From ae5ccf9fa87e7f18ece311c2d0952170d8be4f40 Mon Sep 17 00:00:00 2001
From: Jonas Arnold <jonas.arnold@live.de>
Date: Fri, 24 Mar 2023 08:56:06 +0100
Subject: [PATCH] added printing of values

---
 ASYD_Cryptograhpy/SW05-SHA1/main.c | 36 +++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/ASYD_Cryptograhpy/SW05-SHA1/main.c b/ASYD_Cryptograhpy/SW05-SHA1/main.c
index 391c72c..aacd520 100644
--- a/ASYD_Cryptograhpy/SW05-SHA1/main.c
+++ b/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 ("Testnachricht 123")
+#define INPUT_MESSAGE ("abc")
 
 #pragma region SHA1-Constants
 // initial hash values
@@ -112,37 +112,47 @@ void main(void) {
     printf("\n------ Stages ------\n\n");
     #pragma region Stages calculations
     uint32_t (*f_ptr)(uint32_t, uint32_t, uint32_t) = &SHA1_f1; // use: (*f_ptr)(b,c,d);
-    uint8_t t = 1;
+    uint8_t stage = 1;
+    // print header row
+    printf("\tA\t\tB\t\tC\t\tD\t\tE\n");
 
     // stage 1...4
-    for (uint32_t i = 0; i < 80; i++) {
-        uint32_t T = leftRotate(a, 5) + ((*f_ptr)(b, c, d)) + e + k[t] + WordArray[i];
+    for (uint32_t t = 0; t < 80; t++) {
+        uint32_t T = leftRotate(a, 5) + ((*f_ptr)(b, c, d)) + e + k[stage] + WordArray[t];
         e = d;
         d = c;
         c = leftRotate(b, 30);
         b = a;
         a = T;
 
+        // print row
+        printf("t= %02d:\t%08X\t%08X\t%08X\t%08X\t%08X\t\n", t, a, b, c, d, e);
+
         // switch stages
-        if (i == 19) { f_ptr = SHA1_f2; t = 2; }
-        else if (i == 39) { f_ptr = SHA1_f3; t = 3; }
-        else if (i == 59) { f_ptr = SHA1_f4; t = 4; }
+        if (t == 19) { f_ptr = SHA1_f2; stage = 2;          printf("Switched to stage 2.\n"); }
+        else if (t == 39) { f_ptr = SHA1_f3; stage = 3;     printf("Switched to stage 3.\n"); }
+        else if (t == 59) { f_ptr = SHA1_f4; stage = 4;     printf("Switched to stage 4.\n"); }
     }
     #pragma endregion
 
     printf("\n------ Intermediate hash calculation ------\n\n");
     #pragma region intermediate hash calculation
-    h[0] = a + h[0];
-    h[1] = b + h[1];
-    h[2] = c + h[2];
-    h[3] = d + h[3];
-    h[4] = e + h[4];
+    uint32_t summand[5] = { a, b, c, d, e };
+    for (uint8_t i = 0; i < 5; i++) {
+        // calculate
+        uint32_t h_new = summand[i] + h[i];
+        // print
+        printf("H[%i] = %08X + %08X = %08X\n", i, summand[i], h[i], h_new);
+        // set value
+        h[i] = h_new;
+    }
+
     #pragma endregion
 #pragma endregion
 
     printf("\n****** Resulting hash ******\n\n");
     for (uint8_t i = 0; i < 5; i++) {
-        printf("%X", h[i]);
+        printf("%X ", h[i]);
     }
     printf("\n\n");