/*
- Unix SMB/Netbios implementation.
- Version 1.9.
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 "includes.h"
+#include "smb.h"
-#define MAX_VARIABLES 512
+#define MAX_VARIABLES 10000
+
+/* set the expiry on fixed pages */
+#define EXPIRY_TIME (60*60*24*7)
+
+#define CGI_LOGGING 0
+
+#ifdef DEBUG_COMMENTS
+extern void print_title(char *fmt, ...);
+#endif
struct var {
char *name;
static struct var variables[MAX_VARIABLES];
static int num_variables;
+static int content_length;
+static int request_post;
+static int request_get;
+static char *query_string;
+static char *baseurl;
+
+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 int grab_line(int *cl, char *line, int maxsize)
+static char *grab_line(FILE *f, int *cl)
{
+ char *ret;
int i = 0;
+ int len = 1024;
+
+ ret = (char *)malloc(len);
+ if (!ret) return NULL;
+
while ((*cl)) {
- int c = fgetc(stdin);
+ int c = fgetc(f);
(*cl)--;
if (c == EOF) {
break;
}
- if (c == '+') {
- c = ' ';
- }
-
if (c == '\r') continue;
if (strchr("\n&", c)) break;
- if (c == '%' && (*cl) >= 2) {
- int c1, c2;
- c1 = fgetc(stdin);
- c2 = fgetc(stdin);
- (*cl) -= 2;
- if (c1 == EOF || c2 == EOF) break;
- 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 break;
-
- 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 break;
-
- c = (c1<<4) | c2;
- }
-
- line[i++] = c;
+ ret[i++] = c;
- if (i == maxsize) break;
+ if (i == len-1) {
+ char *ret2;
+ ret2 = (char *)realloc(ret, len*2);
+ if (!ret2) return ret;
+ len *= 2;
+ ret = ret2;
+ }
}
-
- /* now unescape the line */
- line[i] = 0;
- return 1;
+ ret[i] = 0;
+ return ret;
}
-
/***************************************************************************
- load all the variables passed to the CGI program
+ load all the variables passed to the CGI program. May have multiple variables
+ 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(void)
+void cgi_load_variables(FILE *f1)
{
- static pstring line;
- char *p;
+ FILE *f = f1;
+ static char *line;
+ char *p, *s, *tok;
int len;
- if (!(p=getenv("CONTENT_LENGTH"))) return;
+#ifdef DEBUG_COMMENTS
+ char dummy[100]="";
+ print_title(dummy);
+ printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
+#endif
- len = atoi(p);
+ if (!f1) {
+ f = stdin;
+ if (!content_length) {
+ p = getenv("CONTENT_LENGTH");
+ len = p?atoi(p):0;
+ } else {
+ len = content_length;
+ }
+ } else {
+ fseek(f, 0, SEEK_END);
+ len = ftell(f);
+ fseek(f, 0, SEEK_SET);
+ }
- if (len <= 0) return;
-
+ if (len > 0 &&
+ (f1 || request_post ||
+ ((s=getenv("REQUEST_METHOD")) &&
+ strcasecmp(s,"POST")==0))) {
+ while (len && (line=grab_line(f, &len))) {
+ p = strchr(line,'=');
+ if (!p) continue;
+
+ *p = 0;
+
+ variables[num_variables].name = strdup(line);
+ variables[num_variables].value = strdup(p+1);
- while (len && grab_line(&len, line, sizeof(line)-1)) {
- p = strchr(line,'=');
- if (!p) continue;
+ free(line);
+
+ if (!variables[num_variables].name ||
+ !variables[num_variables].value)
+ continue;
- *p = 0;
+ unescape(variables[num_variables].value);
+ unescape(variables[num_variables].name);
- variables[num_variables].name = strdup(line);
- variables[num_variables].value = strdup(p+1);
-
- if (!variables[num_variables].name ||
- !variables[num_variables].value)
- continue;
-
-#if 0
- printf("%s=%s<br>\n",
- variables[num_variables].name,
- variables[num_variables].value);
+#ifdef DEBUG_COMMENTS
+ printf("<!== POST var %s has value \"%s\" ==>\n",
+ variables[num_variables].name,
+ variables[num_variables].value);
#endif
+
+ num_variables++;
+ if (num_variables == MAX_VARIABLES) break;
+ }
+ }
- num_variables++;
- if (num_variables == MAX_VARIABLES) break;
+ if (f1) {
+#ifdef DEBUG_COMMENTS
+ printf("<!== End dump in cgi_load_variables() ==>\n");
+#endif
+ return;
}
fclose(stdin);
+
+ if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
+ for (tok=strtok(s,"&;");tok;tok=strtok(NULL,"&;")) {
+ p = strchr(tok,'=');
+ if (!p) continue;
+
+ *p = 0;
+
+ variables[num_variables].name = strdup(tok);
+ variables[num_variables].value = strdup(p+1);
+
+ if (!variables[num_variables].name ||
+ !variables[num_variables].value)
+ continue;
+
+ unescape(variables[num_variables].value);
+ unescape(variables[num_variables].name);
+
+#ifdef DEBUG_COMMENTS
+ printf("<!== Commandline var %s has value \"%s\" ==>\n",
+ variables[num_variables].name,
+ variables[num_variables].value);
+#endif
+ num_variables++;
+ if (num_variables == MAX_VARIABLES) break;
+ }
+
+ }
+#ifdef DEBUG_COMMENTS
+ printf("<!== End dump in cgi_load_variables() ==>\n");
+#endif
}
/***************************************************************************
find a variable passed via CGI
+ Doesn't quite do what you think in the case of POST text variables, because
+ if they exist they might have a value of "" or even " ", depending on the
+ 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)
{
return NULL;
}
+/***************************************************************************
+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.
return strcmp(p, "1") == 0;
}
+
+/***************************************************************************
+like strdup() but quotes < > and &
+ ***************************************************************************/
+char *quotedup(char *s)
+{
+ 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];
+ }
+ }
+
+ *d = 0;
+
+ return ret;
+}
+
+
+/***************************************************************************
+like strdup() but quotes a wide range of characters
+ ***************************************************************************/
+char *urlquote(char *s)
+{
+ 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;
+
+ for (i=0;i<len;i++) {
+ if (strchr(qlist,s[i])) {
+ sprintf(d, "%%%02X", (int)s[i]);
+ d += 3;
+ } else {
+ *d++ = s[i];
+ }
+ }
+
+ *d = 0;
+
+ return ret;
+}
+
+
+/***************************************************************************
+like strdup() but quotes " characters
+ ***************************************************************************/
+char *quotequotes(char *s)
+{
+ 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;
+
+ default:
+ *d++ = s[i];
+ }
+ }
+
+ *d = 0;
+
+ return ret;
+}
+
+
+/***************************************************************************
+quote spaces in a buffer
+ ***************************************************************************/
+void quote_spaces(char *buf)
+{
+ while (*buf) {
+ if (*buf == ' ') *buf = '+';
+ buf++;
+ }
+}
+
+
+
+/***************************************************************************
+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++;
+ }
+}
+
+
+/***************************************************************************
+handle a http authentication line
+ ***************************************************************************/
+static int cgi_handle_authorization(char *line)
+{
+ char *p, *user, *pass;
+
+ if (strncasecmp(line,"Basic ", 6)) {
+ cgi_setup_error("401 Bad Authorization", "",
+ "Only basic authorization is understood");
+ }
+ line += 6;
+ while (line[0] == ' ') line++;
+ base64_decode(line);
+ if (!(p=strchr(line,':'))) {
+ cgi_setup_error("401 Bad Authorization", "",
+ "username/password must be supplied");
+ }
+ *p = 0;
+ user = line;
+ pass = p+1;
+
+ /* currently only allow connections as root */
+ if (strcmp(user,"root")) {
+ cgi_setup_error("401 Bad Authorization", "",
+ "incorrect username/password");
+ }
+
+
+ return password_ok(user, pass, strlen(pass), NULL);
+}
+
+
+/***************************************************************************
+handle a file download
+ ***************************************************************************/
+static void cgi_download(char *file)
+{
+ struct stat st;
+ char buf[1024];
+ int fd, l, i;
+ char *p;
+
+ /* sanitise the filename */
+ for (i=0;file[i];i++) {
+ if (!isalnum(file[i]) && !strchr("/.-_", 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);
+ 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) {
+ printf("Content-Type: image/gif\r\n");
+ } else if (strcmp(p,".jpg")==0) {
+ printf("Content-Type: image/jpeg\r\n");
+ } else {
+ printf("Content-Type: text/html\r\n");
+ }
+ }
+ printf("Expires: %s\r\n", http_timestring(time(NULL)+EXPIRY_TIME));
+
+ 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);
+ }
+ close(fd);
+ exit(0);
+}
+
+
+/***************************************************************************
+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, int auth_required)
+{
+ int authenticated = 0;
+ char line[1024];
+ char *url=NULL;
+ char *p;
+#if CGI_LOGGING
+ FILE *f = fopen("/tmp/cgi.log", "a");
+
+ fprintf(f,"\n[Date: %s]\n", http_timestring(time(NULL)));
+#endif
+
+ if (chdir(rootdir)) {
+ cgi_setup_error("400 Server Error", "",
+ "chdir failed - the server is not configured correctly");
+ }
+
+ if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
+ /* assume we are running under a real web server */
+ return;
+ }
+
+ /* 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 CGI_LOGGING
+ fputs(line, f);
+#endif
+ if (line[0] == '\r' || line[0] == '\n') break;
+ if (strncasecmp(line,"GET ", 4)==0) {
+ request_get = 1;
+ url = strdup(&line[4]);
+ } else if (strncasecmp(line,"POST ", 5)==0) {
+ request_post = 1;
+ url = strdup(&line[5]);
+ } else if (strncasecmp(line,"PUT ", 4)==0) {
+ 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]);
+ }
+ /* ignore all other requests! */
+ }
+#if CGI_LOGGING
+ fclose(f);
+#endif
+
+ if (auth_required && !authenticated) {
+ cgi_setup_error("401 Authorization Required",
+ "WWW-Authenticate: Basic realm=\"root\"\r\n",
+ "You must be authenticated to use this service");
+ }
+
+ if (!url) {
+ cgi_setup_error("400 Bad Request", "",
+ "You must specify a GET or POST request");
+ }
+
+ /* trim the URL */
+ if ((p = strchr(url,' ')) || (p=strchr(url,'\t'))) {
+ *p = 0;
+ }
+ while (*url && strchr("\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,'?'))) {
+ query_string = p+1;
+ *p = 0;
+ }
+
+ if (strstr(url+1,"..")==0 && file_exist(url+1, NULL)) {
+ cgi_download(url+1);
+ }
+
+ printf("HTTP/1.1 200 OK\r\nConnection: close\r\n");
+ printf("Date: %s\r\n", http_timestring(time(NULL)));
+ baseurl = url+1;
+}
+
+
+/***************************************************************************
+return the current pages URL
+ ***************************************************************************/
+char *cgi_baseurl(void)
+{
+ return baseurl;
+}
git.samba.org / samba.git / blobdiff