src/security/cert_generators/file/certificate_db.cc

   1 /*
   2  * Copyright (C) 1996-2019 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "base/HardFun.h"
  11 #include "security/cert_generators/file/certificate_db.h"
  12
  13 #include <cerrno>
  14 #include <fstream>
  15 #include <memory>
  16 #include <stdexcept>
  17 #if HAVE_SYS_STAT_H
  18 #include <sys/stat.h>
  19 #endif
  20 #if HAVE_FCNTL_H
  21 #include <fcntl.h>
  22 #endif
  23 #if HAVE_SYS_FILE_H
  24 #include <sys/file.h>
  25 #endif
  26
  27 #define HERE "(security_file_certgen) " << __FILE__ << ':' << __LINE__ << ": "
  28
  29 Ssl::Lock::Lock(std::string const &aFilename) :
  30     filename(aFilename),
  31 #if _SQUID_WINDOWS_
  32     hFile(INVALID_HANDLE_VALUE)
  33 #else
  34     fd(-1)
  35 #endif
  36 {
  37 }
  38
  39 bool Ssl::Lock::locked() const
  40 {
  41 #if _SQUID_WINDOWS_
  42     return hFile != INVALID_HANDLE_VALUE;
  43 #else
  44     return fd != -1;
  45 #endif
  46 }
  47
  48 void Ssl::Lock::lock()
  49 {
  50
  51 #if _SQUID_WINDOWS_
  52     hFile = CreateFile(TEXT(filename.c_str()), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  53     if (hFile == INVALID_HANDLE_VALUE)
  54 #else
  55     fd = open(filename.c_str(), O_RDWR);
  56     if (fd == -1)
  57 #endif
  58         throw std::runtime_error("Failed to open file " + filename);
  59
  60 #if _SQUID_WINDOWS_
  61     if (!LockFile(hFile, 0, 0, 1, 0))
  62 #elif _SQUID_SOLARIS_
  63     if (lockf(fd, F_LOCK, 0) != 0)
  64 #else
  65     if (flock(fd, LOCK_EX) != 0)
  66 #endif
  67         throw std::runtime_error("Failed to get a lock of " + filename);
  68 }
  69
  70 void Ssl::Lock::unlock()
  71 {
  72 #if _SQUID_WINDOWS_
  73     if (hFile != INVALID_HANDLE_VALUE) {
  74         UnlockFile(hFile, 0, 0, 1, 0);
  75         CloseHandle(hFile);
  76         hFile = INVALID_HANDLE_VALUE;
  77     }
  78 #else
  79     if (fd != -1) {
  80 #if _SQUID_SOLARIS_
  81         lockf(fd, F_ULOCK, 0);
  82 #else
  83         flock(fd, LOCK_UN);
  84 #endif
  85         close(fd);
  86         fd = -1;
  87     }
  88 #endif
  89     else
  90         throw std::runtime_error("Lock is already unlocked for " + filename);
  91 }
  92
  93 Ssl::Lock::~Lock()
  94 {
  95     if (locked())
  96         unlock();
  97 }
  98
  99 Ssl::Locker::Locker(Lock &aLock, const char *aFileName, int aLineNo):
 100     weLocked(false), lock(aLock), fileName(aFileName), lineNo(aLineNo)
 101 {
 102     if (!lock.locked()) {
 103         lock.lock();
 104         weLocked = true;
 105     }
 106 }
 107
 108 Ssl::Locker::~Locker()
 109 {
 110     if (weLocked)
 111         lock.unlock();
 112 }
 113
 114 Ssl::CertificateDb::Row::Row()
 115     :   width(cnlNumber)
 116 {
 117     row = (char **)OPENSSL_malloc(sizeof(char *) * (width + 1));
 118     for (size_t i = 0; i < width + 1; ++i)
 119         row[i] = NULL;
 120 }
 121
 122 Ssl::CertificateDb::Row::Row(char **aRow, size_t aWidth): width(aWidth)
 123 {
 124     row = aRow;
 125 }
 126
 127 Ssl::CertificateDb::Row::~Row()
 128 {
 129     if (!row)
 130         return;
 131
 132     void *max;
 133     if ((max = (void *)row[width]) != NULL) {
 134         // It is an openSSL allocated row. The TXT_DB_read function stores the
 135         // index and row items one one memory segment. The row[width] points
 136         // to the end of buffer. We have to check for items in the array which
 137         // are not stored in this segment. These items should released.
 138         for (size_t i = 0; i < width + 1; ++i) {
 139             if (((row[i] < (char *)row) || (row[i] > max)) && (row[i] != NULL))
 140                 OPENSSL_free(row[i]);
 141         }
 142     } else {
 143         for (size_t i = 0; i < width + 1; ++i) {
 144             if (row[i])
 145                 OPENSSL_free(row[i]);
 146         }
 147     }
 148     OPENSSL_free(row);
 149 }
 150
 151 void Ssl::CertificateDb::Row::reset()
 152 {
 153     row = NULL;
 154 }
 155
 156 void Ssl::CertificateDb::Row::setValue(size_t cell, char const * value)
 157 {
 158     assert(cell < width);
 159     if (row[cell]) {
 160         free(row[cell]);
 161     }
 162     if (value) {
 163         row[cell] = static_cast<char *>(OPENSSL_malloc(sizeof(char) * (strlen(value) + 1)));
 164         memcpy(row[cell], value, sizeof(char) * (strlen(value) + 1));
 165     } else
 166         row[cell] = NULL;
 167 }
 168
 169 char ** Ssl::CertificateDb::Row::getRow()
 170 {
 171     return row;
 172 }
 173
 174 void Ssl::CertificateDb::sq_TXT_DB_delete(TXT_DB *db, const char **row)
 175 {
 176     if (!db)
 177         return;
 178
 179 #if SQUID_SSLTXTDB_PSTRINGDATA
 180     for (int i = 0; i < sk_OPENSSL_PSTRING_num(db->data); ++i) {
 181 #if SQUID_STACKOF_PSTRINGDATA_HACK
 182         const char ** current_row = ((const char **)sk_value(CHECKED_STACK_OF(OPENSSL_PSTRING, db->data), i));
 183 #else
 184         const char ** current_row = ((const char **)sk_OPENSSL_PSTRING_value(db->data, i));
 185 #endif
 186 #else
 187     for (int i = 0; i < sk_num(db->data); ++i) {
 188         const char ** current_row = ((const char **)sk_value(db->data, i));
 189 #endif
 190         if (current_row == row) {
 191             sq_TXT_DB_delete_row(db, i);
 192             return;
 193         }
 194     }
 195 }
 196
 197 #define countof(arr) (sizeof(arr)/sizeof(*arr))
 198 void Ssl::CertificateDb::sq_TXT_DB_delete_row(TXT_DB *db, int idx) {
 199     char **rrow;
 200 #if SQUID_SSLTXTDB_PSTRINGDATA
 201     rrow = (char **)sk_OPENSSL_PSTRING_delete(db->data, idx);
 202 #else
 203     rrow = (char **)sk_delete(db->data, idx);
 204 #endif
 205
 206     if (!rrow)
 207         return;
 208
 209     Row row(rrow, cnlNumber); // row wrapper used to free the rrow
 210
 211     const Columns db_indexes[]= {cnlSerial, cnlKey};
 212     for (unsigned int i = 0; i < countof(db_indexes); ++i) {
 213         void *data = NULL;
 214 #if SQUID_SSLTXTDB_PSTRINGDATA
 215         if (LHASH_OF(OPENSSL_STRING) *fieldIndex =  db->index[db_indexes[i]])
 216             data = lh_OPENSSL_STRING_delete(fieldIndex, rrow);
 217 #else
 218         if (LHASH *fieldIndex = db->index[db_indexes[i]])
 219             data = OPENSSL_LH_delete(fieldIndex, rrow);
 220 #endif
 221         if (data)
 222             assert(data == rrow);
 223     }
 224 }
 225
 226 unsigned long Ssl::CertificateDb::index_serial_hash(const char **a) {
 227     const char *n = a[Ssl::CertificateDb::cnlSerial];
 228     while (*n == '0')
 229         ++n;
 230     return OPENSSL_LH_strhash(n);
 231 }
 232
 233 int Ssl::CertificateDb::index_serial_cmp(const char **a, const char **b) {
 234     const char *aa, *bb;
 235     for (aa = a[Ssl::CertificateDb::cnlSerial]; *aa == '0'; ++aa);
 236     for (bb = b[Ssl::CertificateDb::cnlSerial]; *bb == '0'; ++bb);
 237     return strcmp(aa, bb);
 238 }
 239
 240 unsigned long Ssl::CertificateDb::index_name_hash(const char **a) {
 241     return(OPENSSL_LH_strhash(a[Ssl::CertificateDb::cnlKey]));
 242 }
 243
 244 int Ssl::CertificateDb::index_name_cmp(const char **a, const char **b) {
 245     return(strcmp(a[Ssl::CertificateDb::cnlKey], b[CertificateDb::cnlKey]));
 246 }
 247
 248 const std::string Ssl::CertificateDb::db_file("index.txt");
 249 const std::string Ssl::CertificateDb::cert_dir("certs");
 250 const std::string Ssl::CertificateDb::size_file("size");
 251
 252 Ssl::CertificateDb::CertificateDb(std::string const & aDb_path, size_t aMax_db_size, size_t aFs_block_size)
 253     :  db_path(aDb_path),
 254        db_full(aDb_path + "/" + db_file),
 255        cert_full(aDb_path + "/" + cert_dir),
 256        size_full(aDb_path + "/" + size_file),
 257        max_db_size(aMax_db_size),
 258        fs_block_size((aFs_block_size ? aFs_block_size : 2048)),
 259        dbLock(db_full)
 260 {}
 261
 262 bool
 263 Ssl::CertificateDb::find(std::string const &key, const Security::CertPointer &expectedOrig, Security::CertPointer &cert, Security::PrivateKeyPointer &pkey)
 264 {
 265     const Locker locker(dbLock, Here);
 266     load();
 267     return pure_find(key, expectedOrig, cert, pkey);
 268 }
 269
 270 bool Ssl::CertificateDb::purgeCert(std::string const & key) {
 271     const Locker locker(dbLock, Here);
 272     load();
 273     if (!db)
 274         return false;
 275
 276     if (!deleteByKey(key))
 277         return false;
 278
 279     save();
 280     return true;
 281 }
 282
 283 bool
 284 Ssl::CertificateDb::addCertAndPrivateKey(std::string const &useKey, const Security::CertPointer &cert, const Security::PrivateKeyPointer &pkey, const Security::CertPointer &orig)
 285 {
 286     const Locker locker(dbLock, Here);
 287     load();
 288     if (!db || !cert || !pkey)
 289         return false;
 290
 291     if(useKey.empty())
 292         return false;
 293
 294     // Functor to wrap xfree() for std::unique_ptr
 295     typedef HardFun<void, const void*, &xfree> CharDeleter;
 296
 297     Row row;
 298     ASN1_INTEGER * ai = X509_get_serialNumber(cert.get());
 299     std::string serial_string;
 300     Ssl::BIGNUM_Pointer serial(ASN1_INTEGER_to_BN(ai, NULL));
 301     {
 302         std::unique_ptr<char, CharDeleter> hex_bn(BN_bn2hex(serial.get()));
 303         serial_string = std::string(hex_bn.get());
 304     }
 305     row.setValue(cnlSerial, serial_string.c_str());
 306     char ** rrow = TXT_DB_get_by_index(db.get(), cnlSerial, row.getRow());
 307     // We are creating certificates with unique serial numbers. If the serial
 308     // number is found in the database, the same certificate is already stored.
 309     if (rrow != NULL) {
 310         // TODO: check if the stored row is valid.
 311         return true;
 312     }
 313
 314     // Remove any entry with given key
 315     deleteByKey(useKey);
 316
 317     // check db size while trying to minimize calls to size()
 318     size_t dbSize = size();
 319     if ((dbSize == 0 && hasRows()) ||
 320             (dbSize > 0 && !hasRows()) ||
 321             (dbSize >  10 * max_db_size)) {
 322         // Invalid database size, rebuild
 323         dbSize = rebuildSize();
 324     }
 325     while (dbSize > max_db_size && deleteInvalidCertificate()) {
 326         dbSize = size(); // get the current database size
 327         // and try to find another invalid certificate if needed
 328     }
 329     // there are no more invalid ones, but there must be valid certificates
 330     while (dbSize > max_db_size) {
 331         if (!deleteOldestCertificate()) {
 332             rebuildSize(); // No certificates in database.Update the size file.
 333             save(); // Some entries may have been removed. Update the index file.
 334             return false; // errors prevented us from freeing enough space
 335         }
 336         dbSize = size(); // get the current database size
 337     }
 338
 339     const auto tm = X509_getm_notAfter(cert.get());
 340     row.setValue(cnlExp_date, std::string(reinterpret_cast<char *>(tm->data), tm->length).c_str());
 341     std::unique_ptr<char, CharDeleter> subject(X509_NAME_oneline(X509_get_subject_name(cert.get()), nullptr, 0));
 342     row.setValue(cnlName, subject.get());
 343     row.setValue(cnlKey, useKey.c_str());
 344
 345     if (!TXT_DB_insert(db.get(), row.getRow())) {
 346         // failed to add index (???) but we may have already modified
 347         // the database so save before exit
 348         save();
 349         return false;
 350     }
 351     rrow = row.getRow();
 352     row.reset();
 353
 354     std::string filename(cert_full + "/" + serial_string + ".pem");
 355     if (!WriteEntry(filename.c_str(), cert, pkey, orig)) {
 356         //remove row from txt_db and save
 357         sq_TXT_DB_delete(db.get(), (const char **)rrow);
 358         save();
 359         return false;
 360     }
 361     addSize(filename);
 362
 363     save();
 364     return true;
 365 }
 366
 367 void
 368 Ssl::CertificateDb::Create(std::string const & db_path) {
 369     if (db_path == "")
 370         throw std::runtime_error("Path to db is empty");
 371     std::string db_full(db_path + "/" + db_file);
 372     std::string cert_full(db_path + "/" + cert_dir);
 373     std::string size_full(db_path + "/" + size_file);
 374
 375     if (mkdir(db_path.c_str(), 0777))
 376         throw std::runtime_error("Cannot create " + db_path);
 377
 378     if (mkdir(cert_full.c_str(), 0777))
 379         throw std::runtime_error("Cannot create " + cert_full);
 380
 381     std::ofstream size(size_full.c_str());
 382     if (size)
 383         size << 0;
 384     else
 385         throw std::runtime_error("Cannot open " + size_full + " to open");
 386     std::ofstream db(db_full.c_str());
 387     if (!db)
 388         throw std::runtime_error("Cannot open " + db_full + " to open");
 389 }
 390
 391 void
 392 Ssl::CertificateDb::Check(std::string const & db_path, size_t max_db_size, size_t fs_block_size) {
 393     CertificateDb db(db_path, max_db_size, fs_block_size);
 394     db.load();
 395
 396     // Call readSize to force rebuild size file in the case it is corrupted
 397     (void)db.readSize();
 398 }
 399
 400 size_t Ssl::CertificateDb::rebuildSize()
 401 {
 402     size_t dbSize = 0;
 403 #if SQUID_SSLTXTDB_PSTRINGDATA
 404     for (int i = 0; i < sk_OPENSSL_PSTRING_num(db.get()->data); ++i) {
 405 #if SQUID_STACKOF_PSTRINGDATA_HACK
 406         const char ** current_row = ((const char **)sk_value(CHECKED_STACK_OF(OPENSSL_PSTRING, db.get()->data), i));
 407 #else
 408         const char ** current_row = ((const char **)sk_OPENSSL_PSTRING_value(db.get()->data, i));
 409 #endif
 410 #else
 411     for (int i = 0; i < sk_num(db.get()->data); ++i) {
 412         const char ** current_row = ((const char **)sk_value(db.get()->data, i));
 413 #endif
 414         const std::string filename(cert_full + "/" + current_row[cnlSerial] + ".pem");
 415         const size_t fSize = getFileSize(filename);
 416         dbSize += fSize;
 417     }
 418     writeSize(dbSize);
 419     return dbSize;
 420 }
 421
 422 bool
 423 Ssl::CertificateDb::pure_find(std::string const &key, const Security::CertPointer &expectedOrig, Security::CertPointer &cert, Security::PrivateKeyPointer &pkey)
 424 {
 425     if (!db)
 426         return false;
 427
 428     Row row;
 429     row.setValue(cnlKey, key.c_str());
 430
 431     char **rrow = TXT_DB_get_by_index(db.get(), cnlKey, row.getRow());
 432     if (rrow == NULL)
 433         return false;
 434
 435     if (!sslDateIsInTheFuture(rrow[cnlExp_date]))
 436         return false;
 437
 438     Security::CertPointer storedOrig;
 439     // read cert and pkey from file.
 440     std::string filename(cert_full + "/" + rrow[cnlSerial] + ".pem");
 441     if (!ReadEntry(filename.c_str(), cert, pkey, storedOrig))
 442         return false;
 443
 444     if (!storedOrig && !expectedOrig)
 445         return true;
 446     else
 447         return Ssl::CertificatesCmp(expectedOrig, storedOrig);
 448 }
 449
 450 size_t Ssl::CertificateDb::size() {
 451     return readSize();
 452 }
 453
 454 void Ssl::CertificateDb::addSize(std::string const & filename) {
 455     // readSize will rebuild 'size' file if missing or it is corrupted
 456     size_t dbSize = readSize();
 457     dbSize += getFileSize(filename);
 458     writeSize(dbSize);
 459 }
 460
 461 void Ssl::CertificateDb::subSize(std::string const & filename) {
 462     // readSize will rebuild 'size' file if missing or it is corrupted
 463     size_t dbSize = readSize();
 464     const size_t fileSize = getFileSize(filename);
 465     dbSize = dbSize > fileSize ? dbSize - fileSize : 0;
 466     writeSize(dbSize);
 467 }
 468
 469 size_t Ssl::CertificateDb::readSize() {
 470     std::ifstream ifstr(size_full.c_str());
 471     size_t db_size = 0;
 472     if (!ifstr || !(ifstr >> db_size))
 473         return rebuildSize();
 474     return db_size;
 475 }
 476
 477 void Ssl::CertificateDb::writeSize(size_t db_size) {
 478     std::ofstream ofstr(size_full.c_str());
 479     if (!ofstr)
 480         throw std::runtime_error("cannot write \"" + size_full + "\" file");
 481     ofstr << db_size;
 482 }
 483
 484 size_t Ssl::CertificateDb::getFileSize(std::string const & filename) {
 485     std::ifstream file(filename.c_str(), std::ios::binary);
 486     if (!file)
 487         return 0;
 488     file.seekg(0, std::ios_base::end);
 489     const std::streampos file_size = file.tellg();
 490     if (file_size < 0)
 491         return 0;
 492     return ((static_cast<size_t>(file_size) + fs_block_size - 1) / fs_block_size) * fs_block_size;
 493 }
 494
 495 void Ssl::CertificateDb::load() {
 496     // Load db from file.
 497     Ssl::BIO_Pointer in(BIO_new(BIO_s_file()));
 498     if (!in || BIO_read_filename(in.get(), db_full.c_str()) <= 0)
 499         throw std::runtime_error("Uninitialized SSL certificate database directory: " + db_path + ". To initialize, run \"security_file_certgen -c -s " + db_path + "\".");
 500
 501     bool corrupt = false;
 502     Ssl::TXT_DB_Pointer temp_db(TXT_DB_read(in.get(), cnlNumber));
 503     if (!temp_db)
 504         corrupt = true;
 505
 506     // Create indexes in db.
 507     if (!corrupt && !TXT_DB_create_index(temp_db.get(), cnlSerial, NULL, LHASH_HASH_FN(index_serial_hash), LHASH_COMP_FN(index_serial_cmp)))
 508         corrupt = true;
 509
 510     if (!corrupt && !TXT_DB_create_index(temp_db.get(), cnlKey, NULL, LHASH_HASH_FN(index_name_hash), LHASH_COMP_FN(index_name_cmp)))
 511         corrupt = true;
 512
 513     if (corrupt)
 514         throw std::runtime_error("The SSL certificate database " + db_path + " is corrupted. Please rebuild");
 515
 516     db.reset(temp_db.release());
 517 }
 518
 519 void Ssl::CertificateDb::save() {
 520     if (!db)
 521         throw std::runtime_error("The certificates database is not loaded");;
 522
 523     // To save the db to file,  create a new BIO with BIO file methods.
 524     Ssl::BIO_Pointer out(BIO_new(BIO_s_file()));
 525     if (!out || !BIO_write_filename(out.get(), const_cast<char *>(db_full.c_str())))
 526         throw std::runtime_error("Failed to initialize " + db_full + " file for writing");;
 527
 528     if (TXT_DB_write(out.get(), db.get()) < 0)
 529         throw std::runtime_error("Failed to write " + db_full + " file");
 530 }
 531
 532 // Normally defined in defines.h file
 533 void Ssl::CertificateDb::deleteRow(const char **row, int rowIndex) {
 534     const std::string filename(cert_full + "/" + row[cnlSerial] + ".pem");
 535     sq_TXT_DB_delete_row(db.get(), rowIndex);
 536
 537     subSize(filename);
 538     int ret = remove(filename.c_str());
 539     if (ret < 0 && errno != ENOENT)
 540         throw std::runtime_error("Failed to remove certficate file " + filename + " from db");
 541 }
 542
 543 bool Ssl::CertificateDb::deleteInvalidCertificate() {
 544     if (!db)
 545         return false;
 546
 547     bool removed_one = false;
 548 #if SQUID_SSLTXTDB_PSTRINGDATA
 549     for (int i = 0; i < sk_OPENSSL_PSTRING_num(db.get()->data); ++i) {
 550 #if SQUID_STACKOF_PSTRINGDATA_HACK
 551         const char ** current_row = ((const char **)sk_value(CHECKED_STACK_OF(OPENSSL_PSTRING, db.get()->data), i));
 552 #else
 553         const char ** current_row = ((const char **)sk_OPENSSL_PSTRING_value(db.get()->data, i));
 554 #endif
 555 #else
 556     for (int i = 0; i < sk_num(db.get()->data); ++i) {
 557         const char ** current_row = ((const char **)sk_value(db.get()->data, i));
 558 #endif
 559
 560         if (!sslDateIsInTheFuture(current_row[cnlExp_date])) {
 561             deleteRow(current_row, i);
 562             removed_one = true;
 563             break;
 564         }
 565     }
 566
 567     if (!removed_one)
 568         return false;
 569     return true;
 570 }
 571
 572 bool Ssl::CertificateDb::deleteOldestCertificate()
 573 {
 574     if (!hasRows())
 575         return false;
 576
 577 #if SQUID_SSLTXTDB_PSTRINGDATA
 578 #if SQUID_STACKOF_PSTRINGDATA_HACK
 579     const char **row = ((const char **)sk_value(CHECKED_STACK_OF(OPENSSL_PSTRING, db.get()->data), 0));
 580 #else
 581     const char **row = (const char **)sk_OPENSSL_PSTRING_value(db.get()->data, 0);
 582 #endif
 583 #else
 584     const char **row = (const char **)sk_value(db.get()->data, 0);
 585 #endif
 586
 587     deleteRow(row, 0);
 588
 589     return true;
 590 }
 591
 592 bool
 593 Ssl::CertificateDb::deleteByKey(std::string const & key) {
 594     if (!db)
 595         return false;
 596
 597 #if SQUID_SSLTXTDB_PSTRINGDATA
 598     for (int i = 0; i < sk_OPENSSL_PSTRING_num(db.get()->data); ++i) {
 599 #if SQUID_STACKOF_PSTRINGDATA_HACK
 600         const char ** current_row = ((const char **)sk_value(CHECKED_STACK_OF(OPENSSL_PSTRING, db.get()->data), i));
 601 #else
 602         const char ** current_row = ((const char **)sk_OPENSSL_PSTRING_value(db.get()->data, i));
 603 #endif
 604 #else
 605     for (int i = 0; i < sk_num(db.get()->data); ++i) {
 606         const char ** current_row = ((const char **)sk_value(db.get()->data, i));
 607 #endif
 608         if (key == current_row[cnlKey]) {
 609             deleteRow(current_row, i);
 610             return true;
 611         }
 612     }
 613     return false;
 614 }
 615
 616 bool Ssl::CertificateDb::hasRows() const
 617 {
 618     if (!db)
 619         return false;
 620
 621 #if SQUID_SSLTXTDB_PSTRINGDATA
 622     if (sk_OPENSSL_PSTRING_num(db.get()->data) == 0)
 623 #else
 624     if (sk_num(db.get()->data) == 0)
 625 #endif
 626         return false;
 627     return true;
 628 }
 629
 630 bool
 631 Ssl::CertificateDb::WriteEntry(const std::string &filename, const Security::CertPointer &cert, const Security::PrivateKeyPointer &pkey, const Security::CertPointer &orig)
 632 {
 633     Ssl::BIO_Pointer bio;
 634     if (!Ssl::OpenCertsFileForWriting(bio, filename.c_str()))
 635         return false;
 636     if (!Ssl::WriteX509Certificate(bio, cert))
 637         return false;
 638     if (!Ssl::WritePrivateKey(bio, pkey))
 639         return false;
 640     if (orig && !Ssl::WriteX509Certificate(bio, orig))
 641         return false;
 642     return true;
 643 }
 644
 645 bool
 646 Ssl::CertificateDb::ReadEntry(std::string filename, Security::CertPointer &cert, Security::PrivateKeyPointer &pkey, Security::CertPointer &orig)
 647 {
 648     Ssl::BIO_Pointer bio;
 649     if (!Ssl::OpenCertsFileForReading(bio, filename.c_str()))
 650         return false;
 651     if (!Ssl::ReadX509Certificate(bio, cert))
 652         return false;
 653     if (!Ssl::ReadPrivateKey(bio, pkey, NULL))
 654         return false;
 655     // The orig certificate is not mandatory
 656     (void)Ssl::ReadX509Certificate(bio, orig);
 657     return true;
 658 }
 659