From 597478ab6c20815919f14888fa770301f89a4521 Mon Sep 17 00:00:00 2001
From: RPISEC <contact@rpis.ec>
Date: Mon, 22 Jun 2015 22:38:32 -0400
Subject: [PATCH] Removes lab01 info, it's an RE level after all ;)

---
 README.md                |   4 +-
 src/lab01/CMakeLists.txt |  11 +---
 src/lab01/README.md      |  16 ------
 src/lab01/lab1A          | Bin 0 -> 9672 bytes
 src/lab01/lab1A.c        |  86 ----------------------------
 src/lab01/lab1B          | Bin 0 -> 9672 bytes
 src/lab01/lab1B.c        | 121 ---------------------------------------
 src/lab01/lab1C          | Bin 0 -> 7414 bytes
 src/lab01/lab1C.c        |  31 ----------
 9 files changed, 3 insertions(+), 266 deletions(-)
 delete mode 100644 src/lab01/README.md
 create mode 100755 src/lab01/lab1A
 delete mode 100644 src/lab01/lab1A.c
 create mode 100755 src/lab01/lab1B
 delete mode 100644 src/lab01/lab1B.c
 create mode 100755 src/lab01/lab1C
 delete mode 100644 src/lab01/lab1C.c

diff --git a/README.md b/README.md
index e8caac9..d0bd378 100644
--- a/README.md
+++ b/README.md
@@ -192,8 +192,8 @@ number of Ubuntu updates.
 
 ## Frequently Asked Questions
 
-#### Why can't I login to lab01c?
-Account names are case sensitive, so please check that you're logging in as lab01**C**
+#### Why can't I login to lab1c?
+Account names are case sensitive, so please check that you're logging in as lab1**C**
 
 #### Where are the lab solutions?
 Posting solutions spoils the fun and grind of the game, and as an academic resource it is
diff --git a/src/lab01/CMakeLists.txt b/src/lab01/CMakeLists.txt
index 30ff30f..f049a66 100644
--- a/src/lab01/CMakeLists.txt
+++ b/src/lab01/CMakeLists.txt
@@ -1,13 +1,4 @@
 cmake_minimum_required(VERSION 2.8)
 
-# Adds an executable target
-add_executable(lab1C lab1C.c)
-
-add_executable(lab1B lab1B.c)
-SET_FLAGS(lab1B "-s")
-
-add_executable(lab1A lab1A.c)
-SET_FLAGS(lab1A "-s")
-
 # These are the files we want to give students
-install(TARGETS lab1C lab1B lab1A DESTINATION "${RELEASE_DIR}/lab01")
+install(FILES lab1C lab1B lab1A DESTINATION "${RELEASE_DIR}/lab01")
diff --git a/src/lab01/README.md b/src/lab01/README.md
deleted file mode 100644
index 0fcacb4..0000000
--- a/src/lab01/README.md
+++ /dev/null
@@ -1,16 +0,0 @@
-## Reversing Labs
-I tried to base these more or less on Jeremy's labs. If you get the 
-key correct, you get a shell, so we can structure these the same way 
-we've been doing the rest of the levels.
-
-### Lab C
-Simple Integer compare, obvious yes/no path.
-
-### Lab B
-XOR'd string, you supply key by getting the difference between your input 
-and a hardcoded value. "Correct" path is obfuscated so you have to actually xor 
-stuff together and reason it out (or thats the idea)
-
-### Lab A
-Simple keygen. The serial is calculated by adding to a base checksum and doing 
-some XOR / modulus stuff. 
diff --git a/src/lab01/lab1A b/src/lab01/lab1A
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diff --git a/src/lab01/lab1A.c b/src/lab01/lab1A.c
deleted file mode 100644
index 536cb28..0000000
--- a/src/lab01/lab1A.c
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
-Modern Binary Exploitation
-Lab 1: Introduction to Reverse Engineering
-LabA: Keygen
-
-gcc -s -m32 ./labA.c
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/ptrace.h>
-#include <unistd.h>
-
-#include "utils.h"
-#define ANSI_COLOR_RED     "\x1b[31m"
-#define ANSI_COLOR_GREEN   "\x1b[32m"
-#define ANSI_COLOR_YELLOW  "\x1b[33m"
-
-ENABLE_TIMEOUT(60)
-
-int auth(char * username, unsigned int serial) {
-    int i, len;
-    unsigned int chk;
-
-    username[strcspn(username, "\n")] = 0;
-    len = strnlen(username, 32);
-
-    deathrays;
-    if (len < 6) {
-        return 1;
-    }
-
-    if (ptrace(PTRACE_TRACEME, 0, 1, 0) == -1)
-    {
-        printf(ANSI_COLOR_GREEN ".---------------------------.\n");
-        printf(ANSI_COLOR_RED   "| !! TAMPERING DETECTED !!  |\n");
-        printf(ANSI_COLOR_GREEN "'---------------------------'\n");
-
-        return 1;
-    }
-
-    chk = (username[3] ^ 0x1337) + 0x5EEDED;
-    for(i=0; i<len; i++) {
-        if (username[i] < 32 || username[i] > 127) {
-            return 1;
-        }
-        chk += (username[i] ^ chk) % 1337;
-    }
-
-    if (serial != chk) {
-        return 1;
-    }
-
-    return 0;
-}
-
-int main(int argc, char ** argv) {
-    unsigned int serial;
-    char username[32];
-
-    deathrays;
-    printf(".---------------------------.\n");
-    printf("|---------  RPISEC  --------|\n");
-    printf("|+ SECURE LOGIN SYS v. 3.0 +|\n");
-    printf("|---------------------------|\n");
-
-    printf("|~- Enter your Username:  ~-|\n");
-    printf("'---------------------------'\n");
-    fgets(username, 32, stdin);
-
-    printf(".---------------------------.\n");
-    printf("| !! NEW ACCOUNT DETECTED !!|\n");
-    printf("|---------------------------|\n");
-    printf("|~- Input your serial:    ~-|\n");
-    printf("'---------------------------'\n");
-    scanf("%u", &serial);
-
-    if(!auth(username, serial)) {
-        printf("Authenticated!\n");
-        system("/bin/sh");
-        return EXIT_SUCCESS;
-    }
-
-    return EXIT_FAILURE;
-}
diff --git a/src/lab01/lab1B b/src/lab01/lab1B
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HcmV?d00001

diff --git a/src/lab01/lab1B.c b/src/lab01/lab1B.c
deleted file mode 100644
index 3232848..0000000
--- a/src/lab01/lab1B.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
-Modern Binary Exploitation
-Lab 1: Introduction to Reverse Engineering
-LabB: Harder CrackMe
-
-gcc -s -m32 ./labB.c
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-
-#include "utils.h"
-
-void decrypt(unsigned int key) {
-    unsigned int len;
-    unsigned int i;
-    char str[] = "Q}|u`sfg~sf{}|a3";
-
-    deathrays;
-    len = strlen(str);
-
-    for (i=0; i<len; i++)
-        str[i] ^= key;
-
-    if (!strcmp(str, "Congratulations!"))
-        system("/bin/sh");
-    else
-        printf("\nInvalid Password!\n");
-
-}
-
-void test(unsigned int input, unsigned int secret) {
-    int res;
-    res = secret - input;
-    switch(res)
-    {
-        case 0x1:
-            decrypt(res);
-            break;
-        case 0x2:
-            decrypt(res);
-            break;
-        case 0x3:
-            decrypt(res);
-            break;
-        case 0x4:
-            decrypt(res);
-            break;
-        case 0x5:
-            decrypt(res);
-            break;
-        case 0x6:
-            decrypt(res);
-            break;
-        case 0x7:
-            decrypt(res);
-            break;
-        case 0x8:
-            decrypt(res);
-            break;
-        case 0x9:
-            decrypt(res);
-            break;
-        case 0xA:
-            decrypt(res);
-            break;
-        case 0xB:
-            decrypt(res);
-            break;
-        case 0xC:
-            decrypt(res);
-            break;
-        case 0xD:
-            decrypt(res);
-            break;
-        case 0xE:
-            decrypt(res);
-            break;
-        case 0xF:
-            decrypt(res);
-            break;
-        case 0x10:
-            decrypt(res);
-            break;
-        case 0x11:
-            decrypt(res);
-            break;
-        case 0x12:
-            decrypt(res);
-            break;
-        case 0x13:
-            decrypt(res);
-            break;
-        case 0x14:
-            decrypt(res);
-            break;
-        case 0x15:
-            decrypt(res);
-            break;
-        default:
-            decrypt(rand());
-    }
-}
-
-int main(int argc, char ** argv) {
-    int input;
-
-    deathrays;
-    srand(time(NULL));
-    printf(".---------------------------.\n");
-    printf("|-- RPISEC - CrackMe v2.0 --|\n");
-    printf("'---------------------------'\n");
-    printf("\nPassword: ");
-    scanf("%d", &input);
-
-    test(input, 0x1337d00d);
-
-    return EXIT_SUCCESS;
-}
diff --git a/src/lab01/lab1C b/src/lab01/lab1C
new file mode 100755
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/src/lab01/lab1C.c b/src/lab01/lab1C.c
deleted file mode 100644
index 345bdc6..0000000
--- a/src/lab01/lab1C.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
-Modern Binary Exploitation
-Lab 1: Introduction to Reverse Engineering
-LabC: Simple CrackMe
-
-gcc -m32 ./labC.c
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-
-int main(int argc, char ** argv) {
-    int input;
-
-    printf("-----------------------------\n");
-    printf("--- RPISEC - CrackMe v1.0 ---\n");
-    printf("-----------------------------\n");
-    printf("\nPassword: ");
-    scanf("%d", &input);
-
-    if (input == 0x149A) {
-        printf("\nAuthenticated!\n");
-        system("/bin/sh");
-    }
-    else {
-        printf("\nInvalid Password!!!\n");
-        return EXIT_FAILURE;
-    }
-
-    return EXIT_SUCCESS;
-}