1 files changed, 74 insertions, 0 deletions
diff --git a/tests/suites/test_suite_chacha20.function b/tests/suites/test_suite_chacha20.function
new file mode 100644
index 000000000..9afadb773
--- /dev/null
+++ b/tests/suites/test_suite_chacha20.function
@@ -0,0 +1,74 @@
+/* BEGIN_HEADER */
+#include "mbedtls/chacha20.h"
+/* END_HEADER */
+
+/* BEGIN_DEPENDENCIES
+ * depends_on:MBEDTLS_CHACHA20_C
+ * END_DEPENDENCIES
+ */
+
+/* BEGIN_CASE */
+void chacha20_crypt( data_t *key_str,
+                     data_t *nonce_str,
+                     int counter,
+                     data_t *src_str,
+                     data_t *expected_output_str )
+{
+    unsigned char output[375];
+    mbedtls_chacha20_context ctx;
+
+    memset( output, 0x00, sizeof( output ) );
+
+    TEST_ASSERT( src_str->len   == expected_output_str->len );
+    TEST_ASSERT( key_str->len   == 32U );
+    TEST_ASSERT( nonce_str->len == 12U );
+
+    /*
+     * Test the integrated API
+     */
+    TEST_ASSERT( mbedtls_chacha20_crypt( key_str->x, nonce_str->x, counter, src_str->len, src_str->x, output ) == 0 );
+
+    ASSERT_COMPARE( output, expected_output_str->len,
+                    expected_output_str->x, expected_output_str->len );
+
+    /*
+     * Test the streaming API
+     */
+    mbedtls_chacha20_init( &ctx );
+
+    TEST_ASSERT( mbedtls_chacha20_setkey( &ctx, key_str->x ) == 0 );
+
+    TEST_ASSERT( mbedtls_chacha20_starts( &ctx, nonce_str->x, counter ) == 0 );
+
+    memset( output, 0x00, sizeof( output ) );
+    TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_str->len, src_str->x, output ) == 0 );
+
+    ASSERT_COMPARE( output, expected_output_str->len,
+                    expected_output_str->x, expected_output_str->len );
+
+    /*
+     * Test the streaming API again, piecewise
+     */
+
+    /* Don't free/init the context nor set the key again,
+     * in order to test that starts() does the right thing. */
+    TEST_ASSERT( mbedtls_chacha20_starts( &ctx, nonce_str->x, counter ) == 0 );
+
+    memset( output, 0x00, sizeof( output ) );
+    TEST_ASSERT( mbedtls_chacha20_update( &ctx, 1, src_str->x, output ) == 0 );
+    TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_str->len - 1,
+                                          src_str->x + 1, output + 1 ) == 0 );
+
+    ASSERT_COMPARE( output, expected_output_str->len,
+                    expected_output_str->x, expected_output_str->len );
+
+    mbedtls_chacha20_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
+void chacha20_self_test()
+{
+    TEST_ASSERT( mbedtls_chacha20_self_test( 1 ) == 0 );
+}
+/* END_CASE */