Revert of Removing HTTPS and SOCKS proxy server code. (patchset #2 id:20001 of https://codereview.webrtc.org/2731673002/ )
Also needed to revert these CLs, which removed code used by the
code being un-removed:
https://codereview.webrtc.org/2745523004
https://codereview.webrtc.org/2754033003
https://codereview.webrtc.org/2758943002
Reason for revert:
This code is still being used by native application developers, so we should send a PSA announcing the deprecation and suggest an alternative before removing it.
Original issue's description:
> Removing HTTPS and SOCKS proxy server code.
>
> This isn't used any more so there's no point in maintaining it.
>
> BUG=None
>
> Review-Url: https://codereview.webrtc.org/2731673002
> Cr-Commit-Position: refs/heads/master@{#17016}
> Committed: https://chromium.googlesource.com/external/webrtc/+/a1991c517598fda9c9c0cf8876886e3968436ff9
TBR=pthatcher@webrtc.org
NOPRESUBMIT=true
NOTRY=true
BUG=None
Review-Url: https://codereview.webrtc.org/2766063005
Cr-Commit-Position: refs/heads/master@{#17369}
diff --git a/webrtc/base/httpcommon.cc b/webrtc/base/httpcommon.cc
new file mode 100644
index 0000000..031505b
--- /dev/null
+++ b/webrtc/base/httpcommon.cc
@@ -0,0 +1,1009 @@
+/*
+ * Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <time.h>
+
+#if defined(WEBRTC_WIN)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#define SECURITY_WIN32
+#include <security.h>
+#endif
+
+#include <algorithm>
+
+#include "webrtc/base/arraysize.h"
+#include "webrtc/base/base64.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/base/cryptstring.h"
+#include "webrtc/base/httpcommon-inl.h"
+#include "webrtc/base/httpcommon.h"
+#include "webrtc/base/messagedigest.h"
+#include "webrtc/base/socketaddress.h"
+#include "webrtc/base/stringencode.h"
+#include "webrtc/base/stringutils.h"
+
+namespace rtc {
+
+#if defined(WEBRTC_WIN)
+extern const ConstantLabel SECURITY_ERRORS[];
+#endif
+
+//////////////////////////////////////////////////////////////////////
+// Enum - TODO: expose globally later?
+//////////////////////////////////////////////////////////////////////
+
+bool find_string(size_t& index, const std::string& needle,
+ const char* const haystack[], size_t max_index) {
+ for (index=0; index<max_index; ++index) {
+ if (_stricmp(needle.c_str(), haystack[index]) == 0) {
+ return true;
+ }
+ }
+ return false;
+}
+
+template<class E>
+struct Enum {
+ static const char** Names;
+ static size_t Size;
+
+ static inline const char* Name(E val) { return Names[val]; }
+ static inline bool Parse(E& val, const std::string& name) {
+ size_t index;
+ if (!find_string(index, name, Names, Size))
+ return false;
+ val = static_cast<E>(index);
+ return true;
+ }
+
+ E val;
+
+ inline operator E&() { return val; }
+ inline Enum& operator=(E rhs) { val = rhs; return *this; }
+
+ inline const char* name() const { return Name(val); }
+ inline bool assign(const std::string& name) { return Parse(val, name); }
+ inline Enum& operator=(const std::string& rhs) { assign(rhs); return *this; }
+};
+
+#define ENUM(e,n) \
+ template<> const char** Enum<e>::Names = n; \
+ template<> size_t Enum<e>::Size = sizeof(n)/sizeof(n[0])
+
+//////////////////////////////////////////////////////////////////////
+// HttpCommon
+//////////////////////////////////////////////////////////////////////
+
+static const char* kHttpVersions[HVER_LAST+1] = {
+ "1.0", "1.1", "Unknown"
+};
+ENUM(HttpVersion, kHttpVersions);
+
+static const char* kHttpVerbs[HV_LAST+1] = {
+ "GET", "POST", "PUT", "DELETE", "CONNECT", "HEAD"
+};
+ENUM(HttpVerb, kHttpVerbs);
+
+static const char* kHttpHeaders[HH_LAST+1] = {
+ "Age",
+ "Cache-Control",
+ "Connection",
+ "Content-Disposition",
+ "Content-Length",
+ "Content-Range",
+ "Content-Type",
+ "Cookie",
+ "Date",
+ "ETag",
+ "Expires",
+ "Host",
+ "If-Modified-Since",
+ "If-None-Match",
+ "Keep-Alive",
+ "Last-Modified",
+ "Location",
+ "Proxy-Authenticate",
+ "Proxy-Authorization",
+ "Proxy-Connection",
+ "Range",
+ "Set-Cookie",
+ "TE",
+ "Trailers",
+ "Transfer-Encoding",
+ "Upgrade",
+ "User-Agent",
+ "WWW-Authenticate",
+};
+ENUM(HttpHeader, kHttpHeaders);
+
+const char* ToString(HttpVersion version) {
+ return Enum<HttpVersion>::Name(version);
+}
+
+bool FromString(HttpVersion& version, const std::string& str) {
+ return Enum<HttpVersion>::Parse(version, str);
+}
+
+const char* ToString(HttpVerb verb) {
+ return Enum<HttpVerb>::Name(verb);
+}
+
+bool FromString(HttpVerb& verb, const std::string& str) {
+ return Enum<HttpVerb>::Parse(verb, str);
+}
+
+const char* ToString(HttpHeader header) {
+ return Enum<HttpHeader>::Name(header);
+}
+
+bool FromString(HttpHeader& header, const std::string& str) {
+ return Enum<HttpHeader>::Parse(header, str);
+}
+
+bool HttpCodeHasBody(uint32_t code) {
+ return !HttpCodeIsInformational(code)
+ && (code != HC_NO_CONTENT) && (code != HC_NOT_MODIFIED);
+}
+
+bool HttpCodeIsCacheable(uint32_t code) {
+ switch (code) {
+ case HC_OK:
+ case HC_NON_AUTHORITATIVE:
+ case HC_PARTIAL_CONTENT:
+ case HC_MULTIPLE_CHOICES:
+ case HC_MOVED_PERMANENTLY:
+ case HC_GONE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool HttpHeaderIsEndToEnd(HttpHeader header) {
+ switch (header) {
+ case HH_CONNECTION:
+ case HH_KEEP_ALIVE:
+ case HH_PROXY_AUTHENTICATE:
+ case HH_PROXY_AUTHORIZATION:
+ case HH_PROXY_CONNECTION: // Note part of RFC... this is non-standard header
+ case HH_TE:
+ case HH_TRAILERS:
+ case HH_TRANSFER_ENCODING:
+ case HH_UPGRADE:
+ return false;
+ default:
+ return true;
+ }
+}
+
+bool HttpHeaderIsCollapsible(HttpHeader header) {
+ switch (header) {
+ case HH_SET_COOKIE:
+ case HH_PROXY_AUTHENTICATE:
+ case HH_WWW_AUTHENTICATE:
+ return false;
+ default:
+ return true;
+ }
+}
+
+bool HttpShouldKeepAlive(const HttpData& data) {
+ std::string connection;
+ if ((data.hasHeader(HH_PROXY_CONNECTION, &connection)
+ || data.hasHeader(HH_CONNECTION, &connection))) {
+ return (_stricmp(connection.c_str(), "Keep-Alive") == 0);
+ }
+ return (data.version >= HVER_1_1);
+}
+
+namespace {
+
+inline bool IsEndOfAttributeName(size_t pos, size_t len, const char * data) {
+ if (pos >= len)
+ return true;
+ if (isspace(static_cast<unsigned char>(data[pos])))
+ return true;
+ // The reason for this complexity is that some attributes may contain trailing
+ // equal signs (like base64 tokens in Negotiate auth headers)
+ if ((pos+1 < len) && (data[pos] == '=') &&
+ !isspace(static_cast<unsigned char>(data[pos+1])) &&
+ (data[pos+1] != '=')) {
+ return true;
+ }
+ return false;
+}
+
+// TODO: unittest for EscapeAttribute and HttpComposeAttributes.
+
+std::string EscapeAttribute(const std::string& attribute) {
+ const size_t kMaxLength = attribute.length() * 2 + 1;
+ char* buffer = STACK_ARRAY(char, kMaxLength);
+ size_t len = escape(buffer, kMaxLength, attribute.data(), attribute.length(),
+ "\"", '\\');
+ return std::string(buffer, len);
+}
+
+} // anonymous namespace
+
+void HttpComposeAttributes(const HttpAttributeList& attributes, char separator,
+ std::string* composed) {
+ std::stringstream ss;
+ for (size_t i=0; i<attributes.size(); ++i) {
+ if (i > 0) {
+ ss << separator << " ";
+ }
+ ss << attributes[i].first;
+ if (!attributes[i].second.empty()) {
+ ss << "=\"" << EscapeAttribute(attributes[i].second) << "\"";
+ }
+ }
+ *composed = ss.str();
+}
+
+void HttpParseAttributes(const char * data, size_t len,
+ HttpAttributeList& attributes) {
+ size_t pos = 0;
+ while (true) {
+ // Skip leading whitespace
+ while ((pos < len) && isspace(static_cast<unsigned char>(data[pos]))) {
+ ++pos;
+ }
+
+ // End of attributes?
+ if (pos >= len)
+ return;
+
+ // Find end of attribute name
+ size_t start = pos;
+ while (!IsEndOfAttributeName(pos, len, data)) {
+ ++pos;
+ }
+
+ HttpAttribute attribute;
+ attribute.first.assign(data + start, data + pos);
+
+ // Attribute has value?
+ if ((pos < len) && (data[pos] == '=')) {
+ ++pos; // Skip '='
+ // Check if quoted value
+ if ((pos < len) && (data[pos] == '"')) {
+ while (++pos < len) {
+ if (data[pos] == '"') {
+ ++pos;
+ break;
+ }
+ if ((data[pos] == '\\') && (pos + 1 < len))
+ ++pos;
+ attribute.second.append(1, data[pos]);
+ }
+ } else {
+ while ((pos < len) &&
+ !isspace(static_cast<unsigned char>(data[pos])) &&
+ (data[pos] != ',')) {
+ attribute.second.append(1, data[pos++]);
+ }
+ }
+ }
+
+ attributes.push_back(attribute);
+ if ((pos < len) && (data[pos] == ',')) ++pos; // Skip ','
+ }
+}
+
+bool HttpHasAttribute(const HttpAttributeList& attributes,
+ const std::string& name,
+ std::string* value) {
+ for (HttpAttributeList::const_iterator it = attributes.begin();
+ it != attributes.end(); ++it) {
+ if (it->first == name) {
+ if (value) {
+ *value = it->second;
+ }
+ return true;
+ }
+ }
+ return false;
+}
+
+bool HttpHasNthAttribute(HttpAttributeList& attributes,
+ size_t index,
+ std::string* name,
+ std::string* value) {
+ if (index >= attributes.size())
+ return false;
+
+ if (name)
+ *name = attributes[index].first;
+ if (value)
+ *value = attributes[index].second;
+ return true;
+}
+
+bool HttpDateToSeconds(const std::string& date, time_t* seconds) {
+ const char* const kTimeZones[] = {
+ "UT", "GMT", "EST", "EDT", "CST", "CDT", "MST", "MDT", "PST", "PDT",
+ "A", "B", "C", "D", "E", "F", "G", "H", "I", "K", "L", "M",
+ "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y"
+ };
+ const int kTimeZoneOffsets[] = {
+ 0, 0, -5, -4, -6, -5, -7, -6, -8, -7,
+ -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12,
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
+ };
+
+ RTC_DCHECK(nullptr != seconds);
+ struct tm tval;
+ memset(&tval, 0, sizeof(tval));
+ char month[4], zone[6];
+ memset(month, 0, sizeof(month));
+ memset(zone, 0, sizeof(zone));
+
+ if (7 != sscanf(date.c_str(), "%*3s, %d %3s %d %d:%d:%d %5c",
+ &tval.tm_mday, month, &tval.tm_year,
+ &tval.tm_hour, &tval.tm_min, &tval.tm_sec, zone)) {
+ return false;
+ }
+ switch (toupper(month[2])) {
+ case 'N': tval.tm_mon = (month[1] == 'A') ? 0 : 5; break;
+ case 'B': tval.tm_mon = 1; break;
+ case 'R': tval.tm_mon = (month[0] == 'M') ? 2 : 3; break;
+ case 'Y': tval.tm_mon = 4; break;
+ case 'L': tval.tm_mon = 6; break;
+ case 'G': tval.tm_mon = 7; break;
+ case 'P': tval.tm_mon = 8; break;
+ case 'T': tval.tm_mon = 9; break;
+ case 'V': tval.tm_mon = 10; break;
+ case 'C': tval.tm_mon = 11; break;
+ }
+ tval.tm_year -= 1900;
+ time_t gmt, non_gmt = mktime(&tval);
+ if ((zone[0] == '+') || (zone[0] == '-')) {
+ if (!isdigit(zone[1]) || !isdigit(zone[2])
+ || !isdigit(zone[3]) || !isdigit(zone[4])) {
+ return false;
+ }
+ int hours = (zone[1] - '0') * 10 + (zone[2] - '0');
+ int minutes = (zone[3] - '0') * 10 + (zone[4] - '0');
+ int offset = (hours * 60 + minutes) * 60;
+ gmt = non_gmt + ((zone[0] == '+') ? offset : -offset);
+ } else {
+ size_t zindex;
+ if (!find_string(zindex, zone, kTimeZones, arraysize(kTimeZones))) {
+ return false;
+ }
+ gmt = non_gmt + kTimeZoneOffsets[zindex] * 60 * 60;
+ }
+ // TODO: Android should support timezone, see b/2441195
+#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) || defined(WEBRTC_ANDROID) || defined(BSD)
+ tm *tm_for_timezone = localtime(&gmt);
+ *seconds = gmt + tm_for_timezone->tm_gmtoff;
+#else
+#if defined(_MSC_VER) && _MSC_VER >= 1900
+ long timezone = 0;
+ _get_timezone(&timezone);
+#endif
+ *seconds = gmt - timezone;
+#endif
+ return true;
+}
+
+std::string HttpAddress(const SocketAddress& address, bool secure) {
+ return (address.port() == HttpDefaultPort(secure))
+ ? address.hostname() : address.ToString();
+}
+
+//////////////////////////////////////////////////////////////////////
+// HttpData
+//////////////////////////////////////////////////////////////////////
+
+HttpData::HttpData() : version(HVER_1_1) {
+}
+
+HttpData::~HttpData() = default;
+
+void
+HttpData::clear(bool release_document) {
+ // Clear headers first, since releasing a document may have far-reaching
+ // effects.
+ headers_.clear();
+ if (release_document) {
+ document.reset();
+ }
+}
+
+void
+HttpData::copy(const HttpData& src) {
+ headers_ = src.headers_;
+}
+
+void
+HttpData::changeHeader(const std::string& name, const std::string& value,
+ HeaderCombine combine) {
+ if (combine == HC_AUTO) {
+ HttpHeader header;
+ // Unrecognized headers are collapsible
+ combine = !FromString(header, name) || HttpHeaderIsCollapsible(header)
+ ? HC_YES : HC_NO;
+ } else if (combine == HC_REPLACE) {
+ headers_.erase(name);
+ combine = HC_NO;
+ }
+ // At this point, combine is one of (YES, NO, NEW)
+ if (combine != HC_NO) {
+ HeaderMap::iterator it = headers_.find(name);
+ if (it != headers_.end()) {
+ if (combine == HC_YES) {
+ it->second.append(",");
+ it->second.append(value);
+ }
+ return;
+ }
+ }
+ headers_.insert(HeaderMap::value_type(name, value));
+}
+
+size_t HttpData::clearHeader(const std::string& name) {
+ return headers_.erase(name);
+}
+
+HttpData::iterator HttpData::clearHeader(iterator header) {
+ iterator deprecated = header++;
+ headers_.erase(deprecated);
+ return header;
+}
+
+bool
+HttpData::hasHeader(const std::string& name, std::string* value) const {
+ HeaderMap::const_iterator it = headers_.find(name);
+ if (it == headers_.end()) {
+ return false;
+ } else if (value) {
+ *value = it->second;
+ }
+ return true;
+}
+
+void HttpData::setContent(const std::string& content_type,
+ StreamInterface* document) {
+ setHeader(HH_CONTENT_TYPE, content_type);
+ setDocumentAndLength(document);
+}
+
+void HttpData::setDocumentAndLength(StreamInterface* document) {
+ // TODO: Consider calling Rewind() here?
+ RTC_DCHECK(!hasHeader(HH_CONTENT_LENGTH, nullptr));
+ RTC_DCHECK(!hasHeader(HH_TRANSFER_ENCODING, nullptr));
+ RTC_DCHECK(document != nullptr);
+ this->document.reset(document);
+ size_t content_length = 0;
+ if (this->document->GetAvailable(&content_length)) {
+ char buffer[32];
+ sprintfn(buffer, sizeof(buffer), "%d", content_length);
+ setHeader(HH_CONTENT_LENGTH, buffer);
+ } else {
+ setHeader(HH_TRANSFER_ENCODING, "chunked");
+ }
+}
+
+//
+// HttpRequestData
+//
+
+void
+HttpRequestData::clear(bool release_document) {
+ verb = HV_GET;
+ path.clear();
+ HttpData::clear(release_document);
+}
+
+void
+HttpRequestData::copy(const HttpRequestData& src) {
+ verb = src.verb;
+ path = src.path;
+ HttpData::copy(src);
+}
+
+size_t
+HttpRequestData::formatLeader(char* buffer, size_t size) const {
+ RTC_DCHECK(path.find(' ') == std::string::npos);
+ return sprintfn(buffer, size, "%s %.*s HTTP/%s", ToString(verb), path.size(),
+ path.data(), ToString(version));
+}
+
+HttpError
+HttpRequestData::parseLeader(const char* line, size_t len) {
+ unsigned int vmajor, vminor;
+ int vend, dstart, dend;
+ // sscanf isn't safe with strings that aren't null-terminated, and there is
+ // no guarantee that |line| is. Create a local copy that is null-terminated.
+ std::string line_str(line, len);
+ line = line_str.c_str();
+ if ((sscanf(line, "%*s%n %n%*s%n HTTP/%u.%u",
+ &vend, &dstart, &dend, &vmajor, &vminor) != 2)
+ || (vmajor != 1)) {
+ return HE_PROTOCOL;
+ }
+ if (vminor == 0) {
+ version = HVER_1_0;
+ } else if (vminor == 1) {
+ version = HVER_1_1;
+ } else {
+ return HE_PROTOCOL;
+ }
+ std::string sverb(line, vend);
+ if (!FromString(verb, sverb.c_str())) {
+ return HE_PROTOCOL; // !?! HC_METHOD_NOT_SUPPORTED?
+ }
+ path.assign(line + dstart, line + dend);
+ return HE_NONE;
+}
+
+bool HttpRequestData::getAbsoluteUri(std::string* uri) const {
+ if (HV_CONNECT == verb)
+ return false;
+ Url<char> url(path);
+ if (url.valid()) {
+ uri->assign(path);
+ return true;
+ }
+ std::string host;
+ if (!hasHeader(HH_HOST, &host))
+ return false;
+ url.set_address(host);
+ url.set_full_path(path);
+ uri->assign(url.url());
+ return url.valid();
+}
+
+bool HttpRequestData::getRelativeUri(std::string* host,
+ std::string* path) const
+{
+ if (HV_CONNECT == verb)
+ return false;
+ Url<char> url(this->path);
+ if (url.valid()) {
+ host->assign(url.address());
+ path->assign(url.full_path());
+ return true;
+ }
+ if (!hasHeader(HH_HOST, host))
+ return false;
+ path->assign(this->path);
+ return true;
+}
+
+//
+// HttpResponseData
+//
+
+void
+HttpResponseData::clear(bool release_document) {
+ scode = HC_INTERNAL_SERVER_ERROR;
+ message.clear();
+ HttpData::clear(release_document);
+}
+
+void
+HttpResponseData::copy(const HttpResponseData& src) {
+ scode = src.scode;
+ message = src.message;
+ HttpData::copy(src);
+}
+
+void HttpResponseData::set_success(uint32_t scode) {
+ this->scode = scode;
+ message.clear();
+ setHeader(HH_CONTENT_LENGTH, "0", false);
+}
+
+void HttpResponseData::set_success(const std::string& content_type,
+ StreamInterface* document,
+ uint32_t scode) {
+ this->scode = scode;
+ message.erase(message.begin(), message.end());
+ setContent(content_type, document);
+}
+
+void HttpResponseData::set_redirect(const std::string& location,
+ uint32_t scode) {
+ this->scode = scode;
+ message.clear();
+ setHeader(HH_LOCATION, location);
+ setHeader(HH_CONTENT_LENGTH, "0", false);
+}
+
+void HttpResponseData::set_error(uint32_t scode) {
+ this->scode = scode;
+ message.clear();
+ setHeader(HH_CONTENT_LENGTH, "0", false);
+}
+
+size_t
+HttpResponseData::formatLeader(char* buffer, size_t size) const {
+ size_t len = sprintfn(buffer, size, "HTTP/%s %lu", ToString(version), scode);
+ if (!message.empty()) {
+ len += sprintfn(buffer + len, size - len, " %.*s",
+ message.size(), message.data());
+ }
+ return len;
+}
+
+HttpError
+HttpResponseData::parseLeader(const char* line, size_t len) {
+ size_t pos = 0;
+ unsigned int vmajor, vminor, temp_scode;
+ int temp_pos;
+ // sscanf isn't safe with strings that aren't null-terminated, and there is
+ // no guarantee that |line| is. Create a local copy that is null-terminated.
+ std::string line_str(line, len);
+ line = line_str.c_str();
+ if (sscanf(line, "HTTP %u%n",
+ &temp_scode, &temp_pos) == 1) {
+ // This server's response has no version. :( NOTE: This happens for every
+ // response to requests made from Chrome plugins, regardless of the server's
+ // behaviour.
+ LOG(LS_VERBOSE) << "HTTP version missing from response";
+ version = HVER_UNKNOWN;
+ } else if ((sscanf(line, "HTTP/%u.%u %u%n",
+ &vmajor, &vminor, &temp_scode, &temp_pos) == 3)
+ && (vmajor == 1)) {
+ // This server's response does have a version.
+ if (vminor == 0) {
+ version = HVER_1_0;
+ } else if (vminor == 1) {
+ version = HVER_1_1;
+ } else {
+ return HE_PROTOCOL;
+ }
+ } else {
+ return HE_PROTOCOL;
+ }
+ scode = temp_scode;
+ pos = static_cast<size_t>(temp_pos);
+ while ((pos < len) && isspace(static_cast<unsigned char>(line[pos]))) ++pos;
+ message.assign(line + pos, len - pos);
+ return HE_NONE;
+}
+
+//////////////////////////////////////////////////////////////////////
+// Http Authentication
+//////////////////////////////////////////////////////////////////////
+
+std::string quote(const std::string& str) {
+ std::string result;
+ result.push_back('"');
+ for (size_t i=0; i<str.size(); ++i) {
+ if ((str[i] == '"') || (str[i] == '\\'))
+ result.push_back('\\');
+ result.push_back(str[i]);
+ }
+ result.push_back('"');
+ return result;
+}
+
+#if defined(WEBRTC_WIN)
+struct NegotiateAuthContext : public HttpAuthContext {
+ CredHandle cred;
+ CtxtHandle ctx;
+ size_t steps;
+ bool specified_credentials;
+
+ NegotiateAuthContext(const std::string& auth, CredHandle c1, CtxtHandle c2)
+ : HttpAuthContext(auth), cred(c1), ctx(c2), steps(0),
+ specified_credentials(false)
+ { }
+
+ virtual ~NegotiateAuthContext() {
+ DeleteSecurityContext(&ctx);
+ FreeCredentialsHandle(&cred);
+ }
+};
+#endif // WEBRTC_WIN
+
+HttpAuthResult HttpAuthenticate(
+ const char * challenge, size_t len,
+ const SocketAddress& server,
+ const std::string& method, const std::string& uri,
+ const std::string& username, const CryptString& password,
+ HttpAuthContext *& context, std::string& response, std::string& auth_method)
+{
+ HttpAttributeList args;
+ HttpParseAttributes(challenge, len, args);
+ HttpHasNthAttribute(args, 0, &auth_method, nullptr);
+
+ if (context && (context->auth_method != auth_method))
+ return HAR_IGNORE;
+
+ // BASIC
+ if (_stricmp(auth_method.c_str(), "basic") == 0) {
+ if (context)
+ return HAR_CREDENTIALS; // Bad credentials
+ if (username.empty())
+ return HAR_CREDENTIALS; // Missing credentials
+
+ context = new HttpAuthContext(auth_method);
+
+ // TODO: convert sensitive to a secure buffer that gets securely deleted
+ //std::string decoded = username + ":" + password;
+ size_t len = username.size() + password.GetLength() + 2;
+ char * sensitive = new char[len];
+ size_t pos = strcpyn(sensitive, len, username.data(), username.size());
+ pos += strcpyn(sensitive + pos, len - pos, ":");
+ password.CopyTo(sensitive + pos, true);
+
+ response = auth_method;
+ response.append(" ");
+ // TODO: create a sensitive-source version of Base64::encode
+ response.append(Base64::Encode(sensitive));
+ memset(sensitive, 0, len);
+ delete [] sensitive;
+ return HAR_RESPONSE;
+ }
+
+ // DIGEST
+ if (_stricmp(auth_method.c_str(), "digest") == 0) {
+ if (context)
+ return HAR_CREDENTIALS; // Bad credentials
+ if (username.empty())
+ return HAR_CREDENTIALS; // Missing credentials
+
+ context = new HttpAuthContext(auth_method);
+
+ std::string cnonce, ncount;
+ char buffer[256];
+ sprintf(buffer, "%d", static_cast<int>(time(0)));
+ cnonce = MD5(buffer);
+ ncount = "00000001";
+
+ std::string realm, nonce, qop, opaque;
+ HttpHasAttribute(args, "realm", &realm);
+ HttpHasAttribute(args, "nonce", &nonce);
+ bool has_qop = HttpHasAttribute(args, "qop", &qop);
+ bool has_opaque = HttpHasAttribute(args, "opaque", &opaque);
+
+ // TODO: convert sensitive to be secure buffer
+ //std::string A1 = username + ":" + realm + ":" + password;
+ size_t len = username.size() + realm.size() + password.GetLength() + 3;
+ char * sensitive = new char[len]; // A1
+ size_t pos = strcpyn(sensitive, len, username.data(), username.size());
+ pos += strcpyn(sensitive + pos, len - pos, ":");
+ pos += strcpyn(sensitive + pos, len - pos, realm.c_str());
+ pos += strcpyn(sensitive + pos, len - pos, ":");
+ password.CopyTo(sensitive + pos, true);
+
+ std::string A2 = method + ":" + uri;
+ std::string middle;
+ if (has_qop) {
+ qop = "auth";
+ middle = nonce + ":" + ncount + ":" + cnonce + ":" + qop;
+ } else {
+ middle = nonce;
+ }
+ std::string HA1 = MD5(sensitive);
+ memset(sensitive, 0, len);
+ delete [] sensitive;
+ std::string HA2 = MD5(A2);
+ std::string dig_response = MD5(HA1 + ":" + middle + ":" + HA2);
+
+ std::stringstream ss;
+ ss << auth_method;
+ ss << " username=" << quote(username);
+ ss << ", realm=" << quote(realm);
+ ss << ", nonce=" << quote(nonce);
+ ss << ", uri=" << quote(uri);
+ if (has_qop) {
+ ss << ", qop=" << qop;
+ ss << ", nc=" << ncount;
+ ss << ", cnonce=" << quote(cnonce);
+ }
+ ss << ", response=\"" << dig_response << "\"";
+ if (has_opaque) {
+ ss << ", opaque=" << quote(opaque);
+ }
+ response = ss.str();
+ return HAR_RESPONSE;
+ }
+
+#if defined(WEBRTC_WIN)
+#if 1
+ bool want_negotiate = (_stricmp(auth_method.c_str(), "negotiate") == 0);
+ bool want_ntlm = (_stricmp(auth_method.c_str(), "ntlm") == 0);
+ // SPNEGO & NTLM
+ if (want_negotiate || want_ntlm) {
+ const size_t MAX_MESSAGE = 12000, MAX_SPN = 256;
+ char out_buf[MAX_MESSAGE], spn[MAX_SPN];
+
+#if 0 // Requires funky windows versions
+ DWORD len = MAX_SPN;
+ if (DsMakeSpn("HTTP", server.HostAsURIString().c_str(), nullptr,
+ server.port(),
+ 0, &len, spn) != ERROR_SUCCESS) {
+ LOG_F(WARNING) << "(Negotiate) - DsMakeSpn failed";
+ return HAR_IGNORE;
+ }
+#else
+ sprintfn(spn, MAX_SPN, "HTTP/%s", server.ToString().c_str());
+#endif
+
+ SecBuffer out_sec;
+ out_sec.pvBuffer = out_buf;
+ out_sec.cbBuffer = sizeof(out_buf);
+ out_sec.BufferType = SECBUFFER_TOKEN;
+
+ SecBufferDesc out_buf_desc;
+ out_buf_desc.ulVersion = 0;
+ out_buf_desc.cBuffers = 1;
+ out_buf_desc.pBuffers = &out_sec;
+
+ const ULONG NEG_FLAGS_DEFAULT =
+ //ISC_REQ_ALLOCATE_MEMORY
+ ISC_REQ_CONFIDENTIALITY
+ //| ISC_REQ_EXTENDED_ERROR
+ //| ISC_REQ_INTEGRITY
+ | ISC_REQ_REPLAY_DETECT
+ | ISC_REQ_SEQUENCE_DETECT
+ //| ISC_REQ_STREAM
+ //| ISC_REQ_USE_SUPPLIED_CREDS
+ ;
+
+ ::TimeStamp lifetime;
+ SECURITY_STATUS ret = S_OK;
+ ULONG ret_flags = 0, flags = NEG_FLAGS_DEFAULT;
+
+ bool specify_credentials = !username.empty();
+ size_t steps = 0;
+
+ // uint32_t now = Time();
+
+ NegotiateAuthContext * neg = static_cast<NegotiateAuthContext *>(context);
+ if (neg) {
+ const size_t max_steps = 10;
+ if (++neg->steps >= max_steps) {
+ LOG(WARNING) << "AsyncHttpsProxySocket::Authenticate(Negotiate) too many retries";
+ return HAR_ERROR;
+ }
+ steps = neg->steps;
+
+ std::string challenge, decoded_challenge;
+ if (HttpHasNthAttribute(args, 1, &challenge, nullptr) &&
+ Base64::Decode(challenge, Base64::DO_STRICT, &decoded_challenge,
+ nullptr)) {
+ SecBuffer in_sec;
+ in_sec.pvBuffer = const_cast<char *>(decoded_challenge.data());
+ in_sec.cbBuffer = static_cast<unsigned long>(decoded_challenge.size());
+ in_sec.BufferType = SECBUFFER_TOKEN;
+
+ SecBufferDesc in_buf_desc;
+ in_buf_desc.ulVersion = 0;
+ in_buf_desc.cBuffers = 1;
+ in_buf_desc.pBuffers = &in_sec;
+
+ ret = InitializeSecurityContextA(&neg->cred, &neg->ctx, spn, flags, 0, SECURITY_NATIVE_DREP, &in_buf_desc, 0, &neg->ctx, &out_buf_desc, &ret_flags, &lifetime);
+ //LOG(INFO) << "$$$ InitializeSecurityContext @ " << TimeSince(now);
+ if (FAILED(ret)) {
+ LOG(LS_ERROR) << "InitializeSecurityContext returned: "
+ << ErrorName(ret, SECURITY_ERRORS);
+ return HAR_ERROR;
+ }
+ } else if (neg->specified_credentials) {
+ // Try again with default credentials
+ specify_credentials = false;
+ delete context;
+ context = neg = 0;
+ } else {
+ return HAR_CREDENTIALS;
+ }
+ }
+
+ if (!neg) {
+ unsigned char userbuf[256], passbuf[256], domainbuf[16];
+ SEC_WINNT_AUTH_IDENTITY_A auth_id, * pauth_id = 0;
+ if (specify_credentials) {
+ memset(&auth_id, 0, sizeof(auth_id));
+ size_t len = password.GetLength()+1;
+ char * sensitive = new char[len];
+ password.CopyTo(sensitive, true);
+ std::string::size_type pos = username.find('\\');
+ if (pos == std::string::npos) {
+ auth_id.UserLength = static_cast<unsigned long>(
+ std::min(sizeof(userbuf) - 1, username.size()));
+ memcpy(userbuf, username.c_str(), auth_id.UserLength);
+ userbuf[auth_id.UserLength] = 0;
+ auth_id.DomainLength = 0;
+ domainbuf[auth_id.DomainLength] = 0;
+ auth_id.PasswordLength = static_cast<unsigned long>(
+ std::min(sizeof(passbuf) - 1, password.GetLength()));
+ memcpy(passbuf, sensitive, auth_id.PasswordLength);
+ passbuf[auth_id.PasswordLength] = 0;
+ } else {
+ auth_id.UserLength = static_cast<unsigned long>(
+ std::min(sizeof(userbuf) - 1, username.size() - pos - 1));
+ memcpy(userbuf, username.c_str() + pos + 1, auth_id.UserLength);
+ userbuf[auth_id.UserLength] = 0;
+ auth_id.DomainLength =
+ static_cast<unsigned long>(std::min(sizeof(domainbuf) - 1, pos));
+ memcpy(domainbuf, username.c_str(), auth_id.DomainLength);
+ domainbuf[auth_id.DomainLength] = 0;
+ auth_id.PasswordLength = static_cast<unsigned long>(
+ std::min(sizeof(passbuf) - 1, password.GetLength()));
+ memcpy(passbuf, sensitive, auth_id.PasswordLength);
+ passbuf[auth_id.PasswordLength] = 0;
+ }
+ memset(sensitive, 0, len);
+ delete [] sensitive;
+ auth_id.User = userbuf;
+ auth_id.Domain = domainbuf;
+ auth_id.Password = passbuf;
+ auth_id.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
+ pauth_id = &auth_id;
+ LOG(LS_VERBOSE) << "Negotiate protocol: Using specified credentials";
+ } else {
+ LOG(LS_VERBOSE) << "Negotiate protocol: Using default credentials";
+ }
+
+ CredHandle cred;
+ ret = AcquireCredentialsHandleA(
+ 0, const_cast<char*>(want_negotiate ? NEGOSSP_NAME_A : NTLMSP_NAME_A),
+ SECPKG_CRED_OUTBOUND, 0, pauth_id, 0, 0, &cred, &lifetime);
+ //LOG(INFO) << "$$$ AcquireCredentialsHandle @ " << TimeSince(now);
+ if (ret != SEC_E_OK) {
+ LOG(LS_ERROR) << "AcquireCredentialsHandle error: "
+ << ErrorName(ret, SECURITY_ERRORS);
+ return HAR_IGNORE;
+ }
+
+ //CSecBufferBundle<5, CSecBufferBase::FreeSSPI> sb_out;
+
+ CtxtHandle ctx;
+ ret = InitializeSecurityContextA(&cred, 0, spn, flags, 0, SECURITY_NATIVE_DREP, 0, 0, &ctx, &out_buf_desc, &ret_flags, &lifetime);
+ //LOG(INFO) << "$$$ InitializeSecurityContext @ " << TimeSince(now);
+ if (FAILED(ret)) {
+ LOG(LS_ERROR) << "InitializeSecurityContext returned: "
+ << ErrorName(ret, SECURITY_ERRORS);
+ FreeCredentialsHandle(&cred);
+ return HAR_IGNORE;
+ }
+
+ RTC_DCHECK(!context);
+ context = neg = new NegotiateAuthContext(auth_method, cred, ctx);
+ neg->specified_credentials = specify_credentials;
+ neg->steps = steps;
+ }
+
+ if ((ret == SEC_I_COMPLETE_NEEDED) || (ret == SEC_I_COMPLETE_AND_CONTINUE)) {
+ ret = CompleteAuthToken(&neg->ctx, &out_buf_desc);
+ //LOG(INFO) << "$$$ CompleteAuthToken @ " << TimeSince(now);
+ LOG(LS_VERBOSE) << "CompleteAuthToken returned: "
+ << ErrorName(ret, SECURITY_ERRORS);
+ if (FAILED(ret)) {
+ return HAR_ERROR;
+ }
+ }
+
+ //LOG(INFO) << "$$$ NEGOTIATE took " << TimeSince(now) << "ms";
+
+ std::string decoded(out_buf, out_buf + out_sec.cbBuffer);
+ response = auth_method;
+ response.append(" ");
+ response.append(Base64::Encode(decoded));
+ return HAR_RESPONSE;
+ }
+#endif
+#endif // WEBRTC_WIN
+
+ return HAR_IGNORE;
+}
+
+//////////////////////////////////////////////////////////////////////
+
+} // namespace rtc