From bf21fbf73495ec2cf49c743d969f4969e2fac226 Mon Sep 17 00:00:00 2001 From: tema5002 Date: Sun, 9 Aug 2026 19:56:56 +0300 Subject: [PATCH] fix --- sha2.lua | 221 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ ssh.lua | 2 +- 2 files changed, 222 insertions(+), 1 deletion(-) create mode 100644 sha2.lua diff --git a/sha2.lua b/sha2.lua new file mode 100644 index 0000000..e99dd88 --- /dev/null +++ b/sha2.lua @@ -0,0 +1,221 @@ +-- Copyright (c) 2018 Phil Leblanc -- see LICENSE file +------------------------------------------------------------------------ + +-- SHA2-256 and SHA2-512 -- see RFC 6234 + + +-- sha2-256 initially based on code written by Roberto Ierusalimschy +-- for an early Lua 5.3rc with (un)packint() functions. +-- published by Roberto on the Lua mailing list +-- http://lua-users.org/lists/lua-l/2014-03/msg00851.html +-- can be distributed under the MIT License terms. see: +-- http://lua-users.org/lists/lua-l/2014-08/msg00628.html +-- +-- adapted to 5.3 (string.(un)pack()) --phil, 150827 +-- +-- optimized for performance, 181008. The core permutation +-- for sha2-256 and sha2-512 is lifted from the very good +-- implementation by Egor Skriptunoff, also MIT-licensed. See +-- https://github.com/Egor-Skriptunoff/pure_lua_SHA2 + + +------------------------------------------------------------ +-- local declarations + +local string, assert = string, assert +local spack, sunpack = string.pack, string.unpack + +------------------------------------------------------------------------ +-- sha256 + +-- Initialize table of round constants +-- (first 32 bits of the fractional parts of the cube roots of the first +-- 64 primes 2..311) +local k256 = { + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2, +} + +local function pad64(msg, len) + local extra = (64 - ((len + 1 + 8) % 64)) % 64 + len = spack(">I8", len * 8) -- original len in bits, coded + msg = msg .. "\128" .. string.rep("\0", extra) .. len + assert(#msg % 64 == 0) + return msg +end + +local ww256 = {} + +local function sha256 (msg) + msg = pad64(msg, #msg) + local h1, h2, h3, h4, h5, h6, h7, h8 = + 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, + 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 + local k = k256 + local w = ww256 + local mlen = #msg + -- Process the message in successive 512-bit (64 bytes) chunks: + for i = 1, mlen, 64 do + w[1], w[2], w[3], w[4], w[5], w[6], w[7], w[8], + w[9], w[10], w[11], w[12], w[13], w[14], w[15], w[16] + = sunpack(">I4I4I4I4I4I4I4I4I4I4I4I4I4I4I4I4", msg, i) + -- mix msg block in state + for j = 17, 64 do + local x = w[j - 15]; x = (x << 32) | x + local y = w[j - 2]; y = (y << 32) | y + w[j] = ( ((x >> 7) ~ (x >> 18) ~ (x >> 35)) + + ((y >> 17) ~ (y >> 19) ~ (y >> 42)) + + w[j - 7] + w[j - 16] ) & 0xffffffff + end + local a, b, c, d, e, f, g, h = h1, h2, h3, h4, h5, h6, h7, h8 + -- main state permutation + for j = 1, 64 do + e = (e << 32) | (e & 0xffffffff) + local t1 = ((e >> 6) ~ (e >> 11) ~ (e >> 25)) + + (g ~ e & (f ~ g)) + h + k[j] + w[j] + h = g + g = f + f = e + e = (d + t1) + d = c + c = b + b = a + a = (a << 32) | (a & 0xffffffff) + a = t1 + ((a ~ c) & d ~ a & c) + + ((a >> 2) ~ (a >> 13) ~ (a >> 22)) + end + h1 = h1 + a + h2 = h2 + b + h3 = h3 + c + h4 = h4 + d + h5 = h5 + e + h6 = h6 + f + h7 = h7 + g + h8 = h8 + h + end + -- clamp hash to 32-bit words + h1 = h1 & 0xffffffff + h2 = h2 & 0xffffffff + h3 = h3 & 0xffffffff + h4 = h4 & 0xffffffff + h5 = h5 & 0xffffffff + h6 = h6 & 0xffffffff + h7 = h7 & 0xffffffff + h8 = h8 & 0xffffffff + -- return hash as a binary string + return spack(">I4I4I4I4I4I4I4I4", h1, h2, h3, h4, h5, h6, h7, h8) +end --sha256 + +------------------------------------------------------------------------ +-- sha512 + +local k512 = { +0x428a2f98d728ae22,0x7137449123ef65cd,0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc, +0x3956c25bf348b538,0x59f111f1b605d019,0x923f82a4af194f9b,0xab1c5ed5da6d8118, +0xd807aa98a3030242,0x12835b0145706fbe,0x243185be4ee4b28c,0x550c7dc3d5ffb4e2, +0x72be5d74f27b896f,0x80deb1fe3b1696b1,0x9bdc06a725c71235,0xc19bf174cf692694, +0xe49b69c19ef14ad2,0xefbe4786384f25e3,0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65, +0x2de92c6f592b0275,0x4a7484aa6ea6e483,0x5cb0a9dcbd41fbd4,0x76f988da831153b5, +0x983e5152ee66dfab,0xa831c66d2db43210,0xb00327c898fb213f,0xbf597fc7beef0ee4, +0xc6e00bf33da88fc2,0xd5a79147930aa725,0x06ca6351e003826f,0x142929670a0e6e70, +0x27b70a8546d22ffc,0x2e1b21385c26c926,0x4d2c6dfc5ac42aed,0x53380d139d95b3df, +0x650a73548baf63de,0x766a0abb3c77b2a8,0x81c2c92e47edaee6,0x92722c851482353b, +0xa2bfe8a14cf10364,0xa81a664bbc423001,0xc24b8b70d0f89791,0xc76c51a30654be30, +0xd192e819d6ef5218,0xd69906245565a910,0xf40e35855771202a,0x106aa07032bbd1b8, +0x19a4c116b8d2d0c8,0x1e376c085141ab53,0x2748774cdf8eeb99,0x34b0bcb5e19b48a8, +0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb,0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3, +0x748f82ee5defb2fc,0x78a5636f43172f60,0x84c87814a1f0ab72,0x8cc702081a6439ec, +0x90befffa23631e28,0xa4506cebde82bde9,0xbef9a3f7b2c67915,0xc67178f2e372532b, +0xca273eceea26619c,0xd186b8c721c0c207,0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178, +0x06f067aa72176fba,0x0a637dc5a2c898a6,0x113f9804bef90dae,0x1b710b35131c471b, +0x28db77f523047d84,0x32caab7b40c72493,0x3c9ebe0a15c9bebc,0x431d67c49c100d4c, +0x4cc5d4becb3e42b6,0x597f299cfc657e2a,0x5fcb6fab3ad6faec,0x6c44198c4a475817 +} + +local function pad128(msg, len) + local extra = (128 - ((len + 1 + 16) % 128)) % 128 + -- msg length in bit is encoded as a **128**-bit big endian integer + len = spack(">I16", len * 8) -- original len in bits, encoded + msg = msg .. "\128" .. string.rep("\0", extra) .. len + return msg +end + +local ww512 = {} + +local function sha512 (msg) + msg = pad128(msg, #msg) + local h1, h2, h3, h4, h5, h6, h7, h8 = + 0x6a09e667f3bcc908, 0xbb67ae8584caa73b, + 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1, + 0x510e527fade682d1, 0x9b05688c2b3e6c1f, + 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179 + local k = k512 + local w = ww512 -- 80 * i64 state + local mlen = #msg + -- Process the message as 128-byte blocks: + -- (this is borrowed to Egor Skriptunoff's pure_lua_SHA2 + -- https://github.com/Egor-Skriptunoff/pure_lua_SHA2) + for i = 1, mlen, 128 do + w[1], w[2], w[3], w[4], w[5], w[6], w[7], w[8], + w[9], w[10], w[11], w[12], w[13], w[14], w[15], w[16] + = sunpack(">i8i8i8i8i8i8i8i8i8i8i8i8i8i8i8i8", msg, i) + -- mix msg block in state + + for j = 17, 80 do + local a = w[j-15] + local b = w[j-2] + w[j] = (a >> 1 ~ a >> 7 ~ a >> 8 ~ a << 56 ~ a << 63) + + (b >> 6 ~ b >> 19 ~ b >> 61 ~ b << 3 ~ b << 45) + + w[j-7] + w[j-16] + end + local a, b, c, d, e, f, g, h = h1, h2, h3, h4, h5, h6, h7, h8 + -- main state permutation + for j = 1, 80 do + local z = (e >> 14 ~ e >> 18 ~ e >> 41 ~ e << 23 + ~ e << 46 ~ e << 50) + + (g ~ e & (f ~ g)) + h + k[j] + w[j] + h = g + g = f + f = e + e = z + d + d = c + c = b + b = a + a = z + ((a ~ c) & d ~ a & c) + + (a >> 28 ~ a >> 34 ~ a >> 39 ~ a << 25 + ~ a << 30 ~ a << 36) + end + h1 = h1 + a + h2 = h2 + b + h3 = h3 + c + h4 = h4 + d + h5 = h5 + e + h6 = h6 + f + h7 = h7 + g + h8 = h8 + h + end + -- return hash as a binary string + return spack(">i8i8i8i8i8i8i8i8", h1, h2, h3, h4, h5, h6, h7, h8) +end --sha512 + +------------------------------------------------------------------------ + +return { + sha256 = sha256, + sha512 = sha512, +} + diff --git a/ssh.lua b/ssh.lua index 041a3d4..c338834 100644 --- a/ssh.lua +++ b/ssh.lua @@ -22,7 +22,7 @@ local function lazy_require(name) end local x25519 = lazy_require("x25519") -local sha2 = lazy_require("sha256") +local sha2 = lazy_require("sha2") local function parse_ssh_version(str) local proto, software, comments = str:match("^SSH%-(%d+%.%d+)%-(%S+)%s?(.*)\r\n$")