From 383732972f4c00dce231f61ac7375ae212e0d9c7 Mon Sep 17 00:00:00 2001
From: Benedict <benedict@0xb8000.de>
Date: Wed, 2 Mar 2016 19:02:27 +0100
Subject: set 1, challenge 5 completed

---
 task1_hex_to_base64.c | 35 ++++++++++++++++++++++++++++++++---
 test.sh               | 22 ++++++++++++++++++++++
 2 files changed, 54 insertions(+), 3 deletions(-)
 create mode 100644 test.sh

diff --git a/task1_hex_to_base64.c b/task1_hex_to_base64.c
index c4bf7d9..8e19f74 100644
--- a/task1_hex_to_base64.c
+++ b/task1_hex_to_base64.c
@@ -169,7 +169,20 @@ int convert_to_base64(char *encode, char *result)
 
 }
 
-void xor_string(char *str1, char* str2, char *result, int length) {
+void xor_string(char *str1, char *key, char *result)
+{
+	int i, j;
+	int length_key = strlen(key);
+
+	for(i=0, j=0;i<strlen(str1);i++,j++) {
+		if (j >= length_key)
+			j = 0;
+
+		result[i] = str1[i] ^ key[j];
+	}
+}
+
+void xor_string_equal_length(char *str1, char* str2, char *result, int length) {
 	int i;
 	
 	for(i=0;i<length;i++)
@@ -286,6 +299,18 @@ void task4() {
 
 }
 
+void task5()
+{
+	char *stanze = "Burning 'em, if you ain't quick and nimble\nI go crazy when I hear a cymbal";
+	
+	//printf("%s\n", stanze);
+	char *result = malloc(strlen(stanze));
+	char *printable = malloc(strlen(stanze)*5);
+	xor_string(stanze, "ICE", result);
+	hex_binary_to_string(result, printable, 2*strlen(stanze));
+	printf("%s\n", printable);
+}
+
 
 int main(int argc, char **argv)
 {
@@ -298,7 +323,7 @@ int main(int argc, char **argv)
 		char *back_hex = malloc(length);
 		int i = convert_hex_string_to_character_string(argv[1], tmp);
 		int j = convert_hex_string_to_character_string(argv[2], tmp2);
-		xor_string(tmp, tmp2, __xor_string, strlen(argv[2]));
+		xor_string_equal_length(tmp, tmp2, __xor_string, strlen(argv[2]));
 		// convert the __xor_string to printable charaters
 		hex_binary_to_string(tmp2, back_hex, strlen(argv[2]));
 		printf("***************************\n");
@@ -326,10 +351,14 @@ int main(int argc, char **argv)
 		//string_looks_
 
 		}
-
+/*
 	printf("***************************\n");
 	printf("set 1, challenge 4\n");
 	task4();
+*/
+	//printf("***************************\n");
+	//printf("set 1, challenge 5\n");
+	task5();
 
 
 }
diff --git a/test.sh b/test.sh
new file mode 100644
index 0000000..c2a1189
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+
+test_compare_string() {
+	if [ "$1" == "$2" ]
+	then
+		echo "test ok"
+	else
+		echo "test broken"
+	fi
+}
+
+test_set1_challenge5() {
+
+OUTPUT=$(./a.out)
+EXCEPTED="0b3637272a2b2e63622c2e69692a23693a2a3c6324202d623d63343c2a26226324272765272a282b2f20430a652e2c652a3124333a653e2b2027630c692b20283165286326302e27282f"
+
+test_compare_string "$OUTPUT" "$EXCEPTED"
+}
+
+
+test_set1_challenge5
-- 
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