| /* |
| * 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/base64.h" |
| #include "webrtc/base/common.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 |
| }; |
| |
| 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 |
| #if _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? |
| 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_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 |
| ////////////////////////////////////////////////////////////////////// |
| |
| #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_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, 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>( |
| 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) << "$$$ InitializeSecurityContext @ " << TimeSince(now); |
| if (FAILED(ret)) { |
| LOG(LS_ERROR) << "InitializeSecurityContext returned: " |
| << ErrorName(ret, SECURITY_ERRORS); |
| FreeCredentialsHandle(&cred); |
| return HAR_IGNORE; |
| } |
| |
| ASSERT(!context); |
| context = neg = new NegotiateAuthContext(auth_method, cred, ctx); |
| neg->specified_credentials = specify_credentials; |
| neg->steps = steps; |
| } |
| |
| if ((ret == SEC_I_COMPLETE_NEEDED) || (ret == SEC_I_COMPLETE_AND_CONTINUE)) { |
| ret = CompleteAuthToken(&neg->ctx, &out_buf_desc); |
| //LOG(INFO) << "$$$ 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 |