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gpg: Collapse duplicate subkeys.
* g10/options.h (IMPORT_COLLAPSE_UIDS): New. (IMPORT_COLLAPSE_SUBKEYS): New. * g10/gpg.c (main): Make them the default. * g10/import.c (parse_import_options): New import options "no-collapse-uids" and "no-collapse_subkeys". (collapse_subkeys): New. (import_one_real): Collapse subkeys and allow disabling the collapsing using the new options. (read_key_from_file_or_buffer): Always collapse subkeys. * g10/keyedit.c (fix_keyblock): Call collapse_subkeys. -- GnuPG-bug-id: 4421 Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch
parent
96e15051ba
commit
633c1fea5f
@ -2391,11 +2391,15 @@ main (int argc, char **argv)
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opt.max_cert_depth = 5;
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opt.escape_from = 1;
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opt.flags.require_cross_cert = 1;
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opt.import_options = IMPORT_REPAIR_KEYS;
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opt.import_options = (IMPORT_REPAIR_KEYS
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| IMPORT_COLLAPSE_UIDS
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| IMPORT_COLLAPSE_SUBKEYS);
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opt.export_options = EXPORT_ATTRIBUTES;
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opt.keyserver_options.import_options = (IMPORT_REPAIR_KEYS
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| IMPORT_REPAIR_PKS_SUBKEY_BUG
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| IMPORT_SELF_SIGS_ONLY
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| IMPORT_COLLAPSE_UIDS
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| IMPORT_COLLAPSE_SUBKEYS
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| IMPORT_CLEAN);
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opt.keyserver_options.export_options = EXPORT_ATTRIBUTES;
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opt.keyserver_options.options = KEYSERVER_HONOR_PKA_RECORD;
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124
g10/import.c
124
g10/import.c
@ -210,6 +210,11 @@ parse_import_options(char *str,unsigned int *options,int noisy)
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{"show-only", (IMPORT_SHOW | IMPORT_DRY_RUN), NULL,
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NULL},
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/* Hidden options which are enabled by default and are provided
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* in case of problems with the respective implementation. */
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{"collapse-uids", IMPORT_COLLAPSE_UIDS, NULL, NULL},
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{"collapse-subkeys", IMPORT_COLLAPSE_SUBKEYS, NULL, NULL},
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/* Aliases for backward compatibility */
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{"allow-local-sigs",IMPORT_LOCAL_SIGS,NULL,NULL},
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{"repair-hkp-subkey-bug",IMPORT_REPAIR_PKS_SUBKEY_BUG,NULL,NULL},
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@ -403,7 +408,10 @@ read_key_from_file_or_buffer (ctrl_t ctrl, const char *fname,
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goto leave;
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}
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/* We do the collapsing unconditionally although it is expected that
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* clean keys are provided here. */
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collapse_uids (&keyblock);
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collapse_subkeys (&keyblock);
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clear_kbnode_flags (keyblock);
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if (chk_self_sigs (ctrl, keyblock, keyid, &non_self))
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@ -1947,9 +1955,12 @@ import_one_real (ctrl_t ctrl,
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/* Remove or collapse the user ids. */
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if ((options & IMPORT_DROP_UIDS))
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remove_all_uids (&keyblock);
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else
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else if ((options & IMPORT_COLLAPSE_UIDS))
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collapse_uids (&keyblock);
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if ((options & IMPORT_COLLAPSE_SUBKEYS))
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collapse_subkeys (&keyblock);
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/* Clean the key that we're about to import, to cut down on things
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that we have to clean later. This has no practical impact on the
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end result, but does result in less logging which might confuse
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@ -3010,7 +3021,7 @@ import_secret_one (ctrl_t ctrl, kbnode_t keyblock,
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_("rejected by import screener"));
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release_kbnode (keyblock);
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return 0;
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}
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}
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if (opt.verbose && !for_migration)
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{
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@ -4100,6 +4111,115 @@ collapse_uids (kbnode_t *keyblock)
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}
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/*
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* It may happen that the imported keyblock has duplicated subkeys.
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* We check this here and collapse those subkeys along with their
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* binding self-signatures.
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* Returns: True if the keyblock has changed.
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*/
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int
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collapse_subkeys (kbnode_t *keyblock)
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{
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kbnode_t kb1, kb2, sig1, sig2, last;
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int any = 0;
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log_debug ("enter collapse_subkeys\n");
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for (kb1 = *keyblock; kb1; kb1 = kb1->next)
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{
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if (is_deleted_kbnode (kb1))
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continue;
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if (kb1->pkt->pkttype != PKT_PUBLIC_SUBKEY
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&& kb1->pkt->pkttype != PKT_SECRET_SUBKEY)
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continue;
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/* We assume just a few duplicates and use a straightforward
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* algorithm. */
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for (kb2 = kb1->next; kb2; kb2 = kb2->next)
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{
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if (is_deleted_kbnode (kb2))
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continue;
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if (kb2->pkt->pkttype != PKT_PUBLIC_SUBKEY
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&& kb2->pkt->pkttype != PKT_SECRET_SUBKEY)
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continue;
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if (cmp_public_keys (kb1->pkt->pkt.public_key,
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kb2->pkt->pkt.public_key))
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continue;
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/* We have a duplicated subkey. */
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any = 1;
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/* Take subkey-2's signatures, and attach them to subkey-1. */
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for (last = kb2; last->next; last = last->next)
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{
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if (is_deleted_kbnode (last))
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continue;
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if (last->next->pkt->pkttype != PKT_SIGNATURE)
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break;
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}
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/* Snip out subkye-2 */
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find_prev_kbnode (*keyblock, kb2, 0)->next = last->next;
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/* Put subkey-2 in place as part of subkey-1 */
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last->next = kb1->next;
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kb1->next = kb2;
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delete_kbnode (kb2);
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/* Now dedupe kb1 */
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for (sig1 = kb1->next; sig1; sig1 = sig1->next)
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{
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if (is_deleted_kbnode (sig1))
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continue;
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if (sig1->pkt->pkttype != PKT_SIGNATURE)
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break;
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for (sig2 = sig1->next, last = sig1;
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sig2;
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last = sig2, sig2 = sig2->next)
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{
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if (is_deleted_kbnode (sig2))
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continue;
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if (sig2->pkt->pkttype != PKT_SIGNATURE)
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break;
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if (!cmp_signatures (sig1->pkt->pkt.signature,
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sig2->pkt->pkt.signature))
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{
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/* We have a match, so delete the second
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signature */
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delete_kbnode (sig2);
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sig2 = last;
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}
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}
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}
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}
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}
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commit_kbnode (keyblock);
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log_debug ("leave collapse_subkeys (any=%d)\n", any);
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if (any && !opt.quiet)
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{
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const char *key="???";
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if ((kb1 = find_kbnode (*keyblock, PKT_PUBLIC_KEY)) )
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key = keystr_from_pk (kb1->pkt->pkt.public_key);
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else if ((kb1 = find_kbnode (*keyblock, PKT_SECRET_KEY)) )
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key = keystr_from_pk (kb1->pkt->pkt.public_key);
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log_info (_("key %s: duplicated subkeys detected - merged\n"), key);
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}
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return any;
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}
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/* Check for a 0x20 revocation from a revocation key that is not
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present. This may be called without the benefit of merge_xxxx so
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you can't rely on pk->revkey and friends. */
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@ -1174,6 +1174,8 @@ fix_keyblock (ctrl_t ctrl, kbnode_t *keyblockp)
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if (collapse_uids (keyblockp))
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changed++;
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if (collapse_subkeys (keyblockp))
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changed++;
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if (key_check_all_keysigs (ctrl, 1, *keyblockp, 0, 1))
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changed++;
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reorder_keyblock (*keyblockp);
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@ -394,7 +394,8 @@ gpg_error_t transfer_secret_keys (ctrl_t ctrl, struct import_stats_s *stats,
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kbnode_t sec_keyblock, int batch, int force,
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int only_marked);
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int collapse_uids( KBNODE *keyblock );
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int collapse_uids (kbnode_t *keyblock);
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int collapse_subkeys (kbnode_t *keyblock);
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int get_revocation_reason (PKT_signature *sig, char **r_reason,
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char **r_comment, size_t *r_commentlen);
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@ -369,6 +369,8 @@ EXTERN_UNLESS_MAIN_MODULE int memory_stat_debug_mode;
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#define IMPORT_DRY_RUN (1<<12)
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#define IMPORT_DROP_UIDS (1<<13)
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#define IMPORT_SELF_SIGS_ONLY (1<<14)
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#define IMPORT_COLLAPSE_UIDS (1<<15)
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#define IMPORT_COLLAPSE_SUBKEYS (1<<16)
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#define EXPORT_LOCAL_SIGS (1<<0)
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#define EXPORT_ATTRIBUTES (1<<1)
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