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 | ||
26e623cf JH |
16 | #if defined(HAS_SETEUID) && defined(DEBUGGING) |
17 | # if Uid_t_size == 1 | |
18 | { | |
19 | UV uid = PL_uid; | |
20 | UV euid = PL_euid; | |
21 | ||
22 | DEBUG_u(PerlIO_printf(Perl_debug_log, | |
23 | "%s %d %"UVuf" %"UVuf"\n", | |
24 | s, PL_tainted, uid, euid)); | |
25 | } | |
26 | # else | |
27 | { | |
28 | IV uid = PL_uid; | |
29 | IV euid = PL_euid; | |
30 | ||
31 | DEBUG_u(PerlIO_printf(Perl_debug_log, | |
32 | "%s %d %"IVdf" %"IVdf"\n", | |
33 | s, PL_tainted, uid, euid)); | |
34 | } | |
35 | # endif | |
a52cb5f7 | 36 | #endif |
1e422769 | 37 | |
3280af22 | 38 | if (PL_tainted) { |
22c35a8c GS |
39 | if (!f) |
40 | f = PL_no_security; | |
3280af22 | 41 | if (PL_euid != PL_uid) |
bbce6d69 | 42 | ug = " while running setuid"; |
3280af22 | 43 | else if (PL_egid != PL_gid) |
bbce6d69 | 44 | ug = " while running setgid"; |
6537fe72 MS |
45 | else if (PL_taint_warn) |
46 | ug = " while running with -t switch"; | |
47 | else | |
bbce6d69 | 48 | ug = " while running with -T switch"; |
6537fe72 MS |
49 | if (PL_unsafe || PL_taint_warn) { |
50 | if(ckWARN(WARN_TAINT)) | |
51 | Perl_warner(aTHX_ WARN_TAINT, f, s, ug); | |
52 | } | |
53 | else { | |
54 | Perl_croak(aTHX_ f, s, ug); | |
55 | } | |
79072805 LW |
56 | } |
57 | } | |
58 | ||
59 | void | |
864dbfa3 | 60 | Perl_taint_env(pTHX) |
79072805 LW |
61 | { |
62 | SV** svp; | |
7bac28a0 | 63 | MAGIC* mg; |
64 | char** e; | |
65 | static char* misc_env[] = { | |
66 | "IFS", /* most shells' inter-field separators */ | |
c90c0ff4 | 67 | "CDPATH", /* ksh dain bramage #1 */ |
68 | "ENV", /* ksh dain bramage #2 */ | |
69 | "BASH_ENV", /* bash dain bramage -- I guess it's contagious */ | |
7bac28a0 | 70 | NULL |
71 | }; | |
1e422769 | 72 | |
142393a6 TM |
73 | if (!PL_envgv) |
74 | return; | |
75 | ||
1e422769 | 76 | #ifdef VMS |
82f1aded | 77 | { |
1e422769 | 78 | int i = 0; |
0dc443ab | 79 | char name[10 + TYPE_DIGITS(int)] = "DCL$PATH"; |
1e422769 | 80 | |
81 | while (1) { | |
82 | if (i) | |
83 | (void)sprintf(name,"DCL$PATH;%d", i); | |
6b88bc9c GS |
84 | svp = hv_fetch(GvHVn(PL_envgv), name, strlen(name), FALSE); |
85 | if (!svp || *svp == &PL_sv_undef) | |
1e422769 | 86 | break; |
87 | if (SvTAINTED(*svp)) { | |
88 | TAINT; | |
89 | taint_proper("Insecure %s%s", "$ENV{DCL$PATH}"); | |
90 | } | |
14befaf4 | 91 | if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) { |
1e422769 | 92 | TAINT; |
93 | taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}"); | |
94 | } | |
95 | i++; | |
96 | } | |
82f1aded | 97 | } |
1e422769 | 98 | #endif /* VMS */ |
79072805 | 99 | |
3280af22 | 100 | svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE); |
1e422769 | 101 | if (svp && *svp) { |
102 | if (SvTAINTED(*svp)) { | |
103 | TAINT; | |
bbce6d69 | 104 | taint_proper("Insecure %s%s", "$ENV{PATH}"); |
1e422769 | 105 | } |
14befaf4 | 106 | if ((mg = mg_find(*svp, PERL_MAGIC_envelem)) && MgTAINTEDDIR(mg)) { |
1e422769 | 107 | TAINT; |
108 | taint_proper("Insecure directory in %s%s", "$ENV{PATH}"); | |
109 | } | |
79072805 | 110 | } |
79072805 | 111 | |
c90c0ff4 | 112 | #ifndef VMS |
113 | /* tainted $TERM is okay if it contains no metachars */ | |
3280af22 | 114 | svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE); |
c90c0ff4 | 115 | if (svp && *svp && SvTAINTED(*svp)) { |
2d8e6c8d | 116 | STRLEN n_a; |
3280af22 | 117 | bool was_tainted = PL_tainted; |
2d8e6c8d GS |
118 | char *t = SvPV(*svp, n_a); |
119 | char *e = t + n_a; | |
3280af22 | 120 | PL_tainted = was_tainted; |
c90c0ff4 | 121 | if (t < e && isALNUM(*t)) |
122 | t++; | |
123 | while (t < e && (isALNUM(*t) || *t == '-' || *t == ':')) | |
124 | t++; | |
125 | if (t < e) { | |
126 | TAINT; | |
127 | taint_proper("Insecure $ENV{%s}%s", "TERM"); | |
128 | } | |
129 | } | |
130 | #endif /* !VMS */ | |
131 | ||
7bac28a0 | 132 | for (e = misc_env; *e; e++) { |
3280af22 NIS |
133 | svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE); |
134 | if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) { | |
7bac28a0 | 135 | TAINT; |
136 | taint_proper("Insecure $ENV{%s}%s", *e); | |
137 | } | |
bbce6d69 | 138 | } |
139 | } |