downloaded challenges

didnt know they would publish everything

DownUnderCTF 2023/beginner/complementary/ape.py

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+import math
+
+ctf = b"DUCTF{"
+
+ctf = int.from_bytes(ctf)
+
+# 0x44554354467b
+# 0x3bd4fca9d0d3e400000000000000000000000
+# 6954494065942554678316751997792528753841173212407363342283423753536991947310058248515278
+
+crypt = 6954494065942554678316751997792528753841173212407363342283423753536991947310058248515278
+
+print(hex(int(math.sqrt(crypt))))
+ctf2 = 0x44554354467b0000000000000000000000000
+
+print(int(crypt / ctf2))

DownUnderCTF 2023/beginner/complementary/complementary.py

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+import math
+
+flag = open('./flag.txt', 'rb').read().strip()
+m1 = int.from_bytes(flag[:len(flag)//2])
+m2 = int.from_bytes(flag[len(flag)//2:])
+print(flag[:len(flag)//2], flag[len(flag)//2:])
+print(m1, m2)
+print(hex(m1), hex(m2))
+n = m1 * m2
+print(n)
+
+print("SOLVING!")
+sq = int(math.sqrt(n))
+print(hex(sq))

DownUnderCTF 2023/beginner/complementary/flag.txt

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+DUCTF{NOTAFLAG}

DownUnderCTF 2023/beginner/complementary/output.txt

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+6954494065942554678316751997792528753841173212407363342283423753536991947310058248515278