bcrypt

cmd/bcrypt/bcrypt.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+func main() {
+	switch os.Args[1] {
+	case "hash":
+		hash(os.Args[2])
+	case "compare":
+		compare(os.Args[2], os.Args[3])
+	default:
+		fmt.Printf("Invalid command: %v\n", os.Args[1])
+	}
+}
+
+func hash(password string) {
+	fmt.Printf("Hash the password %q\n", password)
+	hashedBytes, err := bcrypt.GenerateFromPassword(
+		[]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		fmt.Printf("error hashing: %v\n", err)
+		return
+	}
+	hash := string(hashedBytes)
+	fmt.Println(hash)
+}
+
+func compare(password, hash string) {
+	fmt.Printf("Compare the password %q with the hash %q\n", password, hash)
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	if err != nil {
+		fmt.Printf("Password is invalid: %v\n", password)
+		return
+	}
+	fmt.Println("Password is correct!")
+}