| /* |
| Copyright (C) 2006-2008 Werner Dittmann |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * Authors: Werner Dittmann <Werner.Dittmann@t-online.de> |
| */ |
| // #define UNIT_TEST |
| |
| #include <string> |
| #include <time.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include <libzrtpcpp/ZIDFile.h> |
| |
| |
| static ZIDFile* instance; |
| static int errors = 0; // maybe we will use as member of ZIDFile later... |
| |
| void ZIDFile::createZIDFile(char* name) { |
| zidFile = fopen(name, "wb+"); |
| // New file, generate an associated random ZID and save |
| // it as first record |
| if (zidFile != NULL) { |
| unsigned int* ip; |
| ip = (unsigned int*) associatedZid; |
| srand(time(NULL)); |
| *ip++ = rand(); |
| *ip++ = rand(); |
| *ip = rand(); |
| |
| ZIDRecord rec(associatedZid); |
| rec.setOwnZIDRecord(); |
| fseek(zidFile, 0L, SEEK_SET); |
| if (fwrite(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) < 1) |
| ++errors; |
| fflush(zidFile); |
| } |
| } |
| |
| /** |
| * Migrate old ZID file format to new one. |
| * |
| * If ZID file is old format: |
| * - close it, rename it, then re-open |
| * - create ZID file for new format |
| * - copy over contents and flags. |
| */ |
| void ZIDFile::checkDoMigration(char* name) { |
| FILE* fdOld; |
| unsigned char inb[2]; |
| zidrecord1_t recOld; |
| |
| fseek(zidFile, 0L, SEEK_SET); |
| if (fread(inb, 2, 1, zidFile) < 1) { |
| ++errors; |
| inb[0] = 0; |
| } |
| |
| if (inb[0] > 0) { // if it's new format just return |
| return; |
| } |
| fclose(zidFile); // close old ZID file |
| zidFile = NULL; |
| |
| // create save file name, rename and re-open |
| // if rename fails, just unlink old ZID file and create a brand new file |
| // just a little inconvenience for the user, need to verify new SAS |
| std::string fn = std::string(name) + std::string(".save"); |
| if (rename(name, fn.c_str()) < 0) { |
| unlink(name); |
| createZIDFile(name); |
| return; |
| } |
| fdOld = fopen(fn.c_str(), "rb"); // reopen old format in read only mode |
| |
| // Get first record from old file - is the own ZID |
| fseek(fdOld, 0L, SEEK_SET); |
| if (fread(&recOld, sizeof(zidrecord1_t), 1, fdOld) != 1) { |
| fclose(fdOld); |
| return; |
| } |
| if (recOld.ownZid != 1) { |
| fclose(fdOld); |
| return; |
| } |
| zidFile = fopen(name, "wb+"); // create new format file in binary r/w mode |
| if (zidFile == NULL) { |
| return; |
| } |
| // create ZIDRecord in new format, copy over own ZID and write the record |
| ZIDRecord rec(recOld.identifier); |
| rec.setOwnZIDRecord(); |
| if (fwrite(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) < 1) |
| ++errors; |
| |
| // now copy over all valid records from old ZID file format. |
| // Sequentially read old records, sequentially write new records |
| int numRead; |
| do { |
| numRead = fread(&recOld, sizeof(zidrecord1_t), 1, fdOld); |
| if (numRead == 0) { // all old records processed |
| break; |
| } |
| // skip own ZID record and invalid records |
| if (recOld.ownZid == 1 || recOld.recValid == 0) { |
| continue; |
| } |
| ZIDRecord rec2(recOld.identifier); |
| rec2.setValid(); |
| if (recOld.rs1Valid & SASVerified) { |
| rec2.setSasVerified(); |
| } |
| rec2.setNewRs1(recOld.rs2Data); |
| rec2.setNewRs1(recOld.rs1Data); |
| if (fwrite(rec2.getRecordData(), rec2.getRecordLength(), 1, zidFile) < 1) |
| ++errors; |
| |
| } while (numRead == 1); |
| fflush(zidFile); |
| } |
| |
| ZIDFile::~ZIDFile() { |
| close(); |
| } |
| |
| ZIDFile* ZIDFile::getInstance() { |
| |
| if (instance == NULL) { |
| instance = new ZIDFile(); |
| } |
| return instance; |
| } |
| |
| int ZIDFile::open(char* name) { |
| |
| // check for an already active ZID file |
| if (zidFile != NULL) { |
| return 0; |
| } |
| if ((zidFile = fopen(name, "rb+")) == NULL) { |
| createZIDFile(name); |
| } else { |
| checkDoMigration(name); |
| if (zidFile != NULL) { |
| ZIDRecord rec; |
| fseek(zidFile, 0L, SEEK_SET); |
| if (fread(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) != 1) { |
| fclose(zidFile); |
| zidFile = NULL; |
| return -1; |
| } |
| if (!rec.isOwnZIDRecord()) { |
| fclose(zidFile); |
| zidFile = NULL; |
| return -1; |
| } |
| memcpy(associatedZid, rec.getIdentifier(), IDENTIFIER_LEN); |
| } |
| } |
| return ((zidFile == NULL) ? -1 : 1); |
| } |
| |
| void ZIDFile::close() { |
| |
| if (zidFile != NULL) { |
| fclose(zidFile); |
| zidFile = NULL; |
| } |
| } |
| |
| unsigned int ZIDFile::getRecord(ZIDRecord* zidRecord) { |
| unsigned long pos; |
| ZIDRecord rec; |
| int numRead; |
| |
| // set read pointer behind first record ( |
| fseek(zidFile, rec.getRecordLength(), SEEK_SET); |
| |
| do { |
| pos = ftell(zidFile); |
| numRead = fread(rec.getRecordData(), rec.getRecordLength(), 1, zidFile); |
| if (numRead == 0) { |
| break; |
| } |
| |
| // skip own ZID record and invalid records |
| if (rec.isOwnZIDRecord() || !rec.isValid()) { |
| continue; |
| } |
| |
| } while (numRead == 1 && |
| memcmp(zidRecord->getIdentifier(), rec.getIdentifier(), IDENTIFIER_LEN) != 0); |
| |
| // If we reached end of file, then no record with the ZID |
| // found. We need to create a new ZID record. |
| if (numRead == 0) { |
| // create new record |
| ZIDRecord rec1(zidRecord->getIdentifier()); |
| rec1.setValid(); |
| if (fwrite(rec1.getRecordData(), rec1.getRecordLength(), 1, zidFile) < 1) |
| ++errors; |
| memcpy(zidRecord->getRecordData(), rec1.getRecordData(), rec1.getRecordLength()); |
| } else { |
| // Copy the read data into caller's the record storage |
| memcpy(zidRecord->getRecordData(), rec.getRecordData(), rec.getRecordLength()); |
| } |
| |
| // remember position of record in file for save operation |
| zidRecord->setPosition(pos); |
| return 1; |
| } |
| |
| unsigned int ZIDFile::saveRecord(ZIDRecord *zidRecord) { |
| |
| fseek(zidFile, zidRecord->getPosition(), SEEK_SET); |
| if (fwrite(zidRecord->getRecordData(), zidRecord->getRecordLength(), 1, zidFile) < 1) |
| ++errors; |
| fflush(zidFile); |
| return 1; |
| } |
| |
| |
| #ifdef UNIT_TEST |
| |
| #include <iostream> |
| #include <unistd.h> |
| using namespace std; |
| |
| static void hexdump(const char* title, const unsigned char *s, int l) { |
| int n=0; |
| |
| if (s == NULL) return; |
| |
| fprintf(stderr, "%s",title); |
| for (; n < l ; ++n) { |
| if ((n%16) == 0) |
| fprintf(stderr, "\n%04x",n); |
| fprintf(stderr, " %02x",s[n]); |
| } |
| fprintf(stderr, "\n"); |
| } |
| |
| int main(int argc, char *argv[]) { |
| |
| unsigned char myId[IDENTIFIER_LEN]; |
| ZIDFile *zid = ZIDFile::getInstance(); |
| |
| unlink("testzid2"); |
| zid->open("testzid2"); |
| hexdump("My ZID: ", zid->getZid(), IDENTIFIER_LEN); |
| memcpy(myId, zid->getZid(), IDENTIFIER_LEN); |
| zid->close(); |
| |
| zid->open("testzid2"); |
| if (memcmp(myId, zid->getZid(), IDENTIFIER_LEN) != 0) { |
| cerr << "Wrong ZID in testfile" << endl; |
| return 1; |
| } |
| |
| // Create a new ZID record for peer ZID "123456789012" |
| ZIDRecord zr3((unsigned char*) "123456789012"); |
| zid->getRecord(&zr3); |
| if (!zr3.isValid()) { |
| cerr << "New ZID record '123456789012' not set to valid" << endl; |
| return 1; |
| } |
| zid->saveRecord(&zr3); |
| |
| // create a second record with peer ZID "210987654321" |
| ZIDRecord zr4((unsigned char*) "210987654321"); |
| zid->getRecord(&zr4); |
| if (!zr4.isValid()) { |
| cerr << "New ZID record '210987654321' not set to valid" << endl; |
| return 1; |
| } |
| zid->saveRecord(&zr4); |
| |
| // now set a first RS1 with default expiration interval, check |
| // if set correctly, valid flag and expiration interval |
| zr3.setNewRs1((unsigned char*) "11122233344455566677788899900012"); |
| if (memcmp(zr3.getRs1(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| cerr << "RS1 was not set (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs1Valid()) { |
| cerr << "RS1 was not set to valid state (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs1NotExpired()) { |
| cerr << "RS1 expired (111...012)" << endl; |
| return 1; |
| } |
| if (zr3.isRs2Valid()) { |
| cerr << "RS2 was set to valid state (111...012)" << endl; |
| return 1; |
| } |
| zid->saveRecord(&zr3); |
| |
| // create a second RS1, RS2 will become the first RS1, check |
| // if set correctly, valid flag and expiration interval for both |
| // RS1 and RS2 |
| zr3.setNewRs1((unsigned char*) "00099988877766655544433322211121"); |
| if (memcmp(zr3.getRs1(), "00099988877766655544433322211121", RS_LENGTH) != 0) { |
| cerr << "RS1 was not set (000...121)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs1Valid()) { |
| cerr << "RS1 was not set to valid state (000...121)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs1NotExpired()) { |
| cerr << "RS1 expired (000...121)" << endl; |
| return 1; |
| } |
| if (memcmp(zr3.getRs2(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| cerr << "RS2 was not set (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs2Valid()) { |
| cerr << "RS2 was not set to valid state (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3.isRs2NotExpired()) { |
| cerr << "RS2 expired (111...012)" << endl; |
| return 1; |
| } |
| zid->saveRecord(&zr3); |
| |
| zid->close(); |
| |
| // Reopen, check if first record is still valid, RSx vaild and |
| // not expired. Then manipulate 2nd record. |
| zid->open("testzid2"); |
| |
| ZIDRecord zr3a((unsigned char*) "123456789012"); |
| zid->getRecord(&zr3a); |
| if (!zr3a.isValid()) { |
| cerr << "Re-read ZID record '123456789012' not set to valid" << endl; |
| return 1; |
| } |
| if (memcmp(zr3a.getRs1(), "00099988877766655544433322211121", RS_LENGTH) != 0) { |
| cerr << "re-read RS1 was not set (000...121)" << endl; |
| return 1; |
| } |
| if (!zr3a.isRs1Valid()) { |
| cerr << "Re-read RS1 was not set to valid state (000...121)" << endl; |
| return 1; |
| } |
| if (!zr3a.isRs1NotExpired()) { |
| cerr << "re-read RS1 expired (000...121)" << endl; |
| return 1; |
| } |
| if (memcmp(zr3a.getRs2(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| cerr << "re-read RS2 was not set (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3a.isRs2Valid()) { |
| cerr << "Re-read RS2 was not set to valid state (111...012)" << endl; |
| return 1; |
| } |
| if (!zr3a.isRs2NotExpired()) { |
| cerr << "Re-read RS2 expired (111...012)" << endl; |
| return 1; |
| } |
| |
| ZIDRecord zr5((unsigned char*) "210987654321"); |
| zid->getRecord(&zr5); |
| |
| |
| // set new RS1 with expire interval of 5 second, then check immediatly |
| zr5.setNewRs1((unsigned char*) "aaa22233344455566677788899900012", 5); |
| if (!zr5.isValid()) { |
| cerr << "Re-read ZID record '210987654321' not set to valid" << endl; |
| return 1; |
| } |
| if (memcmp(zr5.getRs1(), "aaa22233344455566677788899900012", RS_LENGTH) != 0) { |
| cerr << "RS1 (2) was not set (aaa...012)" << endl; |
| return 1; |
| } |
| if (!zr5.isRs1Valid()) { |
| cerr << "RS1 (2) was not set to valid state (aaa...012)" << endl; |
| return 1; |
| } |
| if (!zr5.isRs1NotExpired()) { |
| cerr << "RS1 (2) expired (aaa...012)" << endl; |
| return 1; |
| } |
| |
| // wait for 6 second, now the expire check shall fail |
| sleep(6); |
| if (zr5.isRs1NotExpired()) { |
| cerr << "RS1 (2) is not expired after defined interval (aaa...012)" << endl; |
| return 1; |
| } |
| |
| zr5.setNewRs1((unsigned char*) "bbb99988877766655544433322211121", 256); |
| zid->saveRecord(&zr5); |
| |
| zid->close(); |
| |
| // Test migration |
| zid->open("testzidOld"); |
| zid->close(); |
| |
| } |
| |
| #endif |
| |
| /** EMACS ** |
| * Local variables: |
| * mode: c++ |
| * c-default-style: ellemtel |
| * c-basic-offset: 4 |
| * End: |
| */ |