diff options
Diffstat (limited to 'libssh/dh.c')
| -rw-r--r-- | libssh/dh.c | 76 |
1 files changed, 41 insertions, 35 deletions
diff --git a/libssh/dh.c b/libssh/dh.c index bfcce1a3..924c5755 100644 --- a/libssh/dh.c +++ b/libssh/dh.c @@ -1,39 +1,45 @@ -/* dh.c */ -/* this file contains usefull stuff for Diffie helman algorithm against SSH 2 */ /* -Copyright 2003-2008 Aris Adamantiadis - -This file is part of the SSH Library - -The SSH Library is free software; you can redistribute it and/or modify -it under the terms of the GNU Lesser General Public License as published by -the Free Software Foundation; either version 2.1 of the License, or (at your -option) any later version. - -The SSH Library is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public -License for more details. - -You should have received a copy of the GNU Lesser General Public License -along with the SSH Library; see the file COPYING. If not, write to -the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, -MA 02111-1307, USA. */ - -/* Let us resume the dh protocol. */ -/* Each side computes a private prime number, x at client side, y at server side. */ -/* g and n are two numbers common to every ssh software. */ -/* client's public key (e) is calculated by doing */ -/* e = g^x mod p */ -/* client sents e to the server . */ -/* the server computes his own public key, f */ -/* f = g^y mod p */ -/* it sents it to the client */ -/* the common key K is calculated by the client by doing */ -/* k = f^x mod p */ -/* the server does the same with the client public key e */ -/* k' = e^y mod p */ -/* if everything went correctly, k and k' are equal */ + * dh.c - Diffie-Helman algorithm code against SSH 2 + * + * This file is part of the SSH Library + * + * Copyright (c) 2003-2008 by Aris Adamantiadis + * + * The SSH Library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at your + * option) any later version. + * + * The SSH Library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with the SSH Library; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + * MA 02111-1307, USA. + * + * vim: ts=2 sw=2 et cindent + */ + +/* + * Let us resume the dh protocol. + * Each side computes a private prime number, x at client side, y at server + * side. + * g and n are two numbers common to every ssh software. + * client's public key (e) is calculated by doing: + * e = g^x mod p + * client sents e to the server. + * the server computes his own public key, f + * f = g^y mod p + * it sents it to the client + * the common key K is calculated by the client by doing + * k = f^x mod p + * the server does the same with the client public key e + * k' = e^y mod p + * if everything went correctly, k and k' are equal + */ #include <stdio.h> #include <stdlib.h> |