fixed wrong message length because of empty character after message string

ASYD_Cryptograhpy/SW05-SHA1/main.c

@@ -22,7 +22,7 @@
 #define VALUE_LENGTH 32
 #define MESSAGE_DIGEST_LENGTH 160
 #define BLOCK_LENGTH (512/8)
-#define INPUT_MESSAGE ("abc")
+#define INPUT_MESSAGE ("Testnachricht123")
 
 #pragma region SHA1-Constants
 // initial hash values
@@ -72,28 +72,32 @@ void main(void) {
 
     printf("------ Padding message ------\n\n");
     #pragma region Padding
+    // print information about message without padding
     unsigned char messageNoPadding[] = INPUT_MESSAGE;
-    printf("Size of message without padding: %i bits\n", (int)(sizeof(INPUT_MESSAGE) * 8));
+    int numBytesMessage = (sizeof(INPUT_MESSAGE) - 1);  // -1 because of '\0' at end of the string
+    printf("Size of message without padding: %i bits\n", numBytesMessage*8);
     printf("Message without padding\n");
     printBits(sizeof(messageNoPadding), &messageNoPadding);
+
     unsigned char message[BLOCK_LENGTH] = "";
     // fill in message
-    for (uint32_t i = 0; i < sizeof(INPUT_MESSAGE); i++)
+    for (uint32_t i = 0; i < numBytesMessage; i++)
     {
         message[i] = INPUT_MESSAGE[i];
     }
     // set bit
-    message[sizeof(INPUT_MESSAGE)] = 0b10000000;
+    message[numBytesMessage] = 0b10000000;
     printf("\nMessage after adding 1: \n");
     printBits(sizeof(message), &message);
-    message[BLOCK_LENGTH - 1] = sizeof(INPUT_MESSAGE) * 8;
+    // add length
+    message[BLOCK_LENGTH - 1] = numBytesMessage * 8;
     printf("\nMessage after adding length: \n");
     printBits(sizeof(message), &message);
     #pragma endregion
 
 #pragma endregion
 
-    printf("****** Hash computation ******\n\n");
+    printf("\n\n****** Hash computation ******\n\n");
 #pragma region Hash computation
 
     printf("\n------ Prepare message schedule ------\n\n");