/*
some simple CGI helper routines
- Copyright (C) Andrew Tridgell 1997
+ Copyright (C) Andrew Tridgell 1997-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <pwd.h>
+#include "includes.h"
+#include "../web/swat_proto.h"
#define MAX_VARIABLES 10000
+/* set the expiry on fixed pages */
+#define EXPIRY_TIME (60*60*24*7)
+
#ifdef DEBUG_COMMENTS
extern void print_title(char *fmt, ...);
#endif
static int num_variables;
static int content_length;
static int request_post;
-static int request_get;
static char *query_string;
-
-static void unescape(char *buf)
-{
- char *p=buf;
-
- while ((p=strchr(p,'+')))
- *p = ' ';
-
- p = buf;
-
- while (p && *p && (p=strchr(p,'%'))) {
- int c1 = p[1];
- int c2 = p[2];
-
- if (c1 >= '0' && c1 <= '9')
- c1 = c1 - '0';
- else if (c1 >= 'A' && c1 <= 'F')
- c1 = 10 + c1 - 'A';
- else if (c1 >= 'a' && c1 <= 'f')
- c1 = 10 + c1 - 'a';
- else {p++; continue;}
-
- if (c2 >= '0' && c2 <= '9')
- c2 = c2 - '0';
- else if (c2 >= 'A' && c2 <= 'F')
- c2 = 10 + c2 - 'A';
- else if (c2 >= 'a' && c2 <= 'f')
- c2 = 10 + c2 - 'a';
- else {p++; continue;}
-
- *p = (c1<<4) | c2;
-
- memcpy(p+1, p+3, strlen(p+3)+1);
- p++;
- }
-}
-
+static const char *baseurl;
+static char *pathinfo;
+static char *C_user;
+static BOOL inetd_server;
+static BOOL got_request;
static char *grab_line(FILE *f, int *cl)
{
- char *ret;
+ char *ret = NULL;
int i = 0;
- int len = 1024;
-
- ret = (char *)malloc(len);
- if (!ret) return NULL;
-
+ int len = 0;
while ((*cl)) {
- int c = fgetc(f);
+ int c;
+
+ if (i == len) {
+ char *ret2;
+ if (len == 0) len = 1024;
+ else len *= 2;
+ ret2 = (char *)Realloc(ret, len);
+ if (!ret2) return ret;
+ ret = ret2;
+ }
+
+ c = fgetc(f);
(*cl)--;
if (c == EOF) {
if (c == '\r') continue;
- if (strchr("\n&", c)) break;
+ if (strchr_m("\n&", c)) break;
ret[i++] = c;
- if (i == len-1) {
- char *ret2;
- ret2 = (char *)realloc(ret, len*2);
- if (!ret2) return ret;
- len *= 2;
- ret = ret2;
- }
}
with the same name and the same or different values. Takes a file parameter
for simulating CGI invocation eg loading saved preferences.
***************************************************************************/
-void cgi_load_variables(FILE *f1)
+void cgi_load_variables(void)
{
- FILE *f = f1;
static char *line;
char *p, *s, *tok;
- int len;
+ int len, i;
+ FILE *f = stdin;
#ifdef DEBUG_COMMENTS
char dummy[100]="";
print_title(dummy);
- printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
+ d_printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
#endif
- if (!f1) {
- f = stdin;
- if (!content_length) {
- p = getenv("CONTENT_LENGTH");
- len = p?atoi(p):0;
- } else {
- len = content_length;
- }
+ if (!content_length) {
+ p = getenv("CONTENT_LENGTH");
+ len = p?atoi(p):0;
} else {
- fseek(f, 0, SEEK_END);
- len = ftell(f);
- fseek(f, 0, SEEK_SET);
+ len = content_length;
}
if (len > 0 &&
- (f1 || request_post ||
+ (request_post ||
((s=getenv("REQUEST_METHOD")) &&
strcasecmp(s,"POST")==0))) {
while (len && (line=grab_line(f, &len))) {
- p = strchr(line,'=');
+ p = strchr_m(line,'=');
if (!p) continue;
*p = 0;
variables[num_variables].name = strdup(line);
variables[num_variables].value = strdup(p+1);
- free(line);
+ SAFE_FREE(line);
if (!variables[num_variables].name ||
!variables[num_variables].value)
continue;
- unescape(variables[num_variables].value);
- unescape(variables[num_variables].name);
+ rfc1738_unescape(variables[num_variables].value);
+ rfc1738_unescape(variables[num_variables].name);
#ifdef DEBUG_COMMENTS
printf("<!== POST var %s has value \"%s\" ==>\n",
}
}
- if (f1) {
-#ifdef DEBUG_COMMENTS
- printf("<!== End dump in cgi_load_variables() ==>\n");
-#endif
- return;
- }
-
fclose(stdin);
+ open("/dev/null", O_RDWR);
if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
for (tok=strtok(s,"&;");tok;tok=strtok(NULL,"&;")) {
- p = strchr(tok,'=');
+ p = strchr_m(tok,'=');
if (!p) continue;
*p = 0;
!variables[num_variables].value)
continue;
- unescape(variables[num_variables].value);
- unescape(variables[num_variables].name);
+ rfc1738_unescape(variables[num_variables].value);
+ rfc1738_unescape(variables[num_variables].name);
#ifdef DEBUG_COMMENTS
printf("<!== Commandline var %s has value \"%s\" ==>\n",
#ifdef DEBUG_COMMENTS
printf("<!== End dump in cgi_load_variables() ==>\n");
#endif
+
+ /* variables from the client are in display charset - convert them
+ to our internal charset before use */
+ for (i=0;i<num_variables;i++) {
+ pstring dest;
+
+ convert_string(CH_DISPLAY, CH_UNIX,
+ variables[i].name, -1,
+ dest, sizeof(dest));
+ free(variables[i].name);
+ variables[i].name = strdup(dest);
+
+ convert_string(CH_DISPLAY, CH_UNIX,
+ variables[i].value, -1,
+ dest, sizeof(dest));
+ free(variables[i].value);
+ variables[i].value = strdup(dest);
+ }
}
browser. Also doesn't allow for variables[] containing multiple variables
with the same name and the same or different values.
***************************************************************************/
-char *cgi_variable(char *name)
+const char *cgi_variable(const char *name)
{
int i;
}
/***************************************************************************
-return a particular cgi variable
- ***************************************************************************/
-char *cgi_vnum(int i, char **name)
-{
- if (i < 0 || i >= num_variables) return NULL;
- *name = variables[i].name;
- return variables[i].value;
-}
-
-/***************************************************************************
- return the value of a CGI boolean variable.
- ***************************************************************************/
-int cgi_boolean(char *name, int def)
-{
- char *p = cgi_variable(name);
-
- if (!p) return def;
-
- return strcmp(p, "1") == 0;
-}
-
-/***************************************************************************
-like strdup() but quotes < > and &
+tell a browser about a fatal error in the http processing
***************************************************************************/
-char *quotedup(char *s)
+static void cgi_setup_error(const char *err, const char *header, const char *info)
{
- int i, n=0;
- int len;
- char *ret;
- char *d;
-
- if (!s) return strdup("");
-
- len = strlen(s);
-
- for (i=0;i<len;i++)
- if (s[i] == '<' || s[i] == '>' || s[i] == '&')
- n++;
-
- ret = malloc(len + n*6 + 1);
-
- if (!ret) return NULL;
-
- d = ret;
-
- for (i=0;i<len;i++) {
- switch (s[i]) {
- case '<':
- strcpy(d, "<");
- d += 4;
- break;
-
- case '>':
- strcpy(d, ">");
- d += 4;
- break;
-
- case '&':
- strcpy(d, "&");
- d += 5;
- break;
-
- default:
- *d++ = s[i];
+ if (!got_request) {
+ /* damn browsers don't like getting cut off before they give a request */
+ char line[1024];
+ while (fgets(line, sizeof(line)-1, stdin)) {
+ if (strncasecmp(line,"GET ", 4)==0 ||
+ strncasecmp(line,"POST ", 5)==0 ||
+ strncasecmp(line,"PUT ", 4)==0) {
+ break;
+ }
}
}
- *d = 0;
-
- return ret;
+ d_printf("HTTP/1.0 %s\r\n%sConnection: close\r\nContent-Type: text/html\r\n\r\n<HTML><HEAD><TITLE>%s</TITLE></HEAD><BODY><H1>%s</H1>%s<p></BODY></HTML>\r\n\r\n", err, header, err, err, info);
+ fclose(stdin);
+ fclose(stdout);
+ exit(0);
}
/***************************************************************************
-like strdup() but quotes a wide range of characters
+tell a browser about a fatal authentication error
***************************************************************************/
-char *urlquote(char *s)
+static void cgi_auth_error(void)
{
- int i, n=0;
- int len;
- char *ret;
- char *d;
- char *qlist = "\"\n\r'&<> \t+;";
-
- if (!s) return strdup("");
-
- len = strlen(s);
-
- for (i=0;i<len;i++)
- if (strchr(qlist, s[i])) n++;
-
- ret = malloc(len + n*2 + 1);
-
- if (!ret) return NULL;
-
- d = ret;
+ if (inetd_server) {
+ cgi_setup_error("401 Authorization Required",
+ "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
+ "You must be authenticated to use this service");
+ } else {
+ printf("Content-Type: text/html\r\n");
- for (i=0;i<len;i++) {
- if (strchr(qlist,s[i])) {
- sprintf(d, "%%%02X", (int)s[i]);
- d += 3;
- } else {
- *d++ = s[i];
- }
+ printf("\r\n<HTML><HEAD><TITLE>SWAT</TITLE></HEAD>\n");
+ printf("<BODY><H1>Installation Error</H1>\n");
+ printf("SWAT must be installed via inetd. It cannot be run as a CGI script<p>\n");
+ printf("</BODY></HTML>\r\n");
}
-
- *d = 0;
-
- return ret;
+ exit(0);
}
-
/***************************************************************************
-like strdup() but quotes " characters
+authenticate when we are running as a CGI
***************************************************************************/
-char *quotequotes(char *s)
+static void cgi_web_auth(void)
{
- int i, n=0;
- int len;
- char *ret;
- char *d;
-
- if (!s) return strdup("");
-
- len = strlen(s);
-
- for (i=0;i<len;i++)
- if (s[i] == '"')
- n++;
-
- ret = malloc(len + n*6 + 1);
-
- if (!ret) return NULL;
-
- d = ret;
-
- for (i=0;i<len;i++) {
- switch (s[i]) {
- case '"':
- strcpy(d, """);
- d += 6;
- break;
+ const char *user = getenv("REMOTE_USER");
+ struct passwd *pwd;
+ const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
+ const char *tail = "</BODY></HTML>\r\n";
- default:
- *d++ = s[i];
- }
+ if (!user) {
+ printf("%sREMOTE_USER not set. Not authenticated by web server.<br>%s\n",
+ head, tail);
+ exit(0);
}
- *d = 0;
-
- return ret;
-}
-
-
-/***************************************************************************
-quote spaces in a buffer
- ***************************************************************************/
-void quote_spaces(char *buf)
-{
- while (*buf) {
- if (*buf == ' ') *buf = '+';
- buf++;
+ pwd = getpwnam_alloc(user);
+ if (!pwd) {
+ printf("%sCannot find user %s<br>%s\n", head, user, tail);
+ exit(0);
}
-}
-
-
-/***************************************************************************
-tell a browser about a fatal error in the http processing
- ***************************************************************************/
-static void cgi_setup_error(char *err, char *header, char *info)
-{
- printf("HTTP/1.1 %s\r\n%sConnection: close\r\nContent-Type: text/html\r\n\r\n<HTML><HEAD><TITLE>%s</TITLE></HEAD><BODY><H1>%s</H1>%s<p></BODY></HTML>\r\n", err, header, err, err, info);
- exit(0);
-}
-
-
-/***************************************************************************
-decode a base64 string in-place - simple and slow algorithm
- ***************************************************************************/
-static void base64_decode(char *s)
-{
- char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- int bit_offset, byte_offset, idx, i;
- unsigned char *d = (unsigned char *)s;
- char *p;
-
- i=0;
-
- while (*s && (p=strchr(b64,*s))) {
- idx = (int)(p - b64);
- byte_offset = (i*6)/8;
- bit_offset = (i*6)%8;
- d[byte_offset] &= ~((1<<(8-bit_offset))-1);
- if (bit_offset < 3) {
- d[byte_offset] |= (idx << (2-bit_offset));
- } else {
- d[byte_offset] |= (idx >> (bit_offset-2));
- d[byte_offset+1] = 0;
- d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
- }
- s++; i++;
+ setuid(0);
+ setuid(pwd->pw_uid);
+ if (geteuid() != pwd->pw_uid || getuid() != pwd->pw_uid) {
+ printf("%sFailed to become user %s - uid=%d/%d<br>%s\n",
+ head, user, (int)geteuid(), (int)getuid(), tail);
+ exit(0);
}
+ passwd_free(&pwd);
}
/***************************************************************************
handle a http authentication line
***************************************************************************/
-static int cgi_handle_authorization(char *line)
+static BOOL cgi_handle_authorization(char *line)
{
- char *p, *user, *pass;
- struct passwd *pwd;
- int ret=0;
+ char *p;
+ fstring user, user_pass;
+ struct passwd *pass = NULL;
if (strncasecmp(line,"Basic ", 6)) {
- cgi_setup_error("401 Bad Authorization", "",
- "Only basic authorization is understood");
+ goto err;
}
line += 6;
while (line[0] == ' ') line++;
- base64_decode(line);
- if (!(p=strchr(line,':'))) {
- cgi_setup_error("401 Bad Authorization", "",
- "username/password must be supplied");
+ base64_decode_inplace(line);
+ if (!(p=strchr_m(line,':'))) {
+ /*
+ * Always give the same error so a cracker
+ * cannot tell why we fail.
+ */
+ goto err;
}
*p = 0;
- user = line;
- pass = p+1;
- /* currently only allow connections as root */
- if (strcasecmp(user,"root")) {
- cgi_setup_error("401 Bad Authorization", "",
- "incorrect username/password");
+ convert_string(CH_DISPLAY, CH_UNIX,
+ line, -1,
+ user, sizeof(user));
+
+ convert_string(CH_DISPLAY, CH_UNIX,
+ p+1, -1,
+ user_pass, sizeof(user_pass));
+
+ /*
+ * Try and get the user from the UNIX password file.
+ */
+
+ pass = getpwnam_alloc(user);
+
+ /*
+ * Validate the password they have given.
+ */
+
+ if NT_STATUS_IS_OK(pass_check(pass, user, user_pass,
+ strlen(user_pass), NULL, False)) {
+
+ if (pass) {
+ /*
+ * Password was ok.
+ */
+
+ become_user_permanently(pass->pw_uid, pass->pw_gid);
+
+ /* Save the users name */
+ C_user = strdup(user);
+ passwd_free(&pass);
+ return True;
+ }
}
- pwd = getpwnam(user);
+err:
+ cgi_setup_error("401 Bad Authorization", "",
+ "username or password incorrect");
- if (!strcmp((char *)crypt(pass, pwd->pw_passwd),pwd->pw_passwd)) {
- ret = 1;
- }
+ passwd_free(&pass);
+ return False;
+}
- memset(pass, 0, strlen(pass));
+/***************************************************************************
+is this root?
+ ***************************************************************************/
+BOOL am_root(void)
+{
+ if (geteuid() == 0) {
+ return( True);
+ } else {
+ return( False);
+ }
+}
- return ret;
+/***************************************************************************
+return a ptr to the users name
+ ***************************************************************************/
+char *cgi_user_name(void)
+{
+ return(C_user);
}
***************************************************************************/
static void cgi_download(char *file)
{
- struct stat st;
+ SMB_STRUCT_STAT st;
char buf[1024];
- int fd, l;
+ int fd, l, i;
char *p;
+ char *lang;
+
+ /* sanitise the filename */
+ for (i=0;file[i];i++) {
+ if (!isalnum((int)file[i]) && !strchr_m("/.-_", file[i])) {
+ cgi_setup_error("404 File Not Found","",
+ "Illegal character in filename");
+ }
+ }
if (!file_exist(file, &st)) {
cgi_setup_error("404 File Not Found","",
"The requested file was not found");
}
- fd = open(file,O_RDONLY);
+
+ fd = web_open(file,O_RDONLY,0);
if (fd == -1) {
cgi_setup_error("404 File Not Found","",
"The requested file was not found");
}
- printf("HTTP/1.1 200 OK\r\n");
- if ((p=strrchr(file,'.'))) {
- if (strcmp(p,".gif")==0 || strcmp(p,".jpg")==0) {
+ printf("HTTP/1.0 200 OK\r\n");
+ if ((p=strrchr_m(file,'.'))) {
+ if (strcmp(p,".gif")==0) {
printf("Content-Type: image/gif\r\n");
+ } else if (strcmp(p,".jpg")==0) {
+ printf("Content-Type: image/jpeg\r\n");
+ } else if (strcmp(p,".txt")==0) {
+ printf("Content-Type: text/plain\r\n");
} else {
printf("Content-Type: text/html\r\n");
}
}
+ printf("Expires: %s\r\n", http_timestring(time(NULL)+EXPIRY_TIME));
+
+ lang = lang_tdb_current();
+ if (lang) {
+ printf("Content-Language: %s\r\n", lang);
+ }
+
printf("Content-Length: %d\r\n\r\n", (int)st.st_size);
while ((l=read(fd,buf,sizeof(buf)))>0) {
fwrite(buf, 1, l, stdout);
}
-/***************************************************************************
-setup the cgi framework, handling the possability that this program is either
-run as a true cgi program by a web browser or is itself a mini web server
- ***************************************************************************/
-void cgi_setup(char *rootdir)
+
+
+/**
+ * @brief Setup the CGI framework.
+ *
+ * Setup the cgi framework, handling the possibility that this program
+ * is either run as a true CGI program with a gateway to a web server, or
+ * is itself a mini web server.
+ **/
+void cgi_setup(const char *rootdir, int auth_required)
{
- int authenticated = 0;
+ BOOL authenticated = False;
char line[1024];
char *url=NULL;
char *p;
+ char *lang;
if (chdir(rootdir)) {
cgi_setup_error("400 Server Error", "",
"chdir failed - the server is not configured correctly");
}
+ /* Handle the possability we might be running as non-root */
+ sec_init();
+
+ if ((lang=getenv("HTTP_ACCEPT_LANGUAGE"))) {
+ /* if running as a cgi program */
+ web_set_lang(lang);
+ }
+
+ /* maybe we are running under a web server */
if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
- /* assume we are running under a real web server */
+ if (auth_required) {
+ cgi_web_auth();
+ }
return;
}
+ inetd_server = True;
+
+ if (!check_access(1, lp_hostsallow(-1), lp_hostsdeny(-1))) {
+ cgi_setup_error("400 Server Error", "",
+ "Samba is configured to deny access from this client\n<br>Check your \"hosts allow\" and \"hosts deny\" options in smb.conf ");
+ }
+
/* we are a mini-web server. We need to read the request from stdin
and handle authentication etc */
while (fgets(line, sizeof(line)-1, stdin)) {
if (line[0] == '\r' || line[0] == '\n') break;
if (strncasecmp(line,"GET ", 4)==0) {
- request_get = 1;
+ got_request = True;
url = strdup(&line[4]);
} else if (strncasecmp(line,"POST ", 5)==0) {
+ got_request = True;
request_post = 1;
url = strdup(&line[5]);
} else if (strncasecmp(line,"PUT ", 4)==0) {
+ got_request = True;
cgi_setup_error("400 Bad Request", "",
"This server does not accept PUT requests");
} else if (strncasecmp(line,"Authorization: ", 15)==0) {
authenticated = cgi_handle_authorization(&line[15]);
} else if (strncasecmp(line,"Content-Length: ", 16)==0) {
content_length = atoi(&line[16]);
+ } else if (strncasecmp(line,"Accept-Language: ", 17)==0) {
+ web_set_lang(&line[17]);
}
/* ignore all other requests! */
}
- if (!authenticated) {
- cgi_setup_error("401 Authorization Required",
- "WWW-Authenticate: Basic realm=\"samba\"\r\n",
- "You must be authenticated to use this service");
+ if (auth_required && !authenticated) {
+ cgi_auth_error();
}
if (!url) {
}
/* trim the URL */
- if ((p = strchr(url,' ')) || (p=strchr(url,'\t'))) {
+ if ((p = strchr_m(url,' ')) || (p=strchr_m(url,'\t'))) {
*p = 0;
}
- while (*url && strchr("\r\n",url[strlen(url)-1])) {
+ while (*url && strchr_m("\r\n",url[strlen(url)-1])) {
url[strlen(url)-1] = 0;
}
/* anything following a ? in the URL is part of the query string */
- if ((p=strchr(url,'?'))) {
+ if ((p=strchr_m(url,'?'))) {
query_string = p+1;
*p = 0;
}
- if (strcmp(url,"/")) {
- cgi_download(url+1);
+ string_sub(url, "/swat/", "", 0);
+
+ if (url[0] != '/' && strstr(url,"..")==0 && file_exist(url, NULL)) {
+ cgi_download(url);
}
- printf("HTTP/1.1 200 OK\r\nConnection: close\r\nContent-Type: text/html\r\n\r\n");
-
+ printf("HTTP/1.0 200 OK\r\nConnection: close\r\n");
+ printf("Date: %s\r\n", http_timestring(time(NULL)));
+ baseurl = "";
+ pathinfo = url+1;
+}
+
+
+/***************************************************************************
+return the current pages URL
+ ***************************************************************************/
+const char *cgi_baseurl(void)
+{
+ if (inetd_server) {
+ return baseurl;
+ }
+ return getenv("SCRIPT_NAME");
+}
+
+/***************************************************************************
+return the current pages path info
+ ***************************************************************************/
+const char *cgi_pathinfo(void)
+{
+ char *r;
+ if (inetd_server) {
+ return pathinfo;
+ }
+ r = getenv("PATH_INFO");
+ if (!r) return "";
+ if (*r == '/') r++;
+ return r;
+}
+
+/***************************************************************************
+return the hostname of the client
+ ***************************************************************************/
+char *cgi_remote_host(void)
+{
+ if (inetd_server) {
+ return get_socket_name(1,False);
+ }
+ return getenv("REMOTE_HOST");
+}
+
+/***************************************************************************
+return the hostname of the client
+ ***************************************************************************/
+char *cgi_remote_addr(void)
+{
+ if (inetd_server) {
+ return get_socket_addr(1);
+ }
+ return getenv("REMOTE_ADDR");
+}
+
+
+/***************************************************************************
+return True if the request was a POST
+ ***************************************************************************/
+BOOL cgi_waspost(void)
+{
+ if (inetd_server) {
+ return request_post;
+ }
+ return strequal(getenv("REQUEST_METHOD"), "POST");
}
git.samba.org / ira / wip.git / blobdiff