X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/2a1e46390831d514bb362d61dac9d0e1f534f278..822015dda8008714e520ca557865c28023adbc83:/auth.h diff --git a/auth.h b/auth.h index a2994411..471404e4 100644 --- a/auth.h +++ b/auth.h @@ -1,3 +1,5 @@ +/* $OpenBSD: auth.h,v 1.50 2004/05/23 23:59:53 dtucker Exp $ */ + /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -21,13 +23,14 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * $OpenBSD: auth.h,v 1.20 2001/06/26 06:32:47 itojun Exp $ */ + #ifndef AUTH_H #define AUTH_H #include "key.h" #include "hostfile.h" +#include "buffer.h" #include #ifdef HAVE_LOGIN_CAP @@ -36,146 +39,157 @@ #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 postponed; - int valid; - int attempt; - int failures; - char *user; - char *service; - struct passwd *pw; - char *style; - void *kbdintctxt; + 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; + auth_session_t *as; #endif +#ifdef KRB5 + krb5_context krb5_ctx; + krb5_ccache krb5_fwd_ccache; + krb5_principal krb5_user; + char *krb5_ticket_file; + char *krb5_ccname; +#endif + Buffer *loginmsg; + 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 + * 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) __P((Authctxt*)); - int (*query) __P((void *ctx, char **name, char **infotxt, - u_int *numprompts, char ***prompts, - u_int **echo_on)); - int (*respond) __P((void *ctx, u_int numresp, char **responses)); - void (*free_ctx) __P((void *ctx)); + 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); }; -/* - * Tries to authenticate the user using the .rhosts file. Returns true if - * authentication succeeds. If ignore_rhosts is non-zero, this will not - * consider .rhosts and .shosts (/etc/hosts.equiv will still be used). - */ -int auth_rhosts(struct passwd *, const char *); - -/* extended interface similar to auth_rhosts() */ +int auth_rhosts(struct passwd *, const char *); int auth_rhosts2(struct passwd *, const char *, const char *, const char *); -/* - * Tries to authenticate the user using the .rhosts file and the host using - * its host key. Returns true if authentication succeeds. - */ -int -auth_rhosts_rsa(struct passwd *, const char *, RSA *); - -/* - * Tries to authenticate the user using password. Returns true if - * authentication succeeds. - */ -int auth_password(Authctxt *, const char *); - -/* - * Performs the RSA authentication dialog with the client. This returns 0 if - * the client could not be authenticated, and 1 if authentication was - * successful. This may exit if there is a serious protocol violation. - */ -int auth_rsa(struct passwd *, BIGNUM *); - -/* - * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer - * over the key. Skips any whitespace at the beginning and at end. - */ -int auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *); - -/* - * Performs the RSA authentication challenge-response dialog with the client, - * and returns true (non-zero) if the client gave the correct answer to our - * challenge; returns zero if the client gives a wrong answer. - */ -int auth_rsa_challenge_dialog(RSA *); - -#ifdef KRB4 -#include -/* - * Performs Kerberos v4 mutual authentication with the client. This returns 0 - * if the client could not be authenticated, and 1 if authentication was - * successful. This may exit if there is a serious protocol violation. - */ -int auth_krb4(const char *, KTEXT, char **); -int krb4_init(uid_t); -void krb4_cleanup_proc(void *); -int auth_krb4_password(struct passwd *, const char *); - -#ifdef AFS -#include - -/* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */ -int auth_kerberos_tgt(struct passwd *, const char *); -int auth_afs_token(struct passwd *, const char *); -#endif /* AFS */ - -#endif /* KRB4 */ +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" -#include "auth2-pam.h" +#include "audit.h" +void remove_kbdint_device(const char *); + +void disable_forwarding(void); -void do_authentication(void); -void do_authentication2(void); +void do_authentication(Authctxt *); +void do_authentication2(Authctxt *); -Authctxt *authctxt_new(void); void auth_log(Authctxt *, int, char *, char *); void userauth_finish(Authctxt *, int, char *); +void userauth_send_banner(const 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 *); -struct passwd * auth_get_user(void); - -/* expand a filename - return buffer is allocated by xmalloc */ char *expand_filename(const char *, struct passwd *); char *authorized_keys_file(struct passwd *); char *authorized_keys_file2(struct passwd *); -/* check a file and the path to it */ int secure_filename(FILE *, const char *, struct passwd *, char *, size_t); -/* helper for hostbased auth */ HostStatus check_key_in_hostfiles(struct passwd *, Key *, const char *, const char *, const char *); -#define AUTH_FAIL_MAX 6 -#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) +/* hostkey handling */ +Key *get_hostkey_by_index(int); +Key *get_hostkey_by_type(int); +int get_hostkey_index(Key *); +int ssh1_session_key(BIGNUM *); + +/* 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); + +struct passwd *fakepw(void); + +int sys_auth_passwd(Authctxt *, const char *); + #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" +#define SKEY_PROMPT "\nS/Key Password: " #endif