DHM: add notes about leading zeros
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_dhm.function b/tests/suites/test_suite_dhm.function
index edd9698..c51ec94 100644
--- a/tests/suites/test_suite_dhm.function
+++ b/tests/suites/test_suite_dhm.function
@@ -16,6 +16,8 @@
TEST_ASSERT( size >= *offset + 2 );
n = ( buffer[*offset] << 8 ) | buffer[*offset + 1];
*offset += 2;
+ /* The DHM param output from Mbed TLS has leading zeros stripped, as
+ * permitted but not required by RFC 5246 \S4.4. */
TEST_EQUAL( n, mbedtls_mpi_size( expected ) );
TEST_ASSERT( size >= *offset + n );
TEST_EQUAL( 0, mbedtls_mpi_read_binary( &actual, buffer + *offset, n ) );