зеркало из https://github.com/github/putty.git
Joris van Rantwijk's unified SSH code suitable for PuTTY and PSCP
[originally from svn r504] [this commit reordered to come after creation of 0.49 tag]
This commit is contained in:
Simon Tatham
Родитель
c9e236eb39
Коммит
2832ef1e75
3
Makefile
3
Makefile
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@ -52,7 +52,7 @@ POBJS = ssh.$(OBJ) be_all.$(OBJ)
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##-- objects puttytel
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TOBJS = be_nossh.$(OBJ)
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##-- objects pscp
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SOBJS = scp.$(OBJ) windlg.$(OBJ) scpssh.$(OBJ) be_none.$(OBJ)
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SOBJS = scp.$(OBJ) windlg.$(OBJ) ssh.$(OBJ) be_none.$(OBJ)
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##-- objects putty puttytel pscp
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MOBJS = misc.$(OBJ) version.$(OBJ)
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##-- objects putty pscp
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@ -139,7 +139,6 @@ sshsha.$(OBJ): sshsha.c ssh.h
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sshrand.$(OBJ): sshrand.c ssh.h
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sshblowf.$(OBJ): sshblowf.c ssh.h
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scp.$(OBJ): scp.c putty.h scp.h
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scpssh.$(OBJ): scpssh.c putty.h ssh.h scp.h
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version.$(OBJ): version.c
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be_all.$(OBJ): be_all.c
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be_nossh.$(OBJ): be_nossh.c
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67
scp.c
67
scp.c
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@ -1,6 +1,6 @@
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/*
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* scp.c - Scp (Secure Copy) client for PuTTY.
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* Joris van Rantwijk, Aug 1999, Nov 1999.
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* Joris van Rantwijk, Simon Tatham
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*
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* This is mainly based on ssh-1.2.26/scp.c by Timo Rinne & Tatu Ylonen.
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* They, in turn, used stuff from BSD rcp.
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@ -22,7 +22,7 @@
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#define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \
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((*(LONGLONG*)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600))
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int verbose = 0;
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static int verbose = 0;
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static int recursive = 0;
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static int preserve = 0;
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static int targetshouldbedirectory = 0;
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@ -36,6 +36,14 @@ static void source(char *src);
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static void rsource(char *src);
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static void sink(char *targ);
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/*
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* This function is needed to link with ssh.c, but it never gets called.
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*/
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void term_out(void)
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{
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abort();
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}
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/*
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* Print an error message and perform a fatal exit.
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*/
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@ -63,13 +71,13 @@ static void bump(char *fmt, ...)
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va_end(ap);
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if (connection_open) {
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char ch;
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ssh_send_eof();
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ssh_recv(&ch, 1);
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ssh_scp_send_eof();
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ssh_scp_recv(&ch, 1);
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}
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exit(1);
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}
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void ssh_get_password(char *prompt, char *str, int maxlen)
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static void get_password(const char *prompt, char *str, int maxlen)
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{
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HANDLE hin, hout;
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DWORD savemode, i;
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@ -134,7 +142,7 @@ static void do_cmd(char *host, char *user, char *cmd)
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if (portnumber)
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cfg.port = portnumber;
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err = ssh_init(cfg.host, cfg.port, cmd, &realhost);
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err = ssh_scp_init(cfg.host, cfg.port, cmd, &realhost);
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if (err != NULL)
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bump("ssh_init: %s", err);
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if (verbose && realhost != NULL)
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@ -209,7 +217,7 @@ static int response(void)
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char ch, resp, rbuf[2048];
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int p;
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if (ssh_recv(&resp, 1) <= 0)
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if (ssh_scp_recv(&resp, 1) <= 0)
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bump("Lost connection");
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p = 0;
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@ -222,7 +230,7 @@ static int response(void)
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case 1: /* error */
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case 2: /* fatal error */
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do {
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if (ssh_recv(&ch, 1) <= 0)
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if (ssh_scp_recv(&ch, 1) <= 0)
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bump("Protocol error: Lost connection");
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rbuf[p++] = ch;
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} while (p < sizeof(rbuf) && ch != '\n');
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@ -249,7 +257,7 @@ static void run_err(const char *fmt, ...)
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strcpy(str, "\01scp: ");
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vsprintf(str+strlen(str), fmt, ap);
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strcat(str, "\n");
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ssh_send(str, strlen(str));
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ssh_scp_send(str, strlen(str));
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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@ -321,7 +329,7 @@ static void source(char *src)
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TIME_WIN_TO_POSIX(actime, atime);
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TIME_WIN_TO_POSIX(wrtime, mtime);
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sprintf(buf, "T%lu 0 %lu 0\n", mtime, atime);
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ssh_send(buf, strlen(buf));
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ssh_scp_send(buf, strlen(buf));
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if (response())
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return;
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}
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@ -330,7 +338,7 @@ static void source(char *src)
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sprintf(buf, "C0644 %lu %s\n", size, last);
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if (verbose)
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fprintf(stderr, "Sending file modes: %s", buf);
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ssh_send(buf, strlen(buf));
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ssh_scp_send(buf, strlen(buf));
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if (response())
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return;
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@ -348,7 +356,7 @@ static void source(char *src)
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if (statistics) printf("\n");
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bump("%s: Read error", src);
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}
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ssh_send(transbuf, k);
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ssh_scp_send(transbuf, k);
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if (statistics) {
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stat_bytes += k;
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if (time(NULL) != stat_lasttime ||
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@ -361,7 +369,7 @@ static void source(char *src)
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}
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CloseHandle(f);
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ssh_send("", 1);
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ssh_scp_send("", 1);
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(void) response();
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}
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@ -390,7 +398,7 @@ static void rsource(char *src)
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sprintf(buf, "D0755 0 %s\n", last);
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if (verbose)
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fprintf(stderr, "Entering directory: %s", buf);
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ssh_send(buf, strlen(buf));
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ssh_scp_send(buf, strlen(buf));
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if (response())
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return;
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@ -412,7 +420,7 @@ static void rsource(char *src)
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FindClose(dir);
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sprintf(buf, "E\n");
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ssh_send(buf, strlen(buf));
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ssh_scp_send(buf, strlen(buf));
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(void) response();
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}
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@ -444,18 +452,18 @@ static void sink(char *targ)
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if (targetshouldbedirectory && !targisdir)
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bump("%s: Not a directory", targ);
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ssh_send("", 1);
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ssh_scp_send("", 1);
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while (1) {
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settime = 0;
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gottime:
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if (ssh_recv(&ch, 1) <= 0)
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if (ssh_scp_recv(&ch, 1) <= 0)
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return;
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if (ch == '\n')
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bump("Protocol error: Unexpected newline");
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i = 0;
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buf[i++] = ch;
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do {
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if (ssh_recv(&ch, 1) <= 0)
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if (ssh_scp_recv(&ch, 1) <= 0)
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bump("Lost connection");
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buf[i++] = ch;
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} while (i < sizeof(buf) && ch != '\n');
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@ -468,13 +476,13 @@ static void sink(char *targ)
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case '\02': /* fatal error */
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bump("%s", buf+1);
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case 'E':
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ssh_send("", 1);
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ssh_scp_send("", 1);
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return;
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case 'T':
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if (sscanf(buf, "T%ld %*d %ld %*d",
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&mtime, &atime) == 2) {
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settime = 1;
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ssh_send("", 1);
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ssh_scp_send("", 1);
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goto gottime;
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}
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bump("Protocol error: Illegal time format");
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@ -524,7 +532,7 @@ static void sink(char *targ)
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continue;
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}
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ssh_send("", 1);
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ssh_scp_send("", 1);
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if (statistics) {
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stat_bytes = 0;
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@ -542,7 +550,7 @@ static void sink(char *targ)
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char transbuf[4096];
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DWORD j, k = 4096;
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if (i + k > size) k = size - i;
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if (ssh_recv(transbuf, k) == 0)
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if (ssh_scp_recv(transbuf, k) == 0)
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bump("Lost connection");
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if (wrerror) continue;
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if (! WriteFile(f, transbuf, k, &j, NULL) || j != k) {
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@ -577,7 +585,7 @@ static void sink(char *targ)
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run_err("%s: Write error", namebuf);
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continue;
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}
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ssh_send("", 1);
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ssh_scp_send("", 1);
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}
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}
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@ -778,7 +786,7 @@ static void get_dir_list(int argc, char *argv[])
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do_cmd(host, user, cmd);
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sfree(cmd);
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while (ssh_recv(&c, 1) > 0)
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while (ssh_scp_recv(&c, 1) > 0)
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fputc(c, stdout); /* thank heavens for buffered I/O */
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}
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@ -826,13 +834,17 @@ int main(int argc, char *argv[])
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int i;
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int list = 0;
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default_protocol = PROT_TELNET;
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scp_flags = SCP_FLAG;
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ssh_get_password = &get_password;
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init_winsock();
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for (i = 1; i < argc; i++) {
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if (argv[i][0] != '-')
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break;
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if (strcmp(argv[i], "-v") == 0)
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verbose = 1;
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verbose = 1, scp_flags |= SCP_VERBOSE;
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else if (strcmp(argv[i], "-r") == 0)
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recursive = 1;
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else if (strcmp(argv[i], "-p") == 0)
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@ -876,8 +888,8 @@ int main(int argc, char *argv[])
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if (connection_open) {
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char ch;
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ssh_send_eof();
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ssh_recv(&ch, 1);
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ssh_scp_send_eof();
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ssh_scp_recv(&ch, 1);
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}
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WSACleanup();
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random_save_seed();
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@ -886,3 +898,4 @@ int main(int argc, char *argv[])
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}
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/* end */
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34
scp.h
34
scp.h
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@ -1,29 +1,17 @@
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/*
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* scp.h
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* Joris van Rantwijk, Aug 1999.
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* Joris van Rantwijk, Aug 1999, Jun 2000.
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*/
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#define SCP_FLAG 1
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#define SCP_VERBOSE 2
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#define IS_SCP ((scp_flags & SCP_FLAG) != 0)
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/*
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* Exported from scp.c
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*/
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extern int verbose;
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void ssh_get_password(char *prompt, char *str, int maxlen);
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/*
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* Exported from scpssh.c
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*/
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char * ssh_init(char *host, int port, char *cmd, char **realhost);
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int ssh_recv(unsigned char *buf, int len);
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void ssh_send(unsigned char *buf, int len);
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void ssh_send_eof(void);
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/*
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* Exports from mscrypto.c
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*/
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#ifdef MSCRYPTOAPI
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int crypto_startup();
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void crypto_wrapup();
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#endif
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/* Exported from ssh.c */
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extern int scp_flags;
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extern void (*ssh_get_password)(const char *prompt, char *str, int maxlen);
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char * ssh_scp_init(char *host, int port, char *cmd, char **realhost);
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int ssh_scp_recv(unsigned char *buf, int len);
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void ssh_scp_send(unsigned char *buf, int len);
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void ssh_scp_send_eof(void);
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620
scpssh.c
620
scpssh.c
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@ -1,620 +0,0 @@
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/*
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* scpssh.c - SSH implementation for PuTTY Secure Copy
|
||||
* Joris van Rantwijk, Aug 1999.
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* Based on PuTTY ssh.c by Simon Tatham.
|
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*/
|
||||
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#include <stdio.h>
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||||
#include <stdlib.h>
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||||
#include <string.h>
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||||
#include <winsock.h>
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||||
|
||||
#include "putty.h"
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#include "ssh.h"
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#include "scp.h"
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|
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#define SSH_MSG_DISCONNECT 1
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||||
#define SSH_SMSG_PUBLIC_KEY 2
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#define SSH_CMSG_SESSION_KEY 3
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||||
#define SSH_CMSG_USER 4
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||||
#define SSH_CMSG_AUTH_PASSWORD 9
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||||
#define SSH_CMSG_EXEC_CMD 13
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||||
#define SSH_SMSG_SUCCESS 14
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||||
#define SSH_SMSG_FAILURE 15
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||||
#define SSH_CMSG_STDIN_DATA 16
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||||
#define SSH_SMSG_STDOUT_DATA 17
|
||||
#define SSH_SMSG_STDERR_DATA 18
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||||
#define SSH_CMSG_EOF 19
|
||||
#define SSH_SMSG_EXIT_STATUS 20
|
||||
#define SSH_CMSG_EXIT_CONFIRMATION 33
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||||
#define SSH_MSG_IGNORE 32
|
||||
#define SSH_MSG_DEBUG 36
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||||
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#define GET_32BIT(cp) \
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(((unsigned long)(unsigned char)(cp)[0] << 24) | \
|
||||
((unsigned long)(unsigned char)(cp)[1] << 16) | \
|
||||
((unsigned long)(unsigned char)(cp)[2] << 8) | \
|
||||
((unsigned long)(unsigned char)(cp)[3]))
|
||||
|
||||
#define PUT_32BIT(cp, value) { \
|
||||
(cp)[0] = (unsigned char)((value) >> 24); \
|
||||
(cp)[1] = (unsigned char)((value) >> 16); \
|
||||
(cp)[2] = (unsigned char)((value) >> 8); \
|
||||
(cp)[3] = (unsigned char)(value); }
|
||||
|
||||
static SOCKET s = INVALID_SOCKET;
|
||||
|
||||
static unsigned char session_key[32];
|
||||
static struct ssh_cipher *cipher = NULL;
|
||||
|
||||
static char *savedhost;
|
||||
|
||||
struct Packet {
|
||||
long length;
|
||||
int type;
|
||||
unsigned long crc;
|
||||
unsigned char *data;
|
||||
unsigned char *body;
|
||||
long maxlen;
|
||||
};
|
||||
|
||||
static struct Packet pktin = { 0, 0, 0, NULL, 0 };
|
||||
static struct Packet pktout = { 0, 0, 0, NULL, 0 };
|
||||
|
||||
|
||||
static void s_write (char *buf, int len) {
|
||||
while (len > 0) {
|
||||
int i = send (s, buf, len, 0);
|
||||
noise_ultralight(i);
|
||||
if (i <= 0)
|
||||
fatalbox("Lost connection while sending");
|
||||
len -= i, buf += i;
|
||||
}
|
||||
}
|
||||
|
||||
static int s_read (char *buf, int len) {
|
||||
int ret = 0;
|
||||
while (len > 0) {
|
||||
int i = recv (s, buf, len, 0);
|
||||
noise_ultralight(i);
|
||||
if (i > 0)
|
||||
len -= i, buf += i, ret += i;
|
||||
else
|
||||
return i;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read and decrypt one incoming SSH packet.
|
||||
*/
|
||||
static void get_packet(void)
|
||||
{
|
||||
unsigned char buf[4];
|
||||
int ret;
|
||||
int len, pad, biglen;
|
||||
unsigned long realcrc, gotcrc;
|
||||
|
||||
next_packet:
|
||||
|
||||
pktin.type = 0;
|
||||
pktin.length = 0;
|
||||
|
||||
ret = s_read(buf, 4);
|
||||
if (ret != 4) {
|
||||
closesocket(s);
|
||||
s = INVALID_SOCKET;
|
||||
return;
|
||||
}
|
||||
|
||||
len = GET_32BIT(buf);
|
||||
|
||||
#ifdef FWHACK
|
||||
if (len == 0x52656d6f) {
|
||||
len = 0x300;
|
||||
}
|
||||
#endif
|
||||
|
||||
pad = 8 - (len % 8);
|
||||
biglen = len + pad;
|
||||
len -= 5; /* type and CRC */
|
||||
|
||||
pktin.length = len;
|
||||
if (pktin.maxlen < biglen) {
|
||||
pktin.maxlen = biglen;
|
||||
#ifdef MSCRYPTOAPI
|
||||
/* allocate enough buffer space for extra block
|
||||
* for MS CryptEncrypt() */
|
||||
pktin.data = (pktin.data == NULL) ?
|
||||
smalloc(biglen+8) : srealloc(pktin.data, biglen+8);
|
||||
#else
|
||||
pktin.data = (pktin.data == NULL) ?
|
||||
smalloc(biglen) : srealloc(pktin.data, biglen);
|
||||
#endif
|
||||
}
|
||||
|
||||
ret = s_read(pktin.data, biglen);
|
||||
if (ret != biglen) {
|
||||
closesocket(s);
|
||||
s = INVALID_SOCKET;
|
||||
return;
|
||||
}
|
||||
|
||||
if (cipher)
|
||||
cipher->decrypt(pktin.data, biglen);
|
||||
|
||||
pktin.type = pktin.data[pad];
|
||||
pktin.body = pktin.data + pad + 1;
|
||||
|
||||
realcrc = crc32(pktin.data, biglen-4);
|
||||
gotcrc = (pktin.data[biglen-4] << 24);
|
||||
gotcrc |= (pktin.data[biglen-3] << 16);
|
||||
gotcrc |= (pktin.data[biglen-2] << 8);
|
||||
gotcrc |= (pktin.data[biglen-1] << 0);
|
||||
if (gotcrc != realcrc) {
|
||||
fatalbox("Incorrect CRC received on packet");
|
||||
}
|
||||
|
||||
if (pktin.type == SSH_MSG_DEBUG) {
|
||||
if (verbose) {
|
||||
int len = GET_32BIT(pktin.body);
|
||||
fprintf(stderr, "Remote: ");
|
||||
fwrite(pktin.body + 4, len, 1, stderr);
|
||||
fprintf(stderr, "\n");
|
||||
}
|
||||
goto next_packet;
|
||||
}
|
||||
if (pktin.type == SSH_MSG_IGNORE) {
|
||||
goto next_packet;
|
||||
}
|
||||
}
|
||||
|
||||
static void s_wrpkt_start(int type, int len) {
|
||||
int pad, biglen;
|
||||
|
||||
len += 5; /* type and CRC */
|
||||
pad = 8 - (len%8);
|
||||
biglen = len + pad;
|
||||
|
||||
pktout.length = len-5;
|
||||
if (pktout.maxlen < biglen) {
|
||||
pktout.maxlen = biglen;
|
||||
#ifdef MSCRYPTOAPI
|
||||
/* Allocate enough buffer space for extra block
|
||||
* for MS CryptEncrypt() */
|
||||
pktout.data = (pktout.data == NULL ? malloc(biglen+8) :
|
||||
realloc(pktout.data, biglen+8));
|
||||
#else
|
||||
pktout.data = (pktout.data == NULL ? malloc(biglen+4) :
|
||||
realloc(pktout.data, biglen+4));
|
||||
#endif
|
||||
if (!pktout.data)
|
||||
fatalbox("Out of memory");
|
||||
}
|
||||
|
||||
pktout.type = type;
|
||||
pktout.body = pktout.data+4+pad+1;
|
||||
}
|
||||
|
||||
static void s_wrpkt(void) {
|
||||
int pad, len, biglen, i;
|
||||
unsigned long crc;
|
||||
|
||||
len = pktout.length + 5; /* type and CRC */
|
||||
pad = 8 - (len%8);
|
||||
biglen = len + pad;
|
||||
|
||||
pktout.body[-1] = pktout.type;
|
||||
for (i=0; i<pad; i++)
|
||||
pktout.data[i+4] = random_byte();
|
||||
crc = crc32(pktout.data+4, biglen-4);
|
||||
PUT_32BIT(pktout.data+biglen, crc);
|
||||
PUT_32BIT(pktout.data, len);
|
||||
|
||||
if (cipher)
|
||||
cipher->encrypt(pktout.data+4, biglen);
|
||||
|
||||
s_write(pktout.data, biglen+4);
|
||||
}
|
||||
|
||||
static int do_ssh_init(void) {
|
||||
char c;
|
||||
char version[10];
|
||||
char vstring[40];
|
||||
int i;
|
||||
|
||||
#ifdef FWHACK
|
||||
i = 0;
|
||||
while (s_read(&c, 1) == 1) {
|
||||
if (c == 'S' && i < 2) i++;
|
||||
else if (c == 'S' && i == 2) i = 2;
|
||||
else if (c == 'H' && i == 2) break;
|
||||
else i = 0;
|
||||
}
|
||||
#else
|
||||
if (s_read(&c,1) != 1 || c != 'S') return 0;
|
||||
if (s_read(&c,1) != 1 || c != 'S') return 0;
|
||||
if (s_read(&c,1) != 1 || c != 'H') return 0;
|
||||
#endif
|
||||
if (s_read(&c,1) != 1 || c != '-') return 0;
|
||||
i = 0;
|
||||
while (1) {
|
||||
if (s_read(&c,1) != 1)
|
||||
return 0;
|
||||
if (i >= 0) {
|
||||
if (c == '-') {
|
||||
version[i] = '\0';
|
||||
i = -1;
|
||||
} else if (i < sizeof(version)-1)
|
||||
version[i++] = c;
|
||||
}
|
||||
else if (c == '\n')
|
||||
break;
|
||||
}
|
||||
|
||||
sprintf(vstring, "SSH-%s-7.7.7\n",
|
||||
(strcmp(version, "1.5") <= 0 ? version : "1.5"));
|
||||
s_write(vstring, strlen(vstring));
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Login on the server and request execution of the command.
|
||||
*/
|
||||
static void ssh_login(char *username, char *cmd)
|
||||
{
|
||||
int i, j, len;
|
||||
unsigned char session_id[16];
|
||||
unsigned char *rsabuf, *keystr1, *keystr2;
|
||||
unsigned char cookie[8];
|
||||
struct RSAKey servkey, hostkey;
|
||||
struct MD5Context md5c;
|
||||
unsigned long supported_ciphers_mask;
|
||||
int cipher_type;
|
||||
|
||||
extern struct ssh_cipher ssh_3des;
|
||||
extern struct ssh_cipher ssh_blowfish;
|
||||
|
||||
get_packet();
|
||||
|
||||
if (pktin.type != SSH_SMSG_PUBLIC_KEY)
|
||||
fatalbox("Public key packet not received");
|
||||
|
||||
memcpy(cookie, pktin.body, 8);
|
||||
|
||||
MD5Init(&md5c);
|
||||
|
||||
i = makekey(pktin.body+8, &servkey, &keystr1);
|
||||
j = makekey(pktin.body+8+i, &hostkey, &keystr2);
|
||||
|
||||
supported_ciphers_mask = GET_32BIT(pktin.body+12+i+j);
|
||||
|
||||
MD5Update(&md5c, keystr2, hostkey.bytes);
|
||||
MD5Update(&md5c, keystr1, servkey.bytes);
|
||||
MD5Update(&md5c, pktin.body, 8);
|
||||
|
||||
MD5Final(session_id, &md5c);
|
||||
|
||||
for (i=0; i<32; i++)
|
||||
session_key[i] = random_byte();
|
||||
|
||||
len = (hostkey.bytes > servkey.bytes ? hostkey.bytes : servkey.bytes);
|
||||
|
||||
rsabuf = malloc(len);
|
||||
if (!rsabuf)
|
||||
fatalbox("Out of memory");
|
||||
|
||||
/*
|
||||
* Verify the host key.
|
||||
*/
|
||||
{
|
||||
/*
|
||||
* First format the key into a string.
|
||||
*/
|
||||
int len = rsastr_len(&hostkey);
|
||||
char *keystr = malloc(len);
|
||||
if (!keystr)
|
||||
fatalbox("Out of memory");
|
||||
rsastr_fmt(keystr, &hostkey);
|
||||
verify_ssh_host_key(savedhost, keystr);
|
||||
free(keystr);
|
||||
}
|
||||
|
||||
for (i=0; i<32; i++) {
|
||||
rsabuf[i] = session_key[i];
|
||||
if (i < 16)
|
||||
rsabuf[i] ^= session_id[i];
|
||||
}
|
||||
|
||||
if (hostkey.bytes > servkey.bytes) {
|
||||
rsaencrypt(rsabuf, 32, &servkey);
|
||||
rsaencrypt(rsabuf, servkey.bytes, &hostkey);
|
||||
} else {
|
||||
rsaencrypt(rsabuf, 32, &hostkey);
|
||||
rsaencrypt(rsabuf, hostkey.bytes, &servkey);
|
||||
}
|
||||
|
||||
cipher_type = cfg.cipher == CIPHER_BLOWFISH ? SSH_CIPHER_BLOWFISH :
|
||||
SSH_CIPHER_3DES;
|
||||
if ((supported_ciphers_mask & (1 << cipher_type)) == 0) {
|
||||
fprintf(stderr, "Selected cipher not supported, falling back to 3DES\n");
|
||||
cipher_type = SSH_CIPHER_3DES;
|
||||
}
|
||||
|
||||
s_wrpkt_start(SSH_CMSG_SESSION_KEY, len+15);
|
||||
pktout.body[0] = cipher_type;
|
||||
memcpy(pktout.body+1, cookie, 8);
|
||||
pktout.body[9] = (len*8) >> 8;
|
||||
pktout.body[10] = (len*8) & 0xFF;
|
||||
memcpy(pktout.body+11, rsabuf, len);
|
||||
pktout.body[len+11] = pktout.body[len+12] = 0; /* protocol flags */
|
||||
pktout.body[len+13] = pktout.body[len+14] = 0;
|
||||
s_wrpkt();
|
||||
|
||||
free(rsabuf);
|
||||
|
||||
cipher = cipher_type == SSH_CIPHER_BLOWFISH ? &ssh_blowfish :
|
||||
&ssh_3des;
|
||||
cipher->sesskey(session_key);
|
||||
|
||||
get_packet();
|
||||
|
||||
if (pktin.type != SSH_SMSG_SUCCESS)
|
||||
fatalbox("Encryption not successfully enabled");
|
||||
|
||||
if (verbose)
|
||||
fprintf(stderr, "Logging in as \"%s\".\n", username);
|
||||
s_wrpkt_start(SSH_CMSG_USER, 4+strlen(username));
|
||||
pktout.body[0] = pktout.body[1] = pktout.body[2] = 0;
|
||||
pktout.body[3] = strlen(username);
|
||||
memcpy(pktout.body+4, username, strlen(username));
|
||||
s_wrpkt();
|
||||
|
||||
get_packet();
|
||||
|
||||
while (pktin.type == SSH_SMSG_FAILURE) {
|
||||
char password[100];
|
||||
char prompt[200];
|
||||
sprintf(prompt, "%s@%s's password: ", username, savedhost);
|
||||
ssh_get_password(prompt, password, 100);
|
||||
s_wrpkt_start(SSH_CMSG_AUTH_PASSWORD, 4+strlen(password));
|
||||
pktout.body[0] = pktout.body[1] = pktout.body[2] = 0;
|
||||
pktout.body[3] = strlen(password);
|
||||
memcpy(pktout.body+4, password, strlen(password));
|
||||
s_wrpkt();
|
||||
memset(password, 0, strlen(password));
|
||||
get_packet();
|
||||
if (pktin.type == SSH_SMSG_FAILURE) {
|
||||
fprintf(stderr, "Access denied\n");
|
||||
} else if (pktin.type != SSH_SMSG_SUCCESS) {
|
||||
fatalbox("Strange packet received, type %d", pktin.type);
|
||||
}
|
||||
}
|
||||
|
||||
/* Execute command */
|
||||
if (verbose)
|
||||
fprintf(stderr, "Sending command: %s\n", cmd);
|
||||
i = strlen(cmd);
|
||||
s_wrpkt_start(SSH_CMSG_EXEC_CMD, 4+i);
|
||||
PUT_32BIT(pktout.body, i);
|
||||
memcpy(pktout.body+4, cmd, i);
|
||||
s_wrpkt();
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Receive a block of data over the SSH link. Block until
|
||||
* all data is available. Return nr of bytes read (0 if lost connection).
|
||||
*/
|
||||
int ssh_recv(unsigned char *buf, int len)
|
||||
{
|
||||
static int pending_input_len = 0;
|
||||
static unsigned char *pending_input_ptr;
|
||||
int to_read = len;
|
||||
|
||||
if (pending_input_len >= to_read) {
|
||||
memcpy(buf, pending_input_ptr, to_read);
|
||||
pending_input_ptr += to_read;
|
||||
pending_input_len -= to_read;
|
||||
return len;
|
||||
}
|
||||
|
||||
if (pending_input_len > 0) {
|
||||
memcpy(buf, pending_input_ptr, pending_input_len);
|
||||
buf += pending_input_len;
|
||||
to_read -= pending_input_len;
|
||||
pending_input_len = 0;
|
||||
}
|
||||
|
||||
if (s == INVALID_SOCKET)
|
||||
return 0;
|
||||
while (to_read > 0) {
|
||||
get_packet();
|
||||
if (s == INVALID_SOCKET)
|
||||
return 0;
|
||||
if (pktin.type == SSH_SMSG_STDOUT_DATA) {
|
||||
int plen = GET_32BIT(pktin.body);
|
||||
if (plen+4 != pktin.length) {
|
||||
fprintf(stderr, "Received data packet with bogus string length"
|
||||
", ignoring\n");
|
||||
} else if (plen <= to_read) {
|
||||
memcpy(buf, pktin.body + 4, plen);
|
||||
buf += plen;
|
||||
to_read -= plen;
|
||||
} else {
|
||||
memcpy(buf, pktin.body + 4, to_read);
|
||||
pending_input_len = plen - to_read;
|
||||
pending_input_ptr = pktin.body + 4 + to_read;
|
||||
to_read = 0;
|
||||
}
|
||||
} else if (pktin.type == SSH_SMSG_STDERR_DATA) {
|
||||
int plen = GET_32BIT(pktin.body);
|
||||
if (plen+4 != pktin.length) {
|
||||
fprintf(stderr, "Received data packet with bogus string length"
|
||||
", ignoring\n");
|
||||
} else
|
||||
fwrite(pktin.body + 4, plen, 1, stderr);
|
||||
} else if (pktin.type == SSH_MSG_DISCONNECT) {
|
||||
} else if (pktin.type == SSH_SMSG_SUCCESS ||
|
||||
pktin.type == SSH_SMSG_FAILURE) {
|
||||
} else if (pktin.type == SSH_SMSG_EXIT_STATUS) {
|
||||
if (verbose)
|
||||
fprintf(stderr, "Remote exit status %d\n",
|
||||
GET_32BIT(pktin.body));
|
||||
s_wrpkt_start(SSH_CMSG_EXIT_CONFIRMATION, 0);
|
||||
s_wrpkt();
|
||||
if (verbose)
|
||||
fprintf(stderr, "Closing connection\n");
|
||||
closesocket(s);
|
||||
s = INVALID_SOCKET;
|
||||
}
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Send a block of data over the SSH link.
|
||||
* Block until all data is sent.
|
||||
*/
|
||||
void ssh_send(unsigned char *buf, int len)
|
||||
{
|
||||
if (s == INVALID_SOCKET)
|
||||
return;
|
||||
s_wrpkt_start(SSH_CMSG_STDIN_DATA, 4 + len);
|
||||
PUT_32BIT(pktout.body, len);
|
||||
memcpy(pktout.body + 4, buf, len);
|
||||
s_wrpkt();
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Send an EOF notification to the server.
|
||||
*/
|
||||
void ssh_send_eof(void)
|
||||
{
|
||||
if (s == INVALID_SOCKET)
|
||||
return;
|
||||
s_wrpkt_start(SSH_CMSG_EOF, 0);
|
||||
s_wrpkt();
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Set up the connection, login on the remote host and
|
||||
* start execution of a command.
|
||||
*
|
||||
* Returns an error message, or NULL on success.
|
||||
*
|
||||
* Also places the canonical host name into `realhost'.
|
||||
*/
|
||||
char *ssh_init(char *host, int port, char *cmd, char **realhost) {
|
||||
SOCKADDR_IN addr;
|
||||
struct hostent *h;
|
||||
unsigned long a;
|
||||
#ifdef FWHACK
|
||||
char *FWhost;
|
||||
int FWport;
|
||||
#endif
|
||||
|
||||
#ifdef MSCRYPTOAPI
|
||||
if(crypto_startup() == 0)
|
||||
return "Microsoft high encryption pack not installed!";
|
||||
#endif
|
||||
|
||||
savedhost = malloc(1+strlen(host));
|
||||
if (!savedhost)
|
||||
fatalbox("Out of memory");
|
||||
strcpy(savedhost, host);
|
||||
|
||||
#ifdef FWHACK
|
||||
FWhost = host;
|
||||
FWport = port;
|
||||
host = FWSTR;
|
||||
port = 23;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Try to find host.
|
||||
*/
|
||||
if ( (a = inet_addr(host)) == (unsigned long) INADDR_NONE) {
|
||||
if ( (h = gethostbyname(host)) == NULL)
|
||||
switch (WSAGetLastError()) {
|
||||
case WSAENETDOWN: return "Network is down";
|
||||
case WSAHOST_NOT_FOUND: case WSANO_DATA:
|
||||
return "Host does not exist";
|
||||
case WSATRY_AGAIN: return "Host not found";
|
||||
default: return "gethostbyname: unknown error";
|
||||
}
|
||||
memcpy (&a, h->h_addr, sizeof(a));
|
||||
*realhost = h->h_name;
|
||||
} else
|
||||
*realhost = host;
|
||||
#ifdef FWHACK
|
||||
*realhost = FWhost;
|
||||
#endif
|
||||
a = ntohl(a);
|
||||
|
||||
if (port < 0)
|
||||
port = 22; /* default ssh port */
|
||||
|
||||
/*
|
||||
* Open socket.
|
||||
*/
|
||||
s = socket(AF_INET, SOCK_STREAM, 0);
|
||||
if (s == INVALID_SOCKET)
|
||||
switch (WSAGetLastError()) {
|
||||
case WSAENETDOWN: return "Network is down";
|
||||
case WSAEAFNOSUPPORT: return "TCP/IP support not present";
|
||||
default: return "socket(): unknown error";
|
||||
}
|
||||
|
||||
/*
|
||||
* Bind to local address.
|
||||
*/
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_addr.s_addr = htonl(INADDR_ANY);
|
||||
addr.sin_port = htons(0);
|
||||
if (bind (s, (struct sockaddr *)&addr, sizeof(addr)) == SOCKET_ERROR)
|
||||
switch (WSAGetLastError()) {
|
||||
case WSAENETDOWN: return "Network is down";
|
||||
default: return "bind(): unknown error";
|
||||
}
|
||||
|
||||
/*
|
||||
* Connect to remote address.
|
||||
*/
|
||||
addr.sin_addr.s_addr = htonl(a);
|
||||
addr.sin_port = htons((short)port);
|
||||
if (connect (s, (struct sockaddr *)&addr, sizeof(addr)) == SOCKET_ERROR)
|
||||
switch (WSAGetLastError()) {
|
||||
case WSAENETDOWN: return "Network is down";
|
||||
case WSAECONNREFUSED: return "Connection refused";
|
||||
case WSAENETUNREACH: return "Network is unreachable";
|
||||
case WSAEHOSTUNREACH: return "No route to host";
|
||||
default: return "connect(): unknown error";
|
||||
}
|
||||
|
||||
#ifdef FWHACK
|
||||
send(s, "connect ", 8, 0);
|
||||
send(s, FWhost, strlen(FWhost), 0);
|
||||
{
|
||||
char buf[20];
|
||||
sprintf(buf, " %d\n", FWport);
|
||||
send (s, buf, strlen(buf), 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
random_init();
|
||||
|
||||
if (!do_ssh_init())
|
||||
return "Protocol initialisation error";
|
||||
|
||||
ssh_login(cfg.username, cmd);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* end */
|
||||
884
ssh.c
884
ssh.c
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