libavutil/encryption_info: Add unit tests.

Signed-off-by: Jacob Trimble <modmaker@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

3 files changed, 178 insertions, 0 deletions

diff --git a/libavutil/Makefile b/libavutil/Makefile
index d0632f16a6..9ed24cfc82 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -200,6 +200,7 @@ TESTPROGS = adler32                                                     \
             des                                                         \
             dict                                                        \
             display                                                     \
+            encryption_info                                             \
             error                                                       \
             eval                                                        \
             file                                                        \
diff --git a/libavutil/tests/.gitignore b/libavutil/tests/.gitignore
index bf07c57b75..9d90827954 100644
--- a/libavutil/tests/.gitignore
+++ b/libavutil/tests/.gitignore
@@ -17,6 +17,7 @@
 /dict
 /display
 /error
+/encryption_info
 /eval
 /fifo
 /file
diff --git a/libavutil/tests/encryption_info.c b/libavutil/tests/encryption_info.c
new file mode 100644
index 0000000000..d489612b7d
--- /dev/null
+++ b/libavutil/tests/encryption_info.c
@@ -0,0 +1,176 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/encryption_info.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "libavutil/avassert.h"
+
+static const AVSubsampleEncryptionInfo test_subsamples[] = {{1, 2}, {3, 4}, {5, 6}, {7, 8}};
+static const size_t test_subsample_count = sizeof(test_subsamples) / sizeof(test_subsamples[0]);
+static const uint8_t test_iv[] = {0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18};
+static const uint8_t test_key_id[] = {0x21, 0x22, 0x23, 0x24};
+static const uint8_t test_key_id_2[] = {0x31, 0x32, 0x33, 0x34};
+static const uint8_t test_system_id[] = {0x41, 0x42, 0x43};
+static const uint8_t test_data[] = {0x51, 0x52};
+
+static int compare_encryption_info(const AVEncryptionInfo *a, const AVEncryptionInfo *b) {
+    if (!a || !b || a->scheme != b->scheme || a->crypt_byte_block != b->crypt_byte_block ||
+        a->skip_byte_block != b->skip_byte_block || a->key_id_size != b->key_id_size ||
+        a->iv_size != b->iv_size || a->subsample_count != b->subsample_count)
+        return 1;
+
+    if (memcmp(a->key_id, b->key_id, a->key_id_size) != 0 ||
+        memcmp(a->iv, b->iv, a->iv_size) != 0 ||
+        memcmp(a->subsamples, b->subsamples, a->subsample_count * sizeof(a->subsamples[0])))
+        return 1;
+
+    return 0;
+}
+
+static int compare_encryption_init_info(const AVEncryptionInitInfo *a, const AVEncryptionInitInfo *b) {
+    if (!a || !b || a->system_id_size != b->system_id_size ||
+        a->num_key_ids != b->num_key_ids || a->key_id_size != b->key_id_size ||
+        a->data_size != b->data_size)
+        return 1;
+
+    if (memcmp(a->system_id, b->system_id, a->system_id_size) != 0 ||
+        memcmp(a->data, b->data, a->data_size) != 0)
+        return 1;
+
+    for (uint32_t i = 0; i < a->num_key_ids; i++) {
+        if (memcmp(a->key_ids[i], b->key_ids[i], a->key_id_size) != 0)
+            return 1;
+    }
+
+    if (a->next || b->next) {
+        if (!a->next || !b->next)
+            return 1;
+        if (compare_encryption_init_info(a->next, b->next) != 0)
+            return 1;
+    }
+
+    return 0;
+}
+
+static void run_encryption_info_test(void)
+{
+    AVEncryptionInfo *info, *copy;
+    uint8_t *side_data;
+    size_t side_data_size;
+
+    info = av_encryption_info_alloc(test_subsample_count, sizeof(test_key_id), sizeof(test_iv));
+    av_assert0(info);
+    av_assert0(info->key_id);
+    av_assert0(info->key_id_size == sizeof(test_key_id));
+    av_assert0(info->iv);
+    av_assert0(info->iv_size == sizeof(test_iv));
+    av_assert0(info->subsamples);
+    av_assert0(info->subsample_count == test_subsample_count);
+
+    info->scheme = 1234;
+    info->crypt_byte_block = 333;
+    info->skip_byte_block = 444;
+    memcpy(info->key_id, test_key_id, sizeof(test_key_id));
+    memcpy(info->iv, test_iv, sizeof(test_iv));
+    memcpy(info->subsamples, test_subsamples, sizeof(test_subsamples));
+
+    copy = av_encryption_info_clone(info);
+    av_assert0(copy);
+    av_assert0(copy != info);
+    av_assert0(compare_encryption_info(info, copy) == 0);
+    av_encryption_info_free(copy);
+
+    side_data = av_encryption_info_add_side_data(info, &side_data_size);
+    av_assert0(side_data);
+    av_assert0(side_data_size > 0);
+
+    copy = av_encryption_info_get_side_data(side_data, side_data_size);
+    av_assert0(copy);
+    av_assert0(copy != info);
+    av_assert0(compare_encryption_info(info, copy) == 0);
+    av_encryption_info_free(copy);
+    av_free(side_data);
+
+    av_encryption_info_free(info);
+}
+
+static AVEncryptionInitInfo *create_init_info(void)
+{
+    AVEncryptionInitInfo *info;
+
+    info = av_encryption_init_info_alloc(sizeof(test_system_id), 2, sizeof(test_key_id), sizeof(test_data));
+    av_assert0(info);
+    av_assert0(info->system_id);
+    av_assert0(info->system_id_size == sizeof(test_system_id));
+    av_assert0(info->key_ids);
+    av_assert0(info->num_key_ids == 2);
+    av_assert0(info->key_id_size == sizeof(test_key_id));
+    av_assert0(info->key_ids[0]);
+    av_assert0(info->key_ids[1]);
+    av_assert0(info->data);
+    av_assert0(info->data_size == sizeof(test_data));
+    av_assert0(!info->next);
+
+    memcpy(info->system_id, test_system_id, sizeof(test_system_id));
+    memcpy(info->key_ids[0], test_key_id, sizeof(test_key_id));
+    memcpy(info->key_ids[1], test_key_id_2, sizeof(test_key_id_2));
+    memcpy(info->data, test_data, sizeof(test_data));
+
+    return info;
+}
+
+static void run_encryption_init_info_test(void)
+{
+    AVEncryptionInitInfo *info, *copy;
+    uint8_t *side_data;
+    size_t side_data_size;
+
+    info = create_init_info();
+
+    side_data = av_encryption_init_info_add_side_data(info, &side_data_size);
+    av_assert0(side_data);
+    av_assert0(side_data_size > 0);
+    copy = av_encryption_init_info_get_side_data(side_data, side_data_size);
+    av_assert0(copy);
+    av_assert0(compare_encryption_init_info(info, copy) == 0);
+    av_encryption_init_info_free(copy);
+    av_free(side_data);
+
+    // Make the first init info different from the second to test the correct order.
+    memset(info->system_id, 0, info->system_id_size);
+    info->next = create_init_info();
+    side_data = av_encryption_init_info_add_side_data(info, &side_data_size);
+    av_assert0(side_data);
+    copy = av_encryption_init_info_get_side_data(side_data, side_data_size);
+    av_assert0(copy);
+    av_assert0(compare_encryption_init_info(info, copy) == 0);
+    av_encryption_init_info_free(copy);
+    av_free(side_data);
+
+    av_encryption_init_info_free(info);
+}
+
+int main(int argc, char **argv)
+{
+    run_encryption_info_test();
+    run_encryption_init_info_test();
+    return 0;
+}