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-rw-r--r--source3/lib/charcnv.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/source3/lib/charcnv.c b/source3/lib/charcnv.c
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+++ b/source3/lib/charcnv.c
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+/*
+ Unix SMB/CIFS implementation.
+ Character set conversion Extensions
+ Copyright (C) Igor Vergeichik <iverg@mail.ru> 2001
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Simo Sorce 2001
+ Copyright (C) Martin Pool 2003
+
+ 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; either version 3 of the License, or
+ (at your option) any later version.
+
+ 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, see <http://www.gnu.org/licenses/>.
+
+*/
+#include "includes.h"
+
+/**
+ * Destroy global objects allocated by init_iconv()
+ **/
+void gfree_charcnv(void)
+{
+ free_iconv_handle();
+}
+
+/**
+ * Copy a string from a char* unix src to a dos codepage string destination.
+ *
+ * @return the number of bytes occupied by the string in the destination.
+ *
+ * @param flags can include
+ * <dl>
+ * <dt>STR_TERMINATE</dt> <dd>means include the null termination</dd>
+ * <dt>STR_UPPER</dt> <dd>means uppercase in the destination</dd>
+ * </dl>
+ *
+ * @param dest_len the maximum length in bytes allowed in the
+ * destination.
+ **/
+size_t push_ascii(void *dest, const char *src, size_t dest_len, int flags)
+{
+ size_t src_len = 0;
+ char *tmpbuf = NULL;
+ size_t size = 0;
+ bool ret;
+
+ /* No longer allow a length of -1. */
+ if (dest_len == (size_t)-1) {
+ smb_panic("push_ascii - dest_len == -1");
+ }
+
+ if (flags & STR_UPPER) {
+ tmpbuf = SMB_STRDUP(src);
+ if (!tmpbuf) {
+ smb_panic("malloc fail");
+ }
+ if (!strupper_m(tmpbuf)) {
+ if ((flags & (STR_TERMINATE|STR_TERMINATE_ASCII)) &&
+ dest &&
+ dest_len > 0) {
+ *(char *)dest = 0;
+ }
+ SAFE_FREE(tmpbuf);
+ return 0;
+ }
+ src = tmpbuf;
+ }
+
+ src_len = strlen(src);
+ if (flags & (STR_TERMINATE | STR_TERMINATE_ASCII)) {
+ src_len++;
+ }
+
+ ret = convert_string(CH_UNIX, CH_DOS, src, src_len, dest, dest_len, &size);
+ SAFE_FREE(tmpbuf);
+ if (ret == false) {
+ if ((flags & (STR_TERMINATE | STR_TERMINATE_ASCII)) &&
+ dest_len > 0) {
+ ((char *)dest)[0] = '\0';
+ }
+ return 0;
+ }
+ return size;
+}
+
+/********************************************************************
+ Push and malloc an ascii string. src and dest null terminated.
+********************************************************************/
+
+/**
+ * Copy a string from a dos codepage source to a unix char* destination.
+ *
+ * The resulting string in "dest" is always null terminated.
+ *
+ * @param flags can have:
+ * <dl>
+ * <dt>STR_TERMINATE</dt>
+ * <dd>STR_TERMINATE means the string in @p src
+ * is null terminated, and src_len is ignored.</dd>
+ * </dl>
+ *
+ * @param src_len is the length of the source area in bytes.
+ * @returns the number of bytes occupied by the string in @p src.
+ **/
+size_t pull_ascii(char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
+{
+ bool ret;
+ size_t size = 0;
+
+ if (dest_len == (size_t)-1) {
+ /* No longer allow dest_len of -1. */
+ smb_panic("pull_ascii - invalid dest_len of -1");
+ }
+
+ if (flags & STR_TERMINATE) {
+ if (src_len == (size_t)-1) {
+ src_len = strlen((const char *)src) + 1;
+ } else {
+ size_t len = strnlen((const char *)src, src_len);
+ if (len < src_len)
+ len++;
+ src_len = len;
+ }
+ }
+
+ ret = convert_string(CH_DOS, CH_UNIX, src, src_len, dest, dest_len, &size);
+ if (ret == false) {
+ size = 0;
+ dest_len = 0;
+ }
+
+ if (dest_len && size) {
+ /* Did we already process the terminating zero ? */
+ if (dest[MIN(size-1, dest_len-1)] != 0) {
+ dest[MIN(size, dest_len-1)] = 0;
+ }
+ } else {
+ dest[0] = 0;
+ }
+
+ return src_len;
+}
+
+/**
+ * Copy a string from a dos codepage source to a unix char* destination.
+ * Talloc version.
+ *
+ * The resulting string in "dest" is always null terminated.
+ *
+ * @param flags can have:
+ * <dl>
+ * <dt>STR_TERMINATE</dt>
+ * <dd>STR_TERMINATE means the string in @p src
+ * is null terminated, and src_len is ignored.</dd>
+ * </dl>
+ *
+ * @param src_len is the length of the source area in bytes.
+ * @returns the number of bytes occupied by the string in @p src.
+ **/
+
+static size_t pull_ascii_base_talloc(TALLOC_CTX *ctx,
+ char **ppdest,
+ const void *src,
+ size_t src_len,
+ int flags)
+{
+ char *dest = NULL;
+ size_t dest_len;
+
+ *ppdest = NULL;
+
+ if (!src_len) {
+ return 0;
+ }
+
+ if (src_len == (size_t)-1) {
+ smb_panic("src_len == -1 in pull_ascii_base_talloc");
+ }
+
+ if (flags & STR_TERMINATE) {
+ size_t len = strnlen((const char *)src, src_len);
+ if (len < src_len)
+ len++;
+ src_len = len;
+ /* Ensure we don't use an insane length from the client. */
+ if (src_len >= 1024*1024) {
+ char *msg = talloc_asprintf(ctx,
+ "Bad src length (%u) in "
+ "pull_ascii_base_talloc",
+ (unsigned int)src_len);
+ smb_panic(msg);
+ }
+ }
+
+ /* src_len != -1 here. */
+
+ if (!convert_string_talloc(ctx, CH_DOS, CH_UNIX, src, src_len, &dest,
+ &dest_len)) {
+ dest_len = 0;
+ }
+
+ if (dest_len && dest) {
+ /* Did we already process the terminating zero ? */
+ if (dest[dest_len-1] != 0) {
+ size_t size = talloc_get_size(dest);
+ /* Have we got space to append the '\0' ? */
+ if (size <= dest_len) {
+ /* No, realloc. */
+ dest = talloc_realloc(ctx, dest, char,
+ dest_len+1);
+ if (!dest) {
+ /* talloc fail. */
+ dest_len = (size_t)-1;
+ return 0;
+ }
+ }
+ /* Yay - space ! */
+ dest[dest_len] = '\0';
+ dest_len++;
+ }
+ } else if (dest) {
+ dest[0] = 0;
+ }
+
+ *ppdest = dest;
+ return src_len;
+}
+
+/**
+ * Copy a string from a char* src to a unicode destination.
+ *
+ * @returns the number of bytes occupied by the string in the destination.
+ *
+ * @param flags can have:
+ *
+ * <dl>
+ * <dt>STR_TERMINATE <dd>means include the null termination.
+ * <dt>STR_UPPER <dd>means uppercase in the destination.
+ * <dt>STR_NOALIGN <dd>means don't do alignment.
+ * </dl>
+ *
+ * @param dest_len is the maximum length allowed in the
+ * destination.
+ **/
+
+static size_t push_ucs2(const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags)
+{
+ size_t len=0;
+ size_t src_len;
+ size_t size = 0;
+ bool ret;
+
+ if (dest_len == (size_t)-1) {
+ /* No longer allow dest_len of -1. */
+ smb_panic("push_ucs2 - invalid dest_len of -1");
+ }
+
+ if (flags & STR_TERMINATE)
+ src_len = (size_t)-1;
+ else
+ src_len = strlen(src);
+
+ if (ucs2_align(base_ptr, dest, flags)) {
+ *(char *)dest = 0;
+ dest = (void *)((char *)dest + 1);
+ if (dest_len)
+ dest_len--;
+ len++;
+ }
+
+ /* ucs2 is always a multiple of 2 bytes */
+ dest_len &= ~1;
+
+ ret = convert_string(CH_UNIX, CH_UTF16LE, src, src_len, dest, dest_len, &size);
+ if (ret == false) {
+ if ((flags & STR_TERMINATE) &&
+ dest &&
+ dest_len) {
+ *(char *)dest = 0;
+ }
+ return len;
+ }
+
+ len += size;
+
+ if (flags & STR_UPPER) {
+ smb_ucs2_t *dest_ucs2 = (smb_ucs2_t *)dest;
+ size_t i;
+
+ /* We check for i < (size / 2) below as the dest string isn't null
+ terminated if STR_TERMINATE isn't set. */
+
+ for (i = 0; i < (size / 2) && i < (dest_len / 2) && dest_ucs2[i]; i++) {
+ smb_ucs2_t v = toupper_w(dest_ucs2[i]);
+ if (v != dest_ucs2[i]) {
+ dest_ucs2[i] = v;
+ }
+ }
+ }
+
+ return len;
+}
+
+/**
+ Copy a string from a ucs2 source to a unix char* destination.
+ Talloc version with a base pointer.
+ Uses malloc if TALLOC_CTX is NULL (this is a bad interface and
+ needs fixing. JRA).
+ Flags can have:
+ STR_TERMINATE means the string in src is null terminated.
+ STR_NOALIGN means don't try to align.
+ if STR_TERMINATE is set then src_len is ignored if it is -1.
+ src_len is the length of the source area in bytes
+ Return the number of bytes occupied by the string in src.
+ The resulting string in "dest" is always null terminated.
+**/
+
+static size_t pull_ucs2_base_talloc(TALLOC_CTX *ctx,
+ const void *base_ptr,
+ char **ppdest,
+ const void *src,
+ size_t src_len,
+ int flags)
+{
+ char *dest;
+ size_t dest_len;
+ size_t ucs2_align_len = 0;
+
+ *ppdest = NULL;
+
+#ifdef DEVELOPER
+ /* Ensure we never use the braindead "malloc" variant. */
+ if (ctx == NULL) {
+ smb_panic("NULL talloc CTX in pull_ucs2_base_talloc\n");
+ }
+#endif
+
+ if (!src_len) {
+ return 0;
+ }
+
+ if (src_len == (size_t)-1) {
+ /* no longer used anywhere, but worth checking */
+ smb_panic("sec_len == -1 in pull_ucs2_base_talloc");
+ }
+
+ if (ucs2_align(base_ptr, src, flags)) {
+ src = (const void *)((const char *)src + 1);
+ src_len--;
+ ucs2_align_len = 1;
+ }
+
+ if (flags & STR_TERMINATE) {
+ /* src_len -1 is the default for null terminated strings. */
+ size_t len = strnlen_w((const smb_ucs2_t *)src,
+ src_len/2);
+ if (len < src_len/2)
+ len++;
+ src_len = len*2;
+
+ /* Ensure we don't use an insane length from the client. */
+ if (src_len >= 1024*1024) {
+ smb_panic("Bad src length in pull_ucs2_base_talloc\n");
+ }
+ }
+
+ /* ucs2 is always a multiple of 2 bytes */
+ src_len &= ~1;
+
+ if (!convert_string_talloc(ctx, CH_UTF16LE, CH_UNIX, src, src_len,
+ (void *)&dest, &dest_len)) {
+ dest_len = 0;
+ }
+
+ if (dest_len) {
+ /* Did we already process the terminating zero ? */
+ if (dest[dest_len-1] != 0) {
+ size_t size = talloc_get_size(dest);
+ /* Have we got space to append the '\0' ? */
+ if (size <= dest_len) {
+ /* No, realloc. */
+ dest = talloc_realloc(ctx, dest, char,
+ dest_len+1);
+ if (!dest) {
+ /* talloc fail. */
+ dest_len = (size_t)-1;
+ return 0;
+ }
+ }
+ /* Yay - space ! */
+ dest[dest_len] = '\0';
+ dest_len++;
+ }
+ } else if (dest) {
+ dest[0] = 0;
+ }
+
+ *ppdest = dest;
+ return src_len + ucs2_align_len;
+}
+
+/**
+ Copy a string from a char* src to a unicode or ascii
+ dos codepage destination choosing unicode or ascii based on the
+ flags supplied
+ Return the number of bytes occupied by the string in the destination.
+ flags can have:
+ STR_TERMINATE means include the null termination.
+ STR_UPPER means uppercase in the destination.
+ STR_ASCII use ascii even with unicode packet.
+ STR_NOALIGN means don't do alignment.
+ dest_len is the maximum length allowed in the destination. If dest_len
+ is -1 then no maximum is used.
+**/
+
+size_t push_string_check_fn(void *dest, const char *src,
+ size_t dest_len, int flags)
+{
+ if (!(flags & STR_ASCII) && (flags & STR_UNICODE)) {
+ return push_ucs2(NULL, dest, src, dest_len, flags);
+ }
+ return push_ascii(dest, src, dest_len, flags);
+}
+
+
+/**
+ Copy a string from a char* src to a unicode or ascii
+ dos codepage destination choosing unicode or ascii based on the
+ flags in the SMB buffer starting at base_ptr.
+ Return the number of bytes occupied by the string in the destination.
+ flags can have:
+ STR_TERMINATE means include the null termination.
+ STR_UPPER means uppercase in the destination.
+ STR_ASCII use ascii even with unicode packet.
+ STR_NOALIGN means don't do alignment.
+ dest_len is the maximum length allowed in the destination. If dest_len
+ is -1 then no maximum is used.
+**/
+
+size_t push_string_base(const char *base, uint16_t flags2,
+ void *dest, const char *src,
+ size_t dest_len, int flags)
+{
+
+ if (!(flags & STR_ASCII) && \
+ ((flags & STR_UNICODE || \
+ (flags2 & FLAGS2_UNICODE_STRINGS)))) {
+ return push_ucs2(base, dest, src, dest_len, flags);
+ }
+ return push_ascii(dest, src, dest_len, flags);
+}
+
+/**
+ Copy a string from a unicode or ascii source (depending on
+ the packet flags) to a char* destination.
+ Variant that uses talloc.
+ Flags can have:
+ STR_TERMINATE means the string in src is null terminated.
+ STR_UNICODE means to force as unicode.
+ STR_ASCII use ascii even with unicode packet.
+ STR_NOALIGN means don't do alignment.
+ if STR_TERMINATE is set then src_len is ignored is it is -1
+ src_len is the length of the source area in bytes.
+ Return the number of bytes occupied by the string in src.
+ The resulting string in "dest" is always null terminated.
+**/
+
+size_t pull_string_talloc(TALLOC_CTX *ctx,
+ const void *base_ptr,
+ uint16_t smb_flags2,
+ char **ppdest,
+ const void *src,
+ size_t src_len,
+ int flags)
+{
+ if ((base_ptr == NULL) && ((flags & (STR_ASCII|STR_UNICODE)) == 0)) {
+ smb_panic("No base ptr to get flg2 and neither ASCII nor "
+ "UNICODE defined");
+ }
+
+ if (!(flags & STR_ASCII) && \
+ ((flags & STR_UNICODE || \
+ (smb_flags2 & FLAGS2_UNICODE_STRINGS)))) {
+ return pull_ucs2_base_talloc(ctx,
+ base_ptr,
+ ppdest,
+ src,
+ src_len,
+ flags);
+ }
+ return pull_ascii_base_talloc(ctx,
+ ppdest,
+ src,
+ src_len,
+ flags);
+}
+
+/*******************************************************************
+ Write a string in (little-endian) unicode format. src is in
+ the current DOS codepage. len is the length in bytes of the
+ string pointed to by dst.
+
+ if null_terminate is True then null terminate the packet (adds 2 bytes)
+
+ the return value is the length in bytes consumed by the string, including the
+ null termination if applied
+********************************************************************/
+
+size_t dos_PutUniCode(char *dst,const char *src, size_t len, bool null_terminate)
+{
+ int flags = null_terminate ? STR_UNICODE|STR_NOALIGN|STR_TERMINATE
+ : STR_UNICODE|STR_NOALIGN;
+ return push_ucs2(NULL, dst, src, len, flags);
+}
+
+
+/* Converts a string from internal samba format to unicode. Always terminates.
+ * Actually just a wrapper round push_ucs2_talloc().
+ */
+
+int rpcstr_push_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src)
+{
+ size_t size;
+ if (push_ucs2_talloc(ctx, dest, src, &size))
+ return size;
+ else
+ return -1;
+}
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