48 lines
810 B
Go
48 lines
810 B
Go
package data
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"io"
|
|
)
|
|
|
|
/*
|
|
[I2P Hash]
|
|
Accurate for version 0.9.49
|
|
|
|
Description
|
|
Represents the SHA256 of some data.
|
|
|
|
Contents
|
|
32 bytes
|
|
|
|
[I2P Hash]:
|
|
*/
|
|
|
|
// Hash is the represenation of an I2P Hash.
|
|
//
|
|
// https://geti2p.net/spec/common-structures#hash
|
|
type Hash [32]byte
|
|
|
|
func (h Hash) Bytes() [32]byte {
|
|
return h
|
|
}
|
|
|
|
// HashData returns the SHA256 sum of a []byte input as Hash.
|
|
func HashData(data []byte) (h Hash) {
|
|
// log.Println("Hashing Data:", data)
|
|
h = sha256.Sum256(data)
|
|
return
|
|
}
|
|
|
|
// HashReader returns the SHA256 sum from all data read from an io.Reader.
|
|
// return error if one occurs while reading from reader
|
|
func HashReader(r io.Reader) (h Hash, err error) {
|
|
sha := sha256.New()
|
|
_, err = io.Copy(sha, r)
|
|
if err == nil {
|
|
d := sha.Sum(nil)
|
|
copy(h[:], d)
|
|
}
|
|
return
|
|
}
|