Mercurial > hg > orthanc
annotate OrthancFramework/Sources/Compression/ZipReader.cpp @ 5115:0a9d36187a91
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| author | Alain Mazy <am@osimis.io> |
|---|---|
| date | Fri, 02 Dec 2022 15:05:33 +0100 |
| parents | 43e613a7756b |
| children | 0ea402b4d901 |
| rev | line source |
|---|---|
| 4355 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 4355 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
| 9 * modify it under the terms of the GNU Lesser General Public License | |
| 10 * as published by the Free Software Foundation, either version 3 of | |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * Lesser General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU Lesser General Public | |
| 19 * License along with this program. If not, see | |
| 20 * <http://www.gnu.org/licenses/>. | |
| 21 **/ | |
| 22 | |
| 23 | |
| 24 #include "../PrecompiledHeaders.h" | |
| 25 | |
| 26 #ifndef NOMINMAX | |
| 27 #define NOMINMAX | |
| 28 #endif | |
| 29 | |
| 30 #include "ZipReader.h" | |
| 31 | |
| 32 #include "../OrthancException.h" | |
| 33 #include "../../Resources/ThirdParty/minizip/unzip.h" | |
| 34 | |
| 35 #if ORTHANC_SANDBOXED != 1 | |
| 36 # include "../SystemToolbox.h" | |
| 37 #endif | |
| 38 | |
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39 |
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40 /** |
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41 * I have not been able to correctly define "ssize_t" on all versions |
| 4751 | 42 * of Visual Studio. As a consequence, I preferred to switch "ssize_t" |
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43 * to "SSIZE_T", that is properly defined on both MSVC 2008 and 2015. |
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44 * I define the macro "SSIZE_T" as an alias to "ssize_t" on |
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45 * POSIX-compliant platforms that wouldn't have "SSIZE_T" defined. |
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46 **/ |
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47 #if defined(_MSC_VER) |
| 4360 | 48 # include <BaseTsd.h> // Definition of SSIZE_T |
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49 #else |
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50 # if !defined(SSIZE_T) |
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51 typedef ssize_t SSIZE_T; |
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52 # endif |
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53 #endif |
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54 |
| 4355 | 55 #include <string.h> |
| 56 | |
| 57 | |
| 58 namespace Orthanc | |
| 59 { | |
| 60 // ZPOS64_T corresponds to "uint64_t" | |
| 61 | |
| 62 class ZipReader::MemoryBuffer : public boost::noncopyable | |
| 63 { | |
| 64 private: | |
| 65 const uint8_t* content_; | |
| 66 size_t size_; | |
| 67 size_t pos_; | |
| 68 | |
| 69 public: | |
| 70 MemoryBuffer(const void* p, | |
| 71 size_t size) : | |
| 72 content_(reinterpret_cast<const uint8_t*>(p)), | |
| 73 size_(size), | |
| 74 pos_(0) | |
| 75 { | |
| 76 } | |
| 77 | |
| 4356 | 78 explicit MemoryBuffer(const std::string& s) : |
| 4355 | 79 content_(s.empty() ? NULL : reinterpret_cast<const uint8_t*>(s.c_str())), |
| 80 size_(s.size()), | |
| 81 pos_(0) | |
| 82 { | |
| 83 } | |
| 84 | |
| 85 // Returns the number of bytes actually read | |
| 86 uLong Read(void *target, | |
| 87 uLong size) | |
| 88 { | |
| 89 if (size <= 0) | |
| 90 { | |
| 91 return 0; | |
| 92 } | |
| 93 else | |
| 94 { | |
| 95 size_t s = static_cast<size_t>(size); | |
| 96 if (s + pos_ > size_) | |
| 97 { | |
| 98 s = size_ - pos_; | |
| 99 } | |
| 100 | |
| 101 if (s != 0) | |
| 102 { | |
| 103 memcpy(target, content_ + pos_, s); | |
| 104 } | |
| 105 | |
| 106 pos_ += s; | |
| 4360 | 107 return static_cast<uLong>(s); |
| 4355 | 108 } |
| 109 } | |
| 110 | |
| 111 ZPOS64_T Tell() const | |
| 112 { | |
| 113 return static_cast<ZPOS64_T>(pos_); | |
| 114 } | |
| 115 | |
| 116 long Seek(ZPOS64_T offset, | |
| 117 int origin) | |
| 118 { | |
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119 SSIZE_T next; |
| 4355 | 120 |
| 121 switch (origin) | |
| 122 { | |
| 123 case ZLIB_FILEFUNC_SEEK_CUR: | |
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124 next = static_cast<SSIZE_T>(offset) + static_cast<SSIZE_T>(pos_); |
| 4355 | 125 break; |
| 126 | |
| 127 case ZLIB_FILEFUNC_SEEK_SET: | |
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128 next = static_cast<SSIZE_T>(offset); |
| 4355 | 129 break; |
| 130 | |
| 131 case ZLIB_FILEFUNC_SEEK_END: | |
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132 next = static_cast<SSIZE_T>(offset) + static_cast<SSIZE_T>(size_); |
| 4355 | 133 break; |
| 134 | |
| 135 default: // Should never occur | |
| 136 return 1; // Error | |
| 137 } | |
| 138 | |
| 139 if (next < 0) | |
| 140 { | |
| 141 pos_ = 0; | |
| 142 } | |
| 143 else if (next >= static_cast<long>(size_)) | |
| 144 { | |
| 145 pos_ = size_; | |
| 146 } | |
| 147 else | |
| 148 { | |
| 149 pos_ = static_cast<long>(next); | |
| 150 } | |
| 151 | |
| 152 return 0; | |
| 153 } | |
| 154 | |
| 155 | |
| 156 static voidpf OpenWrapper(voidpf opaque, | |
| 157 const void* filename, | |
| 158 int mode) | |
| 159 { | |
| 160 // Don't return NULL to make "unzip.c" happy | |
| 161 return opaque; | |
| 162 } | |
| 163 | |
| 164 static uLong ReadWrapper(voidpf opaque, | |
| 165 voidpf stream, | |
| 166 void* buf, | |
| 167 uLong size) | |
| 168 { | |
| 169 assert(opaque != NULL); | |
| 170 return reinterpret_cast<MemoryBuffer*>(opaque)->Read(buf, size); | |
| 171 } | |
| 172 | |
| 173 static ZPOS64_T TellWrapper(voidpf opaque, | |
| 174 voidpf stream) | |
| 175 { | |
| 176 assert(opaque != NULL); | |
| 177 return reinterpret_cast<MemoryBuffer*>(opaque)->Tell(); | |
| 178 } | |
| 179 | |
| 180 static long SeekWrapper(voidpf opaque, | |
| 181 voidpf stream, | |
| 182 ZPOS64_T offset, | |
| 183 int origin) | |
| 184 { | |
| 185 assert(opaque != NULL); | |
| 186 return reinterpret_cast<MemoryBuffer*>(opaque)->Seek(offset, origin); | |
| 187 } | |
| 188 | |
| 189 static int CloseWrapper(voidpf opaque, | |
| 190 voidpf stream) | |
| 191 { | |
| 192 return 0; | |
| 193 } | |
| 194 | |
| 195 static int TestErrorWrapper(voidpf opaque, | |
| 196 voidpf stream) | |
| 197 { | |
| 198 return 0; // ?? | |
| 199 } | |
| 200 }; | |
| 201 | |
| 202 | |
| 203 | |
| 204 ZipReader* ZipReader::CreateFromMemory(const std::string& buffer) | |
| 205 { | |
| 206 if (buffer.empty()) | |
| 207 { | |
| 208 return CreateFromMemory(NULL, 0); | |
| 209 } | |
| 210 else | |
| 211 { | |
| 212 return CreateFromMemory(buffer.c_str(), buffer.size()); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 | |
| 217 bool ZipReader::IsZipMemoryBuffer(const void* buffer, | |
| 218 size_t size) | |
| 219 { | |
| 220 if (size < 4) | |
| 221 { | |
| 222 return false; | |
| 223 } | |
| 224 else | |
| 225 { | |
| 226 const uint8_t* c = reinterpret_cast<const uint8_t*>(buffer); | |
| 227 return (c[0] == 0x50 && // 'P' | |
| 228 c[1] == 0x4b && // 'K' | |
| 229 ((c[2] == 0x03 && c[3] == 0x04) || | |
| 230 (c[2] == 0x05 && c[3] == 0x06) || | |
| 231 (c[2] == 0x07 && c[3] == 0x08))); | |
| 232 } | |
| 233 } | |
| 234 | |
| 235 | |
| 236 bool ZipReader::IsZipMemoryBuffer(const std::string& content) | |
| 237 { | |
| 238 if (content.empty()) | |
| 239 { | |
| 240 return false; | |
| 241 } | |
| 242 else | |
| 243 { | |
| 244 return IsZipMemoryBuffer(content.c_str(), content.size()); | |
| 245 } | |
| 246 } | |
| 247 | |
| 248 | |
| 249 #if ORTHANC_SANDBOXED != 1 | |
| 250 bool ZipReader::IsZipFile(const std::string& path) | |
| 251 { | |
| 252 std::string content; | |
| 253 SystemToolbox::ReadFileRange(content, path, 0, 4, | |
| 254 false /* don't throw if file is too small */); | |
| 255 | |
| 256 return IsZipMemoryBuffer(content); | |
| 257 } | |
| 258 #endif | |
| 259 | |
| 260 | |
| 261 struct ZipReader::PImpl | |
| 262 { | |
| 263 unzFile unzip_; | |
| 264 std::unique_ptr<MemoryBuffer> reader_; | |
| 265 bool done_; | |
| 266 | |
| 267 PImpl() : | |
| 268 unzip_(NULL), | |
| 269 done_(true) | |
| 270 { | |
| 271 } | |
| 272 }; | |
| 273 | |
| 274 | |
| 275 ZipReader::ZipReader() : | |
| 276 pimpl_(new PImpl) | |
| 277 { | |
| 278 } | |
| 279 | |
| 280 | |
| 281 ZipReader::~ZipReader() | |
| 282 { | |
| 283 if (pimpl_->unzip_ != NULL) | |
| 284 { | |
| 285 unzClose(pimpl_->unzip_); | |
| 286 pimpl_->unzip_ = NULL; | |
| 287 } | |
| 288 } | |
| 289 | |
| 290 | |
| 291 uint64_t ZipReader::GetFilesCount() const | |
| 292 { | |
| 293 assert(pimpl_->unzip_ != NULL); | |
| 294 | |
| 295 unz_global_info64_s info; | |
| 296 | |
| 297 if (unzGetGlobalInfo64(pimpl_->unzip_, &info) == 0) | |
| 298 { | |
| 299 return info.number_entry; | |
| 300 } | |
| 301 else | |
| 302 { | |
| 303 throw OrthancException(ErrorCode_BadFileFormat); | |
| 304 } | |
| 305 } | |
| 306 | |
| 307 | |
| 308 void ZipReader::SeekFirst() | |
| 309 { | |
| 310 assert(pimpl_->unzip_ != NULL); | |
| 311 pimpl_->done_ = (unzGoToFirstFile(pimpl_->unzip_) != 0); | |
| 312 } | |
| 313 | |
| 314 | |
| 315 bool ZipReader::ReadNextFile(std::string& filename, | |
| 316 std::string& content) | |
| 317 { | |
| 318 assert(pimpl_->unzip_ != NULL); | |
| 319 | |
| 320 if (pimpl_->done_) | |
| 321 { | |
| 322 return false; | |
| 323 } | |
| 324 else | |
| 325 { | |
| 326 unz_file_info64_s info; | |
| 327 if (unzGetCurrentFileInfo64(pimpl_->unzip_, &info, NULL, 0, NULL, 0, NULL, 0) != 0) | |
| 328 { | |
| 329 throw OrthancException(ErrorCode_BadFileFormat); | |
| 330 } | |
| 331 | |
| 332 filename.resize(info.size_filename); | |
| 333 if (!filename.empty() && | |
| 4360 | 334 unzGetCurrentFileInfo64(pimpl_->unzip_, &info, &filename[0], |
| 335 static_cast<uLong>(filename.size()), NULL, 0, NULL, 0) != 0) | |
| 4355 | 336 { |
| 337 throw OrthancException(ErrorCode_BadFileFormat); | |
| 338 } | |
| 339 | |
| 340 content.resize(info.uncompressed_size); | |
| 341 | |
| 342 if (!content.empty()) | |
| 343 { | |
| 344 if (unzOpenCurrentFile(pimpl_->unzip_) == 0) | |
| 345 { | |
| 4360 | 346 bool success = (unzReadCurrentFile(pimpl_->unzip_, &content[0], |
| 347 static_cast<uLong>(content.size())) != 0); | |
| 4355 | 348 |
| 349 if (unzCloseCurrentFile(pimpl_->unzip_) != 0 || | |
| 350 !success) | |
| 351 { | |
| 352 throw OrthancException(ErrorCode_BadFileFormat); | |
| 353 } | |
| 354 } | |
| 355 else | |
| 356 { | |
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357 throw OrthancException(ErrorCode_BadFileFormat, "Invalid file or unsupported compression method (e.g. Deflate64)"); |
| 4355 | 358 } |
| 359 } | |
| 360 | |
| 361 pimpl_->done_ = (unzGoToNextFile(pimpl_->unzip_) != 0); | |
| 362 | |
| 363 return true; | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 | |
| 368 ZipReader* ZipReader::CreateFromMemory(const void* buffer, | |
| 369 size_t size) | |
| 370 { | |
| 371 if (!IsZipMemoryBuffer(buffer, size)) | |
| 372 { | |
| 373 throw OrthancException(ErrorCode_BadFileFormat, "The memory buffer doesn't contain a ZIP archive"); | |
| 374 } | |
| 375 else | |
| 376 { | |
| 377 std::unique_ptr<ZipReader> reader(new ZipReader); | |
| 378 | |
| 379 reader->pimpl_->reader_.reset(new MemoryBuffer(buffer, size)); | |
| 380 if (reader->pimpl_->reader_.get() == NULL) | |
| 381 { | |
| 382 throw OrthancException(ErrorCode_InternalError); | |
| 383 } | |
| 384 | |
| 385 zlib_filefunc64_def funcs; | |
| 386 memset(&funcs, 0, sizeof(funcs)); | |
| 387 | |
| 388 funcs.opaque = reader->pimpl_->reader_.get(); | |
| 389 funcs.zopen64_file = MemoryBuffer::OpenWrapper; | |
| 390 funcs.zread_file = MemoryBuffer::ReadWrapper; | |
| 391 funcs.ztell64_file = MemoryBuffer::TellWrapper; | |
| 392 funcs.zseek64_file = MemoryBuffer::SeekWrapper; | |
| 393 funcs.zclose_file = MemoryBuffer::CloseWrapper; | |
| 394 funcs.zerror_file = MemoryBuffer::TestErrorWrapper; | |
| 395 | |
| 396 reader->pimpl_->unzip_ = unzOpen2_64(NULL, &funcs); | |
| 397 if (reader->pimpl_->unzip_ == NULL) | |
| 398 { | |
| 399 throw OrthancException(ErrorCode_BadFileFormat, "Cannot open ZIP archive from memory buffer"); | |
| 400 } | |
| 401 else | |
| 402 { | |
| 403 reader->SeekFirst(); | |
| 404 return reader.release(); | |
| 405 } | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 | |
| 410 #if ORTHANC_SANDBOXED != 1 | |
| 411 ZipReader* ZipReader::CreateFromFile(const std::string& path) | |
| 412 { | |
| 413 if (!IsZipFile(path)) | |
| 414 { | |
| 415 throw OrthancException(ErrorCode_BadFileFormat, "The file doesn't contain a ZIP archive: " + path); | |
| 416 } | |
| 417 else | |
| 418 { | |
| 419 std::unique_ptr<ZipReader> reader(new ZipReader); | |
| 420 | |
| 421 reader->pimpl_->unzip_ = unzOpen64(path.c_str()); | |
| 422 if (reader->pimpl_->unzip_ == NULL) | |
| 423 { | |
| 424 throw OrthancException(ErrorCode_BadFileFormat, "Cannot open ZIP archive from file: " + path); | |
| 425 } | |
| 426 else | |
| 427 { | |
| 428 reader->SeekFirst(); | |
| 429 return reader.release(); | |
| 430 } | |
| 431 } | |
| 432 } | |
| 433 #endif | |
| 434 } |