Your package is failing to build using OpenSSL 3.0 with the
following error:

| gcc -DHAVE_CONFIG_H -I. -I..   -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -Wextra --std=gnu99 -I../lib/ccan/ -Werror -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -c -o sbsign-sbsign.o `test -f 'sbsign.c' || echo './'`sbsign.c
| sbsign.c: In function ‘main’:
| sbsign.c:234:9: error: ‘ERR_load_BIO_strings’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
|   234 |         ERR_load_BIO_strings();
|       |         ^~~~~~~~~~~~~~~~~~~~
| In file included from /usr/include/openssl/cryptoerr.h:17,
|                  from /usr/include/openssl/crypto.h:38,
|                  from /usr/include/openssl/bio.h:30,
|                  from /usr/include/openssl/conf.h:24,
|                  from sbsign.c:45:
| /usr/include/openssl/cryptoerr_legacy.h:31:27: note: declared here
|    31 | OSSL_DEPRECATEDIN_3_0 int ERR_load_BIO_strings(void);
|       |                           ^~~~~~~~~~~~~~~~~~~~
| cc1: all warnings being treated as errors
| make[3]: *** [Makefile:693: sbsign-sbsign.o] Error 1

For more information see:
https://www.openssl.org/docs/man3.0/man7/migration_guide.html

Sebastian

Ubuntu has the patches to fix this and another OpenSSL 3.0 error.
I have attached the debdiff that I have just uploaded to DELAYED/10.

Thanks Bastian!

We believe that the bug you reported is fixed in the latest version of
sbsigntool, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1006575@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Bastian Germann <bage@debian.org> (supplier of updated sbsigntool package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 04 Jun 2022 11:37:27 +0000
Source: sbsigntool
Architecture: source
Version: 0.9.4-3.1
Distribution: unstable
Urgency: medium
Maintainer: Debian EFI Team <debian-efi@lists.debian.org>
Changed-By: Bastian Germann <bage@debian.org>
Closes: 1006575
Changes:
 sbsigntool (0.9.4-3.1) unstable; urgency=medium
 .
   * Non-maintainer upload
 .
   [ Simon Chopin ]
   * Disable -Werror on deprecation warnings for the OpenSSL transition
     (Closes: #1006575)
   * Apply patch to fix the OpenSSL3 build (LP: #1946193)
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 5a5748eaba65e50d18898b56c48563d73fbe8870 8784 sbsigntool_0.9.4-3.1.debian.tar.xz
 50f4a1daa9437f5b22394d83eda3f06e0c400e1f 6145 sbsigntool_0.9.4-3.1_source.buildinfo
Checksums-Sha256:
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 4ca67de7dbda322c5538b93cfcb70010e3c23d408b1afd6d426effd6d7a68fb0 8784 sbsigntool_0.9.4-3.1.debian.tar.xz
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Files:
 45cce2cc86b2b2bd52e7574e861ecfa7 1846 utils optional sbsigntool_0.9.4-3.1.dsc
 57094878f8554cb897bb2c70fad5e7c6 8784 utils optional sbsigntool_0.9.4-3.1.debian.tar.xz
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