From 95aecb983d12f981d34b045605c172bfcc84aa92 Mon Sep 17 00:00:00 2001
From: Silmaulviel <silmaulviel@noreply.localhost>
Date: Sat, 17 Jun 2023 12:38:15 +0000
Subject: [PATCH] =?UTF-8?q?Upload=20files=20to=20'tasks/=D0=92=D0=BE=D0=B7?=
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MIME-Version: 1.0
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---
 .../Исходники/decrypt                         | Bin 0 -> 8640 bytes
 .../Исходники/decrypt_file.cpp                |  32 ++++++++++++++++++
 .../Исходники/encrypt_file.cpp                |  32 ++++++++++++++++++
 .../Исходники/flag.txt                        |   2 ++
 4 files changed, 66 insertions(+)
 create mode 100644 tasks/Возвращение зашифрованного файла/Исходники/decrypt
 create mode 100644 tasks/Возвращение зашифрованного файла/Исходники/decrypt_file.cpp
 create mode 100644 tasks/Возвращение зашифрованного файла/Исходники/encrypt_file.cpp
 create mode 100644 tasks/Возвращение зашифрованного файла/Исходники/flag.txt

diff --git a/tasks/Возвращение зашифрованного файла/Исходники/decrypt b/tasks/Возвращение зашифрованного файла/Исходники/decrypt
new file mode 100644
index 0000000000000000000000000000000000000000..a1755aab5a28a7645703f2f23c2295df3978c625
GIT binary patch
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diff --git a/tasks/Возвращение зашифрованного файла/Исходники/decrypt_file.cpp b/tasks/Возвращение зашифрованного файла/Исходники/decrypt_file.cpp
new file mode 100644
index 0000000..34653c4
--- /dev/null
+++ b/tasks/Возвращение зашифрованного файла/Исходники/decrypt_file.cpp	
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+const int maxsize = 33;
+char line[maxsize+1];
+char ans[maxsize+1];
+FILE * file;
+
+void copying() {
+    for (int i = 0; i < maxsize; ++i) {
+        ans[i] = line[i];
+    }
+}
+
+void decryption() {
+    for (int i = 0; i < maxsize; i+=1, ans[i] = (ans[i] ^ '^'-'|'+'&') - i) {
+    }
+}
+
+int main(int argc, char * argv[]) {
+    file = fopen("flag.enc", "r");
+    if (file == NULL)
+        printf("File does not exist!\n");
+    else {
+        fgets(line, maxsize+1, file);
+        copying();
+        decryption();
+        printf("%s\n", ans);
+        fclose(file);
+    }   
+    return 0;
+}
diff --git a/tasks/Возвращение зашифрованного файла/Исходники/encrypt_file.cpp b/tasks/Возвращение зашифрованного файла/Исходники/encrypt_file.cpp
new file mode 100644
index 0000000..c80b07f
--- /dev/null
+++ b/tasks/Возвращение зашифрованного файла/Исходники/encrypt_file.cpp	
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+const int maxsize = 33;
+char line[maxsize+1];
+char ans[maxsize+1];
+FILE * file;
+
+void copying() {
+    for (int i = 0; i < maxsize; ++i) {
+        ans[i] = line[i];
+    }
+}
+
+void encryption() {
+    for (int i = 0; i < maxsize; i+=1, ans[i] = (ans[i] + i) ^ '^'-'|'+'&') {
+    }
+}
+
+int main(int argc, char * argv[]) {
+    file = fopen("flag.txt", "r");
+    if (file == NULL)
+        printf("File does not exist!\n");
+    else {
+        fgets(line, maxsize+1, file);
+        copying();
+        encryption();
+        printf("%s\n", ans);
+        fclose(file);
+    }   
+    return 0;
+}
diff --git a/tasks/Возвращение зашифрованного файла/Исходники/flag.txt b/tasks/Возвращение зашифрованного файла/Исходники/flag.txt
new file mode 100644
index 0000000..0b6ea6d
--- /dev/null
+++ b/tasks/Возвращение зашифрованного файла/Исходники/flag.txt	
@@ -0,0 +1,2 @@
+ctf{0h_c0ngr4tz_y0u_g0t_th1s!}
+