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Code Issues Releases Wiki Activity

Ensure base64/base32/hex fields in DNS records that should be non-empty are.

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This commit is contained in:
Mark Andrews
2019-01-04 15:20:04 +11:00
parent 5114270fa7
commit 5e8b772ad1
26 changed files with 135 additions and 70 deletions
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3
CHANGES
View File

@@ -1,3 +1,6 @@
5126. [bug] Named incorrectly accepted empty base64 and hex encoded
fields when reading master files. [GL #807]
5125. [bug] Allow for up to 100 records or 64k of data when caching
a negative response. [GL #804]

7
bin/tests/system/checkzone/tests.sh
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@@ -36,15 +36,16 @@ done
for db in zones/bad*.db
do
echo_i "checking $db ($n)"
ret=0
ret=0 v=0
case $db in
zones/bad-dns-sd-reverse.db)
$CHECKZONE -k fail -i local 0.0.0.0.in-addr.arpa $db > test.out.$n 2>&1 && ret=1
$CHECKZONE -k fail -i local 0.0.0.0.in-addr.arpa $db > test.out.$n 2>&1 || v=$?
;;
*)
$CHECKZONE -i local example $db > test.out.$n 2>&1 && ret=1
$CHECKZONE -i local example $db > test.out.$n 2>&1 || v=$?
;;
esac
test $v = 1 || ret=1
n=`expr $n + 1`
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`

2
bin/tests/system/checkzone/zones/bad-dhcid.db Normal file
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@@ -0,0 +1,2 @@
@ 3600 DHCID
@ 3600 DHCID

2
bin/tests/system/checkzone/zones/bad-eid.db Normal file
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@@ -0,0 +1,2 @@
@ EID
@ EID

2
bin/tests/system/checkzone/zones/bad-nimloc.db Normal file
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@@ -0,0 +1,2 @@
@ 3600 NIMLOC
@ 3600 NIMLOC

2
bin/tests/system/checkzone/zones/crashzone.db
View File

@@ -14,7 +14,7 @@ dyn.example.net. 7200 IN SOA ns1.example.net. hostmaster.example.net. (
1209600 ; expire (2 weeks)
7200 ; minimum (2 hours)
)
7200 RRSIG SOA 7 3 7200 2010 20100225214229 30323 dyn.example.net.
7200 RRSIG SOA 7 3 7200 2010 20100225214229 30323 dyn.example.net. MuyI
7200 NS ns1.example.net.
7200 NS ns2.example.net.
3600 RRSIG DNSKEY 7 3 3600 20100227180048 (

17
lib/dns/rdata.c
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@@ -868,13 +868,16 @@ unknown_fromtext(dns_rdataclass_t rdclass, dns_rdatatype_t type,
if (result != ISC_R_SUCCESS)
return (result);
result = isc_hex_tobuffer(lexer, buf,
(unsigned int)token.value.as_ulong);
if (result != ISC_R_SUCCESS)
goto failure;
if (isc_buffer_usedlength(buf) != token.value.as_ulong) {
result = ISC_R_UNEXPECTEDEND;
goto failure;
if (token.value.as_ulong != 0U) {
result = isc_hex_tobuffer(lexer, buf,
(unsigned int)token.value.as_ulong);
if (result != ISC_R_SUCCESS) {
goto failure;
}
if (isc_buffer_usedlength(buf) != token.value.as_ulong) {
result = ISC_R_UNEXPECTEDEND;
goto failure;
}
}
if (dns_rdatatype_isknown(type)) {

2
lib/dns/rdata/generic/cert_37.c
View File

@@ -55,7 +55,7 @@ fromtext_cert(ARGS_FROMTEXT) {
RETTOK(dns_secalg_fromtext(&secalg, &token.value.as_textregion));
RETERR(mem_tobuffer(target, &secalg, 1));
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/ds_43.c
View File

@@ -74,7 +74,7 @@ generic_fromtext_ds(ARGS_FROMTEXT) {
length = ISC_SHA384_DIGESTLENGTH;
break;
default:
length = -1;
length = -2;
break;
}
return (isc_hex_tobuffer(lexer, target, length));

2
lib/dns/rdata/generic/ipseckey_45.c
View File

@@ -108,7 +108,7 @@ fromtext_ipseckey(ARGS_FROMTEXT) {
/*
* Public key.
*/
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

7
lib/dns/rdata/generic/key_25.c
View File

@@ -21,7 +21,6 @@
static inline isc_result_t
generic_fromtext_key(ARGS_FROMTEXT) {
isc_result_t result;
isc_token_t token;
dns_secalg_t alg;
dns_secproto_t proto;
@@ -55,11 +54,7 @@ generic_fromtext_key(ARGS_FROMTEXT) {
if ((flags & 0xc000) == 0xc000)
return (ISC_R_SUCCESS);
result = isc_base64_tobuffer(lexer, target, -1);
if (result != ISC_R_SUCCESS)
return (result);
return (ISC_R_SUCCESS);
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

7
lib/dns/rdata/generic/keydata_65533.c
View File

@@ -21,7 +21,6 @@
static inline isc_result_t
fromtext_keydata(ARGS_FROMTEXT) {
isc_result_t result;
isc_token_t token;
dns_secalg_t alg;
dns_secproto_t proto;
@@ -76,11 +75,7 @@ fromtext_keydata(ARGS_FROMTEXT) {
if ((flags & 0xc000) == 0xc000)
return (ISC_R_SUCCESS);
result = isc_base64_tobuffer(lexer, target, -1);
if (result != ISC_R_SUCCESS)
return (result);
return (ISC_R_SUCCESS);
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/openpgpkey_61.c
View File

@@ -28,7 +28,7 @@ fromtext_openpgpkey(ARGS_FROMTEXT) {
/*
* Keyring.
*/
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/rrsig_46.c
View File

@@ -140,7 +140,7 @@ fromtext_rrsig(ARGS_FROMTEXT) {
/*
* Sig.
*/
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/sig_24.c
View File

@@ -112,7 +112,7 @@ fromtext_sig(ARGS_FROMTEXT) {
/*
* Sig.
*/
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/sshfp_44.c
View File

@@ -50,7 +50,7 @@ fromtext_sshfp(ARGS_FROMTEXT) {
/*
* Digest.
*/
return (isc_hex_tobuffer(lexer, target, -1));
return (isc_hex_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/generic/tlsa_52.c
View File

@@ -56,7 +56,7 @@ generic_fromtext_tlsa(ARGS_FROMTEXT) {
/*
* Certificate Association Data.
*/
return (isc_hex_tobuffer(lexer, target, -1));
return (isc_hex_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/in_1/dhcid_49.c
View File

@@ -29,7 +29,7 @@ fromtext_in_dhcid(ARGS_FROMTEXT) {
UNUSED(options);
UNUSED(callbacks);
return (isc_base64_tobuffer(lexer, target, -1));
return (isc_base64_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/in_1/eid_31.c
View File

@@ -28,7 +28,7 @@ fromtext_in_eid(ARGS_FROMTEXT) {
UNUSED(rdclass);
UNUSED(callbacks);
return (isc_hex_tobuffer(lexer, target, -1));
return (isc_hex_tobuffer(lexer, target, -2));
}
static inline isc_result_t

2
lib/dns/rdata/in_1/nimloc_32.c
View File

@@ -28,7 +28,7 @@ fromtext_in_nimloc(ARGS_FROMTEXT) {
UNUSED(rdclass);
UNUSED(callbacks);
return (isc_hex_tobuffer(lexer, target, -1));
return (isc_hex_tobuffer(lexer, target, -2));
}
static inline isc_result_t

22
lib/isc/base32.c
View File

@@ -282,31 +282,43 @@ static isc_result_t
base32_tobuffer(isc_lex_t *lexer, const char base[], bool pad,
isc_buffer_t *target, int length)
{
unsigned int before, after;
base32_decode_ctx_t ctx;
isc_textregion_t *tr;
isc_token_t token;
bool eol;
REQUIRE(length >= -2);
base32_decode_init(&ctx, length, base, pad, target);
before = isc_buffer_usedlength(target);
while (!ctx.seen_end && (ctx.length != 0)) {
unsigned int i;
if (length > 0)
if (length > 0) {
eol = false;
else
} else {
eol = true;
}
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string, eol));
if (token.type != isc_tokentype_string)
if (token.type != isc_tokentype_string) {
break;
}
tr = &token.value.as_textregion;
for (i = 0; i < tr->length; i++)
for (i = 0; i < tr->length; i++) {
RETERR(base32_decode_char(&ctx, tr->base[i]));
}
}
if (ctx.length < 0 && !ctx.seen_end)
after = isc_buffer_usedlength(target);
if (ctx.length < 0 && !ctx.seen_end) {
isc_lex_ungettoken(lexer, &token);
}
RETERR(base32_decode_finish(&ctx));
if (length == -2 && before == after) {
return (ISC_R_UNEXPECTEDEND);
}
return (ISC_R_SUCCESS);
}

22
lib/isc/base64.c
View File

@@ -173,31 +173,43 @@ base64_decode_finish(base64_decode_ctx_t *ctx) {
isc_result_t
isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length) {
unsigned int before, after;
base64_decode_ctx_t ctx;
isc_textregion_t *tr;
isc_token_t token;
bool eol;
REQUIRE(length >= -2);
base64_decode_init(&ctx, length, target);
before = isc_buffer_usedlength(target);
while (!ctx.seen_end && (ctx.length != 0)) {
unsigned int i;
if (length > 0)
if (length > 0) {
eol = false;
else
} else {
eol = true;
}
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string, eol));
if (token.type != isc_tokentype_string)
if (token.type != isc_tokentype_string) {
break;
}
tr = &token.value.as_textregion;
for (i = 0; i < tr->length; i++)
for (i = 0; i < tr->length; i++) {
RETERR(base64_decode_char(&ctx, tr->base[i]));
}
}
if (ctx.length < 0 && !ctx.seen_end)
after = isc_buffer_usedlength(target);
if (ctx.length < 0 && !ctx.seen_end) {
isc_lex_ungettoken(lexer, &token);
}
RETERR(base64_decode_finish(&ctx));
if (length == -2 && before == after) {
return (ISC_R_UNEXPECTEDEND);
}
return (ISC_R_SUCCESS);
}

22
lib/isc/hex.c
View File

@@ -121,31 +121,43 @@ hex_decode_finish(hex_decode_ctx_t *ctx) {
isc_result_t
isc_hex_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length) {
unsigned int before, after;
hex_decode_ctx_t ctx;
isc_textregion_t *tr;
isc_token_t token;
bool eol;
REQUIRE(length >= -2);
hex_decode_init(&ctx, length, target);
before = isc_buffer_usedlength(target);
while (ctx.length != 0) {
unsigned int i;
if (length > 0)
if (length > 0) {
eol = false;
else
} else {
eol = true;
}
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string, eol));
if (token.type != isc_tokentype_string)
if (token.type != isc_tokentype_string) {
break;
}
tr = &token.value.as_textregion;
for (i = 0; i < tr->length; i++)
for (i = 0; i < tr->length; i++) {
RETERR(hex_decode_char(&ctx, tr->base[i]));
}
}
if (ctx.length < 0)
after = isc_buffer_usedlength(target);
if (ctx.length < 0) {
isc_lex_ungettoken(lexer, &token);
}
RETERR(hex_decode_finish(&ctx));
if (length == -2 && before == after) {
return (ISC_R_UNEXPECTEDEND);
}
return (ISC_R_SUCCESS);
}

21
lib/isc/include/isc/base32.h
View File

@@ -96,18 +96,27 @@ isc_result_t
isc_base32hexnp_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
/*!<
* \brief Convert text encoded in base32, base32hex, or base32hex
* non-padded from a lexer context into data.
* non-padded from a lexer context into `target`. If 'length' is
* non-negative, it is the expected number of encoded octets to convert.
*
* If 'length' is -1 then 0 or more encoded octets are expected.
* If 'length' is -2 then 1 or more encoded octets are expected.
*
* Returns:
*\li #ISC_R_BADBASE32 -- invalid base32 encoding.
*\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected
* number of encoded octets.
*
* Requires:
*\li 'lex' is a valid lexer context
*\li 'lexer' is a valid lexer context
*\li 'target' is a buffer containing binary data
*\li 'length' is an integer
*\li 'length' is -2, -1, or non-negative
*
* Ensures:
*\li target will contain the data represented by the base32 encoded
* string parsed by the lexer. No more than length bytes will be read,
* if length is positive. The 'used' pointer in target will be
* advanced as necessary.
* string parsed by the lexer. No more than `length` octets will
* be read, if `length` is non-negative. The 'used' pointer in
* 'target' will be advanced as necessary.
*/
isc_result_t

24
lib/isc/include/isc/base64.h
View File

@@ -71,22 +71,30 @@ isc_base64_decodestring(const char *cstr, isc_buffer_t *target);
isc_result_t
isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
/*!<
* \brief Convert base64 encoded text from a lexer context into data.
* \brief Convert base64 encoded text from a lexer context into
* `target`. If 'length' is non-negative, it is the expected number of
* encoded octets to convert.
*
* If 'length' is -1 then 0 or more encoded octets are expected.
* If 'length' is -2 then 1 or more encoded octets are expected.
*
* Returns:
*\li #ISC_R_BADBASE64 -- invalid base64 encoding.
*\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected
* number of encoded octets.
*
* Requires:
*\li 'lex' is a valid lexer context
*\li 'lexer' is a valid lexer context
*\li 'target' is a buffer containing binary data
*\li 'length' is an integer
*\li 'length' is -2, -1, or non-negative
*
* Ensures:
*\li target will contain the data represented by the base64 encoded
* string parsed by the lexer. No more than length bytes will be read,
* if length is positive. The 'used' pointer in target will be
* advanced as necessary.
* string parsed by the lexer. No more than `length` octets will
* be read, if `length` is non-negative. The 'used' pointer in
* 'target' will be advanced as necessary.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_BASE64_H */

23
lib/isc/include/isc/hex.h
View File

@@ -71,21 +71,30 @@ isc_hex_decodestring(const char *cstr, isc_buffer_t *target);
isc_result_t
isc_hex_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
/*!<
* \brief Convert hex encoded text from a lexer context into data.
* \brief Convert hex-encoded text from a lexer context into
* `target`. If 'length' is non-negative, it is the expected number of
* encoded octets to convert.
*
* If 'length' is -1 then 0 or more encoded octets are expected.
* If 'length' is -2 then 1 or more encoded octets are expected.
*
* Returns:
*\li #ISC_R_BADHEX -- invalid hex encoding
*\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected
* number of encoded octets.
*
* Requires:
*\li 'lex' is a valid lexer context
*\li 'lexer' is a valid lexer context
*\li 'target' is a buffer containing binary data
*\li 'length' is an integer
*\li 'length' is -2, -1, or non-negative
*
* Ensures:
*\li target will contain the data represented by the hex encoded
* string parsed by the lexer. No more than length bytes will be read,
* if length is positive. The 'used' pointer in target will be
* advanced as necessary.
* string parsed by the lexer. No more than `length` octets will
* be read, if `length` is non-negative. The 'used' pointer in
* 'target' will be advanced as necessary.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_HEX_H */