X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/94ec8c6bb36d0681d3d8e61de9b260b159772799..f9e4952c0d45a2afdc9267c8cc9500462a82ad11:/auth.h diff --git a/auth.h b/auth.h index c4a8ac54..de2222aa 100644 --- a/auth.h +++ b/auth.h @@ -1,3 +1,5 @@ +/* $OpenBSD: auth.h,v 1.49 2004/01/30 09:48:57 markus Exp $ */ + /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -20,33 +22,167 @@ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * */ + #ifndef AUTH_H #define AUTH_H +#include "key.h" +#include "hostfile.h" +#include + +#ifdef HAVE_LOGIN_CAP +#include +#endif +#ifdef BSD_AUTH +#include +#endif +#ifdef KRB5 +#include +#endif + typedef struct Authctxt Authctxt; +typedef struct Authmethod Authmethod; +typedef struct KbdintDevice KbdintDevice; + struct Authctxt { - int success; - int valid; - int attempt; - char *user; - char *service; - struct passwd *pw; + int success; + int postponed; /* authentication needs another step */ + int valid; /* user exists and is allowed to login */ + int attempt; + int failures; + int force_pwchange; + char *user; /* username sent by the client */ + char *service; + struct passwd *pw; /* set if 'valid' */ + char *style; + void *kbdintctxt; +#ifdef BSD_AUTH + auth_session_t *as; +#endif +#ifdef KRB5 + krb5_context krb5_ctx; + krb5_ccache krb5_fwd_ccache; + krb5_principal krb5_user; + char *krb5_ticket_file; +#endif + void *methoddata; }; +/* + * Every authentication method has to handle authentication requests for + * non-existing users, or for users that are not allowed to login. In this + * case 'valid' is set to 0, but 'user' points to the username requested by + * the client. + */ + +struct Authmethod { + char *name; + int (*userauth)(Authctxt *authctxt); + int *enabled; +}; + +/* + * Keyboard interactive device: + * init_ctx returns: non NULL upon success + * query returns: 0 - success, otherwise failure + * respond returns: 0 - success, 1 - need further interaction, + * otherwise - failure + */ +struct KbdintDevice +{ + const char *name; + void* (*init_ctx)(Authctxt*); + int (*query)(void *ctx, char **name, char **infotxt, + u_int *numprompts, char ***prompts, u_int **echo_on); + int (*respond)(void *ctx, u_int numresp, char **responses); + void (*free_ctx)(void *ctx); +}; + +int auth_rhosts(struct passwd *, const char *); +int +auth_rhosts2(struct passwd *, const char *, const char *, const char *); + +int auth_rhosts_rsa(Authctxt *, char *, Key *); +int auth_password(Authctxt *, const char *); +int auth_rsa(Authctxt *, BIGNUM *); +int auth_rsa_challenge_dialog(Key *); +BIGNUM *auth_rsa_generate_challenge(Key *); +int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]); +int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **); + +int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *); +int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); +int user_key_allowed(struct passwd *, Key *); + +#ifdef KRB5 +int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *); +int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt); +int auth_krb5_password(Authctxt *authctxt, const char *password); +void krb5_cleanup_proc(Authctxt *authctxt); +#endif /* KRB5 */ + +#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE) +#include +int auth_shadow_acctexpired(struct spwd *); +int auth_shadow_pwexpired(Authctxt *); +#endif + +#include "auth-pam.h" +void disable_forwarding(void); + +void do_authentication(Authctxt *); +void do_authentication2(Authctxt *); + +void auth_log(Authctxt *, int, char *, char *); +void userauth_finish(Authctxt *, int, char *); +int auth_root_allowed(char *); + +char *auth2_read_banner(void); + +void privsep_challenge_enable(void); + +int auth2_challenge(Authctxt *, char *); +void auth2_challenge_stop(Authctxt *); +int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **); +int bsdauth_respond(void *, u_int, char **); +int skey_query(void *, char **, char **, u_int *, char ***, u_int **); +int skey_respond(void *, u_int, char **); + +int allowed_user(struct passwd *); +struct passwd * getpwnamallow(const char *user); + +char *get_challenge(Authctxt *); +int verify_response(Authctxt *, const char *); +void abandon_challenge_response(Authctxt *); + +char *expand_filename(const char *, struct passwd *); +char *authorized_keys_file(struct passwd *); +char *authorized_keys_file2(struct passwd *); + +int +secure_filename(FILE *, const char *, struct passwd *, char *, size_t); -void do_authentication(void); -void do_authentication2(void); +HostStatus +check_key_in_hostfiles(struct passwd *, Key *, const char *, + const char *, const char *); -void userauth_log(Authctxt *authctxt, int authenticated, char *method); -void userauth_reply(Authctxt *authctxt, int authenticated); +/* hostkey handling */ +Key *get_hostkey_by_index(int); +Key *get_hostkey_by_type(int); +int get_hostkey_index(Key *); +int ssh1_session_key(BIGNUM *); -int auth2_skey(Authctxt *authctxt); +/* debug messages during authentication */ +void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2))); +void auth_debug_send(void); +void auth_debug_reset(void); -int allowed_user(struct passwd * pw); -struct passwd * auth_get_user(void); +struct passwd *fakepw(void); #define AUTH_FAIL_MAX 6 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" +#define SKEY_PROMPT "\nS/Key Password: " #endif