Cryptography with void* in the interfaces.

[stg.git] / tests / test_bfstream.cpp

diff --git a/tests/test_bfstream.cpp b/tests/test_bfstream.cpp
index 18884d6da48d574f0885a9eabc31e508c8739d52..a3252c9eb9829380126f5025520d180e5c3c0d3d 100644 (file)
--- a/tests/test_bfstream.cpp
+++ b/tests/test_bfstream.cpp
@@ -1,11 +1,13 @@
 #include "tut/tut.hpp"
 
+#include "longstring.h"
+
 #include "stg/bfstream.h"
-#include "stg/os_int.h"
 
 #include <algorithm>
 #include <string>
 #include <cstring>
+#include <cstdint>
 
 namespace
 {
@@ -15,33 +17,86 @@ class TRACKER
     public:
         TRACKER() : m_lastSize(0), m_callCount(0), m_lastBlock(NULL) {}
         ~TRACKER() { delete[] m_lastBlock; }
-        void Call(const void * block, size_t size)
+        bool Call(const void * block, size_t size)
         {
         delete[] m_lastBlock;
         if (size > 0)
             {
             m_lastBlock = new char[size];
             memcpy(m_lastBlock,  block, size);
+            m_result.append(m_lastBlock, size);
             }
         else
             m_lastBlock = NULL;
         m_lastSize = size;
         ++m_callCount;
+        return true;
         }
         size_t LastSize() const { return m_lastSize; }
         size_t CallCount() const { return m_callCount; }
         const void * LastBlock() const { return m_lastBlock; }
 
+        const std::string& Result() const { return m_result; }
+
     private:
         size_t m_lastSize;
         size_t m_callCount;
         char * m_lastBlock;
+
+        std::string m_result;
+};
+
+bool DecryptCallback(const void * block, size_t size, void * data);
+
+class Decryptor
+{
+    public:
+        Decryptor(const std::string & key)
+            : m_stream(key, DecryptCallback, this)
+        {}
+
+        bool Call(const void * block, size_t size)
+        {
+            m_stream.Put(block, size);
+            return true;
+        }
+
+        bool Put(const void * block, size_t size)
+        {
+            const char * data = static_cast<const char *>(block);
+            size = strnlen(data, size);
+            m_result.append(data, size);
+            return true;
+        }
+
+        void Flush()
+        {
+            m_stream.Put(NULL, 0);
+        }
+
+        const std::string & Result() const { return m_result; }
+
+    private:
+        STG::DECRYPT_STREAM m_stream;
+        std::string m_result;
 };
 
-void Callback(const void * block, size_t size, void * data)
+bool EncryptCallback(const void * block, size_t size, void * data)
+{
+Decryptor & decryptor = *static_cast<Decryptor *>(data);
+return decryptor.Call(block, size);
+}
+
+bool DecryptCallback(const void * block, size_t size, void * data)
+{
+Decryptor & decryptor = *static_cast<Decryptor *>(data);
+return decryptor.Put(block, size);
+}
+
+bool Callback(const void * block, size_t size, void * data)
 {
 TRACKER & tracker = *static_cast<TRACKER *>(data);
-tracker.Call(block, size);
+return tracker.Call(block, size);
 }
 
 }
@@ -122,6 +177,7 @@ namespace tut
         STG::ENCRYPT_STREAM estream("pr7Hhen", Callback, &tracker);
         std::string source = "This is a test long string for checking stream encryption/decryption. \"abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ\"";
         char buffer[source.length() + 9];
+        memset(buffer, 0, sizeof(buffer));
 
         estream.Put(source.c_str(), source.length() + 1, true);
         ensure("Encryption long string LastSize()", tracker.LastSize() >= source.length() + 1);
@@ -137,4 +193,47 @@ namespace tut
         ensure_equals("Decrypt(Encrypt(source)) == source", std::string(buffer), source);
     }
 
+    template<>
+    template<>
+    void testobject::test<4>()
+    {
+        set_test_name("Check bfstream very long string processing");
+
+        Decryptor decryptor("pr7Hhen");
+        STG::ENCRYPT_STREAM estream("pr7Hhen", EncryptCallback, &decryptor);
+        //char buffer[source.length() + 9];
+        //memset(buffer, 0, sizeof(buffer));
+
+        estream.Put(longString.c_str(), longString.length() + 1, true);
+        //ensure("Encryption long string LastSize()", tracker.LastSize() >= source.length() + 1);
+        //ensure("Encryption long string LastBlock() != NULL", tracker.LastBlock() != NULL);
+        //memcpy(buffer, tracker.LastBlock(), std::min(tracker.LastSize(), sizeof(buffer)));
+
+        //dstream.Put(buffer, sizeof(buffer), true);
+        //ensure("Decryption long string LastSize() decryption", tracker.LastSize() >= sizeof(buffer));
+        //ensure("Decryption long string LastBlock() != NULL", tracker.LastBlock() != NULL);
+        //memcpy(buffer, tracker.LastBlock(), std::min(tracker.LastSize(), sizeof(buffer)));
+
+        ensure_equals("Decrypt(Encrypt(source)) == source", decryptor.Result(), longString);
+    }
+
+    template<>
+    template<>
+    void testobject::test<5>()
+    {
+        set_test_name("Check bfstream mechanics");
+
+        TRACKER tracker;
+        STG::ENCRYPT_STREAM stream("pr7Hhen", Callback, &tracker);
+        ensure_equals("CallCount() == 0 after construction", tracker.CallCount(), 0);
+
+        uint32_t block[2] = {0x12345678, 0x87654321};
+        stream.Put(&block[0], sizeof(block[0]));
+        ensure_equals("CallCount() == 0 after first put", tracker.CallCount(), 0);
+        stream.Put(&block[1], sizeof(block[1]));
+        ensure_equals("CallCount() == 1 after second put", tracker.CallCount(), 1);
+        stream.Put(&block[0], 0, true); // Check last callback
+        ensure_equals("CallCount() == 2 after third (null) put", tracker.CallCount(), 2);
+    }
+
 }