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gpg: Add option --assert-pubkey_algo.

Browse source 
* g10/keyid.c (parse_one_algo_string): New.
(compare_pubkey_string_part): New.
(compare_pubkey_string): New.
* g10/verify.c (check_assert_signer_list): New.
* g10/mainproc.c (check_sig_and_print): Call check_assert_pubkey_algo.
* g10/options.h (opt): Add field assert_pubkey_algos.
* g10/gpg.c (oAssertPubkeyAlgo): New.
(opts): Add "--assert-pubkey_algo".
(assert_pubkey_algo_false): New.
(main): Parse option.
(g10_exit): Reorder RC modifications.  Check assert_pubkey_algo_false.
* common/status.h (ASSERT_PUBKEY_ALGOS): new.
* common/t-support.h (LEAN_T_SUPPORT): Use a simplified version if
this macro is set.

* g10/gpgv.c (oAssertPubkeyAlgo): New.
(opts): Add "--assert-pubkey_algo".
(assert_pubkey_algo_false): New.
(main): Parse option.
(g10_exit): Check assert_pubkey_algo_false.

* g10/t-keyid.c: New.
* g10/Makefile.am: Add t-keyid.
* g10/test-stubs.c: Add assert_pubkey_algos and assert_signer_list and
remove from other tests.
(check_assert_signer_list): Ditto.
(check_assert_pubkey_algo): Ditto.
--

GnuPG-bug-id: 6946
This commit is contained in:
Werner Koch 2024-02-10 14:24:50 +01:00
parent 5842eee805
commit 302afcb6f6
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
20 changed files with 424 additions and 58 deletions
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33
g10/verify.c
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@ -333,7 +333,7 @@ check_assert_signer_list (const char *mainpkhex, const char *pkhex)
assert_signer_true = 1;
write_status_text (STATUS_ASSERT_SIGNER, item->d);
if (!opt.quiet)
log_info ("signer '%s' matched\n", item->d);
log_info ("asserted signer '%s'\n", item->d);
goto leave;
}
}
@ -388,7 +388,7 @@ check_assert_signer_list (const char *mainpkhex, const char *pkhex)
assert_signer_true = 1;
write_status_text (STATUS_ASSERT_SIGNER, p);
if (!opt.quiet)
log_info ("signer '%s' matched '%s', line %d\n",
log_info ("asserted signer '%s' (%s:%d)\n",
p, fname, lnr);
goto leave;
}
@ -405,3 +405,32 @@ check_assert_signer_list (const char *mainpkhex, const char *pkhex)
leave:
es_fclose (fp);
}
/* This function shall be called with the signer's public key
* algorithm ALGOSTR iff a signature is fully valid. If the option
* --assert-pubkey-algo is active the functions checks whether the
* signing key's algo is valid according to that list; in this case a
* global flag is set. */
void
check_assert_pubkey_algo (const char *algostr, const char *pkhex)
{
if (!opt.assert_pubkey_algos)
return; /* Nothing to do. */
if (compare_pubkey_string (algostr, opt.assert_pubkey_algos))
{
write_status_strings (STATUS_ASSERT_PUBKEY_ALGO,
pkhex, " 1 ", algostr, NULL);
if (!opt.quiet)
log_info ("asserted signer '%s' with algo %s\n", pkhex, algostr);
}
else
{
if (!opt.quiet)
log_info ("denied signer '%s' with algo %s\n", pkhex, algostr);
assert_pubkey_algo_false = 1;
write_status_strings (STATUS_ASSERT_PUBKEY_ALGO,
pkhex, " 0 ", algostr, NULL);
}
}