First steps with CryptClassCaesar

1 files changed, 35 insertions, 1 deletions

diff --git a/src/crypt/cryptclasscaesar.cpp b/src/crypt/cryptclasscaesar.cpp
index 23914a2..c1094ef 100644
--- a/src/crypt/cryptclasscaesar.cpp
+++ b/src/crypt/cryptclasscaesar.cpp
@@ -1,8 +1,12 @@
 #include "cryptclasscaesar.h"
 
+const int CryptClassCaesar::lowerBound = 0x30;
+const int CryptClassCaesar::upperBound = 0x7A;
+
 CryptClassCaesar::CryptClassCaesar()
 {
-
+    oldKey = -1;
+    buildMap();
 }
 
 CryptClassCaesar::~CryptClassCaesar()
@@ -13,9 +17,39 @@ CryptClassCaesar::~CryptClassCaesar()
 void CryptClassCaesar::encrypt()
 {
     qDebug("CryptClassCaesar::encrypt");
+    buildMap();
+
+    QByteArray tmp = getClearText();
+
+    for (int i = 0; i < tmp.size(); i++)
+    {
+        tmp[i] = substitutionsMap[tmp[i]];
+    }
+
+    setCryptText((unsigned char*) tmp.data(), tmp.size());
+
 }
 
 void CryptClassCaesar::decrypt()
 {
     qDebug("CryptClassCaesar::encrypt");
 }
+
+void CryptClassCaesar::buildMap()
+{
+    if (oldKey == getKey().toInt())
+    {
+        return;
+    }
+
+    oldKey = getKey().toInt();
+
+    substitutionsMap.clear();
+
+    for (int i = 0; i < (upperBound - lowerBound); i++)
+    {
+        substitutionsMap.insert((char)(lowerBound + i),
+                                (char)(lowerBound + (i + oldKey) % (upperBound - lowerBound)));
+
+    }
+}