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sys/base64: corrected output size determination

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This commit is contained in:
BytesGalore 2016-11-29 18:06:12 +01:00
parent e224cf8de8
commit 49f89b4268
2 changed files with 82 additions and 2 deletions
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3
sys/base64/base64.c
View File

@ -59,8 +59,7 @@ static char getsymbol(unsigned char code)
int base64_encode(unsigned char *data_in, size_t data_in_size, \
unsigned char *base64_out, size_t *base64_out_size)
{
size_t padding_bytes = ((data_in_size % 3) ? (3 - (data_in_size % 3)) : 0);
size_t required_size = (4 * (data_in_size + 2 - ((data_in_size + 2) % 3)) / 3) + padding_bytes;
size_t required_size = 4 * ((data_in_size + 2) / 3);
if (data_in == NULL) {
return BASE64_ERROR_DATA_IN;

81
tests/unittests/tests-base64/tests-base64.c
View File

@ -301,6 +301,85 @@ static void test_base64_07_stream_decode(void)
#endif
}
static void test_base64_08_encode_16_bytes(void)
{
const int buffer_size = 16;
unsigned char buffer[buffer_size];
for (int i = 0; i < buffer_size; ++i) {
buffer[i] = 'a';
}
const size_t expected_out_size = 24;
size_t element_base64_out_size = expected_out_size;
unsigned char element_base64_out[expected_out_size];
size_t required_out_size = 0;
int ret = base64_encode(buffer, buffer_size, \
element_base64_out, &required_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
ret = base64_encode(buffer, buffer_size, \
element_base64_out, &element_base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
TEST_ASSERT_EQUAL_INT(expected_out_size, element_base64_out_size);
}
static void test_base64_09_encode_size_determination(void)
{
int buffer_size = 20;
unsigned char buffer[buffer_size];
for (int i = 0; i < buffer_size; ++i) {
buffer[i] = 'a';
}
size_t expected_out_size = 28;
size_t element_base64_out_size = expected_out_size;
unsigned char element_base64_out[expected_out_size];
// test 20 bytes input, expected 28 bytes output
size_t required_out_size = 0;
int ret = base64_encode(buffer, buffer_size, \
element_base64_out, &required_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
ret = base64_encode(buffer, buffer_size, \
element_base64_out, &element_base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
TEST_ASSERT_EQUAL_INT(expected_out_size, element_base64_out_size);
// test 19 bytes input, expected 28 bytes output
required_out_size = 0;
ret = base64_encode(buffer, 19, \
element_base64_out, &required_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
// test 18 bytes input, expected 24 bytes output
expected_out_size = 24;
required_out_size = 0;
ret = base64_encode(buffer, 18, \
element_base64_out, &required_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
// test 17 bytes input, expected 24 bytes output
expected_out_size = 24;
required_out_size = 0;
ret = base64_encode(buffer, 17, \
element_base64_out, &required_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_ERROR_BUFFER_OUT_SIZE, ret);
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
}
Test *tests_base64_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
@ -311,6 +390,8 @@ Test *tests_base64_tests(void)
new_TestFixture(test_base64_05_decode_larger),
new_TestFixture(test_base64_06_stream_encode),
new_TestFixture(test_base64_07_stream_decode),
new_TestFixture(test_base64_08_encode_16_bytes),
new_TestFixture(test_base64_09_encode_size_determination),
};
EMB_UNIT_TESTCALLER(base64_tests, NULL, NULL, fixtures);