diff options
Diffstat (limited to 'contrib/tcpdump/print-radius.c')
| -rw-r--r-- | contrib/tcpdump/print-radius.c | 161 |
1 files changed, 94 insertions, 67 deletions
diff --git a/contrib/tcpdump/print-radius.c b/contrib/tcpdump/print-radius.c index 0f8eaf5a076f..203c50bd06ab 100644 --- a/contrib/tcpdump/print-radius.c +++ b/contrib/tcpdump/print-radius.c @@ -44,7 +44,7 @@ #ifndef lint static const char rcsid[] _U_ = - "$Id: print-radius.c,v 1.27 2004/07/21 21:45:47 guy Exp $"; + "$Id: print-radius.c,v 1.27.2.1 2005/09/26 01:02:40 guy Exp $"; #endif #ifdef HAVE_CONFIG_H @@ -454,9 +454,15 @@ print_attr_string(register u_char *data, u_int length, u_short attr_code ) switch(attr_code) { case TUNNEL_PASS: + if (length < 3) + { + printf(" [|radius]"); + return; + } if (*data && (*data <=0x1F) ) printf("Tag %u, ",*data); data++; + length--; printf("Salt %u ",EXTRACT_16BITS(data) ); data+=2; length-=2; @@ -469,6 +475,11 @@ print_attr_string(register u_char *data, u_int length, u_short attr_code ) case TUNNEL_SERVER_AUTH: if (*data <= 0x1F) { + if (length < 1) + { + printf(" [|radius]"); + return; + } printf("Tag %u",*data); data++; length--; @@ -482,7 +493,7 @@ print_attr_string(register u_char *data, u_int length, u_short attr_code ) return; trunc: - printf("|radius"); + printf(" [|radius]"); } /* @@ -497,7 +508,9 @@ print_vendor_attr(register u_char *data, u_int length, u_short attr_code _U_) u_int vendor_type; u_int vendor_length; - /* FIXME: all sort of boundary checks */ + if (length < 4) + goto trunc; + TCHECK2(*data, 4); vendor_id = EXTRACT_32BITS(data); data+=4; length-=4; @@ -507,15 +520,29 @@ print_vendor_attr(register u_char *data, u_int length, u_short attr_code _U_) vendor_id); while (length >= 2) { - if(!TTEST2(*data, 2)) - return; + TCHECK2(*data, 2); vendor_type = *(data); vendor_length = *(data+1); + if (vendor_length < 2) + { + printf("\n\t Vendor Attribute: %u, Length: %u (bogus, must be >= 2)", + vendor_type, + vendor_length); + return; + } + if (vendor_length > length) + { + printf("\n\t Vendor Attribute: %u, Length: %u (bogus, goes past end of vendor-specific attribute)", + vendor_type, + vendor_length); + return; + } data+=2; - if(!TTEST2(*data, vendor_length)) - return; + vendor_length-=2; + length-=2; + TCHECK2(*data, vendor_length); printf("\n\t Vendor Attribute: %u, Length: %u, Value: ", vendor_type, @@ -524,6 +551,10 @@ print_vendor_attr(register u_char *data, u_int length, u_short attr_code _U_) printf("%c",(*data < 32 || *data > 128) ? '.' : *data ); length-=vendor_length; } + return; + + trunc: + printf(" [|radius]"); } @@ -640,7 +671,7 @@ print_attr_num(register u_char *data, u_int length, u_short attr_code ) return; trunc: - printf("|radius}"); + printf(" [|radius]"); } @@ -683,7 +714,7 @@ print_attr_address(register u_char *data, u_int length, u_short attr_code ) return; trunc: - printf("|radius"); + printf(" [|radius]"); } @@ -716,7 +747,7 @@ static void print_attr_time(register u_char *data, u_int length, u_short attr_co return; trunc: - printf("|radius"); + printf(" [|radius]"); } @@ -774,8 +805,8 @@ static void print_attr_strange(register u_char *data, u_int length, u_short attr len_data = 4; PRINT_HEX(len_data, data); printf(", Current Time: "); - len_data = 4; TCHECK2(data[0],4); + len_data = 4; PRINT_HEX(len_data, data); break; @@ -790,63 +821,72 @@ static void print_attr_strange(register u_char *data, u_int length, u_short attr PRINT_HEX(len_data, data); break; } + return; trunc: - printf("|radius}"); + printf(" [|radius]"); } static void -radius_attr_print(register const u_char *attr, u_int length) +radius_attrs_print(register const u_char *attr, u_int length) { register const struct radius_attr *rad_attr = (struct radius_attr *)attr; - - if (length < 3) - { - printf(" [|radius]"); - return; - } + const char *attr_string; while (length > 0) { - if (rad_attr->len == 0 && rad_attr->type < (TAM_SIZE(attr_type)-1)) + if (length < 2) + goto trunc; + TCHECK(*rad_attr); + + if (rad_attr->type > 0 && rad_attr->type < TAM_SIZE(attr_type)) + attr_string = attr_type[rad_attr->type].name; + else + attr_string = "Unknown"; + if (rad_attr->len < 2) { - printf("\n\t %s Attribute (%u), zero-length", - attr_type[rad_attr->type].name, - rad_attr->type); + printf("\n\t %s Attribute (%u), length: %u (bogus, must be >= 2)", + attr_string, + rad_attr->type, + rad_attr->len); return; } - if ( rad_attr->len <= length && rad_attr->type < (TAM_SIZE(attr_type)-1)) + if (rad_attr->len > length) { - printf("\n\t %s Attribute (%u), length: %u, Value: ", - attr_type[rad_attr->type].name, - rad_attr->type, - rad_attr->len); + printf("\n\t %s Attribute (%u), length: %u (bogus, goes past end of packet)", + attr_string, + rad_attr->type, + rad_attr->len); + return; + } + printf("\n\t %s Attribute (%u), length: %u, Value: ", + attr_string, + rad_attr->type, + rad_attr->len); - if ( !rad_attr->type || (rad_attr->type > (TAM_SIZE(attr_type)-1)) ) { - } - else { - if (rad_attr->len > 2) - { - if ( attr_type[rad_attr->type].print_func ) - (*attr_type[rad_attr->type].print_func)( - ((u_char *)(rad_attr+1)), - rad_attr->len - 2, rad_attr->type); - } + if (rad_attr->type < TAM_SIZE(attr_type)) + { + if (rad_attr->len > 2) + { + if ( attr_type[rad_attr->type].print_func ) + (*attr_type[rad_attr->type].print_func)( + ((u_char *)(rad_attr+1)), + rad_attr->len - 2, rad_attr->type); } } - else { - printf(" [|radius]"); - return; - } /* do we also want to see a hex dump ? */ - if (vflag> 1 && rad_attr->len >= 2) + if (vflag> 1) print_unknown_data((u_char *)rad_attr+2,"\n\t ",(rad_attr->len)-2); length-=(rad_attr->len); rad_attr = (struct radius_attr *)( ((char *)(rad_attr))+rad_attr->len); } + return; + +trunc: + printf(" [|radius]"); } @@ -854,24 +894,9 @@ void radius_print(const u_char *dat, u_int length) { register const struct radius_hdr *rad; - register u_int i; u_int len, auth_idx; - if (snapend < dat) - { - printf(" [|radius]"); - return; - } - i = snapend - dat; - if (i > length) - i = length; - - if (i < MIN_RADIUS_LEN) - { - printf(" [|radius]"); - return; - } - + TCHECK2(*dat, MIN_RADIUS_LEN); rad = (struct radius_hdr *)dat; len = EXTRACT_16BITS(&rad->len); @@ -881,22 +906,20 @@ radius_print(const u_char *dat, u_int length) return; } - if (len < i) - i = len; - - i -= MIN_RADIUS_LEN; + if (len > length) + len = length; if (vflag < 1) { printf("RADIUS, %s (%u), id: 0x%02x length: %u", tok2str(radius_command_values,"Unknown Command",rad->code), rad->code, rad->id, - length); + len); return; } else { printf("RADIUS, length: %u\n\t%s (%u), id: 0x%02x, Authenticator: ", - length, + len, tok2str(radius_command_values,"Unknown Command",rad->code), rad->code, rad->id); @@ -905,6 +928,10 @@ radius_print(const u_char *dat, u_int length) printf("%02x", rad->auth[auth_idx] ); } - if (i) - radius_attr_print( dat + MIN_RADIUS_LEN, i); + if (len > MIN_RADIUS_LEN) + radius_attrs_print( dat + MIN_RADIUS_LEN, len - MIN_RADIUS_LEN); + return; + +trunc: + printf(" [|radius]"); } |