Diff: Enigma.cpp

Revision:

3:9590c44c9ecd

Parent:

2:ee55abc2b6a2

Child:

4:107a360171fe

diff -r ee55abc2b6a2 -r 9590c44c9ecd Enigma.cpp
--- a/Enigma.cpp	Tue Sep 24 08:52:11 2019 +0000
+++ b/Enigma.cpp	Tue Sep 24 09:17:40 2019 +0000
@@ -155,6 +155,7 @@
     // Initialize reflector.
     _reflector = const_cast<uint8_t*>(REFLECTOR);
 
+    // Connect the plugboard
     _plugboard = new uint8_t[cords][2];
     for (size_t i = 0; i < cords; i++) {
         for (size_t j = 0; j < 2; j++) {
@@ -169,6 +170,7 @@
  * @retval  out Pointer to a byte array to store the encrypted bytes in.
  * @param   in  Pointer to a byte array to be encrypted.
  * @param   len Length of the byte array.
+ * @retval  Pointer to a byte array containing the encrypted bytes.
  */
 uint8_t* Enigma::encrypt(uint8_t* out, const uint8_t* in, size_t len)
 {
@@ -182,7 +184,7 @@
     for (size_t i = 0; i < len; i++) {
         uint8_t byte = in[i];
 
-        // Swap bytes connected with cords
+        // Swap bytes cross-connected with cords
         found = false;
         for (size_t j = 0; j < _cords; j++) {
             for (size_t k = 0; k < 2; k++) {
@@ -224,7 +226,7 @@
         byte = _entryWheel[_mod(_find(byte, _middleRotor) - middleRotorPos + rightRotorPos)];
         byte = _entryWheel[_mod(_find(byte, _rightRotor) - rightRotorPos)];
 
-        // Swap bytes connected with cords
+        // Swap bytes cross-connected with cords
         found = false;
         for (size_t j = 0; j < _cords; j++) {
             for (size_t k = 0; k < 2; k++) {
@@ -247,10 +249,11 @@
 
 /**
  * @brief   Decrypts a byte array.
- * @note    Decryption capability is extended from 26 chars to all 256 bytes.
+ * @note    Decryption capability is extended from 26 upper case letters to any byte.
  * @retval  out Pointer to a byte array to store the decrypted bytes in.
  * @param   in  Pointer to a byte array to be decrypted.
  * @param   len Length of the byte array.
+ * @retval  Pointer to a byte array containing the decrypted bytes.
  */
 uint8_t* Enigma::decrypt(uint8_t* out, const uint8_t* in, size_t len)
 {
@@ -328,7 +331,10 @@
     memset(modified, 0, _len);
 
     for (size_t i = 0; i < _len; i++) {
+
         if (modified[i] != 0) {
+
+
             continue;
         }
 
@@ -397,4 +403,4 @@
     }
 
     return -1;
-}
+}
\ No newline at end of file