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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "php_snuffleupagus.h"
ZEND_DECLARE_MODULE_GLOBALS(snuffleupagus)
sp_config_tokens const sp_func[] = {
{.func = parse_unserialize, .token = SP_TOKEN_UNSERIALIZE_HMAC},
{.func = parse_random, .token = SP_TOKEN_HARDEN_RANDOM},
{.func = parse_disabled_functions, .token = SP_TOKEN_DISABLE_FUNC},
{.func = parse_readonly_exec, .token = SP_TOKEN_READONLY_EXEC},
{.func = parse_global_strict, .token = SP_TOKEN_GLOBAL_STRICT},
{.func = parse_upload_validation, .token = SP_TOKEN_UPLOAD_VALIDATION},
{.func = parse_cookie_encryption, .token = SP_TOKEN_COOKIE_ENCRYPTION},
{.func = parse_global, .token = SP_TOKEN_GLOBAL},
{.func = parse_auto_cookie_secure, .token = SP_TOKEN_AUTO_COOKIE_SECURE},
{.func = parse_disable_xxe, .token = SP_TOKEN_DISABLE_XXE},
{NULL, NULL}};
/* Top level keyword parsing */
static int parse_line(char *line) {
char *ptr = line;
while (*ptr == ' ' || *ptr == '\t') {
++ptr;
}
if (!*ptr || *ptr == '#' || *ptr == ';') {
return 0;
}
if (strncmp(ptr, SP_TOKEN_BASE, strlen(SP_TOKEN_BASE))) {
sp_log_err("config", "Invalid configuration prefix for '%s'.", line);
return -1;
}
ptr += strlen(SP_TOKEN_BASE);
for (size_t i = 0; sp_func[i].func; i++) {
if (!strncmp(sp_func[i].token, ptr, strlen(sp_func[i].token))) {
return sp_func[i].func(ptr + strlen(sp_func[i].token));
}
}
sp_log_err("config", "Invalid configuration section '%s'.", line);
return -1;
}
/* keyword parsing */
int parse_empty(char *restrict line, char *restrict keyword, void *retval) {
*(bool *)retval = true;
return 0;
}
int parse_int(char *restrict line, char *restrict keyword, void *retval) {
size_t consumed = 0;
char *value = get_param(&consumed, line, SP_TYPE_INT, keyword);
if (value) {
sscanf(value, "%ud", (uint32_t *)retval);
pefree(value, 1);
return consumed;
} else {
sp_log_err("error", "%s) is expecting a valid integer.", keyword);
return -1;
}
}
int parse_php_type(char *restrict line, char *restrict keyword, void *retval) {
size_t consumed = 0;
char *value = get_param(&consumed, line, SP_TYPE_STR, keyword);
if (value) {
if (0 == strcasecmp("undef", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_UNDEF;
} else if (0 == strcasecmp("null", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_NULL;
} else if (0 == strcasecmp("true", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_TRUE;
} else if (0 == strcasecmp("false", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_FALSE;
} else if (0 == strcasecmp("long", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_LONG;
} else if (0 == strcasecmp("double", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_DOUBLE;
} else if (0 == strcasecmp("string", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_STRING;
} else if (0 == strcasecmp("array", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_ARRAY;
} else if (0 == strcasecmp("object", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_OBJECT;
} else if (0 == strcasecmp("resource", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_RESOURCE;
} else if (0 == strcasecmp("reference", value)) {
*(sp_php_type*)retval = SP_PHP_TYPE_REFERENCE;
} else {
pefree(value, 1);
sp_log_err("error", "%s) is expecting a valid php type ('false', 'true',"
" 'array'. 'object', 'long', 'double', 'null', 'resource', 'reference',"
" 'undef').", keyword);
return -1;
}
pefree(value, 1);
return consumed;
} else {
return -1;
}
}
int parse_str(char *restrict line, char *restrict keyword, void *retval) {
char *value = NULL;
size_t consumed = 0;
value = get_param(&consumed, line, SP_TYPE_STR, keyword);
if (value) {
*(char **)retval = value;
return consumed;
}
return -1;
}
int parse_cidr(char *restrict line, char *restrict keyword, void *retval) {
size_t consumed = 0;
char *value = get_param(&consumed, line, SP_TYPE_STR, keyword);
sp_cidr *cidr = pecalloc(sizeof(sp_cidr), 1, 1);
if (value) {
if (-1 == get_ip_and_cidr(value, cidr)) {
return -1;
}
*(sp_cidr **)retval = cidr;
return consumed;
} else {
sp_log_err("config", "%s doesn't contain a valid cidr.", line);
return -1;
}
}
int parse_regexp(char *restrict line, char *restrict keyword, void *retval) {
/* TODO: Do we want to use pcre_study?
* (http://www.pcre.org/original/doc/html/pcre_study.html)
* maybe not: http://sljit.sourceforge.net/pcre.html*/
size_t consumed = 0;
char *value = get_param(&consumed, line, SP_TYPE_STR, keyword);
if (value) {
const char *pcre_error;
int pcre_error_offset;
pcre *compiled_re = sp_pcre_compile(value, PCRE_CASELESS, &pcre_error,
&pcre_error_offset, NULL);
if (NULL == compiled_re) {
sp_log_err("config", "Failed to compile '%s': %s.", value, pcre_error);
} else {
*(pcre **)retval = compiled_re;
return consumed;
}
}
char *closing_paren = strchr(line, ')');
if (NULL != closing_paren) {
closing_paren[0] = '\0';
}
sp_log_err("config", "'%s)' is expecting a valid regexp, and not '%s'.",
keyword, line);
return -1;
}
int sp_parse_config(const char *conf_file) {
FILE *fd = fopen(conf_file, "r");
char *lineptr = NULL;
size_t n = 0;
if (fd == NULL) {
sp_log_err("config", "Could not open configuration file %s : %s", conf_file,
strerror(errno));
return FAILURE;
}
while (getline(&lineptr, &n, fd) > 0) {
/* We trash the terminal `\n`. This simplify the display of logs. */
if (lineptr[strlen(lineptr) - 1] == '\n') {
lineptr[strlen(lineptr) - 1] = '\0';
}
if (parse_line(lineptr) == -1) {
fclose(fd);
free(lineptr);
return FAILURE;
}
free(lineptr);
lineptr = NULL;
n = 0;
}
fclose(fd);
return SUCCESS;
}
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