update

CHANGELOG.md

@@ -15,6 +15,7 @@ In progress...
 - Example `_cmd/echo_service`: append docker-compose examples
 - Example `_cmd/anon_messenger`: append docker-compose examples
 - Projects `tools`: append encryptor application
+- Projects `tools`: append pmanager application
 - Projects `tools`: refactoring storage application
 
 ### CHANGES
@@ -32,6 +33,7 @@ In progress...
 ### BUG FIXES
 
 - Project `hidden_lake/messenger`: append checks pStateManager.GetWrapperDB().Get() on nil
+- Package `crypto/entropy`: fix range hashes with one input data
 
 <!-- ... -->
 

cmd/tools/pmanager/README.md

@@ -0,0 +1,19 @@
+# PManager
+
+> Stateless password manager
+
+```bash
+usage: 
+    ./main [service-name]
+stdin:
+    [master-key]EOF
+```
+
+EOF - End of File (Ctrl+D)
+
+## Example
+
+```bash
+$ echo "master-key" | go run . service-name login
+fsJ5+QUz5nv/JK3VdqYWqzqQoMy0pg7FqQQtQKq2cnw=
+```

cmd/tools/pmanager/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"encoding/base64"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/number571/go-peer/pkg/crypto/entropy"
+	"github.com/number571/go-peer/pkg/crypto/hashing"
+)
+
+const (
+	workSize = 20
+)
+
+func main() {
+	if len(os.Args) != 3 {
+		panic(fmt.Sprintf(
+			"usage:\n\t%s\nstdin:\n\t%s\n\n",
+			"./main [service] [login]",
+			"[master-key]EOF",
+		))
+	}
+
+	var (
+		service = []byte(os.Args[1])
+		login   = []byte(os.Args[2])
+	)
+
+	booster := entropy.NewEntropyBooster(workSize, login)
+	extendedKey := booster.BoostEntropy(readUntilEOF())
+
+	passBytes := hashing.NewHMACSHA256Hasher(extendedKey, service).ToBytes()
+	fmt.Println(base64.StdEncoding.EncodeToString(passBytes))
+}
+
+func readUntilEOF() []byte {
+	res, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		panic(err)
+	}
+	return res
+}

cmd/tools/pmanager/pmanager_test.go

@@ -0,0 +1,5 @@
+package main
+
+import "testing"
+
+func TestNothing(t *testing.T) {}

pkg/crypto/entropy/entropy.go

@@ -32,7 +32,7 @@ func (p *sEntropyBooster) BoostEntropy(pData []byte) []byte {
 	for i := uint64(0); i < lim; i++ {
 		data = hashing.NewSHA256Hasher(bytes.Join(
 			[][]byte{
-				pData,
+				data,
 				p.fSalt,
 			},
 			[]byte{},

pkg/crypto/entropy/entropy_test.go

@@ -4,10 +4,14 @@ import (
 	"bytes"
 	"testing"
 
-	"github.com/number571/go-peer/pkg/crypto/hashing"
+	"github.com/number571/go-peer/pkg/encoding"
 	testutils "github.com/number571/go-peer/test/_data"
 )
 
+const (
+	tcHash = "57daf58ec9ea7be6dbcb8a67aea76bdcfa32db40a7a3cae3d90bc977dc293599"
+)
+
 func TestEntropy(t *testing.T) {
 	var (
 		msg  = []byte("hello, world!")
@@ -15,8 +19,7 @@ func TestEntropy(t *testing.T) {
 	)
 
 	hash := NewEntropyBooster(testutils.TCWorkSize, salt).BoostEntropy(msg)
-
-	if bytes.Equal(hash, hashing.NewSHA256Hasher(msg).ToBytes()) {
+	if encoding.HexEncode(hash) != tcHash {
 		t.Error("hash is correct?")
 		return
 	}