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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "OCSPRequestor.h"
#include <limits>
#include "ScopedNSSTypes.h"
#include "mozilla/Base64.h"
#include "mozilla/Casting.h"
#include "nsIURLParser.h"
#include "nsNSSCallbacks.h"
#include "nsNetCID.h"
#include "nsServiceManagerUtils.h"
#include "secerr.h"
extern mozilla::LazyLogModule gCertVerifierLog;
namespace mozilla {
void
ReleaseHttpServerSession(nsNSSHttpServerSession* httpServerSession)
{
delete httpServerSession;
}
void
ReleaseHttpRequestSession(nsNSSHttpRequestSession* httpRequestSession)
{
httpRequestSession->Release();
}
MOZ_TYPE_SPECIFIC_UNIQUE_PTR_TEMPLATE(UniqueHTTPServerSession,
nsNSSHttpServerSession,
ReleaseHttpServerSession)
MOZ_TYPE_SPECIFIC_UNIQUE_PTR_TEMPLATE(UniqueHTTPRequestSession,
nsNSSHttpRequestSession,
ReleaseHttpRequestSession)
} // namespace mozilla
namespace mozilla { namespace psm {
static nsresult
AppendEscapedBase64Item(const SECItem* encodedRequest, nsACString& path)
{
nsresult rv;
nsDependentCSubstring requestAsSubstring(
BitwiseCast<char*, unsigned char*>(encodedRequest->data),
encodedRequest->len);
nsCString base64Request;
rv = Base64Encode(requestAsSubstring, base64Request);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
MOZ_LOG(gCertVerifierLog, LogLevel::Debug,
("Setting up OCSP GET path, pre path =%s\n",
PromiseFlatCString(path).get()));
// The path transformation is not a direct url encoding. Three characters
// need change '+' -> "%2B", '/' -> "%2F", and '=' -> '%3D'.
// http://tools.ietf.org/html/rfc5019#section-5
base64Request.ReplaceSubstring("+", "%2B");
base64Request.ReplaceSubstring("/", "%2F");
base64Request.ReplaceSubstring("=", "%3D");
path.Append(base64Request);
return NS_OK;
}
Result
DoOCSPRequest(const UniquePLArenaPool& arena, const char* url,
const NeckoOriginAttributes& originAttributes,
const SECItem* encodedRequest, PRIntervalTime timeout,
bool useGET,
/*out*/ SECItem*& encodedResponse)
{
MOZ_ASSERT(arena.get());
MOZ_ASSERT(url);
MOZ_ASSERT(encodedRequest);
MOZ_ASSERT(encodedRequest->data);
if (!arena.get() || !url || !encodedRequest || !encodedRequest->data) {
return Result::FATAL_ERROR_INVALID_ARGS;
}
uint32_t urlLen = PL_strlen(url);
if (urlLen > static_cast<uint32_t>(std::numeric_limits<int32_t>::max())) {
return Result::FATAL_ERROR_INVALID_ARGS;
}
nsCOMPtr<nsIURLParser> urlParser = do_GetService(NS_STDURLPARSER_CONTRACTID);
if (!urlParser) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
uint32_t schemePos;
int32_t schemeLen;
uint32_t authorityPos;
int32_t authorityLen;
uint32_t pathPos;
int32_t pathLen;
nsresult nsrv = urlParser->ParseURL(url, static_cast<int32_t>(urlLen),
&schemePos, &schemeLen,
&authorityPos, &authorityLen,
&pathPos, &pathLen);
if (NS_FAILED(nsrv)) {
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
if (schemeLen < 0 || authorityLen < 0) {
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
nsAutoCString scheme(url + schemePos,
static_cast<nsAutoCString::size_type>(schemeLen));
if (!scheme.LowerCaseEqualsLiteral("http")) {
// We don't support HTTPS to avoid loops. See Bug 92923.
// We also in general only support HTTP.
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
uint32_t hostnamePos;
int32_t hostnameLen;
int32_t port;
// We ignore user:password sections: if one is present, we send an OCSP
// request to the URL as normal without sending the username or password.
nsrv = urlParser->ParseAuthority(url + authorityPos, authorityLen,
nullptr, nullptr, nullptr, nullptr,
&hostnamePos, &hostnameLen, &port);
if (NS_FAILED(nsrv)) {
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
if (hostnameLen < 0) {
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
if (port == -1) {
port = 80;
} else if (port < 0 || port > 0xffff) {
return Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
nsAutoCString
hostname(url + authorityPos + hostnamePos,
static_cast<nsACString_internal::size_type>(hostnameLen));
nsNSSHttpServerSession* serverSessionPtr = nullptr;
Result rv = nsNSSHttpInterface::createSessionFcn(
hostname.BeginReading(), static_cast<uint16_t>(port), &serverSessionPtr);
if (rv != Success) {
return rv;
}
UniqueHTTPServerSession serverSession(serverSessionPtr);
nsAutoCString path;
if (pathLen > 0) {
path.Assign(url + pathPos, static_cast<nsAutoCString::size_type>(pathLen));
} else {
path.Assign("/");
}
MOZ_LOG(gCertVerifierLog, LogLevel::Debug,
("Setting up OCSP request: pre all path =%s pathlen=%d\n", path.get(),
pathLen));
nsAutoCString method("POST");
if (useGET) {
method.Assign("GET");
if (!StringEndsWith(path, NS_LITERAL_CSTRING("/"))) {
path.Append("/");
}
nsresult nsrv = AppendEscapedBase64Item(encodedRequest, path);
if (NS_WARN_IF(NS_FAILED(nsrv))) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
}
nsNSSHttpRequestSession* requestSessionPtr;
rv = nsNSSHttpInterface::createFcn(serverSession.get(), "http", path.get(),
method.get(), originAttributes, timeout,
&requestSessionPtr);
if (rv != Success) {
return rv;
}
UniqueHTTPRequestSession requestSession(requestSessionPtr);
if (!useGET) {
rv = nsNSSHttpInterface::setPostDataFcn(
requestSession.get(),
BitwiseCast<char*, unsigned char*>(encodedRequest->data),
encodedRequest->len, "application/ocsp-request");
if (rv != Success) {
return rv;
}
}
uint16_t httpResponseCode;
const char* httpResponseData;
uint32_t httpResponseDataLen = 0; // 0 means any response size is acceptable
rv = nsNSSHttpInterface::trySendAndReceiveFcn(requestSession.get(), nullptr,
&httpResponseCode, nullptr,
nullptr, &httpResponseData,
&httpResponseDataLen);
if (rv != Success) {
return rv;
}
if (httpResponseCode != 200) {
return Result::ERROR_OCSP_SERVER_ERROR;
}
encodedResponse = SECITEM_AllocItem(arena.get(), nullptr, httpResponseDataLen);
if (!encodedResponse) {
return Result::FATAL_ERROR_NO_MEMORY;
}
memcpy(encodedResponse->data, httpResponseData, httpResponseDataLen);
return Success;
}
} } // namespace mozilla::psm
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