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#include "hybbx/ssh.h"
#include "hybbx/util.h"
#include <stdlib.h>
#include <string.h>
static unsigned int parse_port(const char *value)
{
char *end;
unsigned long port;
if (value == NULL || value[0] == '\0') {
return HYBBX_SSH_DEFAULT_PORT;
}
port = strtoul(value, &end, 10);
if (end == value || *end != '\0' || port == 0 || port > 65535u) {
return HYBBX_SSH_DEFAULT_PORT;
}
return (unsigned int)port;
}
static const char *find_kv(const char *config, const char *key,
char *scratch, size_t scratch_len)
{
const char *cursor = config;
size_t key_len = strlen(key);
if (config == NULL || key == NULL) {
return NULL;
}
while (*cursor != '\0') {
const char *sep = strchr(cursor, ';');
const char *end = sep != NULL ? sep : cursor + strlen(cursor);
const char *eq = strchr(cursor, '=');
if (eq != NULL && eq < end && (size_t)(eq - cursor) == key_len &&
strncmp(cursor, key, key_len) == 0) {
const char *value = eq + 1;
size_t value_len = (size_t)(end - value);
if (scratch != NULL && scratch_len > 0) {
if (value_len >= scratch_len) {
value_len = scratch_len - 1;
}
memcpy(scratch, value, value_len);
scratch[value_len] = '\0';
return scratch;
}
return value;
}
if (sep == NULL) {
break;
}
cursor = sep + 1;
}
return NULL;
}
void hybbx_ssh_config_defaults(hybbx_ssh_config_t *config)
{
if (config == NULL) {
return;
}
memset(config, 0, sizeof(*config));
hybbx_strlcpy(config->bind_v4, HYBBX_SSH_DEFAULT_BIND_V4,
sizeof(config->bind_v4));
hybbx_strlcpy(config->bind_v6, HYBBX_SSH_DEFAULT_BIND_V6,
sizeof(config->bind_v6));
hybbx_strlcpy(config->hostkey_dir, HYBBX_SSH_DEFAULT_HOSTKEY_DIR,
sizeof(config->hostkey_dir));
config->port = HYBBX_SSH_DEFAULT_PORT;
config->ipv4 = 1;
config->ipv6 = 1;
}
hybbx_result_t hybbx_ssh_config_parse(const char *config,
hybbx_ssh_config_t *out)
{
char scratch[HYBBX_SSH_BIND_V6_MAX];
const char *value;
if (out == NULL) {
return HYBBX_ERR_INVALID;
}
hybbx_ssh_config_defaults(out);
if (config == NULL || config[0] == '\0') {
return HYBBX_OK;
}
value = find_kv(config, "port", scratch, sizeof(scratch));
out->port = parse_port(value);
value = find_kv(config, "bind", scratch, sizeof(scratch));
if (value != NULL && value[0] != '\0') {
if (strchr(value, ':') != NULL) {
hybbx_strlcpy(out->bind_v6, value, sizeof(out->bind_v6));
} else {
hybbx_strlcpy(out->bind_v4, value, sizeof(out->bind_v4));
}
}
value = find_kv(config, "bind6", scratch, sizeof(scratch));
if (value != NULL && value[0] != '\0') {
hybbx_strlcpy(out->bind_v6, value, sizeof(out->bind_v6));
}
value = find_kv(config, "hostkey_dir", scratch, sizeof(scratch));
if (value != NULL && value[0] != '\0') {
hybbx_strlcpy(out->hostkey_dir, value, sizeof(out->hostkey_dir));
}
value = find_kv(config, "ipv4", scratch, sizeof(scratch));
if (value != NULL) {
out->ipv4 = hybbx_parse_bool(value, 1);
}
value = find_kv(config, "ipv6", scratch, sizeof(scratch));
if (value != NULL) {
out->ipv6 = hybbx_parse_bool(value, 1);
}
return HYBBX_OK;
}
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