forked from FactomProject/factomd
/
metadata.go
107 lines (86 loc) · 2.11 KB
/
metadata.go
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package securedb
import (
"bytes"
"encoding/binary"
"fmt"
"os"
"github.com/FactomProject/factomd/common/primitives"
llog "github.com/FactomProject/factomd/log"
)
var _ = fmt.Sprint
type SecureDBMetaData struct {
Salt primitives.ByteSlice
Challenge primitives.ByteSlice
}
func NewSecureDBMetaData() *SecureDBMetaData {
s := new(SecureDBMetaData)
return s
}
func (m *SecureDBMetaData) IsSameAs(b *SecureDBMetaData) bool {
if !m.Salt.IsSameAs(&b.Salt) {
return false
}
if !m.Challenge.IsSameAs(&b.Challenge) {
return false
}
return true
}
func (m *SecureDBMetaData) UnmarshalBinary(data []byte) (err error) {
_, err = m.UnmarshalBinaryData(data)
return
}
func (m *SecureDBMetaData) UnmarshalBinaryData(data []byte) (newData []byte, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("Error unmarshalling: %v", r)
llog.LogPrintf("recovery", "Error unmarshalling: %v", r)
}
}()
newData = data
slen, err := bytesToUint32(newData[:4])
if err != nil {
return nil, err
}
m.Salt.Bytes = make([]byte, slen)
copy(m.Salt.Bytes, newData[4:slen+4])
newData = newData[slen+4:]
clen, err := bytesToUint32(newData[:4])
if err != nil {
return nil, err
}
m.Challenge.Bytes = make([]byte, clen)
copy(m.Challenge.Bytes, newData[4:clen+4])
newData = newData[clen+4:]
return
}
func (m *SecureDBMetaData) MarshalBinary() (rval []byte, err error) {
defer func(pe *error) {
if *pe != nil {
fmt.Fprintf(os.Stderr, "SecureDBMetaData.MarshalBinary err:%v", *pe)
}
}(&err)
buf := primitives.NewBuffer(nil)
buf.Write(intToBytes(len(m.Salt.Bytes)))
data, err := m.Salt.MarshalBinary()
if err != nil {
return nil, err
}
buf.Write(data)
buf.Write(intToBytes(len(m.Challenge.Bytes)))
data, err = m.Challenge.MarshalBinary()
if err != nil {
return nil, err
}
buf.Write(data)
return buf.DeepCopyBytes(), nil
}
func bytesToUint32(data []byte) (ret uint32, err error) {
buf := bytes.NewBuffer(data)
err = binary.Read(buf, binary.BigEndian, &ret)
return
}
func intToBytes(val int) []byte {
b := make([]byte, 4)
binary.BigEndian.PutUint32(b, uint32(val))
return b
}