#include "uidswap.h"
#include "match.h"
#include "servconf.h"
+#include "auth-options.h"
#include <openssl/rsa.h>
#include <openssl/md5.h>
-/* Flags that may be set in authorized_keys options. */
-extern int no_port_forwarding_flag;
-extern int no_agent_forwarding_flag;
-extern int no_x11_forwarding_flag;
-extern int no_pty_flag;
-extern char *forced_command;
-extern struct envstring *custom_environment;
-
/*
* Session identifier that is used to bind key exchange and authentication
* responses to a particular session.
unsigned long linenum = 0;
struct stat st;
RSA *pk;
- int mname, mip;
/* Temporarily use the user's uid. */
temporarily_use_uid(pw->pw_uid);
* authenticated. Note that we have not yet processed the
* options; this will be reset if the options cause the
* authentication to be rejected.
- */
- authenticated = 1;
-
- /* RSA part of authentication was accepted. Now process the options. */
- if (options) {
- while (*options && *options != ' ' && *options != '\t') {
- cp = "no-port-forwarding";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- packet_send_debug("Port forwarding disabled.");
- no_port_forwarding_flag = 1;
- options += strlen(cp);
- goto next_option;
- }
- cp = "no-agent-forwarding";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- packet_send_debug("Agent forwarding disabled.");
- no_agent_forwarding_flag = 1;
- options += strlen(cp);
- goto next_option;
- }
- cp = "no-X11-forwarding";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- packet_send_debug("X11 forwarding disabled.");
- no_x11_forwarding_flag = 1;
- options += strlen(cp);
- goto next_option;
- }
- cp = "no-pty";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- packet_send_debug("Pty allocation disabled.");
- no_pty_flag = 1;
- options += strlen(cp);
- goto next_option;
- }
- cp = "command=\"";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- int i;
- options += strlen(cp);
- forced_command = xmalloc(strlen(options) + 1);
- i = 0;
- while (*options) {
- if (*options == '"')
- break;
- if (*options == '\\' && options[1] == '"') {
- options += 2;
- forced_command[i++] = '"';
- continue;
- }
- forced_command[i++] = *options++;
- }
- if (!*options) {
- debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- packet_send_debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- continue;
- }
- forced_command[i] = 0;
- packet_send_debug("Forced command: %.900s", forced_command);
- options++;
- goto next_option;
- }
- cp = "environment=\"";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- int i;
- char *s;
- struct envstring *new_envstring;
- options += strlen(cp);
- s = xmalloc(strlen(options) + 1);
- i = 0;
- while (*options) {
- if (*options == '"')
- break;
- if (*options == '\\' && options[1] == '"') {
- options += 2;
- s[i++] = '"';
- continue;
- }
- s[i++] = *options++;
- }
- if (!*options) {
- debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- packet_send_debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- continue;
- }
- s[i] = 0;
- packet_send_debug("Adding to environment: %.900s", s);
- debug("Adding to environment: %.900s", s);
- options++;
- new_envstring = xmalloc(sizeof(struct envstring));
- new_envstring->s = s;
- new_envstring->next = custom_environment;
- custom_environment = new_envstring;
- goto next_option;
- }
- cp = "from=\"";
- if (strncmp(options, cp, strlen(cp)) == 0) {
- char *patterns = xmalloc(strlen(options) + 1);
- int i;
- options += strlen(cp);
- i = 0;
- while (*options) {
- if (*options == '"')
- break;
- if (*options == '\\' && options[1] == '"') {
- options += 2;
- patterns[i++] = '"';
- continue;
- }
- patterns[i++] = *options++;
- }
- if (!*options) {
- debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- packet_send_debug("%.100s, line %lu: missing end quote",
- SSH_USER_PERMITTED_KEYS, linenum);
- continue;
- }
- patterns[i] = 0;
- options++;
- /*
- * Deny access if we get a negative
- * match for the hostname or the ip
- * or if we get not match at all
- */
- mname = match_hostname(get_canonical_hostname(),
- patterns, strlen(patterns));
- mip = match_hostname(get_remote_ipaddr(),
- patterns, strlen(patterns));
- if (mname == -1 || mip == -1 ||
- (mname != 1 && mip != 1)) {
- log("RSA authentication tried for %.100s with correct key but not from a permitted host (host=%.200s, ip=%.200s).",
- pw->pw_name, get_canonical_hostname(),
- get_remote_ipaddr());
- packet_send_debug("Your host '%.200s' is not permitted to use this key for login.",
- get_canonical_hostname());
- xfree(patterns);
- /* key invalid for this host, reset flags */
- authenticated = 0;
- no_agent_forwarding_flag = 0;
- no_port_forwarding_flag = 0;
- no_pty_flag = 0;
- no_x11_forwarding_flag = 0;
- while (custom_environment) {
- struct envstring *ce = custom_environment;
- custom_environment = ce->next;
- xfree(ce->s);
- xfree(ce);
- }
- if (forced_command) {
- xfree(forced_command);
- forced_command = NULL;
- }
- break;
- }
- xfree(patterns);
- /* Host name matches. */
- goto next_option;
- }
- bad_option:
- log("Bad options in %.100s file, line %lu: %.50s",
- SSH_USER_PERMITTED_KEYS, linenum, options);
- packet_send_debug("Bad options in %.100s file, line %lu: %.50s",
- SSH_USER_PERMITTED_KEYS, linenum, options);
- authenticated = 0;
- break;
-
- next_option:
- /*
- * Skip the comma, and move to the next option
- * (or break out if there are no more).
- */
- if (!*options)
- fatal("Bugs in auth-rsa.c option processing.");
- if (*options == ' ' || *options == '\t')
- break; /* End of options. */
- if (*options != ',')
- goto bad_option;
- options++;
- /* Process the next option. */
- continue;
- }
- }
- /*
* Break out of the loop if authentication was successful;
* otherwise continue searching.
*/
+ authenticated = auth_parse_options(pw, options, linenum);
if (authenticated)
break;
}
andersk / openssh.git / blobdiff