Thu, 22 Jan 2015 13:21:57 +0100
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
michael@0 | 1 | /* vim:set ts=4 sw=4 sts=4 et cindent: */ |
michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
michael@0 | 5 | |
michael@0 | 6 | // |
michael@0 | 7 | // Negotiate Authentication Support Module |
michael@0 | 8 | // |
michael@0 | 9 | // Described by IETF Internet draft: draft-brezak-kerberos-http-00.txt |
michael@0 | 10 | // (formerly draft-brezak-spnego-http-04.txt) |
michael@0 | 11 | // |
michael@0 | 12 | // Also described here: |
michael@0 | 13 | // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsecure/html/http-sso-1.asp |
michael@0 | 14 | // |
michael@0 | 15 | |
michael@0 | 16 | #include "nsAuthSSPI.h" |
michael@0 | 17 | #include "nsIServiceManager.h" |
michael@0 | 18 | #include "nsIDNSService.h" |
michael@0 | 19 | #include "nsIDNSRecord.h" |
michael@0 | 20 | #include "nsNetCID.h" |
michael@0 | 21 | #include "nsCOMPtr.h" |
michael@0 | 22 | #include "nsICryptoHash.h" |
michael@0 | 23 | #include "mozilla/Telemetry.h" |
michael@0 | 24 | |
michael@0 | 25 | #include <windows.h> |
michael@0 | 26 | |
michael@0 | 27 | #define SEC_SUCCESS(Status) ((Status) >= 0) |
michael@0 | 28 | |
michael@0 | 29 | #ifndef KERB_WRAP_NO_ENCRYPT |
michael@0 | 30 | #define KERB_WRAP_NO_ENCRYPT 0x80000001 |
michael@0 | 31 | #endif |
michael@0 | 32 | |
michael@0 | 33 | #ifndef SECBUFFER_PADDING |
michael@0 | 34 | #define SECBUFFER_PADDING 9 |
michael@0 | 35 | #endif |
michael@0 | 36 | |
michael@0 | 37 | #ifndef SECBUFFER_STREAM |
michael@0 | 38 | #define SECBUFFER_STREAM 10 |
michael@0 | 39 | #endif |
michael@0 | 40 | |
michael@0 | 41 | //----------------------------------------------------------------------------- |
michael@0 | 42 | |
michael@0 | 43 | static const wchar_t *const pTypeName [] = { |
michael@0 | 44 | L"Kerberos", |
michael@0 | 45 | L"Negotiate", |
michael@0 | 46 | L"NTLM" |
michael@0 | 47 | }; |
michael@0 | 48 | |
michael@0 | 49 | #ifdef DEBUG |
michael@0 | 50 | #define CASE_(_x) case _x: return # _x; |
michael@0 | 51 | static const char *MapErrorCode(int rc) |
michael@0 | 52 | { |
michael@0 | 53 | switch (rc) { |
michael@0 | 54 | CASE_(SEC_E_OK) |
michael@0 | 55 | CASE_(SEC_I_CONTINUE_NEEDED) |
michael@0 | 56 | CASE_(SEC_I_COMPLETE_NEEDED) |
michael@0 | 57 | CASE_(SEC_I_COMPLETE_AND_CONTINUE) |
michael@0 | 58 | CASE_(SEC_E_INCOMPLETE_MESSAGE) |
michael@0 | 59 | CASE_(SEC_I_INCOMPLETE_CREDENTIALS) |
michael@0 | 60 | CASE_(SEC_E_INVALID_HANDLE) |
michael@0 | 61 | CASE_(SEC_E_TARGET_UNKNOWN) |
michael@0 | 62 | CASE_(SEC_E_LOGON_DENIED) |
michael@0 | 63 | CASE_(SEC_E_INTERNAL_ERROR) |
michael@0 | 64 | CASE_(SEC_E_NO_CREDENTIALS) |
michael@0 | 65 | CASE_(SEC_E_NO_AUTHENTICATING_AUTHORITY) |
michael@0 | 66 | CASE_(SEC_E_INSUFFICIENT_MEMORY) |
michael@0 | 67 | CASE_(SEC_E_INVALID_TOKEN) |
michael@0 | 68 | } |
michael@0 | 69 | return "<unknown>"; |
michael@0 | 70 | } |
michael@0 | 71 | #else |
michael@0 | 72 | #define MapErrorCode(_rc) "" |
michael@0 | 73 | #endif |
michael@0 | 74 | |
michael@0 | 75 | //----------------------------------------------------------------------------- |
michael@0 | 76 | |
michael@0 | 77 | static PSecurityFunctionTableW sspi; |
michael@0 | 78 | |
michael@0 | 79 | static nsresult |
michael@0 | 80 | InitSSPI() |
michael@0 | 81 | { |
michael@0 | 82 | LOG((" InitSSPI\n")); |
michael@0 | 83 | |
michael@0 | 84 | sspi = InitSecurityInterfaceW(); |
michael@0 | 85 | if (!sspi) { |
michael@0 | 86 | LOG(("InitSecurityInterfaceW failed")); |
michael@0 | 87 | return NS_ERROR_UNEXPECTED; |
michael@0 | 88 | } |
michael@0 | 89 | |
michael@0 | 90 | return NS_OK; |
michael@0 | 91 | } |
michael@0 | 92 | |
michael@0 | 93 | //----------------------------------------------------------------------------- |
michael@0 | 94 | |
michael@0 | 95 | static nsresult |
michael@0 | 96 | MakeSN(const char *principal, nsCString &result) |
michael@0 | 97 | { |
michael@0 | 98 | nsresult rv; |
michael@0 | 99 | |
michael@0 | 100 | nsAutoCString buf(principal); |
michael@0 | 101 | |
michael@0 | 102 | // The service name looks like "protocol@hostname", we need to map |
michael@0 | 103 | // this to a value that SSPI expects. To be consistent with IE, we |
michael@0 | 104 | // need to map '@' to '/' and canonicalize the hostname. |
michael@0 | 105 | int32_t index = buf.FindChar('@'); |
michael@0 | 106 | if (index == kNotFound) |
michael@0 | 107 | return NS_ERROR_UNEXPECTED; |
michael@0 | 108 | |
michael@0 | 109 | nsCOMPtr<nsIDNSService> dns = do_GetService(NS_DNSSERVICE_CONTRACTID, &rv); |
michael@0 | 110 | if (NS_FAILED(rv)) |
michael@0 | 111 | return rv; |
michael@0 | 112 | |
michael@0 | 113 | // This could be expensive if our DNS cache cannot satisfy the request. |
michael@0 | 114 | // However, we should have at least hit the OS resolver once prior to |
michael@0 | 115 | // reaching this code, so provided the OS resolver has this information |
michael@0 | 116 | // cached, we should not have to worry about blocking on this function call |
michael@0 | 117 | // for very long. NOTE: because we ask for the canonical hostname, we |
michael@0 | 118 | // might end up requiring extra network activity in cases where the OS |
michael@0 | 119 | // resolver might not have enough information to satisfy the request from |
michael@0 | 120 | // its cache. This is not an issue in versions of Windows up to WinXP. |
michael@0 | 121 | nsCOMPtr<nsIDNSRecord> record; |
michael@0 | 122 | rv = dns->Resolve(Substring(buf, index + 1), |
michael@0 | 123 | nsIDNSService::RESOLVE_CANONICAL_NAME, |
michael@0 | 124 | getter_AddRefs(record)); |
michael@0 | 125 | if (NS_FAILED(rv)) |
michael@0 | 126 | return rv; |
michael@0 | 127 | |
michael@0 | 128 | nsAutoCString cname; |
michael@0 | 129 | rv = record->GetCanonicalName(cname); |
michael@0 | 130 | if (NS_SUCCEEDED(rv)) { |
michael@0 | 131 | result = StringHead(buf, index) + NS_LITERAL_CSTRING("/") + cname; |
michael@0 | 132 | LOG(("Using SPN of [%s]\n", result.get())); |
michael@0 | 133 | } |
michael@0 | 134 | return rv; |
michael@0 | 135 | } |
michael@0 | 136 | |
michael@0 | 137 | //----------------------------------------------------------------------------- |
michael@0 | 138 | |
michael@0 | 139 | nsAuthSSPI::nsAuthSSPI(pType package) |
michael@0 | 140 | : mServiceFlags(REQ_DEFAULT) |
michael@0 | 141 | , mMaxTokenLen(0) |
michael@0 | 142 | , mPackage(package) |
michael@0 | 143 | , mCertDERData(nullptr) |
michael@0 | 144 | , mCertDERLength(0) |
michael@0 | 145 | { |
michael@0 | 146 | memset(&mCred, 0, sizeof(mCred)); |
michael@0 | 147 | memset(&mCtxt, 0, sizeof(mCtxt)); |
michael@0 | 148 | } |
michael@0 | 149 | |
michael@0 | 150 | nsAuthSSPI::~nsAuthSSPI() |
michael@0 | 151 | { |
michael@0 | 152 | Reset(); |
michael@0 | 153 | |
michael@0 | 154 | if (mCred.dwLower || mCred.dwUpper) { |
michael@0 | 155 | #ifdef __MINGW32__ |
michael@0 | 156 | (sspi->FreeCredentialsHandle)(&mCred); |
michael@0 | 157 | #else |
michael@0 | 158 | (sspi->FreeCredentialHandle)(&mCred); |
michael@0 | 159 | #endif |
michael@0 | 160 | memset(&mCred, 0, sizeof(mCred)); |
michael@0 | 161 | } |
michael@0 | 162 | } |
michael@0 | 163 | |
michael@0 | 164 | void |
michael@0 | 165 | nsAuthSSPI::Reset() |
michael@0 | 166 | { |
michael@0 | 167 | mIsFirst = true; |
michael@0 | 168 | |
michael@0 | 169 | if (mCertDERData){ |
michael@0 | 170 | nsMemory::Free(mCertDERData); |
michael@0 | 171 | mCertDERData = nullptr; |
michael@0 | 172 | mCertDERLength = 0; |
michael@0 | 173 | } |
michael@0 | 174 | |
michael@0 | 175 | if (mCtxt.dwLower || mCtxt.dwUpper) { |
michael@0 | 176 | (sspi->DeleteSecurityContext)(&mCtxt); |
michael@0 | 177 | memset(&mCtxt, 0, sizeof(mCtxt)); |
michael@0 | 178 | } |
michael@0 | 179 | } |
michael@0 | 180 | |
michael@0 | 181 | NS_IMPL_ISUPPORTS(nsAuthSSPI, nsIAuthModule) |
michael@0 | 182 | |
michael@0 | 183 | NS_IMETHODIMP |
michael@0 | 184 | nsAuthSSPI::Init(const char *serviceName, |
michael@0 | 185 | uint32_t serviceFlags, |
michael@0 | 186 | const char16_t *domain, |
michael@0 | 187 | const char16_t *username, |
michael@0 | 188 | const char16_t *password) |
michael@0 | 189 | { |
michael@0 | 190 | LOG((" nsAuthSSPI::Init\n")); |
michael@0 | 191 | |
michael@0 | 192 | mIsFirst = true; |
michael@0 | 193 | mCertDERLength = 0; |
michael@0 | 194 | mCertDERData = nullptr; |
michael@0 | 195 | |
michael@0 | 196 | // The caller must supply a service name to be used. (For why we now require |
michael@0 | 197 | // a service name for NTLM, see bug 487872.) |
michael@0 | 198 | NS_ENSURE_TRUE(serviceName && *serviceName, NS_ERROR_INVALID_ARG); |
michael@0 | 199 | |
michael@0 | 200 | nsresult rv; |
michael@0 | 201 | |
michael@0 | 202 | // XXX lazy initialization like this assumes that we are single threaded |
michael@0 | 203 | if (!sspi) { |
michael@0 | 204 | rv = InitSSPI(); |
michael@0 | 205 | if (NS_FAILED(rv)) |
michael@0 | 206 | return rv; |
michael@0 | 207 | } |
michael@0 | 208 | SEC_WCHAR *package; |
michael@0 | 209 | |
michael@0 | 210 | package = (SEC_WCHAR *) pTypeName[(int)mPackage]; |
michael@0 | 211 | |
michael@0 | 212 | if (mPackage == PACKAGE_TYPE_NTLM) { |
michael@0 | 213 | // (bug 535193) For NTLM, just use the uri host, do not do canonical host lookups. |
michael@0 | 214 | // The incoming serviceName is in the format: "protocol@hostname", SSPI expects |
michael@0 | 215 | // "<service class>/<hostname>", so swap the '@' for a '/'. |
michael@0 | 216 | mServiceName.Assign(serviceName); |
michael@0 | 217 | int32_t index = mServiceName.FindChar('@'); |
michael@0 | 218 | if (index == kNotFound) |
michael@0 | 219 | return NS_ERROR_UNEXPECTED; |
michael@0 | 220 | mServiceName.Replace(index, 1, '/'); |
michael@0 | 221 | } |
michael@0 | 222 | else { |
michael@0 | 223 | // Kerberos requires the canonical host, MakeSN takes care of this through a |
michael@0 | 224 | // DNS lookup. |
michael@0 | 225 | rv = MakeSN(serviceName, mServiceName); |
michael@0 | 226 | if (NS_FAILED(rv)) |
michael@0 | 227 | return rv; |
michael@0 | 228 | } |
michael@0 | 229 | |
michael@0 | 230 | mServiceFlags = serviceFlags; |
michael@0 | 231 | |
michael@0 | 232 | SECURITY_STATUS rc; |
michael@0 | 233 | |
michael@0 | 234 | PSecPkgInfoW pinfo; |
michael@0 | 235 | rc = (sspi->QuerySecurityPackageInfoW)(package, &pinfo); |
michael@0 | 236 | if (rc != SEC_E_OK) { |
michael@0 | 237 | LOG(("%s package not found\n", package)); |
michael@0 | 238 | return NS_ERROR_UNEXPECTED; |
michael@0 | 239 | } |
michael@0 | 240 | mMaxTokenLen = pinfo->cbMaxToken; |
michael@0 | 241 | (sspi->FreeContextBuffer)(pinfo); |
michael@0 | 242 | |
michael@0 | 243 | MS_TimeStamp useBefore; |
michael@0 | 244 | |
michael@0 | 245 | SEC_WINNT_AUTH_IDENTITY_W ai; |
michael@0 | 246 | SEC_WINNT_AUTH_IDENTITY_W *pai = nullptr; |
michael@0 | 247 | |
michael@0 | 248 | // domain, username, and password will be null if nsHttpNTLMAuth's ChallengeReceived |
michael@0 | 249 | // returns false for identityInvalid. Use default credentials in this case by passing |
michael@0 | 250 | // null for pai. |
michael@0 | 251 | if (username && password) { |
michael@0 | 252 | // Keep a copy of these strings for the duration |
michael@0 | 253 | mUsername.Assign(username); |
michael@0 | 254 | mPassword.Assign(password); |
michael@0 | 255 | mDomain.Assign(domain); |
michael@0 | 256 | ai.Domain = reinterpret_cast<unsigned short*>(mDomain.BeginWriting()); |
michael@0 | 257 | ai.DomainLength = mDomain.Length(); |
michael@0 | 258 | ai.User = reinterpret_cast<unsigned short*>(mUsername.BeginWriting()); |
michael@0 | 259 | ai.UserLength = mUsername.Length(); |
michael@0 | 260 | ai.Password = reinterpret_cast<unsigned short*>(mPassword.BeginWriting()); |
michael@0 | 261 | ai.PasswordLength = mPassword.Length(); |
michael@0 | 262 | ai.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE; |
michael@0 | 263 | pai = &ai; |
michael@0 | 264 | } |
michael@0 | 265 | |
michael@0 | 266 | rc = (sspi->AcquireCredentialsHandleW)(nullptr, |
michael@0 | 267 | package, |
michael@0 | 268 | SECPKG_CRED_OUTBOUND, |
michael@0 | 269 | nullptr, |
michael@0 | 270 | pai, |
michael@0 | 271 | nullptr, |
michael@0 | 272 | nullptr, |
michael@0 | 273 | &mCred, |
michael@0 | 274 | &useBefore); |
michael@0 | 275 | if (rc != SEC_E_OK) |
michael@0 | 276 | return NS_ERROR_UNEXPECTED; |
michael@0 | 277 | |
michael@0 | 278 | static bool sTelemetrySent = false; |
michael@0 | 279 | if (!sTelemetrySent) { |
michael@0 | 280 | mozilla::Telemetry::Accumulate( |
michael@0 | 281 | mozilla::Telemetry::NTLM_MODULE_USED_2, |
michael@0 | 282 | serviceFlags & nsIAuthModule::REQ_PROXY_AUTH |
michael@0 | 283 | ? NTLM_MODULE_WIN_API_PROXY |
michael@0 | 284 | : NTLM_MODULE_WIN_API_DIRECT); |
michael@0 | 285 | sTelemetrySent = true; |
michael@0 | 286 | } |
michael@0 | 287 | |
michael@0 | 288 | LOG(("AcquireCredentialsHandle() succeeded.\n")); |
michael@0 | 289 | return NS_OK; |
michael@0 | 290 | } |
michael@0 | 291 | |
michael@0 | 292 | // The arguments inToken and inTokenLen are used to pass in the server |
michael@0 | 293 | // certificate (when available) in the first call of the function. The |
michael@0 | 294 | // second time these arguments hold an input token. |
michael@0 | 295 | NS_IMETHODIMP |
michael@0 | 296 | nsAuthSSPI::GetNextToken(const void *inToken, |
michael@0 | 297 | uint32_t inTokenLen, |
michael@0 | 298 | void **outToken, |
michael@0 | 299 | uint32_t *outTokenLen) |
michael@0 | 300 | { |
michael@0 | 301 | // String for end-point bindings. |
michael@0 | 302 | const char end_point[] = "tls-server-end-point:"; |
michael@0 | 303 | const int end_point_length = sizeof(end_point) - 1; |
michael@0 | 304 | const int hash_size = 32; // Size of a SHA256 hash. |
michael@0 | 305 | const int cbt_size = hash_size + end_point_length; |
michael@0 | 306 | |
michael@0 | 307 | SECURITY_STATUS rc; |
michael@0 | 308 | MS_TimeStamp ignored; |
michael@0 | 309 | |
michael@0 | 310 | DWORD ctxAttr, ctxReq = 0; |
michael@0 | 311 | CtxtHandle *ctxIn; |
michael@0 | 312 | SecBufferDesc ibd, obd; |
michael@0 | 313 | // Optional second input buffer for the CBT (Channel Binding Token) |
michael@0 | 314 | SecBuffer ib[2], ob; |
michael@0 | 315 | // Pointer to the block of memory that stores the CBT |
michael@0 | 316 | char* sspi_cbt = nullptr; |
michael@0 | 317 | SEC_CHANNEL_BINDINGS pendpoint_binding; |
michael@0 | 318 | |
michael@0 | 319 | LOG(("entering nsAuthSSPI::GetNextToken()\n")); |
michael@0 | 320 | |
michael@0 | 321 | if (!mCred.dwLower && !mCred.dwUpper) { |
michael@0 | 322 | LOG(("nsAuthSSPI::GetNextToken(), not initialized. exiting.")); |
michael@0 | 323 | return NS_ERROR_NOT_INITIALIZED; |
michael@0 | 324 | } |
michael@0 | 325 | |
michael@0 | 326 | if (mServiceFlags & REQ_DELEGATE) |
michael@0 | 327 | ctxReq |= ISC_REQ_DELEGATE; |
michael@0 | 328 | if (mServiceFlags & REQ_MUTUAL_AUTH) |
michael@0 | 329 | ctxReq |= ISC_REQ_MUTUAL_AUTH; |
michael@0 | 330 | |
michael@0 | 331 | if (inToken) { |
michael@0 | 332 | if (mIsFirst) { |
michael@0 | 333 | // First time if it comes with a token, |
michael@0 | 334 | // the token represents the server certificate. |
michael@0 | 335 | mIsFirst = false; |
michael@0 | 336 | mCertDERLength = inTokenLen; |
michael@0 | 337 | mCertDERData = nsMemory::Alloc(inTokenLen); |
michael@0 | 338 | if (!mCertDERData) |
michael@0 | 339 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 340 | memcpy(mCertDERData, inToken, inTokenLen); |
michael@0 | 341 | |
michael@0 | 342 | // We are starting a new authentication sequence. |
michael@0 | 343 | // If we have already initialized our |
michael@0 | 344 | // security context, then we're in trouble because it means that the |
michael@0 | 345 | // first sequence failed. We need to bail or else we might end up in |
michael@0 | 346 | // an infinite loop. |
michael@0 | 347 | if (mCtxt.dwLower || mCtxt.dwUpper) { |
michael@0 | 348 | LOG(("Cannot restart authentication sequence!")); |
michael@0 | 349 | return NS_ERROR_UNEXPECTED; |
michael@0 | 350 | } |
michael@0 | 351 | ctxIn = nullptr; |
michael@0 | 352 | // The certificate needs to be erased before being passed |
michael@0 | 353 | // to InitializeSecurityContextW(). |
michael@0 | 354 | inToken = nullptr; |
michael@0 | 355 | inTokenLen = 0; |
michael@0 | 356 | } else { |
michael@0 | 357 | ibd.ulVersion = SECBUFFER_VERSION; |
michael@0 | 358 | ibd.cBuffers = 0; |
michael@0 | 359 | ibd.pBuffers = ib; |
michael@0 | 360 | |
michael@0 | 361 | // If we have stored a certificate, the Channel Binding Token |
michael@0 | 362 | // needs to be generated and sent in the first input buffer. |
michael@0 | 363 | if (mCertDERLength > 0) { |
michael@0 | 364 | // First we create a proper Endpoint Binding structure. |
michael@0 | 365 | pendpoint_binding.dwInitiatorAddrType = 0; |
michael@0 | 366 | pendpoint_binding.cbInitiatorLength = 0; |
michael@0 | 367 | pendpoint_binding.dwInitiatorOffset = 0; |
michael@0 | 368 | pendpoint_binding.dwAcceptorAddrType = 0; |
michael@0 | 369 | pendpoint_binding.cbAcceptorLength = 0; |
michael@0 | 370 | pendpoint_binding.dwAcceptorOffset = 0; |
michael@0 | 371 | pendpoint_binding.cbApplicationDataLength = cbt_size; |
michael@0 | 372 | pendpoint_binding.dwApplicationDataOffset = |
michael@0 | 373 | sizeof(SEC_CHANNEL_BINDINGS); |
michael@0 | 374 | |
michael@0 | 375 | // Then add it to the array of sec buffers accordingly. |
michael@0 | 376 | ib[ibd.cBuffers].BufferType = SECBUFFER_CHANNEL_BINDINGS; |
michael@0 | 377 | ib[ibd.cBuffers].cbBuffer = |
michael@0 | 378 | pendpoint_binding.cbApplicationDataLength |
michael@0 | 379 | + pendpoint_binding.dwApplicationDataOffset; |
michael@0 | 380 | |
michael@0 | 381 | sspi_cbt = (char *) nsMemory::Alloc(ib[ibd.cBuffers].cbBuffer); |
michael@0 | 382 | if (!sspi_cbt){ |
michael@0 | 383 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 384 | } |
michael@0 | 385 | |
michael@0 | 386 | // Helper to write in the memory block that stores the CBT |
michael@0 | 387 | char* sspi_cbt_ptr = sspi_cbt; |
michael@0 | 388 | |
michael@0 | 389 | ib[ibd.cBuffers].pvBuffer = sspi_cbt; |
michael@0 | 390 | ibd.cBuffers++; |
michael@0 | 391 | |
michael@0 | 392 | memcpy(sspi_cbt_ptr, &pendpoint_binding, |
michael@0 | 393 | pendpoint_binding.dwApplicationDataOffset); |
michael@0 | 394 | sspi_cbt_ptr += pendpoint_binding.dwApplicationDataOffset; |
michael@0 | 395 | |
michael@0 | 396 | memcpy(sspi_cbt_ptr, end_point, end_point_length); |
michael@0 | 397 | sspi_cbt_ptr += end_point_length; |
michael@0 | 398 | |
michael@0 | 399 | // Start hashing. We are always doing SHA256, but depending |
michael@0 | 400 | // on the certificate, a different alogirthm might be needed. |
michael@0 | 401 | nsAutoCString hashString; |
michael@0 | 402 | |
michael@0 | 403 | nsresult rv; |
michael@0 | 404 | nsCOMPtr<nsICryptoHash> crypto; |
michael@0 | 405 | crypto = do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv); |
michael@0 | 406 | if (NS_SUCCEEDED(rv)) |
michael@0 | 407 | rv = crypto->Init(nsICryptoHash::SHA256); |
michael@0 | 408 | if (NS_SUCCEEDED(rv)) |
michael@0 | 409 | rv = crypto->Update((unsigned char*)mCertDERData, mCertDERLength); |
michael@0 | 410 | if (NS_SUCCEEDED(rv)) |
michael@0 | 411 | rv = crypto->Finish(false, hashString); |
michael@0 | 412 | if (NS_FAILED(rv)) { |
michael@0 | 413 | nsMemory::Free(mCertDERData); |
michael@0 | 414 | mCertDERData = nullptr; |
michael@0 | 415 | mCertDERLength = 0; |
michael@0 | 416 | nsMemory::Free(sspi_cbt); |
michael@0 | 417 | return rv; |
michael@0 | 418 | } |
michael@0 | 419 | |
michael@0 | 420 | // Once the hash has been computed, we store it in memory right |
michael@0 | 421 | // after the Endpoint structure and the "tls-server-end-point:" |
michael@0 | 422 | // char array. |
michael@0 | 423 | memcpy(sspi_cbt_ptr, hashString.get(), hash_size); |
michael@0 | 424 | |
michael@0 | 425 | // Free memory used to store the server certificate |
michael@0 | 426 | nsMemory::Free(mCertDERData); |
michael@0 | 427 | mCertDERData = nullptr; |
michael@0 | 428 | mCertDERLength = 0; |
michael@0 | 429 | } // End of CBT computation. |
michael@0 | 430 | |
michael@0 | 431 | // We always need this SECBUFFER. |
michael@0 | 432 | ib[ibd.cBuffers].BufferType = SECBUFFER_TOKEN; |
michael@0 | 433 | ib[ibd.cBuffers].cbBuffer = inTokenLen; |
michael@0 | 434 | ib[ibd.cBuffers].pvBuffer = (void *) inToken; |
michael@0 | 435 | ibd.cBuffers++; |
michael@0 | 436 | ctxIn = &mCtxt; |
michael@0 | 437 | } |
michael@0 | 438 | } else { // First time and without a token (no server certificate) |
michael@0 | 439 | // We are starting a new authentication sequence. If we have already |
michael@0 | 440 | // initialized our security context, then we're in trouble because it |
michael@0 | 441 | // means that the first sequence failed. We need to bail or else we |
michael@0 | 442 | // might end up in an infinite loop. |
michael@0 | 443 | if (mCtxt.dwLower || mCtxt.dwUpper || mCertDERData || mCertDERLength) { |
michael@0 | 444 | LOG(("Cannot restart authentication sequence!")); |
michael@0 | 445 | return NS_ERROR_UNEXPECTED; |
michael@0 | 446 | } |
michael@0 | 447 | ctxIn = nullptr; |
michael@0 | 448 | mIsFirst = false; |
michael@0 | 449 | } |
michael@0 | 450 | |
michael@0 | 451 | obd.ulVersion = SECBUFFER_VERSION; |
michael@0 | 452 | obd.cBuffers = 1; |
michael@0 | 453 | obd.pBuffers = &ob; |
michael@0 | 454 | ob.BufferType = SECBUFFER_TOKEN; |
michael@0 | 455 | ob.cbBuffer = mMaxTokenLen; |
michael@0 | 456 | ob.pvBuffer = nsMemory::Alloc(ob.cbBuffer); |
michael@0 | 457 | if (!ob.pvBuffer){ |
michael@0 | 458 | if (sspi_cbt) |
michael@0 | 459 | nsMemory::Free(sspi_cbt); |
michael@0 | 460 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 461 | } |
michael@0 | 462 | memset(ob.pvBuffer, 0, ob.cbBuffer); |
michael@0 | 463 | |
michael@0 | 464 | NS_ConvertUTF8toUTF16 wSN(mServiceName); |
michael@0 | 465 | SEC_WCHAR *sn = (SEC_WCHAR *) wSN.get(); |
michael@0 | 466 | |
michael@0 | 467 | rc = (sspi->InitializeSecurityContextW)(&mCred, |
michael@0 | 468 | ctxIn, |
michael@0 | 469 | sn, |
michael@0 | 470 | ctxReq, |
michael@0 | 471 | 0, |
michael@0 | 472 | SECURITY_NATIVE_DREP, |
michael@0 | 473 | inToken ? &ibd : nullptr, |
michael@0 | 474 | 0, |
michael@0 | 475 | &mCtxt, |
michael@0 | 476 | &obd, |
michael@0 | 477 | &ctxAttr, |
michael@0 | 478 | &ignored); |
michael@0 | 479 | if (rc == SEC_I_CONTINUE_NEEDED || rc == SEC_E_OK) { |
michael@0 | 480 | |
michael@0 | 481 | #ifdef PR_LOGGING |
michael@0 | 482 | if (rc == SEC_E_OK) |
michael@0 | 483 | LOG(("InitializeSecurityContext: succeeded.\n")); |
michael@0 | 484 | else |
michael@0 | 485 | LOG(("InitializeSecurityContext: continue.\n")); |
michael@0 | 486 | #endif |
michael@0 | 487 | if (sspi_cbt) |
michael@0 | 488 | nsMemory::Free(sspi_cbt); |
michael@0 | 489 | |
michael@0 | 490 | if (!ob.cbBuffer) { |
michael@0 | 491 | nsMemory::Free(ob.pvBuffer); |
michael@0 | 492 | ob.pvBuffer = nullptr; |
michael@0 | 493 | } |
michael@0 | 494 | *outToken = ob.pvBuffer; |
michael@0 | 495 | *outTokenLen = ob.cbBuffer; |
michael@0 | 496 | |
michael@0 | 497 | if (rc == SEC_E_OK) |
michael@0 | 498 | return NS_SUCCESS_AUTH_FINISHED; |
michael@0 | 499 | |
michael@0 | 500 | return NS_OK; |
michael@0 | 501 | } |
michael@0 | 502 | |
michael@0 | 503 | LOG(("InitializeSecurityContext failed [rc=%d:%s]\n", rc, MapErrorCode(rc))); |
michael@0 | 504 | Reset(); |
michael@0 | 505 | nsMemory::Free(ob.pvBuffer); |
michael@0 | 506 | return NS_ERROR_FAILURE; |
michael@0 | 507 | } |
michael@0 | 508 | |
michael@0 | 509 | NS_IMETHODIMP |
michael@0 | 510 | nsAuthSSPI::Unwrap(const void *inToken, |
michael@0 | 511 | uint32_t inTokenLen, |
michael@0 | 512 | void **outToken, |
michael@0 | 513 | uint32_t *outTokenLen) |
michael@0 | 514 | { |
michael@0 | 515 | SECURITY_STATUS rc; |
michael@0 | 516 | SecBufferDesc ibd; |
michael@0 | 517 | SecBuffer ib[2]; |
michael@0 | 518 | |
michael@0 | 519 | ibd.cBuffers = 2; |
michael@0 | 520 | ibd.pBuffers = ib; |
michael@0 | 521 | ibd.ulVersion = SECBUFFER_VERSION; |
michael@0 | 522 | |
michael@0 | 523 | // SSPI Buf |
michael@0 | 524 | ib[0].BufferType = SECBUFFER_STREAM; |
michael@0 | 525 | ib[0].cbBuffer = inTokenLen; |
michael@0 | 526 | ib[0].pvBuffer = nsMemory::Alloc(ib[0].cbBuffer); |
michael@0 | 527 | if (!ib[0].pvBuffer) |
michael@0 | 528 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 529 | |
michael@0 | 530 | memcpy(ib[0].pvBuffer, inToken, inTokenLen); |
michael@0 | 531 | |
michael@0 | 532 | // app data |
michael@0 | 533 | ib[1].BufferType = SECBUFFER_DATA; |
michael@0 | 534 | ib[1].cbBuffer = 0; |
michael@0 | 535 | ib[1].pvBuffer = nullptr; |
michael@0 | 536 | |
michael@0 | 537 | rc = (sspi->DecryptMessage)( |
michael@0 | 538 | &mCtxt, |
michael@0 | 539 | &ibd, |
michael@0 | 540 | 0, // no sequence numbers |
michael@0 | 541 | nullptr |
michael@0 | 542 | ); |
michael@0 | 543 | |
michael@0 | 544 | if (SEC_SUCCESS(rc)) { |
michael@0 | 545 | // check if ib[1].pvBuffer is really just ib[0].pvBuffer, in which |
michael@0 | 546 | // case we can let the caller free it. Otherwise, we need to |
michael@0 | 547 | // clone it, and free the original |
michael@0 | 548 | if (ib[0].pvBuffer == ib[1].pvBuffer) { |
michael@0 | 549 | *outToken = ib[1].pvBuffer; |
michael@0 | 550 | } |
michael@0 | 551 | else { |
michael@0 | 552 | *outToken = nsMemory::Clone(ib[1].pvBuffer, ib[1].cbBuffer); |
michael@0 | 553 | nsMemory::Free(ib[0].pvBuffer); |
michael@0 | 554 | if (!*outToken) |
michael@0 | 555 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 556 | } |
michael@0 | 557 | *outTokenLen = ib[1].cbBuffer; |
michael@0 | 558 | } |
michael@0 | 559 | else |
michael@0 | 560 | nsMemory::Free(ib[0].pvBuffer); |
michael@0 | 561 | |
michael@0 | 562 | if (!SEC_SUCCESS(rc)) |
michael@0 | 563 | return NS_ERROR_FAILURE; |
michael@0 | 564 | |
michael@0 | 565 | return NS_OK; |
michael@0 | 566 | } |
michael@0 | 567 | |
michael@0 | 568 | // utility class used to free memory on exit |
michael@0 | 569 | class secBuffers |
michael@0 | 570 | { |
michael@0 | 571 | public: |
michael@0 | 572 | |
michael@0 | 573 | SecBuffer ib[3]; |
michael@0 | 574 | |
michael@0 | 575 | secBuffers() { memset(&ib, 0, sizeof(ib)); } |
michael@0 | 576 | |
michael@0 | 577 | ~secBuffers() |
michael@0 | 578 | { |
michael@0 | 579 | if (ib[0].pvBuffer) |
michael@0 | 580 | nsMemory::Free(ib[0].pvBuffer); |
michael@0 | 581 | |
michael@0 | 582 | if (ib[1].pvBuffer) |
michael@0 | 583 | nsMemory::Free(ib[1].pvBuffer); |
michael@0 | 584 | |
michael@0 | 585 | if (ib[2].pvBuffer) |
michael@0 | 586 | nsMemory::Free(ib[2].pvBuffer); |
michael@0 | 587 | } |
michael@0 | 588 | }; |
michael@0 | 589 | |
michael@0 | 590 | NS_IMETHODIMP |
michael@0 | 591 | nsAuthSSPI::Wrap(const void *inToken, |
michael@0 | 592 | uint32_t inTokenLen, |
michael@0 | 593 | bool confidential, |
michael@0 | 594 | void **outToken, |
michael@0 | 595 | uint32_t *outTokenLen) |
michael@0 | 596 | { |
michael@0 | 597 | SECURITY_STATUS rc; |
michael@0 | 598 | |
michael@0 | 599 | SecBufferDesc ibd; |
michael@0 | 600 | secBuffers bufs; |
michael@0 | 601 | SecPkgContext_Sizes sizes; |
michael@0 | 602 | |
michael@0 | 603 | rc = (sspi->QueryContextAttributesW)( |
michael@0 | 604 | &mCtxt, |
michael@0 | 605 | SECPKG_ATTR_SIZES, |
michael@0 | 606 | &sizes); |
michael@0 | 607 | |
michael@0 | 608 | if (!SEC_SUCCESS(rc)) |
michael@0 | 609 | return NS_ERROR_FAILURE; |
michael@0 | 610 | |
michael@0 | 611 | ibd.cBuffers = 3; |
michael@0 | 612 | ibd.pBuffers = bufs.ib; |
michael@0 | 613 | ibd.ulVersion = SECBUFFER_VERSION; |
michael@0 | 614 | |
michael@0 | 615 | // SSPI |
michael@0 | 616 | bufs.ib[0].cbBuffer = sizes.cbSecurityTrailer; |
michael@0 | 617 | bufs.ib[0].BufferType = SECBUFFER_TOKEN; |
michael@0 | 618 | bufs.ib[0].pvBuffer = nsMemory::Alloc(sizes.cbSecurityTrailer); |
michael@0 | 619 | |
michael@0 | 620 | if (!bufs.ib[0].pvBuffer) |
michael@0 | 621 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 622 | |
michael@0 | 623 | // APP Data |
michael@0 | 624 | bufs.ib[1].BufferType = SECBUFFER_DATA; |
michael@0 | 625 | bufs.ib[1].pvBuffer = nsMemory::Alloc(inTokenLen); |
michael@0 | 626 | bufs.ib[1].cbBuffer = inTokenLen; |
michael@0 | 627 | |
michael@0 | 628 | if (!bufs.ib[1].pvBuffer) |
michael@0 | 629 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 630 | |
michael@0 | 631 | memcpy(bufs.ib[1].pvBuffer, inToken, inTokenLen); |
michael@0 | 632 | |
michael@0 | 633 | // SSPI |
michael@0 | 634 | bufs.ib[2].BufferType = SECBUFFER_PADDING; |
michael@0 | 635 | bufs.ib[2].cbBuffer = sizes.cbBlockSize; |
michael@0 | 636 | bufs.ib[2].pvBuffer = nsMemory::Alloc(bufs.ib[2].cbBuffer); |
michael@0 | 637 | |
michael@0 | 638 | if (!bufs.ib[2].pvBuffer) |
michael@0 | 639 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 640 | |
michael@0 | 641 | rc = (sspi->EncryptMessage)(&mCtxt, |
michael@0 | 642 | confidential ? 0 : KERB_WRAP_NO_ENCRYPT, |
michael@0 | 643 | &ibd, 0); |
michael@0 | 644 | |
michael@0 | 645 | if (SEC_SUCCESS(rc)) { |
michael@0 | 646 | int len = bufs.ib[0].cbBuffer + bufs.ib[1].cbBuffer + bufs.ib[2].cbBuffer; |
michael@0 | 647 | char *p = (char *) nsMemory::Alloc(len); |
michael@0 | 648 | |
michael@0 | 649 | if (!p) |
michael@0 | 650 | return NS_ERROR_OUT_OF_MEMORY; |
michael@0 | 651 | |
michael@0 | 652 | *outToken = (void *) p; |
michael@0 | 653 | *outTokenLen = len; |
michael@0 | 654 | |
michael@0 | 655 | memcpy(p, bufs.ib[0].pvBuffer, bufs.ib[0].cbBuffer); |
michael@0 | 656 | p += bufs.ib[0].cbBuffer; |
michael@0 | 657 | |
michael@0 | 658 | memcpy(p,bufs.ib[1].pvBuffer, bufs.ib[1].cbBuffer); |
michael@0 | 659 | p += bufs.ib[1].cbBuffer; |
michael@0 | 660 | |
michael@0 | 661 | memcpy(p,bufs.ib[2].pvBuffer, bufs.ib[2].cbBuffer); |
michael@0 | 662 | |
michael@0 | 663 | return NS_OK; |
michael@0 | 664 | } |
michael@0 | 665 | |
michael@0 | 666 | return NS_ERROR_FAILURE; |
michael@0 | 667 | } |