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13d6e30d01ae6cf92407d1bee53cb03270a3e09f
sesimos/src/lib/config.c

229 lines
7.5 KiB
C
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/**
* sesimos - secure, simple, modern web server
* @brief Configuration file loader
* @file src/lib/config.c
* @author Lorenz Stechauner
* @date 2021-01-05
*/
#include "../logger.h"
#include "config.h"
#include "utils.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
config_t config;
static int config_parse_line(char *line, char *section, int *i, int *j) {
int mode = 0;
char *source, *target;
char *ptr = line;
char *comment = strpbrk(ptr, "#\r\n");
if (comment != NULL) comment[0] = 0;
unsigned long len = strlen(ptr);
char *end_ptr = (len > 0) ? ptr + len - 1 : ptr;
while (end_ptr[0] == ' ' || end_ptr[0] == '\t') {
end_ptr[0] = 0;
end_ptr--;
}
len = strlen(ptr);
if (len == 0) return 0;
if (ptr[0] == '[') {
if (ptr[len - 1] != ']') return -1;
ptr++;
int l = 0;
if (strncmp(ptr, "host", 4) == 0 && (ptr[4] == ' ' || ptr[4] == '\t')) {
ptr += 4;
while (ptr[0] == ' ' || ptr[0] == '\t' || ptr[0] == ']') ptr++;
while (ptr[l] != ' ' && ptr[l] != '\t' && ptr[l] != ']') l++;
if (l == 0) return -1;
snprintf(config.hosts[*i].name, sizeof(config.hosts[*i].name), "%.*s", l, ptr);
++(*i);
*section = 'h';
} else if (strncmp(ptr, "cert", 4) == 0 && (ptr[4] == ' ' || ptr[4] == '\t')) {
ptr += 4;
while (ptr[0] == ' ' || ptr[0] == '\t' || ptr[0] == ']') ptr++;
while (ptr[l] != ' ' && ptr[l] != '\t' && ptr[l] != ']') l++;
if (l == 0) return -1;
snprintf(config.certs[*j].name, sizeof(config.certs[*j].name), "%.*s", l, ptr);
++(*j);
*section = 'c';
} else {
return -1;
}
return 0;
} else if (*section == 0) {
if (len > 10 && strncmp(ptr, "geoip_dir", 9) == 0 && (ptr[9] == ' ' || ptr[9] == '\t')) {
source = ptr + 9;
target = config.geoip_dir;
} else {
return -1;
}
} else if (*section == 'c') {
cert_config_t *cc = &config.certs[*j - 1];
if (len > 12 && strncmp(ptr, "certificate", 11) == 0 && (ptr[11] == ' ' || ptr[11] == '\t')) {
source = ptr + 11;
target = cc->full_chain;
} else if (len > 12 && strncmp(ptr, "private_key", 11) == 0 && (ptr[11] == ' ' || ptr[11] == '\t')) {
source = ptr + 11;
target = cc->priv_key;
} else {
return -1;
}
} else if (*section == 'h') {
host_config_t *hc = &config.hosts[*i - 1];
if (len > 8 && strncmp(ptr, "webroot", 7) == 0 && (ptr[7] == ' ' || ptr[7] == '\t')) {
source = ptr + 7;
target = hc->local.webroot;
if (hc->type != 0 && hc->type != CONFIG_TYPE_LOCAL) {
return -1;
} else {
hc->type = CONFIG_TYPE_LOCAL;
}
} else if (len > 5 && strncmp(ptr, "cert", 4) == 0 && (ptr[4] == ' ' || ptr[4] == '\t')) {
source = ptr + 4;
target = hc->cert_name;
} else if (len > 9 && strncmp(ptr, "dir_mode", 8) == 0 && (ptr[8] == ' ' || ptr[8] == '\t')) {
source = ptr + 8;
target = NULL;
mode = 1;
if (hc->type != 0 && hc->type != CONFIG_TYPE_LOCAL) {
return -1;
} else {
hc->type = CONFIG_TYPE_LOCAL;
}
} else if (len > 9 && strncmp(ptr, "hostname", 8) == 0 && (ptr[8] == ' ' || ptr[8] == '\t')) {
source = ptr + 8;
target = hc->proxy.hostname;
if (hc->type != 0 && hc->type != CONFIG_TYPE_REVERSE_PROXY) {
return -1;
} else {
hc->type = CONFIG_TYPE_REVERSE_PROXY;
}
} else if (len > 5 && strncmp(ptr, "port", 4) == 0 && (ptr[4] == ' ' || ptr[4] == '\t')) {
source = ptr + 4;
target = NULL;
mode = 2;
if (hc->type != 0 && hc->type != CONFIG_TYPE_REVERSE_PROXY) {
return -1;
} else {
hc->type = CONFIG_TYPE_REVERSE_PROXY;
}
} else if (streq(ptr, "http")) {
if (hc->type != 0 && hc->type != CONFIG_TYPE_REVERSE_PROXY) {
return -1;
} else {
hc->type = CONFIG_TYPE_REVERSE_PROXY;
hc->proxy.enc = 0;
}
return 0;
} else if (streq(ptr, "https")) {
if (hc->type != 0 && hc->type != CONFIG_TYPE_REVERSE_PROXY) {
return -1;
} else {
hc->type = CONFIG_TYPE_REVERSE_PROXY;
hc->proxy.enc = 1;
}
return 0;
} else {
return -1;
}
} else {
return -1;
}
while (source[0] == ' ' || source[0] == '\t') source++;
if (strlen(source) == 0) return -1;
if (target != NULL) {
strcpy(target, source);
} else if (mode == 1) {
if (streq(source, "forbidden")) {
config.hosts[*i - 1].local.dir_mode = URI_DIR_MODE_FORBIDDEN;
} else if (streq(source, "info")) {
config.hosts[*i - 1].local.dir_mode = URI_DIR_MODE_INFO;
} else if (streq(source, "list")) {
config.hosts[*i - 1].local.dir_mode = URI_DIR_MODE_LIST;
} else {
return -1;
}
} else if (mode == 2) {
config.hosts[*i - 1].proxy.port = (unsigned short) strtoul(source, NULL, 10);
}
return 0;
}
int config_load(const char *filename) {
FILE *file = fopen(filename, "r");
if (file == NULL) {
critical("Unable to open config file");
return -1;
}
memset(&config, 0, sizeof(config));
int i = 0, j = 0;
char section = 0;
char *line = NULL;
size_t line_len = 0;
for (int line_num = 1; getline(&line, &line_len, file) != -1; line_num++) {
if (config_parse_line(line, &section, &i, &j) != 0) {
critical("Unable to parse config file (line %i)", line_num);
free(line);
fclose(file);
return -2;
}
}
free(line);
fclose(file);
for (int k = 0; k < i; k++) {
host_config_t *hc = &config.hosts[k];
if (hc->type == CONFIG_TYPE_LOCAL) {
char *webroot = config.hosts[k].local.webroot;
while (webroot[strlen(webroot) - 1] == '/') webroot[strlen(webroot) - 1] = 0;
}
if (hc->cert_name[0] == 0) {
critical("Unable to parse config file: host config (%s) does not contain a certificate", hc->name);
return -2;
}
int found = 0;
for (int m = 0; m < j; m++) {
if (streq(config.certs[m].name, hc->cert_name)) {
hc->cert = m;
found = 1;
break;
}
}
if (!found) {
critical("Unable to parse config file: certificate (%s) for host config (%s) not found", hc->cert_name, hc->name);
return -2;
}
}
return 0;
}
host_config_t *get_host_config(const char *host) {
for (int i = 0; i < CONFIG_MAX_HOST_CONFIG; i++) {
host_config_t *hc = &config.hosts[i];
if (hc->type == CONFIG_TYPE_UNSET) break;
if (streq(hc->name, host)) return hc;
if (hc->name[0] == '*' && hc->name[1] == '.') {
const char *pos = strstr(host, hc->name + 1);
if (pos != NULL && strlen(pos) == strlen(hc->name + 1)) return hc;
}
}
return NULL;
}
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