added codes of Crypt in CMUtil

2023-07-21 19:33:38 +08:00
parent 626cb2806e
commit 3103321585
11 changed files with 20231 additions and 1 deletions
--- a/src/crypt/Overflow.cpp
+++ b/src/crypt/Overflow.cpp
@@ -0,0 +1,93 @@
+#include<hgl/type/DataType.h>
+
+namespace hgl
+{
+    namespace crypt
+    {
+        /**
+        * 溢出加密
+        * @param target 加密后的数据存放区
+        * @param source 加密前的数据存放区
+        * @param size 数据长度
+        * @param key 密码
+        * @param key_size 密码长度
+        */
+        void OverflowEncrypt(void *target, void *source, int size, void *key, int key_size)
+        {
+            int n;
+            uint8 *key_p;
+            uint8 *tp, *sp;
+
+            n = key_size;
+            key_p = (uint8 *)key;
+
+            tp = (uint8 *)target;
+            sp = (uint8 *)source;
+
+            while (size--)
+            {
+                uint tmp = (*sp) + (*key_p);
+
+                if (tmp > 0xFF)
+                    *tp = tmp - 0x100;
+                else
+                    *tp = tmp;
+
+                *key_p ^= *tp;
+
+                tp++;
+                sp++;
+
+                if (--n == 0)
+                {
+                    n = key_size;
+                    key_p = (uint8 *)key;
+                }
+                else
+                    key_p++;
+            }
+        }
+
+        /**
+        * 溢出解密
+        * @param target 解密后的数据存放区
+        * @param source 解密前的数据存放区
+        * @param size 数据长度
+        * @param key 密码
+        * @param keysize 密码长度
+        */
+        void OverflowDecrypt(void *target, void *source, int size, void *key, int key_size)
+        {
+            int n;
+            uint8 *key_p;
+            uint8 *tp, *sp;
+
+            n = key_size;
+            key_p = (uint8 *)key;
+
+            tp = (uint8 *)target;
+            sp = (uint8 *)source;
+
+            while (size--)
+            {
+                if (*key_p > *sp)
+                    *tp = *sp + 0x100 - (*key_p);
+                else
+                    *tp = *sp - (*key_p);
+
+                *key_p ^= *sp;
+
+                tp++;
+                sp++;
+
+                if (--n == 0)
+                {
+                    n = key_size;
+                    key_p = (uint8 *)key;
+                }
+                else
+                    key_p++;
+            }
+        }
+    }//namespace crypt
+}//namespace hgl