Data update

Task/MD5-Implementation/Pluto/md5-implementation.pluto

@@ -0,0 +1,126 @@
+require "table2"
+
+local k = {
+    0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
+    0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
+    0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
+    0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
+    0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
+    0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
+    0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
+    0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
+    0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
+    0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
+    0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
+    0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
+    0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
+    0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
+    0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
+    0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
+}
+
+local r = {
+    7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
+    5,  9, 14, 20, 5,  9, 14, 20, 5,  9, 14, 20, 5,  9, 14, 20,
+    4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
+    6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21
+}
+
+local mask32 = 0xffffffff
+
+local function left_rotate(x, c)
+    x &= mask32
+    return ((x << c) | (x >> (32 - c))) & mask32
+end
+
+local function to_bytes(val)
+    local bytes = {0, 0, 0, 0}
+    bytes[1] = val         & 255
+    bytes[2] = (val >> 8)  & 255
+    bytes[3] = (val >> 16) & 255
+    bytes[4] = (val >> 24) & 255
+    return bytes
+end
+
+local function to_int(bytes)
+    return bytes[1] | bytes[2] << 8 | bytes[3] << 16 | bytes[4] << 24
+end
+
+local function md5(initmsg)
+    local h0 = 0x67452301
+    local h1 = 0xefcdab89
+    local h2 = 0x98badcfe
+    local h3 = 0x10325476
+    local initbytes = {string.byte(initmsg, 1, -1)}
+    local initlen = #initbytes
+    local newlen = initlen + 1
+    while newlen % 64 != 56 do newlen += 1 end
+    local msg = table.rep(newlen + 8, 0)
+    for i = 1, initlen do msg[i] = initbytes[i] end
+    msg[initlen + 1] = 0x80  -- remaining bytes already 0
+    local lenbits = to_bytes(initlen * 8)
+    for i = newlen + 1, newlen + 4 do msg[i] = lenbits[i - newlen] end
+    local extrabits = to_bytes(initlen >> 29)
+    for i = newlen + 5, newlen + 8 do msg[i] = extrabits[i - newlen - 4] end
+    local offset = 0
+    local w = table.rep(16, 0)
+    while offset < newlen do
+        for i = 0, 15 do w[i + 1] = to_int(msg:slice(offset + i * 4 + 1, offset + i * 4 + 4)) end
+        local a = h0
+        local b = h1
+        local c = h2
+        local d = h3
+        local f
+        local g
+        for i = 0, 63 do
+            if i < 16 then
+                f = (b & c) | ((~b) & d)
+                g = i
+            elseif i < 32 then
+                f = (d & b) | ((~d) & c)
+                g = (5 * i + 1) % 16
+            elseif i < 48 then
+                f = b ~ c ~ d
+                g = (3 * i + 5) % 16
+            else
+                f = c ~ (b | (~d))
+                g = (7 * i) % 16
+            end
+            local temp = d
+            d = c
+            c = b
+            b = (b + left_rotate(a + f + k[i + 1] + w[g + 1], r[i + 1])) & mask32
+            a = temp
+        end
+        h0 = (h0 + a) & mask32
+        h1 = (h1 + b) & mask32
+        h2 = (h2 + c) & mask32
+        h3 = (h3 + d) & mask32
+        offset += 64
+    end
+    local digest = table.rep(16, 0)
+    local dbytes = to_bytes(h0)
+    for i = 1, 4 do digest[i] = dbytes[i] end
+    dbytes = to_bytes(h1)
+    for i = 1, 4 do digest[i + 4] = dbytes[i] end
+    dbytes = to_bytes(h2)
+    for i = 1, 4 do digest[i + 8] = dbytes[i] end
+    dbytes = to_bytes(h3)
+    for i = 1, 4 do digest[i + 12] = dbytes[i] end
+    return digest
+end
+
+local strings = {
+    "",
+    "a",
+    "abc",
+    "message digest",
+    "abcdefghijklmnopqrstuvwxyz",
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+    "12345678901234567890123456789012345678901234567890123456789012345678901234567890"
+}
+
+for strings as s do
+    local digest = "0x" .. md5(s):map(|e| -> string.format("%02x", e)):concat("")
+    print($"{digest} <== '{s}'")
+end