/*
* 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 "webrtc/base/httpcommon-inl.h"
#include "webrtc/base/base64.h"
#include "webrtc/base/common.h"
#include "webrtc/base/cryptstring.h"
#include "webrtc/base/httpcommon.h"
#include "webrtc/base/socketaddress.h"
#include "webrtc/base/stringdigest.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 code) {
return !HttpCodeIsInformational(code)
&& (code != HC_NO_CONTENT) && (code != HC_NOT_MODIFIED);
}
bool HttpCodeIsCacheable(uint32 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
};
ASSERT(NULL != 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, ARRAY_SIZE(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
*seconds = gmt - timezone;
#endif
return true;
}
std::string HttpAddress(const SocketAddress& address, bool secure) {
return (address.port() == HttpDefaultPort(secure))
? address.hostname() : address.ToString();
}
//////////////////////////////////////////////////////////////////////
// HttpData
//////////////////////////////////////////////////////////////////////
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?
ASSERT(!hasHeader(HH_CONTENT_LENGTH, NULL));
ASSERT(!hasHeader(HH_TRANSFER_ENCODING, NULL));
ASSERT(document != NULL);
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 {
ASSERT(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 scode) {
this->scode = scode;
message.clear();
setHeader(HH_CONTENT_LENGTH, "0", false);
}
void
HttpResponseData::set_success(const std::string& content_type,
StreamInterface* document,
uint32 scode) {
this->scode = scode;
message.erase(message.begin(), message.end());
setContent(content_type, document);
}
void
HttpResponseData::set_redirect(const std::string& location, uint32 scode) {
this->scode = scode;
message.clear();
setHeader(HH_LOCATION, location);
setHeader(HH_CONTENT_LENGTH, "0", false);
}
void
HttpResponseData::set_error(uint32 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
//////////////////////////////////////////////////////////////////////
#define TEST_DIGEST 0
#if TEST_DIGEST
/*
const char * const DIGEST_CHALLENGE =
"Digest realm=\"testrealm@host.com\","
" qop=\"auth,auth-int\","
" nonce=\"dcd98b7102dd2f0e8b11d0f600bfb0c093\","
" opaque=\"5ccc069c403ebaf9f0171e9517f40e41\"";
const char * const DIGEST_METHOD = "GET";
const char * const DIGEST_URI =
"/dir/index.html";;
const char * const DIGEST_CNONCE =
"0a4f113b";
const char * const DIGEST_RESPONSE =
"6629fae49393a05397450978507c4ef1";
//user_ = "Mufasa";
//pass_ = "Circle Of Life";
*/
const char * const DIGEST_CHALLENGE =
"Digest realm=\"Squid proxy-caching web server\","
" nonce=\"Nny4QuC5PwiSDixJ\","
" qop=\"auth\","
" stale=false";
const char * const DIGEST_URI =
"/";
const char * const DIGEST_CNONCE =
"6501d58e9a21cee1e7b5fec894ded024";
const char * const DIGEST_RESPONSE =
"edffcb0829e755838b073a4a42de06bc";
#endif
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)
{
#if TEST_DIGEST
challenge = DIGEST_CHALLENGE;
len = strlen(challenge);
#endif
HttpAttributeList args;
HttpParseAttributes(challenge, len, args);
HttpHasNthAttribute(args, 0, &auth_method, NULL);
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;
#if TEST_DIGEST
method = DIGEST_METHOD;
uri = DIGEST_URI;
cnonce = DIGEST_CNONCE;
#else
char buffer[256];
sprintf(buffer, "%d", static_cast<int>(time(0)));
cnonce = MD5(buffer);
#endif
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);
#if TEST_DIGEST
ASSERT(strcmp(dig_response.c_str(), DIGEST_RESPONSE) == 0);
#endif
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(), NULL,
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 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, NULL)
&& Base64::Decode(challenge, Base64::DO_STRICT,
&decoded_challenge, NULL)) {
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>(
_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>(
_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>(
_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>(
_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>(
_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) << "$$$ InitializeSecurityContext @ " << TimeSince(now);
if (FAILED(ret)) {
LOG(LS_ERROR) << "InitializeSecurityContext returned: "
<< ErrorName(ret, SECURITY_ERRORS);
FreeCredentialsHandle(&cred);
return HAR_IGNORE;
}
ASSERT(!context);
context = neg = new NegotiateAuthContext(auth_method, cred, ctx);
neg->specified_credentials = specify_credentials;
neg->steps = steps;
}
if ((ret == SEC_I_COMPLETE_NEEDED) || (ret == SEC_I_COMPLETE_AND_CONTINUE)) {
ret = CompleteAuthToken(&neg->ctx, &out_buf_desc);
//LOG(INFO) << "$$$ 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