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Changes to the Kerberos SSL code by Jeffrey Altman <jaltman@columbia.edu>
[openssl.git] / ssl / kssl.c
diff --git a/ssl/kssl.c b/ssl/kssl.c
index 889061e3be65c5c9f6f6858ee13d890b2557888d..c086971c5d849c4b61455aacf9b1b3c089156b1d 100644 (file)
--- a/ssl/kssl.c
+++ b/ssl/kssl.c
@@ -120,9 +120,12 @@
 #define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
 #define krb5_timeofday           kssl_krb5_timeofday
 #define krb5_rc_default           kssl_krb5_rc_default
 #define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
 #define krb5_timeofday           kssl_krb5_timeofday
 #define krb5_rc_default           kssl_krb5_rc_default
-#define krb5_krb5_rc_initialize   kssl_krb5_rc_initialize
-#define krb5_krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
-#define krb5_krb5_rc_destroy      kssl_krb5_rc_destroy
+#define krb5_rc_initialize   kssl_krb5_rc_initialize
+#define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
+#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
 
 /* Prototypes for built in stubs */
 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
 
 /* Prototypes for built in stubs */
 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
@@ -140,16 +143,6 @@ krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
 
 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
                                          krb5_const_principal);
 
 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
                                          krb5_const_principal);
-krb5_error_code krb5_decrypt_tkt_part(krb5_context, krb5_const krb5_keyblock *,
-                                     krb5_ticket *);
-krb5_error_code krb5_timeofday(krb5_context context, krb5_int32 *timeret);
-krb5_error_code krb5_rc_default(krb5_context context, krb5_rcache *rc);
-krb5_error_code krb5_rc_initialize(krb5_context context, krb5_rcache rc,
-                                    krb5_deltat lifespan);
-krb5_error_code krb5_rc_get_lifespan(krb5_context context, krb5_rcache rc,
-                                    krb5_deltat *lifespan);
-krb5_error_code krb5_rc_destroy(krb5_context context, krb5_rcache rc);
-
 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
                                           krb5_auth_context  *,
                                           krb5_const krb5_flags,
 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
                                           krb5_auth_context  *,
                                           krb5_const krb5_flags,
@@ -175,6 +168,9 @@ krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
                                            krb5_ccache cache,
                                            krb5_principal *principal);
 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
                                            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 * );
 
 /* Function pointers (almost all Kerberos functions are _stdcall) */
 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
 
 /* Function pointers (almost all Kerberos functions are _stdcall) */
 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
@@ -214,6 +210,27 @@ static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
                         krb5_principal *principal)=NULL;
 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
                        (krb5_context, krb5_auth_context)=NULL;
                         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 int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 
 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
 static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 
 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
@@ -271,6 +288,12 @@ load_krb5_dll(void)
                GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
        (FARPROC) p_krb5_auth_con_init =
                GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
                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" );
        }
 
 /* Stubs for each function to be dynamicly loaded */
        }
 
 /* Stubs for each function to be dynamicly loaded */
@@ -463,7 +486,7 @@ krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
                load_krb5_dll();
 
        if ( p_krb5_principal_compare )
                load_krb5_dll();
 
        if ( p_krb5_principal_compare )
-               return(p_krb5_principal_compare(con,princ1,princ2);
+               return(p_krb5_principal_compare(con,princ1,princ2));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -476,7 +499,7 @@ krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
                load_krb5_dll();
 
        if ( p_krb5_decrypt_tkt_part )
                load_krb5_dll();
 
        if ( p_krb5_decrypt_tkt_part )
-               return(p_krb5_decrypt_tkt_part(con,keys,ticket);
+               return(p_krb5_decrypt_tkt_part(con,keys,ticket));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -488,7 +511,7 @@ krb5_timeofday(krb5_context con, krb5_int32 *timeret)
                load_krb5_dll();
 
        if ( p_krb5_timeofday )
                load_krb5_dll();
 
        if ( p_krb5_timeofday )
-               return(p_krb5_timeofday(con,timeret);
+               return(p_krb5_timeofday(con,timeret));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -500,7 +523,7 @@ krb5_rc_default(krb5_context con, krb5_rcache *rc)
                load_krb5_dll();
 
        if ( p_krb5_rc_default )
                load_krb5_dll();
 
        if ( p_krb5_rc_default )
-               return(p_krb5_rc_default(con,rc);
+               return(p_krb5_rc_default(con,rc));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -512,7 +535,7 @@ krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
                load_krb5_dll();
 
        if ( p_krb5_rc_initialize )
                load_krb5_dll();
 
        if ( p_krb5_rc_initialize )
-               return(p_krb5_rc_initialize(con, rc, lifespan);
+               return(p_krb5_rc_initialize(con, rc, lifespan));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -524,7 +547,7 @@ krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
                load_krb5_dll();
 
        if ( p_krb5_rc_get_lifespan )
                load_krb5_dll();
 
        if ( p_krb5_rc_get_lifespan )
-               return(p_krb5_rc_get_lifespan(con, rc, lifespanp);
+               return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
        else
                return KRB5KRB_ERR_GENERIC;
        }
        else
                return KRB5KRB_ERR_GENERIC;
        }
@@ -536,11 +559,47 @@ krb5_rc_destroy(krb5_context con, krb5_rcache rc)
                load_krb5_dll();
 
        if ( p_krb5_rc_destroy )
                load_krb5_dll();
 
        if ( p_krb5_rc_destroy )
-               return(p_krb5_rc_destroy(con, rc);
+               return(p_krb5_rc_destroy(con, rc));
        else
                return KRB5KRB_ERR_GENERIC;
        }
 
        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
 /* Structure definitions  */
 #ifndef NO_DEF_KRB5_CCACHE
 #ifndef krb5_x
@@ -562,36 +621,36 @@ typedef struct _krb5_cc_ops
        krb5_magic magic;
        char  *prefix;
        char  * (KRB5_CALLCONV *get_name)
        krb5_magic magic;
        char  *prefix;
        char  * (KRB5_CALLCONV *get_name)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
+               (krb5_context, krb5_ccache);
        krb5_error_code (KRB5_CALLCONV *resolve)
        krb5_error_code (KRB5_CALLCONV *resolve)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache  *, const char  *));
+               (krb5_context, krb5_ccache  *, const char  *);
        krb5_error_code (KRB5_CALLCONV *gen_new)
        krb5_error_code (KRB5_CALLCONV *gen_new)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache  *));
+               (krb5_context, krb5_ccache  *);
        krb5_error_code (KRB5_CALLCONV *init)
        krb5_error_code (KRB5_CALLCONV *init)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal));
+               (krb5_context, krb5_ccache, krb5_principal);
        krb5_error_code (KRB5_CALLCONV *destroy)
        krb5_error_code (KRB5_CALLCONV *destroy)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
+               (krb5_context, krb5_ccache);
        krb5_error_code (KRB5_CALLCONV *close)
        krb5_error_code (KRB5_CALLCONV *close)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
+               (krb5_context, krb5_ccache);
        krb5_error_code (KRB5_CALLCONV *store)
        krb5_error_code (KRB5_CALLCONV *store)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_creds  *));
+               (krb5_context, krb5_ccache, krb5_creds  *);
        krb5_error_code (KRB5_CALLCONV *retrieve)
        krb5_error_code (KRB5_CALLCONV *retrieve)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
-               krb5_flags, krb5_creds  *, krb5_creds  *));
+               (krb5_context, krb5_ccache,
+               krb5_flags, krb5_creds  *, krb5_creds  *);
        krb5_error_code (KRB5_CALLCONV *get_princ)
        krb5_error_code (KRB5_CALLCONV *get_princ)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal  *));
+               (krb5_context, krb5_ccache, krb5_principal  *);
        krb5_error_code (KRB5_CALLCONV *get_first)
        krb5_error_code (KRB5_CALLCONV *get_first)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor  *));
+               (krb5_context, krb5_ccache, krb5_cc_cursor  *);
        krb5_error_code (KRB5_CALLCONV *get_next)
        krb5_error_code (KRB5_CALLCONV *get_next)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
-               krb5_cc_cursor  *, krb5_creds  *));
+               (krb5_context, krb5_ccache,
+               krb5_cc_cursor  *, krb5_creds  *);
        krb5_error_code (KRB5_CALLCONV *end_get)
        krb5_error_code (KRB5_CALLCONV *end_get)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor  *));
+               (krb5_context, krb5_ccache, krb5_cc_cursor  *);
        krb5_error_code (KRB5_CALLCONV *remove_cred)
        krb5_error_code (KRB5_CALLCONV *remove_cred)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
-               krb5_flags, krb5_creds  *));
+               (krb5_context, krb5_ccache,
+               krb5_flags, krb5_creds  *);
        krb5_error_code (KRB5_CALLCONV *set_flags)
        krb5_error_code (KRB5_CALLCONV *set_flags)
-               KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_flags));
+               (krb5_context, krb5_ccache, krb5_flags);
        } krb5_cc_ops;
 #endif /* NO_DEF_KRB5_CCACHE */
 
        } krb5_cc_ops;
 #endif /* NO_DEF_KRB5_CCACHE */
 
@@ -697,23 +756,29 @@ int       kssl_test_confound(unsigned char *p)
 /*     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.
 /*     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.
 */
 int    *populate_cksumlens(void)
        {
 */
 int    *populate_cksumlens(void)
        {
-       int             i, j, n = krb5_max_cksum+1;
-       static int      *cklens = NULL;
+       int             i, j, n = 0x0010+1;
+       static size_t   *cklens = NULL;
 
 #ifdef KRB5CHECKAUTH
 
 #ifdef KRB5CHECKAUTH
-       if (!cklens && !(cklens = (int *) calloc(sizeof(int), n)))  return NULL;
+       if (!cklens && !(cklens = (size_t *) calloc(sizeof(int), n)))  return NULL;
 
 
-       for (i=0; i < krb5_max_cksum; i++)  {
-               if (!krb5_cksumarray[i])  continue;     /*  array has holes  */
-               for (j=0; j < krb5_max_cksum; j++)  {
+       for (i=0; i < n; i++)  {
+               if (!valid_cksumtype(i))  continue;     /*  array has holes  */
+               for (j=0; j < n; j++)  {
                        if (cklens[j] == 0)  {
                        if (cklens[j] == 0)  {
-                               cklens[j] = krb5_cksumarray[i]->checksum_length;
+                               cklens[j] = krb5_checksum_size(NULL,i);
                                break;          /*  krb5 elem was new: add   */
                                }
                                break;          /*  krb5 elem was new: add   */
                                }
-                       if (cklens[j] == krb5_cksumarray[i]->checksum_length)  {
+                       if (cklens[j] == krb5_checksum_size(NULL,i))  {
                                break;          /*  ignore duplicate elements */
                                }
                        }
                                break;          /*  ignore duplicate elements */
                                }
                        }
@@ -768,7 +833,7 @@ kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
 void
 print_krb5_data(char *label, krb5_data *kdata)
         {
 void
 print_krb5_data(char *label, krb5_data *kdata)
         {
-       int     i;
+       unsigned int    i;
 
        printf("%s[%d] ", label, kdata->length);
        for (i=0; i < kdata->length; i++)
 
        printf("%s[%d] ", label, kdata->length);
        for (i=0; i < kdata->length; i++)
@@ -813,7 +878,7 @@ print_krb5_authdata(char *label, krb5_authdata **adata)
 void
 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
         {
 void
 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
         {
-       int     i;
+       unsigned int    i;
 
        if (keyblk == NULL)
                 {
 
        if (keyblk == NULL)
                 {
@@ -845,17 +910,18 @@ print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
 void
 print_krb5_princ(char *label, krb5_principal_data *princ)
         {
 void
 print_krb5_princ(char *label, krb5_principal_data *princ)
         {
-       int     i, j;
+       unsigned int    ui, uj;
+        int i;
 
        printf("%s principal Realm: ", label);
        if (princ == NULL)  return;
 
        printf("%s principal Realm: ", label);
        if (princ == NULL)  return;
-       for (i=0; i < princ->realm.length; i++)  putchar(princ->realm.data[i]);
+       for (ui=0; ui < princ->realm.length; ui++)  putchar(princ->realm.data[ui]);
        printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
        for (i=0; i < princ->length; i++)
                 {
                printf("\t%d [%d]: ", i, princ->data[i].length);
        printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
        for (i=0; i < princ->length; i++)
                 {
                printf("\t%d [%d]: ", i, princ->data[i].length);
-               for (j=0; j < princ->data[i].length; j++)  {
-                       putchar(princ->data[i].data[j]);
+               for (uj=0; uj < princ->data[i].length; uj++)  {
+                       putchar(princ->data[i].data[uj]);
                        }
                printf("\n");
                }
                        }
                printf("\n");
                }
@@ -996,7 +1062,8 @@ kssl_cget_tkt(     /* UPDATE */    KSSL_CTX *kssl_ctx,
                        }
 
                if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
                        }
 
                if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
-               if (krb5_app_req.length)  krb5_xfree(krb5_app_req.data);
+               if (krb5_app_req.length)  
+                        krb5_free_data_contents(krb5context,&krb5_app_req);
                }
 #ifdef KRB5_HEIMDAL
        if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
                }
 #ifdef KRB5_HEIMDAL
        if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
@@ -1531,6 +1598,7 @@ kssl_ctx_show(KSSL_CTX *kssl_ctx)
        return;
         }
 
        return;
         }
 
+#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
        {
 #ifdef KRB5_HEIMDAL
 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
        {
 #ifdef KRB5_HEIMDAL
@@ -1545,7 +1613,7 @@ void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
        krb5_free_data_contents(NULL, data);
 #endif
        }
        krb5_free_data_contents(NULL, data);
 #endif
        }
-
+#endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
 
 /*  Helper function for kssl_validate_times().
 **  We need context->clockskew, but krb5_context is an opaque struct.
 
 /*  Helper function for kssl_validate_times().
 **  We need context->clockskew, but krb5_context is an opaque struct.
@@ -1631,6 +1699,7 @@ krb5_error_code  kssl_check_authent(
        int                     padl, outl, unencbufsize;
        struct tm               tm_time, *tm_l, *tm_g;
        time_t                  now, tl, tg, tz_offset;
        int                     padl, outl, unencbufsize;
        struct tm               tm_time, *tm_l, *tm_g;
        time_t                  now, tl, tg, tz_offset;
+        char * strptime();
 
        *atimep = 0;
        kssl_err_set(kssl_err, 0, "");
 
        *atimep = 0;
        kssl_err_set(kssl_err, 0, "");
@@ -1728,7 +1797,7 @@ krb5_error_code  kssl_check_authent(
                }
        else    strncpy(tbuf, auth->ctime->data, auth->ctime->length);
        
                }
        else    strncpy(tbuf, auth->ctime->data, auth->ctime->length);
        
-       if (strptime(tbuf, "%Y%m%d%H%M%S", &tm_time) != NULL)
+       if ((char *)strptime(tbuf, "%Y%m%d%H%M%S", &tm_time) != NULL)
                {
                now  = time(&now);
                tm_l = localtime(&now);         tl = mktime(tm_l);
                {
                now  = time(&now);
                tm_l = localtime(&now);         tl = mktime(tm_l);
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