/* ldb database library Copyright (C) Derrell Lipman 2005 Copyright (C) Simo Sorce 2005 ** NOTE! The following LGPL license applies to the ldb ** library. This does NOT imply that all of Samba is released ** under the LGPL This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Name: ldb * * Component: ldb sqlite3 backend * * Description: core files for SQLITE3 backend * * Author: Derrell Lipman (based on Andrew Tridgell's LDAP backend) */ #include #include "includes.h" #include "ldb/include/ldb.h" #include "ldb/include/ldb_private.h" #include "ldb/ldb_sqlite3/ldb_sqlite3.h" /* * Macros used throughout */ #ifndef FALSE # define FALSE (0) # define TRUE (! FALSE) #endif #define RESULT_ATTR_TABLE "temp_result_attrs" //#define TEMPTAB /* for testing, create non-temporary table */ #define TEMPTAB "TEMPORARY" /* * Static variables */ sqlite3_stmt * stmtGetEID = NULL; static char *lsqlite3_tprintf(TALLOC_CTX *mem_ctx, const char *fmt, ...) { char *str, *ret; va_list ap; va_start(ap, fmt); str = sqlite3_vmprintf(fmt, ap); va_end(ap); if (str == NULL) return NULL; ret = talloc_strdup(mem_ctx, str); if (ret == NULL) { sqlite3_free(str); return NULL; } sqlite3_free(str); return ret; } static unsigned char base160tab[161] = { 48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 , /* 0-9 */ 58 ,59 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 , /* : ; A-H */ 73 ,74 ,75 ,76 ,77 ,78 ,79 ,80 ,81 ,82 , /* I-R */ 83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,97 ,98 , /* S-Z , a-b */ 99 ,100,101,102,103,104,105,106,107,108, /* c-l */ 109,110,111,112,113,114,115,116,117,118, /* m-v */ 119,120,121,122,160,161,162,163,164,165, /* w-z, latin1 */ 166,167,168,169,170,171,172,173,174,175, /* latin1 */ 176,177,178,179,180,181,182,183,184,185, /* latin1 */ 186,187,188,189,190,191,192,193,194,195, /* latin1 */ 196,197,198,199,200,201,202,203,204,205, /* latin1 */ 206,207,208,209,210,211,212,213,214,215, /* latin1 */ 216,217,218,219,220,221,222,223,224,225, /* latin1 */ 226,227,228,229,230,231,232,233,234,235, /* latin1 */ 236,237,238,239,240,241,242,243,244,245, /* latin1 */ 246,247,248,249,250,251,252,253,254,255, /* latin1 */ '\0' }; /* * base160() * * Convert an unsigned long integer into a base160 representation of the * number. * * Parameters: * val -- * value to be converted * * result -- * character array, 5 bytes long, into which the base160 representation * will be placed. The result will be a four-digit representation of the * number (with leading zeros prepended as necessary), and null * terminated. * * Returns: * Nothing */ static void base160_sql(sqlite3_context * hContext, int argc, sqlite3_value ** argv) { int i; long long val; char result[5]; val = sqlite3_value_int64(argv[0]); for (i = 3; i >= 0; i--) { result[i] = base160tab[val % 160]; val /= 160; } result[4] = '\0'; sqlite3_result_text(hContext, result, -1, SQLITE_TRANSIENT); } /* * base160next_sql() * * This function enhances sqlite by adding a "base160_next()" function which is * accessible via queries. * * Retrieve the next-greater number in the base160 sequence for the terminal * tree node (the last four digits). Only one tree level (four digits) is * operated on. * * Input: * A character string: either an empty string (in which case no operation is * performed), or a string of base160 digits with a length of a multiple of * four digits. * * Output: * Upon return, the trailing four digits (one tree level) will have been * incremented by 1. */ static void base160next_sql(sqlite3_context * hContext, int argc, sqlite3_value ** argv) { int i; int len; unsigned char * pTab; unsigned char * pBase160 = strdup(sqlite3_value_text(argv[0])); unsigned char * pStart = pBase160; /* * We need a minimum of four digits, and we will always get a multiple * of four digits. */ if (pBase160 != NULL && (len = strlen(pBase160)) >= 4 && len % 4 == 0) { if (pBase160 == NULL) { sqlite3_result_null(hContext); return; } pBase160 += strlen(pBase160) - 1; /* We only carry through four digits: one level in the tree */ for (i = 0; i < 4; i++) { /* What base160 value does this digit have? */ pTab = strchr(base160tab, *pBase160); /* Is there a carry? */ if (pTab < base160tab + sizeof(base160tab) - 1) { /* * Nope. Just increment this value and we're * done. */ *pBase160 = *++pTab; break; } else { /* * There's a carry. This value gets * base160tab[0], we decrement the buffer * pointer to get the next higher-order digit, * and continue in the loop. */ *pBase160-- = base160tab[0]; } } sqlite3_result_text(hContext, pStart, strlen(pStart), free); } else { sqlite3_result_value(hContext, argv[0]); if (pBase160 != NULL) { free(pBase160); } } } static char *parsetree_to_sql(struct ldb_module *module, void *mem_ctx, const struct ldb_parse_tree *t) { const struct ldb_attrib_handler *h; struct ldb_val value, subval; char *wild_card_string; char *child, *tmp; char *ret = NULL; char *attr; int i; switch(t->operation) { case LDB_OP_AND: tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]); if (tmp == NULL) return NULL; for (i = 1; i < t->u.list.num_elements; i++) { child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]); if (child == NULL) return NULL; tmp = talloc_asprintf_append(tmp, " INTERSECT %s ", child); if (tmp == NULL) return NULL; } ret = talloc_asprintf(mem_ctx, "SELECT * FROM ( %s )\n", tmp); return ret; case LDB_OP_OR: tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]); if (tmp == NULL) return NULL; for (i = 1; i < t->u.list.num_elements; i++) { child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]); if (child == NULL) return NULL; tmp = talloc_asprintf_append(tmp, " UNION %s ", child); if (tmp == NULL) return NULL; } return talloc_asprintf(mem_ctx, "SELECT * FROM ( %s ) ", tmp); case LDB_OP_NOT: child = parsetree_to_sql(module, mem_ctx, t->u.isnot.child); if (child == NULL) return NULL; return talloc_asprintf(mem_ctx, "SELECT eid FROM ldb_entry " "WHERE eid NOT IN ( %s ) ", child); case LDB_OP_EQUALITY: /* * For simple searches, we want to retrieve the list of EIDs that * match the criteria. */ attr = ldb_casefold(mem_ctx, t->u.equality.attr); if (attr == NULL) return NULL; h = ldb_attrib_handler(module->ldb, attr); /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value); if (value.data == NULL) { return NULL; } if (strcasecmp(t->u.equality.attr, "objectclass") == 0) { /* * For object classes, we want to search for all objectclasses * that are subclasses as well. */ return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values\n" "WHERE norm_attr_name = 'OBJECTCLASS' " "AND norm_attr_value IN\n" " (SELECT class_name FROM ldb_object_classes\n" " WHERE tree_key GLOB\n" " (SELECT tree_key FROM ldb_object_classes\n" " WHERE class_name = '%q'\n" " ) || '*'\n" " )\n", value.data); } else if (strcasecmp(t->u.equality.attr, "dn") == 0) { /* DN query is a special ldb case */ char *cdn = ldb_dn_linearize_casefold(module->ldb, ldb_dn_explode(module->ldb, value.data)); return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_entry " "WHERE norm_dn = '%q'", cdn); } else { /* A normal query. */ return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' " "AND norm_attr_value = '%q'", attr, value.data); } case LDB_OP_SUBSTRING: wild_card_string = talloc_strdup(mem_ctx, (t->u.substring.start_with_wildcard)?"*":""); if (wild_card_string == NULL) return NULL; for (i = 0; t->u.substring.chunks[i]; i++) { wild_card_string = talloc_asprintf_append(wild_card_string, "%s*", t->u.substring.chunks[i]->data); if (wild_card_string == NULL) return NULL; } if ( ! t->u.substring.end_with_wildcard ) { /* remove last wildcard */ wild_card_string[strlen(wild_card_string) - 1] = '\0'; } attr = ldb_casefold(mem_ctx, t->u.substring.attr); if (attr == NULL) return NULL; h = ldb_attrib_handler(module->ldb, attr); subval.data = wild_card_string; subval.length = strlen(wild_card_string) + 1; /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, mem_ctx, &(subval), &value); if (value.data == NULL) { return NULL; } return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' " "AND norm_attr_value GLOB '%q'", attr, value.data); case LDB_OP_GREATER: attr = ldb_casefold(mem_ctx, t->u.equality.attr); if (attr == NULL) return NULL; h = ldb_attrib_handler(module->ldb, attr); /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value); if (value.data == NULL) { return NULL; } return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' " "AND norm_attr_value LIKE '>=%q' ESCAPE '%q' ", attr, value.data, attr); case LDB_OP_LESS: attr = ldb_casefold(mem_ctx, t->u.equality.attr); if (attr == NULL) return NULL; h = ldb_attrib_handler(module->ldb, attr); /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value); if (value.data == NULL) { return NULL; } return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' " "AND norm_attr_value LIKE '<=%q' ESCAPE '%q' ", attr, value.data, attr); case LDB_OP_PRESENT: if (strcasecmp(t->u.present.attr, "dn") == 0) { return talloc_strdup(mem_ctx, "SELECT eid FROM ldb_entry"); } attr = ldb_casefold(mem_ctx, t->u.present.attr); if (attr == NULL) return NULL; return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' ", attr); case LDB_OP_APPROX: attr = ldb_casefold(mem_ctx, t->u.equality.attr); if (attr == NULL) return NULL; h = ldb_attrib_handler(module->ldb, attr); /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value); if (value.data == NULL) { return NULL; } return lsqlite3_tprintf(mem_ctx, "SELECT eid FROM ldb_attribute_values " "WHERE norm_attr_name = '%q' " "AND norm_attr_value LIKE '~%q' ESCAPE '%q' ", attr, value.data, attr); case LDB_OP_EXTENDED: #warning "work out how to handle bitops" return NULL; default: break; }; /* should never occur */ abort(); return NULL; } /* obtain a named lock */ static int lsqlite3_lock(struct ldb_module * module, const char * lockname) { struct lsqlite3_private * lsqlite3 = module->private_data; /* FIXME if (lockname == NULL) { return -1; } if (strcmp(lockname, "transaction") == 0) { if (lsqlite3->lock_count == 0) { if (query_norows(lsqlite3, "BEGIN EXCLUSIVE;") != 0) { return -1; } } ++lsqlite3->lock_count; } */ return 0; } /* release a named lock */ static int lsqlite3_unlock(struct ldb_module *module, const char *lockname) { struct lsqlite3_private * lsqlite3 = module->private_data; /* FIXME if (lockname == NULL) { return -1; } if (strcmp(lockname, "transaction") == 0) { if (lsqlite3->lock_count == 1) { if (query_norows(lsqlite3, "COMMIT;") != 0) { query_norows(lsqlite3, "ROLLBACK;"); } } else if (lsqlite3->lock_count > 0) { --lsqlite3->lock_count; } } else if (strcmp(lockname, "rollback") == 0) { query_norows(lsqlite3, "ROLLBACK;"); } */ return 0; } /* * query_int() * * This function is used for the common case of queries that return a single * integer value. * * NOTE: If more than one value is returned by the query, all but the first * one will be ignored. */ static int query_int(const struct lsqlite3_private * lsqlite3, long long * pRet, const char * pSql, ...) { int ret; int bLoop; char * p; sqlite3_stmt * pStmt; va_list args; /* Begin access to variable argument list */ va_start(args, pSql); /* Format the query */ if ((p = sqlite3_vmprintf(pSql, args)) == NULL) { return SQLITE_NOMEM; } /* * Prepare and execute the SQL statement. Loop allows retrying on * certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes, * requiring retrying the operation. */ for (bLoop = TRUE; bLoop; ) { /* Compile the SQL statement into sqlite virtual machine */ if ((ret = sqlite3_prepare(lsqlite3->sqlite, p, -1, &pStmt, NULL)) == SQLITE_SCHEMA) { if (stmtGetEID != NULL) { sqlite3_finalize(stmtGetEID); stmtGetEID = NULL; } continue; } else if (ret != SQLITE_OK) { break; } /* One row expected */ if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) { if (stmtGetEID != NULL) { sqlite3_finalize(stmtGetEID); stmtGetEID = NULL; } (void) sqlite3_finalize(pStmt); continue; } else if (ret != SQLITE_ROW) { (void) sqlite3_finalize(pStmt); break; } /* Get the value to be returned */ *pRet = sqlite3_column_int64(pStmt, 0); /* Free the virtual machine */ if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) { if (stmtGetEID != NULL) { sqlite3_finalize(stmtGetEID); stmtGetEID = NULL; } continue; } else if (ret != SQLITE_OK) { (void) sqlite3_finalize(pStmt); break; } /* * Normal condition is only one time through loop. Loop is * rerun in error conditions, via "continue", above. */ bLoop = FALSE; } /* All done with variable argument list */ va_end(args); /* Free the memory we allocated for our query string */ sqlite3_free(p); return ret; } /* * This is a bad hack to support ldap style comparisons whithin sqlite. * This function substitues the X LIKE Y ESCAPE Z expression * X is an expression + value to compare against (eg: ">=test") * Y is the attribute in the row currently under test * Z is the attribute name the value of which we want to test */ static void lsqlite3_compare(sqlite3_context *ctx, int argc, sqlite3_value **argv) { struct ldb_context *ldb = (struct ldb_context *)sqlite3_user_data(ctx); const unsigned char *X = sqlite3_value_text(argv[0]); const unsigned char *Y = sqlite3_value_text(argv[1]); const unsigned char *Z = sqlite3_value_text(argv[2]); const unsigned char *p; const struct ldb_attrib_handler *h; struct ldb_val valX; struct ldb_val valY; int ret; switch (X[0]) { /* greater */ case '>': /* >= */ p = &(X[2]); h = ldb_attrib_handler(ldb, Z); valX.data = p; valX.length = strlen(p); valY.data = Y; valY.length = strlen(Y); ret = h->comparison_fn(ldb, ldb, &valY, &valX); if (ret >= 0) sqlite3_result_int(ctx, 1); else sqlite3_result_int(ctx, 0); return; /* lesser */ case '<': /* <= */ p = &(X[2]); h = ldb_attrib_handler(ldb, Z); valX.data = p; valX.length = strlen(p); valY.data = Y; valY.length = strlen(Y); ret = h->comparison_fn(ldb, ldb, &valY, &valX); if (ret <= 0) sqlite3_result_int(ctx, 1); else sqlite3_result_int(ctx, 0); return; /* approx */ case '~': /* TODO */ sqlite3_result_int(ctx, 0); return; /* bitops */ case ':': /* TODO */ sqlite3_result_int(ctx, 0); return; default: break; } sqlite3_result_error(ctx, "Value must start with a special operation char (<>~:)!", -1); return; } /* rename a record */ static int lsqlite3_safe_rollback(sqlite3 *sqlite) { char *errmsg; int ret; /* execute */ ret = sqlite3_exec(sqlite, "ROLLBACK;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_safe_rollback: Serious Error: %s\n", errmsg); free(errmsg); } return -1; } return 0; } /* return an eid as result */ static int lsqlite3_eid_callback(void *result, int col_num, char **cols, char **names) { long long *eid = (long long *)result; if (col_num != 1) return SQLITE_ABORT; if (strcasecmp(names[0], "eid") != 0) return SQLITE_ABORT; *eid = atoll(cols[0]); return SQLITE_OK; } struct lsqlite3_msgs { int count; struct ldb_message **msgs; long long current_eid; const char * const * attrs; TALLOC_CTX *mem_ctx; }; /* * add a single set of ldap message values to a ldb_message */ static int lsqlite3_search_callback(void *result, int col_num, char **cols, char **names) { struct lsqlite3_msgs *msgs = (struct lsqlite3_msgs *)result; struct ldb_message *msg; long long eid; int i; /* eid, dn, attr_name, attr_value */ if (col_num != 4) return SQLITE_ABORT; eid = atoll(cols[0]); if (eid != msgs->current_eid) { msgs->msgs = talloc_realloc(msgs->mem_ctx, msgs->msgs, struct ldb_message *, msgs->count + 2); if (msgs->msgs == NULL) return SQLITE_ABORT; msgs->msgs[msgs->count] = talloc(msgs->msgs, struct ldb_message); if (msgs->msgs[msgs->count] == NULL) return SQLITE_ABORT; msgs->msgs[msgs->count]->dn = NULL; msgs->msgs[msgs->count]->num_elements = 0; msgs->msgs[msgs->count]->elements = NULL; msgs->msgs[msgs->count]->private_data = NULL; msgs->count++; msgs->current_eid = eid; } msg = msgs->msgs[msgs->count -1]; if (msg->dn == NULL) { msg->dn = ldb_dn_explode(msg, cols[1]); if (msg->dn == NULL) return SQLITE_ABORT; } if (msgs->attrs) { int found = 0; for (i = 0; msgs->attrs[i]; i++) { if (strcasecmp(cols[2], msgs->attrs[i]) == 0) { found = 1; break; } } if (!found) return 0; } msg->elements = talloc_realloc(msg, msg->elements, struct ldb_message_element, msg->num_elements + 1); if (msg->elements == NULL) return SQLITE_ABORT; msg->elements[msg->num_elements].flags = 0; msg->elements[msg->num_elements].name = talloc_strdup(msg->elements, cols[2]); if (msg->elements[msg->num_elements].name == NULL) return SQLITE_ABORT; msg->elements[msg->num_elements].num_values = 1; msg->elements[msg->num_elements].values = talloc_array(msg->elements, struct ldb_val, 1); if (msg->elements[msg->num_elements].values == NULL) return SQLITE_ABORT; msg->elements[msg->num_elements].values[0].length = strlen(cols[3]); msg->elements[msg->num_elements].values[0].data = talloc_strdup(msg->elements, cols[3]); if (msg->elements[msg->num_elements].values[0].data == NULL) return SQLITE_ABORT; msg->num_elements++; return SQLITE_OK; } /* * lsqlite3_get_eid() * lsqlite3_get_eid_ndn() * * These functions are used for the very common case of retrieving an EID value * given a (normalized) DN. */ static long long lsqlite3_get_eid_ndn(sqlite3 *sqlite, void *mem_ctx, const char *norm_dn) { char *errmsg; char *query; long long eid = -1; long long ret; /* get object eid */ query = lsqlite3_tprintf(mem_ctx, "SELECT eid " "FROM ldb_entry " "WHERE norm_dn = '%q';", norm_dn); if (query == NULL) return -1; ret = sqlite3_exec(sqlite, query, lsqlite3_eid_callback, &eid, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_get_eid: Fatal Error: %s\n", errmsg); free(errmsg); } return -1; } return eid; } static long long lsqlite3_get_eid(struct ldb_module *module, const struct ldb_dn *dn) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; long long eid = -1; char *cdn; /* ignore ltdb specials */ if (ldb_dn_is_special(dn)) { return -1; } /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_get_eid local context"); if (local_ctx == NULL) { return -1; } cdn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, dn)); if (!cdn) goto done; eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, local_ctx, cdn); done: talloc_free(local_ctx); return eid; } /* * Interface functions referenced by lsqlite3_ops */ /* search for matching records, by tree */ static int lsqlite3_search_bytree(struct ldb_module * module, const struct ldb_dn* basedn, enum ldb_scope scope, struct ldb_parse_tree * tree, const char * const * attrs, struct ldb_message *** res) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; struct lsqlite3_msgs msgs; char *norm_basedn; char *sqlfilter; char *errmsg; char *query; int ret, i; /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_search_by_tree local context"); if (local_ctx == NULL) { return -1; } if (basedn) { norm_basedn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, basedn)); if (norm_basedn == NULL) goto failed; } else norm_basedn = talloc_strdup(local_ctx, ""); if (*norm_basedn == '\0' && (scope == LDB_SCOPE_BASE || scope == LDB_SCOPE_ONELEVEL)) goto failed; /* Convert filter into a series of SQL conditions (constraints) */ sqlfilter = parsetree_to_sql(module, local_ctx, tree); switch(scope) { case LDB_SCOPE_DEFAULT: case LDB_SCOPE_SUBTREE: if (*norm_basedn != '\0') { query = lsqlite3_tprintf(local_ctx, "SELECT entry.eid,\n" " entry.dn,\n" " av.attr_name,\n" " av.attr_value\n" " FROM ldb_entry AS entry\n" " LEFT OUTER JOIN ldb_attribute_values AS av\n" " ON av.eid = entry.eid\n" " WHERE entry.eid IN\n" " (SELECT DISTINCT ldb_entry.eid\n" " FROM ldb_entry\n" " WHERE (ldb_entry.norm_dn GLOB('*,%q')\n" " OR ldb_entry.norm_dn = '%q')\n" " AND ldb_entry.eid IN\n" " (%s)\n" " )\n" " ORDER BY entry.eid ASC;", norm_basedn, norm_basedn, sqlfilter); } else { query = lsqlite3_tprintf(local_ctx, "SELECT entry.eid,\n" " entry.dn,\n" " av.attr_name,\n" " av.attr_value\n" " FROM ldb_entry AS entry\n" " LEFT OUTER JOIN ldb_attribute_values AS av\n" " ON av.eid = entry.eid\n" " WHERE entry.eid IN\n" " (SELECT DISTINCT ldb_entry.eid\n" " FROM ldb_entry\n" " WHERE ldb_entry.eid IN\n" " (%s)\n" " )\n" " ORDER BY entry.eid ASC;", sqlfilter); } break; case LDB_SCOPE_BASE: query = lsqlite3_tprintf(local_ctx, "SELECT entry.eid,\n" " entry.dn,\n" " av.attr_name,\n" " av.attr_value\n" " FROM ldb_entry AS entry\n" " LEFT OUTER JOIN ldb_attribute_values AS av\n" " ON av.eid = entry.eid\n" " WHERE entry.eid IN\n" " (SELECT DISTINCT ldb_entry.eid\n" " FROM ldb_entry\n" " WHERE ldb_entry.norm_dn = '%q'\n" " AND ldb_entry.eid IN\n" " (%s)\n" " )\n" " ORDER BY entry.eid ASC;", norm_basedn, sqlfilter); break; case LDB_SCOPE_ONELEVEL: query = lsqlite3_tprintf(local_ctx, "SELECT entry.eid,\n" " entry.dn,\n" " av.attr_name,\n" " av.attr_value\n" " FROM ldb_entry AS entry\n" " LEFT OUTER JOIN ldb_attribute_values AS av\n" " ON av.eid = entry.eid\n" " WHERE entry.eid IN\n" " (SELECT DISTINCT ldb_entry.eid\n" " FROM ldb_entry\n" " WHERE norm_dn GLOB('*,%q')\n" " AND NOT norm_dn GLOB('*,*,%q')\n" " AND ldb_entry.eid IN\n(%s)\n" " )\n" " ORDER BY entry.eid ASC;", norm_basedn, norm_basedn, sqlfilter); break; } if (query == NULL) { ret = -1; goto failed; } /* * / printf ("%s\n", query); / * */ msgs.msgs = NULL; msgs.count = 0; msgs.current_eid = 0; msgs.mem_ctx = local_ctx; msgs.attrs = attrs; ret = sqlite3_exec(lsqlite3->sqlite, query, lsqlite3_search_callback, &msgs, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_search_bytree: Fatal Error: %s\n", errmsg); free(errmsg); } goto failed; } for (i = 0; i < msgs.count; i++) { msgs.msgs[i] = ldb_msg_canonicalize(module->ldb, msgs.msgs[i]); if (msgs.msgs[i] == NULL) goto failed; } *res = talloc_steal(module, msgs.msgs); ret = msgs.count; talloc_free(local_ctx); return ret; /* If error, return error code; otherwise return number of results */ failed: talloc_free(local_ctx); return -1; } /* search for matching records, by expression */ static int lsqlite3_search(struct ldb_module * module, const struct ldb_dn *basedn, enum ldb_scope scope, const char * expression, const char * const *attrs, struct ldb_message *** res) { struct ldb_parse_tree * tree; int ret; /* Handle tdb specials */ if (ldb_dn_is_special(basedn)) { #warning "handle tdb specials" return 0; } #if 0 /* (|(objectclass=*)(dn=*)) is passed by the command line tool now instead */ /* Handle the special case of requesting all */ if (pExpression != NULL && *pExpression == '\0') { pExpression = "dn=*"; } #endif /* Parse the filter expression into a tree we can work with */ if ((tree = ldb_parse_tree(module->ldb, expression)) == NULL) { return -1; } /* Now use the bytree function for the remainder of processing */ ret = lsqlite3_search_bytree(module, basedn, scope, tree, attrs, res); /* Free the parse tree */ talloc_free(tree); /* All done. */ return ret; } /* add a record */ static int lsqlite3_add(struct ldb_module *module, const struct ldb_message *msg) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; long long eid; char *dn, *ndn; char *errmsg; char *query; int rollback = 0; int ret; int i; /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_add local context"); if (local_ctx == NULL) { return -1; } /* See if this is an ltdb special */ if (ldb_dn_is_special(msg->dn)) { struct ldb_dn *c; c = ldb_dn_explode(local_ctx, "@SUBCLASSES"); if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) { #warning "insert subclasses into object class tree" goto failed; } /* c = ldb_dn_explode(local_ctx, "@INDEXLIST"); if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) { #warning "should we handle indexes somehow ?" goto failed; } */ /* Others are implicitly ignored */ return 0; } /* create linearized and normalized dns */ dn = ldb_dn_linearize(local_ctx, msg->dn); ndn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, msg->dn)); if (dn == NULL || ndn == NULL) goto failed; query = lsqlite3_tprintf(local_ctx, /* Begin the transaction */ "BEGIN EXCLUSIVE; " /* Add new entry */ "INSERT OR ABORT INTO ldb_entry " "('dn', 'norm_dn') " "VALUES ('%q', '%q');", dn, ndn); if (query == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_add: exec error: %s\n", errmsg); free(errmsg); } lsqlite3_safe_rollback(lsqlite3->sqlite); goto failed; } rollback = 1; eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, local_ctx, ndn); if (eid == -1) goto failed; for (i = 0; i < msg->num_elements; i++) { const struct ldb_message_element *el = &msg->elements[i]; const struct ldb_attrib_handler *h; char *attr; int j; /* Get a case-folded copy of the attribute name */ attr = ldb_casefold(local_ctx, el->name); if (attr == NULL) goto failed; h = ldb_attrib_handler(module->ldb, el->name); /* For each value of the specified attribute name... */ for (j = 0; j < el->num_values; j++) { struct ldb_val value; char *insert; /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, local_ctx, &(el->values[j]), &value); if (value.data == NULL) goto failed; insert = lsqlite3_tprintf(local_ctx, "INSERT OR ROLLBACK INTO ldb_attribute_values " "('eid', 'attr_name', 'norm_attr_name'," " 'attr_value', 'norm_attr_value') " "VALUES ('%lld', '%q', '%q', '%q', '%q');", eid, el->name, attr, el->values[j].data, value.data); if (insert == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, insert, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_add: insert error: %s\n", errmsg); free(errmsg); } goto failed; } } } ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_add: commit error: %s\n", errmsg); free(errmsg); } goto failed; } talloc_free(local_ctx); return 0; failed: if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite); talloc_free(local_ctx); return -1; } /* modify a record */ static int lsqlite3_modify(struct ldb_module *module, const struct ldb_message *msg) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; long long eid; char *errmsg; int rollback = 0; int ret; int i; /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_modify local context"); if (local_ctx == NULL) { return -1; } /* See if this is an ltdb special */ if (ldb_dn_is_special(msg->dn)) { struct ldb_dn *c; c = ldb_dn_explode(local_ctx, "@SUBCLASSES"); if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) { #warning "modify subclasses into object class tree" goto failed; } c = ldb_dn_explode(local_ctx, "@INDEXLIST"); if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) { #warning "should we handle indexes somehow ?" goto failed; } /* Others are implicitly ignored */ return 0; } ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } rollback = 1; eid = lsqlite3_get_eid(module, msg->dn); if (eid == -1) { goto failed; } for (i = 0; i < msg->num_elements; i++) { const struct ldb_message_element *el = &msg->elements[i]; const struct ldb_attrib_handler *h; int flags = el->flags & LDB_FLAG_MOD_MASK; char *attr; char *mod; int j; /* Get a case-folded copy of the attribute name */ attr = ldb_casefold(local_ctx, el->name); if (attr == NULL) { goto failed; } h = ldb_attrib_handler(module->ldb, el->name); switch (flags) { case LDB_FLAG_MOD_REPLACE: /* remove all attributes before adding the replacements */ mod = lsqlite3_tprintf(local_ctx, "DELETE FROM ldb_attribute_values " "WHERE eid = '%lld' " "AND norm_attr_name = '%q';", eid, attr); if (mod == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } /* MISSING break is INTENTIONAL */ case LDB_FLAG_MOD_ADD: #warning "We should throw an error if no value is provided!" /* For each value of the specified attribute name... */ for (j = 0; j < el->num_values; j++) { struct ldb_val value; /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, local_ctx, &(el->values[j]), &value); if (value.data == NULL) { goto failed; } mod = lsqlite3_tprintf(local_ctx, "INSERT OR ROLLBACK INTO ldb_attribute_values " "('eid', 'attr_name', 'norm_attr_name'," " 'attr_value', 'norm_attr_value') " "VALUES ('%lld', '%q', '%q', '%q', '%q');", eid, el->name, attr, el->values[j].data, value.data); if (mod == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } } break; case LDB_FLAG_MOD_DELETE: #warning "We should throw an error if the attribute we are trying to delete does not exist!" if (el->num_values == 0) { mod = lsqlite3_tprintf(local_ctx, "DELETE FROM ldb_attribute_values " "WHERE eid = '%lld' " "AND norm_attr_name = '%q';", eid, attr); if (mod == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } } /* For each value of the specified attribute name... */ for (j = 0; j < el->num_values; j++) { struct ldb_val value; /* Get a canonicalised copy of the data */ h->canonicalise_fn(module->ldb, local_ctx, &(el->values[j]), &value); if (value.data == NULL) { goto failed; } mod = lsqlite3_tprintf(local_ctx, "DELETE FROM ldb_attribute_values " "WHERE eid = '%lld' " "AND norm_attr_name = '%q' " "AND norm_attr_value = '%q';", eid, attr, value.data); if (mod == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } } break; } } ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_modify: error: %s\n", errmsg); free(errmsg); } goto failed; } talloc_free(local_ctx); return 0; failed: if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite); talloc_free(local_ctx); return -1; } /* delete a record */ static int lsqlite3_delete(struct ldb_module *module, const struct ldb_dn *dn) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; long long eid; char *errmsg; char *query; int ret; /* ignore ltdb specials */ if (ldb_dn_is_special(dn)) { return 0; } /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_delete local context"); if (local_ctx == NULL) { return -1; } eid = lsqlite3_get_eid(module, dn); if (eid == -1) goto failed; query = lsqlite3_tprintf(local_ctx, /* Begin the transaction */ "BEGIN EXCLUSIVE; " /* Delete entry */ "DELETE FROM ldb_entry WHERE eid = %lld; " /* Delete attributes */ "DELETE FROM ldb_attribute_values WHERE eid = %lld; " /* Commit */ "COMMIT;", eid, eid); if (query == NULL) goto failed; ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_delete: error getting eid: %s\n", errmsg); free(errmsg); } lsqlite3_safe_rollback(lsqlite3->sqlite); goto failed; } talloc_free(local_ctx); return 0; failed: talloc_free(local_ctx); return -1; } /* rename a record */ static int lsqlite3_rename(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn) { TALLOC_CTX *local_ctx; struct lsqlite3_private *lsqlite3 = module->private_data; char *new_dn, *new_cdn, *old_cdn; char *errmsg; char *query; int ret; /* ignore ltdb specials */ if (ldb_dn_is_special(olddn) || ldb_dn_is_special(newdn)) { return 0; } /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context"); if (local_ctx == NULL) { return -1; } /* create linearized and normalized dns */ old_cdn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, olddn)); new_cdn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, newdn)); new_dn = ldb_dn_linearize(local_ctx, newdn); if (old_cdn == NULL || new_cdn == NULL || new_dn == NULL) goto failed; /* build the SQL query */ query = lsqlite3_tprintf(local_ctx, "UPDATE ldb_entry SET dn = '%q', norm_dn = '%q' " "WHERE norm_dn = '%q';", new_dn, new_cdn, old_cdn); if (query == NULL) goto failed; /* execute */ ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3_rename: sqlite3_exec error: %s\n", errmsg); free(errmsg); } goto failed; } /* clean up and exit */ talloc_free(local_ctx); return 0; failed: talloc_free(local_ctx); return -1; } /* return extended error information */ static const char * lsqlite3_errstring(struct ldb_module *module) { struct lsqlite3_private * lsqlite3 = module->private_data; return sqlite3_errmsg(lsqlite3->sqlite); } /* * Static functions */ static int initialize(struct lsqlite3_private *lsqlite3, struct ldb_context *ldb, const char *url) { TALLOC_CTX *local_ctx; long long queryInt; int rollback = 0; char *errmsg; char *schema; int ret; /* create a local ctx */ local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context"); if (local_ctx == NULL) { return -1; } schema = lsqlite3_tprintf(local_ctx, "CREATE TABLE ldb_info AS " " SELECT 'LDB' AS database_type," " '1.0' AS version;" /* * The entry table holds the information about an entry. * This table is used to obtain the EID of the entry and to * support scope=one and scope=base. The parent and child * table is included in the entry table since all the other * attributes are dependent on EID. */ "CREATE TABLE ldb_entry " "(" " eid INTEGER PRIMARY KEY AUTOINCREMENT," " dn TEXT UNIQUE NOT NULL," " norm_dn TEXT UNIQUE NOT NULL" ");" "CREATE TABLE ldb_object_classes" "(" " class_name TEXT PRIMARY KEY," " parent_class_name TEXT," " tree_key TEXT UNIQUE," " max_child_num INTEGER DEFAULT 0" ");" /* * We keep a full listing of attribute/value pairs here */ "CREATE TABLE ldb_attribute_values" "(" " eid INTEGER REFERENCES ldb_entry," " attr_name TEXT," " norm_attr_name TEXT," " attr_value TEXT," " norm_attr_value TEXT " ");" /* * Indexes */ "CREATE INDEX ldb_attribute_values_eid_idx " " ON ldb_attribute_values (eid);" "CREATE INDEX ldb_attribute_values_name_value_idx " " ON ldb_attribute_values (attr_name, norm_attr_value);" /* * Triggers */ "CREATE TRIGGER ldb_object_classes_insert_tr" " AFTER INSERT" " ON ldb_object_classes" " FOR EACH ROW" " BEGIN" " UPDATE ldb_object_classes" " SET tree_key = COALESCE(tree_key, " " (" " SELECT tree_key || " " (SELECT base160(max_child_num + 1)" " FROM ldb_object_classes" " WHERE class_name = " " new.parent_class_name)" " FROM ldb_object_classes " " WHERE class_name = new.parent_class_name " " ));" " UPDATE ldb_object_classes " " SET max_child_num = max_child_num + 1" " WHERE class_name = new.parent_class_name;" " END;" /* * Table initialization */ "INSERT INTO ldb_object_classes " " (class_name, tree_key) " " VALUES " " ('TOP', '0001');"); /* Skip protocol indicator of url */ if (strncmp(url, "sqlite://", 9) != 0) { return SQLITE_MISUSE; } /* Update pointer to just after the protocol indicator */ url += 9; /* Try to open the (possibly empty/non-existent) database */ if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) { return ret; } /* In case this is a new database, enable auto_vacuum */ ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA auto_vacuum = 1;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3 initializaion error: %s\n", errmsg); free(errmsg); } goto failed; } /* DANGEROUS */ ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA synchronous = OFF;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3 initializaion error: %s\n", errmsg); free(errmsg); } goto failed; } /* */ /* Establish a busy timeout of 30 seconds */ if ((ret = sqlite3_busy_timeout(lsqlite3->sqlite, 30000)) != SQLITE_OK) { return ret; } /* Create a function, callable from sql, to increment a tree_key */ if ((ret = sqlite3_create_function(lsqlite3->sqlite,/* handle */ "base160_next", /* function name */ 1, /* number of args */ SQLITE_ANY, /* preferred text type */ NULL, /* user data */ base160next_sql, /* called func */ NULL, /* step func */ NULL /* final func */ )) != SQLITE_OK) { return ret; } /* Create a function, callable from sql, to convert int to base160 */ if ((ret = sqlite3_create_function(lsqlite3->sqlite,/* handle */ "base160", /* function name */ 1, /* number of args */ SQLITE_ANY, /* preferred text type */ NULL, /* user data */ base160_sql, /* called func */ NULL, /* step func */ NULL /* final func */ )) != SQLITE_OK) { return ret; } /* Create a function, callable from sql, to perform various comparisons */ if ((ret = sqlite3_create_function(lsqlite3->sqlite, /* handle */ "like", /* function name */ 3, /* number of args */ SQLITE_ANY, /* preferred text type */ ldb , /* user data */ lsqlite3_compare, /* called func */ NULL, /* step func */ NULL /* final func */ )) != SQLITE_OK) { return ret; } /* Begin a transaction */ ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3: initialization error: %s\n", errmsg); free(errmsg); } goto failed; } rollback = 1; /* Determine if this is a new database. No tables means it is. */ if (query_int(lsqlite3, &queryInt, "SELECT COUNT(*)\n" " FROM sqlite_master\n" " WHERE type = 'table';") != 0) { goto failed; } if (queryInt == 0) { /* * Create the database schema */ ret = sqlite3_exec(lsqlite3->sqlite, schema, NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3 initializaion error: %s\n", errmsg); free(errmsg); } goto failed; } } else { /* * Ensure that the database we opened is one of ours */ if (query_int(lsqlite3, &queryInt, "SELECT " " (SELECT COUNT(*) = 2" " FROM sqlite_master " " WHERE type = 'table' " " AND name IN " " (" " 'ldb_entry', " " 'ldb_object_classes' " " ) " " ) " " AND " " (SELECT 1 " " FROM ldb_info " " WHERE database_type = 'LDB' " " AND version = '1.0'" " );") != 0 || queryInt != 1) { /* It's not one that we created. See ya! */ goto failed; } } /* Commit the transaction */ ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg); if (ret != SQLITE_OK) { if (errmsg) { printf("lsqlite3: iniialization error: %s\n", errmsg); free(errmsg); } goto failed; } return SQLITE_OK; failed: if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite); sqlite3_close(lsqlite3->sqlite); return -1; } static int destructor(void *p) { struct lsqlite3_private *lsqlite3 = p; if (lsqlite3->sqlite) { sqlite3_close(lsqlite3->sqlite); } return 0; } /* * Table of operations for the sqlite3 backend */ static const struct ldb_module_ops lsqlite3_ops = { .name = "sqlite", .search = lsqlite3_search, .search_bytree = lsqlite3_search_bytree, .add_record = lsqlite3_add, .modify_record = lsqlite3_modify, .delete_record = lsqlite3_delete, .rename_record = lsqlite3_rename, .named_lock = lsqlite3_lock, .named_unlock = lsqlite3_unlock, .errstring = lsqlite3_errstring }; /* * connect to the database */ int lsqlite3_connect(struct ldb_context *ldb, const char *url, unsigned int flags, const char *options[]) { int i; int ret; struct lsqlite3_private * lsqlite3 = NULL; lsqlite3 = talloc(ldb, struct lsqlite3_private); if (!lsqlite3) { goto failed; } lsqlite3->sqlite = NULL; lsqlite3->options = NULL; ret = initialize(lsqlite3, ldb, url); if (ret != SQLITE_OK) { goto failed; } talloc_set_destructor(lsqlite3, destructor); ldb->modules = talloc(ldb, struct ldb_module); if (!ldb->modules) { goto failed; } ldb->modules->ldb = ldb; ldb->modules->prev = ldb->modules->next = NULL; ldb->modules->private_data = lsqlite3; ldb->modules->ops = &lsqlite3_ops; if (options) { /* * take a copy of the options array, so we don't have to rely * on the caller keeping it around (it might be dynamic) */ for (i=0;options[i];i++) ; lsqlite3->options = talloc_array(lsqlite3, char *, i+1); if (!lsqlite3->options) { goto failed; } for (i=0;options[i];i++) { lsqlite3->options[i+1] = NULL; lsqlite3->options[i] = talloc_strdup(lsqlite3->options, options[i]); if (!lsqlite3->options[i]) { goto failed; } } } return 0; failed: if (lsqlite3->sqlite != NULL) { (void) sqlite3_close(lsqlite3->sqlite); } talloc_free(lsqlite3); return -1; }