Merge remote-tracking branch 'origin/main'

.gitignore

@@ -1 +1,3 @@
 __pycache__/
+nimble.develop
+nimble.paths

README

@@ -2,3 +2,27 @@ The "imbaud python library" (imp lib), or just imp for short!
 
 TODO:
 - define a getPrime function like PyCryptodome's
+- rewrite nim-lang/bigints to implement features like Karatsuba multiplication, or even Toom-3 multiplication
+
+
+PyCryptodome defines getPrime as follows:
+```py
+def getPrime(N, randfunc=None):
+    """Return a random N-bit prime number.
+
+    N must be an integer larger than 1.
+    If randfunc is omitted, then :meth:`Random.get_random_bytes` is used.
+    """
+    if randfunc is None:
+        randfunc = Random.get_random_bytes
+
+    if N < 2:
+        raise ValueError("N must be larger than 1")
+
+    while True:
+        number = getRandomNBitInteger(N, randfunc) | 1
+        if isPrime(number, randfunc=randfunc):
+            break
+    return number
+```
+in essence infinite random generation until a prime is found

celeste.nimble

@@ -0,0 +1,10 @@
+# Package
+version       = "0.1.0"
+author        = "Emile Clark-Boman"
+description   = "Self contained framework for computational mathematics"
+license       = "MIT"
+srcDir        = "src"
+
+
+# Dependencies
+requires "nim >= 2.2.0"

celeste/attacks/paddingoracle.py

@@ -1,7 +1,7 @@
 from math import inf, ceil
 from typing import Callable
 
-from imp.math.util import clamp_max
+from celeste.math.util import clamp_max
 
 SPACER = b'\xff' # arbitrary spacing character
 

celeste/crypto/cyphers.py

@@ -12,7 +12,7 @@ Terminology:
                             substitutions to the entire message (ie vigenere)
 '''
 
-from imp.constants import ALPHA_LOWER, ALPHA_UPPER
+from celeste.constants import ALPHA_LOWER, ALPHA_UPPER
 
 '''
 Constant Declarations 

celeste/math/numbers/__init__.py

@@ -6,7 +6,7 @@ Terminology:
     the "prime proper divisors of n". 
 '''
 
-from imp.extern.primefac import primefac
+from celeste.extern.primefac import primefac
 
 def factors(n: int) -> int:
     pfactors: list[tuple[int, int]] = []

celeste/math/primes.py

@@ -1,7 +1,7 @@
 from math import gcd, inf
 
-from imp.math.numbers import bigomega, factors
+from celeste.math.numbers import bigomega, factors
-from imp.extern.primefac import (
+from celeste.extern.primefac import (
     isprime,
     primegen as Primes,
 )

config.nims

@@ -0,0 +1,4 @@
+# begin Nimble config (version 2)
+when withDir(thisDir(), system.fileExists("nimble.paths")):
+  include "nimble.paths"
+# end Nimble config

ctf-solutions/bean_counter.py

@@ -8,7 +8,7 @@ from math import ceil
 
 from Crypto.Cipher import AES
 
-from imp.math.util import xor_bytes
+from celeste.math.util import xor_bytes
 
 class StepUpCounter(object):
     def __init__(self, step_up=False):

ctf-solutions/symmetry.py

@@ -5,7 +5,7 @@ Solution to https://cryptohack.org/courses/symmetric/symmetry/
 import os
 import requests
 
-from imp.math.util import xor_bytes, xor_str
+from celeste.math.util import xor_bytes, xor_str
 
 URL = 'https://aes.cryptohack.org/symmetry'
 

examples/cryptohack-ecboracle.py

@@ -1,7 +1,7 @@
 import requests
 
-from imp.constants import PRINTABLE
+from celeste.constants import PRINTABLE
-from imp.attacks import paddingoracle
+from celeste.attacks import paddingoracle
 
 from Crypto.Util.Padding import pad
 

examples/local-ecboracle.py

@@ -1,6 +1,6 @@
 import string
 
-from imp.attacks import paddingoracle
+from celeste.attacks import paddingoracle
 
 from Crypto.Cipher import AES
 from Crypto.Util.Padding import pad

pyproject.toml

@@ -1,5 +1,5 @@
 [tool.poetry]
-name = "imp"
+name = "Celeste"
 version = "0.1.0"
 description = ""
 authors = ["Emile Clark-Boman <eclarkboman@gmail.com>"]
@@ -7,7 +7,6 @@ readme = "README.md"
 
 [tool.poetry.dependencies]
 python = "^3.12"
-pycryptodome = "^3.23.0"
 requests = "^2.32.4"
 
 

research/aparith/README

@@ -0,0 +1,12 @@
+Comparing the speeds of various Nim libraries for
+arbitrary precision integers.
+
+Test Targets:
+https://github.com/status-im/nim-stint
+https://github.com/nim-lang/bigints
+https://github.com/michaeljclark/bignum
+https://github.com/FedeOmoto/bignum
+https://github.com/fsh/integers
+
+Test algorithms:
+https://en.wikipedia.org/wiki/Pollard%27s_rho_algorithm#Algorithm

research/aparith/aparith.nimble

@@ -0,0 +1,14 @@
+# Package
+
+version       = "1.0.0"
+author        = "Emile Clark-Boman"
+description   = "Arbitrary Precision Integer Test - BigInts"
+license       = "MIT"
+srcDir        = "src"
+bin           = @["aparith", "speedtest_bigint"]
+
+
+# Dependencies
+
+requires "nim >= 2.2.0"
+requires "bigints >= 1.0.0"

research/aparith/src/aparith.nim

@@ -0,0 +1,5 @@
+# This is just an example to get you started. A typical binary package
+# uses this file as the main entry point of the application.
+
+when isMainModule:
+  echo("Hello, World!")

research/aparith/src/bigints.git/private/literals.nim

@@ -0,0 +1,17 @@
+# This is an include file, do not import it directly.
+# It is needed as a workaround for Nim's parser for versions <= 1.4.
+
+proc `'bi`*(s: string): BigInt =
+  ## Create a `BigInt` from a literal, using the suffix `'bi`.
+  runnableExamples:
+    let
+      a = 123'bi
+      b = 0xFF'bi
+      c = 0b1011'bi
+    assert $a == "123"
+    assert $b == "255"
+    assert $c == "11"
+  case s[0..min(s.high, 1)]
+  of "0x", "0X": initBigInt(s[2..s.high], base = 16)
+  of "0b", "0B": initBigInt(s[2..s.high], base = 2)
+  else: initBigInt(s)

research/aparith/src/bigints.git/random.nim

@@ -0,0 +1,43 @@
+import ../bigints
+import std/sequtils
+import std/options
+import std/random
+
+func rand*(r: var Rand, x: Slice[BigInt]): BigInt =
+  ## Return a random `BigInt`, within the given range, using the given state.
+  assert(x.a <= x.b, "invalid range")
+  let
+    spread = x.b - x.a
+    # number of bits *not* including leading bit
+    nbits = spread.fastLog2
+    # number of limbs to generate completely randomly
+    nFullLimbs = max(nbits div 32 - 1, 0)
+    # highest possible value of the top two limbs.
+    hi64Max = (spread shr (nFullLimbs*32)).toInt[:uint64].get()
+  while true:
+    # these limbs can be generated completely arbitrarily
+    var limbs = newSeqWith(nFullLimbs, r.rand(uint32.low..uint32.high))
+    # generate the top two limbs more carefully. This all but guarantees
+    # that the entire number is in the correct range
+    let hi64 = r.rand(uint64.low..hi64Max)
+    limbs.add(cast[uint32](hi64))
+    limbs.add(cast[uint32](hi64 shr 32))
+    result = initBigInt(limbs)
+    if result <= spread:
+      break
+  result += x.a
+
+func rand*(r: var Rand, max: BigInt): BigInt =
+  ## Return a random non-negative `BigInt`, up to `max`, using the given state.
+  rand(r, 0.initBigInt..max)
+
+# backwards compatibility with 1.4
+when not defined(randState):
+  var state = initRand(777)
+  proc randState(): var Rand = state
+
+proc rand*(x: Slice[BigInt]): BigInt = rand(randState(), x)
+  ## Return a random `BigInt`, within the given range.
+
+proc rand*(max: BigInt): BigInt = rand(randState(), max)
+  ## Return a random `BigInt`, up to `max`.

research/aparith/src/speedtest_bigint.nim

@@ -0,0 +1,35 @@
+import bigints
+import std/[options, times]
+
+func g(x: BigInt, n: BigInt): BigInt {.inline.} =
+  result = (x*x + 1.initBigInt) mod n
+
+func pollardRho(n: BigInt): Option[BigInt] =
+  var 
+    x: BigInt = 2.initBigInt
+    y: BigInt = n
+    d: BigInt = 1.initBigInt
+
+  while d == 1.initBigInt:
+    x = g(x, n)
+    y = g(g(y, n), n)
+    d = gcd(abs(x - y), n)
+
+  if d == n:
+    return none(BigInt)
+  result = some(d)
+
+
+when isMainModule:
+  let 
+    # num = 535006138814359.initBigInt
+    # num = 12.initBigInt
+    num = 976043389537.initBigInt * 270351207761773.initBigInt
+    time = cpuTime()
+    divisor = pollardRho(num)
+    elapsed = cpuTime() - time
+  echo "Time taken: ", elapsed
+  if divisor.isSome:
+    echo "Result: ", divisor.get()
+  else:
+    echo "Result: None(BigInt)"

src/imp.nim

@@ -0,0 +1,7 @@
+# This is just an example to get you started. A typical library package
+# exports the main API in this file. Note that you cannot rename this file
+# but you can remove it if you wish.
+
+proc add*(x, y: int): int =
+  ## Adds two numbers together.
+  return x + y

src/imp/submodule.nim

@@ -0,0 +1,12 @@
+# This is just an example to get you started. Users of your library will
+# import this file by writing ``import celeste/submodule``. Feel free to rename or
+# remove this file altogether. You may create additional modules alongside
+# this file as required.
+
+type
+  Submodule* = object
+    name*: string
+
+proc initSubmodule*(): Submodule =
+  ## Initialises a new ``Submodule`` object.
+  Submodule(name: "Anonymous")