X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/a953676d714ba11d3b9509bbea747ad0858b28ba..b3e534f945ae56605bc5309e7c5af020c797a69b:/keydb_db3.c?ds=inline diff --git a/keydb_db3.c b/keydb_db3.c index 263397a..464dcc9 100644 --- a/keydb_db3.c +++ b/keydb_db3.c @@ -4,8 +4,11 @@ * Jonathan McDowell * * Copyright 2002 Project Purple + * + * $Id: keydb_db3.c,v 1.26 2004/05/27 03:33:24 noodles Exp $ */ +#include #include #include #include @@ -18,169 +21,168 @@ #include +#include "charfuncs.h" #include "keydb.h" #include "keyid.h" -#include "keyindex.h" +#include "decodekey.h" #include "keystructs.h" #include "mem.h" +#include "log.h" #include "onak-conf.h" #include "parsekey.h" +#include "wordlist.h" /** - * dbconn - our connection to the key database. + * dbenv - our database environment. */ -static DB *dbconn = NULL; +static DB_ENV *dbenv = NULL; /** - * worddb - our connection to the word database. + * numdb - The number of database files we have. */ -static DB *worddb = NULL; +static int numdbs = 16; /** - * db3_get_ctx - Shared with CGI buffer stuff... + * dbconn - our connections to the key database files. */ -struct db3_get_ctx { - char *buffer; - int offset; - int size; -}; +static DB **dbconns = NULL; /** - * keydb_fetchchar - Fetches a char from a file. + * worddb - our connection to the word database. */ -static int keydb_fetchchar(void *ctx, size_t count, unsigned char *c) -{ - struct db3_get_ctx *buf = NULL; - int i; - - buf = (struct db3_get_ctx *) ctx; - for (i = 0; i < count; i++) { - c[i] = buf->buffer[buf->offset++]; - } - - return (((buf->offset) == (buf->size)) ? 1 : 0); -} +static DB *worddb = NULL; /** - * keydb_putchar - Puts a char to a file. + * txn - our current transaction id. */ -static int keydb_putchar(void *ctx, size_t count, unsigned char *c) -{ - struct db3_get_ctx *buf = NULL; - size_t newsize = 0; - int i; - - buf = (struct db3_get_ctx *) ctx; +static DB_TXN *txn = NULL; - for (newsize = buf->size; newsize < (buf->offset + count); - newsize *= 2) ; +DB *keydb(uint64_t keyid) +{ + uint64_t keytrun; - if (newsize != buf->size) { - buf->buffer = realloc(buf->buffer, newsize); - buf->size = newsize; - } - - for (i = 0; i < count; i++) { - buf->buffer[buf->offset++] = c[i]; - } + keytrun = keyid >> 8; - return 1; + return(dbconns[keytrun % numdbs]); } /** - * makewordlist - Takes a string and splits it into a set of unique words. - * @wordlist: The current word list. - * @words: The string to split and add. - * - * We take words and split it on non alpha numeric characters. These get - * added to the word list if they're not already present. If the wordlist - * is NULL then we start a new list, otherwise it's search for already - * added words. Note that words is modified in the process of scanning. + * initdb - Initialize the key database. * - * Returns the new word list. + * This function should be called before any of the other functions in + * this file are called in order to allow the DB to be initialized ready + * for access. */ -struct ll *makewordlist(struct ll *wordlist, char *word) +void initdb(bool readonly) { - char *start = NULL; - char *end = NULL; + char buf[1024]; + FILE *numdb = NULL; + int ret = 0; + int i = 0; + u_int32_t flags = 0; - /* - * Walk through the words string, spliting on non alphanumerics and - * then checking if the word already exists in the list. If not then - * we add it. - */ - end = word; - while (end != NULL && *end != 0) { - start = end; - while (*start != 0 && !isalnum(*start)) { - start++; + snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir); + numdb = fopen(buf, "r"); + if (numdb != NULL) { + if (fgets(buf, sizeof(buf), numdb) != NULL) { + numdbs = atoi(buf); } - end = start; - while (*end != 0 && isalnum(*end)) { - *end = tolower(*end); - end++; - } - if (end - start > 1) { - if (*end != 0) { - *end = 0; - end++; - } - - if (llfind(wordlist, start, - strcmp) == NULL) { - wordlist = lladd(wordlist, - start); - } + fclose(numdb); + } else if (!readonly) { + logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s", + strerror(errno)); + numdb = fopen(buf, "w"); + if (numdb != NULL) { + fprintf(numdb, "%d", numdbs); + fclose(numdb); + } else { + logthing(LOGTHING_ERROR, + "Couldn't write num_keydb: %s", + strerror(errno)); } } - return wordlist; -} + dbconns = malloc(sizeof (DB *) * numdbs); + if (dbconns == NULL) { + logthing(LOGTHING_CRITICAL, + "Couldn't allocate memory for dbconns"); + exit(1); + } -/** - * initdb - Initialize the key database. - * - * This function should be called before any of the other functions in - * this file are called in order to allow the DB to be initialized ready - * for access. - */ -void initdb(void) -{ - char buf[1024]; - int ret = 0; + ret = db_env_create(&dbenv, 0); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "db_env_create: %s", db_strerror(ret)); + exit(1); + } - strcpy(buf, config.db2_dbpath); - strcat(buf, "/keydb.db"); - - ret = db_create(&dbconn, NULL, 0); + /* + * Enable deadlock detection so that we don't block indefinitely on + * anything. What we really want is simple 2 state locks, but I'm not + * sure how to make the standard DB functions do that yet. + */ + ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT); if (ret != 0) { - fprintf(stderr, "db_create: %s\n", db_strerror(ret)); + logthing(LOGTHING_CRITICAL, + "db_env_create: %s", db_strerror(ret)); exit(1); } - ret = dbconn->open(dbconn, buf, NULL, DB_HASH, + ret = dbenv->open(dbenv, config.db_dir, + DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK | + DB_INIT_TXN | DB_CREATE, - 0664); + 0); if (ret != 0) { - dbconn->err(dbconn, ret, "%s", buf); + logthing(LOGTHING_CRITICAL, + "Error opening db environment: %s (%s)", + config.db_dir, + db_strerror(ret)); exit(1); } - strcpy(buf, config.db2_dbpath); - strcat(buf, "/worddb"); - - ret = db_create(&worddb, NULL, 0); + for (i = 0; i < numdbs; i++) { + ret = db_create(&dbconns[i], dbenv, 0); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "db_create: %s", db_strerror(ret)); + exit(1); + } + + snprintf(buf, 1023, "keydb.%d.db", i); + flags = DB_CREATE; + if (readonly) { + flags = DB_RDONLY; + } + ret = dbconns[i]->open(dbconns[i], buf, + NULL, + DB_HASH, + flags, + 0664); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "Error opening key database: %s (%s)", + buf, + db_strerror(ret)); + exit(1); + } + } + + ret = db_create(&worddb, dbenv, 0); if (ret != 0) { - fprintf(stderr, "db_create: %s\n", db_strerror(ret)); + logthing(LOGTHING_CRITICAL, "db_create: %s", db_strerror(ret)); exit(1); } ret = worddb->set_flags(worddb, DB_DUP); - ret = worddb->open(worddb, buf, NULL, DB_BTREE, - DB_CREATE, + ret = worddb->open(worddb, "worddb", NULL, DB_BTREE, + flags, 0664); if (ret != 0) { - worddb->err(worddb, ret, "%s", buf); + logthing(LOGTHING_CRITICAL, + "Error opening word database: %s (%s)", + "worddb", + db_strerror(ret)); exit(1); } @@ -195,10 +197,17 @@ void initdb(void) */ void cleanupdb(void) { + int i = 0; + + txn_checkpoint(dbenv, 0, 0, 0); worddb->close(worddb, 0); worddb = NULL; - dbconn->close(dbconn, 0); - dbconn = NULL; + for (i = 0; i < numdbs; i++) { + dbconns[i]->close(dbconns[i], 0); + dbconns[i] = NULL; + } + dbenv->close(dbenv, 0); + dbenv = NULL; } /** @@ -210,6 +219,22 @@ void cleanupdb(void) */ bool starttrans(void) { + int ret; + + assert(dbenv != NULL); + assert(txn == NULL); + + ret = txn_begin(dbenv, + NULL, /* No parent transaction */ + &txn, + 0); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "Error starting transaction: %s", + db_strerror(ret)); + exit(1); + } + return true; } @@ -220,6 +245,21 @@ bool starttrans(void) */ void endtrans(void) { + int ret; + + assert(dbenv != NULL); + assert(txn != NULL); + + ret = txn_commit(txn, + 0); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "Error ending transaction: %s", + db_strerror(ret)); + exit(1); + } + txn = NULL; + return; } @@ -242,7 +282,7 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, DBT key, data; int ret = 0; int numkeys = 0; - struct db3_get_ctx fetchbuf; + struct buffer_ctx fetchbuf; memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); @@ -254,8 +294,12 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, key.data = &keyid; keyid &= 0xFFFFFFFF; - ret = dbconn->get(dbconn, - NULL, /* txn id */ + if (!intrans) { + starttrans(); + } + + ret = keydb(keyid)->get(keydb(keyid), + txn, &key, &data, 0); /* flags*/ @@ -264,17 +308,30 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, fetchbuf.buffer = data.data; fetchbuf.offset = 0; fetchbuf.size = data.size; - read_openpgp_stream(keydb_fetchchar, &fetchbuf, - &packets); + read_openpgp_stream(buffer_fetchchar, &fetchbuf, + &packets, 0); parse_keys(packets, publickey); + free_packet_list(packets); + packets = NULL; numkeys++; } else if (ret != DB_NOTFOUND) { - dbconn->err(dbconn, ret, "Problem retrieving key"); + logthing(LOGTHING_ERROR, + "Problem retrieving key: %s", + db_strerror(ret)); + } + + if (!intrans) { + endtrans(); } return (numkeys); } +int worddb_cmp(const char *d1, const char *d2) +{ + return memcmp(d1, d2, 12); +} + /** * fetch_key_text - Trys to find the keys that contain the supplied text. * @search: The text to search for. @@ -291,39 +348,92 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey) uint64_t keyid; int i; int numkeys; + char *searchtext = NULL; + struct ll *wordlist = NULL; + struct ll *curword = NULL; + struct ll *keylist = NULL; + struct ll *newkeylist = NULL; numkeys = 0; + searchtext = strdup(search); + wordlist = makewordlist(wordlist, searchtext); + + starttrans(); ret = worddb->cursor(worddb, - NULL, /* txn */ + txn, &cursor, 0); /* flags */ - if (ret == 0) { + + for (curword = wordlist; curword != NULL; curword = curword->next) { memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); - key.data = (void *) search; - key.size = strlen(search); + key.data = curword->object; + key.size = strlen(curword->object); + data.flags = DB_DBT_MALLOC; ret = cursor->c_get(cursor, &key, &data, DB_SET); - while (ret == 0 && strcmp(key.data, search) == 0) { + while (ret == 0 && strncmp(key.data, curword->object, + key.size) == 0 && + ((char *) curword->object)[key.size] == 0) { keyid = 0; for (i = 4; i < 12; i++) { keyid <<= 8; - keyid += ((unsigned char *) data.data)[i]; + keyid += ((unsigned char *) + data.data)[i]; + } + + if (keylist == NULL || + llfind(keylist, data.data, + worddb_cmp) != NULL) { + newkeylist = lladd(newkeylist, data.data); + data.data = NULL; + } else { + free(data.data); + data.data = NULL; } - numkeys += fetch_key(keyid, - publickey, - false); ret = cursor->c_get(cursor, &key, &data, DB_NEXT); } - ret = cursor->c_close(cursor); - cursor = NULL; + llfree(keylist, free); + keylist = newkeylist; + newkeylist = NULL; + if (data.data != NULL) { + free(data.data); + data.data = NULL; + } + } + llfree(wordlist, NULL); + wordlist = NULL; + + for (newkeylist = keylist; + newkeylist != NULL && numkeys < config.maxkeys; + newkeylist = newkeylist->next) { + + keyid = 0; + for (i = 4; i < 12; i++) { + keyid <<= 8; + keyid += ((unsigned char *) + newkeylist->object)[i]; + } + + numkeys += fetch_key(keyid, + publickey, + true); } + llfree(keylist, free); + keylist = NULL; + free(searchtext); + searchtext = NULL; + + ret = cursor->c_close(cursor); + cursor = NULL; + + endtrans(); return (numkeys); } @@ -347,7 +457,7 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) struct openpgp_publickey *next = NULL; int ret = 0; int i = 0; - struct db3_get_ctx storebuf; + struct buffer_ctx storebuf; DBT key; DBT data; uint64_t keyid = 0; @@ -356,9 +466,14 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) unsigned char worddb_data[12]; struct ll *wordlist = NULL; struct ll *curword = NULL; + bool deadlock = false; keyid = get_keyid(publickey); + if (!intrans) { + starttrans(); + } + /* * Delete the key if we already have it. * @@ -368,53 +483,71 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) * it definitely needs updated. */ if (update) { - delete_key(keyid, true); + deadlock = (delete_key(keyid, true) == -1); } /* * Convert the key to a flat set of binary data. */ - next = publickey->next; - publickey->next = NULL; - flatten_publickey(publickey, &packets, &list_end); - publickey->next = next; - - storebuf.offset = 0; - storebuf.size = 8192; - storebuf.buffer = malloc(8192); + if (!deadlock) { + next = publickey->next; + publickey->next = NULL; + flatten_publickey(publickey, &packets, &list_end); + publickey->next = next; + + storebuf.offset = 0; + storebuf.size = 8192; + storebuf.buffer = malloc(8192); - write_openpgp_stream(keydb_putchar, &storebuf, packets); + write_openpgp_stream(buffer_putchar, &storebuf, packets); - /* - * Now we have the key data store it in the DB; the keyid is the key. - */ - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - key.data = &keyid; - key.size = sizeof(keyid); - keyid &= 0xFFFFFFFF; - data.size = storebuf.offset; - data.data = storebuf.buffer; + /* + * Now we have the key data store it in the DB; the keyid is + * the key. + */ + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + key.data = &keyid; + key.size = sizeof(keyid); + keyid &= 0xFFFFFFFF; + data.size = storebuf.offset; + data.data = storebuf.buffer; + + ret = keydb(keyid)->put(keydb(keyid), + txn, + &key, + &data, + 0); /* flags*/ + if (ret != 0) { + logthing(LOGTHING_ERROR, + "Problem storing key: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } + } - ret = dbconn->put(dbconn, - NULL, /* txn id */ - &key, - &data, - 0); /* flags*/ - if (ret != 0) { - dbconn->err(dbconn, ret, "Problem storing key"); + free(storebuf.buffer); + storebuf.buffer = NULL; + storebuf.size = 0; + storebuf.offset = 0; + + free_packet_list(packets); + packets = NULL; } /* * Walk through our uids storing the words into the db with the keyid. */ - uids = keyuids(publickey, &primary); + if (!deadlock) { + uids = keyuids(publickey, &primary); + } if (uids != NULL) { for (i = 0; ret == 0 && uids[i] != NULL; i++) { wordlist = makewordlist(wordlist, uids[i]); } - for (curword = wordlist; curword != NULL; + for (curword = wordlist; curword != NULL && !deadlock; curword = curword->next) { memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); @@ -440,13 +573,17 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) worddb_data[10] = (keyid >> 8) & 0xFF; worddb_data[11] = keyid & 0xFF; ret = worddb->put(worddb, - 0, + txn, &key, &data, 0); if (ret != 0) { - worddb->err(worddb, ret, - "Problem storing key"); + logthing(LOGTHING_ERROR, + "Problem storing word: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } } } @@ -462,7 +599,11 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) uids = NULL; } - return 0; + if (!intrans) { + endtrans(); + } + + return deadlock ? -1 : 0 ; } /** @@ -485,10 +626,15 @@ int delete_key(uint64_t keyid, bool intrans) unsigned char worddb_data[12]; struct ll *wordlist = NULL; struct ll *curword = NULL; + bool deadlock = false; keyid &= 0xFFFFFFFF; - fetch_key(keyid, &publickey, intrans); + if (!intrans) { + starttrans(); + } + + fetch_key(keyid, &publickey, true); /* * Walk through the uids removing the words from the worddb. @@ -502,11 +648,11 @@ int delete_key(uint64_t keyid, bool intrans) } ret = worddb->cursor(worddb, - NULL, /* txn */ + txn, &cursor, 0); /* flags */ - for (curword = wordlist; curword != NULL; + for (curword = wordlist; curword != NULL && !deadlock; curword = curword->next) { memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); @@ -536,13 +682,23 @@ int delete_key(uint64_t keyid, bool intrans) &key, &data, DB_GET_BOTH); + if (ret == 0) { ret = cursor->c_del(cursor, 0); + if (ret != 0) { + logthing(LOGTHING_ERROR, + "Problem deleting word: %s", + db_strerror(ret)); + } } if (ret != 0) { - worddb->err(worddb, ret, - "Problem deleting word."); + logthing(LOGTHING_ERROR, + "Problem deleting word: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } } } ret = cursor->c_close(cursor); @@ -562,15 +718,80 @@ int delete_key(uint64_t keyid, bool intrans) publickey = NULL; } - key.data = &keyid; - key.size = sizeof(keyid); + if (!deadlock) { + key.data = &keyid; + key.size = sizeof(keyid); - dbconn->del(dbconn, - NULL, /* txn id */ - &key, - 0); /* flags */ + keydb(keyid)->del(keydb(keyid), + txn, + &key, + 0); /* flags */ + } + + if (!intrans) { + endtrans(); + } - return (ret == DB_NOTFOUND); + return deadlock ? (-1) : (ret == DB_NOTFOUND); +} + +/** + * dumpdb - dump the key database + * @filenamebase: The base filename to use for the dump. + * + * Dumps the database into one or more files, which contain pure OpenPGP + * that can be reimported into onak or gpg. filenamebase provides a base + * file name for the dump; several files may be created, all of which will + * begin with this string and then have a unique number and a .pgp + * extension. + */ +int dumpdb(char *filenamebase) +{ + DBT key, data; + DBC *cursor = NULL; + int ret = 0; + int fd = -1; + int i = 0; + char filename[1024]; + + filename[1023] = 0; + for (i = 0; i < numdbs; i++) { + ret = dbconns[i]->cursor(dbconns[i], + NULL, + &cursor, + 0); /* flags */ + + snprintf(filename, 1023, "%s.%d.pgp", filenamebase, i); + fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0640); + if (fd == -1) { + logthing(LOGTHING_ERROR, + "Error opening keydump file (%s): %s", + filename, + strerror(errno)); + } else { + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + ret = cursor->c_get(cursor, &key, &data, DB_NEXT); + while (ret == 0) { + write(fd, data.data, data.size); + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + ret = cursor->c_get(cursor, &key, &data, + DB_NEXT); + } + if (ret != DB_NOTFOUND) { + logthing(LOGTHING_ERROR, + "Problem reading key: %s", + db_strerror(ret)); + } + close(fd); + } + + ret = cursor->c_close(cursor); + cursor = NULL; + } + + return 0; } /*