Need Help with Python/C API
Hi guys,
I Need to know how do i create a dictionary... eg:
n = pali_hash
n={}
n={1:{ } } -> i need to know how to make a key of a dictionary, to a
dictionary using Python/C API's
Pls do help
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why is my hash being weird??
Hi ,
I am using Fedora Core -3 and my Python version is 2.4 .
kernel version - 2.6.9-1.667smp
There is some freakish thing that happens with python hashes when i
run a python script
my python file is basically :
myhash = {}
def summa():
global myhash
myhash[0] = 0
myhash[1] = 1
myhash[2] = 2
myhash[3] = 3
i run a C file :
main(int argc, char **argv)
{
int i = atoi(argv[1]), j;
printf("myhash = {}\n");
printf("def summa():\n");
printf(" global myhash\n");
for (j = 0; j < i; j++)
printf("myhash[%d] = %d\n", j, j);
printf("\nsumma()\n");
}
and the output of this .c file is redirected to a .py file.
I do the following Steps to the .c file to create the .py file
1 cc -o s s.c
2 ./s (input) >>test.py
3 python test.py
When i run python to this .py file , i find that this process eats
lots of virtual memory of my machine. I can give u detailed examples
to what heights can the virtual memory can go , when i do a top ,
with the inputs given to the c file
1. input is 10 VIRT is 119m
2. input is 30 VIRT is 470m
3input is 70 VIRT is 1098m
4input is 100 VIRT is 1598m
where VIRT - virtual memory
m - MB ( Mega Bytes)
these results are very alarming as it means that each
hash[i] requires 1 KB of space approx .
I would like to know why and how to solve this problem ?
I also did try change the above .c file , so that the new .c file
will have multiple functions that divide the load of building the hash
structure. Then again the results are same
Pls do assist me with this problem of mine !!!
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Re: why is my hash being weird??
You are appending to the test file. How many times have
you appended to it? Once? Twice? A dozen times? Just
what is in the file test.py after all this time?
> when input =4
> ./s 4 >test.py
>
>test.py is
> myhash = {}
> def summa():
>global myhash
>myhash[0] = 0
> myhash[1] = 1
>myhash[2] = 2
>myhash[3] = 3
>
>if now input is 100 then test py will be
>
> myhash = {}
> def summa():
>global myhash
>myhash[0] = 0
>myhash[1] = 1
>myhash[2] = 2
>myhash[3] = 3
>...
>...
>...
>...
>myhash[99] = 99
> I append only once , and that too i do this exercise to get a largely big
> hash.
This result came to a bit of a suprise.. when i construct large hashes
.. my system gets stalled
So i was interested how, for this i came up with this exercise .
Anyway thanks
Dennis
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Re: why is my hash being weird??
Surely adopting the above method is much better than what i have approached earlier . The main reason i did adopt this exercise was when i have to marshal a 20 - 40 MB above test.py file to the disk , the simple load of the test.py will sky rocket my virtual memory consumption. I was bit troubled with this bottleneck , so i wanted to do some research before i come to some conclusions . Anyways , i really appreciate ur enthusiasm to helping me come to a conclusion Dennis -- http://mail.python.org/mailman/listinfo/python-list
Segmentation Fault
I would like to ask a question. How do one handle the exception due to Segmentation fault due to Python ? Our bit operations and arithmetic manipulations are written in C and to some of our testcases we experiance Segmentation fault from the python libraries. If i know how to handle the exception for Segmentation fault , it will help me complete the run on any testcase , even if i experiance Seg Fault due to any one or many functions in my testcase. -- http://mail.python.org/mailman/listinfo/python-list
Apache with Python 2.4 Need Help !!!
Hi, I am currently using Fedora Core - 3 with apache 2.0 Web Server and Python 2.4 . I have numerous dependencies when i want to use Python 2.4 version with Apache 2.0 Web Server . I have installed the mod-python module , for apache , which is one of the package i got while installing Fedora Core - 3 . I want to host some information onto another machine , which have a running Apache 2.0 and mod-python installed too , so i would like to know have apache released any version that can be successfully use Python 2.4 ( with mod-python module ) using Fedora Core -3 . I would prefer a stable and successful version , if any , that goes well with Python 2.4 . -- http://mail.python.org/mailman/listinfo/python-list
Need Help
Hi , I need some info about the following snippet . --- protocol = 'NTLMSSP\000'#name type = '\001\000' #type 1 zeros1 = '\000\000' zeros2 = '\000\000\000\000\000\000\000\000\000' zeros3 = '\000\000\000\000\000\000\000\000\000\000\000' smthg1 = '0\000\000\000\000\000\000\000'# something with chr(48) length? smthg2 = '0\000\000\000'# something with chr(48) lenght? msg1 = protocol + type + zeros1 + flags + zeros2 + zeros3 + smthg1 + smthg2 msg1 = base64.encodestring(msg1) msg1 = string.replace(msg1, '\012', '') --- In the above code what does " 000\000\000\000\000\000\000\000\000 " signify ? Which form of representation is this ? This code is from the NTLM APS python code from sourceforge 0.98 version . -- http://mail.python.org/mailman/listinfo/python-list
Need Help
Hi , I am currently working on NTLM (Windows NT Lan Manager) APS (Authentication Proxy Server ) . NTLM is MS own proprietary protocol that will allow successful authentication for only MS browsers . NTLM APS was successfully cracked by Rosmanov and i am working on NTLM APS python package version 0.98 . I am currently on it to port to C language . -- http://mail.python.org/mailman/listinfo/python-list
Need Help
Hi , I am currently working on NTLM (Windows NT Lan Manager) APS (Authentication Proxy Server ) . NTLM is MS own proprietary protocol that will allow successful authentication for only MS browsers . NTLM APS was successfully cracked by Rosmanov and i am working on NTLM APS python package version 0.98 . I am currently on it to port to C language . I have a specific issue on the authentication technique which this APS uses . NTLM APS python package ver 0.98 uses two major types of authentication process 1) DES 2) MD4 . The author has clearly stated that he has adopted both the above python implementations from Python Cryptology Toolkit ( py-crypto) version 2.0.1 . I started to use the DES C implementation of py-crypto so that i can have an equivalent DES python implementation without breaking a sweat . ;-) But both the implementation was totally different . I am getting different hashed outputs . I compared each byte value of password from python DES implementation and C implementation , both were not same . Is anyone out there, can tell me why they are different . Also i found that the key generation is different between them and i suspect because of this the outputs are different ? So can this be that the C implementation of DES in py-crypto had bugs and that it had been corrected by Rozmanov and implemented in python ? Also will there be any difference in implementing DES b/w python and C language ? Thanks, Dennis -- http://mail.python.org/mailman/listinfo/python-list
NTLM APS python version 0.98
Hi , I am working on NTLM (Windows NT Lan Manager )APS (Authentication Proxy Server ) , to port to C language . I am using ethereal to monitor the packets sent between client and server . NTLM is a MS proprietary protocol designed so that will allow authentication only from MS browsers . This proprietary was cracked and code was written in python by Rozmanov . The link to the source pool about NTLM is http://www.innovation.ch/personal/ronald/ntlm.html Have any one worked extensively with NTLM APS python package 0.98 ? NTLM APS have a 6 step process :- (C) - client (S)- server 1: C --> S GET ... 2: C <-- S 401 Unauthorized WWW-Authenticate: NTLM 3: C --> S GET ... Authorization: NTLM 4: C <-- S 401 Unauthorized WWW-Authenticate: NTLM 5: C --> S GET ... Authorization: NTLM 6: C <-- S 200 Ok After step 6 client must connect to server . But when i run NTLM APS and watch the packets sent b/w client and server in ethereal , i see that client does not recieve 200 Ok at Step 6 , but receives 401 Unauthorized . After this i get a dialog box which requests me to enter my user name and password . I enter the credentials and then the server authorizes the client . I am sorry that i cannot give more info on this . I can send the saved page log from ethereal . That will give a very good idea . As per theory , it is only a 6 step process . I am puzzled regarding this . thanks , dennis -- http://mail.python.org/mailman/listinfo/python-list
Python C Embedded ! Attribute Error
Hi ,
I am using the below C code so that i can embed a Python Code and
get input from a python function and use it in C code .
Below is the C Code
#include
int
main(int argc, char *argv[])
{
PyObject *pName, *pModule, *pDict, *pFunc;
PyObject *pArgs, *pValue;
int i;
if (argc < 3) {
fprintf(stderr,"Usage: call pythonfile funcname [args]\n");
return 1;
}
Py_Initialize();
pName = PyString_FromString(argv[1]);
/* Error checking of pName left out */
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('/home/dennis/workplace/
aps098')");
PyRun_SimpleString("sys.path.append('/home/dennis/workplace/aps098/
lib')");
PyRun_SimpleString("import server, logger,config, ntlm_procs,
config_affairs ");
pModule = PyImport_Import(pName);
Py_DECREF(pName);
if (pModule != NULL) {
pFunc = PyObject_GetAttrString(pModule, argv[2]);
/* pFunc is a new reference */
if (pFunc && PyCallable_Check(pFunc)) {
pArgs = PyTuple_New(argc - 3);
for (i = 0; i < argc - 3; ++i) {
pValue = PyInt_FromLong(atoi(argv[i + 3]));
if (!pValue) {
Py_DECREF(pArgs);
Py_DECREF(pModule);
fprintf(stderr, "Cannot convert argument\n");
return 1;
}
/* pValue reference stolen here: */
PyTuple_SetItem(pArgs, i, pValue);
}
pValue = PyObject_CallObject(pFunc, pArgs);
Py_DECREF(pArgs);
if (pValue != NULL) {
printf("Result of call: %ld\n", PyInt_AsLong(pValue));
Py_DECREF(pValue);
}
else {
Py_DECREF(pFunc);
Py_DECREF(pModule);
PyErr_Print();
fprintf(stderr,"Call failed\n");
return 1;
}
}
else {
if (PyErr_Occurred())
PyErr_Print();
fprintf(stderr, "Cannot find function \"%s\"\n", argv[2]);
}
Py_XDECREF(pFunc);
Py_DECREF(pModule);
}
else {
PyErr_Print();
fprintf(stderr, "Failed to load \"%s\"\n", argv[1]);
return 1;
}
Py_Finalize();
return 0;
}
The python code is a simple code
def pr(var):
print var
I am getting error
AttributeError: 'module' object has no attribute 'print'
Cannot find function "print"
I am a newbie to python . I need some to embed python in C . Anyone
Pls help
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Need Help with base64
Hi ,
I am currently trying to implement base64 encoding and decoding
scheme in C . Python has a module , base64 , that will do the
encoding and decoding with ease . I am aware of OpenSSL having support
for base64 encoding and decoding , but i will have to now implement
both in C without using the openssl libraries .
I was able to download a code w.r.t. base 64 encoding and
decoding . I am attaching the code below .
void encodeblock( unsigned char cin[3], unsigned char cout[4], int
nlen )
{
cout[0] = cb64[ cin[0] >> 2 ];
cout[1] = cb64[ ((cin[0] & 0x03) << 4) | ((cin[1] & 0xf0) >> 4) ];
cout[2] = (unsigned char) (nlen > 1 ? cb64[ ((cin[1] & 0x0f) << 2)
| ((cin[2] & 0xc0) >> 6) ] : '=');
cout[3] = (unsigned char) (nlen > 2 ? cb64[ cin[2] & 0x3f ] :
'=');
}
void decodeblock( unsigned char cin[4], unsigned char cout[3] )
{
cout[ 0 ] = (unsigned char ) (cin[0] << 2 | cin[1] >> 4);
cout[ 1 ] = (unsigned char ) (cin[1] << 4 | cin[2] >> 2);
cout[ 2 ] = (unsigned char ) (((cin[2] << 6) & 0xc0) | cin[3]);
}
int base641_decodestring(char* pcstr,int size,char** ppcdest)
{
unsigned char cin[4] = {""};
unsigned char cout[3] = {""};
unsigned char cv = 0;
int ni = 0;
int nlen = 0;
char* cptr = pcstr;
*ppcdest = malloc(sizeof(char)*160);
if (!*ppcdest)
{
return 1;
}
memset(*ppcdest,0,sizeof(char)*160);
char* pcstring = malloc( sizeof(char) * SIZE);
if (!pcstring)
{
aps_log("APS_log.txt","\nbae64.c:base64encode:malloc failed
\n");
return 1;
}
memset(pcstring,'\0',SIZE);
for( nlen = 0, ni = 0; ni < 4; ni++ )
{
cv = 0;
while( cv == 0 )
{
cv = (unsigned char) *cptr;
cv = (unsigned char) ((cv < 43 || cv > 122) ? 0 :
cd64[ cv - 43 ]);
if( cv )
{
cv = (unsigned char) ((cv == '$') ? 0 : cv - 61);
}
}
if( cptr++ )
{
nlen++;
if( cv )
{
cin[ ni ] = (unsigned char) (cv - 1);
}
}
else
{
cin[ni] = 0;
}
}
if( nlen )
{
decodeblock( cin, cout );
}
memcpy(*ppcdest,cout,160);
return 0;
}/*end of base64_decode */
char* base64_encode(char* pcstr)
{
unsigned char cin[3] = {""};
unsigned char cout[4] = {""};
int ni = 0;
int nlen = 0;
int flag = 1;
char* cptr = pcstr;
char* pcstring = malloc( sizeof(char) * SIZE);
if (!pcstring)
{
aps_log("APS_log.txt","\nbae64.c:base64encode:malloc failed
\n");
return (void*)0;
}
memset(pcstring,'\0',SIZE);
while( flag )
{
for( ni = 0; ni < 3; ni++ )
{
cin[ni] = (unsigned char)*cptr;
if( *++cptr != '\0' )
nlen++;
else
{
cin[ni] = 0;
flag = 0;
break;
}
}
encodeblock(cin, cout,nlen);
strcat(pcstring,cout);
}
return pcstring;
}/* end of base64_encode */
But this code gives different hex values as compared to the
python base64.encodestring and base64.decodestring respectively .
I need some help on this matter . I need some pointers on
where is the mistake for the above file .
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