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#include <lib/network/http_file.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string>
#include <shadow.h>
#include <pwd.h>
DEFINE_REF(eHTTPFile);
eHTTPFile::eHTTPFile(eHTTPConnection *c, int _fd, int method, const char *mime): eHTTPDataSource(c), method(method)
{
fd=_fd;
if (method == methodGET)
{
c->local_header["Content-Type"]=std::string(mime);
size=lseek(fd, 0, SEEK_END);
char asize[10];
snprintf(asize, 10, "%d", size);
lseek(fd, 0, SEEK_SET);
c->local_header["Content-Length"]=std::string(asize);
}
connection->code_descr="OK";
connection->code=200;
}
int eHTTPFile::doWrite(int bytes)
{
if (method == methodGET)
{
char buff[bytes];
if (!size)
return -1;
int len=bytes;
if (len>size)
len=size;
len=read(fd, buff, len);
if (len<=0)
return -1;
size-=connection->writeBlock(buff, len);
if (!size)
return -1;
else
return 1;
} else
return -1;
}
void eHTTPFile::haveData(void *data, int len)
{
if (method != methodPUT)
return;
::write(fd, data, len);
}
eHTTPFile::~eHTTPFile()
{
close(fd);
}
eHTTPFilePathResolver::eHTTPFilePathResolver()
{
}
static char _base64[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
static int unbase64(std::string &dst, const std::string string)
{
dst="";
char c[4];
int pos=0;
unsigned int i=0;
while (1)
{
if (i == string.size())
break;
char *ch=strchr(_base64, string[i++]);
if (!ch)
{
i++;
continue;
}
c[pos++]=ch-_base64;
if (pos == 4)
{
char d[3];
d[0]=c[0]<<2;
d[0]|=c[1]>>4;
d[1]=c[1]<<4;
d[1]|=c[2]>>2;
d[2]=c[2]<<6;
d[2]|=c[3];
dst+=d[0];
if (c[2] != 64)
dst+=d[1];
if (c[3] != 64)
dst+=d[2];
pos=0;
}
}
return pos;
}
int CheckUnixPassword(const char *user, const char *pass)
{
passwd *pwd=getpwnam(user);
if (!pwd)
return -1;
char *cpwd=pwd->pw_passwd;
if (pwd && (!strcmp(pwd->pw_passwd, "x")))
{
spwd *sp=getspnam(user);
if (!sp) // no shadow password defined.
return -1;
cpwd=sp->sp_pwdp;
}
if (!cpwd)
return -1;
if ((*cpwd=='!')||(*cpwd=='*')) // disabled user
return -2;
char *cres=crypt(pass, cpwd);
return !!strcmp(cres, cpwd);
}
static int checkAuth(const std::string cauth)
{
std::string auth;
if (cauth.substr(0, 6) != "Basic ")
return -1;
if (unbase64(auth, cauth.substr(6)))
return -1;
std::string username=auth.substr(0, auth.find(":"));
std::string password=auth.substr(auth.find(":")+1);
if (CheckUnixPassword(username.c_str(), password.c_str()))
return -1;
return 0;
}
DEFINE_REF(eHTTPFilePathResolver);
RESULT eHTTPFilePathResolver::getDataSource(eHTTPDataSourcePtr &ptr, std::string request, std::string path, eHTTPConnection *conn)
{
int method;
eDebug("request = %s, path = %s", request.c_str(), path.c_str());
if (request == "GET")
method=eHTTPFile::methodGET;
else if (request == "PUT")
method=eHTTPFile::methodPUT;
else
{
ptr = new eHTTPError(conn, 405); // method not allowed
return 0;
}
if (path.find("../")!=std::string::npos) // evil hax0r
{
ptr = new eHTTPError(conn, 403);
return 0;
}
if (path[0] != '/') // prepend '/'
path.insert(0,"/");
if (path[path.length()-1]=='/')
path+="index.html";
eHTTPDataSource *data=0;
for (ePtrList<eHTTPFilePath>::iterator i(translate); i != translate.end(); ++i)
{
if (i->root==path.substr(0, i->root.length()))
{
std::string newpath=i->path+path.substr(i->root.length());
if (newpath.find('?'))
newpath=newpath.substr(0, newpath.find('?'));
eDebug("translated %s to %s", path.c_str(), newpath.c_str());
if (i->authorized & ((method==eHTTPFile::methodGET)?1:2))
{
std::map<std::string, std::string>::iterator i=conn->remote_header.find("Authorization");
if ((i == conn->remote_header.end()) || checkAuth(i->second))
{
conn->local_header["WWW-Authenticate"]="Basic realm=\"dreambox\"";
ptr = new eHTTPError(conn, 401); // auth req'ed
return 0;
}
}
int fd=open(newpath.c_str(), (method==eHTTPFile::methodGET)?O_RDONLY:(O_WRONLY|O_CREAT|O_TRUNC), 0644);
if (fd==-1)
{
switch (errno)
{
case ENOENT:
data=new eHTTPError(conn, 404);
break;
case EACCES:
data=new eHTTPError(conn, 403);
break;
default:
data=new eHTTPError(conn, 403); // k.a.
break;
}
break;
}
std::string ext=path.substr(path.rfind('.'));
const char *mime="text/unknown";
if ((ext==".html") || (ext==".htm"))
mime="text/html";
else if ((ext==".jpeg") || (ext==".jpg"))
mime="image/jpeg";
else if (ext==".gif")
mime="image/gif";
else if (ext==".css")
mime="text/css";
else if (ext==".png")
mime="image/png";
else if (ext==".xml")
mime="text/xml";
else if (ext==".xsl")
mime="text/xsl";
data=new eHTTPFile(conn, fd, method, mime);
break;
}
}
if (!data)
return -1;
ptr = data;
return 0;
}
void eHTTPFilePathResolver::addTranslation(std::string path, std::string root, int authorized)
{
if (path[path.length()-1]!='/')
path+='/';
if (root[root.length()-1]!='/')
root+='/';
translate.push_back(new eHTTPFilePath(path, root, authorized));
}
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