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Sammy Pfeiffer 2015-03-14 01:21:27 +01:00
parent 676978728d
commit 3f7b1f695c
1 changed files with 7 additions and 0 deletions
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ige.py
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@ -143,3 +143,10 @@ if __name__ == "__main__":
else: else:
print("answer_str is not in decrypt_ans_hex_str :(") print("answer_str is not in decrypt_ans_hex_str :(")
print("This is because the header (SHA1(answer)) is included and is 20 bytes long.")
print("And in the end there are 0 to 15 bytes random to fill up the gap.")
print("This means that we can safely ignore the starting 20bytes and all the extra bytes in the end")
# answer_with_hash := SHA1(answer) + answer + (0-15 random bytes); such that the length be divisible by 16;
# This... divisible by 16 is because of the blocksize of AES-256-ECB (yay!)