CXUX_BROKEN_CONSTANT_CONVERT isn't used anymore.

[perl5.git] / taint.c

diff --git a/taint.c b/taint.c
index 05a1a44..2c2e66e 100644 (file)
--- a/taint.c
+++ b/taint.c
@@ -1,3 +1,13 @@
+/*    taint.c
+ *
+ *    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ *    2000, 2001, 2002, by Larry Wall and others
+ *
+ *    You may distribute under the terms of either the GNU General Public
+ *    License or the Artistic License, as specified in the README file.
+ *
+ */
+
 /*
  * "...we will have peace, when you and all your works have perished--and
  * the works of your dark master to whom you would deliver us.  You are a
@@ -5,33 +15,59 @@
  */
 
 #include "EXTERN.h"
+#define PERL_IN_TAINT_C
 #include "perl.h"
 
 void
-taint_proper(const char *f, char *s)
+Perl_taint_proper(pTHX_ const char *f, const char *s)
 {
-    dTHR;      /* just for taint */
     char *ug;
 
-    DEBUG_u(PerlIO_printf(Perl_debug_log,
-            "%s %d %d %d\n", s, PL_tainted, PL_uid, PL_euid));
+#if defined(HAS_SETEUID) && defined(DEBUGGING)
+#   if Uid_t_size == 1
+    {
+        UV  uid = PL_uid;
+        UV euid = PL_euid;
+
+        DEBUG_u(PerlIO_printf(Perl_debug_log,
+                              "%s %d %"UVuf" %"UVuf"\n",
+                              s, PL_tainted, uid, euid));
+    }
+#   else
+    {
+        IV  uid = PL_uid;
+        IV euid = PL_euid;
+
+        DEBUG_u(PerlIO_printf(Perl_debug_log,
+                              "%s %d %"IVdf" %"IVdf"\n",
+                              s, PL_tainted, uid, euid));
+    }
+#   endif
+#endif
 
     if (PL_tainted) {
+       if (!f)
+           f = PL_no_security;
        if (PL_euid != PL_uid)
            ug = " while running setuid";
        else if (PL_egid != PL_gid)
            ug = " while running setgid";
-       else
+       else if (PL_taint_warn)
+            ug = " while running with -t switch";
+        else
            ug = " while running with -T switch";
-       if (!PL_unsafe)
-           croak(f, s, ug);
-       else if (ckWARN(WARN_TAINT))
-           warner(WARN_TAINT, f, s, ug);
+       if (PL_unsafe || PL_taint_warn) {
+            if(ckWARN(WARN_TAINT))
+                Perl_warner(aTHX_ packWARN(WARN_TAINT), f, s, ug);
+        }
+        else {
+            Perl_croak(aTHX_ f, s, ug);
+        }
     }
 }
 
 void
-taint_env(void)
+Perl_taint_env(pTHX)
 {
     SV** svp;
     MAGIC* mg;
@@ -44,7 +80,28 @@ taint_env(void)
        NULL
     };
 
+    /* Don't bother if there's no *ENV glob */
+    if (!PL_envgv)
+       return;
+    /* If there's no %ENV hash of if it's not magical, croak, because
+     * it probably doesn't reflect the actual environment */
+    if (!GvHV(PL_envgv) || !(SvRMAGICAL(GvHV(PL_envgv))
+           && mg_find((SV*)GvHV(PL_envgv), PERL_MAGIC_env))) {
+       bool was_tainted = PL_tainted;
+       char *name = GvENAME(PL_envgv);
+       PL_tainted = TRUE;
+       if (strEQ(name,"ENV"))
+           /* hash alias */
+           taint_proper("%%ENV is aliased to %s%s", "another variable");
+       else
+           /* glob alias: report it in the error message */
+           taint_proper("%%ENV is aliased to %%%s%s", name);
+       /* this statement is reached under -t or -U */
+       PL_tainted = was_tainted;
+    }
+
 #ifdef VMS
+    {
     int i = 0;
     char name[10 + TYPE_DIGITS(int)] = "DCL$PATH";
 
@@ -55,28 +112,25 @@ taint_env(void)
        if (!svp || *svp == &PL_sv_undef)
            break;
        if (SvTAINTED(*svp)) {
-           dTHR;
            TAINT;
            taint_proper("Insecure %s%s", "$ENV{DCL$PATH}");
        }
-       if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) {
-           dTHR;
+       if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) {
            TAINT;
            taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}");
        }
        i++;
     }
+  }
 #endif /* VMS */
 
     svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE);
     if (svp && *svp) {
        if (SvTAINTED(*svp)) {
-           dTHR;
            TAINT;
            taint_proper("Insecure %s%s", "$ENV{PATH}");
        }
-       if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) {
-           dTHR;
+       if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) {
            TAINT;
            taint_proper("Insecure directory in %s%s", "$ENV{PATH}");
        }
@@ -86,14 +140,14 @@ taint_env(void)
     /* tainted $TERM is okay if it contains no metachars */
     svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE);
     if (svp && *svp && SvTAINTED(*svp)) {
-       dTHR;   /* just for taint */
+       STRLEN n_a;
        bool was_tainted = PL_tainted;
-       char *t = SvPV(*svp, PL_na);
-       char *e = t + PL_na;
+       char *t = SvPV(*svp, n_a);
+       char *e = t + n_a;
        PL_tainted = was_tainted;
        if (t < e && isALNUM(*t))
            t++;
-       while (t < e && (isALNUM(*t) || *t == '-' || *t == ':'))
+       while (t < e && (isALNUM(*t) || strchr("-_.+", *t)))
            t++;
        if (t < e) {
            TAINT;
@@ -105,7 +159,6 @@ taint_env(void)
     for (e = misc_env; *e; e++) {
        svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE);
        if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) {
-           dTHR;       /* just for taint */
            TAINT;
            taint_proper("Insecure $ENV{%s}%s", *e);
        }