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package cmd
import (
"aead.dev/minisign"
"bytes"
"crypto/ed25519"
"encoding/base64"
"encoding/binary"
"fmt"
verify "github.com/axtloss/fsverify/core"
"github.com/axtloss/fsverify/verifysetup/core"
"github.com/spf13/cobra"
bolt "go.etcd.io/bbolt"
"math"
"os"
"strconv"
"sync"
)
func NewSetupCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "setup",
Short: "Set up fsverify",
RunE: SetupCommand,
SilenceUsage: true,
}
return cmd
}
func checksumBlock(blockStart int, blockEnd int, bundleSize int, diskBytes []byte, nodeChannel chan verify.Node, n int, waitGroup *sync.WaitGroup) {
defer waitGroup.Done()
defer close(nodeChannel)
var reader *bytes.Reader
node := verify.Node{}
blockCount := math.Floor(float64(bundleSize / 2000))
for i := 0; i < int(blockCount); i++ {
reader = bytes.NewReader(diskBytes)
block, err := core.ReadBlock(i*2000, (i*2000)+2000, reader)
if err != nil {
fmt.Printf("%d:: %d attempted reading from %d to %d. Error %s\n", blockStart, i, i*2000, (i*2000)+2000, err)
return
}
node, err = core.CreateNode(i*2000, (i*2000)+2000, block, &node, strconv.Itoa(n))
if err != nil {
fmt.Printf("%d:: Attempted creating node for range %d - %d. Error %s\n", blockStart, i*2000, (i*2000)+2000, err)
return
}
nodeChannel <- node
}
block, err := core.ReadBlock(int(blockCount*2000), len(diskBytes), reader)
if err != nil {
fmt.Printf("%d:: final attempted reading from %d to %d. Error %s\n", blockStart, int(blockCount*2000)+2000, len(diskBytes), err)
return
}
finalNode, err := core.CreateNode(blockStart+int(blockCount*2000)+2000, len(diskBytes), block, &node, strconv.Itoa(n))
nodeChannel <- finalNode
fmt.Printf("Node from %d to %d finished.\n", blockStart, blockEnd)
}
func SetupCommand(_ *cobra.Command, args []string) error {
if len(args) != 3 {
return fmt.Errorf("Usage: verifysetup setup [partition] [procCount] [fsverify partition output] <minisign directory>")
}
var minisignDir string
if len(args) != 4 {
minisignDir = "./minisign/"
} else {
minisignDir = args[3]
}
procCount, err := strconv.Atoi(args[1])
if err != nil {
return err
}
fmt.Println("Using partition: ", args[0])
disk, err := os.Open(args[0])
if err != nil {
return err
}
defer disk.Close()
fmt.Println("Reading from disk")
diskInfo, err := disk.Stat()
if err != nil {
return err
}
diskSize := diskInfo.Size()
bundleSize := math.Floor(float64(diskSize / int64(procCount)))
blockCount := math.Ceil(float64(bundleSize / 2000))
lastBlockSize := int(diskSize) - int(bundleSize)*procCount
fmt.Println(diskSize)
fmt.Println(int(bundleSize))
fmt.Println(lastBlockSize)
diskBytes := make([]byte, diskSize)
_, err = disk.Read(diskBytes)
if err != nil {
return err
}
reader := bytes.NewReader(diskBytes)
var waitGroup sync.WaitGroup
nodeChannels := make([]chan verify.Node, procCount+1)
for i := 0; i < procCount; i++ {
diskBytesCopy, err := verify.CopyByteArea(i*(int(bundleSize)), (i+1)*(int(bundleSize)), reader)
if err != nil {
return err
}
waitGroup.Add(1)
fmt.Printf("Starting thread %d with blockStart %d and blockEnd %d\n", i, i*(int(bundleSize)), (i+1)*(int(bundleSize)))
nodeChannels[i] = make(chan verify.Node, int(math.Ceil(bundleSize/2000)))
go checksumBlock(i*(int(bundleSize)), (i+1)*(int(bundleSize)), int(bundleSize), diskBytesCopy, nodeChannels[i], i, &waitGroup)
}
waitGroup.Wait()
db, err := verify.OpenDB("./fsverify.db", false)
if err != nil {
return err
}
for i := 0; i < procCount; i++ {
channel := nodeChannels[i]
err = db.Batch(func(tx *bolt.Tx) error {
for j := 0; j < int(blockCount); j++ {
err := core.AddNode(<-channel, tx)
if err != nil {
return err
}
}
return nil
})
if err != nil {
return err
}
}
signature, err := core.SignDatabase("./fsverify.db", minisignDir)
if err != nil {
return err
}
fmt.Println(string(signature))
sig := minisign.Signature{}
err = sig.UnmarshalText(signature)
if err != nil {
return err
}
var UntrustedSignature [2 + 8 + ed25519.SignatureSize]byte
binary.LittleEndian.PutUint16(UntrustedSignature[:2], sig.Algorithm)
binary.LittleEndian.PutUint64(UntrustedSignature[2:10], sig.KeyID)
copy(UntrustedSignature[10:], sig.Signature[:])
unsignedHash := base64.StdEncoding.EncodeToString(UntrustedSignature[:])
signedHash := base64.StdEncoding.EncodeToString(sig.CommentSignature[:])
fsverifydb, err := os.Open("./fsverify.db")
if err != nil {
return err
}
defer db.Close()
fmt.Println("Reading from disk")
dbInfo, err := fsverifydb.Stat()
if err != nil {
return err
}
dbSize := dbInfo.Size()
verifyPart := make([]byte, 200+dbSize)
header, err := core.CreateHeader(unsignedHash, signedHash, int(diskSize), int(dbSize))
fmt.Printf("%x\n", header)
database := make([]byte, dbSize)
_, err = fsverifydb.Read(database)
if err != nil {
return err
}
copy(verifyPart, header)
copy(verifyPart[200:], database)
verifyfs, err := os.Create(args[2])
if err != nil {
return err
}
defer verifyfs.Close()
_, err = verifyfs.Write(verifyPart)
return err
}
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