| -rw-r--r-- | src/eyefiservice.cc | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/src/eyefiservice.cc b/src/eyefiservice.cc index d233a07..1a21c02 100644 --- a/src/eyefiservice.cc +++ b/src/eyefiservice.cc @@ -1,202 +1,213 @@ #include <cassert> #include <iostream> #include <fstream> #include <stdexcept> #include <iterator> #include <syslog.h> #include <sys/wait.h> #include <autosprintf.h> +#include <openssl/rand.h> #include "eyekinfig.h" #include "eyetil.h" #include "soapeyefiService.h" +static binary_t session_nonce; + static bool detached_child() { pid_t p = fork(); if(p<0) throw std::runtime_error("failed to fork()"); if(!p) { p = fork(); if(p<0) { syslog(LOG_ERR,"Failed to re-fork child process"); _exit(-1); } if(!p) { setsid(); for(int i=getdtablesize();i>=0;--i) close(i); int i=open("/dev/null",O_RDWR); assert(i==0); i = dup(i); assert(i==1); i = dup(i); assert(i==2); return true; } _exit(0); } int rc; if(waitpid(p,&rc,0)<0) throw std::runtime_error("failed to waitpid()"); if(!WIFEXITED(rc)) throw std::runtime_error("error in forked process"); if(WEXITSTATUS(rc)) throw std::runtime_error("forked process signalled error"); return false; } int eyefiService::StartSession( std::string macaddress,std::string cnonce, int transfermode,long transfermodetimestamp, struct rns__StartSessionResponse &r ) { #ifndef NDEBUG syslog(LOG_DEBUG, "StartSession request from %s with cnonce=%s, transfermode=%d, transfermodetimestamp=%ld", macaddress.c_str(), cnonce.c_str(), transfermode, transfermodetimestamp ); #endif r.credential = binary_t(macaddress+cnonce+eyekinfig_t(macaddress).get_upload_key()).md5().hex(); - /* TODO: better nonce generator */ - time_t t = time(0); - r.snonce = binary_t(&t,sizeof(t)).md5().hex(); + + r.snonce = session_nonce.make_nonce().hex(); r.transfermode=transfermode; r.transfermodetimestamp=transfermodetimestamp; r.upsyncallowed=false; std::string cmd = eyekinfig_t(macaddress).get_on_start_session(); if(!cmd.empty()) { if(detached_child()) { putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) ); putenv( gnu::autosprintf("EYEFI_TRANSFERMODE=%d",transfermode) ); putenv( gnu::autosprintf("EYEFI_TRANSFERMODETIMESTAMP=%ld",transfermodetimestamp) ); char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 }; execv("/bin/sh",argv); syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str()); _exit(-1); } } return SOAP_OK; } int eyefiService::GetPhotoStatus( std::string credential, std::string macaddress, std::string filename, long filesize, std::string filesignature, struct rns__GetPhotoStatusResponse &r ) { #ifndef NDEBUG syslog(LOG_DEBUG, - "GetPhotoStatus request from %s with credential=%s, filename=%s, filesize=%ld, filesignature=%s", - macaddress.c_str(), credential.c_str(), filename.c_str(), filesize, filesignature.c_str() ); + "GetPhotoStatus request from %s with credential=%s, filename=%s, filesize=%ld, filesignature=%s; session nonce=%s", + macaddress.c_str(), credential.c_str(), filename.c_str(), filesize, filesignature.c_str(), session_nonce.hex().c_str() ); +#endif + + std::string computed_credential = binary_t(macaddress+eyekinfig_t(macaddress).get_upload_key()+session_nonce.hex()).md5().hex(); + +#ifndef NDEBUG + syslog(LOG_DEBUG, " computed credential=%s", computed_credential.c_str()); #endif + + if (credential != computed_credential) throw std::runtime_error("card authentication failed"); + r.fileid = 1; r.offset = 0; return SOAP_OK; } int eyefiService::MarkLastPhotoInRoll( std::string macaddress, int mergedelta, struct rns__MarkLastPhotoInRollResponse &r ) { #ifndef NDEBUG syslog(LOG_DEBUG, "MarkLastPhotoInRoll request from %s with mergedelta=%d", macaddress.c_str(), mergedelta ); #endif std::string cmd = eyekinfig_t(macaddress).get_on_mark_last_photo_in_roll(); if(!cmd.empty()) { if(detached_child()) { putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) ); putenv( gnu::autosprintf("EYEFI_MERGEDELTA=%d",mergedelta) ); char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 }; execv("/bin/sh",argv); syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str()); _exit(-1); } } return SOAP_OK; } int eyefiService::UploadPhoto( int fileid, std::string macaddress, std::string filename, long filesize, std::string filesignature, std::string encryption, int flags, struct rns__UploadPhotoResponse& r ) { #ifndef NDEBUG syslog(LOG_DEBUG, "UploadPhoto request from %s with fileid=%d, filename=%s, filesize=%ld," " filesignature=%s, encryption=%s, flags=%04X", macaddress.c_str(), fileid, filename.c_str(), filesize, filesignature.c_str(), encryption.c_str(), flags ); #endif eyekinfig_t eyekinfig(macaddress); umask(eyekinfig.get_umask()); std::string td = eyekinfig.get_targetdir(); tmpdir_t indir(td+"/.incoming.XXXXXX"); std::string jf; binary_t digest, idigest; for(soap_multipart::iterator i=mime.begin(),ie=mime.end();i!=ie;++i) { #ifndef NDEBUG syslog(LOG_DEBUG, " MIME attachment with id=%s, type=%s, size=%ld", (*i).id, (*i).type, (long)(*i).size ); #endif if((*i).id && !strcmp((*i).id,"INTEGRITYDIGEST")) { std::string idigestr((*i).ptr,(*i).size); #ifndef NDEBUG syslog(LOG_DEBUG, " INTEGRITYDIGEST=%s", idigestr.c_str()); #endif idigest.from_hex(idigestr); } if( (*i).id && !strcmp((*i).id,"FILENAME") ) { assert( (*i).type && !strcmp((*i).type,"application/x-tar") ); #ifdef III_SAVE_TARS std::string tarfile = indir.get_file(filename); { std::ofstream(tarfile.c_str(),std::ios::out|std::ios::binary).write((*i).ptr,(*i).size); } #endif if(!jf.empty()) throw std::runtime_error("already seen tarball"); if(!digest.empty()) throw std::runtime_error("already have integrity digest"); digest = integrity_digest((*i).ptr,(*i).size,eyekinfig.get_upload_key()); #ifndef NDEBUG syslog(LOG_DEBUG," computed integrity digest=%s", digest.hex().c_str()); #endif tarchive_t a((*i).ptr,(*i).size); if(!a.read_next_header()) throw std::runtime_error("failed to tarchive_t::read_next_header())"); jf = indir.get_file(a.entry_pathname()); int fd=open(jf.c_str(),O_CREAT|O_WRONLY,0666); assert(fd>0); a.read_data_into_fd(fd); close(fd); } } if(jf.empty()) throw std::runtime_error("haven't seen jpeg file"); if(digest!=idigest) throw std::runtime_error("integrity digest verification failed"); std::string::size_type ls = jf.rfind('/'); std::string jbn = (ls==std::string::npos)?jf:jf.substr(ls+1); std::string tf = td+'/'+jbn; bool success = false; if(!link(jf.c_str(), tf.c_str())) { unlink(jf.c_str()); success = true; }else{ for(int i=1;i<32767;++i) { tf = (const char*)gnu::autosprintf( "%s/(%05d)%s", td.c_str(), i, jbn.c_str() ); if(!link(jf.c_str(), tf.c_str())) { unlink(jf.c_str()); success = true; break; } } } std::string cmd = eyekinfig.get_on_upload_photo(); if(success && !cmd.empty()) { if(detached_child()) { putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) ); putenv( gnu::autosprintf("EYEFI_UPLOADED=%s",tf.c_str()) ); char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 }; execv("/bin/sh",argv); syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str()); _exit(-1); } } r.success = true; return SOAP_OK; } |