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local ffi = require "ffi"
local C = ffi.C
local ffi_gc = ffi.gc
local ffi_str = ffi.string

require "resty.openssl.include.evp.mac"
local param_lib = require "resty.openssl.param"
local ctx_lib = require "resty.openssl.ctx"
local ctypes = require "resty.openssl.auxiliary.ctypes"
local format_error = require("resty.openssl.err").format_error
local OPENSSL_3X = require("resty.openssl.version").OPENSSL_3X

local _M = {}
local mt = {__index = _M}

local mac_ctx_ptr_ct = ffi.typeof('EVP_MAC_CTX*')
local param_types = {
  cipher = param_lib.OSSL_PARAM_UTF8_STRING,
  digest = param_lib.OSSL_PARAM_UTF8_STRING,
}
local params = {}

function _M.new(key, typ, cipher, digest, properties)
  if not OPENSSL_3X then
    return false, "EVP_MAC is only supported from OpenSSL 3.0"
  end

  local algo = C.EVP_MAC_fetch(ctx_lib.get_libctx(), typ, properties)
  if algo == nil then
    return nil, format_error(string.format("mac.new: invalid mac type \"%s\"", typ))
  end
  ffi_gc(algo, C.EVP_MAC_free)

  local ctx = C.EVP_MAC_CTX_new(algo)
  if ctx == nil then
    return nil, "mac.new: failed to create EVP_MAC_CTX"
  end
  ffi_gc(ctx, C.EVP_MAC_CTX_free)
  
  params.digest = digest
  params.cipher = cipher
  local p = param_lib.construct(params, 2, param_types)

  local keyl = #key
  local code = C.EVP_MAC_init(ctx, key, keyl, p)
  if code ~= 1 then
    return nil, format_error(string.format("mac.new: invalid cipher or digest type"))
  end

  local md_size = C.EVP_MAC_CTX_get_mac_size(ctx)

  return setmetatable({
    ctx = ctx,
    algo = algo,
    buf = ctypes.uchar_array(md_size),
    buf_size = md_size,
    _reset = function() return C.EVP_MAC_init(ctx, key, keyl, p) end,
  }, mt), nil
end

function _M.istype(l)
  return l and l.ctx and ffi.istype(mac_ctx_ptr_ct, l.ctx)
end

function _M:get_provider_name()
  local p = C.EVP_MAC_get0_provider(self.algo)
  if p == nil then
    return nil
  end
  return ffi_str(C.OSSL_PROVIDER_get0_name(p))
end

_M.settable_params, _M.set_params, _M.gettable_params, _M.get_param = param_lib.get_params_func("EVP_MAC_CTX")

function _M:update(...)
  for _, s in ipairs({...}) do
    if C.EVP_MAC_update(self.ctx, s, #s) ~= 1 then
      return false, format_error("mac:update")
    end
  end
  return true, nil
end

function _M:final(s)
  if s then
    if C.EVP_MAC_update(self.ctx, s, #s) ~= 1 then
      return false, format_error("mac:final")
    end
  end

  local length = ctypes.ptr_of_size_t()
  if C.EVP_MAC_final(self.ctx, self.buf, length, self.buf_size) ~= 1 then
    return nil, format_error("mac:final: EVP_MAC_final")
  end
  return ffi_str(self.buf, length[0])
end

function _M:reset()
  local code = self._reset()
  if code ~= 1 then
    return false, format_error("mac:reset")
  end

  return true
end

return _M

Filemanager

DIR : / opt/ imunify360-webshield/ lualib/ resty/ openssl/
Name Type Size Permission Actions
auxiliary Folder 0755
include Folder 0755
x509 Folder 0755
asn1.lua File 2.53 KB 0644
bn.lua File 9.36 KB 0644
cipher.lua File 8.79 KB 0644
crypto.lua File 489 B 0644
ctx.lua File 1.59 KB 0644
dh.lua File 2.59 KB 0644
digest.lua File 2.67 KB 0644
ec.lua File 5.04 KB 0644
ecx.lua File 2.02 KB 0644
err.lua File 2.94 KB 0644
hmac.lua File 1.95 KB 0644
kdf.lua File 11.26 KB 0644
mac.lua File 2.71 KB 0644
objects.lua File 1.69 KB 0644
param.lua File 10.92 KB 0644
pkcs12.lua File 4.72 KB 0644
pkey.lua File 31.17 KB 0644
provider.lua File 3.44 KB 0644
rand.lua File 1.33 KB 0644
rsa.lua File 3.43 KB 0644
ssl.lua File 8.56 KB 0644
ssl_ctx.lua File 2.11 KB 0644
stack.lua File 3.69 KB 0644
version.lua File 2.86 KB 0644