From 14e3b0e4f801f6fdbd6be941a2022e4e665d88eb Mon Sep 17 00:00:00 2001
From: Benedict <benedict@0xb8000.de>
Date: Fri, 4 Mar 2016 12:45:40 +0100
Subject: fxied api change in other tasks

---
 Makefile |  4 ++--
 task4.c  |  2 +-
 task5.c  |  2 +-
 task6.c  | 46 ++++++++++++++++++++++++++++++++++++++--------
 4 files changed, 42 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index 69b8615..cb8173b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 LIB=lib.c
 CC=gcc
 
-all: task1 task4 task5 task6
+all: task1 task2 task4 task5 task6
 
 task1:
 	$(CC) task1.c $(LIB) -o task1
@@ -19,4 +19,4 @@ task6:
 	$(CC) task6.c $(LIB) -o task6
 
 clean:
-	rm task4 task5 task6
+	rm task1 task2 task4 task5 task6
diff --git a/task4.c b/task4.c
index fe812ab..a1b7b28 100644
--- a/task4.c
+++ b/task4.c
@@ -29,7 +29,7 @@ void main() {
 			printf("line %i:\n", line_number);
 			for(j=0;j<length;j++) {
 				single_key = keys[j];
-				xor_string(string2, &single_key, cleartext);
+				xor_string(string2, &single_key, cleartext, 1, 60);
 				printf("%s\n", cleartext);
 			}
 		}
diff --git a/task5.c b/task5.c
index c2c72d0..f110e30 100644
--- a/task5.c
+++ b/task5.c
@@ -9,7 +9,7 @@ void main()
 	
 	char *result = malloc(strlen(stanze));
 	char *printable = malloc(strlen(stanze)*5);
-	xor_string(stanze, "ICE", result);
+	xor_string(stanze, "ICE", result, 3, strlen(stanze));
 	hex_binary_to_string(result, printable, 2*strlen(stanze));
 	printf("%s\n", printable);
 }
diff --git a/task6.c b/task6.c
index d807b69..aff1d39 100644
--- a/task6.c
+++ b/task6.c
@@ -2,20 +2,50 @@
 
 void main()
 {
-	FILE *fp;
+	/*FILE *fp;
 	int keysize;
+	char *file_content, *chipertext, *block1, *block2;
+	int file_size = 61;
+	int min_hamming_distance;
 
+	fp = fopen("6.txt", "r");
 
-	// data come on stdin (base64 decoded already)
+	if (fp == NULL) {
+		printf("Error open file\n");
+		exit(1);
+	}
+	
+	file_content = malloc(file_size);
+
+	// read data and decode it from base64
+	// result is not a hex strin or?
+
+	while (fscanf(fp, "%60c", file_content) != EOF) {
+		file_size += 61;
+		file_content = realloc(file_content, file_size);
+	}
+
+	ciphertext = malloc(file_size);
+	decode_base64(file_content, ciphertext);
 
+	block1 = malloc(41);
+	block2 = malloc(41);
+
+	// split ciphertext in blocks of size 2 to 40
 	for(keysize=2; keysize < 40; keysize++) {
-		char *string1 = malloc(keysize+1);
-		char *string2 = malloc(keysize+1);
-		
-		//while(fscanf(fp, "%n"
+		strncpy(block1, ciphertext, keysize);
+		strncpy(block2, &ciphertext[keysize+1], keysize);
 
-		free(string1);
-		free(string2);
+		tmp = hamming_distance(block1, block2);
+		tmp = tmp / keysize;
 
+		if (tmp < min_hamming_distance)
+			min_hamming_distance = tmp;
 	}
+
+	printf("keysize: %i\n", min_hamming_distance);
+
+
+	// transpose the blocks
+*/	
 }
-- 
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