[Bug 1994165] Re: CMS_final: do not ignore CMS_dataFinal result

[Sergio Durigan Junior]

Ah, I noticed that this is part of a big SRU that's being completed on
bug #2033422.  Just leaving a comment here for the record.

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Title:
  CMS_final: do not ignore CMS_dataFinal result

Status in openssl package in Ubuntu:
  Fix Released
Status in openssl source package in Jammy:
  In Progress
Status in openssl source package in Kinetic:
  Won't Fix
Status in openssl source package in Lunar:
  Fix Released

Bug description:
  === SRU information ===
  [Meta]
  This bug is part of a series of four bugs for a single SRU.
  The "central" bug with the global information and debdiff is http://pad.lv/2033422

  [Impact]
  S/MIME signature can fail silently
  The commit by upstream propagates the return code of some functions rather than ignore it.

  [Test plan]
  This issue is not very simple to reproduce because "openssl cms" cannot be used to do so. This has to be done with the openssl API instead.
  At least the bug reportere here and the one on openssl's bug tracker have confirmed the patch solves the issue. Additionally, the bug reporter here has tested the PPA that contains the patche and validated it. Finally, I read through the patch attentively.

  [Where problems could occur]
  At this point it is unlikely an error would appear. The openssl bug tracker mentions nothing related to this patch which landed more than a year ago. The patch is simple and doesn't change the code logic.

  [Patches]
  The patches come directly from upstream and apply cleanly.

  https://github.com/openssl/openssl/pull/18876

  * https://git.launchpad.net/~adrien-n/ubuntu/+source/openssl/tree/debian/patches/jammy-sru-0001-REGRESSION-CMS_final-do-not-ignore-CMS_dataFinal-res.patch?h=jammy-sru&id=04ef023920ab08fba214817523fba897527dfff0
  * https://git.launchpad.net/~adrien-n/ubuntu/+source/openssl/tree/debian/patches/jammy-sru-0002-Handle-SMIME_crlf_copy-return-code.patch?h=jammy-sru&id=04ef023920ab08fba214817523fba897527dfff0

  === Original description ===

  https://github.com/openssl/openssl/pull/18876

  The CMS_dataFinal result is important as signature may fail, however, it
  is ignored while returning success from CMS_final.

  Please add this fix to The openssl 3.0.2 "Jammy Jellyfish (supported)"

  Thanks

  Upstream commit:

  ```
  commit 67c0460b89cc1b0644a1a59af78284dfd8d720af
  Author: Alon Bar-Lev <alon.barlev at gmail.com>
  Date:   Tue Jul 26 15:17:06 2022 +0300

      Handle SMIME_crlf_copy return code

      Currently the SMIME_crlf_copy result is ignored in all usages. It does
      return failure when memory allocation fails.

      This patch handles the SMIME_crlf_copy return code in all
  occurrences.

      Signed-off-by: Alon Bar-Lev <alon.barlev at gmail.com>

      Reviewed-by: Tomas Mraz <tomas at openssl.org>
      Reviewed-by: Paul Dale <pauli at openssl.org>
      Reviewed-by: Hugo Landau <hlandau at openssl.org>
      (Merged from https://github.com/openssl/openssl/pull/18876)
  ```

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