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My knownhost work as of right now. It works at least partly. More tests and

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tweaks will come.
This commit is contained in:
Daniel Stenberg
2009-05-07 13:09:48 +00:00
parent 4bc1b8a1d7
commit 4b991b232d
11 changed files with 994 additions and 35 deletions
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47
example/simple/ssh2_exec.c
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@ -1,5 +1,5 @@
/*
* $Id: ssh2_exec.c,v 1.2 2009/05/05 12:30:19 bagder Exp $
* $Id: ssh2_exec.c,v 1.3 2009/05/07 13:09:49 bagder Exp $
*
* Sample showing how to use libssh2 to execute a command remotely.
*
@ -26,7 +26,6 @@
#include <libssh2.h>
static int waitsocket(int socket_fd, LIBSSH2_SESSION *session)
{
struct timeval timeout;
@ -59,11 +58,12 @@ static int waitsocket(int socket_fd, LIBSSH2_SESSION *session)
int main(int argc, char *argv[])
{
const char *hostname = "127.0.0.1";
const char *commandline = "uptime";
const char *username = "user";
const char *password = "password";
unsigned long hostaddr;
int sock, i;
int sock;
struct sockaddr_in sin;
const char *fingerprint;
LIBSSH2_SESSION *session;
@ -71,16 +71,17 @@ int main(int argc, char *argv[])
int rc;
int exitcode;
int bytecount = 0;
size_t len;
LIBSSH2_KNOWNHOSTS *nh;
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(2,0), &wsadata);
#endif
if (argc > 1) {
hostaddr = inet_addr(argv[1]);
} else {
hostaddr = htonl(0x7F000001);
}
if (argc > 1)
/* must be ip address only */
hostname = argv[1];
if (argc > 2) {
username = argv[2];
}
@ -91,6 +92,8 @@ int main(int argc, char *argv[])
commandline = argv[4];
}
hostaddr = inet_addr(hostname);
/* Ultra basic "connect to port 22 on localhost"
* Your code is responsible for creating the socket establishing the
* connection
@ -141,17 +144,25 @@ int main(int argc, char *argv[])
return -1;
}
/* At this point we havn't yet authenticated. The first thing to do
* is check the hostkey's fingerprint against our known hosts Your app
* may have it hard coded, may go to a file, may present it to the
* user, that's your call
*/
fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_MD5);
fprintf(stderr, "Fingerprint: ");
for(i = 0; i < 16; i++) {
fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]);
nh = libssh2_knownhost_init(session);
libssh2_knownhost_parsefile(nh, "/home/daniel/.ssh/known_hosts",
LIBSSH2_KNOWNHOST_FILE_OPENSSH);
fingerprint = libssh2_session_hostkey(session, &len);
if(fingerprint) {
struct libssh2_knownhost host;
int check;
check = libssh2_knownhost_check(nh, (char *)hostname,
(char *)fingerprint, len,
LIBSSH2_KNOWNHOST_TYPE_DEFAULT, &host);
fprintf(stderr, "Host check: %d, key: %s\n", check,
(check <= LIBSSH2_KNOWNHOST_CHECK_MISMATCH)?
host.key:"<none>");
}
fprintf(stderr, "\n");
libssh2_knownhost_free(nh);
if ( strlen(password) != 0 ) {
/* We could authenticate via password */