md5.cc

/* Copyright 2016 Google Inc. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/

#include "md5.h"
#include <assert.h>

namespace google {
namespace service_control_client {

MD5::MD5() : finalized_(false) { MD5_Init(&ctx_); }

MD5& MD5::Update(const void* data, size_t size) {
  // Not update after finalized.
  assert(!finalized_);
  MD5_Update(&ctx_, data, size);
  return *this;
}

std::string MD5::Digest() {
  if (!finalized_) {
    MD5_Final(digest_, &ctx_);
    finalized_ = true;
  }
  return std::string(reinterpret_cast<char*>(digest_), kDigestLength);
}

std::string MD5::DebugString(const std::string& digest) {
  assert(digest.size() == kDigestLength);
  char buf[kDigestLength * 2 + 1];
  char* p = buf;
  for (int i = 0; i < kDigestLength; i++, p += 2) {
    sprintf(p, "%02x", (unsigned char)digest[i]);
  }
  *p = 0;
  return std::string(buf, kDigestLength * 2);
}

std::string MD5::operator()(const void* data, size_t size) {
  return Update(data, size).Digest();
}

}  // namespace service_control_client
}  // namespace google