added official hacktheboo2024 writeups

htb/hacktheboo2024/crypto/[Very Easy] brevi moduli/challenge/flag.txt

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+HTB{this_was_a_warmup_to_get_you_used_to_integer_factoring_and_parsing_pem_formatted_keys}

htb/hacktheboo2024/crypto/[Very Easy] brevi moduli/challenge/server.py

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+from Crypto.Util.number import isPrime, getPrime, bytes_to_long
+from Crypto.PublicKey import RSA
+
+rounds = 5
+e = 65537
+
+for i in range(rounds):
+    print('*'*10, f'Round {i+1}/{rounds}', '*'*10)
+
+    pumpkin1 = getPrime(110)
+    pumpkin2 = getPrime(110)
+    n = pumpkin1 * pumpkin2
+    large_pumpkin = RSA.construct((n, e)).exportKey()
+    print(f'\n🎃Can you crack this pumpkin🎃?\n{large_pumpkin.decode()}\n')
+
+    assert isPrime(_pmp1 := int(input('enter your first pumpkin = '))), exit()
+    assert isPrime(_pmp2 := int(input('enter your second pumpkin = '))), exit()
+
+    if n != _pmp1 * _pmp2:
+        print('wrong! bye...')
+        exit()
+
+    print()
+
+print(open('flag.txt').read())