Fix format for adding sm4

Signed-off-by: Jarvis Zheng <jiayang@hust.edu.cn>

encryption/encryption.cc

@@ -215,11 +215,12 @@ Status NewAESCTRCipherStream(EncryptionMethod method, const std::string& key,
       cipher = EVP_aes_256_ctr();
       break;
     case EncryptionMethod::kSM4_CTR:
-    // Openssl support SM4 after 1.1.1 release version.
 #if OPENSSL_VERSION_NUMBER < 0x1010100fL
-      return Status::InvalidArgument("Unsupport SM4 encryption method under OpenSSL version: " +
-                                     std::string(OPENSSL_VERSION_TEXT));
+      return Status::InvalidArgument(
+          "Unsupport SM4 encryption method under OpenSSL version: " +
+          std::string(OPENSSL_VERSION_TEXT));
 #else
+      // Openssl support SM4 after 1.1.1 release version.
       cipher = EVP_sm4_ctr();
       break;
 #endif

encryption/encryption.h

@@ -42,7 +42,8 @@ namespace encryption {
 // TODO: OpenSSL Lib does not export SM4_BLOCK_SIZE by now.
 // Need to remove SM4_BLOCK_Size once Openssl lib support the definition.
 // SM4 uses 128-bit block size as AES.
-// Ref: https://github.com/openssl/openssl/blob/OpenSSL_1_1_1-stable/include/crypto/sm4.h#L24
+// Ref:
+// https://github.com/openssl/openssl/blob/OpenSSL_1_1_1-stable/include/crypto/sm4.h#L24
 #define SM4_BLOCK_SIZE 16
 
 class AESCTRCipherStream : public BlockAccessCipherStream {

encryption/encryption_test.cc

@@ -56,8 +56,8 @@ class EncryptionTest
       case EncryptionMethod::kAES256_CTR:
         cipher = EVP_aes_256_ctr();
         break;
-      // Openssl support SM4 after 1.1.1 release version.
 #if OPENSSL_VERSION_NUMBER >= 0x1010100fL
+      // Openssl support SM4 after 1.1.1 release version.
       case EncryptionMethod::kSM4_CTR:
         cipher = EVP_sm4_ctr();
         break;