Code the encoder and the decoder, compile them, etc.

eliotttak · eliotttak · commit 9de9f6e87dd4 · 2025-08-14T17:57:05.000+02:00
diff --git a/bin/GoFileEncoder.exe b/bin/GoFileEncoder.exe
diff --git a/build.bat b/build.bat
@@ -0,0 +1,4 @@
+@echo off
+echo Building...
+go build -o .\bin\GoFileEncoder.exe .\src\
+echo Built
diff --git a/build.sh b/build.sh
@@ -0,0 +1,5 @@
+#!bin/bash
+
+echo "Building..."
+go build -o ./bin/GoFileEncoder ./src/
+echo "Built"
diff --git a/buildrun.bat b/buildrun.bat
@@ -0,0 +1,3 @@
+@echo off
+call .\build.bat
+.\bin\GoFileEncoder.exe
diff --git a/buildrun.sh b/buildrun.sh
@@ -0,0 +1,3 @@
+#!bin/bash
+./build.sh
+./bin/GoFileEncoder
diff --git a/go.mod b/go.mod
@@ -0,0 +1,7 @@
+module GoFileEncoder
+
+go 1.24.2
+
+require github.com/sqweek/dialog v0.0.0-20240226140203-065105509627
+
+require github.com/TheTitanrain/w32 v0.0.0-20200114052255-2654d97dbd3d // indirect
diff --git a/go.sum b/go.sum
@@ -0,0 +1,6 @@
+github.com/TheTitanrain/w32 v0.0.0-20180517000239-4f5cfb03fabf h1:FPsprx82rdrX2jiKyS17BH6IrTmUBYqZa/CXT4uvb+I=
+github.com/TheTitanrain/w32 v0.0.0-20180517000239-4f5cfb03fabf/go.mod h1:peYoMncQljjNS6tZwI9WVyQB3qZS6u79/N3mBOcnd3I=
+github.com/TheTitanrain/w32 v0.0.0-20200114052255-2654d97dbd3d h1:2xp1BQbqcDDaikHnASWpVZRjibOxu7y9LhAv04whugI=
+github.com/TheTitanrain/w32 v0.0.0-20200114052255-2654d97dbd3d/go.mod h1:peYoMncQljjNS6tZwI9WVyQB3qZS6u79/N3mBOcnd3I=
+github.com/sqweek/dialog v0.0.0-20240226140203-065105509627 h1:2JL2wmHXWIAxDofCK+AdkFi1KEg3dgkefCsm7isADzQ=
+github.com/sqweek/dialog v0.0.0-20240226140203-065105509627/go.mod h1:/qNPSY91qTz/8TgHEMioAUc6q7+3SOybeKczHMXFcXw=
diff --git a/run.bat b/run.bat
@@ -0,0 +1,2 @@
+@echo off
+.\bin\GoFileEncoder.exe
diff --git a/run.sh b/run.sh
@@ -0,0 +1,2 @@
+#!bin/bash
+./bin/GoFileEncoder
diff --git a/src/GoFileEncoder.go b/src/GoFileEncoder.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"GoFileEncoder/src/decoder"
+	"GoFileEncoder/src/encoder"
+	"fmt"
+	"strings"
+	"time"
+)
+
+func main() {
+	fmt.Print("Que voulez-vous faire ?\n - Encoder un fichier (e)\n - Décoder un fichier (d)\n")
+	var rep string = ""
+
+	for !(rep == "e" || rep == "d") {
+		fmt.Print("(e/d)>>>")
+		fmt.Scanf("%s\n", &rep)
+		rep = strings.ToLower(rep)
+		time.Sleep(300 * time.Millisecond)
+	}
+
+	switch rep {
+	case "e":
+		encoder.Encoder()
+	case "d":
+		decoder.Decoder()
+	}
+}
diff --git a/src/decoder/decoder.go b/src/decoder/decoder.go
@@ -0,0 +1,253 @@
+package decoder
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/sqweek/dialog"
+)
+
+func formatDuration(duration time.Duration) string {
+	var hours int = int(duration.Hours())
+	var minutes int = int(duration.Minutes()) % 60
+	var seconds int = int(duration.Seconds()) % 60
+	var milliseconds int = int(duration.Milliseconds()) % 1000
+	return fmt.Sprintf("%d heure(s), %02d minute(s) et %02d.%03d seconde(s)", hours, minutes, seconds, milliseconds)
+}
+
+func removeExtentions(path string, nExtensions int) string {
+	var result string = path
+	for x := 0; x < nExtensions; x++ {
+		var ext string = filepath.Ext(result)
+		if ext == "" {
+			break
+		}
+		result = strings.TrimSuffix(result, ext)
+	}
+	return result
+}
+
+func Decoder() {
+	fmt.Println("Appuyez sur [Entrée] pour sélectionner un fichier...")
+	fmt.Scanln()
+	var cryptedFilePath string
+	var err error
+	var attempts int = 0
+	for {
+		cryptedFilePath, err = dialog.File().
+			Filter("Fichiers binaires encodés (.enc.bin)", "enc.bin").
+			Filter("Tous les fichiers", "*").
+			Title("Sélectionner un fichier").
+			Load()
+
+		if err == nil {
+			break
+		} else {
+			fmt.Println("Tentative échouée : " + err.Error())
+			attempts++
+		}
+
+		if attempts == 3 {
+			fmt.Println("Trop de tentatives échouées")
+			return
+		}
+	}
+
+	fmt.Printf("Vous avez sélectionné ce fichier : %s.\n\n", cryptedFilePath)
+
+	var pwdStr string
+
+	fmt.Print("Entrez le mot de passe : ")
+	fmt.Scanf("%s", &pwdStr)
+
+	var pwd []byte = []byte(pwdStr)
+
+	var pwdLen int = len(pwd)
+
+	fmt.Println("Appuyez sur [Entrée] pour sauvegarder le fichier...")
+	fmt.Scanln()
+
+	var originalFileProposition string
+
+	if strings.HasSuffix(cryptedFilePath, ".enc.bin") {
+		originalFileProposition = removeExtentions(cryptedFilePath, 2)
+	} else {
+		originalFileProposition = removeExtentions(cryptedFilePath, 1)
+	}
+
+	var originalFilePath string
+
+	for {
+		originalFilePath, err = dialog.File().
+			Title("Sauvegardez un fichier").
+			SetStartFile(filepath.Base(originalFileProposition)).
+			Save()
+
+		if err == nil {
+			break
+		} else {
+			fmt.Println("Tentative échouée : " + err.Error())
+			attempts++
+		}
+
+		if attempts == 3 {
+			fmt.Println("Trop de tentatives échouées")
+			return
+		}
+	}
+
+	fmt.Printf("Vous avez sélectionné ce fichier : %s.\n\n", originalFilePath)
+
+	const blockSize int = 1024 * 16
+
+	var (
+		blockStart       int64 = 0
+		cryptedFile      *os.File
+		cryptedFileBlock []byte = make([]byte, blockSize)
+		originalFile     *os.File
+	)
+
+	attempts = 0
+	for {
+		cryptedFile, err = os.Open(cryptedFilePath)
+
+		if err == nil {
+			defer cryptedFile.Close()
+			break
+		} else {
+			fmt.Println("Tentative échouée : " + err.Error())
+			attempts++
+		}
+
+		if attempts == 3 {
+			fmt.Println("Trop de tentatives échouées")
+			return
+		}
+	}
+
+	attempts = 0
+	for {
+		originalFile, err = os.Create(originalFilePath)
+
+		if err == nil {
+			defer originalFile.Close()
+			break
+		} else {
+			fmt.Println("Tentative échouée : " + err.Error())
+			attempts++
+		}
+
+		if attempts == 3 {
+			fmt.Println("Trop de tentatives échouées")
+			return
+		}
+	}
+
+	var (
+		timeBefore  time.Time
+		timeAfter   time.Time
+		timeBetween time.Duration
+	)
+
+	for {
+		attempts = 0
+		for {
+			_, err = cryptedFile.Seek(blockStart, io.SeekStart)
+			if err == nil {
+				break
+			} else {
+				fmt.Println("Tentative échouée (line 163) : " + err.Error())
+				attempts++
+			}
+
+			if attempts == 3 {
+				fmt.Println("Trop de tentatives échouées")
+				return
+			}
+		}
+
+		attempts = 0
+		for {
+			_, err = cryptedFile.Read(cryptedFileBlock)
+			if err == nil {
+				break
+			} else if err == io.EOF {
+				timeAfter = time.Now()
+
+				timeBetween = timeAfter.Sub(timeBefore)
+				fmt.Printf("Fichier décodé en %s.\n", formatDuration(timeBetween))
+				return
+			} else {
+				fmt.Println("Tentative échouée (line 185) : " + err.Error())
+				attempts++
+			}
+
+			if attempts == 3 {
+				fmt.Println("Trop de tentatives échouées")
+				return
+			}
+
+		}
+
+		var originalFileBlock []byte = []byte{}
+
+		var cryptedByte byte
+
+		var pwdIndex int = 0
+
+		timeBefore = time.Now()
+
+		for _, cryptedByte = range cryptedFileBlock {
+			if pwdIndex >= pwdLen {
+				pwdIndex = 0
+			}
+
+			var pwdByte byte = pwd[pwdIndex]
+			var originalByte byte = cryptedByte ^ pwdByte
+
+			originalFileBlock = append(originalFileBlock, originalByte)
+
+			pwdIndex++
+		}
+
+		attempts = 0
+		for {
+			_, err = originalFile.Seek(0, io.SeekEnd)
+
+			if err == nil {
+				break
+			} else {
+				fmt.Println("Tentative échouée (line 208): " + err.Error())
+				attempts++
+			}
+
+			if attempts == 3 {
+				fmt.Println("Trop de tentatives échouées")
+				return
+			}
+		}
+
+		attempts = 0
+		for {
+			_, err = originalFile.Write(originalFileBlock)
+
+			if err == nil {
+				break
+			} else {
+				fmt.Println("Tentative échouée : " + err.Error())
+				attempts++
+			}
+
+			if attempts == 3 {
+				fmt.Println("Trop de tentatives échouées")
+				return
+			}
+		}
+
+		blockStart += 16 * 1024
+	}
+}
diff --git a/src/encoder/encoder.go b/src/encoder/encoder.go

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+@echo off`
	`2`	`+call .\build.bat`
	`3`	`+.\bin\GoFileEncoder.exe`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+#!bin/bash`
	`2`	`+./build.sh`
	`3`	`+./bin/GoFileEncoder`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+@echo off`
	`2`	`+.\bin\GoFileEncoder.exe`