allow multiple whitespace but only one '=' between tokens, bug report from

Ralf S. Engelschall <rse@engelschall.com> but different fix. okay deraadt@

4 files changed, 86 insertions, 54 deletions

diff --git a/usr.bin/ssh/aux.c b/usr.bin/ssh/aux.c
index 63f7dd41aa5..709e2451bba 100644
--- a/usr.bin/ssh/aux.c
+++ b/usr.bin/ssh/aux.c
@@ -1,5 +1,5 @@
 #include "includes.h"
-RCSID("$OpenBSD: aux.c,v 1.3 2000/06/18 17:13:41 markus Exp $");
+RCSID("$OpenBSD: aux.c,v 1.4 2000/07/13 22:53:21 provos Exp $");
 
 #include "ssh.h"
 
@@ -39,3 +39,33 @@ set_nonblock(int fd)
 	if (fcntl(fd, F_SETFL, val) == -1)
 		error("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd, strerror(errno));
 }
+
+/* Characters considered whitespace in strsep calls. */
+#define WHITESPACE " \t\r\n"
+
+char *
+strdelim(char **s)
+{
+	char *old;
+	int wspace = 0;
+
+	if (*s == NULL)
+		return NULL;
+
+	old = *s;
+
+	*s = strpbrk(*s, WHITESPACE "=");
+	if (*s == NULL)
+		return (old);
+
+	/* Allow only one '=' to be skipped */
+	if (*s[0] == '=')
+		wspace = 1;
+	*s[0] = '\0';
+
+	*s += strspn(*s + 1, WHITESPACE) + 1;
+	if (*s[0] == '=' && !wspace)
+		*s += strspn(*s + 1, WHITESPACE) + 1;
+
+	return (old);
+}
diff --git a/usr.bin/ssh/readconf.c b/usr.bin/ssh/readconf.c
index c514e9b5915..4dfaff489ec 100644
--- a/usr.bin/ssh/readconf.c
+++ b/usr.bin/ssh/readconf.c
@@ -14,7 +14,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: readconf.c,v 1.41 2000/07/11 19:17:44 deraadt Exp $");
+RCSID("$OpenBSD: readconf.c,v 1.42 2000/07/13 22:53:21 provos Exp $");
 
 #include "ssh.h"
 #include "cipher.h"
@@ -164,10 +164,6 @@ static struct {
 	{ NULL, 0 }
 };
 
-/* Characters considered whitespace in strsep calls. */
-#define WHITESPACE " \t\r\n="
-
-
 /*
  * Adds a local TCP/IP port forward to options.  Never returns if there is an
  * error.
@@ -241,13 +237,15 @@ process_config_line(Options *options, const char *host,
 	int opcode, *intptr, value;
 	u_short fwd_port, fwd_host_port;
 
-	/* Skip leading whitespace. */
-	s = line + strspn(line, WHITESPACE);
-	if (!*s || *s == '\n' || *s == '#')
+	s = line;
+	/* Get the keyword. (Each line is supposed to begin with a keyword). */
+	keyword = strdelim(&s);
+	/* Ignore leading whitespace. */
+	if (*keyword == '\0')
+		keyword = s;
+	if (!*keyword || *keyword == '\n' || *keyword == '#')
 		return 0;
 
-	/* Get the keyword. (Each line is supposed to begin with a keyword). */
-	keyword = strsep(&s, WHITESPACE);
 	opcode = parse_token(keyword, filename, linenum);
 
 	switch (opcode) {
@@ -258,7 +256,7 @@ process_config_line(Options *options, const char *host,
 	case oForwardAgent:
 		intptr = &options->forward_agent;
 parse_flag:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
 		value = 0;	/* To avoid compiler warning... */
@@ -344,7 +342,7 @@ parse_flag:
 
 	case oStrictHostKeyChecking:
 		intptr = &options->strict_host_key_checking;
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing yes/no argument.",
 			      filename, linenum);
@@ -379,7 +377,7 @@ parse_flag:
 
 	case oIdentityFile:
 	case oIdentityFile2:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (*activep) {
@@ -404,7 +402,7 @@ parse_flag:
 	case oUser:
 		charptr = &options->user;
 parse_string:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (*activep && *charptr == NULL)
@@ -434,7 +432,7 @@ parse_string:
 	case oProxyCommand:
 		charptr = &options->proxy_command;
 		string = xstrdup("");
-		while ((arg = strsep(&s, WHITESPACE)) != NULL && *arg != '\0') {
+		while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
 			string = xrealloc(string, strlen(string) + strlen(arg) + 2);
 			strcat(string, " ");
 			strcat(string, arg);
@@ -448,7 +446,7 @@ parse_string:
 	case oPort:
 		intptr = &options->port;
 parse_int:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (arg[0] < '0' || arg[0] > '9')
@@ -468,7 +466,7 @@ parse_int:
 
 	case oCipher:
 		intptr = &options->cipher;
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		value = cipher_number(arg);
@@ -480,7 +478,7 @@ parse_int:
 		break;
 
 	case oCiphers:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (!ciphers_valid(arg))
@@ -492,7 +490,7 @@ parse_int:
 
 	case oProtocol:
 		intptr = &options->protocol;
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		value = proto_spec(arg);
@@ -505,7 +503,7 @@ parse_int:
 
 	case oLogLevel:
 		intptr = (int *) &options->log_level;
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		value = log_level_number(arg);
 		if (value == (LogLevel) - 1)
 			fatal("%.200s line %d: unsupported log level '%s'\n",
@@ -515,14 +513,14 @@ parse_int:
 		break;
 
 	case oRemoteForward:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (arg[0] < '0' || arg[0] > '9')
 			fatal("%.200s line %d: Badly formatted port number.",
 			      filename, linenum);
 		fwd_port = atoi(arg);
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing second argument.",
 			      filename, linenum);
@@ -534,14 +532,14 @@ parse_int:
 		break;
 
 	case oLocalForward:
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (arg[0] < '0' || arg[0] > '9')
 			fatal("%.200s line %d: Badly formatted port number.",
 			      filename, linenum);
 		fwd_port = atoi(arg);
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing second argument.",
 			      filename, linenum);
@@ -554,18 +552,18 @@ parse_int:
 
 	case oHost:
 		*activep = 0;
-		while ((arg = strsep(&s, WHITESPACE)) != NULL && *arg != '\0')
+		while ((arg = strdelim(&s)) != NULL && *arg != '\0')
 			if (match_pattern(host, arg)) {
 				debug("Applying options for %.100s", arg);
 				*activep = 1;
 				break;
 			}
-		/* Avoid garbage check below, as strsep is done. */
+		/* Avoid garbage check below, as strdelim is done. */
 		return 0;
 
 	case oEscapeChar:
 		intptr = &options->escape_char;
-		arg = strsep(&s, WHITESPACE);
+		arg = strdelim(&s);
 		if (!arg || *arg == '\0')
 			fatal("%.200s line %d: Missing argument.", filename, linenum);
 		if (arg[0] == '^' && arg[2] == 0 &&
@@ -590,7 +588,7 @@ parse_int:
 	}
 
 	/* Check that there is no garbage at end of line. */
-	if ((arg = strsep(&s, WHITESPACE)) != NULL && *arg != '\0')
+	if ((arg = strdelim(&s)) != NULL && *arg != '\0')
 	{
 		fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
 		      filename, linenum, arg);
diff --git a/usr.bin/ssh/servconf.c b/usr.bin/ssh/servconf.c
index 77ac8452749..9e85533cde2 100644
--- a/usr.bin/ssh/servconf.c
+++ b/usr.bin/ssh/servconf.c
@@ -12,7 +12,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: servconf.c,v 1.47 2000/07/10 16:30:25 ho Exp $");
+RCSID("$OpenBSD: servconf.c,v 1.48 2000/07/13 22:53:21 provos Exp $");
 
 #include "ssh.h"
 #include "servconf.h"
@@ -164,8 +164,6 @@ fill_default_server_options(ServerOptions *options)
 		options->max_startups = 10;
 }
 
-#define WHITESPACE " \t\r\n="
-
 /* Keyword tokens. */
 typedef enum {
 	sBadOption,		/* == unknown option */
@@ -318,10 +316,13 @@ read_server_config(ServerOptions *options, const char *filename)
 	linenum = 0;
 	while (fgets(line, sizeof(line), f)) {
 		linenum++;
-		cp = line + strspn(line, WHITESPACE);
-		if (!*cp || *cp == '#')
+		cp = line;
+		arg = strdelim(&cp);
+		/* Ignore leading whitespace */
+		if (*arg == '\0')
+			arg = cp;
+		if (!*arg || *arg == '#')
 			continue;
-		arg = strsep(&cp, WHITESPACE);
 		opcode = parse_token(arg, filename, linenum);
 		switch (opcode) {
 		case sBadOption:
@@ -337,7 +338,7 @@ read_server_config(ServerOptions *options, const char *filename)
 			if (options->num_ports >= MAX_PORTS)
 				fatal("%s line %d: too many ports.\n",
 				    filename, linenum);
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: missing port number.\n",
 				    filename, linenum);
@@ -347,7 +348,7 @@ read_server_config(ServerOptions *options, const char *filename)
 		case sServerKeyBits:
 			intptr = &options->server_key_bits;
 parse_int:
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0') {
 				fprintf(stderr, "%s line %d: missing integer value.\n",
 					filename, linenum);
@@ -367,7 +368,7 @@ parse_int:
 			goto parse_int;
 
 		case sListenAddress:
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: missing inet addr.\n",
 				    filename, linenum);
@@ -379,7 +380,7 @@ parse_int:
 			charptr = (opcode == sHostKeyFile ) ?
 			    &options->host_key_file : &options->host_dsa_key_file;
 parse_filename:
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0') {
 				fprintf(stderr, "%s line %d: missing file name.\n",
 				    filename, linenum);
@@ -396,12 +397,12 @@ parse_filename:
 		case sRandomSeedFile:
 			fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n",
 				filename, linenum);
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			break;
 
 		case sPermitRootLogin:
 			intptr = &options->permit_root_login;
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0') {
 				fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n",
 					filename, linenum);
@@ -425,7 +426,7 @@ parse_filename:
 		case sIgnoreRhosts:
 			intptr = &options->ignore_rhosts;
 parse_flag:
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0') {
 				fprintf(stderr, "%s line %d: missing yes/no argument.\n",
 					filename, linenum);
@@ -540,7 +541,7 @@ parse_flag:
 
 		case sLogFacility:
 			intptr = (int *) &options->log_facility;
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			value = log_facility_number(arg);
 			if (value == (SyslogFacility) - 1)
 				fatal("%.200s line %d: unsupported log facility '%s'\n",
@@ -551,7 +552,7 @@ parse_flag:
 
 		case sLogLevel:
 			intptr = (int *) &options->log_level;
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			value = log_level_number(arg);
 			if (value == (LogLevel) - 1)
 				fatal("%.200s line %d: unsupported log level '%s'\n",
@@ -561,7 +562,7 @@ parse_flag:
 			break;
 
 		case sAllowUsers:
-			while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+			while ((arg = strdelim(&cp)) && *arg != '\0') {
 				if (options->num_allow_users >= MAX_ALLOW_USERS)
 					fatal("%s line %d: too many allow users.\n",
 					    filename, linenum);
@@ -570,7 +571,7 @@ parse_flag:
 			break;
 
 		case sDenyUsers:
-			while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+			while ((arg = strdelim(&cp)) && *arg != '\0') {
 				if (options->num_deny_users >= MAX_DENY_USERS)
 					fatal( "%s line %d: too many deny users.\n",
 					    filename, linenum);
@@ -579,7 +580,7 @@ parse_flag:
 			break;
 
 		case sAllowGroups:
-			while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+			while ((arg = strdelim(&cp)) && *arg != '\0') {
 				if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
 					fatal("%s line %d: too many allow groups.\n",
 					    filename, linenum);
@@ -588,7 +589,7 @@ parse_flag:
 			break;
 
 		case sDenyGroups:
-			while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+			while ((arg = strdelim(&cp)) && *arg != '\0') {
 				if (options->num_deny_groups >= MAX_DENY_GROUPS)
 					fatal("%s line %d: too many deny groups.\n",
 					    filename, linenum);
@@ -597,7 +598,7 @@ parse_flag:
 			break;
 
 		case sCiphers:
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: Missing argument.", filename, linenum);
 			if (!ciphers_valid(arg))
@@ -609,7 +610,7 @@ parse_flag:
 
 		case sProtocol:
 			intptr = &options->protocol;
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: Missing argument.", filename, linenum);
 			value = proto_spec(arg);
@@ -625,7 +626,7 @@ parse_flag:
 				fatal("%s line %d: too many subsystems defined.",
 				      filename, linenum);
 			}
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: Missing subsystem name.",
 				      filename, linenum);
@@ -634,7 +635,7 @@ parse_flag:
 					fatal("%s line %d: Subsystem '%s' already defined.",
 					      filename, linenum, arg);
 			options->subsystem_name[options->num_subsystems] = xstrdup(arg);
-			arg = strsep(&cp, WHITESPACE);
+			arg = strdelim(&cp);
 			if (!arg || *arg == '\0')
 				fatal("%s line %d: Missing subsystem command.",
 				      filename, linenum);
@@ -651,7 +652,7 @@ parse_flag:
 				filename, linenum, arg, opcode);
 			exit(1);
 		}
-		if ((arg = strsep(&cp, WHITESPACE)) != NULL && *arg != '\0') {
+		if ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
 			fprintf(stderr, 
 				"%s line %d: garbage at end of line; \"%.200s\".\n",
 				filename, linenum, arg);
diff --git a/usr.bin/ssh/ssh.h b/usr.bin/ssh/ssh.h
index 51d4ffffb10..94e75e98191 100644
--- a/usr.bin/ssh/ssh.h
+++ b/usr.bin/ssh/ssh.h
@@ -13,7 +13,7 @@
  *
  */
 
-/* RCSID("$OpenBSD: ssh.h,v 1.47 2000/06/20 01:39:45 markus Exp $"); */
+/* RCSID("$OpenBSD: ssh.h,v 1.48 2000/07/13 22:53:21 provos Exp $"); */
 
 #ifndef SSH_H
 #define SSH_H
@@ -450,6 +450,9 @@ char   *tilde_expand_filename(const char *filename, uid_t my_uid);
 /* remove newline at end of string */
 char	*chop(char *s);
 
+/* return next token in configuration line */
+char	*strdelim(char **s);
+
 /* set filedescriptor to non-blocking */
 void	set_nonblock(int fd);