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Merge pull request #12392 from aabadie/pr/sys/base64_fix_empty

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sys/base64: fix handling of empty buffers
This commit is contained in:
Alexandre Abadie 2019-10-08 16:59:48 +02:00 committed by GitHub
commit c20199cd3e
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 39 additions and 5 deletions
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10
sys/base64/base64.c
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@ -66,8 +66,9 @@ int base64_encode(const void *data_in, size_t data_in_size,
return BASE64_ERROR_DATA_IN;
}
if (data_in_size < 1) {
return BASE64_ERROR_DATA_IN_SIZE;
if (data_in_size == 0) {
*base64_out_size = 0;
return BASE64_SUCCESS;
}
if (*base64_out_size < required_size) {
@ -170,6 +171,11 @@ int base64_decode(const unsigned char *base64_in, size_t base64_in_size,
return BASE64_ERROR_DATA_IN;
}
if (base64_in_size == 0) {
*data_out_size = 0;
return BASE64_SUCCESS;
}
if (base64_in_size < 4) {
return BASE64_ERROR_DATA_IN_SIZE;
}

5
sys/include/base64.h
View File

@ -71,8 +71,7 @@ static inline size_t base64_estimate_encode_size(size_t data_in_size)
BASE64_ERROR_BUFFER_OUT_SIZE on insufficient size for encoding to `base64_out`,
BASE64_ERROR_BUFFER_OUT if `base64_out` equals NULL
but the `base64_out_size` is sufficient,
BASE64_ERROR_DATA_IN if `data_in` equals NULL,
BASE64_ERROR_DATA_IN_SIZE if `data_in_size` is less than 1.
BASE64_ERROR_DATA_IN if `data_in` equals NULL.
*/
int base64_encode(const void *data_in, size_t data_in_size,
unsigned char *base64_out, size_t *base64_out_size);
@ -93,7 +92,7 @@ int base64_encode(const void *data_in, size_t data_in_size,
BASE64_ERROR_BUFFER_OUT if `data_out` equals NULL
but the size for `data_out_size` is sufficient,
BASE64_ERROR_DATA_IN if `base64_in` equals NULL,
BASE64_ERROR_DATA_IN_SIZE if `base64_in_size` is less than 4.
BASE64_ERROR_DATA_IN_SIZE if `base64_in_size` is between 1 and 4.
*/
int base64_decode(const unsigned char *base64_in, size_t base64_in_size,
void *data_out, size_t *data_out_size);

29
tests/unittests/tests-base64/tests-base64.c
View File

@ -383,6 +383,33 @@ static void test_base64_09_encode_size_determination(void)
TEST_ASSERT_EQUAL_INT(required_out_size, expected_out_size);
}
static void test_base64_10_encode_empty(void)
{
unsigned char data_in[] = "";
size_t base64_out_size = 8;
unsigned char base64_out[8];
int ret = base64_encode(data_in, 0, base64_out, &base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
TEST_ASSERT_EQUAL_INT(0, base64_out_size);
}
static void test_base64_10_decode_empty(void)
{
unsigned char data_in[] = "";
size_t base64_out_size = 8;
unsigned char base64_out[8];
int ret = base64_decode(data_in, 0, base64_out, &base64_out_size);
TEST_ASSERT_EQUAL_INT(BASE64_SUCCESS, ret);
TEST_ASSERT_EQUAL_INT(0, base64_out_size);
}
Test *tests_base64_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
@ -395,6 +422,8 @@ Test *tests_base64_tests(void)
new_TestFixture(test_base64_07_stream_decode),
new_TestFixture(test_base64_08_encode_16_bytes),
new_TestFixture(test_base64_09_encode_size_determination),
new_TestFixture(test_base64_10_encode_empty),
new_TestFixture(test_base64_10_decode_empty),
};
EMB_UNIT_TESTCALLER(base64_tests, NULL, NULL, fixtures);