-- Copyright (C) by Yichun Zhang (agentzh) require "resty.sha" local ffi = require "ffi" local ffi_new = ffi.new local ffi_str = ffi.string local C = ffi.C local setmetatable = setmetatable --local error = error local _M = { _VERSION = '0.16' } local mt = { __index = _M } ffi.cdef[[ typedef struct SHAstate_st { SHA_LONG h0,h1,h2,h3,h4; SHA_LONG Nl,Nh; SHA_LONG data[SHA_LBLOCK]; unsigned int num; } SHA_CTX; int SHA1_Init(SHA_CTX *c); int SHA1_Update(SHA_CTX *c, const void *data, size_t len); int SHA1_Final(unsigned char *md, SHA_CTX *c); ]] local digest_len = 20 local buf = ffi_new("char[?]", digest_len) local ctx_ptr_type = ffi.typeof("SHA_CTX[1]") function _M.new(self) local ctx = ffi_new(ctx_ptr_type) if C.SHA1_Init(ctx) == 0 then return nil end return setmetatable({ _ctx = ctx }, mt) end function _M.update(self, s) return C.SHA1_Update(self._ctx, s, #s) == 1 end function _M.final(self) if C.SHA1_Final(buf, self._ctx) == 1 then return ffi_str(buf, digest_len) end return nil end function _M.reset(self) return C.SHA1_Init(self._ctx) == 1 end return _M