|
|
func (*randEntropy) Read(bytes []byte) (n int, err error) {
|
|
readBytes := GetEntropyCSPRNG(len(bytes))
|
|
copy(bytes, readBytes)
|
|
return len(bytes), nil
|
|
}
|
|
|
|
// TODO: copied from crypto.go , move to sha3 package?
|
|
func Sha3(data []byte) []byte {
|
|
d := sha3.NewKeccak256()
|
|
d.Write(data)
|
|
|
|
return d.Sum(nil)
|
|
}
|
|
|
|
func GetEntropyCSPRNG(n int) []byte {
|
|
mainBuff := make([]byte, n)
|
|
_, err := io.ReadFull(crand.Reader, mainBuff)
|
|
if err != nil {
|
|
panic("reading from crypto/rand failed: " + err.Error())
|
|
}
|
|
return mainBuff
|
|
}
|