feat: crypto

crypto/crypto.go

@@ -1,17 +1,55 @@
 package crypto
 
 import (
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/hex"
+
 	"golang.org/x/crypto/bcrypt"
 )
 
+// DefaultCost 最小值=4 最大值=31 默认值=10
+var DefaultCost = 10
+
 // HashPassword 加密密码
 func HashPassword(password string) (string, error) {
-	bytes, err := bcrypt.GenerateFromPassword([]byte(password), 10)
+	// Prefix + Cost + Salt + Hashed Text
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), DefaultCost)
 	return string(bytes), err
 }
 
-// CheckPasswordHash 校验密码
-func CheckPasswordHash(password, hash string) bool {
+// HashPasswordWithSalt 对密码进行加盐哈希处理
+func HashPasswordWithSalt(password, salt string) (string, error) {
+	// 将密码和盐组合
+	combined := []byte(password + salt)
+
+	// 计算哈希值
+	hash := sha256.Sum256(combined)
+
+	// 将哈希值转换为十六进制字符串
+	return hex.EncodeToString(hash[:]), nil
+}
+
+// VerifyPassword 验证密码是否正确
+func VerifyPassword(password, hash string) bool {
 	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
 	return err == nil
 }
+
+// VerifyPasswordWithSalt 验证密码是否正确
+func VerifyPasswordWithSalt(password, salt, hashedPassword string) bool {
+	// 对输入的密码和盐进行哈希处理
+	newHash, _ := HashPasswordWithSalt(password, salt)
+	// 比较哈希值是否相同
+	return newHash == hashedPassword
+}
+
+// GenerateSalt 生成指定长度的盐
+func GenerateSalt(length int) (string, error) {
+	salt := make([]byte, length)
+	_, err := rand.Read(salt)
+	if err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(salt), nil
+}