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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/migration/S3Stream.h"
#include "common/armor.h"
#include "common/ceph_crypto.h"
#include "common/ceph_time.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/AsioEngine.h"
#include "librbd/ImageCtx.h"
#include "librbd/Utils.h"
#include "librbd/asio/Utils.h"
#include "librbd/io/AioCompletion.h"
#include "librbd/io/ReadResult.h"
#include "librbd/migration/HttpClient.h"
#include "librbd/migration/HttpProcessorInterface.h"
#include <boost/beast/http.hpp>
#undef FMT_HEADER_ONLY
#define FMT_HEADER_ONLY 1
#include <fmt/chrono.h>
#include <fmt/format.h>
#include <time.h>
namespace librbd {
namespace migration {
using HttpRequest = boost::beast::http::request<boost::beast::http::empty_body>;
namespace {
const std::string URL_KEY {"url"};
const std::string ACCESS_KEY {"access_key"};
const std::string SECRET_KEY {"secret_key"};
} // anonymous namespace
template <typename I>
struct S3Stream<I>::HttpProcessor : public HttpProcessorInterface {
S3Stream* s3stream;
HttpProcessor(S3Stream* s3stream) : s3stream(s3stream) {
}
void process_request(EmptyRequest& request) override {
s3stream->process_request(request);
}
};
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::migration::S3Stream: " << this \
<< " " << __func__ << ": "
template <typename I>
S3Stream<I>::S3Stream(I* image_ctx, const json_spirit::mObject& json_object)
: m_image_ctx(image_ctx), m_cct(image_ctx->cct),
m_asio_engine(image_ctx->asio_engine), m_json_object(json_object),
m_http_processor(std::make_unique<HttpProcessor>(this)) {
}
template <typename I>
S3Stream<I>::~S3Stream() {
}
template <typename I>
void S3Stream<I>::open(Context* on_finish) {
auto& url_value = m_json_object[URL_KEY];
if (url_value.type() != json_spirit::str_type) {
lderr(m_cct) << "failed to locate '" << URL_KEY << "' key" << dendl;
on_finish->complete(-EINVAL);
return;
}
auto& access_key = m_json_object[ACCESS_KEY];
if (access_key.type() != json_spirit::str_type) {
lderr(m_cct) << "failed to locate '" << ACCESS_KEY << "' key" << dendl;
on_finish->complete(-EINVAL);
return;
}
auto& secret_key = m_json_object[SECRET_KEY];
if (secret_key.type() != json_spirit::str_type) {
lderr(m_cct) << "failed to locate '" << SECRET_KEY << "' key" << dendl;
on_finish->complete(-EINVAL);
return;
}
m_url = url_value.get_str();
librados::Rados rados(m_image_ctx->md_ctx);
int r = 0;
m_access_key = access_key.get_str();
if (util::is_config_key_uri(m_access_key)) {
r = util::get_config_key(rados, m_access_key, &m_access_key);
if (r < 0) {
lderr(m_cct) << "failed to retrieve access key from config: "
<< cpp_strerror(r) << dendl;
on_finish->complete(r);
return;
}
}
m_secret_key = secret_key.get_str();
if (util::is_config_key_uri(m_secret_key)) {
r = util::get_config_key(rados, m_secret_key, &m_secret_key);
if (r < 0) {
lderr(m_cct) << "failed to retrieve secret key from config: "
<< cpp_strerror(r) << dendl;
on_finish->complete(r);
return;
}
}
ldout(m_cct, 10) << "url=" << m_url << ", "
<< "access_key=" << m_access_key << dendl;
m_http_client.reset(HttpClient<I>::create(m_image_ctx, m_url));
m_http_client->set_http_processor(m_http_processor.get());
m_http_client->open(on_finish);
}
template <typename I>
void S3Stream<I>::close(Context* on_finish) {
ldout(m_cct, 10) << dendl;
if (!m_http_client) {
on_finish->complete(0);
return;
}
m_http_client->close(on_finish);
}
template <typename I>
void S3Stream<I>::get_size(uint64_t* size, Context* on_finish) {
ldout(m_cct, 10) << dendl;
m_http_client->get_size(size, on_finish);
}
template <typename I>
void S3Stream<I>::read(io::Extents&& byte_extents, bufferlist* data,
Context* on_finish) {
ldout(m_cct, 20) << "byte_extents=" << byte_extents << dendl;
m_http_client->read(std::move(byte_extents), data, on_finish);
}
template <typename I>
void S3Stream<I>::process_request(HttpRequest& http_request) {
ldout(m_cct, 20) << dendl;
// format RFC 1123 date/time
auto time = ceph::real_clock::to_time_t(ceph::real_clock::now());
struct tm timeInfo;
gmtime_r(&time, &timeInfo);
std::string date = fmt::format("{:%a, %d %b %Y %H:%M:%S %z}", timeInfo);
http_request.set(boost::beast::http::field::date, date);
// note: we don't support S3 subresources
std::string canonicalized_resource = std::string(http_request.target());
std::string string_to_sign = fmt::format(
"{}\n\n\n{}\n{}",
std::string(boost::beast::http::to_string(http_request.method())),
date, canonicalized_resource);
// create HMAC-SHA1 signature from secret key + string-to-sign
sha1_digest_t digest;
ceph::crypto::HMACSHA1 hmac(
reinterpret_cast<const unsigned char*>(m_secret_key.data()),
m_secret_key.size());
hmac.Update(reinterpret_cast<const unsigned char*>(string_to_sign.data()),
string_to_sign.size());
hmac.Final(reinterpret_cast<unsigned char*>(digest.v));
// base64 encode the result
char buf[64];
int r = ceph_armor(std::begin(buf), std::begin(buf) + sizeof(buf),
reinterpret_cast<const char *>(digest.v),
reinterpret_cast<const char *>(digest.v + digest.SIZE));
if (r < 0) {
ceph_abort("ceph_armor failed");
}
// store the access-key + signature in the HTTP authorization header
std::string signature = std::string(std::begin(buf), std::begin(buf) + r);
std::string authorization = fmt::format("AWS {}:{}", m_access_key, signature);
http_request.set(boost::beast::http::field::authorization, authorization);
ldout(m_cct, 20) << "string_to_sign=" << string_to_sign << ", "
<< "authorization=" << authorization << dendl;
}
} // namespace migration
} // namespace librbd
template class librbd::migration::S3Stream<librbd::ImageCtx>;
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