/*
- * "$Id: var.c 6649 2007-07-11 21:46:42Z mike $"
+ * "$Id$"
*
- * CGI form variable and array functions.
+ * CGI form variable and array functions for CUPS.
*
- * Copyright 2007-2008 by Apple Inc.
+ * Copyright 2007-2011 by Apple Inc.
* Copyright 1997-2005 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
*
* Contents:
*
- * cgiCheckVariables() - Check for the presence of "required" variables.
- * cgiGetArray() - Get an element from a form array...
- * cgiGetFile() - Get the file (if any) that was submitted in the form.
+ * cgiCheckVariables() - Check for the presence of "required"
+ * variables.
+ * cgiClearVariables() - Clear all form variables.
+ * cgiGetArray() - Get an element from a form array.
+ * cgiGetCookie() - Get a cookie value.
+ * cgiGetFile() - Get the file (if any) that was submitted in
+ * the form.
* cgiGetSize() - Get the size of a form array value.
- * cgiGetVariable() - Get a CGI variable from the database...
- * cgiInitialize() - Initialize the CGI variable "database"...
+ * cgiGetVariable() - Get a CGI variable from the database.
+ * cgiInitialize() - Initialize the CGI variable "database".
* cgiIsPOST() - Determine whether this page was POSTed.
* cgiSetArray() - Set array element N to the specified string.
+ * cgiSetCookie() - Set a cookie value.
* cgiSetSize() - Set the array size.
- * cgiSetVariable() - Set a CGI variable in the database...
+ * cgiSetVariable() - Set a CGI variable in the database.
* cgi_add_variable() - Add a form variable.
* cgi_compare_variables() - Compare two variables.
- * cgi_find_variable() - Find a variable...
- * cgi_initialize_get() - Initialize form variables using the GET method.
- * cgi_initialize_multipart() - Initialize variables and file using the POST method.
+ * cgi_find_variable() - Find a variable.
+ * cgi_initialize_cookies() - Initialize cookies.
+ * cgi_initialize_get() - Initialize form variables using the GET
+ * method.
+ * cgi_initialize_multipart() - Initialize variables and file using the POST
+ * method.
* cgi_initialize_post() - Initialize variables using the POST method.
* cgi_initialize_string() - Initialize form variables from a string.
- * cgi_passwd() - Catch authentication requests and notify the server.
+ * cgi_passwd() - Catch authentication requests and notify the
+ * server.
+ * cgi_set_sid() - Set the CUPS session ID.
* cgi_sort_variables() - Sort all form variables for faster lookup.
* cgi_unlink_file() - Remove the uploaded form.
*/
/*#define DEBUG*/
#include "cgi-private.h"
-#include <errno.h>
+#include <cups/http.h>
+#include <cups/md5-private.h>
+
+
+/*
+ * Session ID name
+ */
+
+#define CUPS_SID "org.cups.sid"
/*
* Local globals...
*/
+static int num_cookies = 0;/* Number of cookies */
+static cups_option_t *cookies = NULL;/* Cookies */
static int form_count = 0, /* Form variable count */
form_alloc = 0; /* Number of variables allocated */
static _cgi_var_t *form_vars = NULL;
static int cgi_compare_variables(const _cgi_var_t *v1,
const _cgi_var_t *v2);
static _cgi_var_t *cgi_find_variable(const char *name);
+static void cgi_initialize_cookies(void);
static int cgi_initialize_get(void);
static int cgi_initialize_multipart(const char *boundary);
static int cgi_initialize_post(void);
static int cgi_initialize_string(const char *data);
static const char *cgi_passwd(const char *prompt);
+static const char *cgi_set_sid(void);
static void cgi_sort_variables(void);
static void cgi_unlink_file(void);
/*
- * 'cgiGetArray()' - Get an element from a form array...
+ * 'cgiClearVariables()' - Clear all form variables.
+ */
+
+void
+cgiClearVariables(void)
+{
+ int i, j; /* Looping vars */
+ _cgi_var_t *v; /* Current variable */
+
+
+ fputs("DEBUG: cgiClearVariables called.\n", stderr);
+
+ for (v = form_vars, i = form_count; i > 0; v ++, i --)
+ {
+ _cupsStrFree(v->name);
+ for (j = 0; j < v->nvalues; j ++)
+ if (v->values[j])
+ _cupsStrFree(v->values[j]);
+ }
+
+ form_count = 0;
+
+ cgi_unlink_file();
+}
+
+
+/*
+ * 'cgiGetArray()' - Get an element from a form array.
*/
const char * /* O - Element value or NULL */
if ((var = cgi_find_variable(name)) == NULL)
return (NULL);
- if (var->nvalues == 1)
- return (var->values[0]);
-
if (element < 0 || element >= var->nvalues)
return (NULL);
- return (var->values[element]);
+ return (_cupsStrRetain(var->values[element]));
+}
+
+
+/*
+ * 'cgiGetCookie()' - Get a cookie value.
+ */
+
+const char * /* O - Value or NULL */
+cgiGetCookie(const char *name) /* I - Name of cookie */
+{
+ return (cupsGetOption(name, num_cookies, cookies));
}
/*
- * 'cgiGetVariable()' - Get a CGI variable from the database...
+ * 'cgiGetVariable()' - Get a CGI variable from the database.
*
* Returns NULL if the variable doesn't exist. If the variable is an
- * array of values, returns the last element...
+ * array of values, returns the last element.
*/
const char * /* O - Value of variable */
var->values[var->nvalues - 1]));
#endif /* DEBUG */
- return ((var == NULL) ? NULL : var->values[var->nvalues - 1]);
+ return ((var == NULL) ? NULL : _cupsStrRetain(var->values[var->nvalues - 1]));
}
/*
- * 'cgiInitialize()' - Initialize the CGI variable "database"...
+ * 'cgiInitialize()' - Initialize the CGI variable "database".
*/
int /* O - Non-zero if there was form data */
cgiInitialize(void)
{
- const char *method; /* Form posting method */
- const char *content_type; /* Content-Type of post data */
+ const char *method, /* Form posting method */
+ *content_type, /* Content-Type of post data */
+ *cups_sid_cookie, /* SID cookie */
+ *cups_sid_form; /* SID form variable */
/*
setbuf(stdout, NULL);
#endif /* DEBUG */
+ /*
+ * Get cookies...
+ */
+
+ cgi_initialize_cookies();
+
+ if ((cups_sid_cookie = cgiGetCookie(CUPS_SID)) == NULL)
+ {
+ fputs("DEBUG: " CUPS_SID " cookie not found, initializing!\n", stderr);
+ cups_sid_cookie = cgi_set_sid();
+ }
+
+ fprintf(stderr, "DEBUG: " CUPS_SID " cookie is \"%s\"\n", cups_sid_cookie);
+
/*
* Get the request method (GET or POST)...
*/
* Grab form data from the corresponding location...
*/
- if (!strcasecmp(method, "GET"))
+ if (!_cups_strcasecmp(method, "GET"))
return (cgi_initialize_get());
- else if (!strcasecmp(method, "POST") && content_type)
+ else if (!_cups_strcasecmp(method, "POST") && content_type)
{
const char *boundary = strstr(content_type, "boundary=");
boundary += 9;
if (content_type && !strncmp(content_type, "multipart/form-data; ", 21))
- return (cgi_initialize_multipart(boundary));
+ {
+ if (!cgi_initialize_multipart(boundary))
+ return (0);
+ }
+ else if (!cgi_initialize_post())
+ return (0);
+
+ if ((cups_sid_form = cgiGetVariable(CUPS_SID)) == NULL ||
+ strcmp(cups_sid_cookie, cups_sid_form))
+ {
+ if (cups_sid_form)
+ fprintf(stderr, "DEBUG: " CUPS_SID " form variable is \"%s\"\n",
+ cups_sid_form);
+ else
+ fputs("DEBUG: " CUPS_SID " form variable is not present.\n", stderr);
+
+ cgiClearVariables();
+ return (0);
+ }
else
- return (cgi_initialize_post());
+ return (1);
}
else
return (0);
if (name == NULL || value == NULL || element < 0 || element > 100000)
return;
+ fprintf(stderr, "DEBUG: cgiSetArray: %s[%d]=\"%s\"\n", name, element, value);
+
if ((var = cgi_find_variable(name)) == NULL)
{
cgi_add_variable(name, element, value);
var->nvalues = element + 1;
}
else if (var->values[element])
- free((char *)var->values[element]);
+ _cupsStrFree((char *)var->values[element]);
- var->values[element] = strdup(value);
+ var->values[element] = _cupsStrAlloc(value);
}
}
+/*
+ * 'cgiSetCookie()' - Set a cookie value.
+ */
+
+void
+cgiSetCookie(const char *name, /* I - Name */
+ const char *value, /* I - Value */
+ const char *path, /* I - Path (typically "/") */
+ const char *domain, /* I - Domain name */
+ time_t expires, /* I - Expiration date (0 for session) */
+ int secure) /* I - Require SSL */
+{
+ num_cookies = cupsAddOption(name, value, num_cookies, &cookies);
+
+ printf("Set-Cookie: %s=%s;", name, value);
+ if (path)
+ printf(" path=%s;", path);
+ if (domain)
+ printf(" domain=%s;", domain);
+ if (expires)
+ {
+ char date[256]; /* Date string */
+
+ printf(" expires=%s;", httpGetDateString2(expires, date, sizeof(date)));
+ }
+ if (secure)
+ puts(" secure;");
+ else
+ putchar('\n');
+}
+
+
/*
* 'cgiSetSize()' - Set the array size.
*/
{
for (i = size; i < var->nvalues; i ++)
if (var->values[i])
- free((void *)(var->values[i]));
+ _cupsStrFree((void *)(var->values[i]));
}
var->nvalues = size;
/*
- * 'cgiSetVariable()' - Set a CGI variable in the database...
+ * 'cgiSetVariable()' - Set a CGI variable in the database.
*
* If the variable is an array, this truncates the array to a single element.
*/
if (name == NULL || value == NULL)
return;
+ fprintf(stderr, "cgiSetVariable: %s=\"%s\"\n", name, value);
+
if ((var = cgi_find_variable(name)) == NULL)
{
cgi_add_variable(name, 0, value);
{
for (i = 0; i < var->nvalues; i ++)
if (var->values[i])
- free((char *)var->values[i]);
+ _cupsStrFree((char *)var->values[i]);
- var->values[0] = strdup(value);
+ var->values[0] = _cupsStrAlloc(value);
var->nvalues = 1;
}
}
if ((var->values = calloc(element + 1, sizeof(char *))) == NULL)
return;
- var->name = strdup(name);
+ var->name = _cupsStrAlloc(name);
var->nvalues = element + 1;
var->avalues = element + 1;
- var->values[element] = strdup(value);
+ var->values[element] = _cupsStrAlloc(value);
form_count ++;
}
const _cgi_var_t *v1, /* I - First variable */
const _cgi_var_t *v2) /* I - Second variable */
{
- return (strcasecmp(v1->name, v2->name));
+ return (_cups_strcasecmp(v1->name, v2->name));
}
/*
- * 'cgi_find_variable()' - Find a variable...
+ * 'cgi_find_variable()' - Find a variable.
*/
static _cgi_var_t * /* O - Variable pointer or NULL */
}
+/*
+ * 'cgi_initialize_cookies()' - Initialize cookies.
+ */
+
+static void
+cgi_initialize_cookies(void)
+{
+ const char *cookie; /* HTTP_COOKIE environment variable */
+ char name[128], /* Name string */
+ value[512], /* Value string */
+ *ptr; /* Pointer into name/value */
+
+
+ if ((cookie = getenv("HTTP_COOKIE")) == NULL)
+ return;
+
+ while (*cookie)
+ {
+ /*
+ * Skip leading whitespace...
+ */
+
+ while (isspace(*cookie & 255))
+ cookie ++;
+ if (!*cookie)
+ break;
+
+ /*
+ * Copy the name...
+ */
+
+ for (ptr = name; *cookie && *cookie != '=';)
+ if (ptr < (name + sizeof(name) - 1))
+ *ptr++ = *cookie++;
+ else
+ break;
+
+ if (*cookie != '=')
+ break;
+
+ *ptr = '\0';
+ cookie ++;
+
+ /*
+ * Then the value...
+ */
+
+ if (*cookie == '\"')
+ {
+ for (cookie ++, ptr = value; *cookie && *cookie != '\"';)
+ if (ptr < (value + sizeof(value) - 1))
+ *ptr++ = *cookie++;
+ else
+ break;
+
+ if (*cookie == '\"')
+ cookie ++;
+ }
+ else
+ {
+ for (ptr = value; *cookie && *cookie != ';';)
+ if (ptr < (value + sizeof(value) - 1))
+ *ptr++ = *cookie++;
+ else
+ break;
+ }
+
+ if (*cookie == ';')
+ cookie ++;
+ else if (*cookie)
+ break;
+
+ *ptr = '\0';
+
+ /*
+ * Then add the cookie to an array as long as the name doesn't start with
+ * "$"...
+ */
+
+ if (name[0] != '$')
+ num_cookies = cupsAddOption(name, value, num_cookies, &cookies);
+ }
+}
+
+
/*
* 'cgi_initialize_get()' - Initialize form variables using the GET method.
*/
/*
- * 'cgi_initialize_multipart()' - Initialize variables and file using the POST method.
+ * 'cgi_initialize_multipart()' - Initialize variables and file using the POST
+ * method.
*
* TODO: Update to support files > 2GB.
*/
/*
* Copy file data to the temp file...
*/
-
+
ptr = line;
while ((ch = getchar()) != EOF)
filename[0] = '\0';
mimetype[0] = '\0';
}
- else if (!strncasecmp(line, "Content-Disposition:", 20))
+ else if (!_cups_strncasecmp(line, "Content-Disposition:", 20))
{
if ((ptr = strstr(line + 20, " name=\"")) != NULL)
{
*ptr = '\0';
}
}
- else if (!strncasecmp(line, "Content-Type:", 13))
+ else if (!_cups_strncasecmp(line, "Content-Type:", 13))
{
for (ptr = line + 13; isspace(*ptr & 255); ptr ++);
else
nbytes = 0;
}
+ else if (nbytes == 0)
+ {
+ /*
+ * CUPS STR #3176: OpenBSD: Early end-of-file on POST data causes 100% CPU
+ *
+ * This should never happen, but does on OpenBSD. If we see early end-of-
+ * file, treat this as an error and process no data.
+ */
+
+ free(data);
+ return (0);
+ }
data[length] = '\0';
char *s, /* Pointer to current form string */
ch, /* Temporary character */
name[255], /* Name of form variable */
- value[65536]; /* Variable value... */
+ value[65536]; /* Variable value */
/*
* Read the hex code...
*/
+ if (!isxdigit(data[1] & 255) || !isxdigit(data[2] & 255))
+ return (0);
+
if (s < (value + sizeof(value) - 1))
{
data ++;
if (s > value)
s --;
- while (s >= value && *s == ' ')
+ while (s >= value && isspace(*s & 255))
*s-- = '\0';
/*
}
+/*
+ * 'cgi_set_sid()' - Set the CUPS session ID.
+ */
+
+static const char * /* O - New session ID */
+cgi_set_sid(void)
+{
+ char buffer[512], /* SID data */
+ sid[33]; /* SID string */
+ _cups_md5_state_t md5; /* MD5 state */
+ unsigned char sum[16]; /* MD5 sum */
+ const char *remote_addr, /* REMOTE_ADDR */
+ *server_name, /* SERVER_NAME */
+ *server_port; /* SERVER_PORT */
+
+
+ if ((remote_addr = getenv("REMOTE_ADDR")) == NULL)
+ remote_addr = "REMOTE_ADDR";
+ if ((server_name = getenv("SERVER_NAME")) == NULL)
+ server_name = "SERVER_NAME";
+ if ((server_port = getenv("SERVER_PORT")) == NULL)
+ server_port = "SERVER_PORT";
+
+ CUPS_SRAND(time(NULL));
+ snprintf(buffer, sizeof(buffer), "%s:%s:%s:%02X%02X%02X%02X%02X%02X%02X%02X",
+ remote_addr, server_name, server_port,
+ (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
+ (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
+ (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255,
+ (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255);
+ _cupsMD5Init(&md5);
+ _cupsMD5Append(&md5, (unsigned char *)buffer, (int)strlen(buffer));
+ _cupsMD5Finish(&md5, sum);
+
+ cgiSetCookie(CUPS_SID, httpMD5String(sum, sid), "/", NULL, 0, 0);
+
+ return (cupsGetOption(CUPS_SID, num_cookies, cookies));
+}
+
+
/*
* 'cgi_sort_variables()' - Sort all form variables for faster lookup.
*/
/*
- * End of "$Id: var.c 6649 2007-07-11 21:46:42Z mike $".
+ * End of "$Id$".
*/
projects / thirdparty / cups.git / blobdiff