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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.md"
local ctypes = require "resty.openssl.auxiliary.ctypes"
local ctx_lib = require "resty.openssl.ctx"
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 md_ctx_ptr_ct = ffi.typeof('EVP_MD_CTX*')

function _M.new(typ, properties)
  local ctx = C.EVP_MD_CTX_new()
  if ctx == nil then
    return nil, "digest.new: failed to create EVP_MD_CTX"
  end
  ffi_gc(ctx, C.EVP_MD_CTX_free)

  local err_new = string.format("digest.new: invalid digest type \"%s\"", typ)

  local algo
  if typ == "null" then
    algo = C.EVP_md_null()
  else
    if OPENSSL_3X then
      algo = C.EVP_MD_fetch(ctx_lib.get_libctx(), typ or 'sha1', properties)
      ffi_gc(algo, C.EVP_MD_free)
    else
      algo = C.EVP_get_digestbyname(typ or 'sha1')
    end
    if algo == nil then
      return nil, format_error(err_new)
    end
  end

  local code = C.EVP_DigestInit_ex(ctx, algo, nil)
  if code ~= 1 then
    return nil, format_error(err_new)
  end

  return setmetatable({
    ctx = ctx,
    algo = algo,
    buf = ctypes.uchar_array(OPENSSL_3X and C.EVP_MD_get_size(algo) or C.EVP_MD_size(algo)),
  }, mt), nil
end

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

function _M:get_provider_name()
  if not OPENSSL_3X then
    return false, "digest:get_provider_name is not supported"
  end
  local p = C.EVP_MD_get0_provider(self.algo)
  if p == nil then
    return nil
  end
  return ffi_str(C.OSSL_PROVIDER_get0_name(p))
end

if OPENSSL_3X then
  local param_lib = require "resty.openssl.param"
  _M.settable_params, _M.set_params, _M.gettable_params, _M.get_param = param_lib.get_params_func("EVP_MD_CTX")
end

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

local result_length = ctypes.ptr_of_uint()

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

  -- no return value of EVP_DigestFinal_ex
  C.EVP_DigestFinal_ex(self.ctx, self.buf, result_length)
  if result_length[0] == nil or result_length[0] <= 0 then
    return nil, format_error("digest:final: EVP_DigestFinal_ex")
  end
  return ffi_str(self.buf, result_length[0])
end


function _M:reset()
  local code = C.EVP_DigestInit_ex(self.ctx, self.algo, nil)
  if code ~= 1 then
    return false, format_error("digest: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