--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ minimal iconv implementation
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Jelmer Vernooij 2002,2003
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/*
+ * We have to use strcasecmp here as the character conversions
+ * haven't been initialised yet. JRA.
+ */
+
+#undef strcasecmp
+
+/**
+ * @file
+ *
+ * @brief Samba wrapper/stub for iconv character set conversion.
+ *
+ * iconv is the XPG2 interface for converting between character
+ * encodings. This file provides a Samba wrapper around it, and also
+ * a simple reimplementation that is used if the system does not
+ * implement iconv.
+ *
+ * Samba only works with encodings that are supersets of ASCII: ascii
+ * characters like whitespace can be tested for directly, multibyte
+ * sequences start with a byte with the high bit set, and strings are
+ * terminated by a nul byte.
+ *
+ * Note that the only function provided by iconv is conversion between
+ * characters. It doesn't directly support operations like
+ * uppercasing or comparison. We have to convert to UCS-2 and compare
+ * there.
+ *
+ * @sa Samba Developers Guide
+ **/
+
+static size_t ascii_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t ascii_push(void *,const char **, size_t *, char **, size_t *);
+static size_t latin1_push(void *,const char **, size_t *, char **, size_t *);
+static size_t utf8_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t utf8_push(void *,const char **, size_t *, char **, size_t *);
+static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *);
+static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *);
+static size_t iconv_copy(void *,const char **, size_t *, char **, size_t *);
+static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *);
+
+static struct charset_functions builtin_functions[] = {
+ /* windows is really neither UCS-2 not UTF-16 */
+ {"UCS-2LE", iconv_copy, iconv_copy},
+ {"UTF-16LE", iconv_copy, iconv_copy},
+ {"UCS-2BE", iconv_swab, iconv_swab},
+ {"UTF-16BE", iconv_swab, iconv_swab},
+
+ /* we include the UTF-8 alias to cope with differing locale settings */
+ {"UTF8", utf8_pull, utf8_push},
+ {"UTF-8", utf8_pull, utf8_push},
+ {"ASCII", ascii_pull, ascii_push},
+ {"646", ascii_pull, ascii_push},
+ {"ISO-8859-1", ascii_pull, latin1_push},
+ {"UCS2-HEX", ucs2hex_pull, ucs2hex_push},
+ {NULL, NULL, NULL}
+};
+
+static struct charset_functions *charsets = NULL;
+
+static struct charset_functions *find_charset_functions(const char *name)
+{
+ struct charset_functions *c = charsets;
+
+ while(c) {
+ if (strcasecmp(name, c->name) == 0) {
+ return c;
+ }
+ c = c->next;
+ }
+
+ return NULL;
+}
+
+NTSTATUS smb_register_charset(struct charset_functions *funcs)
+{
+ if (!funcs) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ DEBUG(5, ("Attempting to register new charset %s\n", funcs->name));
+ /* Check whether we already have this charset... */
+ if (find_charset_functions(funcs->name)) {
+ DEBUG(0, ("Duplicate charset %s, not registering\n", funcs->name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ funcs->next = funcs->prev = NULL;
+ DEBUG(5, ("Registered charset %s\n", funcs->name));
+ DLIST_ADD(charsets, funcs);
+ return NT_STATUS_OK;
+}
+
+static void lazy_initialize_iconv(void)
+{
+ static BOOL initialized;
+ int i;
+
+ if (!initialized) {
+ initialized = True;
+ for(i = 0; builtin_functions[i].name; i++)
+ smb_register_charset(&builtin_functions[i]);
+ static_init_charset;
+ }
+}
+
+/* if there was an error then reset the internal state,
+ this ensures that we don't have a shift state remaining for
+ character sets like SJIS */
+static size_t sys_iconv(void *cd,
+ const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+#ifdef HAVE_NATIVE_ICONV
+ size_t ret = iconv((iconv_t)cd,
+ (char **)inbuf, inbytesleft,
+ outbuf, outbytesleft);
+ if (ret == (size_t)-1) {
+ int saved_errno = errno;
+ iconv(cd, NULL, NULL, NULL, NULL);
+ errno = saved_errno;
+ }
+ return ret;
+#else
+ errno = EINVAL;
+ return -1;
+#endif
+}
+
+/**
+ * This is a simple portable iconv() implementaion.
+ *
+ * It only knows about a very small number of character sets - just
+ * enough that Samba works on systems that don't have iconv.
+ **/
+size_t smb_iconv(smb_iconv_t cd,
+ const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ char cvtbuf[2048];
+ char *bufp = cvtbuf;
+ size_t bufsize;
+
+ /* in many cases we can go direct */
+ if (cd->direct) {
+ return cd->direct(cd->cd_direct,
+ inbuf, inbytesleft, outbuf, outbytesleft);
+ }
+
+
+ /* otherwise we have to do it chunks at a time */
+ while (*inbytesleft > 0) {
+ bufp = cvtbuf;
+ bufsize = sizeof(cvtbuf);
+
+ if (cd->pull(cd->cd_pull,
+ inbuf, inbytesleft, &bufp, &bufsize) == -1
+ && errno != E2BIG) return -1;
+
+ bufp = cvtbuf;
+ bufsize = sizeof(cvtbuf) - bufsize;
+
+ if (cd->push(cd->cd_push,
+ (const char **)&bufp, &bufsize,
+ outbuf, outbytesleft) == -1) return -1;
+ }
+
+ return 0;
+}
+
+
+static BOOL is_utf16(const char *name)
+{
+ return strcasecmp(name, "UCS-2LE") == 0 ||
+ strcasecmp(name, "UTF-16LE") == 0;
+}
+
+/*
+ simple iconv_open() wrapper
+ */
+smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
+{
+ smb_iconv_t ret;
+ struct charset_functions *from, *to;
+
+ lazy_initialize_iconv();
+ from = charsets;
+ to = charsets;
+
+ ret = SMB_MALLOC_P(struct _smb_iconv_t);
+ if (!ret) {
+ errno = ENOMEM;
+ return (smb_iconv_t)-1;
+ }
+ memset(ret, 0, sizeof(struct _smb_iconv_t));
+
+ ret->from_name = SMB_STRDUP(fromcode);
+ ret->to_name = SMB_STRDUP(tocode);
+
+ /* check for the simplest null conversion */
+ if (strcasecmp(fromcode, tocode) == 0) {
+ ret->direct = iconv_copy;
+ return ret;
+ }
+
+ /* check if we have a builtin function for this conversion */
+ from = find_charset_functions(fromcode);
+ if(from)ret->pull = from->pull;
+
+ to = find_charset_functions(tocode);
+ if(to)ret->push = to->push;
+
+ /* check if we can use iconv for this conversion */
+#ifdef HAVE_NATIVE_ICONV
+ if (!ret->pull) {
+ ret->cd_pull = iconv_open("UTF-16LE", fromcode);
+ if (ret->cd_pull == (iconv_t)-1)
+ ret->cd_pull = iconv_open("UCS-2LE", fromcode);
+ if (ret->cd_pull != (iconv_t)-1)
+ ret->pull = sys_iconv;
+ }
+
+ if (!ret->push) {
+ ret->cd_push = iconv_open(tocode, "UTF-16LE");
+ if (ret->cd_push == (iconv_t)-1)
+ ret->cd_push = iconv_open(tocode, "UCS-2LE");
+ if (ret->cd_push != (iconv_t)-1)
+ ret->push = sys_iconv;
+ }
+#endif
+
+ /* check if there is a module available that can do this conversion */
+ if (!ret->pull && NT_STATUS_IS_OK(smb_probe_module("charset", fromcode))) {
+ if(!(from = find_charset_functions(fromcode)))
+ DEBUG(0, ("Module %s doesn't provide charset %s!\n", fromcode, fromcode));
+ else
+ ret->pull = from->pull;
+ }
+
+ if (!ret->push && NT_STATUS_IS_OK(smb_probe_module("charset", tocode))) {
+ if(!(to = find_charset_functions(tocode)))
+ DEBUG(0, ("Module %s doesn't provide charset %s!\n", tocode, tocode));
+ else
+ ret->push = to->push;
+ }
+
+ if (!ret->push || !ret->pull) {
+ SAFE_FREE(ret->from_name);
+ SAFE_FREE(ret->to_name);
+ SAFE_FREE(ret);
+ errno = EINVAL;
+ return (smb_iconv_t)-1;
+ }
+
+ /* check for conversion to/from ucs2 */
+ if (is_utf16(fromcode) && to) {
+ ret->direct = to->push;
+ ret->push = ret->pull = NULL;
+ return ret;
+ }
+
+ if (is_utf16(tocode) && from) {
+ ret->direct = from->pull;
+ ret->push = ret->pull = NULL;
+ return ret;
+ }
+
+ /* Check if we can do the conversion direct */
+#ifdef HAVE_NATIVE_ICONV
+ if (is_utf16(fromcode)) {
+ ret->direct = sys_iconv;
+ ret->cd_direct = ret->cd_push;
+ ret->cd_push = NULL;
+ return ret;
+ }
+ if (is_utf16(tocode)) {
+ ret->direct = sys_iconv;
+ ret->cd_direct = ret->cd_pull;
+ ret->cd_pull = NULL;
+ return ret;
+ }
+#endif
+
+ return ret;
+}
+
+/*
+ simple iconv_close() wrapper
+*/
+int smb_iconv_close (smb_iconv_t cd)
+{
+#ifdef HAVE_NATIVE_ICONV
+ if (cd->cd_direct) iconv_close((iconv_t)cd->cd_direct);
+ if (cd->cd_pull) iconv_close((iconv_t)cd->cd_pull);
+ if (cd->cd_push) iconv_close((iconv_t)cd->cd_push);
+#endif
+
+ SAFE_FREE(cd->from_name);
+ SAFE_FREE(cd->to_name);
+
+ memset(cd, 0, sizeof(*cd));
+ SAFE_FREE(cd);
+ return 0;
+}
+
+
+/**********************************************************************
+ the following functions implement the builtin character sets in Samba
+ and also the "test" character sets that are designed to test
+ multi-byte character set support for english users
+***********************************************************************/
+
+static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+ (*outbuf)[0] = (*inbuf)[0];
+ (*outbuf)[1] = 0;
+ (*inbytesleft) -= 1;
+ (*outbytesleft) -= 2;
+ (*inbuf) += 1;
+ (*outbuf) += 2;
+ }
+
+ if (*inbytesleft > 0) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int ir_count=0;
+
+ while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+ (*outbuf)[0] = (*inbuf)[0] & 0x7F;
+ if ((*inbuf)[1]) ir_count++;
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= 1;
+ (*inbuf) += 2;
+ (*outbuf) += 1;
+ }
+
+ if (*inbytesleft == 1) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*inbytesleft > 1) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return ir_count;
+}
+
+static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int ir_count=0;
+
+ while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+ (*outbuf)[0] = (*inbuf)[0];
+ if ((*inbuf)[1]) ir_count++;
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= 1;
+ (*inbuf) += 2;
+ (*outbuf) += 1;
+ }
+
+ if (*inbytesleft == 1) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*inbytesleft > 1) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return ir_count;
+}
+
+static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+ unsigned v;
+
+ if ((*inbuf)[0] != '@') {
+ /* seven bit ascii case */
+ (*outbuf)[0] = (*inbuf)[0];
+ (*outbuf)[1] = 0;
+ (*inbytesleft) -= 1;
+ (*outbytesleft) -= 2;
+ (*inbuf) += 1;
+ (*outbuf) += 2;
+ continue;
+ }
+ /* it's a hex character */
+ if (*inbytesleft < 5) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (sscanf(&(*inbuf)[1], "%04x", &v) != 1) {
+ errno = EILSEQ;
+ return -1;
+ }
+
+ (*outbuf)[0] = v&0xff;
+ (*outbuf)[1] = v>>8;
+ (*inbytesleft) -= 5;
+ (*outbytesleft) -= 2;
+ (*inbuf) += 5;
+ (*outbuf) += 2;
+ }
+
+ if (*inbytesleft > 0) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+ char buf[6];
+
+ if ((*inbuf)[1] == 0 &&
+ ((*inbuf)[0] & 0x80) == 0 &&
+ (*inbuf)[0] != '@') {
+ (*outbuf)[0] = (*inbuf)[0];
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= 1;
+ (*inbuf) += 2;
+ (*outbuf) += 1;
+ continue;
+ }
+ if (*outbytesleft < 5) {
+ errno = E2BIG;
+ return -1;
+ }
+ snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0));
+ memcpy(*outbuf, buf, 5);
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= 5;
+ (*inbuf) += 2;
+ (*outbuf) += 5;
+ }
+
+ if (*inbytesleft == 1) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*inbytesleft > 1) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t iconv_swab(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int n;
+
+ n = MIN(*inbytesleft, *outbytesleft);
+
+ swab(*inbuf, *outbuf, (n&~1));
+ if (n&1) {
+ (*outbuf)[n-1] = 0;
+ }
+
+ (*inbytesleft) -= n;
+ (*outbytesleft) -= n;
+ (*inbuf) += n;
+ (*outbuf) += n;
+
+ if (*inbytesleft > 0) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int n;
+
+ n = MIN(*inbytesleft, *outbytesleft);
+
+ memmove(*outbuf, *inbuf, n);
+
+ (*inbytesleft) -= n;
+ (*outbytesleft) -= n;
+ (*inbuf) += n;
+ (*outbuf) += n;
+
+ if (*inbytesleft > 0) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ size_t in_left=*inbytesleft, out_left=*outbytesleft;
+ const uint8 *c = (const uint8 *)*inbuf;
+ uint8 *uc = (uint8 *)*outbuf;
+
+ while (in_left >= 1 && out_left >= 2) {
+ if ((c[0] & 0x80) == 0) {
+ uc[0] = c[0];
+ uc[1] = 0;
+ c += 1;
+ in_left -= 1;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xe0) == 0xc0) {
+ if (in_left < 2 ||
+ (c[1] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
+ }
+ uc[1] = (c[0]>>2) & 0x7;
+ uc[0] = (c[0]<<6) | (c[1]&0x3f);
+ c += 2;
+ in_left -= 2;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xf0) == 0xe0) {
+ if (in_left < 3 ||
+ (c[1] & 0xc0) != 0x80 ||
+ (c[2] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
+ }
+ uc[1] = ((c[0]&0xF)<<4) | ((c[1]>>2)&0xF);
+ uc[0] = (c[1]<<6) | (c[2]&0x3f);
+ c += 3;
+ in_left -= 3;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xf8) == 0xf0) {
+ unsigned int codepoint;
+ if (in_left < 4 ||
+ (c[1] & 0xc0) != 0x80 ||
+ (c[2] & 0xc0) != 0x80 ||
+ (c[3] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
+ }
+ codepoint =
+ (c[3]&0x3f) |
+ ((c[2]&0x3f)<<6) |
+ ((c[1]&0x3f)<<12) |
+ ((c[0]&0x7)<<18);
+ if (codepoint < 0x10000) {
+ /* accept UTF-8 characters that are not
+ minimally packed, but pack the result */
+ uc[0] = (codepoint & 0xFF);
+ uc[1] = (codepoint >> 8);
+ c += 4;
+ in_left -= 4;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ codepoint -= 0x10000;
+
+ if (out_left < 4) {
+ errno = E2BIG;
+ goto error;
+ }
+
+ uc[0] = (codepoint>>10) & 0xFF;
+ uc[1] = (codepoint>>18) | 0xd8;
+ uc[2] = codepoint & 0xFF;
+ uc[3] = ((codepoint>>8) & 0x3) | 0xdc;
+ c += 4;
+ in_left -= 4;
+ out_left -= 4;
+ uc += 4;
+ continue;
+ }
+
+ /* we don't handle 5 byte sequences */
+ errno = EINVAL;
+ goto error;
+ }
+
+ if (in_left > 0) {
+ errno = E2BIG;
+ goto error;
+ }
+
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = (char *)c;
+ *outbuf = (char *)uc;
+ return 0;
+
+error:
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = (char *)c;
+ *outbuf = (char *)uc;
+ return -1;
+}
+
+static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ size_t in_left=*inbytesleft, out_left=*outbytesleft;
+ uint8 *c = (uint8 *)*outbuf;
+ const uint8 *uc = (const uint8 *)*inbuf;
+
+ while (in_left >= 2 && out_left >= 1) {
+ unsigned int codepoint;
+
+ if (uc[1] == 0 && !(uc[0] & 0x80)) {
+ /* simplest case */
+ c[0] = uc[0];
+ in_left -= 2;
+ out_left -= 1;
+ uc += 2;
+ c += 1;
+ continue;
+ }
+
+ if ((uc[1]&0xf8) == 0) {
+ /* next simplest case */
+ if (out_left < 2) {
+ errno = E2BIG;
+ goto error;
+ }
+ c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2);
+ c[1] = 0x80 | (uc[0] & 0x3f);
+ in_left -= 2;
+ out_left -= 2;
+ uc += 2;
+ c += 2;
+ continue;
+ }
+
+ if ((uc[1] & 0xfc) == 0xdc) {
+ /* its the second part of a 4 byte sequence. Illegal */
+ if (in_left < 4) {
+ errno = EINVAL;
+ } else {
+ errno = EILSEQ;
+ }
+ goto error;
+ }
+
+ if ((uc[1] & 0xfc) != 0xd8) {
+ codepoint = uc[0] | (uc[1]<<8);
+ if (out_left < 3) {
+ errno = E2BIG;
+ goto error;
+ }
+ c[0] = 0xe0 | (codepoint >> 12);
+ c[1] = 0x80 | ((codepoint >> 6) & 0x3f);
+ c[2] = 0x80 | (codepoint & 0x3f);
+
+ in_left -= 2;
+ out_left -= 3;
+ uc += 2;
+ c += 3;
+ continue;
+ }
+
+ /* its the first part of a 4 byte sequence */
+ if (in_left < 4) {
+ errno = EINVAL;
+ goto error;
+ }
+ if ((uc[3] & 0xfc) != 0xdc) {
+ errno = EILSEQ;
+ goto error;
+ }
+ codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) |
+ (uc[0]<<10) | ((uc[1] & 0x3)<<18));
+
+ if (out_left < 4) {
+ errno = E2BIG;
+ goto error;
+ }
+ c[0] = 0xf0 | (codepoint >> 18);
+ c[1] = 0x80 | ((codepoint >> 12) & 0x3f);
+ c[2] = 0x80 | ((codepoint >> 6) & 0x3f);
+ c[3] = 0x80 | (codepoint & 0x3f);
+
+ in_left -= 4;
+ out_left -= 4;
+ uc += 4;
+ c += 4;
+ }
+
+ if (in_left == 1) {
+ errno = EINVAL;
+ goto error;
+ }
+
+ if (in_left > 1) {
+ errno = E2BIG;
+ goto error;
+ }
+
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = (char *)uc;
+ *outbuf = (char *)c;
+
+ return 0;
+
+error:
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = (char *)uc;
+ *outbuf = (char *)c;
+ return -1;
+}
+
projects / samba / blobdiff