From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: Notmuch Mail <notmuch@notmuchmail.org>
Subject: Re: [PATCH 03/18] crypto: use stashed session-key properties for decryption, if available
Date: Thu, 26 Oct 2017 15:00:41 -0400 [thread overview]
Message-ID: <87d159ybs6.fsf@fifthhorseman.net> (raw)
In-Reply-To: <20171025065203.24403-4-dkg@fifthhorseman.net>
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On Wed 2017-10-25 02:51:48 -0400, Daniel Kahn Gillmor wrote:
> diff --git a/util/crypto.c b/util/crypto.c
> index 087536ec..e014db5d 100644
> --- a/util/crypto.c
> +++ b/util/crypto.c
> @@ -140,13 +140,42 @@ void _notmuch_crypto_cleanup (unused(_notmuch_crypto_t *crypto))
> #endif
>
> GMimeObject *
> -_notmuch_crypto_decrypt (g_mime_3_unused(GMimeCryptoContext* crypto_ctx),
> +_notmuch_crypto_decrypt (notmuch_message_t *message,
> + g_mime_3_unused(GMimeCryptoContext* crypto_ctx),
> GMimeMultipartEncrypted *part,
> GMimeDecryptResult **decrypt_result,
> GError **err)
> {
> GMimeObject *ret = NULL;
>
> + /* the versions of notmuch that can support session key decryption */
> +#if (GMIME_MAJOR_VERSION >= 3 || (GMIME_MAJOR_VERSION == 2 && GMIME_MINOR_VERSION == 6 && GMIME_MICRO_VERSION >= 21))
> + if (message) {
> + notmuch_message_properties_t *list = NULL;
> +
> + for (list = notmuch_message_get_properties (message, "session-key", TRUE);
> + notmuch_message_properties_valid (list); notmuch_message_properties_move_to_next (list)) {
> +#if (GMIME_MAJOR_VERSION < 3)
> + ret = g_mime_multipart_encrypted_decrypt_session (part,
> + crypto_ctx,
> + notmuch_message_properties_value (list),
> + decrypt_result, err);
> +#else
> + ret = g_mime_multipart_encrypted_decrypt (part,
> + GMIME_DECRYPT_NONE,
> + notmuch_message_properties_value (list),
> + decrypt_result, err);
> +#endif
> + if (ret)
> + break;
> + }
> + if (list)
> + notmuch_message_properties_destroy (list);
> + if (ret)
> + return ret;
> + }
> +#endif
> +
> #if (GMIME_MAJOR_VERSION < 3)
> ret = g_mime_multipart_encrypted_decrypt(part, crypto_ctx,
> decrypt_result, err);
In the change above, i realized that we might accidentally clobber the
GError of any intermediate failed decryption attempt, which would
produce a GLib warning to stderr.
In my revised/updated series ("session-keys" on
https://gitlab.com/dkg/notmuch), i clear err (if present) before each
attempted decryption. This effectively throws away all errors except
for the last one, but i think that's the right thing to do -- we'll try
whatever we can for decrypting, but if the final decryption fails,
that's the error we'd want reported back anyway.
--dkg the self-reviewer :)
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next prev parent reply other threads:[~2017-10-26 19:32 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-25 6:51 Stashed session keys Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 01/18] mime-node: handle decrypt_result more safely Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 02/18] crypto: add _notmuch_crypto_decrypt wrapper function Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 03/18] crypto: use stashed session-key properties for decryption, if available Daniel Kahn Gillmor
2017-10-26 19:00 ` Daniel Kahn Gillmor [this message]
2017-11-14 13:02 ` David Bremner
2017-11-14 13:54 ` Daniel Kahn Gillmor
2017-11-15 12:59 ` David Bremner
2017-10-25 6:51 ` [PATCH 04/18] test/corpora: add an encrypted message for index decryption tests Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 05/18] crypto: Test restore of cleartext index from stashed session keys Daniel Kahn Gillmor
2017-11-14 13:13 ` David Bremner
2017-11-14 13:58 ` Daniel Kahn Gillmor
2017-11-14 14:27 ` David Bremner
2017-10-25 6:51 ` [PATCH 06/18] lib: convert notmuch decryption policy to an enum Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 07/18] crypto: new decryption policy "auto" Daniel Kahn Gillmor
2017-11-11 23:14 ` Jameson Graef Rollins
2017-11-12 3:39 ` Daniel Kahn Gillmor
2017-11-12 15:26 ` Jameson Graef Rollins
2017-11-14 13:21 ` David Bremner
2017-10-25 6:51 ` [PATCH 08/18] cli/reply: use decryption policy "auto" by default Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 09/18] cli/show: " Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 10/18] cli/show, reply: document use of stashed session keys in notmuch-properties Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 11/18] cli/new, insert, reindex: update documentation for --try-decrypt=auto Daniel Kahn Gillmor
2017-11-15 20:02 ` David Bremner
2017-10-25 6:51 ` [PATCH 12/18] crypto: record whether an actual decryption attempt happened Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 13/18] cli/new, insert, reindex: change index.try_decrypt to "auto" by default Daniel Kahn Gillmor
2017-11-16 12:40 ` David Bremner
2017-11-30 6:16 ` Daniel Kahn Gillmor
2017-10-25 6:51 ` [PATCH 14/18] cli/reindex: destroy stashed session keys when --try-decrypt=false Daniel Kahn Gillmor
2017-10-25 6:52 ` [PATCH 15/18] crypto: actually stash session keys when try-decrypt=true Daniel Kahn Gillmor
2017-11-16 12:53 ` David Bremner
2017-11-30 15:57 ` Daniel Kahn Gillmor
2017-12-02 1:56 ` David Bremner
2017-10-25 6:52 ` [PATCH 16/18] crypto: add --try-decrypt=nostash to avoid stashing session keys Daniel Kahn Gillmor
2017-10-25 14:46 ` Daniel Kahn Gillmor
2017-11-16 13:02 ` David Bremner
2017-10-25 6:52 ` [PATCH 17/18] docs: clean up documentation about decryption policies Daniel Kahn Gillmor
2017-10-25 6:52 ` [PATCH 18/18] python: add try_decrypt argument to Database.index_file() Daniel Kahn Gillmor
2017-11-16 13:06 ` David Bremner
2017-11-30 15:58 ` Daniel Kahn Gillmor
2017-11-11 7:56 ` Stashed session keys Daniel Kahn Gillmor
2017-11-11 23:31 ` Jameson Graef Rollins
2017-11-12 3:51 ` Daniel Kahn Gillmor
2017-11-12 15:15 ` Jameson Graef Rollins
2017-11-12 18:51 ` Daniel Kahn Gillmor
2017-11-15 22:41 ` meskio
2017-11-16 16:03 ` Daniel Kahn Gillmor
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