如何使用 luacrypto？

Lua无法找到库。您应该看到一个带有搜索该文件位置的错误。例如：

[string "REPL"]:1: module 'crypto' not found:No LuaRocks module found for crypto
        no field package.preload['crypto']
        no file '/home/phil/.luarocks/share/lua/5.1/crypto.lua'
        no file '/home/phil/.luarocks/share/lua/5.1/crypto/init.lua'
        no file '/usr/local/share/lua/5.1/crypto.lua'
        no file '/usr/local/share/lua/5.1/crypto/init.lua'
        no file './crypto.lua'
        no file '/usr/local/lib/lua/5.1/crypto.lua'
        no file '/usr/local/lib/lua/5.1/crypto/init.lua'
        no file '/usr/share/lua/5.1/crypto.lua'
        no file '/usr/share/lua/5.1/crypto/init.lua'
        no file '/home/phil/.luarocks/lib/lua/5.1/crypto.so'
        no file '/usr/local/lib/lua/5.1/crypto.so'
        no file './crypto.so'
        no file '/usr/lib/x86_64-linux-gnu/lua/5.1/crypto.so'
        no file '/usr/lib/lua/5.1/crypto.so'
        no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
        /usr/local/share/lua/5.1/repl/init.lua:73: in function </usr/local/share/lua/5.1/repl/init.lua:72>
        (tail call): ?
        [C]: in function 'require'
        [string "REPL"]:1: in main chunk
        [C]: in function 'xpcall'
        /usr/local/share/lua/5.1/repl/init.lua:101: in function 'old_value'
        /usr/local/share/lua/5.1/repl/init.lua:250: in function 'handleline'
        /usr/local/share/lua/5.1/repl/sync.lua:33: in function 'run'
        ...r/local/lib/luarocks/rocks/luarepl/0.8-1/bin/rep.lua:41: in main chunk
        [C]: ?

另一种方法是，您可以通过软件包管理器[luarocks]（https://luarocks.org）进行安装：

$ luarocks search luacrypto

Search results:
===============

Rockspecs and source rocks:
---------------------------

luacrypto
   0.3.2-2 (rockspec) - https://luarocks.org
   0.3.2-2 (src) - https://luarocks.org
   0.3.2-1 (rockspec) - https://luarocks.org
   0.3.2-1 (src) - https://luarocks.org
   0.3.0.20120524-1 (rockspec) - https://luarocks.org
   0.3.0.20120524-1 (src) - https://luarocks.org
   0.2.0-2 (rockspec) - https://luarocks.org
   0.2.0-2 (src) - https://luarocks.org
   0.2.0-1 (rockspec) - https://luarocks.org
   0.2.0-1 (src) - https://luarocks.org

luacryptor
   1.0-1 (rockspec) - https://luarocks.org

并使用 luarocks install luacrypto 进行安装。

Philipp 是对的，缺少模块。如果我将 crypto.so 加入搜索路径，lua 代码 require "crypto" 就能工作了。 但我需要将 luacrypto 静态链接到我的 C++ 项目中。 我找到了以下解决方案。

//file.cpp:
luaopen_crypto(L);
lua_setglobal(L, "crypto");

-- file.lua:
--crypto = require "crypto"
print(crypto.hex("123"))

这只是一种解决办法。我将 crypto 设置为全局变量，并可以在 .lua 文件中使用它。但任何尝试调用 local crypto = require "crypto" 都将失败。