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Diffstat (limited to 'source4/lib/ldb/common/ldb_ldif.c')
-rw-r--r--source4/lib/ldb/common/ldb_ldif.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/source4/lib/ldb/common/ldb_ldif.c b/source4/lib/ldb/common/ldb_ldif.c
new file mode 100644
index 0000000000..198c984823
--- /dev/null
+++ b/source4/lib/ldb/common/ldb_ldif.c
@@ -0,0 +1,476 @@
+/*
+ ldb database library
+
+ Copyright (C) Andrew Tridgell 2004
+
+ ** 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: ldif routines
+ *
+ * Description: ldif pack/unpack routines
+ *
+ * Author: Andrew Tridgell
+ */
+
+#include "includes.h"
+
+
+/*
+ this base64 decoder was taken from jitterbug (written by tridge).
+ we might need to replace it with a new version
+*/
+static int base64_decode(char *s)
+{
+ const char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ int bit_offset, byte_offset, idx, i, n;
+ unsigned char *d = (unsigned char *)s;
+ char *p;
+
+ n=i=0;
+
+ while (*s && (p=strchr(b64,*s))) {
+ idx = (int)(p - b64);
+ byte_offset = (i*6)/8;
+ bit_offset = (i*6)%8;
+ d[byte_offset] &= ~((1<<(8-bit_offset))-1);
+ if (bit_offset < 3) {
+ d[byte_offset] |= (idx << (2-bit_offset));
+ n = byte_offset+1;
+ } else {
+ d[byte_offset] |= (idx >> (bit_offset-2));
+ d[byte_offset+1] = 0;
+ d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
+ n = byte_offset+2;
+ }
+ s++; i++;
+ }
+
+ if (*s && !p) {
+ /* the only termination allowed */
+ if (*s != '=') {
+ return -1;
+ }
+ }
+
+ /* null terminate */
+ d[n] = 0;
+ return n;
+}
+
+
+/*
+ encode as base64
+ caller frees
+*/
+char *ldb_base64_encode(const char *buf, int len)
+{
+ const char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ int bit_offset, byte_offset, idx, i;
+ unsigned char *d = (unsigned char *)buf;
+ int bytes = (len*8 + 5)/6;
+ char *out;
+
+ out = malloc(bytes+2);
+ if (!out) return NULL;
+
+ for (i=0;i<bytes;i++) {
+ byte_offset = (i*6)/8;
+ bit_offset = (i*6)%8;
+ if (bit_offset < 3) {
+ idx = (d[byte_offset] >> (2-bit_offset)) & 0x3F;
+ } else {
+ idx = (d[byte_offset] << (bit_offset-2)) & 0x3F;
+ if (byte_offset+1 < len) {
+ idx |= (d[byte_offset+1] >> (8-(bit_offset-2)));
+ }
+ }
+ out[i] = b64[idx];
+ }
+
+ out[i++] = '=';
+ out[i] = 0;
+
+ return out;
+}
+
+/*
+ see if a buffer should be base64 encoded
+*/
+int ldb_should_b64_encode(const struct ldb_val *val)
+{
+ int i;
+ unsigned char *p = val->data;
+
+ if (val->length == 0 || p[0] == ' ' || p[0] == ':') {
+ return 1;
+ }
+
+ for (i=0; i<val->length; i++) {
+ if (!isprint(p[i]) || p[i] == '\n') {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/* this macro is used to handle the return checking on fprintf_fn() */
+#define CHECK_RET do { if (ret < 0) return ret; total += ret; } while (0)
+
+/*
+ write a line folded string onto a file
+*/
+static int fold_string(int (*fprintf_fn)(void *, const char *, ...), void *private,
+ const char *buf, size_t length, int start_pos)
+{
+ int i;
+ int total=0, ret;
+
+ for (i=0;i<length;i++) {
+ ret = fprintf_fn(private, "%c", buf[i]);
+ CHECK_RET;
+ if (i != (length-1) && (i + start_pos) % 77 == 0) {
+ ret = fprintf_fn(private, "\n ");
+ CHECK_RET;
+ }
+ }
+
+ return total;
+}
+
+/*
+ encode as base64 to a file
+*/
+static int base64_encode_f(int (*fprintf_fn)(void *, const char *, ...), void *private,
+ const char *buf, int len, int start_pos)
+{
+ char *b = ldb_base64_encode(buf, len);
+ int ret;
+
+ if (!b) {
+ return -1;
+ }
+
+ ret = fold_string(fprintf_fn, private, b, strlen(b), start_pos);
+
+ free(b);
+ return ret;
+}
+
+/*
+ write to ldif, using a caller supplied write method
+*/
+int ldif_write(int (*fprintf_fn)(void *, const char *, ...),
+ void *private,
+ const struct ldb_message *msg)
+{
+ int i;
+ int total=0, ret;
+
+ ret = fprintf_fn(private, "dn: %s\n", msg->dn);
+ CHECK_RET;
+
+ for (i=0;i<msg->num_elements;i++) {
+ if (ldb_should_b64_encode(&msg->elements[i].value)) {
+ ret = fprintf_fn(private, "%s:: ", msg->elements[i].name);
+ CHECK_RET;
+ ret = base64_encode_f(fprintf_fn, private,
+ msg->elements[i].value.data,
+ msg->elements[i].value.length,
+ strlen(msg->elements[i].name)+3);
+ CHECK_RET;
+ ret = fprintf_fn(private, "\n");
+ CHECK_RET;
+ } else {
+ ret = fprintf_fn(private, "%s: ", msg->elements[i].name);
+ CHECK_RET;
+ ret = fold_string(fprintf_fn, private,
+ msg->elements[i].value.data,
+ msg->elements[i].value.length,
+ strlen(msg->elements[i].name)+2);
+ CHECK_RET;
+ ret = fprintf_fn(private, "\n");
+ CHECK_RET;
+ }
+ }
+ ret = fprintf_fn(private,"\n");
+ CHECK_RET;
+
+ return total;
+}
+
+#undef CHECK_RET
+
+
+/*
+ pull a ldif chunk, which is defined as a piece of data ending in \n\n or EOF
+ this routine removes any RFC2849 continuations and comments
+
+ caller frees
+*/
+static char *next_chunk(int (*fgetc_fn)(void *), void *private)
+{
+ size_t alloc_size=0, chunk_size = 0;
+ char *chunk = NULL;
+ int c;
+ int in_comment = 0;
+
+ while ((c = fgetc_fn(private)) != EOF) {
+ if (chunk_size == alloc_size) {
+ char *c2;
+ alloc_size += 1024;
+ c2 = realloc_p(chunk, char, alloc_size);
+ if (!c2) {
+ free(chunk);
+ errno = ENOMEM;
+ return NULL;
+ }
+ chunk = c2;
+ }
+
+ if (in_comment) {
+ if (c == '\n') {
+ in_comment = 0;
+ }
+ continue;
+ }
+
+ /* handle continuation lines - see RFC2849 */
+ if (c == ' ' && chunk_size > 1 && chunk[chunk_size-1] == '\n') {
+ chunk_size--;
+ continue;
+ }
+
+ /* chunks are terminated by a double line-feed */
+ if (c == '\n' && chunk_size > 0 && chunk[chunk_size-1] == '\n') {
+ chunk[chunk_size-1] = 0;
+ return chunk;
+ }
+
+ if (c == '#' && (chunk_size == 0 || chunk[chunk_size-1] == '\n')) {
+ in_comment = 1;
+ continue;
+ }
+
+ /* ignore leading blank lines */
+ if (chunk_size == 0 && c == '\n') {
+ continue;
+ }
+
+ chunk[chunk_size++] = c;
+ }
+
+ return chunk;
+}
+
+
+/* simple ldif attribute parser */
+static int next_attr(char **s, char **attr, struct ldb_val *value)
+{
+ char *p;
+ int base64_encoded = 0;
+
+ p = strchr(*s, ':');
+ if (!p) {
+ return -1;
+ }
+
+ *p++ = 0;
+
+ if (*p == ':') {
+ base64_encoded = 1;
+ p++;
+ }
+
+ *attr = *s;
+
+ while (isspace(*p)) {
+ p++;
+ }
+
+ value->data = p;
+
+ p = strchr(p, '\n');
+
+ if (!p) {
+ value->length = strlen((char *)value->data);
+ *s = ((char *)value->data) + value->length;
+ } else {
+ value->length = p - (char *)value->data;
+ *s = p+1;
+ *p = 0;
+ }
+
+ if (base64_encoded) {
+ int len = base64_decode(value->data);
+ if (len == -1) {
+ /* it wasn't valid base64 data */
+ return -1;
+ }
+ value->length = len;
+ }
+
+ return 0;
+}
+
+
+/*
+ free a message from a ldif_read
+*/
+void ldif_read_free(struct ldb_message *msg)
+{
+ if (msg->elements) free(msg->elements);
+ if (msg->private) free(msg->private);
+ free(msg);
+}
+
+/*
+ read from a LDIF source, creating a ldb_message
+*/
+struct ldb_message *ldif_read(int (*fgetc_fn)(void *), void *private)
+{
+ struct ldb_message *msg;
+ char *attr=NULL, *chunk=NULL, *s;
+ struct ldb_val value;
+
+ value.data = NULL;
+
+ msg = malloc_p(struct ldb_message);
+ if (!msg) return NULL;
+
+ msg->dn = NULL;
+ msg->elements = NULL;
+ msg->num_elements = 0;
+ msg->private = NULL;
+
+ chunk = next_chunk(fgetc_fn, private);
+ if (!chunk) {
+ goto failed;
+ }
+
+ msg->private = chunk;
+ s = chunk;
+
+ if (next_attr(&s, &attr, &value) != 0) {
+ goto failed;
+ }
+
+ /* first line must be a dn */
+ if (strcmp(attr, "dn") != 0) {
+ fprintf(stderr, "First line must be a dn not '%s'\n", attr);
+ goto failed;
+ }
+
+ msg->dn = value.data;
+
+ while (next_attr(&s, &attr, &value) == 0) {
+ msg->elements = realloc_p(msg->elements,
+ struct ldb_message_element,
+ msg->num_elements+1);
+ if (!msg->elements) {
+ goto failed;
+ }
+ msg->elements[msg->num_elements].flags = 0;
+ msg->elements[msg->num_elements].name = attr;
+ msg->elements[msg->num_elements].value = value;
+ msg->num_elements++;
+ }
+
+ return msg;
+
+failed:
+ if (msg) ldif_read_free(msg);
+ return NULL;
+}
+
+
+
+/*
+ a wrapper around ldif_read() for reading from FILE*
+*/
+struct ldif_read_file_state {
+ FILE *f;
+};
+
+static int fgetc_file(void *private)
+{
+ struct ldif_read_file_state *state = private;
+ return fgetc(state->f);
+}
+
+struct ldb_message *ldif_read_file(FILE *f)
+{
+ struct ldif_read_file_state state;
+ state.f = f;
+ return ldif_read(fgetc_file, &state);
+}
+
+
+/*
+ a wrapper around ldif_read() for reading from const char*
+*/
+struct ldif_read_string_state {
+ const char *s;
+};
+
+static int fgetc_string(void *private)
+{
+ struct ldif_read_string_state *state = private;
+ if (state->s[0] != 0) {
+ return *state->s++;
+ }
+ return EOF;
+}
+
+struct ldb_message *ldif_read_string(const char *s)
+{
+ struct ldif_read_string_state state;
+ state.s = s;
+ return ldif_read(fgetc_string, &state);
+}
+
+
+/*
+ wrapper around ldif_write() for a file
+*/
+struct ldif_write_file_state {
+ FILE *f;
+};
+
+static int fprintf_file(void *private, const char *fmt, ...)
+{
+ struct ldif_write_file_state *state = private;
+ int ret;
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = vfprintf(state->f, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
+int ldif_write_file(FILE *f, const struct ldb_message *msg)
+{
+ struct ldif_write_file_state state;
+ state.f = f;
+ return ldif_write(fprintf_file, &state, msg);
+}
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