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checking for buffer overflow in insertChars function

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This commit is contained in:
prozessorkern
2021-01-24 20:10:43 +01:00
parent a5bd5c57ab
commit c1f42d8239
2 changed files with 74 additions and 14 deletions
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55
test/unittest/shellmatta_utils/test_utils_insertChars.cpp
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@@ -123,3 +123,58 @@ TEST_CASE( "shellmatta_insertChars 0 length" ) {
CHECK( memcmp("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", write_data, sizeof(write_data) ) == 0u );
REQUIRE( memcmp("abcdefghij\0\0\0\0\0\0\0\0\0", buffer, sizeof(buffer)) == 0);
}
TEST_CASE( "shellmatta_insertChars buffer full" ) {
shellmatta_instance_t inst;
char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";
memset(&inst, 0, sizeof(inst));
inst.buffer = buffer;
inst.bufferSize = 20;
inst.cursor = 8;
inst.inputCount = 10;
inst.echoEnabled = true;
inst.write = writeFct;
write_callCnt = 0u;
memset(write_data, 0, sizeof(write_data));
write_idx = 0u;
utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 10u);
CHECK( inst.cursor == 18u );
CHECK( inst.inputCount == 20u );
CHECK( write_callCnt == 5u );
CHECK( memcmp("blksdflsd ", write_data, 10u ) == 0u );
REQUIRE( memcmp("abcdefghblksdflsd ij", buffer, sizeof(buffer)) == 0);
}
TEST_CASE( "shellmatta_insertChars buffer overflow by 1" ) {
shellmatta_instance_t inst;
char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";
memset(&inst, 0, sizeof(inst));
inst.buffer = buffer;
inst.bufferSize = 20;
inst.cursor = 8;
inst.inputCount = 10;
inst.echoEnabled = true;
inst.write = writeFct;
write_callCnt = 0u;
memset(write_data, 0, sizeof(write_data));
write_idx = 0u;
utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 11u);
CHECK( inst.cursor == 18u );
CHECK( inst.inputCount == 20u );
CHECK( write_callCnt == 5u );
CHECK( memcmp("blksdflsd ", write_data, 10u ) == 0u );
REQUIRE( memcmp("abcdefghblksdflsd ij", buffer, sizeof(buffer)) == 0);
}