Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* |
2 | * "...we will have peace, when you and all your works have perished--and | |
3 | * the works of your dark master to whom you would deliver us. You are a | |
4 | * liar, Saruman, and a corrupter of men's hearts." --Theoden | |
5 | */ | |
6 | ||
463ee0b2 | 7 | #include "EXTERN.h" |
864dbfa3 | 8 | #define PERL_IN_TAINT_C |
463ee0b2 LW |
9 | #include "perl.h" |
10 | ||
11 | void | |
dff6d3cd | 12 | Perl_taint_proper(pTHX_ const char *f, const char *s) |
79072805 | 13 | { |
bbce6d69 | 14 | char *ug; |
15 | ||
a52cb5f7 | 16 | #ifdef HAS_SETEUID |
fb73857a | 17 | DEBUG_u(PerlIO_printf(Perl_debug_log, |
785fb66b | 18 | "%s %d %"Uid_t_f" %"Uid_t_f"\n", s, PL_tainted, PL_uid, PL_euid)); |
a52cb5f7 | 19 | #endif |
1e422769 | 20 | |
3280af22 | 21 | if (PL_tainted) { |
22c35a8c GS |
22 | if (!f) |
23 | f = PL_no_security; | |
3280af22 | 24 | if (PL_euid != PL_uid) |
bbce6d69 | 25 | ug = " while running setuid"; |
3280af22 | 26 | else if (PL_egid != PL_gid) |
bbce6d69 | 27 | ug = " while running setgid"; |
28 | else | |
29 | ug = " while running with -T switch"; | |
3280af22 | 30 | if (!PL_unsafe) |
cea2e8a9 | 31 | Perl_croak(aTHX_ f, s, ug); |
599cee73 | 32 | else if (ckWARN(WARN_TAINT)) |
cea2e8a9 | 33 | Perl_warner(aTHX_ WARN_TAINT, f, s, ug); |
79072805 LW |
34 | } |
35 | } | |
36 | ||
37 | void | |
864dbfa3 | 38 | Perl_taint_env(pTHX) |
79072805 LW |
39 | { |
40 | SV** svp; | |
7bac28a0 | 41 | MAGIC* mg; |
42 | char** e; | |
43 | static char* misc_env[] = { | |
44 | "IFS", /* most shells' inter-field separators */ | |
c90c0ff4 | 45 | "CDPATH", /* ksh dain bramage #1 */ |
46 | "ENV", /* ksh dain bramage #2 */ | |
47 | "BASH_ENV", /* bash dain bramage -- I guess it's contagious */ | |
7bac28a0 | 48 | NULL |
49 | }; | |
1e422769 | 50 | |
142393a6 TM |
51 | if (!PL_envgv) |
52 | return; | |
53 | ||
1e422769 | 54 | #ifdef VMS |
82f1aded | 55 | { |
1e422769 | 56 | int i = 0; |
0dc443ab | 57 | char name[10 + TYPE_DIGITS(int)] = "DCL$PATH"; |
1e422769 | 58 | |
59 | while (1) { | |
60 | if (i) | |
61 | (void)sprintf(name,"DCL$PATH;%d", i); | |
6b88bc9c GS |
62 | svp = hv_fetch(GvHVn(PL_envgv), name, strlen(name), FALSE); |
63 | if (!svp || *svp == &PL_sv_undef) | |
1e422769 | 64 | break; |
65 | if (SvTAINTED(*svp)) { | |
66 | TAINT; | |
67 | taint_proper("Insecure %s%s", "$ENV{DCL$PATH}"); | |
68 | } | |
14befaf4 | 69 | if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) { |
1e422769 | 70 | TAINT; |
71 | taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}"); | |
72 | } | |
73 | i++; | |
74 | } | |
82f1aded | 75 | } |
1e422769 | 76 | #endif /* VMS */ |
79072805 | 77 | |
3280af22 | 78 | svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE); |
1e422769 | 79 | if (svp && *svp) { |
80 | if (SvTAINTED(*svp)) { | |
81 | TAINT; | |
bbce6d69 | 82 | taint_proper("Insecure %s%s", "$ENV{PATH}"); |
1e422769 | 83 | } |
14befaf4 | 84 | if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) { |
1e422769 | 85 | TAINT; |
86 | taint_proper("Insecure directory in %s%s", "$ENV{PATH}"); | |
87 | } | |
79072805 | 88 | } |
79072805 | 89 | |
c90c0ff4 | 90 | #ifndef VMS |
91 | /* tainted $TERM is okay if it contains no metachars */ | |
3280af22 | 92 | svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE); |
c90c0ff4 | 93 | if (svp && *svp && SvTAINTED(*svp)) { |
2d8e6c8d | 94 | STRLEN n_a; |
3280af22 | 95 | bool was_tainted = PL_tainted; |
2d8e6c8d GS |
96 | char *t = SvPV(*svp, n_a); |
97 | char *e = t + n_a; | |
3280af22 | 98 | PL_tainted = was_tainted; |
c90c0ff4 | 99 | if (t < e && isALNUM(*t)) |
100 | t++; | |
101 | while (t < e && (isALNUM(*t) || *t == '-' || *t == ':')) | |
102 | t++; | |
103 | if (t < e) { | |
104 | TAINT; | |
105 | taint_proper("Insecure $ENV{%s}%s", "TERM"); | |
106 | } | |
107 | } | |
108 | #endif /* !VMS */ | |
109 | ||
7bac28a0 | 110 | for (e = misc_env; *e; e++) { |
3280af22 NIS |
111 | svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE); |
112 | if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) { | |
7bac28a0 | 113 | TAINT; |
114 | taint_proper("Insecure $ENV{%s}%s", *e); | |
115 | } | |
bbce6d69 | 116 | } |
117 | } |