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gpg: Don't store formatting fingerprints in the TOFU DB.
* g10/tofu.c (fingerprint_pp): Split this function into... (fingerprint_str): ... this function... (fingerprint_format): ... and this function. (record_binding): Store the unformatted fingerprint in the DB. Only use the formatting fingerprint when displaying a message to the user. (get_trust): Likewise. (show_statistics): Likewise. (tofu_register): Likewise. (tofu_get_validity): Likewise. (tofu_set_policy): Likewise. (tofu_get_policy): Likewise. -- Signed-off-by: Neal H. Walfield <neal@g10code.com>
This commit is contained in:
Neal H. Walfield
parent
06f3eadb22
commit
8ae3946d28
177
g10/tofu.c
177
g10/tofu.c
@ -167,9 +167,56 @@ tofu_cache_dump (struct db *db)
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# define TIME_AGO_UNIT_LARGE_NAME _("month")
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# define TIME_AGO_UNIT_LARGE_NAME_PLURAL _("months")
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#endif
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static char *
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fingerprint_str (const byte *fingerprint_bin)
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{
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char *fingerprint = bin2hex (fingerprint_bin, MAX_FINGERPRINT_LEN, NULL);
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if (! fingerprint)
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log_fatal ("Out of memory.\n");
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return fingerprint;
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}
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/* Pretty print a MAX_FINGERPRINT_LEN-byte binary fingerprint into a
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malloc'd string. */
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static char *
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fingerprint_format (const byte *fingerprint)
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{
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char *fingerprint_pretty;
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int space = (/* The characters and the NUL. */
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2 * MAX_FINGERPRINT_LEN + 1
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/* After every fourth character, we add a space (except
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the last). */
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+ 2 * MAX_FINGERPRINT_LEN / 4 - 1
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/* Half way through we add a second space. */
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+ 1);
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int i;
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int j;
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if (strlen (fingerprint) != 2 * MAX_FINGERPRINT_LEN)
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{
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log_info (_("Fingerprint with unexpected length (%zd chars)\n"),
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strlen (fingerprint));
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return xstrdup (fingerprint);
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}
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fingerprint_pretty = xmalloc (space);
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for (i = 0, j = 0; i < MAX_FINGERPRINT_LEN * 2; i ++)
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{
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if (i && i % 4 == 0)
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fingerprint_pretty[j ++] = ' ';
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if (i == MAX_FINGERPRINT_LEN * 2 / 2)
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fingerprint_pretty[j ++] = ' ';
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fingerprint_pretty[j ++] = fingerprint[i];
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}
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fingerprint_pretty[j ++] = 0;
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assert (j == space);
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return fingerprint_pretty;
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}
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const char *
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tofu_policy_str (enum tofu_policy policy)
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{
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@ -1074,6 +1121,7 @@ static gpg_error_t
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record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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const char *user_id, enum tofu_policy policy, int show_old)
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{
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char *fingerprint_pp = fingerprint_format (fingerprint);
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struct db *db_email = NULL, *db_key = NULL;
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int rc;
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char *err = NULL;
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@ -1132,7 +1180,7 @@ record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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{
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log_debug ("TOFU: Error reading from binding database"
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" (reading policy for <%s, %s>): %s\n",
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fingerprint, email, err);
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fingerprint_pp, email, err);
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sqlite3_free (err);
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}
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}
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@ -1142,12 +1190,12 @@ record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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if (policy_old != TOFU_POLICY_NONE)
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log_debug ("Changing TOFU trust policy for binding <%s, %s>"
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" from %s to %s.\n",
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fingerprint, email,
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fingerprint_pp, email,
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tofu_policy_str (policy_old),
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tofu_policy_str (policy));
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else
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log_debug ("Set TOFU trust policy for binding <%s, %s> to %s.\n",
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fingerprint, email,
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fingerprint_pp, email,
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tofu_policy_str (policy));
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}
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@ -1173,7 +1221,7 @@ record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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{
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log_error (_("error updating TOFU binding database"
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" (inserting <%s, %s> = %s): %s\n"),
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fingerprint, email, tofu_policy_str (policy),
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fingerprint_pp, email, tofu_policy_str (policy),
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err);
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sqlite3_free (err);
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goto out;
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@ -1201,7 +1249,7 @@ record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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{
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log_error (_("error updating TOFU binding database"
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" (inserting <%s, %s>): %s\n"),
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fingerprint, email, err);
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fingerprint_pp, email, err);
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sqlite3_free (err);
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goto out;
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}
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@ -1239,6 +1287,8 @@ record_binding (struct dbs *dbs, const char *fingerprint, const char *email,
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}
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}
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xfree (fingerprint_pp);
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if (rc)
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return gpg_error (GPG_ERR_GENERAL);
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return 0;
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@ -1568,6 +1618,7 @@ static enum tofu_policy
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get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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const char *user_id, int may_ask)
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{
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char *fingerprint_pp;
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struct db *db;
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enum tofu_policy policy;
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char *conflict = NULL;
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@ -1595,38 +1646,33 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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if (! db)
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return _tofu_GET_TRUST_ERROR;
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fingerprint_pp = fingerprint_format (fingerprint);
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policy = get_policy (dbs, fingerprint, email, &conflict);
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if (policy == TOFU_POLICY_AUTO || policy == TOFU_POLICY_NONE)
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/* See if the key is ultimately trusted. If so, we're done. */
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{
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int i, j;
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char keyid[17];
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const char *keyid;
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KEYDB_SEARCH_DESC desc;
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/* We need to convert the fingerprint as a string to a long
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keyid.
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FINGERPRINT has the form:
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FINGERPRINT is stored as follows:
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362D 3527 F53A AD19 71AA FDE6 5885 9975 EE37 CF96
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-------------------
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362D3527F53AAD1971AAFDE658859975EE37CF96
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-------------------
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The last 16 characters are the long keyid.
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*/
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assert (strlen (fingerprint) > 4 * 4 + 3);
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for (i = strlen (fingerprint) - (4 * 4 + 3), j = 0; j < 16; i ++, j ++)
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{
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if (fingerprint[i] == ' ')
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i ++;
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keyid[j] = fingerprint[i];
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}
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keyid[j] = 0;
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assert (strlen (fingerprint) > 4 * 4);
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keyid = &fingerprint[strlen (fingerprint) - 16];
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rc = classify_user_id (keyid, &desc, 1);
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if (rc || desc.mode != KEYDB_SEARCH_MODE_LONG_KID)
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{
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log_error (_("'%s' is not a valid long keyID\n"), keyid);
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return _tofu_GET_TRUST_ERROR;
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goto out;
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}
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if (tdb_keyid_is_utk (desc.u.kid))
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@ -1653,7 +1699,7 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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policy = opt.tofu_default_policy;
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if (DBG_TRUST)
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log_debug ("TOFU: binding <%s, %s>'s policy is auto (default: %s).\n",
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fingerprint, email,
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fingerprint_pp, email,
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tofu_policy_str (opt.tofu_default_policy));
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}
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switch (policy)
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@ -1666,7 +1712,7 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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We don't need to ask the user anything. */
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if (DBG_TRUST)
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log_debug ("TOFU: Known binding <%s, %s>'s policy: %s\n",
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fingerprint, email, tofu_policy_str (policy));
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fingerprint_pp, email, tofu_policy_str (policy));
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trust_level = tofu_policy_to_trust_level (policy);
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goto out;
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@ -1745,7 +1791,7 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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if (DBG_TRUST)
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log_debug ("TOFU: New binding <%s, %s>, no conflict.\n",
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email, fingerprint);
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email, fingerprint_pp);
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if (record_binding (dbs, fingerprint, email, user_id,
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TOFU_POLICY_AUTO, 0) != 0)
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@ -1814,7 +1860,7 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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if (! fp)
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log_fatal ("Error creating memory stream\n");
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binding = xasprintf ("<%s, %s>", fingerprint, email);
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binding = xasprintf ("<%s, %s>", fingerprint_pp, email);
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binding_shown = 0;
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if (policy == TOFU_POLICY_NONE)
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@ -1827,11 +1873,13 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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display this message. */
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&& conflict && strcmp (conflict, fingerprint) != 0)
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{
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char *conflict_pp = fingerprint_format (conflict);
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es_fprintf (fp,
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_("The key %s raised a conflict with this binding (%s)."
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" Since this binding's policy was 'auto', it was"
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"changed to 'ask'. "),
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conflict, binding);
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conflict_pp, binding);
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xfree (conflict_pp);
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binding_shown = 1;
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}
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es_fprintf (fp,
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@ -1979,13 +2027,16 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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if (! key || strcmp (key, stats_iter->fingerprint) != 0)
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{
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int this_key;
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char *key_pp;
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key = stats_iter->fingerprint;
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this_key = strcmp (key, fingerprint) == 0;
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key_pp = fingerprint_format (key);
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if (this_key)
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es_fprintf (fp, _(" %s (this key):"), key);
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es_fprintf (fp, _(" %s (this key):"), key_pp);
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else
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es_fprintf (fp, _(" %s (policy: %s):"),
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key, tofu_policy_str (stats_iter->policy));
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key_pp, tofu_policy_str (stats_iter->policy));
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xfree (key_pp);
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es_fprintf (fp, "\n");
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}
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@ -2128,6 +2179,7 @@ get_trust (struct dbs *dbs, const char *fingerprint, const char *email,
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xfree (conflict);
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free_strlist (bindings_with_this_email);
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xfree (fingerprint_pp);
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return trust_level;
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}
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@ -2138,6 +2190,7 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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const char *sig_exclude)
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{
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struct db *db;
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char *fingerprint_pp;
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int rc;
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strlist_t strlist = NULL;
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char *err = NULL;
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@ -2146,6 +2199,8 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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if (! db)
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return;
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fingerprint_pp = fingerprint_format (fingerprint);
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rc = sqlite3_exec_printf
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(db->db, strings_collect_cb, &strlist, &err,
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"select count (*), strftime('%%s','now') - min (signatures.time)\n"
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@ -2169,7 +2224,7 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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if (! strlist)
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log_info (_("Have never verified a message signed by key %s!\n"),
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fingerprint);
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fingerprint_pp);
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else
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{
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char *tail = NULL;
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@ -2206,8 +2261,8 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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}
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if (messages == -1 || first_seen_ago == 0)
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log_info (_("Failed to collect signature statistics for \"%s\" (key %s)\n"),
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user_id, fingerprint);
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log_info (_("Failed to collect signature statistics for \"%s\" (key %s)\n"),
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user_id, fingerprint_pp);
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else
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{
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enum tofu_policy policy = get_policy (dbs, fingerprint, email, NULL);
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@ -2219,10 +2274,10 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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log_fatal ("error creating memory stream\n");
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if (messages == 0)
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es_fprintf (fp,
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_("Verified 0 messages signed by \"%s\""
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" (key: %s, policy %s)."),
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user_id, fingerprint, tofu_policy_str (policy));
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es_fprintf (fp,
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_("Verified 0 messages signed by \"%s\""
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" (key: %s, policy %s)."),
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user_id, fingerprint_pp, tofu_policy_str (policy));
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else
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{
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int years = 0;
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@ -2244,7 +2299,7 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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_("Verified %ld messages signed by \"%s\""
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" (key: %s, policy: %s) in the past "),
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messages, user_id,
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fingerprint, tofu_policy_str (policy));
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fingerprint_pp, tofu_policy_str (policy));
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/* It would be nice to use a macro to do this, but gettext
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works on the unpreprocessed code. */
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@ -2402,6 +2457,7 @@ show_statistics (struct dbs *dbs, const char *fingerprint,
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out:
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free_strlist (strlist);
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xfree (fingerprint_pp);
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return;
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}
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@ -2422,42 +2478,6 @@ email_from_user_id (const char *user_id)
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return email;
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}
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/* Pretty print a MAX_FINGERPRINT_LEN-byte binary fingerprint into a
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malloc'd string. */
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static char *
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fingerprint_pp (const byte *fingerprint_bin)
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{
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char fingerprint[MAX_FINGERPRINT_LEN * 2 + 1];
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char *fingerprint_pretty;
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int space = (/* The characters and the NUL. */
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sizeof (fingerprint)
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/* After every fourth character, we add a space (except
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the last). */
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+ (sizeof (fingerprint) - 1) / 4 - 1
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/* Half way through we add a second space. */
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+ 1);
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int i;
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int j;
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bin2hex (fingerprint_bin, MAX_FINGERPRINT_LEN, fingerprint);
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fingerprint_pretty = xmalloc (space);
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for (i = 0, j = 0; i < MAX_FINGERPRINT_LEN * 2; i ++)
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{
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if (i && i % 4 == 0)
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fingerprint_pretty[j ++] = ' ';
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if (i == MAX_FINGERPRINT_LEN * 2 / 2)
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fingerprint_pretty[j ++] = ' ';
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fingerprint_pretty[j ++] = fingerprint[i];
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}
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fingerprint_pretty[j ++] = 0;
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assert (j == space);
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return fingerprint_pretty;
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}
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/* Register the signature with the binding <FINGERPRINT_BIN, USER_ID>.
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FINGERPRINT must be MAX_FINGERPRINT_LEN bytes long.
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@ -2485,6 +2505,7 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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struct dbs *dbs;
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struct db *db;
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char *fingerprint = NULL;
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char *fingerprint_pp = NULL;
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char *email = NULL;
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char *err = NULL;
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int rc;
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@ -2502,7 +2523,8 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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goto die;
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}
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fingerprint = fingerprint_pp (fingerprint_bin);
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fingerprint = fingerprint_str (fingerprint_bin);
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fingerprint_pp = fingerprint_format (fingerprint);
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if (! *user_id)
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{
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@ -2568,7 +2590,7 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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log_debug ("SIGNATURES DB contains duplicate records"
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" <key: %s, %s, time: 0x%lx, sig: %s, %s>."
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" Please report.\n",
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fingerprint, email, (unsigned long) sig_time,
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fingerprint_pp, email, (unsigned long) sig_time,
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sig_digest, origin);
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else if (c == 1)
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{
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@ -2576,7 +2598,7 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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if (DBG_TRUST)
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log_debug ("Already observed the signature"
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" <key: %s, %s, time: 0x%lx, sig: %s, %s>\n",
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fingerprint, email, (unsigned long) sig_time,
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fingerprint_pp, email, (unsigned long) sig_time,
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sig_digest, origin);
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}
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else
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@ -2585,7 +2607,7 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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{
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if (DBG_TRUST)
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log_debug ("TOFU: Saving signature <%s, %s, %s>\n",
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fingerprint, email, sig_digest);
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fingerprint_pp, email, sig_digest);
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assert (c == 0);
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@ -2631,6 +2653,7 @@ tofu_register (const byte *fingerprint_bin, const char *user_id,
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already_verified ? NULL : sig_digest);
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xfree (email);
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xfree (fingerprint_pp);
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xfree (fingerprint);
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if (dbs)
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closedbs (dbs);
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@ -2715,7 +2738,7 @@ tofu_get_validity (const byte *fingerprint_bin, const char *user_id,
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goto die;
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}
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fingerprint = fingerprint_pp (fingerprint_bin);
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fingerprint = fingerprint_str (fingerprint_bin);
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if (! *user_id)
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{
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@ -2778,7 +2801,7 @@ tofu_set_policy (kbnode_t kb, enum tofu_policy policy)
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fingerprint_from_pk (pk, fingerprint_bin, &fingerprint_bin_len);
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assert (fingerprint_bin_len == sizeof (fingerprint_bin));
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fingerprint = fingerprint_pp (fingerprint_bin);
|
||||
fingerprint = fingerprint_str (fingerprint_bin);
|
||||
|
||||
for (; kb; kb = kb->next)
|
||||
{
|
||||
@ -2855,7 +2878,7 @@ tofu_get_policy (PKT_public_key *pk, PKT_user_id *user_id,
|
||||
fingerprint_from_pk (pk, fingerprint_bin, &fingerprint_bin_len);
|
||||
assert (fingerprint_bin_len == sizeof (fingerprint_bin));
|
||||
|
||||
fingerprint = fingerprint_pp (fingerprint_bin);
|
||||
fingerprint = fingerprint_str (fingerprint_bin);
|
||||
|
||||
email = email_from_user_id (user_id->name);
|
||||
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user