Lua AES加解密

local aes = require "resty.aes"
local str = require "resty.string"
local aes_128_cbc_md5 = aes:new("cQZEdZFA10OS")-- 需要自己写一个函数将16进制转2进制
function hex2bin(hexstr)local str = ""for i = 1, string.len(hexstr) - 1, 2 dolocal doublebytestr = string.sub(hexstr, i, i+1);local n = tonumber(doublebytestr, 16);if 0 == n thenstr = str .. '\00'elsestr = str .. string.format("%c", n)endendreturn str
end-- 加密函数,返回16进制
local function encrypt(content)local encrypted = aes_128_cbc_md5:encrypt(content)return str.to_hex(encrypted)
end--  解密函数 返回解密字符串
local function dencrypt(content)
local dencrypted = aes_128_cbc_md5:decrypt(hex2bin(content))
return dencrypted
endngx.say(encrypt('123456'))
ngx.say(dencrypt('55858b90358c48d507c3901312b4f20a'))

resty/aes.lua

-- Copyright (C) by Yichun Zhang (agentzh)--local asn1 = require "resty.asn1"
local ffi = require "ffi"
local ffi_new = ffi.new
local ffi_gc = ffi.gc
local ffi_str = ffi.string
local ffi_copy = ffi.copy
local C = ffi.C
local setmetatable = setmetatable
--local error = error
local type = typelocal _M = { _VERSION = '0.09' }local mt = { __index = _M }ffi.cdef[[
typedef struct engine_st ENGINE;typedef struct evp_cipher_st EVP_CIPHER;
typedef struct evp_cipher_ctx_st
{
const EVP_CIPHER *cipher;
ENGINE *engine;
int encrypt;
int buf_len;unsigned char  oiv[16];
unsigned char  iv[16];
unsigned char buf[32];
int num;void *app_data;
int key_len;
unsigned long flags;
void *cipher_data;
int final_used;
int block_mask;
unsigned char final[32];
} EVP_CIPHER_CTX;typedef struct env_md_ctx_st EVP_MD_CTX;
typedef struct env_md_st EVP_MD;const EVP_MD *EVP_md5(void);
const EVP_MD *EVP_sha(void);
const EVP_MD *EVP_sha1(void);
const EVP_MD *EVP_sha224(void);
const EVP_MD *EVP_sha256(void);
const EVP_MD *EVP_sha384(void);
const EVP_MD *EVP_sha512(void);const EVP_CIPHER *EVP_aes_128_ecb(void);
const EVP_CIPHER *EVP_aes_128_cbc(void);
const EVP_CIPHER *EVP_aes_128_cfb1(void);
const EVP_CIPHER *EVP_aes_128_cfb8(void);
const EVP_CIPHER *EVP_aes_128_cfb128(void);
const EVP_CIPHER *EVP_aes_128_ofb(void);
const EVP_CIPHER *EVP_aes_128_ctr(void);
const EVP_CIPHER *EVP_aes_192_ecb(void);
const EVP_CIPHER *EVP_aes_192_cbc(void);
const EVP_CIPHER *EVP_aes_192_cfb1(void);
const EVP_CIPHER *EVP_aes_192_cfb8(void);
const EVP_CIPHER *EVP_aes_192_cfb128(void);
const EVP_CIPHER *EVP_aes_192_ofb(void);
const EVP_CIPHER *EVP_aes_192_ctr(void);
const EVP_CIPHER *EVP_aes_256_ecb(void);
const EVP_CIPHER *EVP_aes_256_cbc(void);
const EVP_CIPHER *EVP_aes_256_cfb1(void);
const EVP_CIPHER *EVP_aes_256_cfb8(void);
const EVP_CIPHER *EVP_aes_256_cfb128(void);
const EVP_CIPHER *EVP_aes_256_ofb(void);void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *a);
int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *a);int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher,ENGINE *impl, unsigned char *key, const unsigned char *iv);int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,const unsigned char *in, int inl);int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher,ENGINE *impl, unsigned char *key, const unsigned char *iv);int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,const unsigned char *in, int inl);int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm, int *outl);int EVP_BytesToKey(const EVP_CIPHER *type,const EVP_MD *md,const unsigned char *salt, const unsigned char *data, int datal,int count, unsigned char *key,unsigned char *iv);
]]local ctx_ptr_type = ffi.typeof("EVP_CIPHER_CTX[1]")local hash
hash = {md5 = C.EVP_md5(),sha1 = C.EVP_sha1(),sha224 = C.EVP_sha224(),sha256 = C.EVP_sha256(),sha384 = C.EVP_sha384(),sha512 = C.EVP_sha512()
}
_M.hash = hashlocal cipher
cipher = function (size, _cipher)local _size = size or 128local _cipher = _cipher or "cbc"local func = "EVP_aes_" .. _size .. "_" .. _cipherif C[func] thenreturn { size=_size, cipher=_cipher, method=C[func]()}elsereturn nilend
end
_M.cipher = cipherfunction _M.new(self, key, salt, _cipher, _hash, hash_rounds)local encrypt_ctx = ffi_new(ctx_ptr_type)local decrypt_ctx = ffi_new(ctx_ptr_type)local _cipher = _cipher or cipher()local _hash = _hash or hash.md5local hash_rounds = hash_rounds or 1local _cipherLength = _cipher.size/8local gen_key = ffi_new("unsigned char[?]",_cipherLength)local gen_iv = ffi_new("unsigned char[?]",_cipherLength)if type(_hash) == "table" thenif not _hash.iv or #_hash.iv ~= 16 thenreturn nil, "bad iv"endif _hash.method thenlocal tmp_key = _hash.method(key)if #tmp_key ~= _cipherLength thenreturn nil, "bad key length"endffi_copy(gen_key, tmp_key, _cipherLength)elseif #key ~= _cipherLength thenreturn nil, "bad key length"elseffi_copy(gen_key, key, _cipherLength)endffi_copy(gen_iv, _hash.iv, 16)elseif salt and #salt ~= 8 thenreturn nil, "salt must be 8 characters or nil"endif C.EVP_BytesToKey(_cipher.method, _hash, salt, key, #key,hash_rounds, gen_key, gen_iv)~= _cipherLengththenreturn nilendendC.EVP_CIPHER_CTX_init(encrypt_ctx)C.EVP_CIPHER_CTX_init(decrypt_ctx)if C.EVP_EncryptInit_ex(encrypt_ctx, _cipher.method, nil,gen_key, gen_iv) == 0 orC.EVP_DecryptInit_ex(decrypt_ctx, _cipher.method, nil,gen_key, gen_iv) == 0 thenreturn nilendffi_gc(encrypt_ctx, C.EVP_CIPHER_CTX_cleanup)ffi_gc(decrypt_ctx, C.EVP_CIPHER_CTX_cleanup)return setmetatable({_encrypt_ctx = encrypt_ctx,_decrypt_ctx = decrypt_ctx}, mt)
endfunction _M.encrypt(self, s)local s_len = #slocal max_len = s_len + 16local buf = ffi_new("unsigned char[?]", max_len)local out_len = ffi_new("int[1]")local tmp_len = ffi_new("int[1]")local ctx = self._encrypt_ctxif C.EVP_EncryptInit_ex(ctx, nil, nil, nil, nil) == 0 thenreturn nilendif C.EVP_EncryptUpdate(ctx, buf, out_len, s, s_len) == 0 thenreturn nilendif C.EVP_EncryptFinal_ex(ctx, buf + out_len[0], tmp_len) == 0 thenreturn nilendreturn ffi_str(buf, out_len[0] + tmp_len[0])
endfunction _M.decrypt(self, s)local s_len = #slocal buf = ffi_new("unsigned char[?]", s_len)local out_len = ffi_new("int[1]")local tmp_len = ffi_new("int[1]")local ctx = self._decrypt_ctxif C.EVP_DecryptInit_ex(ctx, nil, nil, nil, nil) == 0 thenreturn nilendif C.EVP_DecryptUpdate(ctx, buf, out_len, s, s_len) == 0 thenreturn nilendif C.EVP_DecryptFinal_ex(ctx, buf + out_len[0], tmp_len) == 0 thenreturn nilendreturn ffi_str(buf, out_len[0] + tmp_len[0])
endreturn _M

OK.

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