X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/c529f79d594c53d3968d464c57ac24a21137dd09..8bbf3450a1ff0a3996dade29a4194cc0939d871f:/taint.c

diff --git a/taint.c b/taint.c
index 2a5fedc..2c2e66e 100644
--- 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
@@ -9,17 +19,30 @@
 #include "perl.h"
 
 void
-Perl_taint_proper(pTHX_ const char *f, char *s)
+Perl_taint_proper(pTHX_ const char *f, const char *s)
 {
-    dTHR;	/* just for taint */
     char *ug;
 
-#ifdef IV_IS_QUAD
-    DEBUG_u(PerlIO_printf(Perl_debug_log,
-            "%s %d %" PERL_PRId64 " %" PERL_PRId64 "\n", s, PL_tainted, (IV)PL_uid, (IV)PL_euid));
-#else
-    DEBUG_u(PerlIO_printf(Perl_debug_log,
-            "%s %d %lu %lu\n", s, PL_tainted, (unsigned long)PL_uid, (unsigned long)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) {
@@ -29,12 +52,17 @@ Perl_taint_proper(pTHX_ const char *f, char *s)
 	    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)
-	    Perl_croak(aTHX_ f, s, ug);
-	else if (ckWARN(WARN_TAINT))
-	    Perl_warner(aTHX_ 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);
+        }
     }
 }
 
@@ -52,8 +80,25 @@ Perl_taint_env(pTHX)
 	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
     {
@@ -67,12 +112,10 @@ Perl_taint_env(pTHX)
 	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}");
 	}
@@ -84,12 +127,10 @@ Perl_taint_env(pTHX)
     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}");
 	}
@@ -99,7 +140,6 @@ Perl_taint_env(pTHX)
     /* 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, n_a);
@@ -107,7 +147,7 @@ Perl_taint_env(pTHX)
 	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;
@@ -119,7 +159,6 @@ Perl_taint_env(pTHX)
     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);
 	}