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From 4f36220ccfe40621cd7df3595568278d7bca4f87 Mon Sep 17 00:00:00 2001
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From: Franck Bui <fbui@suse.com>
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Date: Fri, 23 Sep 2016 13:33:01 +0200
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Subject: [PATCH] journal: fix HMAC calculation when appending a data object
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Since commit 5996c7c295e073ce21d41305169132c8aa993ad0 (v190 !), the
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calculation of the HMAC is broken because the hash for a data object
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including a field is done in the wrong order: the field object is
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hashed before the data object is.
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However during verification, the hash is done in the opposite order as
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objects are scanned sequentially.
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(cherry picked from commit 33685a5a3a98c6ded64d0cc25e37d0180ceb0a6a)
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---
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src/journal/journal-file.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
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index 2bb3a9757..586f620e2 100644
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--- a/src/journal/journal-file.c
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+++ b/src/journal/journal-file.c
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@@ -1099,6 +1099,12 @@ static int journal_file_append_data(
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if (r < 0)
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return r;
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+#ifdef HAVE_GCRYPT
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+ r = journal_file_hmac_put_object(f, OBJECT_DATA, o, p);
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+ if (r < 0)
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+ return r;
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+#endif
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+
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/* The linking might have altered the window, so let's
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* refresh our pointer */
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r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
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@@ -1123,12 +1129,6 @@ static int journal_file_append_data(
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fo->field.head_data_offset = le64toh(p);
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}
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-#ifdef HAVE_GCRYPT
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- r = journal_file_hmac_put_object(f, OBJECT_DATA, o, p);
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- if (r < 0)
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- return r;
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-#endif
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-
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if (ret)
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*ret = o;
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