Initial data commit

Task/Parallel-brute-force/Nim/parallel-brute-force.nim

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+import strutils, threadpool
+import nimcrypto
+
+const
+
+  # List of hexadecimal representation of target hashes.
+  HexHashes = ["1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad",
+               "3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b",
+               "74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f"]
+
+  # List of target hashes.
+  Hashes = [MDigest[256].fromHex(HexHashes[0]),
+            MDigest[256].fromHex(HexHashes[1]),
+            MDigest[256].fromHex(HexHashes[2])]
+
+  Letters = 'a'..'z'
+
+
+proc findHashes(a: char) =
+  ## Build the arrays of five characters starting with the value
+  ## of "a" and check if their hash matches one of the targets.
+  ## Print the string and the hash value if a match is found.
+  for b in Letters:
+    for c in Letters:
+      for d in Letters:
+        for e in Letters:
+          let s = [a, b, c, d, e]
+          let h = sha256.digest(s)
+          for i, target in Hashes:
+            if h == target:   # Match.
+              echo s.join(), " → ", HexHashes[i]
+
+
+# Launch a thread for each starting character.
+for a in Letters:
+  spawn findHashes(a)
+
+sync()