<script> var r = {code: 'hacker1000'} if(r.code == 'bugku10000'){ console.log('e'); document.getElementById('d').innerHTML = "Wrong account or password!"; }else{ console.log('0'); window.location.href = 'success.php?code='+r.code; } </script>
时间: 2024-04-11 18:30:00 浏览: 89
这是一个JavaScript代码块。它包含了一个名为`r`的变量,该变量是一个对象,具有一个名为`code`的属性,属性的值是字符串`hacker1000`。
接下来,代码使用条件语句`if`来检查`r.code`是否等于字符串`bugku10000`。如果条件成立,将输出`e`到控制台,并将错误提示信息显示在id为'd'的HTML元素中。
如果条件不成立,则输出`0`到控制台,并将浏览器重定向到一个名为`success.php`的页面,同时传递参数`code=r.code`给该页面。
请注意,这段代码可能是一个登录验证的逻辑代码,但出于安全考虑,如果你在实际项目中使用,请确保对用户输入进行正确的验证和过滤,以防止安全漏洞。
相关问题
修改代码from Crypto.Util.number import * from Crypto.PublicKey import RSA from hashlib import sha256 import random, os, signal, string def proof_of_work(): random.seed(os.urandom(8)) proof = ''.join([random.choice(string.ascii_letters+string.digits) for _ in range(20)]) _hexdigest = sha256(proof.encode()).hexdigest() print(f"sha256(XXXX+{proof[4:]}) == {_hexdigest}") print('Give me XXXX: ') x = input() if len(x) != 4 or sha256(x.encode()+proof[4:].encode()).hexdigest() != _hexdigest: print('Wrong PoW') return False return True if not proof_of_work(): exit(1) signal.alarm(10) print("Give me a bad RSA keypair.") try: p = int(input('p = ')) q = int(input('q = ')) assert p > 0 assert q > 0 assert p != q assert p.bit_length() == 512 assert q.bit_length() == 512 assert isPrime(p) assert isPrime(q) n = p * q e = 65537 assert p % e != 1 assert q % e != 1 d = inverse(e, (p-1)*(q-1)) except: print("Invalid params") exit(2) try: key = RSA.construct([n,e,d,p,q]) print("This is not a bad RSA keypair.") exit(3) except KeyboardInterrupt: print("Hacker detected.") exit(4) except ValueError: print("How could this happen?") from secret import flag print(flag)
为了修复这个程序的漏洞,可以加入一个时间限制,如果用户输入的参数过大导致程序运行时间过长,程序会自动退出。代码如下所示:
```python
from Crypto.Util.number import *
from Crypto.PublicKey import RSA
from hashlib import sha256
import random, os, signal, string
def proof_of_work():
random.seed(os.urandom(8))
proof = ''.join([random.choice(string.ascii_letters+string.digits) for _ in range(20)])
_hexdigest = sha256(proof.encode()).hexdigest()
print(f"sha256(XXXX+{proof[4:]}) == {_hexdigest}")
print('Give me XXXX: ')
x = input()
if len(x) != 4 or sha256(x.encode()+proof[4:].encode()).hexdigest() != _hexdigest:
print('Wrong PoW')
return False
return True
if not proof_of_work():
exit(1)
signal.alarm(10)
print("Give me a bad RSA keypair.")
try:
p = int(input('p = '))
q = int(input('q = '))
assert p > 0
assert q > 0
assert p != q
assert p.bit_length() == 512
assert q.bit_length() == 512
assert isPrime(p)
assert isPrime(q)
n = p * q
e = 65537
assert p % e != 1
assert q % e != 1
d = inverse(e, (p-1)*(q-1))
key = RSA.construct([n,e,d,p,q])
print("This is not a bad RSA keypair.")
exit(3)
except AssertionError:
print("Invalid params")
exit(2)
except KeyboardInterrupt:
print("Time limit exceeded")
exit(4)
except ValueError:
print("How could this happen?")
from secret import flag
print(flag)
```
在新代码中,我们使用了 signal 库中的 alarm 函数,将程序的运行时间限制在 10 秒钟内。当用户输入的参数过大导致程序运行时间超过 10 秒时,程序会自动退出,并输出 "Time limit exceeded"。
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