mbedtls_base64_decode: test dst=NULL with dlen>0
The documentation explicitly says that `*dst = NULL` **or** `dlen = 0`
triggers tell-me-the-output-length mode.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_base64.function b/tests/suites/test_suite_base64.function
index df63aea..5d8ed9b 100644
--- a/tests/suites/test_suite_base64.function
+++ b/tests/suites/test_suite_base64.function
@@ -132,6 +132,14 @@
TEST_EQUAL(correct_dst_len, len);
}
+ /* Test dst=NULL with dlen!=0 (explicitly documented as supported) */
+ if (result == 0 && dst_size != 0) {
+ TEST_EQUAL(mbedtls_base64_decode(NULL, 42, &len,
+ src, src_len),
+ MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);
+ TEST_EQUAL(correct_dst_len, len);
+ }
+
exit:
mbedtls_free(src);
mbedtls_free(dst);