First stab at the ability to compile puttytel.exe, an SSH-free

variant which is patent-safe in the US and legal in France and
Russia. This is a horrible hack in some ways: it's shown up serious
deficiencies in the module boundaries. Needs further work, probably
once the SSH implementations are recombined.

[originally from svn r410]

Makefile

@@ -37,58 +37,80 @@ CFLAGS = /nologo /W3 /YX /O2 /Yd /D_WINDOWS /DDEBUG /ML /Fd
 OBJ=obj
 RES=res
 
+##-- objects putty puttytel
+GOBJS1 = window.$(OBJ) windlg.$(OBJ) terminal.$(OBJ) telnet.$(OBJ) raw.$(OBJ)
+GOBJS2 = xlat.$(OBJ) ldisc.$(OBJ) sizetip.$(OBJ)
 ##-- objects putty
-POBJS1 = window.$(OBJ) windlg.$(OBJ) terminal.$(OBJ) telnet.$(OBJ) raw.$(OBJ)
-POBJS2 = xlat.$(OBJ) ldisc.$(OBJ) sizetip.$(OBJ) ssh.$(OBJ)
+POBJS = ssh.$(OBJ) be_all.$(OBJ)
+##-- objects puttytel
+TOBJS = be_nossh.$(OBJ)
 ##-- objects pscp
-SOBJS = scp.$(OBJ) windlg.$(OBJ) scpssh.$(OBJ)
+SOBJS = scp.$(OBJ) windlg.$(OBJ) scpssh.$(OBJ) be_none.$(OBJ)
+##-- objects putty puttytel pscp
+MOBJS = misc.$(OBJ) version.$(OBJ)
 ##-- objects putty pscp
-OBJS1 = misc.$(OBJ) noise.$(OBJ)
-OBJS2 = sshcrc.$(OBJ) sshdes.$(OBJ) sshmd5.$(OBJ) sshrsa.$(OBJ) sshrand.$(OBJ)
-OBJS3 = sshsha.$(OBJ) sshblowf.$(OBJ) version.$(OBJ)
+OBJS1 = sshcrc.$(OBJ) sshdes.$(OBJ) sshmd5.$(OBJ) sshrsa.$(OBJ) sshrand.$(OBJ)
+OBJS2 = sshsha.$(OBJ) sshblowf.$(OBJ) noise.$(OBJ)
 ##-- resources putty
 PRESRC = win_res.$(RES)
+##-- resources puttytel
+TRESRC = nossh_res.$(RES)
 ##-- resources pscp
 SRESRC = scp.$(RES)
 ##--
 
 ##-- gui-apps
 # putty
+# puttytel
 ##-- console-apps
 # pscp
 ##--
 
 LIBS1 = advapi32.lib user32.lib gdi32.lib
 LIBS2 = wsock32.lib comctl32.lib comdlg32.lib
 
-all: putty.exe pscp.exe
-
-putty.exe: $(POBJS1) $(POBJS2) $(OBJS1) $(OBJS2) $(OBJS3) $(PRESRC) link.rsp
-	link /debug -out:putty.exe @link.rsp
-
-pscp.exe: $(SOBJS) $(OBJS1) $(OBJS2) $(OBJS3) $(SRESRC) scp.rsp
-	link /debug -out:pscp.exe @scp.rsp
-
-link.rsp: makefile
-	echo /nologo /subsystem:windows > link.rsp
-	echo $(POBJS1) >> link.rsp
-	echo $(POBJS2) >> link.rsp
-	echo $(OBJS1) >> link.rsp
-	echo $(OBJS2) >> link.rsp
-	echo $(OBJS3) >> link.rsp
-	echo $(PRESRC) >> link.rsp
-	echo $(LIBS1) >> link.rsp
-	echo $(LIBS2) >> link.rsp
-
-scp.rsp: makefile
-	echo /nologo /subsystem:console > scp.rsp
-	echo $(SOBJS) >> scp.rsp
-	echo $(OBJS1) >> scp.rsp
-	echo $(OBJS2) >> scp.rsp
-	echo $(OBJS3) >> scp.rsp
-	echo $(SRESRC) >> scp.rsp
-	echo $(LIBS1) >> scp.rsp
-	echo $(LIBS2) >> scp.rsp
+all: putty.exe puttytel.exe pscp.exe
+
+putty.exe: $(GOBJS1) $(GOBJS2) $(POBJS) $(MOBJS) $(OBJS1) $(OBJS2) $(PRESRC) putty.rsp
+	link /debug -out:putty.exe @putty.rsp
+
+puttytel.exe: $(GOBJS1) $(GOBJS2) $(TOBJS) $(MOBJS) $(PRESRC) puttytel.rsp
+	link /debug -out:puttytel.exe @puttytel.rsp
+
+pscp.exe: $(SOBJS) $(OBJS1) $(OBJS2) $(OBJS3) $(SRESRC) pscp.rsp
+	link /debug -out:pscp.exe @pscp.rsp
+
+putty.rsp: makefile
+	echo /nologo /subsystem:windows > putty.rsp
+	echo $(GOBJS1) >> putty.rsp
+	echo $(GOBJS2) >> putty.rsp
+	echo $(POBJS) >> putty.rsp
+	echo $(MOBJS) >> putty.rsp
+	echo $(OBJS1) >> putty.rsp
+	echo $(OBJS2) >> putty.rsp
+	echo $(PRESRC) >> putty.rsp
+	echo $(LIBS1) >> putty.rsp
+	echo $(LIBS2) >> putty.rsp
+
+puttytel.rsp: makefile
+	echo /nologo /subsystem:windows > puttytel.rsp
+	echo $(GOBJS1) >> puttytel.rsp
+	echo $(GOBJS2) >> puttytel.rsp
+	echo $(TOBJS) >> puttytel.rsp
+	echo $(MOBJS) >> puttytel.rsp
+	echo $(TRESRC) >> puttytel.rsp
+	echo $(LIBS1) >> puttytel.rsp
+	echo $(LIBS2) >> puttytel.rsp
+
+pscp.rsp: makefile
+	echo /nologo /subsystem:console > pscp.rsp
+	echo $(SOBJS) >> pscp.rsp
+	echo $(MOBJS) >> pscp.rsp
+	echo $(OBJS1) >> pscp.rsp
+	echo $(OBJS2) >> pscp.rsp
+	echo $(SRESRC) >> pscp.rsp
+	echo $(LIBS1) >> pscp.rsp
+	echo $(LIBS2) >> pscp.rsp
 
 ##-- dependencies
 window.$(OBJ): window.c putty.h win_res.h
@@ -112,6 +134,9 @@ sshblowf.$(OBJ): sshblowf.c ssh.h
 scp.$(OBJ): scp.c putty.h scp.h
 scpssh.$(OBJ): scpssh.c putty.h ssh.h scp.h
 version.$(OBJ): version.c
+be_all.$(OBJ): be_all.c
+be_nossh.$(OBJ): be_nossh.c
+be_none.$(OBJ): be_none.c
 ##--
 
 # Hack to force version.obj to be rebuilt always
@@ -126,6 +151,12 @@ win_res.$(RES): win_res.rc win_res.h putty.ico
 win_res.$(RES):
 	rc $(FWHACK) $(RCFL) -r -DWIN32 -D_WIN32 -DWINVER=0x0400 win_res.rc
 
+##-- dependencies
+nossh_res.$(RES): nossh_res.rc win_res.h putty.ico
+##--
+nossh_res.$(RES):
+	rc $(FWHACK) $(RCFL) -r -DWIN32 -D_WIN32 -DWINVER=0x0400 nossh_res.rc
+
 ##-- dependencies
 scp.$(RES): scp.rc scp.ico
 ##--

be_all.c

@@ -0,0 +1,15 @@
+/*
+ * Linking module for PuTTY proper: list the available backends
+ * including ssh.
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include "putty.h"
+
+struct backend_list backends[] = {
+    {PROT_SSH, "ssh", &ssh_backend},
+    {PROT_TELNET, "telnet", &telnet_backend},
+    {PROT_RAW, "raw", &raw_backend},
+    {0, NULL}
+};

be_none.c

@@ -0,0 +1,13 @@
+/*
+ * Linking module for PSCP: list no available backends. This is
+ * only present to satisfy linker requirements. I should really
+ * untangle the whole lot a bit better.
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include "putty.h"
+
+struct backend_list backends[] = {
+    {0, NULL}
+};

be_nossh.c

@@ -0,0 +1,23 @@
+/*
+ * Linking module for PuTTYtel: list the available backends not
+ * including ssh.
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include "putty.h"
+
+struct backend_list backends[] = {
+    {PROT_TELNET, "telnet", &telnet_backend},
+    {PROT_RAW, "raw", &raw_backend},
+    {0, NULL}
+};
+
+/*
+ * Stub implementations of functions not used in non-ssh versions.
+ */
+void random_save_seed(void) {
+}
+
+void noise_ultralight(DWORD data) {
+}

nossh_res.rc

@@ -0,0 +1,3 @@
+/* Stub rc file for the PuTTYtel ssh-free binary */
+#define NO_SSH
+#include "win_res.rc"

putty.h

@@ -104,6 +104,12 @@ typedef struct {
 
 GLOBAL Backend *back;
 
+GLOBAL struct backend_list {
+    int protocol;
+    char *name;
+    Backend *backend;
+} backends[];
+
 typedef struct {
     void (*send) (char *buf, int len);
 } Ldisc;
@@ -215,7 +221,7 @@ void do_defaults (char *);
 void logevent (char *);
 void showeventlog (HWND);
 void showabout (HWND);
-void verify_ssh_host_key(char *host, struct RSAKey *key);
+void verify_ssh_host_key(char *host, char *keystr);
 void get_sesslist(int allocate);
 
 GLOBAL int nsessions;

scpssh.c

@@ -281,7 +281,21 @@ static void ssh_login(char *username, char *cmd)
     if (!rsabuf)
 	fatalbox("Out of memory");
 
-    verify_ssh_host_key(savedhost, &hostkey);
+    /*
+     * 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];

ssh.c

@@ -385,7 +385,21 @@ static void ssh_protocol(unsigned char *in, int inlen, int ispkt) {
     if (!rsabuf)
 	fatalbox("Out of memory");
 
-    verify_ssh_host_key(savedhost, &hostkey);
+    /*
+     * 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];

win_res.rc

@@ -75,7 +75,9 @@ BEGIN
     RTEXT "Protocol:", IDC0_PROTSTATIC, 3, 29, 52, 8
     AUTORADIOBUTTON "&Raw", IDC0_PROTRAW, 61, 29, 33, 10, WS_GROUP
     AUTORADIOBUTTON "&Telnet", IDC0_PROTTELNET, 96, 29, 33, 10
+#ifndef NO_SSH
     AUTORADIOBUTTON "SS&H", IDC0_PROTSSH, 132, 29, 33, 10
+#endif
 #endif
     LTEXT "Stor&ed Sessions", IDC0_SESSSTATIC, 3, 40, 122, 8
     EDITTEXT IDC0_SESSEDIT, 3, 48, 122, 12, ES_AUTOHSCROLL

windlg.c

@@ -116,9 +116,13 @@ static void save_settings (char *section, int do_host) {
     if (do_host) {
 	wpps (sesskey, "HostName", cfg.host);
 	wppi (sesskey, "PortNumber", cfg.port);
-	wpps (sesskey, "Protocol",
-	      cfg.protocol == PROT_SSH ? "ssh" : 
-		  cfg.protocol == PROT_TELNET ? "telnet" : "raw" );
+        p = "raw";
+        for (i = 0; backends[i].backend != NULL; i++)
+            if (backends[i].protocol == cfg.protocol) {
+                p = backends[i].name;
+                break;
+            }
+        wpps (sesskey, "Protocol", p);
     }
     wppi (sesskey, "CloseOnExit", !!cfg.close_on_exit);
     wppi (sesskey, "WarnOnClose", !!cfg.warn_on_close);
@@ -235,15 +239,14 @@ static void load_settings (char *section, int do_host) {
 
     gpps (sesskey, "HostName", "", cfg.host, sizeof(cfg.host));
     gppi (sesskey, "PortNumber", default_port, &cfg.port);
+
     gpps (sesskey, "Protocol", "default", prot, 10);
-    if (!strcmp(prot, "ssh"))
-	cfg.protocol = PROT_SSH;
-    else if (!strcmp(prot, "telnet"))
-	cfg.protocol = PROT_TELNET;
-    else if (!strcmp(prot, "raw"))
-	cfg.protocol = PROT_RAW;
-    else
-	cfg.protocol = default_protocol;
+    cfg.protocol = default_protocol;
+    for (i = 0; backends[i].backend != NULL; i++)
+        if (!strcmp(prot, backends[i].name)) {
+            cfg.protocol = backends[i].protocol;
+            break;
+        }
 
     gppi (sesskey, "CloseOnExit", 1, &cfg.close_on_exit);
     gppi (sesskey, "WarnOnClose", 1, &cfg.warn_on_close);
@@ -1433,19 +1436,12 @@ void showabout (HWND hwnd) {
     }
 }
 
-void verify_ssh_host_key(char *host, struct RSAKey *key) {
-    char *keystr, *otherstr, *mungedhost;
+void verify_ssh_host_key(char *host, char *keystr) {
+    char *otherstr, *mungedhost;
     int len;
     HKEY rkey;
 
-    /*
-     * Format the key into a string.
-     */
-    len = rsastr_len(key);
-    keystr = malloc(len);
-    if (!keystr)
-	fatalbox("Out of memory");
-    rsastr_fmt(keystr, key);
+    len = 1 + strlen(keystr);
 
     /*
      * Now read a saved key in from the registry and see what it

window.c

@@ -186,9 +186,25 @@ int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
 	}
     }
 
-    back = (cfg.protocol == PROT_SSH ? &ssh_backend : 
-	    cfg.protocol == PROT_TELNET ? &telnet_backend :
-	    &raw_backend);
+    /*
+     * Select protocol. This is farmed out into a table in a
+     * separate file to enable an ssh-free variant.
+     */
+    {
+        int i;
+        back = NULL;
+        for (i = 0; backends[i].backend != NULL; i++)
+            if (backends[i].protocol == cfg.protocol) {
+                back = backends[i].backend;
+                break;
+            }
+        if (back == NULL) {
+            MessageBox(NULL, "Unsupported protocol number found",
+                       "PuTTY Internal Error", MB_OK | MB_ICONEXCLAMATION);
+            WSACleanup();
+            return 1;
+        }
+    }
 
     ldisc = (cfg.ldisc_term ? &ldisc_term : &ldisc_simple);