*/
-/* ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl
+/* ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl
**
-** 19990701 VRS Started.
+** 19990701 VRS Started.
+** 200011?? Jeffrey Altman, Richard Levitte
+** Generalized for Heimdal, Newer MIT, & Win32.
+** Integrated into main OpenSSL 0.9.7 snapshots.
+** 20010413 Simon Wilkinson, VRS
+** Real RFC2712 KerberosWrapper replaces AP_REQ.
*/
#include <openssl/opensslconf.h>
-#ifndef NO_KRB5
+
+#define _XOPEN_SOURCE /* glibc2 needs this to declare strptime() */
+#include <time.h>
+#undef _XOPEN_SOURCE /* To avoid clashes with anything else... */
#include <string.h>
+
+#define KRB5_PRIVATE 1
+
#include <openssl/ssl.h>
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include <openssl/krb5_asn.h>
+
+#ifndef OPENSSL_NO_KRB5
+
+#ifndef ENOMEM
+#define ENOMEM KRB5KRB_ERR_GENERIC
+#endif
/*
* When OpenSSL is built on Windows, we do not want to require that
* and we do not link to a .LIB file.
*/
-#if defined(WINDOWS) || defined(WIN32)
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
/*
* The purpose of the following pre-processor statements is to provide
* compatibility with different releases of MIT Kerberos for Windows.
#define krb5_rd_req kssl_krb5_rd_req
#define krb5_kt_default kssl_krb5_kt_default
#define krb5_kt_resolve kssl_krb5_kt_resolve
+/* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
+#ifndef krb5_kt_close
+#define krb5_kt_close kssl_krb5_kt_close
+#endif /* krb5_kt_close */
+#ifndef krb5_kt_get_entry
+#define krb5_kt_get_entry kssl_krb5_kt_get_entry
+#endif /* krb5_kt_get_entry */
#define krb5_auth_con_init kssl_krb5_auth_con_init
+#define krb5_principal_compare kssl_krb5_principal_compare
+#define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part
+#define krb5_timeofday kssl_krb5_timeofday
+#define krb5_rc_default kssl_krb5_rc_default
+
+#ifdef krb5_rc_initialize
+#undef krb5_rc_initialize
+#endif
+#define krb5_rc_initialize kssl_krb5_rc_initialize
+
+#ifdef krb5_rc_get_lifespan
+#undef krb5_rc_get_lifespan
+#endif
+#define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
+
+#ifdef krb5_rc_destroy
+#undef krb5_rc_destroy
+#endif
+#define krb5_rc_destroy kssl_krb5_rc_destroy
+
+#define valid_cksumtype kssl_valid_cksumtype
+#define krb5_checksum_size kssl_krb5_checksum_size
+#define krb5_kt_free_entry kssl_krb5_kt_free_entry
+#define krb5_auth_con_setrcache kssl_krb5_auth_con_setrcache
+#define krb5_auth_con_getrcache kssl_krb5_auth_con_getrcache
+#define krb5_get_server_rcache kssl_krb5_get_server_rcache
+
/* Prototypes for built in stubs */
void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
void kssl_krb5_free_principal(krb5_context, krb5_principal );
krb5_const krb5_data *,
krb5_const_principal, krb5_keytab,
krb5_flags *,krb5_ticket **);
+
+krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
+ krb5_const_principal);
krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
krb5_auth_context *,
krb5_const krb5_flags,
krb5_ccache cache,
krb5_principal *principal);
krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
+size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
+krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
+krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
+krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
+ krb5_auth_context,
+ krb5_rcache);
+krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
+ krb5_const krb5_data *,
+ krb5_rcache *);
+krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
+ krb5_auth_context,
+ krb5_rcache *);
/* Function pointers (almost all Kerberos functions are _stdcall) */
-static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)=NULL;
-static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )=NULL;
-static krb5_error_code(_stdcall *p_krb5_kt_resolve)(krb5_context, krb5_const char *,
- krb5_keytab *)=NULL;
+static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
+ =NULL;
+static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
+ =NULL;
+static krb5_error_code(_stdcall *p_krb5_kt_resolve)
+ (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
krb5_keytab *)=NULL;
static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
krb5_const_principal,
krb5_keytab, krb5_flags *,
krb5_ticket **)=NULL;
-static krb5_error_code (_stdcall *p_krb5_mk_req_extended) (krb5_context,
- krb5_auth_context *,
- krb5_const krb5_flags,
- krb5_data *,
- krb5_creds *,
- krb5_data * )=NULL;
+static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
+ (krb5_context, krb5_auth_context *,
+ krb5_const krb5_flags, krb5_data *, krb5_creds *,
+ krb5_data * )=NULL;
static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
krb5_ccache *)=NULL;
-static krb5_error_code (_stdcall *p_krb5_sname_to_principal)(krb5_context,
- krb5_const char *,
- krb5_const char *,
- krb5_int32,
- krb5_principal *)=NULL;
-static krb5_error_code (_stdcall *p_krb5_get_credentials)(krb5_context,
- krb5_const krb5_flags,
- krb5_ccache,
- krb5_creds *,
- krb5_creds * *)=NULL;
-static krb5_error_code (_stdcall *p_krb5_auth_con_init)(krb5_context,
- krb5_auth_context *)=NULL;
-static krb5_error_code (_stdcall *p_krb5_cc_get_principal)(krb5_context context,
- krb5_ccache cache,
- krb5_principal *principal)=NULL;
-static krb5_error_code (_stdcall *p_krb5_auth_con_free)(krb5_context,
- krb5_auth_context)=NULL;
+static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
+ (krb5_context, krb5_const char *, krb5_const char *,
+ krb5_int32, krb5_principal *)=NULL;
+static krb5_error_code (_stdcall *p_krb5_get_credentials)
+ (krb5_context, krb5_const krb5_flags, krb5_ccache,
+ krb5_creds *, krb5_creds **)=NULL;
+static krb5_error_code (_stdcall *p_krb5_auth_con_init)
+ (krb5_context, krb5_auth_context *)=NULL;
+static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
+ (krb5_context context, krb5_ccache cache,
+ krb5_principal *principal)=NULL;
+static krb5_error_code (_stdcall *p_krb5_auth_con_free)
+ (krb5_context, krb5_auth_context)=NULL;
+static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
+ (krb5_context, krb5_const krb5_keyblock *,
+ krb5_ticket *)=NULL;
+static krb5_error_code (_stdcall *p_krb5_timeofday)
+ (krb5_context context, krb5_int32 *timeret)=NULL;
+static krb5_error_code (_stdcall *p_krb5_rc_default)
+ (krb5_context context, krb5_rcache *rc)=NULL;
+static krb5_error_code (_stdcall *p_krb5_rc_initialize)
+ (krb5_context context, krb5_rcache rc,
+ krb5_deltat lifespan)=NULL;
+static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
+ (krb5_context context, krb5_rcache rc,
+ krb5_deltat *lifespan)=NULL;
+static krb5_error_code (_stdcall *p_krb5_rc_destroy)
+ (krb5_context context, krb5_rcache rc)=NULL;
+static krb5_boolean (_stdcall *p_krb5_principal_compare)
+ (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
+static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
+static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
+static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
+ (krb5_context,krb5_keytab_entry * )=NULL;
+static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context,
+ krb5_auth_context,
+ krb5_rcache)=NULL;
+static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context,
+ krb5_const krb5_data *,
+ krb5_rcache *)=NULL;
+static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
+ krb5_auth_context,
+ krb5_rcache *)=NULL;
+static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context,
+ krb5_keytab keytab)=NULL;
+static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context,
+ krb5_keytab keytab,
+ krb5_const_principal principal, krb5_kvno vno,
+ krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
/* Function to Load the Kerberos 5 DLL and initialize function pointers */
GetProcAddress( hKRB5_32, "krb5_free_ticket" );
(FARPROC) p_krb5_rd_req =
GetProcAddress( hKRB5_32, "krb5_rd_req" );
+ (FARPROC) p_krb5_principal_compare =
+ GetProcAddress( hKRB5_32, "krb5_principal_compare" );
+ (FARPROC) p_krb5_decrypt_tkt_part =
+ GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
+ (FARPROC) p_krb5_timeofday =
+ GetProcAddress( hKRB5_32, "krb5_timeofday" );
+ (FARPROC) p_krb5_rc_default =
+ GetProcAddress( hKRB5_32, "krb5_rc_default" );
+ (FARPROC) p_krb5_rc_initialize =
+ GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
+ (FARPROC) p_krb5_rc_get_lifespan =
+ GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
+ (FARPROC) p_krb5_rc_destroy =
+ GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
(FARPROC) p_krb5_kt_default =
GetProcAddress( hKRB5_32, "krb5_kt_default" );
(FARPROC) p_krb5_kt_resolve =
GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
(FARPROC) p_krb5_auth_con_init =
GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
+ (FARPROC) p_valid_cksumtype =
+ GetProcAddress( hKRB5_32, "valid_cksumtype" );
+ (FARPROC) p_krb5_checksum_size =
+ GetProcAddress( hKRB5_32, "krb5_checksum_size" );
+ (FARPROC) p_krb5_kt_free_entry =
+ GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
+ (FARPROC) p_krb5_auth_con_setrcache =
+ GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
+ (FARPROC) p_krb5_get_server_rcache =
+ GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
+ (FARPROC) p_krb5_auth_con_getrcache =
+ GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
+ (FARPROC) p_krb5_kt_close =
+ GetProcAddress( hKRB5_32, "krb5_kt_close" );
+ (FARPROC) p_krb5_kt_get_entry =
+ GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
}
/* Stubs for each function to be dynamicly loaded */
return KRB5KRB_ERR_GENERIC;
}
+krb5_boolean
+krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
+ krb5_const_principal princ2)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_principal_compare )
+ return(p_krb5_principal_compare(con,princ1,princ2));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
+ krb5_ticket *ticket)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_decrypt_tkt_part )
+ return(p_krb5_decrypt_tkt_part(con,keys,ticket));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_timeofday(krb5_context con, krb5_int32 *timeret)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_timeofday )
+ return(p_krb5_timeofday(con,timeret));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_rc_default(krb5_context con, krb5_rcache *rc)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_rc_default )
+ return(p_krb5_rc_default(con,rc));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_rc_initialize )
+ return(p_krb5_rc_initialize(con, rc, lifespan));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_rc_get_lifespan )
+ return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_rc_destroy(krb5_context con, krb5_rcache rc)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_rc_destroy )
+ return(p_krb5_rc_destroy(con, rc));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+size_t
+krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_checksum_size )
+ return(p_krb5_checksum_size(context, ctype));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_boolean
+valid_cksumtype(krb5_cksumtype ctype)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_valid_cksumtype )
+ return(p_valid_cksumtype(ctype));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
+ {
+ if (!krb5_loaded)
+ load_krb5_dll();
+
+ if ( p_krb5_kt_free_entry )
+ return(p_krb5_kt_free_entry(con,entry));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
/* Structure definitions */
#ifndef NO_DEF_KRB5_CCACHE
#ifndef krb5_x
{
krb5_magic magic;
char *prefix;
- char * (KRB5_CALLCONV *get_name) KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
- krb5_error_code (KRB5_CALLCONV *resolve) KRB5_NPROTOTYPE((krb5_context, krb5_ccache *,
- const char *));
- krb5_error_code (KRB5_CALLCONV *gen_new) KRB5_NPROTOTYPE((krb5_context, krb5_ccache *));
- krb5_error_code (KRB5_CALLCONV *init) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_principal));
- krb5_error_code (KRB5_CALLCONV *destroy) KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
- krb5_error_code (KRB5_CALLCONV *close) KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
- krb5_error_code (KRB5_CALLCONV *store) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_creds *));
- krb5_error_code (KRB5_CALLCONV *retrieve) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_flags, krb5_creds *,
- krb5_creds *));
- krb5_error_code (KRB5_CALLCONV *get_princ) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_principal *));
- krb5_error_code (KRB5_CALLCONV *get_first) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_cc_cursor *));
- krb5_error_code (KRB5_CALLCONV *get_next) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_cc_cursor *, krb5_creds *));
- krb5_error_code (KRB5_CALLCONV *end_get) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_cc_cursor *));
- krb5_error_code (KRB5_CALLCONV *remove_cred) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_flags, krb5_creds *));
- krb5_error_code (KRB5_CALLCONV *set_flags) KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
- krb5_flags));
+ char * (KRB5_CALLCONV *get_name)
+ (krb5_context, krb5_ccache);
+ krb5_error_code (KRB5_CALLCONV *resolve)
+ (krb5_context, krb5_ccache *, const char *);
+ krb5_error_code (KRB5_CALLCONV *gen_new)
+ (krb5_context, krb5_ccache *);
+ krb5_error_code (KRB5_CALLCONV *init)
+ (krb5_context, krb5_ccache, krb5_principal);
+ krb5_error_code (KRB5_CALLCONV *destroy)
+ (krb5_context, krb5_ccache);
+ krb5_error_code (KRB5_CALLCONV *close)
+ (krb5_context, krb5_ccache);
+ krb5_error_code (KRB5_CALLCONV *store)
+ (krb5_context, krb5_ccache, krb5_creds *);
+ krb5_error_code (KRB5_CALLCONV *retrieve)
+ (krb5_context, krb5_ccache,
+ krb5_flags, krb5_creds *, krb5_creds *);
+ krb5_error_code (KRB5_CALLCONV *get_princ)
+ (krb5_context, krb5_ccache, krb5_principal *);
+ krb5_error_code (KRB5_CALLCONV *get_first)
+ (krb5_context, krb5_ccache, krb5_cc_cursor *);
+ krb5_error_code (KRB5_CALLCONV *get_next)
+ (krb5_context, krb5_ccache,
+ krb5_cc_cursor *, krb5_creds *);
+ krb5_error_code (KRB5_CALLCONV *end_get)
+ (krb5_context, krb5_ccache, krb5_cc_cursor *);
+ krb5_error_code (KRB5_CALLCONV *remove_cred)
+ (krb5_context, krb5_ccache,
+ krb5_flags, krb5_creds *);
+ krb5_error_code (KRB5_CALLCONV *set_flags)
+ (krb5_context, krb5_ccache, krb5_flags);
} krb5_cc_ops;
#endif /* NO_DEF_KRB5_CCACHE */
if ( p_krb5_cc_get_principal )
return(p_krb5_cc_get_principal(context,cache,principal));
else
- return(krb5_x ((cache)->ops->get_princ,(context, cache, principal)));
+ return(krb5_x
+ ((cache)->ops->get_princ,(context, cache, principal)));
+ }
+
+krb5_error_code
+kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
+ krb5_rcache rcache)
+ {
+ if ( p_krb5_auth_con_setrcache )
+ return(p_krb5_auth_con_setrcache(con,acon,rcache));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
+ krb5_rcache * rcache)
+ {
+ if ( p_krb5_get_server_rcache )
+ return(p_krb5_get_server_rcache(con,data,rcache));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
+ krb5_rcache * prcache)
+ {
+ if ( p_krb5_auth_con_getrcache )
+ return(p_krb5_auth_con_getrcache(con,acon, prcache));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+krb5_error_code
+kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
+ {
+ if ( p_krb5_kt_close )
+ return(p_krb5_kt_close(context,keytab));
+ else
+ return KRB5KRB_ERR_GENERIC;
}
-#endif /* WINDOWS || WIN32 */
+
+krb5_error_code
+kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
+ krb5_const_principal principal, krb5_kvno vno,
+ krb5_enctype enctype, krb5_keytab_entry *entry)
+ {
+ if ( p_krb5_kt_get_entry )
+ return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
+ else
+ return KRB5KRB_ERR_GENERIC;
+ }
+#endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
char
*kstring(char *string)
return ((string == NULL)? null: string);
}
-#define MAXKNUM 255
-char
-*knumber(int len, krb5_octet *contents)
+/* Given KRB5 enctype (basically DES or 3DES),
+** return closest match openssl EVP_ encryption algorithm.
+** Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
+** Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
+*/
+const EVP_CIPHER *
+kssl_map_enc(krb5_enctype enctype)
{
- static char buf[MAXKNUM+1];
- int i;
+ switch (enctype)
+ {
+ case ENCTYPE_DES_HMAC_SHA1: /* EVP_des_cbc(); */
+ case ENCTYPE_DES_CBC_CRC:
+ case ENCTYPE_DES_CBC_MD4:
+ case ENCTYPE_DES_CBC_MD5:
+ case ENCTYPE_DES_CBC_RAW:
+ return EVP_des_cbc();
+ break;
+ case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
+ case ENCTYPE_DES3_CBC_SHA:
+ case ENCTYPE_DES3_CBC_RAW:
+ return EVP_des_ede3_cbc();
+ break;
+ default: return NULL;
+ break;
+ }
+ }
- BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
- for (i=0; i < len && MAXKNUM > strlen(buf)+3; i++)
- {
- BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
- }
+/* Return true:1 if p "looks like" the start of the real authenticator
+** described in kssl_skip_confound() below. The ASN.1 pattern is
+** "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
+** xx and yy are possibly multi-byte length fields.
+*/
+int kssl_test_confound(unsigned char *p)
+ {
+ int len = 2;
+ int xx = 0, yy = 0;
+
+ if (*p++ != 0x62) return 0;
+ if (*p > 0x82) return 0;
+ switch(*p) {
+ case 0x82: p++; xx = (*p++ << 8); xx += *p++; break;
+ case 0x81: p++; xx = *p++; break;
+ case 0x80: return 0;
+ default: xx = *p++; break;
+ }
+ if (*p++ != 0x30) return 0;
+ if (*p > 0x82) return 0;
+ switch(*p) {
+ case 0x82: p++; len+=2; yy = (*p++ << 8); yy += *p++; break;
+ case 0x81: p++; len++; yy = *p++; break;
+ case 0x80: return 0;
+ default: yy = *p++; break;
+ }
+
+ return (xx - len == yy)? 1: 0;
+ }
+
+/* Allocate, fill, and return cksumlens array of checksum lengths.
+** This array holds just the unique elements from the krb5_cksumarray[].
+** array[n] == 0 signals end of data.
+**
+** The krb5_cksumarray[] was an internal variable that has since been
+** replaced by a more general method for storing the data. It should
+** not be used. Instead we use real API calls and make a guess for
+** what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2
+** it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010.
+*/
+size_t *populate_cksumlens(void)
+ {
+ int i, j, n;
+ static size_t *cklens = NULL;
+
+#ifdef KRB5_MIT_OLD11
+ n = krb5_max_cksum;
+#else
+ n = 0x0010;
+#endif /* KRB5_MIT_OLD11 */
+
+#ifdef KRB5CHECKAUTH
+ if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1))) return NULL;
+
+ for (i=0; i < n; i++) {
+ if (!valid_cksumtype(i)) continue; /* array has holes */
+ for (j=0; j < n; j++) {
+ if (cklens[j] == 0) {
+ cklens[j] = krb5_checksum_size(NULL,i);
+ break; /* krb5 elem was new: add */
+ }
+ if (cklens[j] == krb5_checksum_size(NULL,i)) {
+ break; /* ignore duplicate elements */
+ }
+ }
+ }
+#endif /* KRB5CHECKAUTH */
+
+ return cklens;
+ }
+
+/* Return pointer to start of real authenticator within authenticator, or
+** return NULL on error.
+** Decrypted authenticator looks like this:
+** [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
+** This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
+** krb5_auth_con_getcksumtype() function advertised in its krb5.h.
+*/
+unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
+ {
+ int i, conlen;
+ size_t cklen;
+ static size_t *cksumlens = NULL;
+ unsigned char *test_auth;
+
+ conlen = (etype)? 8: 0;
+
+ if (!cksumlens && !(cksumlens = populate_cksumlens())) return NULL;
+ for (i=0; (cklen = cksumlens[i]) != 0; i++)
+ {
+ test_auth = a + conlen + cklen;
+ if (kssl_test_confound(test_auth)) return test_auth;
+ }
- return (buf);
+ return NULL;
}
void
print_krb5_data(char *label, krb5_data *kdata)
{
- int i;
+ int i;
printf("%s[%d] ", label, kdata->length);
- for (i=0; i < kdata->length; i++)
+ for (i=0; i < (int)kdata->length; i++)
{
- if (isprint((int) kdata->data[i]))
+ if (0 && isprint((int) kdata->data[i]))
printf( "%c ", kdata->data[i]);
else
- printf( "%02x", kdata->data[i]);
+ printf( "%02x ", (unsigned char) kdata->data[i]);
}
printf("\n");
}
printf("%s, authdata==0\n", label);
return;
}
- printf("%s [%p]\n", label, adata);
+ printf("%s [%p]\n", label, (void *)adata);
#if 0
{
int i;
void
print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
{
- int i;
+ int i;
if (keyblk == NULL)
{
return;
}
#ifdef KRB5_HEIMDAL
- printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype, keyblk->keyvalue->length);
- for (i=0; i < keyblk->keyvalue->length; i++)
+ printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
+ keyblk->keyvalue->length);
+ for (i=0; i < (int)keyblk->keyvalue->length; i++)
{
printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
}
printf("\n");
#else
printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
- for (i=0; i < keyblk->length; i++)
+ for (i=0; i < (int)keyblk->length; i++)
{
printf("%02x",keyblk->contents[i]);
}
}
+/* Display contents of krb5_principal_data struct, for debugging
+** (krb5_principal is typedef'd == krb5_principal_data *)
+*/
+void
+print_krb5_princ(char *label, krb5_principal_data *princ)
+ {
+ int i, ui, uj;
+
+ printf("%s principal Realm: ", label);
+ if (princ == NULL) return;
+ for (ui=0; ui < (int)princ->realm.length; ui++) putchar(princ->realm.data[ui]);
+ printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
+ for (i=0; i < (int)princ->length; i++)
+ {
+ printf("\t%d [%d]: ", i, princ->data[i].length);
+ for (uj=0; uj < (int)princ->data[i].length; uj++) {
+ putchar(princ->data[i].data[uj]);
+ }
+ printf("\n");
+ }
+ return;
+ }
+
+
/* Given krb5 service (typically "kssl") and hostname in kssl_ctx,
-** Create Kerberos AP_REQ message for SSL Client.
+** Return encrypted Kerberos ticket for service @ hostname.
+** If authenp is non-NULL, also return encrypted authenticator,
+** whose data should be freed by caller.
+** (Originally was: Create Kerberos AP_REQ message for SSL Client.)
**
-** 19990628 VRS Started.
+** 19990628 VRS Started; Returns Kerberos AP_REQ message.
+** 20010409 VRS Modified for RFC2712; Returns enc tkt.
+** 20010606 VRS May also return optional authenticator.
*/
krb5_error_code
kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
- /* OUT */ krb5_data *krb5_app_req, KSSL_ERR *kssl_err)
+ /* OUT */ krb5_data **enc_ticketp,
+ /* UPDATE */ krb5_data *authenp,
+ /* OUT */ KSSL_ERR *kssl_err)
{
krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
krb5_context krb5context = NULL;
krb5_auth_context krb5auth_context = NULL;
krb5_ccache krb5ccdef = NULL;
krb5_creds krb5creds, *krb5credsp = NULL;
- krb5_data krb5in_data;
+ krb5_data krb5_app_req;
kssl_err_set(kssl_err, 0, "");
memset((char *)&krb5creds, 0, sizeof(krb5creds));
BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
"krb5_sname_to_principal() fails for %s/%s\n",
kssl_ctx->service_host,
- (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC);
+ (kssl_ctx->service_name)? kssl_ctx->service_name:
+ KRB5SVC);
kssl_err->reason = SSL_R_KRB5_C_INIT;
goto err;
}
goto err;
}
- krb5in_data.data = NULL;
- krb5in_data.length = 0;
+ *enc_ticketp = &krb5credsp->ticket;
+#ifdef KRB5_HEIMDAL
+ kssl_ctx->enctype = krb5credsp->session.keytype;
+#else
+ kssl_ctx->enctype = krb5credsp->keyblock.enctype;
+#endif
krb5rc = KRB5KRB_ERR_GENERIC;
/* caller should free data of krb5_app_req */
- if ((krb5rc = krb5_mk_req_extended(krb5context, &krb5auth_context,
- 0, &krb5in_data, krb5credsp, krb5_app_req)) != 0)
+ /* 20010406 VRS deleted for real KerberosWrapper
+ ** 20010605 VRS reinstated to offer Authenticator to KerberosWrapper
+ */
+ krb5_app_req.length = 0;
+ if (authenp)
{
- kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
- "krb5_mk_req_extended() fails.\n");
- goto err;
+ krb5_data krb5in_data;
+ unsigned char *p;
+ long arlen;
+ KRB5_APREQBODY *ap_req;
+
+ authenp->length = 0;
+ krb5in_data.data = NULL;
+ krb5in_data.length = 0;
+ if ((krb5rc = krb5_mk_req_extended(krb5context,
+ &krb5auth_context, 0, &krb5in_data, krb5credsp,
+ &krb5_app_req)) != 0)
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
+ "krb5_mk_req_extended() fails.\n");
+ goto err;
+ }
+
+ arlen = krb5_app_req.length;
+ p = (unsigned char *)krb5_app_req.data;
+ ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
+ if (ap_req)
+ {
+ authenp->length = i2d_KRB5_ENCDATA(
+ ap_req->authenticator, NULL);
+ if (authenp->length &&
+ (authenp->data = malloc(authenp->length)))
+ {
+ unsigned char *adp = (unsigned char *)authenp->data;
+ authenp->length = i2d_KRB5_ENCDATA(
+ ap_req->authenticator, &adp);
+ }
+ }
+
+ if (ap_req) KRB5_APREQ_free((KRB5_APREQ *) ap_req);
+ if (krb5_app_req.length)
+ kssl_krb5_free_data_contents(krb5context,&krb5_app_req);
}
#ifdef KRB5_HEIMDAL
- else if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
+ if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
{
kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
"kssl_ctx_setkey() fails.\n");
}
#else
- else if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
+ if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
{
kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
"kssl_ctx_setkey() fails.\n");
kssl_ctx_show(kssl_ctx);
#endif /* KSSL_DEBUG */
- if (krb5creds.client) krb5_free_principal(krb5context, krb5creds.client);
- if (krb5creds.server) krb5_free_principal(krb5context, krb5creds.server);
- if (krb5auth_context) krb5_auth_con_free(krb5context, krb5auth_context);
+ if (krb5creds.client) krb5_free_principal(krb5context,
+ krb5creds.client);
+ if (krb5creds.server) krb5_free_principal(krb5context,
+ krb5creds.server);
+ if (krb5auth_context) krb5_auth_con_free(krb5context,
+ krb5auth_context);
if (krb5context) krb5_free_context(krb5context);
return (krb5rc);
}
+/* Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
+** Return Kerberos error code and kssl_err struct on error.
+** Allocates krb5_ticket and krb5_principal; caller should free these.
+**
+** 20010410 VRS Implemented krb5_decode_ticket() as
+** old_krb5_decode_ticket(). Missing from MIT1.0.6.
+** 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions.
+** Re-used some of the old krb5_decode_ticket()
+** code here. This tkt should alloc/free just
+** like the real thing.
+*/
+krb5_error_code
+kssl_TKT2tkt( /* IN */ krb5_context krb5context,
+ /* IN */ KRB5_TKTBODY *asn1ticket,
+ /* OUT */ krb5_ticket **krb5ticket,
+ /* OUT */ KSSL_ERR *kssl_err )
+ {
+ krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
+ krb5_ticket *new5ticket = NULL;
+ ASN1_GENERALSTRING *gstr_svc, *gstr_host;
+
+ *krb5ticket = NULL;
+
+ if (asn1ticket == NULL || asn1ticket->realm == NULL ||
+ asn1ticket->sname == NULL ||
+ sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2)
+ {
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "Null field in asn1ticket.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ return KRB5KRB_ERR_GENERIC;
+ }
+
+ if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
+ {
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "Unable to allocate new krb5_ticket.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
+ }
+
+ gstr_svc = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
+ gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
+
+ if ((krb5rc = kssl_build_principal_2(krb5context,
+ &new5ticket->server,
+ asn1ticket->realm->length, (char *)asn1ticket->realm->data,
+ gstr_svc->length, (char *)gstr_svc->data,
+ gstr_host->length, (char *)gstr_host->data)) != 0)
+ {
+ free(new5ticket);
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "Error building ticket server principal.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ return krb5rc; /* or KRB5KRB_ERR_GENERIC; */
+ }
+
+ krb5_princ_type(krb5context, new5ticket->server) =
+ asn1ticket->sname->nametype->data[0];
+ new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
+ new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
+ new5ticket->enc_part.ciphertext.length =
+ asn1ticket->encdata->cipher->length;
+ if ((new5ticket->enc_part.ciphertext.data =
+ calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
+ {
+ free(new5ticket);
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "Error allocating cipher in krb5ticket.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ return KRB5KRB_ERR_GENERIC;
+ }
+ else
+ {
+ memcpy(new5ticket->enc_part.ciphertext.data,
+ asn1ticket->encdata->cipher->data,
+ asn1ticket->encdata->cipher->length);
+ }
+
+ *krb5ticket = new5ticket;
+ return 0;
+ }
+
+
/* Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
** and krb5 AP_REQ message & message length,
** Return Kerberos session key and client principle
** 19990702 VRS Started.
*/
krb5_error_code
-kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
- /* IN */ char *msg, int msglen,
- /* OUT */ KSSL_ERR *kssl_err )
+kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
+ /* IN */ krb5_data *indata,
+ /* OUT */ krb5_ticket_times *ttimes,
+ /* OUT */ KSSL_ERR *kssl_err )
{
krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
static krb5_context krb5context = NULL;
static krb5_auth_context krb5auth_context = NULL;
krb5_ticket *krb5ticket = NULL;
+ KRB5_TKTBODY *asn1ticket = NULL;
+ unsigned char *p;
krb5_keytab krb5keytab = NULL;
+ krb5_keytab_entry kt_entry;
krb5_principal krb5server;
- krb5_data krb5in_data;
- krb5_flags ap_option;
+ krb5_rcache rcache = NULL;
kssl_err_set(kssl_err, 0, "");
if (!kssl_ctx)
{
- kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, "No kssl_ctx defined.\n");
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "No kssl_ctx defined.\n");
goto err;
}
goto err;
}
+
+ if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
+ &rcache)))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "krb5_auth_con_getrcache() fails.\n");
+ goto err;
+ }
+
if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
(kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
KRB5_NT_SRV_HST, &krb5server)) != 0)
goto err;
}
+ if (rcache == NULL)
+ {
+ if ((krb5rc = krb5_get_server_rcache(krb5context,
+ krb5_princ_component(krb5context, krb5server, 0),
+ &rcache)))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "krb5_get_server_rcache() fails.\n");
+ goto err;
+ }
+ }
+
+ if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "krb5_auth_con_setrcache() fails.\n");
+ goto err;
+ }
+
+
/* kssl_ctx->keytab_file == NULL ==> use Kerberos default
*/
if (kssl_ctx->keytab_file)
}
/* Actual Kerberos5 krb5_recvauth() has initial conversation here
- ** o check KRB5_SENDAUTH_BADAUTHVERS unless KRB5_RECVAUTH_SKIP_VERSION
+ ** o check KRB5_SENDAUTH_BADAUTHVERS
+ ** unless KRB5_RECVAUTH_SKIP_VERSION
** o check KRB5_SENDAUTH_BADAPPLVERS
** o send "0" msg if all OK
*/
- krb5in_data.data = msg;
- krb5in_data.length = msglen;
- if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context, &krb5in_data,
- krb5server, krb5keytab, &ap_option, &krb5ticket)) != 0)
- {
+ /* 20010411 was using AP_REQ instead of true KerberosWrapper
+ **
+ ** if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
+ ** &krb5in_data, krb5server, krb5keytab,
+ ** &ap_option, &krb5ticket)) != 0) { Error }
+ */
+
+ p = (unsigned char *)indata->data;
+ if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
+ (long) indata->length)) == NULL)
+ {
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ goto err;
+ }
+
+ /* Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
+ if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
+ kssl_err)) != 0)
+ {
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "Error converting ASN.1 ticket to krb5_ticket.\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ goto err;
+ }
+
+ if (! krb5_principal_compare(krb5context, krb5server,
+ krb5ticket->server)) {
+ krb5rc = KRB5_PRINC_NOMATCH;
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "server principal != ticket principal\n");
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ goto err;
+ }
+ if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
+ krb5ticket->server, krb5ticket->enc_part.kvno,
+ krb5ticket->enc_part.enctype, &kt_entry)) != 0) {
+ BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
+ "krb5_kt_get_entry() fails with %x.\n", krb5rc);
+ kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
+ goto err;
+ }
+ if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
+ krb5ticket)) != 0) {
BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
- "krb5_rd_req() fails with %x.\n", krb5rc);
+ "krb5_decrypt_tkt_part() failed.\n");
kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
goto err;
}
+ else {
+ krb5_kt_free_entry(krb5context, &kt_entry);
+#ifdef KSSL_DEBUG
+ {
+ int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
+ printf("Decrypted ticket fields:\n");
+ printf("\tflags: %X, transit-type: %X",
+ krb5ticket->enc_part2->flags,
+ krb5ticket->enc_part2->transited.tr_type);
+ print_krb5_data("\ttransit-data: ",
+ &(krb5ticket->enc_part2->transited.tr_contents));
+ printf("\tcaddrs: %p, authdata: %p\n",
+ krb5ticket->enc_part2->caddrs,
+ krb5ticket->enc_part2->authorization_data);
+ if (paddr)
+ {
+ printf("\tcaddrs:\n");
+ for (i=0; paddr[i] != NULL; i++)
+ {
+ krb5_data d;
+ d.length=paddr[i]->length;
+ d.data=paddr[i]->contents;
+ print_krb5_data("\t\tIP: ", &d);
+ }
+ }
+ printf("\tstart/auth/end times: %d / %d / %d\n",
+ krb5ticket->enc_part2->times.starttime,
+ krb5ticket->enc_part2->times.authtime,
+ krb5ticket->enc_part2->times.endtime);
+ }
+#endif /* KSSL_DEBUG */
+ }
krb5rc = KRB5_NO_TKT_SUPPLIED;
if (!krb5ticket || !krb5ticket->enc_part2 ||
"bad ticket from krb5_rd_req.\n");
}
else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
- &krb5ticket->enc_part2->client->realm,
- krb5ticket->enc_part2->client->data))
+ &krb5ticket->enc_part2->client->realm,
+ krb5ticket->enc_part2->client->data,
+ krb5ticket->enc_part2->client->length))
{
kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
"kssl_ctx_setprinc() fails.\n");
kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
"kssl_ctx_setkey() fails.\n");
}
+ else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
+ {
+ krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
+ "invalid ticket from krb5_rd_req.\n");
+ }
else krb5rc = 0;
+ kssl_ctx->enctype = krb5ticket->enc_part.enctype;
+ ttimes->authtime = krb5ticket->enc_part2->times.authtime;
+ ttimes->starttime = krb5ticket->enc_part2->times.starttime;
+ ttimes->endtime = krb5ticket->enc_part2->times.endtime;
+ ttimes->renew_till = krb5ticket->enc_part2->times.renew_till;
+
err:
#ifdef KSSL_DEBUG
kssl_ctx_show(kssl_ctx);
#endif /* KSSL_DEBUG */
+ if (asn1ticket) KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
if (krb5ticket) krb5_free_ticket(krb5context, krb5ticket);
if (krb5server) krb5_free_principal(krb5context, krb5server);
{
if (kssl_ctx == NULL) return kssl_ctx;
- if (kssl_ctx->key) memset(kssl_ctx->key, 0, kssl_ctx->length);
+ if (kssl_ctx->key) OPENSSL_cleanse(kssl_ctx->key,
+ kssl_ctx->length);
if (kssl_ctx->key) free(kssl_ctx->key);
if (kssl_ctx->client_princ) free(kssl_ctx->client_princ);
if (kssl_ctx->service_host) free(kssl_ctx->service_host);
}
-/* Given a (krb5_data *) entity (and optional realm),
+/* Given an array of (krb5_data *) entity (and optional realm),
** set the plain (char *) client_princ or service_host member
** of the kssl_ctx struct.
*/
krb5_error_code
kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
- krb5_data *realm, krb5_data *entity)
+ krb5_data *realm, krb5_data *entity, int nentities)
{
char **princ;
int length;
+ int i;
if (kssl_ctx == NULL || entity == NULL) return KSSL_CTX_ERR;
}
if (*princ) free(*princ);
- length = entity->length + ((realm)? realm->length + 2: 1);
+ /* Add up all the entity->lengths */
+ length = 0;
+ for (i=0; i < nentities; i++)
+ {
+ length += entity[i].length;
+ }
+ /* Add in space for the '/' character(s) (if any) */
+ length += nentities-1;
+ /* Space for the ('@'+realm+NULL | NULL) */
+ length += ((realm)? realm->length + 2: 1);
+
if ((*princ = calloc(1, length)) == NULL)
return KSSL_CTX_ERR;
else
- {
- strncpy(*princ, entity->data, entity->length);
+ {
+ for (i = 0; i < nentities; i++)
+ {
+ strncat(*princ, entity[i].data, entity[i].length);
+ if (i < nentities-1)
+ {
+ strcat (*princ, "/");
+ }
+ }
if (realm)
{
strcat (*princ, "@");
krb5_error_code
kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
{
+ int length;
+ krb5_enctype enctype;
+ krb5_octet FAR *contents = NULL;
+
if (!kssl_ctx) return KSSL_CTX_ERR;
if (kssl_ctx->key)
{
- memset(kssl_ctx->key, 0, kssl_ctx->length);
+ OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
free(kssl_ctx->key);
}
if (session)
{
- kssl_ctx->enctype = session->enctype;
- kssl_ctx->length = session->length;
+
+#ifdef KRB5_HEIMDAL
+ length = session->keyvalue->length;
+ enctype = session->keytype;
+ contents = session->keyvalue->contents;
+#else
+ length = session->length;
+ enctype = session->enctype;
+ contents = session->contents;
+#endif
+ kssl_ctx->enctype = enctype;
+ kssl_ctx->length = length;
}
else
{
return KSSL_CTX_ERR;
}
else
- memcpy(kssl_ctx->key, session->contents, session->length);
+ memcpy(kssl_ctx->key, contents, length);
return KSSL_CTX_OK;
}
return;
}
else
- printf("%p\n", kssl_ctx);
+ printf("%p\n", (void *)kssl_ctx);
printf("\tservice:\t%s\n",
(kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
return;
}
+ int
+ kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
+{
+ krb5_context krb5context = NULL;
+ krb5_keytab krb5keytab = NULL;
+ krb5_keytab_entry entry;
+ krb5_principal princ = NULL;
+ krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
+ int rc = 0;
+
+ if ((krb5rc = krb5_init_context(&krb5context)))
+ return(0);
+
+ /* kssl_ctx->keytab_file == NULL ==> use Kerberos default
+ */
+ if (kssl_ctx->keytab_file)
+ {
+ krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
+ &krb5keytab);
+ if (krb5rc)
+ goto exit;
+ }
+ else
+ {
+ krb5rc = krb5_kt_default(krb5context,&krb5keytab);
+ if (krb5rc)
+ goto exit;
+ }
+
+ /* the host key we are looking for */
+ krb5rc = krb5_sname_to_principal(krb5context, NULL,
+ kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
+ KRB5_NT_SRV_HST, &princ);
+
+ krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
+ princ,
+ 0 /* IGNORE_VNO */,
+ 0 /* IGNORE_ENCTYPE */,
+ &entry);
+ if ( krb5rc == KRB5_KT_NOTFOUND ) {
+ rc = 1;
+ goto exit;
+ } else if ( krb5rc )
+ goto exit;
+
+ krb5_kt_free_entry(krb5context, &entry);
+ rc = 1;
+
+ exit:
+ if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
+ if (princ) krb5_free_principal(krb5context, princ);
+ if (krb5context) krb5_free_context(krb5context);
+ return(rc);
+}
+
+int
+kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
+ {
+ krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
+ krb5_context krb5context = NULL;
+ krb5_ccache krb5ccdef = NULL;
+ krb5_creds krb5creds, *krb5credsp = NULL;
+ int rc = 0;
+
+ memset((char *)&krb5creds, 0, sizeof(krb5creds));
+
+ if (!kssl_ctx)
+ return(0);
+
+ if (!kssl_ctx->service_host)
+ return(0);
+
+ if ((krb5rc = krb5_init_context(&krb5context)) != 0)
+ goto err;
+
+ if ((krb5rc = krb5_sname_to_principal(krb5context,
+ kssl_ctx->service_host,
+ (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
+ KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
+ goto err;
+
+ if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
+ goto err;
+
+ if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
+ &krb5creds.client)) != 0)
+ goto err;
+
+ if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
+ &krb5creds, &krb5credsp)) != 0)
+ goto err;
+
+ rc = 1;
+
+ err:
+#ifdef KSSL_DEBUG
+ kssl_ctx_show(kssl_ctx);
+#endif /* KSSL_DEBUG */
+
+ if (krb5creds.client) krb5_free_principal(krb5context, krb5creds.client);
+ if (krb5creds.server) krb5_free_principal(krb5context, krb5creds.server);
+ if (krb5context) krb5_free_context(krb5context);
+ return(rc);
+ }
+
+#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
{
#ifdef KRB5_HEIMDAL
data->length = 0;
- free(data->if (data->data) data);
+ if (data->data)
+ free(data->data);
+#elif defined(KRB5_MIT_OLD11)
+ if (data->data) {
+ krb5_xfree(data->data);
+ data->data = 0;
+ }
#else
krb5_free_data_contents(NULL, data);
#endif
}
+#endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
+
+
+/* Given pointers to KerberosTime and struct tm structs, convert the
+** KerberosTime string to struct tm. Note that KerberosTime is a
+** ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
+** seconds as defined in RFC 1510.
+** Return pointer to the (partially) filled in struct tm on success,
+** return NULL on failure.
+*/
+struct tm *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
+ {
+ char c, *p;
+
+ if (!k_tm) return NULL;
+ if (gtime == NULL || gtime->length < 14) return NULL;
+ if (gtime->data == NULL) return NULL;
+
+ p = (char *)>ime->data[14];
+
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_sec = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_min = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_hour = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_mday = atoi(p); *(p+2) = c;
+ c = *p; *p = '\0'; p -= 2; k_tm->tm_mon = atoi(p)-1; *(p+2) = c;
+ c = *p; *p = '\0'; p -= 4; k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
+
+ return k_tm;
+ }
+
+
+/* Helper function for kssl_validate_times().
+** We need context->clockskew, but krb5_context is an opaque struct.
+** So we try to sneek the clockskew out through the replay cache.
+** If that fails just return a likely default (300 seconds).
+*/
+krb5_deltat get_rc_clockskew(krb5_context context)
+ {
+ krb5_rcache rc;
+ krb5_deltat clockskew;
+
+ if (krb5_rc_default(context, &rc)) return KSSL_CLOCKSKEW;
+ if (krb5_rc_initialize(context, rc, 0)) return KSSL_CLOCKSKEW;
+ if (krb5_rc_get_lifespan(context, rc, &clockskew)) {
+ clockskew = KSSL_CLOCKSKEW;
+ }
+ (void) krb5_rc_destroy(context, rc);
+ return clockskew;
+ }
+
+
+/* kssl_validate_times() combines (and more importantly exposes)
+** the MIT KRB5 internal function krb5_validate_times() and the
+** in_clock_skew() macro. The authenticator client time is checked
+** to be within clockskew secs of the current time and the current
+** time is checked to be within the ticket start and expire times.
+** Either check may be omitted by supplying a NULL value.
+** Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
+** See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
+** 20010420 VRS
+*/
+krb5_error_code kssl_validate_times( krb5_timestamp atime,
+ krb5_ticket_times *ttimes)
+ {
+ krb5_deltat skew;
+ krb5_timestamp start, now;
+ krb5_error_code rc;
+ krb5_context context;
+
+ if ((rc = krb5_init_context(&context))) return SSL_R_KRB5_S_BAD_TICKET;
+ skew = get_rc_clockskew(context);
+ if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
+ krb5_free_context(context);
+
+ if (atime && labs(atime - now) >= skew) return SSL_R_KRB5_S_TKT_SKEW;
+
+ if (! ttimes) return 0;
+
+ start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
+ if (start - now > skew) return SSL_R_KRB5_S_TKT_NYV;
+ if ((now - ttimes->endtime) > skew) return SSL_R_KRB5_S_TKT_EXPIRED;
+
+#ifdef KSSL_DEBUG
+ printf("kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n",
+ start, atime, now, skew, ttimes->endtime);
+#endif /* KSSL_DEBUG */
+
+ return 0;
+ }
+
+
+/* Decode and decrypt given DER-encoded authenticator, then pass
+** authenticator ctime back in *atimep (or 0 if time unavailable).
+** Returns krb5_error_code and kssl_err on error. A NULL
+** authenticator (authentp->length == 0) is not considered an error.
+** Note that kssl_check_authent() makes use of the KRB5 session key;
+** you must call kssl_sget_tkt() to get the key before calling this routine.
+*/
+krb5_error_code kssl_check_authent(
+ /* IN */ KSSL_CTX *kssl_ctx,
+ /* IN */ krb5_data *authentp,
+ /* OUT */ krb5_timestamp *atimep,
+ /* OUT */ KSSL_ERR *kssl_err )
+ {
+ krb5_error_code krb5rc = 0;
+ KRB5_ENCDATA *dec_authent = NULL;
+ KRB5_AUTHENTBODY *auth = NULL;
+ krb5_enctype enctype;
+ EVP_CIPHER_CTX ciph_ctx;
+ const EVP_CIPHER *enc = NULL;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+ unsigned char *p, *unenc_authent;
+ int outl, unencbufsize;
+ struct tm tm_time, *tm_l, *tm_g;
+ time_t now, tl, tg, tr, tz_offset;
+
+ EVP_CIPHER_CTX_init(&ciph_ctx);
+ *atimep = 0;
+ kssl_err_set(kssl_err, 0, "");
+
+#ifndef KRB5CHECKAUTH
+ authentp = NULL;
+#else
+#if KRB5CHECKAUTH == 0
+ authentp = NULL;
+#endif
+#endif /* KRB5CHECKAUTH */
+
+ if (authentp == NULL || authentp->length == 0) return 0;
+
+#ifdef KSSL_DEBUG
+ {
+ unsigned int ui;
+ printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
+ p = authentp->data;
+ for (ui=0; ui < authentp->length; ui++) printf("%02x ",p[ui]);
+ printf("\n");
+ }
+#endif /* KSSL_DEBUG */
+
+ unencbufsize = 2 * authentp->length;
+ if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "Unable to allocate authenticator buffer.\n");
+ krb5rc = KRB5KRB_ERR_GENERIC;
+ goto err;
+ }
+
+ p = (unsigned char *)authentp->data;
+ if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
+ (long) authentp->length)) == NULL)
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "Error decoding authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+
+ enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
+#if !defined(KRB5_MIT_OLD11)
+ switch ( enctype ) {
+ case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
+ case ENCTYPE_DES3_CBC_SHA:
+ case ENCTYPE_DES3_CBC_RAW:
+ krb5rc = 0; /* Skip, can't handle derived keys */
+ goto err;
+ }
+#endif
+ enc = kssl_map_enc(enctype);
+ memset(iv, 0, sizeof iv); /* per RFC 1510 */
+
+ if (enc == NULL)
+ {
+ /* Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
+ ** This enctype indicates the authenticator was encrypted
+ ** using key-usage derived keys which openssl cannot decrypt.
+ */
+ goto err;
+ }
+
+ if (!EVP_CipherInit(&ciph_ctx,enc,kssl_ctx->key,iv,0))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "EVP_CipherInit error decrypting authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+ outl = dec_authent->cipher->length;
+ if (!EVP_Cipher(&ciph_ctx,unenc_authent,dec_authent->cipher->data,outl))
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "EVP_Cipher error decrypting authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+ EVP_CIPHER_CTX_cleanup(&ciph_ctx);
+
+#ifdef KSSL_DEBUG
+ printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
+ for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
+ printf("\n");
+#endif /* KSSL_DEBUG */
+
+ if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "confounded by authenticator.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+ outl -= p - unenc_authent;
+
+ if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
+ (long) outl))==NULL)
+ {
+ kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
+ "Error decoding authenticator body.\n");
+ krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ goto err;
+ }
+
+ memset(&tm_time,0,sizeof(struct tm));
+ if (k_gmtime(auth->ctime, &tm_time) &&
+ ((tr = mktime(&tm_time)) != (time_t)(-1)))
+ {
+ now = time(&now);
+ tm_l = localtime(&now); tl = mktime(tm_l);
+ tm_g = gmtime(&now); tg = mktime(tm_g);
+ tz_offset = tg - tl;
+
+ *atimep = tr - tz_offset;
+ }
+
+#ifdef KSSL_DEBUG
+ printf("kssl_check_authent: returns %d for client time ", *atimep);
+ if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
+ printf("%.*s\n", auth->ctime->length, auth->ctime->data);
+ else printf("NULL\n");
+#endif /* KSSL_DEBUG */
+
+ err:
+ if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
+ if (dec_authent) KRB5_ENCDATA_free(dec_authent);
+ if (unenc_authent) free(unenc_authent);
+ EVP_CIPHER_CTX_cleanup(&ciph_ctx);
+ return krb5rc;
+ }
+
+
+/* Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
+** because I dont't know how to stub varargs.
+** Returns krb5_error_code == ENOMEM on alloc error, otherwise
+** passes back newly constructed principal, which should be freed by caller.
+*/
+krb5_error_code kssl_build_principal_2(
+ /* UPDATE */ krb5_context context,
+ /* OUT */ krb5_principal *princ,
+ /* IN */ int rlen, const char *realm,
+ /* IN */ int slen, const char *svc,
+ /* IN */ int hlen, const char *host)
+ {
+ krb5_data *p_data = NULL;
+ krb5_principal new_p = NULL;
+ char *new_r = NULL;
+
+ if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL ||
+ (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
+ == NULL) goto err;
+ new_p->length = 2;
+ new_p->data = p_data;
+
+ if ((new_r = calloc(1, rlen + 1)) == NULL) goto err;
+ memcpy(new_r, realm, rlen);
+ krb5_princ_set_realm_length(context, new_p, rlen);
+ krb5_princ_set_realm_data(context, new_p, new_r);
+
+ if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) goto err;
+ memcpy(new_p->data[0].data, svc, slen);
+ new_p->data[0].length = slen;
+
+ if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) goto err;
+ memcpy(new_p->data[1].data, host, hlen);
+ new_p->data[1].length = hlen;
+
+ krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
+ *princ = new_p;
+ return 0;
+
+ err:
+ if (new_p && new_p[0].data) free(new_p[0].data);
+ if (new_p && new_p[1].data) free(new_p[1].data);
+ if (new_p) free(new_p);
+ if (new_r) free(new_r);
+ return ENOMEM;
+ }
+
-#else /* !NO_KRB5 */
+#else /* !OPENSSL_NO_KRB5 */
-#ifdef PEDANTIC
+#if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
static int dummy=(int)&dummy;
#endif
-#endif /* !NO_KRB5 */
+#endif /* !OPENSSL_NO_KRB5 */
projects / openssl.git / blobdiff