因公司项目使用了网上一个PHP国密加解密的算法,现有开源的lua国密加解密无法正常解密,故将此PHP加解密算法改写为lua版本。原PHP版本链接地址:
https://blog.csdn.net/weixin_42024325/article/details/128134887
以下为对应的lua版本(openresty环境):
local index = {} local function __andBit(left, right) --与 return (left == 1 and right == 1) and 1 or 0 end local function __orBit(left, right) --或 return (left == 1 or right == 1) and 1 or 0 end local function __xorBit(left, right) --异或 return (left + right) == 1 and 1 or 0 end local function __base(left, right, op) --对每一位进行op运算,然后将值返回 if left < right then left, right = right, left end local res = 0 local shift = 1 while left ~= 0 do local ra = left % 2 --取得每一位(最右边) local rb = right % 2 res = shift * op(ra, rb) + res shift = shift * 2 left = math.modf(left / 2) --右移 right = math.modf(right / 2) end return res end -- 按位与 local function andOp(left, right) return __base(left, right, __andBit) end -- 按位异或 local function xorOp(left, right) return __base(left, right, __xorBit) end -- 按位或 local function orOp(left, right) return __base(left, right, __orBit) end local function notOp(left) return left > 0 and -(left + 1) or -left - 1 end -- 按位左移 local function lShiftOp(left, num) --left左移num位 return left * (2 ^ num) end -- 按位右移 local function rShiftOp(left, num) --right右移num位 return math.floor(left / (2 ^ num)) end local SM4_CK = { 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 }; local SM4_SBOX = { 0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, 0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8, 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, 0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, 0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f, 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, 0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, 0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48 } local SM4_FK = { 0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC }; local rk = {} local _block_size = 16 -- string 2 bytes local function unpackStr(str) local result = {} for i = 1, #str do result[i] = string.byte(str, i) end return result end local function sm4Rotl32(buf, n) return orOp(andOp(lShiftOp(buf, n), 0xffffffff), rShiftOp(buf, 32 - n)) end -- 密钥key键表 local function sM4KeySchedule(key) local key = unpackStr(key) local round_key = {} for i = 0, 3 do round_key[i + 1] = xorOp(SM4_FK[i + 1], orOp( lShiftOp(key[4 * i + 1], 24), orOp( lShiftOp(key[4 * i + 1 + 1], 16), orOp( lShiftOp(key[4 * i + 1 + 2], 8), key[4 * i + 1 + 3] ) ) )) end for j = 0, 31 do local tmp = xorOp(xorOp(xorOp(round_key[j + 1 + 1], round_key[j + 1 + 2]), round_key[j + 1 + 3]), SM4_CK[j + 1]) local buf = orOp( orOp( orOp( lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 24), 0xff) + 1], 24), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 16), 0xff) + 1], 16) ), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 8), 0xff) + 1], 8) ), SM4_SBOX[andOp(tmp, 0xff) + 1] ) round_key[j + 4 + 1] = xorOp( round_key[j + 1], xorOp( xorOp(buf, sm4Rotl32(buf, 13)), sm4Rotl32(buf, 23) ) ) rk[j + 1] = round_key[j + 4 + 1] end return rk end -- 分割数组 local function array_chunk(arr, size) local chunks = {} local chunk_index = 1 for i = 1, #arr, size do chunks[chunk_index] = {} for j = i, i + size - 1 do if arr[j] then table.insert(chunks[chunk_index], arr[j]) end end chunk_index = chunk_index + 1 end return chunks end -- bytes转string local function bytesToString(bytes) return string.format(string.rep('%c', #bytes), table.unpack(bytes)); end local function array_slice(array, offset, length) local slice = {} local start_index = offset + 1 local end_index = offset + length for i = start_index, end_index do if array[i] ~= nil then table.insert(slice, array[i]) end end return slice end -- 填充 local function pad(data) local bytes = unpackStr(data) local rem = _block_size - #bytes % _block_size; for i = 1, rem do table.insert(bytes, rem) end return bytes end -- 逆填充 local function un_pad(string) local bytes = unpackStr(string) local rem = bytes[#bytes] bytes = array_slice(bytes, 0, #bytes - rem) return bytesToString(bytes) end -- 加密 local function sM4Encrypt(plainText) local x = {} for i = 0, 3 do x[i + 1] = orOp(orOp( orOp( lShiftOp(plainText[i * 4 + 1], 24), lShiftOp(plainText[i * 4 + 1 + 1], 16) ), lShiftOp(plainText[i * 4 + 1 + 2], 8)), plainText[i * 4 + 1 + 3]) end for j = 0, 31 do local tmp = xorOp(xorOp(xorOp(x[j + 1 + 1], x[j + 1 + 2]), x[j + 1 + 3]), rk[j + 1]) local buf = orOp( orOp( orOp( lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 24), 0xff) + 1], 24), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 16), 0xff) + 1], 16) ), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 8), 0xff) + 1], 8) ), SM4_SBOX[andOp(tmp, 0xff) + 1] ) x[j + 4 + 1] = xorOp( x[j + 1], xorOp(xorOp(xorOp(xorOp(buf, sm4Rotl32(buf, 2)), sm4Rotl32(buf, 10)), sm4Rotl32(buf, 18)), sm4Rotl32(buf, 24)) ) end local cipherText = {} for i = 0, 3 do cipherText[i * 4 + 1] = andOp(rShiftOp(x[36 - i], 24), 0xff) cipherText[i * 4 + 1 + 1] = andOp(rShiftOp(x[36 - i], 16), 0xff) cipherText[i * 4 + 1 + 2] = andOp(rShiftOp(x[36 - i], 8), 0xff) cipherText[i * 4 + 1 + 3] = andOp(x[36 - i], 0xff) end return bytesToString(cipherText) end -- 解密 local function sM4Decrypt(plainText) local x = {} for i = 0, 3 do x[i + 1] = orOp(orOp( orOp( lShiftOp(plainText[i * 4 + 1], 24), lShiftOp(plainText[i * 4 + 1 + 1], 16) ), lShiftOp(plainText[i * 4 + 1 + 2], 8)), plainText[i * 4 + 1 + 3]) end for j = 0, 31 do local tmp = xorOp(xorOp(xorOp(x[j + 1 + 1], x[j + 1 + 2]), x[j + 1 + 3]), rk[32 - j]) local buf = orOp( orOp( orOp( lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 24), 0xff) + 1], 24), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 16), 0xff) + 1], 16) ), lShiftOp(SM4_SBOX[andOp(rShiftOp(tmp, 8), 0xff) + 1], 8) ), SM4_SBOX[andOp(tmp, 0xff) + 1] ) x[j + 4 + 1] = xorOp( x[j + 1], xorOp(xorOp(xorOp(xorOp(buf, sm4Rotl32(buf, 2)), sm4Rotl32(buf, 10)), sm4Rotl32(buf, 18)), sm4Rotl32(buf, 24)) ) end local cipherText = {} for i = 0, 3 do cipherText[i * 4 + 1] = andOp(rShiftOp(x[36 - i], 24), 0xff) cipherText[i * 4 + 1 + 1] = andOp(rShiftOp(x[36 - i], 16), 0xff) cipherText[i * 4 + 1 + 2] = andOp(rShiftOp(x[36 - i], 8), 0xff) cipherText[i * 4 + 1 + 3] = andOp(x[36 - i], 0xff) end return bytesToString(cipherText) end -- 对字符串加密 function index:sm4_encode() local key = '743ee4a18e3210af' sM4KeySchedule(key) local str = 'hello word' local bytes = pad(str) local chunks = array_chunk(bytes, _block_size) local ciphertext = ""; for _, chunk in pairs(chunks) do ciphertext = ciphertext .. sM4Encrypt(chunk) end dump(ngx.encode_base64(ciphertext)) end -- 对字符串解密 function index:sm4_decode() local key = '743ee4a18e3210af' local str = ngx.decode_base64('f0qhGmgsaE9CO5kPLdTxlQ==') if #str < 0 or (#str % _block_size ~= 0) then return false; end sM4KeySchedule(key) local bytes = unpackStr(str) local chunks = array_chunk(bytes, _block_size) local ciphertext = ""; for _, chunk in pairs(chunks) do ciphertext = ciphertext .. sM4Decrypt(chunk) end ciphertext = un_pad(ciphertext) dump(ciphertext) end return index