f

internal/infrastructure/external/huibo/crypto.go

@@ -0,0 +1,83 @@
+package huibo
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+)
+
+// MD5Encrypt 使用 AppKey 进行 MD5 加密
+func MD5Encrypt(data, appKey string) string {
+	h := md5.New()
+	h.Write([]byte(data + appKey))
+	return fmt.Sprintf("%x", h.Sum(nil))
+}
+
+// HMACSHA256Base64 使用 HMAC-SHA256 算法生成签名
+func HMACSHA256Base64(data, secret string) string {
+	m := hmac.New(sha256.New, []byte(secret))
+	_, _ = m.Write([]byte(data))
+	return base64.StdEncoding.EncodeToString(m.Sum(nil))
+}
+
+// EncryptAESGCMBase64 使用 AES-GCM 算法加密数据
+func EncryptAESGCMBase64(plainText, base64Key string) (string, error) {
+	key, err := base64.StdEncoding.DecodeString(base64Key)
+	if err != nil {
+		return "", err
+	}
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+
+	iv := make([]byte, 12)
+	if _, err = io.ReadFull(rand.Reader, iv); err != nil {
+		return "", err
+	}
+	ciphertext := gcm.Seal(nil, iv, []byte(plainText), nil)
+	out := append(iv, ciphertext...)
+	return base64.StdEncoding.EncodeToString(out), nil
+}
+
+// DecryptAESGCMBase64 使用 AES-GCM 算法解密数据
+func DecryptAESGCMBase64(encryptedBase64, base64Key string) (string, error) {
+	key, err := base64.StdEncoding.DecodeString(base64Key)
+	if err != nil {
+		return "", err
+	}
+	raw, err := base64.StdEncoding.DecodeString(encryptedBase64)
+	if err != nil {
+		return "", err
+	}
+	if len(raw) < 13 {
+		return "", errors.New("密文长度非法")
+	}
+
+	iv := raw[:12]
+	ciphertext := raw[12:]
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+	plain, err := gcm.Open(nil, iv, ciphertext, nil)
+	if err != nil {
+		return "", err
+	}
+	return string(plain), nil
+}