From b80844f51353339cfbb8b35a5585911cdb4301e2 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Tue, 12 Feb 2013 18:47:34 +0000
Subject: moved everything into worker class.

---
(limited to 'src/eyefiworker.cc')

diff --git a/src/eyefiworker.cc b/src/eyefiworker.cc
index 450661a..ac75fc1 100644
--- a/src/eyefiworker.cc
+++ b/src/eyefiworker.cc
@@ -3,10 +3,19 @@
 # include <sys/resource.h>
 #endif
 #include <syslog.h>
+#include <cassert>
+#include <iostream>
+#include <fstream>
 #include <stdexcept>
+#include <iterator>
+#include <algorithm>
+#include <sys/wait.h>
+#include <autosprintf.h>
+#include "eyekinfig.h"
+#include "eyetil.h"
 #include "eyefiworker.h"
 #ifdef HAVE_SQLITE
-# include "sqlite3.h"
+# include "iiidb.h"
 #endif
 
 eyefiworker::eyefiworker()
@@ -52,3 +61,279 @@ int eyefiworker::run(int bindport) {
 	close(socket); socket = SOAP_INVALID_SOCKET;
     }
 }
+
+static binary_t session_nonce;
+#ifdef HAVE_SQLITE
+    static struct {
+	std::string filesignature;
+	long filesize;
+	std::string filename;
+	inline void reset() { filesignature.erase(); filename.erase(); filesize=0; }
+	inline void set(const std::string n,const std::string sig,long siz) {
+	    filename = n; filesignature = sig; filesize = siz;
+	}
+	inline bool is(const std::string n,const std::string sig,long siz) {
+	    return filesize==siz && filename==n && filesignature==sig;
+	}
+    }   already;
+#endif /* HAVE_SQLITE */
+
+static bool detached_child() {
+    pid_t p = fork();
+    if(p<0) {
+	syslog(LOG_ERR,"Failed to fork away for hook execution");
+	_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;
+    }
+    return false;
+}
+
+static int E(eyefiworker* efs,const char *c,const std::exception& e) {
+    efs->keep_alive=0;
+    syslog(LOG_ERR,"error while processing %s: %s",c,e.what());
+    return soap_sender_fault(efs,gnu::autosprintf("error processing %s",c),0);
+}
+
+int eyefiworker::StartSession(
+	std::string macaddress,std::string cnonce,
+	int transfermode,long transfermodetimestamp,
+	struct rns__StartSessionResponse &r ) try {
+    syslog(LOG_INFO,
+	    "StartSession request from %s with cnonce=%s, transfermode=%d, transfermodetimestamp=%ld",
+	    macaddress.c_str(), cnonce.c_str(), transfermode, transfermodetimestamp );
+    eyekinfig_t eyekinfig(macaddress);
+    r.credential = binary_t(macaddress+cnonce+eyekinfig.get_upload_key()).md5().hex();
+
+    r.snonce = session_nonce.make_nonce().hex();
+    r.transfermode=transfermode;
+    r.transfermodetimestamp=transfermodetimestamp;
+    r.upsyncallowed=false;
+
+    std::string cmd = eyekinfig.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;
+}catch(const std::exception& e) { return E(this,"StartSession",e); }
+
+int eyefiworker::GetPhotoStatus(
+	std::string credential, std::string macaddress,
+	std::string filename, long filesize, std::string filesignature,
+	int flags,
+	struct rns__GetPhotoStatusResponse &r ) try {
+    syslog(LOG_INFO,
+	    "GetPhotoStatus request from %s with credential=%s, filename=%s, filesize=%ld, filesignature=%s, flags=%d; session nonce=%s",
+	    macaddress.c_str(), credential.c_str(), filename.c_str(), filesize, filesignature.c_str(), flags,
+	    session_nonce.hex().c_str() );
+
+    eyekinfig_t eyekinfig(macaddress);
+    std::string computed_credential = binary_t(macaddress+eyekinfig.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");
+
+#ifdef HAVE_SQLITE
+    iiidb_t D(eyekinfig);
+    seclude::stmt_t S = D.prepare(
+	    "SELECT fileid FROM photo"
+	    " WHERE mac=:mac AND filename=:filename"
+	    "  AND filesize=:filesize AND filesignature=:filesignature"
+    ).bind(":mac",macaddress)
+     .bind(":filename",filename).bind(":filesize",filesize)
+     .bind(":filesignature",filesignature);
+    if(!S.step()) {
+	r.fileid = 1; r.offset = 0;
+    }else{
+	r.fileid = S.column<long>(0);
+	r.offset = filesize;
+	already.set(filename,filesignature,filesize);
+    }
+#else /* HAVE_SQLITE */
+    r.fileid=1, r.offset=0;
+#endif /* HAVE_SQLITE */
+    return SOAP_OK;
+}catch(const std::exception& e) { return E(this,"GetPhotoStatus",e); }
+
+int eyefiworker::MarkLastPhotoInRoll(
+	std::string macaddress, int mergedelta,
+	struct rns__MarkLastPhotoInRollResponse&/* r */ ) try {
+    syslog(LOG_INFO,
+	    "MarkLastPhotoInRoll request from %s with mergedelta=%d",
+	    macaddress.c_str(), mergedelta );
+    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);
+	}
+    }
+    keep_alive = 0;
+    return SOAP_OK;
+}catch(const std::exception& e) { return E(this,"MarkLastPhotoInRoll",e); }
+
+int eyefiworker::UploadPhoto(
+	int fileid, std::string macaddress,
+	std::string filename, long filesize, std::string filesignature,
+	std::string encryption, int flags,
+	struct rns__UploadPhotoResponse& r ) try {
+    syslog(LOG_INFO,
+	    "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 );
+    std::string::size_type fnl=filename.length();
+    if(fnl<sizeof(".tar") || strncmp(filename.c_str()+fnl-sizeof(".tar")+sizeof(""),".tar",sizeof(".tar")))
+	throw std::runtime_error(gnu::autosprintf("honestly, I expected the tarball coming here, not '%s'",filename.c_str()));
+    std::string the_file(filename,0,fnl-sizeof(".tar")+sizeof(""));
+    std::string the_log = the_file+".log";
+
+    eyekinfig_t eyekinfig(macaddress);
+
+    umask(eyekinfig.get_umask());
+
+    std::string td = eyekinfig.get_targetdir();
+    tmpdir_t indir(td+"/.incoming.XXXXXX");
+
+    std::string tf,lf;
+    binary_t digest, idigest;
+#ifdef HAVE_SQLITE
+    bool beenthere = false;
+#endif
+
+    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(!tf.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
+#ifdef HAVE_SQLITE
+	    if(!(*i).size) {
+		if(!already.is(filename,filesignature,filesize))
+		    throw std::runtime_error("got zero-length upload for unknown file");
+		beenthere = true; continue;
+	    }
+#endif
+
+	    tarchive_t a((*i).ptr,(*i).size);
+	    while(a.read_next_header()) {
+		std::string ep = a.entry_pathname(), f = indir.get_file(ep);
+		if(ep==the_file) tf = f;
+		else if(ep==the_log) lf = f;
+		else continue;
+		int fd=open(f.c_str(),O_CREAT|O_WRONLY,0666);
+		if(fd<0)
+		    throw std::runtime_error(gnu::autosprintf("failed to create output file '%s'",f.c_str()));
+		if(!a.read_data_into_fd(fd))
+		    throw std::runtime_error(gnu::autosprintf("failed to untar file into '%s'",f.c_str()));
+		close(fd);
+	    }
+	}
+    }
+
+#ifdef HAVE_SQLITE
+    if(beenthere) {
+	r.success=true;
+	return SOAP_OK;
+    }
+#endif
+
+    if(tf.empty()) throw std::runtime_error("haven't seen THE file");
+    if(digest!=idigest) throw std::runtime_error("integrity digest verification failed");
+
+    std::string::size_type ls = tf.rfind('/');
+    // XXX: actually, lack of '/' signifies error here
+    std::string tbn = (ls==std::string::npos)?tf:tf.substr(ls+1);
+    ls = lf.rfind('/');
+    std::string lbn = (ls==std::string::npos)?lf:lf.substr(ls+1);
+    std::string ttf,tlf;
+    bool success = false;
+    for(int i=0;i<32767;++i) {
+	const char *fmt = i ? "%1$s/(%3$05d)%2$s" : "%1$s/%2$s";
+	ttf = (const char*)gnu::autosprintf(fmt,td.c_str(),tbn.c_str(),i);
+	if(!lf.empty()) tlf = (const char*)gnu::autosprintf(fmt,td.c_str(),lbn.c_str(),i);
+	if( (!link(tf.c_str(),ttf.c_str())) && (lf.empty() || !link(lf.c_str(),tlf.c_str())) ) {
+	    unlink(tf.c_str());
+	    if(!lf.empty()) unlink(lf.c_str());
+	    success=true;
+	    break;
+	}
+    }
+    std::string cmd = eyekinfig.get_on_upload_photo();
+    if(success) {
+#ifdef HAVE_SQLITE
+	{
+	    iiidb_t D(eyekinfig);
+	    D.prepare(
+		    "INSERT INTO photo"
+		    " (ctime,mac,fileid,filename,filesize,filesignature,encryption,flags)"
+		    " VALUES"
+		    " (:ctime,:mac,:fileid,:filename,:filesize,:filesignature,:encryption,:flags)"
+	    ).bind(":ctime",time(0))
+	     .bind(":mac",macaddress)
+	     .bind(":fileid",fileid).bind(":filename",filename)
+	     .bind(":filesize",filesize).bind(":filesignature",filesignature)
+	     .bind(":encryption",encryption).bind(":flags",flags)
+	     .step();
+	}
+#endif /* HAVE_SQLITE */
+	if((!cmd.empty()) && detached_child()) {
+	    putenv( gnu::autosprintf("EYEFI_UPLOADED_ORIG=%s",tbn.c_str()) );
+	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
+	    putenv( gnu::autosprintf("EYEFI_UPLOADED=%s",ttf.c_str()) );
+	    if(!lf.empty()) putenv( gnu::autosprintf("EYEFI_LOG=%s",tlf.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;
+}catch(const std::exception& e) { return E(this,"UploadPhoto",e); }
+
--
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