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Fix buffer over-reads in the rendcache tests

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The hidden service descriptor cache (rendcache) tests use digest maps
which expect keys to have a length of DIGEST_LEN.

Because the tests use key strings with a length lower than DIGEST_LEN,
the internal copy operation reads outside the key strings which leads to
buffer over-reads.

The issue is resolved by using character arrays with a size of
DIGEST_LEN.

Patch on ade5005853.
This commit is contained in:
cypherpunks 2015-11-11 14:47:35 +01:00 committed by Nick Mathewson
parent 3d0d2a511c
commit c94aa4573a
1 changed files with 29 additions and 20 deletions
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49
src/test/test_rendcache.c
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@ -767,28 +767,31 @@ test_rend_cache_failure_intro_lookup(void *data)
rend_cache_failure_t *failure;
rend_cache_failure_intro_t *ip;
rend_cache_failure_intro_t *entry;
const char key_ip_one[DIGEST_LEN] = "ip1";
const char key_ip_two[DIGEST_LEN] = "ip2";
const char key_foo[DIGEST_LEN] = "foo1";
rend_cache_init();
failure = rend_cache_failure_entry_new();
ip = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT);
digestmap_set(failure->intro_failures, "ip1", ip);
digestmap_set(failure->intro_failures, key_ip_one, ip);
strmap_set_lc(rend_cache_failure, "foo1", failure);
// Test not found
ret = cache_failure_intro_lookup((const uint8_t *)"foo1", "foo2", NULL);
ret = cache_failure_intro_lookup((const uint8_t *) key_foo, "foo2", NULL);
tt_int_op(ret, OP_EQ, 0);
// Test found with no intro failures in it
ret = cache_failure_intro_lookup((const uint8_t *)"ip2", "foo1", NULL);
ret = cache_failure_intro_lookup((const uint8_t *) key_ip_two, "foo1", NULL);
tt_int_op(ret, OP_EQ, 0);
// Test found
ret = cache_failure_intro_lookup((const uint8_t *)"ip1", "foo1", NULL);
ret = cache_failure_intro_lookup((const uint8_t *) key_ip_one, "foo1", NULL);
tt_int_op(ret, OP_EQ, 1);
// Test found and asking for entry
cache_failure_intro_lookup((const uint8_t *)"ip1", "foo1", &entry);
cache_failure_intro_lookup((const uint8_t *) key_ip_one, "foo1", &entry);
tt_assert(entry);
tt_assert(entry == ip);
@ -892,6 +895,9 @@ test_rend_cache_failure_clean(void *data)
rend_cache_failure_t *failure;
rend_cache_failure_intro_t *ip_one, *ip_two;
const char key_one[DIGEST_LEN] = "ip1";
const char key_two[DIGEST_LEN] = "ip2";
(void)data;
rend_cache_init();
@ -909,7 +915,7 @@ test_rend_cache_failure_clean(void *data)
// Test with one new intro point
failure = rend_cache_failure_entry_new();
ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT);
digestmap_set(failure->intro_failures, "ip1", ip_one);
digestmap_set(failure->intro_failures, key_one, ip_one);
strmap_set_lc(rend_cache_failure, "foo1", failure);
rend_cache_failure_clean(time(NULL));
tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 1);
@ -919,7 +925,7 @@ test_rend_cache_failure_clean(void *data)
failure = rend_cache_failure_entry_new();
ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT);
ip_one->created_ts = time(NULL) - 7*60;
digestmap_set(failure->intro_failures, "ip1", ip_one);
digestmap_set(failure->intro_failures, key_one, ip_one);
strmap_set_lc(rend_cache_failure, "foo1", failure);
rend_cache_failure_clean(time(NULL));
tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 0);
@ -929,10 +935,10 @@ test_rend_cache_failure_clean(void *data)
failure = rend_cache_failure_entry_new();
ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT);
ip_one->created_ts = time(NULL) - 7*60;
digestmap_set(failure->intro_failures, "ip1", ip_one);
digestmap_set(failure->intro_failures, key_one, ip_one);
ip_two = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT);
ip_two->created_ts = time(NULL) - 2*60;
digestmap_set(failure->intro_failures, "ip2", ip_two);
digestmap_set(failure->intro_failures, key_two, ip_two);
strmap_set_lc(rend_cache_failure, "foo1", failure);
rend_cache_failure_clean(time(NULL));
tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 1);
@ -1051,25 +1057,26 @@ test_rend_cache_failure_intro_add(void *data)
(void)data;
rend_cache_failure_t *fail_entry;
rend_cache_failure_intro_t *entry;
const char identity[DIGEST_LEN] = "foo1";
rend_cache_init();
// Adds non-existing entry
cache_failure_intro_add((const uint8_t *)"foo1", "foo2",
cache_failure_intro_add((const uint8_t *) identity, "foo2",
INTRO_POINT_FAILURE_TIMEOUT);
fail_entry = strmap_get_lc(rend_cache_failure, "foo2");
tt_assert(fail_entry);
tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1);
entry = digestmap_get(fail_entry->intro_failures, "foo1");
entry = digestmap_get(fail_entry->intro_failures, identity);
tt_assert(entry);
// Adds existing entry
cache_failure_intro_add((const uint8_t *)"foo1", "foo2",
cache_failure_intro_add((const uint8_t *) identity, "foo2",
INTRO_POINT_FAILURE_TIMEOUT);
fail_entry = strmap_get_lc(rend_cache_failure, "foo2");
tt_assert(fail_entry);
tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1);
entry = digestmap_get(fail_entry->intro_failures, "foo1");
entry = digestmap_get(fail_entry->intro_failures, identity);
tt_assert(entry);
done:
@ -1082,22 +1089,23 @@ test_rend_cache_intro_failure_note(void *data)
(void)data;
rend_cache_failure_t *fail_entry;
rend_cache_failure_intro_t *entry;
const char key[DIGEST_LEN] = "foo1";
rend_cache_init();
// Test not found
rend_cache_intro_failure_note(INTRO_POINT_FAILURE_TIMEOUT,
(const uint8_t *)"foo1", "foo2");
(const uint8_t *) key, "foo2");
fail_entry = strmap_get_lc(rend_cache_failure, "foo2");
tt_assert(fail_entry);
tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1);
entry = digestmap_get(fail_entry->intro_failures, "foo1");
entry = digestmap_get(fail_entry->intro_failures, key);
tt_assert(entry);
tt_int_op(entry->failure_type, OP_EQ, INTRO_POINT_FAILURE_TIMEOUT);
// Test found
rend_cache_intro_failure_note(INTRO_POINT_FAILURE_UNREACHABLE,
(const uint8_t *)"foo1", "foo2");
(const uint8_t *) key, "foo2");
tt_int_op(entry->failure_type, OP_EQ, INTRO_POINT_FAILURE_UNREACHABLE);
done:
@ -1121,6 +1129,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data)
time_t now;
rend_service_descriptor_t *desc;
now = time(NULL);
const char key[DIGEST_LEN] = "abcde";
(void)data;
@ -1138,7 +1147,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data)
desc->timestamp = now;
desc->pk = pk_generate(0);
e->parsed = desc;
digestmap_set(rend_cache_v2_dir, "abcde", e);
digestmap_set(rend_cache_v2_dir, key, e);
hid_serv_responsible_for_desc_id_response = 1;
rend_cache_clean_v2_descs_as_dir(now, 0);
@ -1157,7 +1166,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data)
desc->timestamp = now;
desc->pk = pk_generate(0);
e->parsed = desc;
digestmap_set(rend_cache_v2_dir, "abcde", e);
digestmap_set(rend_cache_v2_dir, key, e);
hid_serv_responsible_for_desc_id_response = 0;
rend_cache_clean_v2_descs_as_dir(now, 0);
@ -1170,7 +1179,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data)
desc->timestamp = now;
desc->pk = pk_generate(0);
e->parsed = desc;
digestmap_set(rend_cache_v2_dir, "abcde", e);
digestmap_set(rend_cache_v2_dir, key, e);
hid_serv_responsible_for_desc_id_response = 1;
rend_cache_clean_v2_descs_as_dir(now, 0);
@ -1183,7 +1192,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data)
desc->timestamp = now;
desc->pk = pk_generate(0);
e->parsed = desc;
digestmap_set(rend_cache_v2_dir, "abcde", e);
digestmap_set(rend_cache_v2_dir, key, e);
hid_serv_responsible_for_desc_id_response = 1;
rend_cache_clean_v2_descs_as_dir(now, 20000);