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lib/pull: Update summary checksum code to use new checksum API

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This is another case where making an input stream out of a memory buffer is a
bit silly; just hash the `GBytes` directly.

Closes: #1287
Approved by: jlebon
This commit is contained in:
Colin Walters 2017-10-17 21:07:19 -04:00 committed by Atomic Bot
parent 075e676eb6
commit de5f781089
1 changed files with 9 additions and 15 deletions
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24
src/libostree/ostree-repo-pull.c
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@ -2457,34 +2457,28 @@ on_superblock_fetched (GObject *src,
}
else
{
g_autofree gchar *delta = NULL;
g_autofree guchar *ret_csum = NULL;
guchar *summary_csum;
g_autoptr (GInputStream) summary_is = NULL;
g_autoptr(GVariant) delta_superblock = NULL;
g_autofree gchar *delta = g_strconcat (from_revision ? from_revision : "", from_revision ? "-" : "", to_revision, NULL);
const guchar *expected_summary_digest = g_hash_table_lookup (pull_data->summary_deltas_checksums, delta);
guint8 actual_summary_digest[OSTREE_SHA256_DIGEST_LEN];
summary_is = g_memory_input_stream_new_from_data (g_bytes_get_data (delta_superblock_data, NULL),
g_bytes_get_size (delta_superblock_data),
NULL);
if (!ot_gio_checksum_stream (summary_is, &ret_csum, pull_data->cancellable, error))
goto out;
delta = g_strconcat (from_revision ? from_revision : "", from_revision ? "-" : "", to_revision, NULL);
summary_csum = g_hash_table_lookup (pull_data->summary_deltas_checksums, delta);
g_auto(OtChecksum) hasher = { 0, };
ot_checksum_init (&hasher);
ot_checksum_update_bytes (&hasher, delta_superblock_data);
ot_checksum_get_digest (&hasher, actual_summary_digest, sizeof (actual_summary_digest));
/* At this point we've GPG verified the data, so in theory
* could trust that they provided the right data, but let's
* make this a hard error.
*/
if (pull_data->gpg_verify_summary && !summary_csum)
if (pull_data->gpg_verify_summary && !expected_summary_digest)
{
g_set_error (error, OSTREE_GPG_ERROR, OSTREE_GPG_ERROR_NO_SIGNATURE,
"GPG verification enabled, but no summary signatures found (use gpg-verify-summary=false in remote config to disable)");
goto out;
}
if (summary_csum && memcmp (summary_csum, ret_csum, 32))
if (expected_summary_digest && memcmp (expected_summary_digest, actual_summary_digest, sizeof (actual_summary_digest)))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Invalid checksum for static delta %s", delta);
goto out;