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foundationdb/fdbclient/S3BlobStore.actor.cpp

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/*
* S3BlobStore.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
*
* 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 "fdbclient/S3BlobStore.h"
#include "fdbclient/md5/md5.h"
#include "fdbclient/libb64/encode.h"
#include "fdbclient/sha1/SHA1.h"
#include <time.h>
#include <iomanip>
#if defined(HAVE_WOLFSSL)
#include <wolfssl/options.h>
#endif
#include <openssl/sha.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#if defined(HAVE_WOLFSSL)
#undef SHA1 // wolfSSL will will shadow FDB SHA1.h
#endif
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string.hpp>
#include "flow/IAsyncFile.h"
#include "flow/Hostname.h"
#include "flow/UnitTest.h"
#include "rapidxml/rapidxml.hpp"
#ifdef BUILD_AWS_BACKUP
#include "fdbclient/FDBAWSCredentialsProvider.h"
#endif
#include "flow/actorcompiler.h" // has to be last include
using namespace rapidxml;
json_spirit::mObject S3BlobStoreEndpoint::Stats::getJSON() {
json_spirit::mObject o;
o["requests_failed"] = requests_failed;
o["requests_successful"] = requests_successful;
o["bytes_sent"] = bytes_sent;
return o;
}
S3BlobStoreEndpoint::Stats S3BlobStoreEndpoint::Stats::operator-(const Stats& rhs) {
Stats r;
r.requests_failed = requests_failed - rhs.requests_failed;
r.requests_successful = requests_successful - rhs.requests_successful;
r.bytes_sent = bytes_sent - rhs.bytes_sent;
return r;
}
S3BlobStoreEndpoint::Stats S3BlobStoreEndpoint::s_stats;
S3BlobStoreEndpoint::BlobKnobs::BlobKnobs() {
secure_connection = 1;
connect_tries = CLIENT_KNOBS->BLOBSTORE_CONNECT_TRIES;
connect_timeout = CLIENT_KNOBS->BLOBSTORE_CONNECT_TIMEOUT;
max_connection_life = CLIENT_KNOBS->BLOBSTORE_MAX_CONNECTION_LIFE;
request_tries = CLIENT_KNOBS->BLOBSTORE_REQUEST_TRIES;
request_timeout_min = CLIENT_KNOBS->BLOBSTORE_REQUEST_TIMEOUT_MIN;
requests_per_second = CLIENT_KNOBS->BLOBSTORE_REQUESTS_PER_SECOND;
concurrent_requests = CLIENT_KNOBS->BLOBSTORE_CONCURRENT_REQUESTS;
list_requests_per_second = CLIENT_KNOBS->BLOBSTORE_LIST_REQUESTS_PER_SECOND;
write_requests_per_second = CLIENT_KNOBS->BLOBSTORE_WRITE_REQUESTS_PER_SECOND;
read_requests_per_second = CLIENT_KNOBS->BLOBSTORE_READ_REQUESTS_PER_SECOND;
delete_requests_per_second = CLIENT_KNOBS->BLOBSTORE_DELETE_REQUESTS_PER_SECOND;
multipart_max_part_size = CLIENT_KNOBS->BLOBSTORE_MULTIPART_MAX_PART_SIZE;
multipart_min_part_size = CLIENT_KNOBS->BLOBSTORE_MULTIPART_MIN_PART_SIZE;
concurrent_uploads = CLIENT_KNOBS->BLOBSTORE_CONCURRENT_UPLOADS;
concurrent_lists = CLIENT_KNOBS->BLOBSTORE_CONCURRENT_LISTS;
concurrent_reads_per_file = CLIENT_KNOBS->BLOBSTORE_CONCURRENT_READS_PER_FILE;
concurrent_writes_per_file = CLIENT_KNOBS->BLOBSTORE_CONCURRENT_WRITES_PER_FILE;
read_block_size = CLIENT_KNOBS->BLOBSTORE_READ_BLOCK_SIZE;
read_ahead_blocks = CLIENT_KNOBS->BLOBSTORE_READ_AHEAD_BLOCKS;
read_cache_blocks_per_file = CLIENT_KNOBS->BLOBSTORE_READ_CACHE_BLOCKS_PER_FILE;
max_send_bytes_per_second = CLIENT_KNOBS->BLOBSTORE_MAX_SEND_BYTES_PER_SECOND;
max_recv_bytes_per_second = CLIENT_KNOBS->BLOBSTORE_MAX_RECV_BYTES_PER_SECOND;
sdk_auth = false;
}
bool S3BlobStoreEndpoint::BlobKnobs::set(StringRef name, int value) {
#define TRY_PARAM(n, sn) \
if (name == LiteralStringRef(#n) || name == LiteralStringRef(#sn)) { \
n = value; \
return true; \
}
TRY_PARAM(secure_connection, sc)
TRY_PARAM(connect_tries, ct);
TRY_PARAM(connect_timeout, cto);
TRY_PARAM(max_connection_life, mcl);
TRY_PARAM(request_tries, rt);
TRY_PARAM(request_timeout_min, rtom);
// TODO: For backward compatibility because request_timeout was renamed to request_timeout_min
if (name == LiteralStringRef("request_timeout") || name == LiteralStringRef("rto")) {
request_timeout_min = value;
return true;
}
TRY_PARAM(requests_per_second, rps);
TRY_PARAM(list_requests_per_second, lrps);
TRY_PARAM(write_requests_per_second, wrps);
TRY_PARAM(read_requests_per_second, rrps);
TRY_PARAM(delete_requests_per_second, drps);
TRY_PARAM(concurrent_requests, cr);
TRY_PARAM(multipart_max_part_size, maxps);
TRY_PARAM(multipart_min_part_size, minps);
TRY_PARAM(concurrent_uploads, cu);
TRY_PARAM(concurrent_lists, cl);
TRY_PARAM(concurrent_reads_per_file, crpf);
TRY_PARAM(concurrent_writes_per_file, cwpf);
TRY_PARAM(read_block_size, rbs);
TRY_PARAM(read_ahead_blocks, rab);
TRY_PARAM(read_cache_blocks_per_file, rcb);
TRY_PARAM(max_send_bytes_per_second, sbps);
TRY_PARAM(max_recv_bytes_per_second, rbps);
TRY_PARAM(sdk_auth, sa);
#undef TRY_PARAM
return false;
}
// Returns an S3 Blob URL parameter string that specifies all of the non-default options for the endpoint using option
// short names.
std::string S3BlobStoreEndpoint::BlobKnobs::getURLParameters() const {
static BlobKnobs defaults;
std::string r;
#define _CHECK_PARAM(n, sn) \
if (n != defaults.n) { \
r += format("%s%s=%d", r.empty() ? "" : "&", #sn, n); \
}
_CHECK_PARAM(secure_connection, sc);
_CHECK_PARAM(connect_tries, ct);
_CHECK_PARAM(connect_timeout, cto);
_CHECK_PARAM(max_connection_life, mcl);
_CHECK_PARAM(request_tries, rt);
_CHECK_PARAM(request_timeout_min, rto);
_CHECK_PARAM(requests_per_second, rps);
_CHECK_PARAM(list_requests_per_second, lrps);
_CHECK_PARAM(write_requests_per_second, wrps);
_CHECK_PARAM(read_requests_per_second, rrps);
_CHECK_PARAM(delete_requests_per_second, drps);
_CHECK_PARAM(concurrent_requests, cr);
_CHECK_PARAM(multipart_max_part_size, maxps);
_CHECK_PARAM(multipart_min_part_size, minps);
_CHECK_PARAM(concurrent_uploads, cu);
_CHECK_PARAM(concurrent_lists, cl);
_CHECK_PARAM(concurrent_reads_per_file, crpf);
_CHECK_PARAM(concurrent_writes_per_file, cwpf);
_CHECK_PARAM(read_block_size, rbs);
_CHECK_PARAM(read_ahead_blocks, rab);
_CHECK_PARAM(read_cache_blocks_per_file, rcb);
_CHECK_PARAM(max_send_bytes_per_second, sbps);
_CHECK_PARAM(max_recv_bytes_per_second, rbps);
#undef _CHECK_PARAM
return r;
}
std::string guessRegionFromDomain(std::string domain) {
static const std::vector<const char*> knownServices = { "s3.", "cos.", "oss-", "obs." };
boost::algorithm::to_lower(domain);
for (int i = 0; i < knownServices.size(); ++i) {
const char* service = knownServices[i];
std::size_t p = domain.find(service);
if (p == std::string::npos || (p >= 1 && domain[p - 1] != '.')) {
// eg. 127.0.0.1, example.com, s3-service.example.com, mys3.example.com
continue;
}
StringRef h(domain.c_str() + p);
if (!h.startsWith(LiteralStringRef("oss-"))) {
h.eat(service); // ignore s3 service
}
return h.eat(".").toString();
}
return "";
}
Reference<S3BlobStoreEndpoint> S3BlobStoreEndpoint::fromString(const std::string& url,
const Optional<std::string>& proxy,
std::string* resourceFromURL,
std::string* error,
ParametersT* ignored_parameters) {
if (resourceFromURL)
resourceFromURL->clear();
try {
StringRef t(url);
StringRef prefix = t.eat("://");
if (prefix != LiteralStringRef("blobstore"))
throw format("Invalid blobstore URL prefix '%s'", prefix.toString().c_str());
Optional<std::string> proxyHost, proxyPort;
if (proxy.present()) {
StringRef proxyRef(proxy.get());
if (proxy.get().find("://") != std::string::npos) {
StringRef proxyPrefix = proxyRef.eat("://");
if (proxyPrefix != "http"_sr) {
throw format("Invalid proxy URL prefix '%s'. Either don't use a prefix, or use http://",
proxyPrefix.toString().c_str());
}
}
std::string proxyBody = proxyRef.eat().toString();
if (!Hostname::isHostname(proxyBody) && !NetworkAddress::parseOptional(proxyBody).present()) {
throw format("'%s' is not a valid value for proxy. Format should be either IP:port or host:port.",
proxyBody.c_str());
}
StringRef p(proxyBody);
proxyHost = p.eat(":").toString();
proxyPort = p.eat().toString();
}
Optional<StringRef> cred;
if (url.find("@") != std::string::npos) {
cred = t.eat("@");
}
uint8_t foundSeparator = 0;
StringRef hostPort = t.eatAny("/?", &foundSeparator);
StringRef resource;
if (foundSeparator == '/') {
resource = t.eat("?");
}
// hostPort is at least a host or IP address, optionally followed by :portNumber or :serviceName
StringRef h(hostPort);
StringRef host = h.eat(":");
if (host.size() == 0)
throw std::string("host cannot be empty");
StringRef service = h.eat();
std::string region = guessRegionFromDomain(host.toString());
BlobKnobs knobs;
HTTP::Headers extraHeaders;
while (1) {
StringRef name = t.eat("=");
if (name.size() == 0)
break;
StringRef value = t.eat("&");
// Special case for header
if (name == LiteralStringRef("header")) {
StringRef originalValue = value;
StringRef headerFieldName = value.eat(":");
StringRef headerFieldValue = value;
if (headerFieldName.size() == 0 || headerFieldValue.size() == 0) {
throw format("'%s' is not a valid value for '%s' parameter. Format is <FieldName>:<FieldValue> "
"where strings are not empty.",
originalValue.toString().c_str(),
name.toString().c_str());
}
std::string& fieldValue = extraHeaders[headerFieldName.toString()];
// RFC 2616 section 4.2 says header field names can repeat but only if it is valid to concatenate their
// values with comma separation
if (!fieldValue.empty()) {
fieldValue.append(",");
}
fieldValue.append(headerFieldValue.toString());
continue;
}
// overwrite s3 region from parameter
if (name == LiteralStringRef("region")) {
region = value.toString();
continue;
}
// See if the parameter is a knob
// First try setting a dummy value (all knobs are currently numeric) just to see if this parameter is known
// to S3BlobStoreEndpoint. If it is, then we will set it to a good value or throw below, so the dummy set
// has no bad side effects.
bool known = knobs.set(name, 0);
// If the parameter is not known to S3BlobStoreEndpoint then throw unless there is an ignored_parameters set
// to add it to
if (!known) {
if (ignored_parameters == nullptr) {
throw format("%s is not a valid parameter name", name.toString().c_str());
}
(*ignored_parameters)[name.toString()] = value.toString();
continue;
}
// The parameter is known to S3BlobStoreEndpoint so it must be numeric and valid.
char* valueEnd;
int ivalue = strtol(value.toString().c_str(), &valueEnd, 10);
if (*valueEnd || (ivalue == 0 && value.toString() != "0"))
throw format("%s is not a valid value for %s", value.toString().c_str(), name.toString().c_str());
// It should not be possible for this set to fail now since the dummy set above had to have worked.
ASSERT(knobs.set(name, ivalue));
}
if (resourceFromURL != nullptr)
*resourceFromURL = resource.toString();
Optional<S3BlobStoreEndpoint::Credentials> creds;
if (cred.present()) {
StringRef c(cred.get());
StringRef key = c.eat(":");
StringRef secret = c.eat(":");
StringRef securityToken = c.eat();
creds = S3BlobStoreEndpoint::Credentials{ key.toString(), secret.toString(), securityToken.toString() };
}
if (region.empty() && CLIENT_KNOBS->HTTP_REQUEST_AWS_V4_HEADER) {
throw std::string(
"Failed to get region from host or parameter in url, region is required for aws v4 signature");
}
return makeReference<S3BlobStoreEndpoint>(
host.toString(), service.toString(), region, proxyHost, proxyPort, creds, knobs, extraHeaders);
} catch (std::string& err) {
if (error != nullptr)
*error = err;
TraceEvent(SevWarnAlways, "S3BlobStoreEndpointBadURL")
.suppressFor(60)
.detail("Description", err)
.detail("Format", getURLFormat())
.detail("URL", url);
throw backup_invalid_url();
}
}
std::string S3BlobStoreEndpoint::getResourceURL(std::string resource, std::string params) const {
std::string hostPort = host;
if (!service.empty()) {
hostPort.append(":");
hostPort.append(service);
}
// If secret isn't being looked up from credentials files then it was passed explicitly in the URL so show it here.
std::string credsString;
if (credentials.present()) {
if (!lookupKey) {
credsString = credentials.get().key;
}
if (!lookupSecret) {
credsString += ":" + credentials.get().secret;
}
if (!lookupSecret) {
credsString +=
credentials.get().securityToken.empty()
? std::string(":") + credentials.get().secret
: std::string(":") + credentials.get().secret + std::string(":") + credentials.get().securityToken;
}
credsString += "@";
}
std::string r = format("blobstore://%s%s/%s", credsString.c_str(), hostPort.c_str(), resource.c_str());
// Get params that are deviations from knob defaults
std::string knobParams = knobs.getURLParameters();
if (!knobParams.empty()) {
if (!params.empty()) {
params.append("&");
}
params.append(knobParams);
}
for (const auto& [k, v] : extraHeaders) {
if (!params.empty()) {
params.append("&");
}
params.append("header=");
params.append(k);
params.append(":");
params.append(v);
}
if (!params.empty())
r.append("?").append(params);
return r;
}
std::string constructResourcePath(Reference<S3BlobStoreEndpoint> b,
const std::string& bucket,
const std::string& object) {
std::string resource;
if (b->getHost().find(bucket + ".") != 0) {
resource += std::string("/") + bucket; // not virtual hosting mode
}
if (!object.empty()) {
resource += "/";
resource += object;
}
return resource;
}
ACTOR Future<bool> bucketExists_impl(Reference<S3BlobStoreEndpoint> b, std::string bucket) {
wait(b->requestRateRead->getAllowance(1));
std::string resource = constructResourcePath(b, bucket, "");
HTTP::Headers headers;
Reference<HTTP::Response> r = wait(b->doRequest("HEAD", resource, headers, nullptr, 0, { 200, 404 }));
return r->code == 200;
}
Future<bool> S3BlobStoreEndpoint::bucketExists(std::string const& bucket) {
return bucketExists_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket);
}
ACTOR Future<bool> objectExists_impl(Reference<S3BlobStoreEndpoint> b, std::string bucket, std::string object) {
wait(b->requestRateRead->getAllowance(1));
std::string resource = constructResourcePath(b, bucket, object);
HTTP::Headers headers;
Reference<HTTP::Response> r = wait(b->doRequest("HEAD", resource, headers, nullptr, 0, { 200, 404 }));
return r->code == 200;
}
Future<bool> S3BlobStoreEndpoint::objectExists(std::string const& bucket, std::string const& object) {
return objectExists_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object);
}
ACTOR Future<Void> deleteObject_impl(Reference<S3BlobStoreEndpoint> b, std::string bucket, std::string object) {
wait(b->requestRateDelete->getAllowance(1));
std::string resource = constructResourcePath(b, bucket, object);
HTTP::Headers headers;
// 200 or 204 means object successfully deleted, 404 means it already doesn't exist, so any of those are considered
// successful
Reference<HTTP::Response> r = wait(b->doRequest("DELETE", resource, headers, nullptr, 0, { 200, 204, 404 }));
// But if the object already did not exist then the 'delete' is assumed to be successful but a warning is logged.
if (r->code == 404) {
TraceEvent(SevWarnAlways, "S3BlobStoreEndpointDeleteObjectMissing")
.detail("Host", b->host)
.detail("Bucket", bucket)
.detail("Object", object);
}
return Void();
}
Future<Void> S3BlobStoreEndpoint::deleteObject(std::string const& bucket, std::string const& object) {
return deleteObject_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object);
}
ACTOR Future<Void> deleteRecursively_impl(Reference<S3BlobStoreEndpoint> b,
std::string bucket,
std::string prefix,
int* pNumDeleted,
int64_t* pBytesDeleted) {
state PromiseStream<S3BlobStoreEndpoint::ListResult> resultStream;
// Start a recursive parallel listing which will send results to resultStream as they are received
state Future<Void> done = b->listObjectsStream(bucket, resultStream, prefix, '/', std::numeric_limits<int>::max());
// Wrap done in an actor which will send end_of_stream since listObjectsStream() does not (so that many calls can
// write to the same stream)
done = map(done, [=](Void) {
resultStream.sendError(end_of_stream());
return Void();
});
state std::list<Future<Void>> deleteFutures;
try {
loop {
choose {
// Throw if done throws, otherwise don't stop until end_of_stream
when(wait(done)) { done = Never(); }
when(S3BlobStoreEndpoint::ListResult list = waitNext(resultStream.getFuture())) {
for (auto& object : list.objects) {
deleteFutures.push_back(map(b->deleteObject(bucket, object.name), [=](Void) -> Void {
if (pNumDeleted != nullptr) {
++*pNumDeleted;
}
if (pBytesDeleted != nullptr) {
*pBytesDeleted += object.size;
}
return Void();
}));
}
}
}
// This is just a precaution to avoid having too many outstanding delete actors waiting to run
while (deleteFutures.size() > CLIENT_KNOBS->BLOBSTORE_CONCURRENT_REQUESTS) {
wait(deleteFutures.front());
deleteFutures.pop_front();
}
}
} catch (Error& e) {
if (e.code() != error_code_end_of_stream)
throw;
}
while (deleteFutures.size() > 0) {
wait(deleteFutures.front());
deleteFutures.pop_front();
}
return Void();
}
Future<Void> S3BlobStoreEndpoint::deleteRecursively(std::string const& bucket,
std::string prefix,
int* pNumDeleted,
int64_t* pBytesDeleted) {
return deleteRecursively_impl(
Reference<S3BlobStoreEndpoint>::addRef(this), bucket, prefix, pNumDeleted, pBytesDeleted);
}
ACTOR Future<Void> createBucket_impl(Reference<S3BlobStoreEndpoint> b, std::string bucket) {
wait(b->requestRateWrite->getAllowance(1));
bool exists = wait(b->bucketExists(bucket));
if (!exists) {
std::string resource = constructResourcePath(b, bucket, "");
HTTP::Headers headers;
std::string region = b->getRegion();
if (region.empty()) {
Reference<HTTP::Response> r = wait(b->doRequest("PUT", resource, headers, nullptr, 0, { 200, 409 }));
} else {
UnsentPacketQueue packets;
StringRef body(format("<CreateBucketConfiguration xmlns=\"http://s3.amazonaws.com/doc/2006-03-01/\">"
" <LocationConstraint>%s</LocationConstraint>"
"</CreateBucketConfiguration>",
region.c_str()));
PacketWriter pw(packets.getWriteBuffer(), nullptr, Unversioned());
pw.serializeBytes(body);
Reference<HTTP::Response> r =
wait(b->doRequest("PUT", resource, headers, &packets, body.size(), { 200, 409 }));
}
}
return Void();
}
Future<Void> S3BlobStoreEndpoint::createBucket(std::string const& bucket) {
return createBucket_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket);
}
ACTOR Future<int64_t> objectSize_impl(Reference<S3BlobStoreEndpoint> b, std::string bucket, std::string object) {
wait(b->requestRateRead->getAllowance(1));
std::string resource = constructResourcePath(b, bucket, object);
HTTP::Headers headers;
Reference<HTTP::Response> r = wait(b->doRequest("HEAD", resource, headers, nullptr, 0, { 200, 404 }));
if (r->code == 404)
throw file_not_found();
return r->contentLen;
}
Future<int64_t> S3BlobStoreEndpoint::objectSize(std::string const& bucket, std::string const& object) {
return objectSize_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object);
}
// Try to read a file, parse it as JSON, and return the resulting document.
// It will NOT throw if any errors are encountered, it will just return an empty
// JSON object and will log trace events for the errors encountered.
ACTOR Future<Optional<json_spirit::mObject>> tryReadJSONFile(std::string path) {
state std::string content;
// Event type to be logged in the event of an exception
state const char* errorEventType = "BlobCredentialFileError";
try {
state Reference<IAsyncFile> f = wait(IAsyncFileSystem::filesystem()->open(
path, IAsyncFile::OPEN_NO_AIO | IAsyncFile::OPEN_READONLY | IAsyncFile::OPEN_UNCACHED, 0));
state int64_t size = wait(f->size());
state Standalone<StringRef> buf = makeString(size);
int r = wait(f->read(mutateString(buf), size, 0));
ASSERT(r == size);
content = buf.toString();
// Any exceptions from hehre forward are parse failures
errorEventType = "BlobCredentialFileParseFailed";
json_spirit::mValue json;
json_spirit::read_string(content, json);
if (json.type() == json_spirit::obj_type)
return json.get_obj();
else
TraceEvent(SevWarn, "BlobCredentialFileNotJSONObject").suppressFor(60).detail("File", path);
} catch (Error& e) {
if (e.code() != error_code_actor_cancelled)
TraceEvent(SevWarn, errorEventType).errorUnsuppressed(e).suppressFor(60).detail("File", path);
}
return Optional<json_spirit::mObject>();
}
// If the credentials expire, the connection will eventually fail and be discarded from the pool, and then a new
// connection will be constructed, which will call this again to get updated credentials
static S3BlobStoreEndpoint::Credentials getSecretSdk() {
#ifdef BUILD_AWS_BACKUP
double elapsed = -timer_monotonic();
Aws::Auth::AWSCredentials awsCreds = FDBAWSCredentialsProvider::getAwsCredentials();
elapsed += timer_monotonic();
if (awsCreds.IsEmpty()) {
TraceEvent(SevWarn, "S3BlobStoreAWSCredsEmpty");
throw backup_auth_missing();
}
S3BlobStoreEndpoint::Credentials fdbCreds;
fdbCreds.key = awsCreds.GetAWSAccessKeyId();
fdbCreds.secret = awsCreds.GetAWSSecretKey();
fdbCreds.securityToken = awsCreds.GetSessionToken();
TraceEvent("S3BlobStoreGotSdkCredentials").suppressFor(60).detail("Duration", elapsed);
return fdbCreds;
#else
TraceEvent(SevError, "S3BlobStoreNoSDK");
throw backup_auth_missing();
#endif
}
ACTOR Future<Void> updateSecret_impl(Reference<S3BlobStoreEndpoint> b) {
if (b->knobs.sdk_auth) {
b->credentials = getSecretSdk();
return Void();
}
std::vector<std::string>* pFiles = (std::vector<std::string>*)g_network->global(INetwork::enBlobCredentialFiles);
if (pFiles == nullptr)
return Void();
if (!b->credentials.present()) {
return Void();
}
state std::vector<Future<Optional<json_spirit::mObject>>> reads;
for (auto& f : *pFiles)
reads.push_back(tryReadJSONFile(f));
wait(waitForAll(reads));
std::string accessKey = b->lookupKey ? "" : b->credentials.get().key;
std::string credentialsFileKey = accessKey + "@" + b->host;
int invalid = 0;
for (auto& f : reads) {
// If value not present then the credentials file wasn't readable or valid. Continue to check other results.
if (!f.get().present()) {
++invalid;
continue;
}
JSONDoc doc(f.get().get());
if (doc.has("accounts") && doc.last().type() == json_spirit::obj_type) {
JSONDoc accounts(doc.last().get_obj());
if (accounts.has(credentialsFileKey, false) && accounts.last().type() == json_spirit::obj_type) {
JSONDoc account(accounts.last());
S3BlobStoreEndpoint::Credentials creds = b->credentials.get();
if (b->lookupKey) {
std::string apiKey;
if (account.tryGet("api_key", apiKey))
creds.key = apiKey;
else
continue;
}
if (b->lookupSecret) {
std::string secret;
if (account.tryGet("secret", secret))
creds.secret = secret;
else
continue;
}
std::string token;
if (account.tryGet("token", token))
creds.securityToken = token;
b->credentials = creds;
return Void();
}
}
}
// If any sources were invalid
if (invalid > 0)
throw backup_auth_unreadable();
// All sources were valid but didn't contain the desired info
throw backup_auth_missing();
}
Future<Void> S3BlobStoreEndpoint::updateSecret() {
return updateSecret_impl(Reference<S3BlobStoreEndpoint>::addRef(this));
}
ACTOR Future<S3BlobStoreEndpoint::ReusableConnection> connect_impl(Reference<S3BlobStoreEndpoint> b) {
// First try to get a connection from the pool
while (!b->connectionPool.empty()) {
S3BlobStoreEndpoint::ReusableConnection rconn = b->connectionPool.front();
b->connectionPool.pop();
// If the connection expires in the future then return it
if (rconn.expirationTime > now()) {
TraceEvent("S3BlobStoreEndpointReusingConnected")
.suppressFor(60)
.detail("RemoteEndpoint", rconn.conn->getPeerAddress())
.detail("ExpiresIn", rconn.expirationTime - now());
return rconn;
}
}
std::string host = b->host, service = b->service;
if (service.empty()) {
if (b->useProxy) {
fprintf(stderr, "ERROR: Port can't be empty when using HTTP proxy.\n");
throw connection_failed();
}
service = b->knobs.secure_connection ? "https" : "http";
}
bool isTLS = b->knobs.secure_connection == 1;
if (b->useProxy) {
// TODO(renxuan): Support http proxy + TLS
if (isTLS || b->service == "443") {
fprintf(stderr, "ERROR: TLS is not supported yet when using HTTP proxy.\n");
throw connection_failed();
}
host = b->proxyHost.get();
service = b->proxyPort.get();
}
state Reference<IConnection> conn = wait(INetworkConnections::net()->connect(host, service, isTLS));
wait(conn->connectHandshake());
TraceEvent("S3BlobStoreEndpointNewConnection")
.suppressFor(60)
.detail("RemoteEndpoint", conn->getPeerAddress())
.detail("ExpiresIn", b->knobs.max_connection_life);
if (b->lookupKey || b->lookupSecret || b->knobs.sdk_auth)
wait(b->updateSecret());
return S3BlobStoreEndpoint::ReusableConnection({ conn, now() + b->knobs.max_connection_life });
}
Future<S3BlobStoreEndpoint::ReusableConnection> S3BlobStoreEndpoint::connect() {
return connect_impl(Reference<S3BlobStoreEndpoint>::addRef(this));
}
void S3BlobStoreEndpoint::returnConnection(ReusableConnection& rconn) {
// If it expires in the future then add it to the pool in the front
if (rconn.expirationTime > now())
connectionPool.push(rconn);
rconn.conn = Reference<IConnection>();
}
std::string awsCanonicalURI(const std::string& resource, std::vector<std::string>& queryParameters, bool isV4) {
StringRef resourceRef(resource);
resourceRef.eat("/");
std::string canonicalURI("/" + resourceRef.toString());
size_t q = canonicalURI.find_last_of('?');
if (q != canonicalURI.npos)
canonicalURI.resize(q);
if (isV4) {
canonicalURI = HTTP::awsV4URIEncode(canonicalURI, false);
} else {
canonicalURI = HTTP::urlEncode(canonicalURI);
}
// Create the canonical query string
std::string queryString;
q = resource.find_last_of('?');
if (q != queryString.npos)
queryString = resource.substr(q + 1);
StringRef qStr(queryString);
StringRef queryParameter;
while ((queryParameter = qStr.eat("&")) != StringRef()) {
StringRef param = queryParameter.eat("=");
StringRef value = queryParameter.eat();
if (isV4) {
queryParameters.push_back(HTTP::awsV4URIEncode(param.toString(), true) + "=" +
HTTP::awsV4URIEncode(value.toString(), true));
} else {
queryParameters.push_back(HTTP::urlEncode(param.toString()) + "=" + HTTP::urlEncode(value.toString()));
}
}
return canonicalURI;
}
// Do a request, get a Response.
// Request content is provided as UnsentPacketQueue *pContent which will be depleted as bytes are sent but the queue
// itself must live for the life of this actor and be destroyed by the caller
ACTOR Future<Reference<HTTP::Response>> doRequest_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string verb,
std::string resource,
HTTP::Headers headers,
UnsentPacketQueue* pContent,
int contentLen,
std::set<unsigned int> successCodes) {
state UnsentPacketQueue contentCopy;
headers["Content-Length"] = format("%d", contentLen);
headers["Host"] = bstore->host;
headers["Accept"] = "application/xml";
// Merge extraHeaders into headers
for (const auto& [k, v] : bstore->extraHeaders) {
std::string& fieldValue = headers[k];
if (!fieldValue.empty()) {
fieldValue.append(",");
}
fieldValue.append(v);
}
// For requests with content to upload, the request timeout should be at least twice the amount of time
// it would take to upload the content given the upload bandwidth and concurrency limits.
int bandwidthThisRequest = 1 + bstore->knobs.max_send_bytes_per_second / bstore->knobs.concurrent_uploads;
int contentUploadSeconds = contentLen / bandwidthThisRequest;
state int requestTimeout = std::max(bstore->knobs.request_timeout_min, 3 * contentUploadSeconds);
wait(bstore->concurrentRequests.take());
state FlowLock::Releaser globalReleaser(bstore->concurrentRequests, 1);
state int maxTries = std::min(bstore->knobs.request_tries, bstore->knobs.connect_tries);
state int thisTry = 1;
state double nextRetryDelay = 2.0;
loop {
state Optional<Error> err;
state Optional<NetworkAddress> remoteAddress;
state bool connectionEstablished = false;
state Reference<HTTP::Response> r;
state std::string canonicalURI = resource;
try {
// Start connecting
Future<S3BlobStoreEndpoint::ReusableConnection> frconn = bstore->connect();
// Make a shallow copy of the queue by calling addref() on each buffer in the chain and then prepending that
// chain to contentCopy
contentCopy.discardAll();
if (pContent != nullptr) {
PacketBuffer* pFirst = pContent->getUnsent();
PacketBuffer* pLast = nullptr;
for (PacketBuffer* p = pFirst; p != nullptr; p = p->nextPacketBuffer()) {
p->addref();
// Also reset the sent count on each buffer
p->bytes_sent = 0;
pLast = p;
}
contentCopy.prependWriteBuffer(pFirst, pLast);
}
// Finish connecting, do request
state S3BlobStoreEndpoint::ReusableConnection rconn =
wait(timeoutError(frconn, bstore->knobs.connect_timeout));
connectionEstablished = true;
// Finish/update the request headers (which includes Date header)
// This must be done AFTER the connection is ready because if credentials are coming from disk they are
// refreshed when a new connection is established and setAuthHeaders() would need the updated secret.
if (bstore->credentials.present() && !bstore->credentials.get().securityToken.empty())
headers["x-amz-security-token"] = bstore->credentials.get().securityToken;
if (CLIENT_KNOBS->HTTP_REQUEST_AWS_V4_HEADER) {
bstore->setV4AuthHeaders(verb, resource, headers);
} else {
bstore->setAuthHeaders(verb, resource, headers);
}
std::vector<std::string> queryParameters;
canonicalURI = awsCanonicalURI(resource, queryParameters, CLIENT_KNOBS->HTTP_REQUEST_AWS_V4_HEADER);
if (!queryParameters.empty()) {
canonicalURI += "?";
canonicalURI += boost::algorithm::join(queryParameters, "&");
}
if (bstore->useProxy) {
// Has to be in absolute-form.
canonicalURI = "http://" + bstore->host + ":" + bstore->service + canonicalURI;
}
remoteAddress = rconn.conn->getPeerAddress();
wait(bstore->requestRate->getAllowance(1));
Reference<HTTP::Response> _r = wait(timeoutError(HTTP::doRequest(rconn.conn,
verb,
canonicalURI,
headers,
&contentCopy,
contentLen,
bstore->sendRate,
&bstore->s_stats.bytes_sent,
bstore->recvRate),
requestTimeout));
r = _r;
// Since the response was parsed successfully (which is why we are here) reuse the connection unless we
// received the "Connection: close" header.
if (r->headers["Connection"] != "close")
bstore->returnConnection(rconn);
rconn.conn.clear();
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled)
throw;
err = e;
}
// If err is not present then r is valid.
// If r->code is in successCodes then record the successful request and return r.
if (!err.present() && successCodes.count(r->code) != 0) {
bstore->s_stats.requests_successful++;
return r;
}
// Otherwise, this request is considered failed. Update failure count.
bstore->s_stats.requests_failed++;
// All errors in err are potentially retryable as well as certain HTTP response codes...
bool retryable = err.present() || r->code == 500 || r->code == 502 || r->code == 503 || r->code == 429;
// But only if our previous attempt was not the last allowable try.
retryable = retryable && (thisTry < maxTries);
TraceEvent event(SevWarn,
retryable ? "S3BlobStoreEndpointRequestFailedRetryable" : "S3BlobStoreEndpointRequestFailed");
// Attach err to trace event if present, otherwise extract some stuff from the response
if (err.present()) {
event.errorUnsuppressed(err.get());
}
event.suppressFor(60);
if (!err.present()) {
event.detail("ResponseCode", r->code);
}
event.detail("ConnectionEstablished", connectionEstablished);
if (remoteAddress.present())
event.detail("RemoteEndpoint", remoteAddress.get());
else
event.detail("RemoteHost", bstore->host);
event.detail("Verb", verb).detail("Resource", resource).detail("ThisTry", thisTry);
// If r is not valid or not code 429 then increment the try count. 429's will not count against the attempt
// limit.
if (!r || r->code != 429)
++thisTry;
// We will wait delay seconds before the next retry, start with nextRetryDelay.
double delay = nextRetryDelay;
// Double but limit the *next* nextRetryDelay.
nextRetryDelay = std::min(nextRetryDelay * 2, 60.0);
if (retryable) {
// If r is valid then obey the Retry-After response header if present.
if (r) {
auto iRetryAfter = r->headers.find("Retry-After");
if (iRetryAfter != r->headers.end()) {
event.detail("RetryAfterHeader", iRetryAfter->second);
char* pEnd;
double retryAfter = strtod(iRetryAfter->second.c_str(), &pEnd);
if (*pEnd) // If there were other characters then don't trust the parsed value, use a probably safe
// value of 5 minutes.
retryAfter = 300;
// Update delay
delay = std::max(delay, retryAfter);
}
}
// Log the delay then wait.
event.detail("RetryDelay", delay);
wait(::delay(delay));
} else {
// We can't retry, so throw something.
// This error code means the authentication header was not accepted, likely the account or key is wrong.
if (r && r->code == 406)
throw http_not_accepted();
if (r && r->code == 401)
throw http_auth_failed();
// Recognize and throw specific errors
if (err.present()) {
int code = err.get().code();
// If we get a timed_out error during the the connect() phase, we'll call that connection_failed despite
// the fact that there was technically never a 'connection' to begin with. It differentiates between an
// active connection timing out vs a connection timing out, though not between an active connection
// failing vs connection attempt failing.
// TODO: Add more error types?
if (code == error_code_timed_out && !connectionEstablished)
throw connection_failed();
if (code == error_code_timed_out || code == error_code_connection_failed ||
code == error_code_lookup_failed)
throw err.get();
}
throw http_request_failed();
}
}
}
Future<Reference<HTTP::Response>> S3BlobStoreEndpoint::doRequest(std::string const& verb,
std::string const& resource,
const HTTP::Headers& headers,
UnsentPacketQueue* pContent,
int contentLen,
std::set<unsigned int> successCodes) {
return doRequest_impl(
Reference<S3BlobStoreEndpoint>::addRef(this), verb, resource, headers, pContent, contentLen, successCodes);
}
ACTOR Future<Void> listObjectsStream_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
PromiseStream<S3BlobStoreEndpoint::ListResult> results,
Optional<std::string> prefix,
Optional<char> delimiter,
int maxDepth,
std::function<bool(std::string const&)> recurseFilter) {
// Request 1000 keys at a time, the maximum allowed
state std::string resource = constructResourcePath(bstore, bucket, "");
resource.append("/?max-keys=1000");
if (prefix.present())
resource.append("&prefix=").append(prefix.get());
if (delimiter.present())
resource.append("&delimiter=").append(std::string(1, delimiter.get()));
resource.append("&marker=");
state std::string lastFile;
state bool more = true;
state std::vector<Future<Void>> subLists;
while (more) {
wait(bstore->concurrentLists.take());
state FlowLock::Releaser listReleaser(bstore->concurrentLists, 1);
HTTP::Headers headers;
state std::string fullResource = resource + lastFile;
lastFile.clear();
Reference<HTTP::Response> r = wait(bstore->doRequest("GET", fullResource, headers, nullptr, 0, { 200 }));
listReleaser.release();
try {
S3BlobStoreEndpoint::ListResult listResult;
xml_document<> doc;
// Copy content because rapidxml will modify it during parse
std::string content = r->content;
doc.parse<0>((char*)content.c_str());
// There should be exactly one node
xml_node<>* result = doc.first_node();
if (result == nullptr || strcmp(result->name(), "ListBucketResult") != 0) {
throw http_bad_response();
}
xml_node<>* n = result->first_node();
while (n != nullptr) {
const char* name = n->name();
if (strcmp(name, "IsTruncated") == 0) {
const char* val = n->value();
if (strcmp(val, "true") == 0) {
more = true;
} else if (strcmp(val, "false") == 0) {
more = false;
} else {
throw http_bad_response();
}
} else if (strcmp(name, "Contents") == 0) {
S3BlobStoreEndpoint::ObjectInfo object;
xml_node<>* key = n->first_node("Key");
if (key == nullptr) {
throw http_bad_response();
}
object.name = key->value();
xml_node<>* size = n->first_node("Size");
if (size == nullptr) {
throw http_bad_response();
}
object.size = strtoull(size->value(), nullptr, 10);
listResult.objects.push_back(object);
} else if (strcmp(name, "CommonPrefixes") == 0) {
xml_node<>* prefixNode = n->first_node("Prefix");
while (prefixNode != nullptr) {
const char* prefix = prefixNode->value();
// If recursing, queue a sub-request, otherwise add the common prefix to the result.
if (maxDepth > 0) {
// If there is no recurse filter or the filter returns true then start listing the subfolder
if (!recurseFilter || recurseFilter(prefix)) {
subLists.push_back(bstore->listObjectsStream(
bucket, results, prefix, delimiter, maxDepth - 1, recurseFilter));
}
// Since prefix will not be in the final listResult below we have to set lastFile here in
// case it's greater than the last object
lastFile = prefix;
} else {
listResult.commonPrefixes.push_back(prefix);
}
prefixNode = prefixNode->next_sibling("Prefix");
}
}
n = n->next_sibling();
}
results.send(listResult);
if (more) {
// lastFile will be the last commonprefix for which a sublist was started, if any.
// If there are any objects and the last one is greater than lastFile then make it the new lastFile.
if (!listResult.objects.empty() && lastFile < listResult.objects.back().name) {
lastFile = listResult.objects.back().name;
}
// If there are any common prefixes and the last one is greater than lastFile then make it the new
// lastFile.
if (!listResult.commonPrefixes.empty() && lastFile < listResult.commonPrefixes.back()) {
lastFile = listResult.commonPrefixes.back();
}
// If lastFile is empty at this point, something has gone wrong.
if (lastFile.empty()) {
TraceEvent(SevWarn, "S3BlobStoreEndpointListNoNextMarker")
.suppressFor(60)
.detail("Resource", fullResource);
throw http_bad_response();
}
}
} catch (Error& e) {
if (e.code() != error_code_actor_cancelled)
TraceEvent(SevWarn, "S3BlobStoreEndpointListResultParseError")
.errorUnsuppressed(e)
.suppressFor(60)
.detail("Resource", fullResource);
throw http_bad_response();
}
}
wait(waitForAll(subLists));
return Void();
}
Future<Void> S3BlobStoreEndpoint::listObjectsStream(std::string const& bucket,
PromiseStream<ListResult> results,
Optional<std::string> prefix,
Optional<char> delimiter,
int maxDepth,
std::function<bool(std::string const&)> recurseFilter) {
return listObjectsStream_impl(
Reference<S3BlobStoreEndpoint>::addRef(this), bucket, results, prefix, delimiter, maxDepth, recurseFilter);
}
ACTOR Future<S3BlobStoreEndpoint::ListResult> listObjects_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
Optional<std::string> prefix,
Optional<char> delimiter,
int maxDepth,
std::function<bool(std::string const&)> recurseFilter) {
state S3BlobStoreEndpoint::ListResult results;
state PromiseStream<S3BlobStoreEndpoint::ListResult> resultStream;
state Future<Void> done =
bstore->listObjectsStream(bucket, resultStream, prefix, delimiter, maxDepth, recurseFilter);
// Wrap done in an actor which sends end_of_stream because list does not so that many lists can write to the same
// stream
done = map(done, [=](Void) {
resultStream.sendError(end_of_stream());
return Void();
});
try {
loop {
choose {
// Throw if done throws, otherwise don't stop until end_of_stream
when(wait(done)) { done = Never(); }
when(S3BlobStoreEndpoint::ListResult info = waitNext(resultStream.getFuture())) {
results.commonPrefixes.insert(
results.commonPrefixes.end(), info.commonPrefixes.begin(), info.commonPrefixes.end());
results.objects.insert(results.objects.end(), info.objects.begin(), info.objects.end());
}
}
}
} catch (Error& e) {
if (e.code() != error_code_end_of_stream)
throw;
}
return results;
}
Future<S3BlobStoreEndpoint::ListResult> S3BlobStoreEndpoint::listObjects(
std::string const& bucket,
Optional<std::string> prefix,
Optional<char> delimiter,
int maxDepth,
std::function<bool(std::string const&)> recurseFilter) {
return listObjects_impl(
Reference<S3BlobStoreEndpoint>::addRef(this), bucket, prefix, delimiter, maxDepth, recurseFilter);
}
ACTOR Future<std::vector<std::string>> listBuckets_impl(Reference<S3BlobStoreEndpoint> bstore) {
state std::string resource = "/?marker=";
state std::string lastName;
state bool more = true;
state std::vector<std::string> buckets;
while (more) {
wait(bstore->concurrentLists.take());
state FlowLock::Releaser listReleaser(bstore->concurrentLists, 1);
HTTP::Headers headers;
state std::string fullResource = resource + lastName;
Reference<HTTP::Response> r = wait(bstore->doRequest("GET", fullResource, headers, nullptr, 0, { 200 }));
listReleaser.release();
try {
xml_document<> doc;
// Copy content because rapidxml will modify it during parse
std::string content = r->content;
doc.parse<0>((char*)content.c_str());
// There should be exactly one node
xml_node<>* result = doc.first_node();
if (result == nullptr || strcmp(result->name(), "ListAllMyBucketsResult") != 0) {
throw http_bad_response();
}
more = false;
xml_node<>* truncated = result->first_node("IsTruncated");
if (truncated != nullptr && strcmp(truncated->value(), "true") == 0) {
more = true;
}
xml_node<>* bucketsNode = result->first_node("Buckets");
if (bucketsNode != nullptr) {
xml_node<>* bucketNode = bucketsNode->first_node("Bucket");
while (bucketNode != nullptr) {
xml_node<>* nameNode = bucketNode->first_node("Name");
if (nameNode == nullptr) {
throw http_bad_response();
}
const char* name = nameNode->value();
buckets.push_back(name);
bucketNode = bucketNode->next_sibling("Bucket");
}
}
if (more) {
lastName = buckets.back();
}
} catch (Error& e) {
if (e.code() != error_code_actor_cancelled)
TraceEvent(SevWarn, "S3BlobStoreEndpointListBucketResultParseError")
.errorUnsuppressed(e)
.suppressFor(60)
.detail("Resource", fullResource);
throw http_bad_response();
}
}
return buckets;
}
Future<std::vector<std::string>> S3BlobStoreEndpoint::listBuckets() {
return listBuckets_impl(Reference<S3BlobStoreEndpoint>::addRef(this));
}
std::string S3BlobStoreEndpoint::hmac_sha1(Credentials const& creds, std::string const& msg) {
std::string key = creds.secret;
// Hash key to shorten it if it is longer than SHA1 block size
if (key.size() > 64) {
key = SHA1::from_string(key);
}
// Pad key up to SHA1 block size if needed
key.append(64 - key.size(), '\0');
std::string kipad = key;
for (int i = 0; i < 64; ++i)
kipad[i] ^= '\x36';
std::string kopad = key;
for (int i = 0; i < 64; ++i)
kopad[i] ^= '\x5c';
kipad.append(msg);
std::string hkipad = SHA1::from_string(kipad);
kopad.append(hkipad);
return SHA1::from_string(kopad);
}
std::string sha256_hex(std::string str) {
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
SHA256_Init(&sha256);
SHA256_Update(&sha256, str.c_str(), str.size());
SHA256_Final(hash, &sha256);
std::stringstream ss;
for (int i = 0; i < SHA256_DIGEST_LENGTH; i++) {
ss << std::hex << std::setw(2) << std::setfill('0') << (int)hash[i];
}
return ss.str();
}
std::string hmac_sha256_hex(std::string key, std::string msg) {
unsigned char hash[32];
HMAC_CTX* hmac = HMAC_CTX_new();
HMAC_Init_ex(hmac, &key[0], key.length(), EVP_sha256(), NULL);
HMAC_Update(hmac, (unsigned char*)&msg[0], msg.length());
unsigned int len = 32;
HMAC_Final(hmac, hash, &len);
HMAC_CTX_free(hmac);
std::stringstream ss;
ss << std::hex << std::setfill('0');
for (int i = 0; i < len; i++) {
ss << std::hex << std::setw(2) << (unsigned int)hash[i];
}
return (ss.str());
}
std::string hmac_sha256(std::string key, std::string msg) {
unsigned char hash[32];
HMAC_CTX* hmac = HMAC_CTX_new();
HMAC_Init_ex(hmac, &key[0], key.length(), EVP_sha256(), NULL);
HMAC_Update(hmac, (unsigned char*)&msg[0], msg.length());
unsigned int len = 32;
HMAC_Final(hmac, hash, &len);
HMAC_CTX_free(hmac);
std::stringstream ss;
ss << std::setfill('0');
for (int i = 0; i < len; i++) {
ss << hash[i];
}
return (ss.str());
}
// Date and Time parameters are used for unit testing
void S3BlobStoreEndpoint::setV4AuthHeaders(std::string const& verb,
std::string const& resource,
HTTP::Headers& headers,
std::string date,
std::string datestamp) {
if (!credentials.present()) {
return;
}
Credentials creds = credentials.get();
// std::cout << "========== Starting===========" << std::endl;
std::string accessKey = creds.key;
std::string secretKey = creds.secret;
// Create a date for headers and the credential string
std::string amzDate;
std::string dateStamp;
if (date.empty() || datestamp.empty()) {
time_t ts;
time(&ts);
char dateBuf[20];
// ISO 8601 format YYYYMMDD'T'HHMMSS'Z'
strftime(dateBuf, 20, "%Y%m%dT%H%M%SZ", gmtime(&ts));
amzDate = dateBuf;
strftime(dateBuf, 20, "%Y%m%d", gmtime(&ts));
dateStamp = dateBuf;
} else {
amzDate = date;
dateStamp = datestamp;
}
// ************* TASK 1: CREATE A CANONICAL REQUEST *************
// Create Create canonical URI--the part of the URI from domain to query string (use '/' if no path)
std::vector<std::string> queryParameters;
std::string canonicalURI = awsCanonicalURI(resource, queryParameters, true);
std::string canonicalQueryString;
if (!queryParameters.empty()) {
std::sort(queryParameters.begin(), queryParameters.end());
canonicalQueryString = boost::algorithm::join(queryParameters, "&");
}
using namespace boost::algorithm;
// Create the canonical headers and signed headers
ASSERT(!headers["Host"].empty());
// Using unsigned payload here and adding content-md5 to the signed headers. It may be better to also include sha256
// sum for added security.
headers["x-amz-content-sha256"] = "UNSIGNED-PAYLOAD";
headers["x-amz-date"] = amzDate;
std::vector<std::pair<std::string, std::string>> headersList;
headersList.push_back({ "host", trim_copy(headers["Host"]) + "\n" });
if (headers.find("Content-Type") != headers.end())
headersList.push_back({ "content-type", trim_copy(headers["Content-Type"]) + "\n" });
if (headers.find("Content-MD5") != headers.end())
headersList.push_back({ "content-md5", trim_copy(headers["Content-MD5"]) + "\n" });
for (auto h : headers) {
if (StringRef(h.first).startsWith(LiteralStringRef("x-amz")))
headersList.push_back({ to_lower_copy(h.first), trim_copy(h.second) + "\n" });
}
std::sort(headersList.begin(), headersList.end());
std::string canonicalHeaders;
std::string signedHeaders;
for (auto& i : headersList) {
canonicalHeaders += i.first + ":" + i.second;
signedHeaders += i.first + ";";
}
signedHeaders.pop_back();
std::string canonicalRequest = verb + "\n" + canonicalURI + "\n" + canonicalQueryString + "\n" + canonicalHeaders +
"\n" + signedHeaders + "\n" + headers["x-amz-content-sha256"];
// ************* TASK 2: CREATE THE STRING TO SIGN*************
std::string algorithm = "AWS4-HMAC-SHA256";
std::string credentialScope = dateStamp + "/" + region + "/s3/" + "aws4_request";
std::string stringToSign =
algorithm + "\n" + amzDate + "\n" + credentialScope + "\n" + sha256_hex(canonicalRequest);
// ************* TASK 3: CALCULATE THE SIGNATURE *************
// Create the signing key using the function defined above.
std::string signingKey =
hmac_sha256(hmac_sha256(hmac_sha256(hmac_sha256("AWS4" + secretKey, dateStamp), region), "s3"), "aws4_request");
// Sign the string_to_sign using the signing_key
std::string signature = hmac_sha256_hex(signingKey, stringToSign);
// ************* TASK 4: ADD SIGNING INFORMATION TO THE Header *************
std::string authorizationHeader = algorithm + " " + "Credential=" + accessKey + "/" + credentialScope + ", " +
"SignedHeaders=" + signedHeaders + ", " + "Signature=" + signature;
headers["Authorization"] = authorizationHeader;
}
void S3BlobStoreEndpoint::setAuthHeaders(std::string const& verb, std::string const& resource, HTTP::Headers& headers) {
if (!credentials.present()) {
return;
}
Credentials creds = credentials.get();
std::string& date = headers["Date"];
char dateBuf[64];
time_t ts;
time(&ts);
strftime(dateBuf, 64, "%a, %d %b %Y %H:%M:%S GMT", gmtime(&ts));
date = dateBuf;
std::string msg;
msg.append(verb);
msg.append("\n");
auto contentMD5 = headers.find("Content-MD5");
if (contentMD5 != headers.end())
msg.append(contentMD5->second);
msg.append("\n");
auto contentType = headers.find("Content-Type");
if (contentType != headers.end())
msg.append(contentType->second);
msg.append("\n");
msg.append(date);
msg.append("\n");
for (auto h : headers) {
StringRef name = h.first;
if (name.startsWith(LiteralStringRef("x-amz")) || name.startsWith(LiteralStringRef("x-icloud"))) {
msg.append(h.first);
msg.append(":");
msg.append(h.second);
msg.append("\n");
}
}
msg.append(resource);
if (verb == "GET") {
size_t q = resource.find_last_of('?');
if (q != resource.npos)
msg.resize(msg.size() - (resource.size() - q));
}
std::string sig = base64::encoder::from_string(hmac_sha1(creds, msg));
// base64 encoded blocks end in \n so remove it.
sig.resize(sig.size() - 1);
std::string auth = "AWS ";
auth.append(creds.key);
auth.append(":");
auth.append(sig);
headers["Authorization"] = auth;
}
ACTOR Future<std::string> readEntireFile_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object) {
wait(bstore->requestRateRead->getAllowance(1));
std::string resource = constructResourcePath(bstore, bucket, object);
HTTP::Headers headers;
Reference<HTTP::Response> r = wait(bstore->doRequest("GET", resource, headers, nullptr, 0, { 200, 404 }));
if (r->code == 404)
throw file_not_found();
return r->content;
}
Future<std::string> S3BlobStoreEndpoint::readEntireFile(std::string const& bucket, std::string const& object) {
return readEntireFile_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object);
}
ACTOR Future<Void> writeEntireFileFromBuffer_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object,
UnsentPacketQueue* pContent,
int contentLen,
std::string contentMD5) {
if (contentLen > bstore->knobs.multipart_max_part_size)
throw file_too_large();
wait(bstore->requestRateWrite->getAllowance(1));
wait(bstore->concurrentUploads.take());
state FlowLock::Releaser uploadReleaser(bstore->concurrentUploads, 1);
std::string resource = constructResourcePath(bstore, bucket, object);
HTTP::Headers headers;
// Send MD5 sum for content so blobstore can verify it
headers["Content-MD5"] = contentMD5;
if (!CLIENT_KNOBS->BLOBSTORE_ENCRYPTION_TYPE.empty())
headers["x-amz-server-side-encryption"] = CLIENT_KNOBS->BLOBSTORE_ENCRYPTION_TYPE;
state Reference<HTTP::Response> r =
wait(bstore->doRequest("PUT", resource, headers, pContent, contentLen, { 200 }));
// For uploads, Blobstore returns an MD5 sum of uploaded content so check it.
if (!r->verifyMD5(false, contentMD5))
throw checksum_failed();
return Void();
}
ACTOR Future<Void> writeEntireFile_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object,
std::string content) {
state UnsentPacketQueue packets;
PacketWriter pw(packets.getWriteBuffer(content.size()), nullptr, Unversioned());
pw.serializeBytes(content);
if (content.size() > bstore->knobs.multipart_max_part_size)
throw file_too_large();
// Yield because we may have just had to copy several MB's into packet buffer chain and next we have to calculate an
// MD5 sum of it.
// TODO: If this actor is used to send large files then combine the summing and packetization into a loop with a
// yield() every 20k or so.
wait(yield());
MD5_CTX sum;
::MD5_Init(&sum);
::MD5_Update(&sum, content.data(), content.size());
std::string sumBytes;
sumBytes.resize(16);
::MD5_Final((unsigned char*)sumBytes.data(), &sum);
std::string contentMD5 = base64::encoder::from_string(sumBytes);
contentMD5.resize(contentMD5.size() - 1);
wait(writeEntireFileFromBuffer_impl(bstore, bucket, object, &packets, content.size(), contentMD5));
return Void();
}
Future<Void> S3BlobStoreEndpoint::writeEntireFile(std::string const& bucket,
std::string const& object,
std::string const& content) {
return writeEntireFile_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object, content);
}
Future<Void> S3BlobStoreEndpoint::writeEntireFileFromBuffer(std::string const& bucket,
std::string const& object,
UnsentPacketQueue* pContent,
int contentLen,
std::string const& contentMD5) {
return writeEntireFileFromBuffer_impl(
Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object, pContent, contentLen, contentMD5);
}
ACTOR Future<int> readObject_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object,
void* data,
int length,
int64_t offset) {
if (length <= 0)
return 0;
wait(bstore->requestRateRead->getAllowance(1));
std::string resource = constructResourcePath(bstore, bucket, object);
HTTP::Headers headers;
headers["Range"] = format("bytes=%lld-%lld", offset, offset + length - 1);
Reference<HTTP::Response> r = wait(bstore->doRequest("GET", resource, headers, nullptr, 0, { 200, 206, 404 }));
if (r->code == 404)
throw file_not_found();
if (r->contentLen !=
r->content.size()) // Double check that this wasn't a header-only response, probably unnecessary
throw io_error();
// Copy the output bytes, server could have sent more or less bytes than requested so copy at most length bytes
memcpy(data, r->content.data(), std::min<int64_t>(r->contentLen, length));
return r->contentLen;
}
Future<int> S3BlobStoreEndpoint::readObject(std::string const& bucket,
std::string const& object,
void* data,
int length,
int64_t offset) {
return readObject_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object, data, length, offset);
}
ACTOR static Future<std::string> beginMultiPartUpload_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object) {
wait(bstore->requestRateWrite->getAllowance(1));
std::string resource = constructResourcePath(bstore, bucket, object);
resource += "?uploads";
HTTP::Headers headers;
if (!CLIENT_KNOBS->BLOBSTORE_ENCRYPTION_TYPE.empty())
headers["x-amz-server-side-encryption"] = CLIENT_KNOBS->BLOBSTORE_ENCRYPTION_TYPE;
Reference<HTTP::Response> r = wait(bstore->doRequest("POST", resource, headers, nullptr, 0, { 200 }));
try {
xml_document<> doc;
// Copy content because rapidxml will modify it during parse
std::string content = r->content;
doc.parse<0>((char*)content.c_str());
// There should be exactly one node
xml_node<>* result = doc.first_node();
if (result != nullptr && strcmp(result->name(), "InitiateMultipartUploadResult") == 0) {
xml_node<>* id = result->first_node("UploadId");
if (id != nullptr) {
return id->value();
}
}
} catch (...) {
}
throw http_bad_response();
}
Future<std::string> S3BlobStoreEndpoint::beginMultiPartUpload(std::string const& bucket, std::string const& object) {
return beginMultiPartUpload_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object);
}
ACTOR Future<std::string> uploadPart_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object,
std::string uploadID,
unsigned int partNumber,
UnsentPacketQueue* pContent,
int contentLen,
std::string contentMD5) {
wait(bstore->requestRateWrite->getAllowance(1));
wait(bstore->concurrentUploads.take());
state FlowLock::Releaser uploadReleaser(bstore->concurrentUploads, 1);
std::string resource = constructResourcePath(bstore, bucket, object);
resource += format("?partNumber=%d&uploadId=%s", partNumber, uploadID.c_str());
HTTP::Headers headers;
// Send MD5 sum for content so blobstore can verify it
headers["Content-MD5"] = contentMD5;
state Reference<HTTP::Response> r =
wait(bstore->doRequest("PUT", resource, headers, pContent, contentLen, { 200 }));
// TODO: In the event that the client times out just before the request completes (so the client is unaware) then
// the next retry will see error 400. That could be detected and handled gracefully by retrieving the etag for the
// successful request.
// For uploads, Blobstore returns an MD5 sum of uploaded content so check it.
if (!r->verifyMD5(false, contentMD5))
throw checksum_failed();
// No etag -> bad response.
std::string etag = r->headers["ETag"];
if (etag.empty())
throw http_bad_response();
return etag;
}
Future<std::string> S3BlobStoreEndpoint::uploadPart(std::string const& bucket,
std::string const& object,
std::string const& uploadID,
unsigned int partNumber,
UnsentPacketQueue* pContent,
int contentLen,
std::string const& contentMD5) {
return uploadPart_impl(Reference<S3BlobStoreEndpoint>::addRef(this),
bucket,
object,
uploadID,
partNumber,
pContent,
contentLen,
contentMD5);
}
ACTOR Future<Void> finishMultiPartUpload_impl(Reference<S3BlobStoreEndpoint> bstore,
std::string bucket,
std::string object,
std::string uploadID,
S3BlobStoreEndpoint::MultiPartSetT parts) {
state UnsentPacketQueue part_list; // NonCopyable state var so must be declared at top of actor
wait(bstore->requestRateWrite->getAllowance(1));
std::string manifest = "<CompleteMultipartUpload>";
for (auto& p : parts)
manifest += format("<Part><PartNumber>%d</PartNumber><ETag>%s</ETag></Part>\n", p.first, p.second.c_str());
manifest += "</CompleteMultipartUpload>";
std::string resource = constructResourcePath(bstore, bucket, object);
resource += format("?uploadId=%s", uploadID.c_str());
HTTP::Headers headers;
PacketWriter pw(part_list.getWriteBuffer(manifest.size()), nullptr, Unversioned());
pw.serializeBytes(manifest);
Reference<HTTP::Response> r =
wait(bstore->doRequest("POST", resource, headers, &part_list, manifest.size(), { 200 }));
// TODO: In the event that the client times out just before the request completes (so the client is unaware) then
// the next retry will see error 400. That could be detected and handled gracefully by HEAD'ing the object before
// upload to get its (possibly nonexistent) eTag, then if an error 400 is seen then retrieve the eTag again and if
// it has changed then consider the finish complete.
return Void();
}
Future<Void> S3BlobStoreEndpoint::finishMultiPartUpload(std::string const& bucket,
std::string const& object,
std::string const& uploadID,
MultiPartSetT const& parts) {
return finishMultiPartUpload_impl(Reference<S3BlobStoreEndpoint>::addRef(this), bucket, object, uploadID, parts);
}
TEST_CASE("/backup/s3/v4headers") {
S3BlobStoreEndpoint::Credentials creds{ "AKIAIOSFODNN7EXAMPLE", "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY", "" }
// GET without query parameters
{
S3BlobStoreEndpoint s3("s3.amazonaws.com", "443", "amazonaws", "proxy", "port", creds);
std::string verb("GET");
std::string resource("/test.txt");
HTTP::Headers headers;
headers["Host"] = "s3.amazonaws.com";
s3.setV4AuthHeaders(verb, resource, headers, "20130524T000000Z", "20130524");
ASSERT(headers["Authorization"] ==
"AWS4-HMAC-SHA256 Credential=AKIAIOSFODNN7EXAMPLE/20130524/amazonaws/s3/aws4_request, "
"SignedHeaders=host;x-amz-content-sha256;x-amz-date, "
"Signature=c6037f4b174f2019d02d7085a611cef8adfe1efe583e220954dc85d59cd31ba3");
ASSERT(headers["x-amz-date"] == "20130524T000000Z");
}
// GET with query parameters
{
S3BlobStoreEndpoint s3("s3.amazonaws.com", "443", "amazonaws", "proxy", "port", creds);
std::string verb("GET");
std::string resource("/test/examplebucket?Action=DescribeRegions&Version=2013-10-15");
HTTP::Headers headers;
headers["Host"] = "s3.amazonaws.com";
s3.setV4AuthHeaders(verb, resource, headers, "20130524T000000Z", "20130524");
ASSERT(headers["Authorization"] ==
"AWS4-HMAC-SHA256 Credential=AKIAIOSFODNN7EXAMPLE/20130524/amazonaws/s3/aws4_request, "
"SignedHeaders=host;x-amz-content-sha256;x-amz-date, "
"Signature=426f04e71e191fbc30096c306fe1b11ce8f026a7be374541862bbee320cce71c");
ASSERT(headers["x-amz-date"] == "20130524T000000Z");
}
// POST
{
S3BlobStoreEndpoint s3("s3.us-west-2.amazonaws.com", "443", "us-west-2", "proxy", "port", creds);
std::string verb("POST");
std::string resource("/simple.json");
HTTP::Headers headers;
headers["Host"] = "s3.us-west-2.amazonaws.com";
headers["Content-Type"] = "Application/x-amz-json-1.0";
s3.setV4AuthHeaders(verb, resource, headers, "20130524T000000Z", "20130524");
ASSERT(headers["Authorization"] ==
"AWS4-HMAC-SHA256 Credential=AKIAIOSFODNN7EXAMPLE/20130524/us-west-2/s3/aws4_request, "
"SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date, "
"Signature=cf095e36bed9cd3139c2e8b3e20c296a79d8540987711bf3a0d816b19ae00314");
ASSERT(headers["x-amz-date"] == "20130524T000000Z");
ASSERT(headers["Host"] == "s3.us-west-2.amazonaws.com");
ASSERT(headers["Content-Type"] == "Application/x-amz-json-1.0");
}
return Void();
}
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