58 lines
2.5 KiB
Markdown
58 lines
2.5 KiB
Markdown
# Tasks for beginners
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This document contains some tasks for Python beginners. It does not aim to teach general
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programming techniques, only how to use Python.
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## MD5 Hashchecker
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- [ ] Hash `foobar19` with the md5 hashing algorithm
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- Hints:
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- Use Pythons `hashlib`.
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- Your hashing function does not take strings for input, only raw data (bytes).
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- You need to explicitly tell your hash to actually process the input.
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- When printing your results, the result may be interpreted as data for characters.
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You want the numeric value of the result in Hexadecimal.
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<details>
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<summary>Solution</summary>
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MD5 of `foobar19` is `fa5c65d5438f849387d3fdda2be4dd65`
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</details>
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- [ ] 1. rotate the base string `foobar` with numbers from 0 to 999999 like this:
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1. `foobar000000`
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2. `foobar000001`
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3. `foobar000002`
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...
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999999. `foobar999999`
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2. Get the MD5 hash value for each of those
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3. How many of these start with `00`?
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- Hints:
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- Use a for loop to do the thing X times
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- Use Pythons string formatting to put the numbers and string together
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- Use Options for the `%d` Placeholder to get 0 to be displayed as `000000`
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- do the same hashing as in the previous task
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- After hashing, check if your current hash matches the search.
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Print it if that is the case to see if the match is a false positive.
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- Increment a number on each match. The value of that number after the loop is how many
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Hashes start with `00` for this task.
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- Testvectors, the last 5 matches:
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```text
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999384 | 009671fd23fa783df1fff63516e5d115
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999751 | 00ec2ade58f75c44b7300294497f7fb1
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999844 | 009cfd7949b577a3311d9db3ee49c15d
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999852 | 006fe04f7d3f710f93d3e6324506154a
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999902 | 00c063364ddffa1bdf338dfcf0319424
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```
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<details>
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<summary>Solution</summary>
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3889 matches for the search parameters.
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</details>
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- [ ] Continuing from the previous task, what is the earliest value for `foobarXXXXXX` (where `X`
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is a substitute for the iterating numbers) where the hash starts with `0000`?
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- Hints:
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- Stop on the earliest match.
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<details>
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<summary>Solution</summary>
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021820 | 00001c9393b83c8da0db478687211d1d
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</details>
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## Super basic webserver
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- [ ] Make a webserver print "Schlangenjazz" when you connect to it
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