Tags: python
Rating:
# Baby onion
## Description
> Ogres are like onions!
Attached is a `.onion` file.
## Solution
Let's use `file` on the given file. This is ASCII text, so let's read it. We see a huge hexadecimal string.
We decode it using Python:
```python
with open("baby.onion", "r") as f:
s = f.read()
decoded = bytes.fromhex(s).decode()
print(decoded)
```
Now we see a huge base64 encoded string (there are two `=` at the end which look like base64 padding).
So let's decode it:
```python
import base64
decode_b64 = base64.b64decode(decoded).decode()
print(decode_b64)
```
And now we also see a lot of hexadecimal characters. So let's automate the decryption:
```python
while True:
decoded = bytes.fromhex(decode_b64).decode()
print(decoded)
decode_b64 = base64.b64decode(decoded).decode()
print(decode_b64)
```
This finally gives us the flag.
Flag: `DawgCTF{b@by_0n10ns_c@n_$t1ll_Mak3_u_cRy!?!?}`
