X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/b8790eaafd4ed0be8ab280581dedd3ff81ba752b..4860ab5af538fd20c7e92e01b883dbbc556863a5:/keydb_fs.c?ds=sidebyside diff --git a/keydb_fs.c b/keydb_fs.c index 0dc9de5..ea09c7c 100644 --- a/keydb_fs.c +++ b/keydb_fs.c @@ -1,9 +1,20 @@ /* - * keydb.h - Routines to store and fetch keys. + * keydb_fs.c - Routines to store and fetch keys in a filesystem hierarchy. * - * Daniel Silverstone + * Copyright 2004 Daniel Silverstone * - * Copyright 2004 Daniel Silverstone and Project Purple + * This program is free software: you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 51 + * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include @@ -30,6 +41,11 @@ #include "log.h" #include "wordlist.h" +/* Hack: We should really dynamically allocate our path buffers */ +#ifndef PATH_MAX +#define PATH_MAX 1024 +#endif + static int keydb_lockfile_fd = -1; static bool keydb_lockfile_readonly; @@ -54,19 +70,19 @@ static uint32_t calchash(uint8_t * ptr) } -static void keypath(char *buffer, uint64_t _keyid) +static void keypath(char *buffer, size_t length, uint64_t _keyid) { uint64_t keyid = _keyid << 32; - snprintf(buffer, PATH_MAX, "%s/key/%02X/%02X/%08X/%016" PRIX64, + snprintf(buffer, length, "%s/key/%02X/%02X/%08X/%016" PRIX64, config.db_dir, (uint8_t) ((keyid >> 56) & 0xFF), (uint8_t) ((keyid >> 48) & 0xFF), (uint32_t) (keyid >> 32), _keyid); } -static void keydir(char *buffer, uint64_t _keyid) +static void keydir(char *buffer, size_t length, uint64_t _keyid) { uint64_t keyid = _keyid << 32; - snprintf(buffer, PATH_MAX, "%s/key/%02X/%02X/%08X", config.db_dir, + snprintf(buffer, length, "%s/key/%02X/%02X/%08X", config.db_dir, (uint8_t) ((keyid >> 56) & 0xFF), (uint8_t) ((keyid >> 48) & 0xFF), (uint32_t) (keyid >> 32)); @@ -74,42 +90,46 @@ static void keydir(char *buffer, uint64_t _keyid) static void prove_path_to(uint64_t keyid, char *what) { - static char buffer[1024]; - snprintf(buffer, PATH_MAX, "%s/%s", config.db_dir, what); + static char buffer[PATH_MAX]; + snprintf(buffer, sizeof(buffer), "%s/%s", config.db_dir, what); mkdir(buffer, 0777); - snprintf(buffer, PATH_MAX, "%s/%s/%02X", config.db_dir, what, + snprintf(buffer, sizeof(buffer), "%s/%s/%02X", config.db_dir, what, (uint8_t) ((keyid >> 24) & 0xFF)); mkdir(buffer, 0777); - snprintf(buffer, PATH_MAX, "%s/%s/%02X/%02X", config.db_dir, what, + snprintf(buffer, sizeof(buffer), "%s/%s/%02X/%02X", config.db_dir, + what, (uint8_t) ((keyid >> 24) & 0xFF), (uint8_t) ((keyid >> 16) & 0xFF)); mkdir(buffer, 0777); - snprintf(buffer, PATH_MAX, "%s/%s/%02X/%02X/%08X", config.db_dir, what, + snprintf(buffer, sizeof(buffer), "%s/%s/%02X/%02X/%08X", config.db_dir, + what, (uint8_t) ((keyid >> 24) & 0xFF), (uint8_t) ((keyid >> 16) & 0xFF), (uint32_t) (keyid)); mkdir(buffer, 0777); } -static void wordpath(char *buffer, char *word, uint32_t hash, uint64_t keyid) +static void wordpath(char *buffer, size_t length, char *word, uint32_t hash, + uint64_t keyid) { - snprintf(buffer, PATH_MAX, "%s/words/%02X/%02X/%08X/%s/%016" PRIX64, + snprintf(buffer, length, "%s/words/%02X/%02X/%08X/%s/%016" PRIX64, config.db_dir, (uint8_t) ((hash >> 24) & 0xFF), (uint8_t) ((hash >> 16) & 0xFF), hash, word, keyid); } -static void worddir(char *buffer, char *word, uint32_t hash) +static void worddir(char *buffer, size_t length, char *word, uint32_t hash) { - snprintf(buffer, PATH_MAX, "%s/words/%02X/%02X/%08X/%s", config.db_dir, + snprintf(buffer, length, "%s/words/%02X/%02X/%08X/%s", config.db_dir, (uint8_t) ((hash >> 24) & 0xFF), (uint8_t) ((hash >> 16) & 0xFF), hash, word); } -static void subkeypath(char *buffer, uint64_t subkey, uint64_t keyid) +static void subkeypath(char *buffer, size_t length, uint64_t subkey, + uint64_t keyid) { - snprintf(buffer, PATH_MAX, "%s/subkeys/%02X/%02X/%08X/%016" PRIX64, + snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X/%016" PRIX64, config.db_dir, (uint8_t) ((subkey >> 24) & 0xFF), (uint8_t) ((subkey >> 16) & 0xFF), @@ -117,9 +137,22 @@ static void subkeypath(char *buffer, uint64_t subkey, uint64_t keyid) keyid); } -static void subkeydir(char *buffer, uint64_t subkey) +static void skshashpath(char *buffer, size_t length, + const struct skshash *hash) { - snprintf(buffer, PATH_MAX, "%s/subkeys/%02X/%02X/%08X", + snprintf(buffer, length, "%s/skshash/%02X/%02X/%02X%02X%02X%02X/" + "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", + config.db_dir, + hash->hash[0], hash->hash[1], + hash->hash[0], hash->hash[1], hash->hash[2], hash->hash[3], + hash->hash[4], hash->hash[5], hash->hash[6], hash->hash[7], + hash->hash[8], hash->hash[9], hash->hash[10], hash->hash[11], + hash->hash[12], hash->hash[13], hash->hash[14], + hash->hash[15]); +} +static void subkeydir(char *buffer, size_t length, uint64_t subkey) +{ + snprintf(buffer, length, "%s/subkeys/%02X/%02X/%08X", config.db_dir, (uint8_t) ((subkey >> 24) & 0xFF), (uint8_t) ((subkey >> 16) & 0xFF), @@ -137,7 +170,7 @@ static void fs_initdb(bool readonly) keydb_lockfile_readonly = readonly; - snprintf(buffer, PATH_MAX, "%s/.lock", config.db_dir); + snprintf(buffer, sizeof(buffer), "%s/.lock", config.db_dir); if (access(config.db_dir, R_OK | W_OK | X_OK) == -1) { if (errno != ENOENT) { @@ -208,6 +241,44 @@ static void fs_endtrans(void) fcntl(keydb_lockfile_fd, F_SETLK, &lockstruct); } +static uint64_t fs_getfullkeyid(uint64_t keyid) +{ + static char buffer[PATH_MAX]; + DIR *d = NULL; + struct dirent *de = NULL; + uint64_t ret = 0; + + keydir(buffer, sizeof(buffer), keyid); + + d = opendir(buffer); + if (d) { + do { + de = readdir(d); + if (de && de->d_name[0] != '.') { + ret = strtoull(de->d_name, NULL, 16); + } + } while (de && de->d_name[0] == '.'); + closedir(d); + } + + if (ret == 0) { + subkeydir(buffer, sizeof(buffer), keyid); + + d = opendir(buffer); + if (d) { + do { + de = readdir(d); + if (de && de->d_name[0] != '.') { + ret = strtoull(de->d_name, NULL, 16); + } + } while (de && de->d_name[0] == '.'); + closedir(d); + } + } + + return ret; +} + /** * fetch_key - Given a keyid fetch the key from storage. * @keyid: The keyid to fetch. @@ -222,12 +293,12 @@ static int fs_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, struct openpgp_packet_list *packets = NULL; if (!intrans) - starttrans(); + fs_starttrans(); if ((keyid >> 32) == 0) - keyid = getfullkeyid(keyid); + keyid = fs_getfullkeyid(keyid); - keypath(buffer, keyid); + keypath(buffer, sizeof(buffer), keyid); if ((fd = open(buffer, O_RDONLY)) != -1) { /* File is present, load it in... */ read_openpgp_stream(file_fetchchar, &fd, &packets, 0); @@ -239,7 +310,7 @@ static int fs_fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, } if (!intrans) - endtrans(); + fs_endtrans(); return ret; } @@ -260,15 +331,17 @@ static int fs_store_key(struct openpgp_publickey *publickey, bool intrans, struct openpgp_publickey *next = NULL; uint64_t keyid = get_keyid(publickey); struct ll *wordlist = NULL, *wl = NULL; + struct skshash hash; uint64_t *subkeyids = NULL; + uint32_t hashid; int i = 0; if (!intrans) - starttrans(); + fs_starttrans(); prove_path_to(keyid, "key"); - keypath(buffer, keyid); + keypath(buffer, sizeof(buffer), keyid); if ((fd = open(buffer, O_WRONLY | (update ? O_TRUNC : O_CREAT), @@ -291,9 +364,10 @@ static int fs_store_key(struct openpgp_publickey *publickey, bool intrans, uint32_t hash = calchash((uint8_t *) (wl->object)); prove_path_to(hash, "words"); - worddir(wbuffer, wl->object, hash); + worddir(wbuffer, sizeof(wbuffer), wl->object, hash); mkdir(wbuffer, 0777); - wordpath(wbuffer, wl->object, hash, keyid); + wordpath(wbuffer, sizeof(wbuffer), wl->object, hash, + keyid); link(buffer, wbuffer); wl = wl->next; @@ -305,9 +379,10 @@ static int fs_store_key(struct openpgp_publickey *publickey, bool intrans, while (subkeyids != NULL && subkeyids[i] != 0) { prove_path_to(subkeyids[i], "subkeys"); - subkeydir(wbuffer, subkeyids[i]); + subkeydir(wbuffer, sizeof(wbuffer), subkeyids[i]); mkdir(wbuffer, 0777); - subkeypath(wbuffer, subkeyids[i], keyid); + subkeypath(wbuffer, sizeof(wbuffer), subkeyids[i], + keyid); link(buffer, wbuffer); i++; @@ -316,10 +391,17 @@ static int fs_store_key(struct openpgp_publickey *publickey, bool intrans, free(subkeyids); subkeyids = NULL; } + + get_skshash(publickey, &hash); + hashid = (hash.hash[0] << 24) + (hash.hash[1] << 16) + + (hash.hash[2] << 8) + hash.hash[3]; + prove_path_to(hashid, "skshash"); + skshashpath(wbuffer, sizeof(wbuffer), &hash); + link(buffer, wbuffer); } if (!intrans) - endtrans(); + fs_endtrans(); return ret; } @@ -333,17 +415,18 @@ static int fs_delete_key(uint64_t keyid, bool intrans) static char buffer[PATH_MAX]; int ret; struct openpgp_publickey *pk = NULL; + struct skshash hash; struct ll *wordlist = NULL, *wl = NULL; uint64_t *subkeyids = NULL; int i = 0; if ((keyid >> 32) == 0) - keyid = getfullkeyid(keyid); + keyid = fs_getfullkeyid(keyid); if (!intrans) - starttrans(); + fs_starttrans(); - ret = fetch_key(keyid, &pk, true); + ret = fs_fetch_key(keyid, &pk, true); if (ret) { logthing(LOGTHING_DEBUG, "Wordlist for key %016" PRIX64, @@ -355,7 +438,8 @@ static int fs_delete_key(uint64_t keyid, bool intrans) uint32_t hash = calchash((uint8_t *) (wl->object)); prove_path_to(hash, "words"); - wordpath(buffer, wl->object, hash, keyid); + wordpath(buffer, sizeof(buffer), wl->object, hash, + keyid); unlink(buffer); wl = wl->next; @@ -366,7 +450,8 @@ static int fs_delete_key(uint64_t keyid, bool intrans) while (subkeyids != NULL && subkeyids[i] != 0) { prove_path_to(subkeyids[i], "subkeys"); - subkeypath(buffer, subkeyids[i], keyid); + subkeypath(buffer, sizeof(buffer), subkeyids[i], + keyid); unlink(buffer); i++; @@ -376,13 +461,16 @@ static int fs_delete_key(uint64_t keyid, bool intrans) subkeyids = NULL; } + get_skshash(pk, &hash); + skshashpath(buffer, sizeof(buffer), &hash); + unlink(buffer); } - keypath(buffer, keyid); + keypath(buffer, sizeof(buffer), keyid); unlink(buffer); if (!intrans) - endtrans(); + fs_endtrans(); return 1; } @@ -394,7 +482,7 @@ static struct ll *internal_get_key_by_word(char *word, struct ll *mct) uint32_t hash = calchash((uint8_t *) (word)); struct dirent *de; - worddir(buffer, word, hash); + worddir(buffer, sizeof(buffer), word, hash); d = opendir(buffer); logthing(LOGTHING_DEBUG, "Scanning for word %s in dir %s", word, buffer); @@ -471,7 +559,7 @@ static int fs_fetch_key_text(const char *search, while (wl) { logthing(LOGTHING_DEBUG, "Adding key: %s", wl->object); addedkeys += - fetch_key(strtoull(wl->object, NULL, 16), publickey, + fs_fetch_key(strtoull(wl->object, NULL, 16), publickey, false); if (addedkeys >= config.maxkeys) break; @@ -485,41 +573,29 @@ static int fs_fetch_key_text(const char *search, return addedkeys; } -static uint64_t fs_getfullkeyid(uint64_t keyid) +/** + * fetch_key_skshash - Given an SKS hash fetch the key from storage. + * @hash: The hash to fetch. + * @publickey: A pointer to a structure to return the key in. + * @intrans: If we're already in a transaction. + */ +static int fs_fetch_key_skshash(const struct skshash *hash, + struct openpgp_publickey **publickey) { static char buffer[PATH_MAX]; - DIR *d = NULL; - struct dirent *de = NULL; - uint64_t ret = 0; - - keydir(buffer, keyid); + int ret = 0, fd; + struct openpgp_packet_list *packets = NULL; - d = opendir(buffer); - if (d) { - do { - de = readdir(d); - if (de && de->d_name[0] != '.') { - ret = strtoull(de->d_name, NULL, 16); - } - } while (de && de->d_name[0] == '.'); - closedir(d); + skshashpath(buffer, sizeof(buffer), hash); + if ((fd = open(buffer, O_RDONLY)) != -1) { + read_openpgp_stream(file_fetchchar, &fd, &packets, 0); + parse_keys(packets, publickey); + free_packet_list(packets); + packets = NULL; + close(fd); + ret = 1; } - if (ret == 0) { - subkeydir(buffer, keyid); - - d = opendir(buffer); - if (d) { - do { - de = readdir(d); - if (de && de->d_name[0] != '.') { - ret = strtoull(de->d_name, NULL, 16); - } - } while (de && de->d_name[0] == '.'); - closedir(d); - } - } - return ret; } @@ -555,6 +631,7 @@ struct dbfuncs keydb_fs_funcs = { .endtrans = fs_endtrans, .fetch_key = fs_fetch_key, .fetch_key_text = fs_fetch_key_text, + .fetch_key_skshash = fs_fetch_key_skshash, .store_key = fs_store_key, .update_keys = generic_update_keys, .delete_key = fs_delete_key,