2021DASCTF实战精英夏令营暨DASCTF July X CBCTF 4th misc部分wp

from pwn import *

# sh=process("./buu--rip")  local端
sh = remote('node4.buuoj.cn', 28699)
s = []
i=1
tag=0
q = sh.recvuntil(':')
while True:
    if i==66:
        break;
    if tag==0:
        sh.send('r')
        q=sh.recvuntil(':')
        print(q)
        if b'again'  not in q:
            i+=1;s.append('r')
            continue
        else :
             sh.send('y')
             for m in s:
                 sh.recvuntil(':')
                 sh.send(m)
             sh.recvuntil(':')  #
             tag = 1
             continue

    elif tag==1:
        sh.send('b')
        q=sh.recvuntil(':')
        print(q)
        if b'again' not in q:
            i += 1;s.append('b')
            continue
        else:
              sh.send('y')
              for m in s:
                  sh.recvuntil(':')
                  sh.send(m)
              sh.recvuntil(':')#
              tag = 0
              continue

print(i)
sh.interactive()

from pwn import *

dirs=[(0,1),(1,0),(0,-1),(-1,0)] #当前位置四个方向的偏移量
path=[]              #存找到的路径
 
def mark(maze,pos):  #给迷宫maze的位置pos标"2"表示“到过了”
    maze[pos[0]][pos[1]]=2
 
def passable(maze,pos): #检查迷宫maze的位置pos是否可通行
    return maze[pos[0]][pos[1]]==0
 
def find_path(maze,pos,end):
    mark(maze,pos)
    if pos==end:
        print(pos,end=" ")  #已到达出口，输出这个位置。成功结束
        path.append(pos)
        return True
    for i in range(4):      #否则按四个方向顺序检查
        nextp=pos[0]+dirs[i][0],pos[1]+dirs[i][1]
        #考虑下一个可能方向
        if passable(maze,nextp):        #不可行的相邻位置不管
            if find_path(maze,nextp,end):#如果从nextp可达出口，输出这个位置，成功结束
                print(pos,end=" ")
                path.append(pos)
                return True
    return False
 
def see_path(maze,path,leng):     #使寻找到的路径可视化
    length = 0
    for i,p in enumerate(path):
        if i==0:
            maze[p[0]][p[1]] ="E"
        elif i==len(path)-1:
            maze[p[0]][p[1]]="S"
        else:
            maze[p[0]][p[1]] =3
    print("\n")
    for r in maze:
        for c in r:
            if c==3:
                print('\033[0;31m'+"*"+" "+'\033[0m',end="")
                length+=1
            elif c=="S" or c=="E":
                print('\033[0;34m'+c+" " + '\033[0m', end="")
            elif c==2:
                print('\033[0;32m'+"#"+" "+'\033[0m',end="")
            elif c==1:
                print('\033[0;;40m'+" "*2+'\033[0m',end="")
            else:
                print(" "*2,end="")
        print()
    print(length+1)
    leng=length+1
    return leng
 
def maze_change(num):
    MAZE=[]
    row=col=0
    M=str(sh.recvuntil("P"))
    print(M)
    MAZE.append([])
    for m in M:
        if col == num:
            MAZE.append([])
            row+=1
            col=0
        if m == '\n':
            continue
        elif m == '#':
            MAZE[row].append(1)
            col+=1
        elif m == ' ':
            MAZE[row].append(0)
            col+=1
        elif m == 'S':
            MAZE[row].append(0)
            start=(row,col)
            col+=1
        elif m =='E':
            MAZE[row].append(0)
            end=(row,col)
            col+=1
        elif m =='P':
            break
    print(MAZE)
    return MAZE, start, end
def gets(num):
    maze=[]
    start=(0,0)
    end=(0,0)
    maze,start,end=maze_change(num)
    find_path(maze,start,end)
    leng=0
    leng=see_path(maze,path,leng)
    sh.sendline(str(leng+1))

sh=remote("node4.buuoj.cn",27512)
print(sh.recvuntil(b'game'))
sh.sendline("1")
gets(11)
print(sh.recvuntil(b'level!'))
dirs=[(0,1),(1,0),(0,-1),(-1,0)] #当前位置四个方向的偏移量
path=[]              #存找到的路径

gets(21)
print(sh.recvuntil(b'level!'))
dirs=[(0,1),(1,0),(0,-1),(-1,0)] #当前位置四个方向的偏移量
path=[]              #存找到的路径

gets(31)
print(sh.recvuntil(b'level!'))
dirs=[(0,1),(1,0),(0,-1),(-1,0)] #当前位置四个方向的偏移量
path=[]              #存找到的路径

gets(101)
sh.interactive()

from PIL import Image

path = "Just_a_GIF/"  #填自己的路径
for i in range(11):
    picn = Image.new("RGB",(119,83),(255,255,255))
    for j in range(1,41):
        p1=Image.open(path+str(i)+'.png')
        p2=Image.open(path+str(i+j*11)+'.png')
        for w in range(119):
            for h in range(83):
                if p1.getpixel((w,h)) != p2.getpixel((w,h)):
                    picn.putpixel((w,h),(0,0,0))
    picn.save(str(i)+'.png')

from PIL import Image
img = Image.open("Nuclear wastewater.png")
for i in range(3):
    for j in range(0,230,10):
        for t in range(0,230,10):
            rgb=list(img.getpixel((t,j)))
            if rgb[i]>32 and rgb[i]<128:
                print(chr(rgb[i]),end='')

from collections import Counter
f = 'Ys>UEJht#?ppeEFtstR#~:hi~tR:@s@YRteK#e@KsR&E&:eR:Eht/#iKtteYKhYKYhhhihhKtC2tt:HVEesY&#@Rj!seRi:eitEtKsetKtEE:hh#h#eYKYihhYK(Kt@iSY$KY/@pRsEetsip:~h@eeEs!E&&::EsEEei#/iYe#/ieKKt//iKYhh'
print(Counter(f))