12-04-2006
10 More Discussions You Might Find Interesting
1. Programming
Hi Folks
I am not a c programmer .But i need help in writing a program which can do this any ideas on how to go about it .
i start a server on the target server where files need to be copied
start-server -port 5006 & ---start the server and listen it on a partcular port
on the source... (2 Replies)
Discussion started by: linuxdba
2 Replies
2. Shell Programming and Scripting
Is there a way how to react on the message a client sent to the server?
I would like as the client sent message to server: "get information such and such" and server would answer.
Thank you for reply! (6 Replies)
Discussion started by: MartyIX
6 Replies
3. Solaris
hello guys, i want to install netcat on my solaris. after i tar and gunzip netcat i'm confuse what do i must to do ? please help me to install netcat on my solaris. I'm beginner :( (2 Replies)
Discussion started by: praset
2 Replies
4. Linux
Hello,
Thank you very much for the line nc -lp <port> . I tried to run simple chat session with nc as it's shown in catonmatDOTorg but failed miserably with that syntax inspite of opening port 7777 by iptables . But your command example is working nicely.
So a bagful of thanks :))
Only one... (0 Replies)
Discussion started by: vectrum
0 Replies
5. Shell Programming and Scripting
Hi;
I have a url like
http://localhost:8080/examples/jsp/dates/nextPageToPost.jsp?name=ajay&password=pas&sex=Male&check=on&nationality=USA&description=aa&submit=submit
in which i want to use nc for http post for parameters like "name","password"....etc
can neone please help me how to do that... (3 Replies)
Discussion started by: ajaypadvi
3 Replies
6. IP Networking
From my machine (ubuntu), I can do
$ nc somemachine 80
But, when I want to connect to other machine that runs nc on different ports, it throws "Connection refused" error.
The same error occurs on my local machine. For example,
nc -l 5555
nc x.x.x.x 5555 --> this throws "Connection... (2 Replies)
Discussion started by: dinga
2 Replies
7. IP Networking
Hi all,
I know my question is regarding Windows and not Linux, but I simply need people who know Netcat pretty well and I'm guessing here is a good place for that. So on with my question.
I'm doing some research, and I was playing around with netcat on a WinXP VM but I can't seem to get... (0 Replies)
Discussion started by: MrCrumbs
0 Replies
8. Shell Programming and Scripting
Hi
Need help to connect from Ubuntu to Windows using NetCat nc
I can not get my script to send new-line
Her is what I have tried(sleep 2 ; echo user ; sleep 1; echo pass; sleep 2; echo netstat) | nc -t 10.10.10.34 23
gives this outputÿý%ÿûÿûÿý'ÿýÿýÿûWelcome to Microsoft Telnet Service
... (1 Reply)
Discussion started by: Jotne
1 Replies
9. UNIX for Advanced & Expert Users
Currently I run a number of network tests using netcat that checks for an open port on a remote IP-address, using this syntax:
netcat -v -w 5 -z 107.249.95.5 4488
For some reason, the netcat command above is hanging (although others work fine), but a telnet is showing a valid connection like... (4 Replies)
Discussion started by: ckmehta
4 Replies
10. Emergency UNIX and Linux Support
Dear Linux guru's
I am trying to create a webserver using nc (netcat only) on RHEL 7.2 running on bash shell.
now the easy thing is to get nc listing to a port and respond back
$ while true; do { echo -e 'HTTP/1.0 200 OK\r\n'; set; } | nc -l 7877; done
This when called from a... (3 Replies)
Discussion started by: chakrapani
3 Replies
LEARN ABOUT OSX
evp_sealupdate
EVP_SealInit(3) OpenSSL EVP_SealInit(3)
NAME
EVP_SealInit, EVP_SealUpdate, EVP_SealFinal - EVP envelope encryption
SYNOPSIS
#include <openssl/evp.h>
int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
unsigned char **ek, int *ekl, unsigned char *iv,
EVP_PKEY **pubk, int npubk);
int EVP_SealUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
int *outl, unsigned char *in, int inl);
int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out,
int *outl);
DESCRIPTION
The EVP envelope routines are a high level interface to envelope encryption. They generate a random key and IV (if required) then
"envelope" it by using public key encryption. Data can then be encrypted using this key.
EVP_SealInit() initializes a cipher context ctx for encryption with cipher type using a random secret key and IV. type is normally supplied
by a function such as EVP_des_cbc(). The secret key is encrypted using one or more public keys, this allows the same encrypted data to be
decrypted using any of the corresponding private keys. ek is an array of buffers where the public key encrypted secret key will be written,
each buffer must contain enough room for the corresponding encrypted key: that is ek[i] must have room for EVP_PKEY_size(pubk[i]) bytes.
The actual size of each encrypted secret key is written to the array ekl. pubk is an array of npubk public keys.
The iv parameter is a buffer where the generated IV is written to. It must contain enough room for the corresponding cipher's IV, as
determined by (for example) EVP_CIPHER_iv_length(type).
If the cipher does not require an IV then the iv parameter is ignored and can be NULL.
EVP_SealUpdate() and EVP_SealFinal() have exactly the same properties as the EVP_EncryptUpdate() and EVP_EncryptFinal() routines, as
documented on the EVP_EncryptInit(3) manual page.
RETURN VALUES
EVP_SealInit() returns 0 on error or npubk if successful.
EVP_SealUpdate() and EVP_SealFinal() return 1 for success and 0 for failure.
NOTES
Because a random secret key is generated the random number generator must be seeded before calling EVP_SealInit().
The public key must be RSA because it is the only OpenSSL public key algorithm that supports key transport.
Envelope encryption is the usual method of using public key encryption on large amounts of data, this is because public key encryption is
slow but symmetric encryption is fast. So symmetric encryption is used for bulk encryption and the small random symmetric key used is
transferred using public key encryption.
It is possible to call EVP_SealInit() twice in the same way as EVP_EncryptInit(). The first call should have npubk set to 0 and (after
setting any cipher parameters) it should be called again with type set to NULL.
SEE ALSO
evp(3), rand(3), EVP_EncryptInit(3), EVP_OpenInit(3)
HISTORY
EVP_SealFinal() did not return a value before OpenSSL 0.9.7.
0.9.8 2009-04-03 EVP_SealInit(3)