Browse Source

add sha1 function

pull/1/head
David Ashby 4 years ago
parent
commit
1657b39fb7
2 changed files with 106 additions and 7 deletions
  1. +80
    -1
      shamwow.rb
  2. +26
    -6
      shamwow_test.rb

+ 80
- 1
shamwow.rb View File

@ -6,7 +6,11 @@ end
# treat all numbers as if they are 32-bit integers
def ror(num, shift)
((num >> shift) | (num << (32-shift)) & ((2 ** 32) - 1))
(((num >> shift) | (num << (32-shift))) & ((2 ** 32) - 1))
end
def lor(num, shift)
(((num << shift) | (num >> (32-shift))) & ((2 ** 32) - 1))
end
def sha2(message)
@ -98,3 +102,78 @@ def sha2(message)
("%08x" % h0).concat("%08x" % h1).concat("%08x" % h2).concat("%08x" % h3).concat("%08x" % h4).concat("%08x" % h5).concat("%08x" % h6).concat("%08x" % h7)
end
def sha1(message)
message_in_bits = message.unpack("B*")[0]
h0 = 0x67452301
h1 = 0xEFCDAB89
h2 = 0x98BADCFE
h3 = 0x10325476
h4 = 0xC3D2E1F0
len = message_in_bits.length
bits = message_in_bits
bits << "1"
bits << "0" * (512 - ((bits.length + 64) % 512))
bits << "%064b" % len
chunked = chunker(bits, 512)
i = 0
while i < chunked.length
m = []
message = chunker(chunked[i], 32)
message.each_with_index { |word, index| m[index] = word.to_i(2) }
(16..79).each { |word|
m[word] = lor((m[word-3] ^ m[word-8] ^ m[word-14] ^ m[word-16]), 1) & 0xFFFFFFFF
}
a = h0
b = h1
c = h2
d = h3
e = h4
(0..79).each { |word|
if (0..19).include? word
f = ((b & c) | (~b & d))
k = 0x5A827999
end
if (20..39).include? word
f = (b ^ c ^ d)
k = 0x6ED9EBA1
end
if (40..59).include? word
f = (b & c) | (b & d) | (c & d)
k = 0x8F1BBCDC
end
if (60..79).include? word
f = (b ^ c ^ d)
k = 0xCA62C1D6
end
temp = (lor(a, 5) + f + e + k + m[word]) & 0xFFFFFFFF
e = d
d = c
c = lor(b, 30)
b = a
a = temp
}
h0 = (h0 + a) & 0xFFFFFFFF
h1 = (h1 + b) & 0xFFFFFFFF
h2 = (h2 + c) & 0xFFFFFFFF
h3 = (h3 + d) & 0xFFFFFFFF
h4 = (h4 + e) & 0xFFFFFFFF
i = i + 1
end
("%08x" % h0).concat("%08x" % h1).concat("%08x" % h2).concat("%08x" % h3).concat("%08x" % h4)
end

+ 26
- 6
shamwow_test.rb View File

@ -3,9 +3,12 @@
require_relative "shamwow"
require "test/unit"
require 'digest'
class TestShamwow < Test::Unit::TestCase
@@preamble = "We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
@@gettysburg = "Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal. Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth."
def test_ror
assert_equal(0, ror(0, 0))
assert_equal(0x80000000, ror(1, 1))
@ -14,10 +17,21 @@ class TestShamwow < Test::Unit::TestCase
assert_equal("01111111111111111111111111111111".to_i(2), ror("11111111111111111111111111111110".to_i(2), 1))
assert_equal("10111111111111110111111111111111".to_i(2), ror("11111111111111011111111111111110".to_i(2), 2))
assert_equal("11111111111111011111111111111110".to_i(2), ror("11111111111111011111111111111110".to_i(2), 32))
assert_equal("01111111111111111111111111111111".to_i(2), ror("11111111111111111111111111111110".to_i(2), 33))
assert_equal("11111111111111111111111111111110".to_i(2), ror("011111111111111111111111111111101".to_i(2), 1))
end
def test_lor
assert_equal(0, lor(0, 0))
assert_equal(2, lor(1, 1))
assert_equal(6, lor(3, 1))
assert_equal("00000000000000000000000000000010".to_i(2), lor("00000000000000000000000000000001".to_i(2), 1))
assert_equal("10000000000000000000000000000010".to_i(2), lor("01000000000000000000000000000001".to_i(2), 1))
assert_equal("00000000000000000000000000000101".to_i(2), lor("01000000000000000000000000000001".to_i(2), 2))
assert_equal("11111111111111011111111111111110".to_i(2), lor("11111111111111011111111111111110".to_i(2), 32))
assert_equal("11111111111111111111111111111011".to_i(2), lor("011111111111111111111111111111101".to_i(2), 1))
assert_equal("11111111111111111111111111111011".to_i(2), lor("111111111111111111111111111111101".to_i(2), 1))
end
def test_sha2
assert_equal(Digest::SHA2.hexdigest(''), sha2(""))
assert_equal(Digest::SHA2.hexdigest('abc'), sha2("abc"))
@ -26,11 +40,17 @@ class TestShamwow < Test::Unit::TestCase
assert_equal(Digest::SHA2.hexdigest("ЁЂЃЄЅІЇЈЉЊЋЌЍЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюя"), sha2("ЁЂЃЄЅІЇЈЉЊЋЌЍЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюя"))
assert_equal(Digest::SHA2.hexdigest("𝕿𝖍𝖊 𝖖𝖚𝖎𝖈𝖐 𝖇𝖗𝖔𝖜𝖓 𝖋𝖔𝖝 𝖏𝖚𝖒𝖕𝖘 𝖔𝖛𝖊𝖗 𝖙𝖍𝖊 𝖑𝖆𝖟𝖞 𝖉𝖔𝖌"), sha2("𝕿𝖍𝖊 𝖖𝖚𝖎𝖈𝖐 𝖇𝖗𝖔𝖜𝖓 𝖋𝖔𝖝 𝖏𝖚𝖒𝖕𝖘 𝖔𝖛𝖊𝖗 𝖙𝖍𝖊 𝖑𝖆𝖟𝖞 𝖉𝖔𝖌"))
preamble = "We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
assert_equal(Digest::SHA2.hexdigest(preamble), sha2(preamble))
assert_equal(Digest::SHA2.hexdigest(@@preamble), sha2(@@preamble))
assert_equal(Digest::SHA2.hexdigest(@@gettysburg), sha2(@@gettysburg))
end
def test_sha1
assert_equal(Digest::SHA1.hexdigest(''), sha1(''))
assert_equal(Digest::SHA1.hexdigest('abc'), sha1('abc'))
assert_equal(Digest::SHA1.hexdigest("𝕿𝖍𝖊 𝖖𝖚𝖎𝖈𝖐 𝖇𝖗𝖔𝖜𝖓 𝖋𝖔𝖝 𝖏𝖚𝖒𝖕𝖘 𝖔𝖛𝖊𝖗 𝖙𝖍𝖊 𝖑𝖆𝖟𝖞 𝖉𝖔𝖌"), sha1("𝕿𝖍𝖊 𝖖𝖚𝖎𝖈𝖐 𝖇𝖗𝖔𝖜𝖓 𝖋𝖔𝖝 𝖏𝖚𝖒𝖕𝖘 𝖔𝖛𝖊𝖗 𝖙𝖍𝖊 𝖑𝖆𝖟𝖞 𝖉𝖔𝖌"))
gettysburg = "Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal. Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth."
assert_equal(Digest::SHA2.hexdigest(gettysburg), sha2(gettysburg))
assert_equal(Digest::SHA1.hexdigest(@@preamble), sha1(@@preamble))
assert_equal(Digest::SHA1.hexdigest(@@gettysburg), sha1(@@gettysburg))
end
end

Loading…
Cancel
Save