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//opt/imunify360-webshield/lualib/resty/openssl/crypto.lua
local ffi = require "ffi" local ffi_cast = ffi.cast local C = ffi.C require "resty.openssl.include.crypto" local _M = {} function _M.memcmp(a, b, len) if type(len) ~= "number" or len < 1 then return nil, "crypto:memcmp arg 'len' must be a number > 0" end if type(a) ~= "string" and type(a) ~= "cdata" then return nil, "crypto:memcmp only strings and cdata types are supported" end return C.CRYPTO_memcmp(ffi_cast("void*", a), ffi_cast("void*", b), len) end return _M
