Crypto Challenges started

Author: AOrps

.gitignore

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 misc/painbin/challenge/creds.py
 __pycache__
 .vscode
-*.db
+*.db
+.sour

crypto/README.md

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 ## Easy Challenges
 | Challenge Name  | Description | Hint
 |:-- | :-- | :---
-| | | 
-
+| [rome](rome)| Simple Caesar Cipher with the flag | Run the text thry a caesar cipher 
+| [rome-but-harder](rome-but-harder) | Base64 wuth flag and caesar cipher and reversed | Cyberchef and cryptii
+| [rail-fence](rail-fence) | The flag is there but not. There must be some type of pattern. This flag needs to be submitted in upper case. | Something about a fence cipher
 
 ## Medium Challenges
 | Challenge Name  | Description | Hint
 |:-- | :-- | :---
-| | | 
+| [XORED-Message](XORED-Message) |  | 
 
 
 ## Hard Challenges

crypto/XORED-Message/README.md

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+# XORED-Message

crypto/rail-fence/README.md

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+# rail-fence
+
+`j4cgpcr1n31Z1ht{l30Z4C3}ffrgr`
+
+## Solution
+* Run the text thru a railfence cipher 
+
+## Resources
+* https://github.com/CrypTools/RailfenceCipher 

crypto/rail-fence/challenge/flag.txt

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+j4cgpcr1n31Z1ht{l30Z4C3}ffrgr

crypto/rail-fence/challenge/rail-fence.py

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+# Code modified from https://github.com/CrypTools/RailfenceCipher
+def encode(text, key):
+    fence = ["" for i in range(key)]
+    rail  = 0
+    var   = 1
+
+    for char in text:
+        fence[rail] += char
+        rail += var
+
+        if rail == key-1 or rail == 0:
+            var = -var
+    
+    return "".join(fence)
+
+
+
+# https://github.com/CrypTools/RailfenceCipher/blob/master/py/decrypt.py
+def decrypt(s,n):
+    fence = [[] for i in range(n)]
+    rail  = 0
+    var   = 1
+
+    for char in s:
+        fence[rail].append(char)
+        rail += var
+
+        if rail == n-1 or rail == 0:
+            var = -var
+
+    rFence = [[] for i in range(n)]
+
+    i = 0
+    l = len(s)
+    s = list(s)
+    for r in fence:
+        for j in range(len(r)):
+            rFence[i].append(s[0])
+            s.remove(s[0])
+        i += 1
+
+    rail = 0
+    var  = 1
+    r = ''
+    for i in range(l):
+        r += rFence[rail][0]
+        rFence[rail].remove(rFence[rail][0])
+        rail += var
+
+        if rail == n-1 or rail == 0:
+            var = -var
+
+    return r
+
+
+
+
+# Ensure that the text being encoded does not have a space character
+if __name__ == "__main__":
+
+    msg = "jctf{r41lf3nc30rZ1gZ4gC1ph3r}"
+    key = 4
+
+    flag = encode(f"{msg}", key)
+    solved = decrypt(flag, key)
+    print(f"flag = {flag}")
+    print(f"msg  = {msg}")
+    print(f"flag = {solved} (but solved)")
+
+

crypto/rome-but-harder/README.md

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+# rome-but-harder

crypto/rome/README.md

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+# rome