/* Unix SMB/CIFS implementation. Character set conversion Extensions Copyright (C) Igor Vergeichik 2001 Copyright (C) Andrew Tridgell 2001 Copyright (C) Simo Sorce 2001 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" /** * @file * * @brief Character-set conversion routines built on our iconv. * * @note Samba's internal character set (at least in the 3.0 series) * is always the same as the one for the Unix filesystem. It is * not necessarily UTF-8 and may be different on machines that * need i18n filenames to be compatible with Unix software. It does * have to be a superset of ASCII. All multibyte sequences must start * with a byte with the high bit set. * * @sa lib/iconv.c */ static smb_iconv_t conv_handles[NUM_CHARSETS][NUM_CHARSETS]; /** * Return the name of a charset to give to iconv(). **/ static const char *charset_name(charset_t ch) { const char *ret = NULL; if (ch == CH_UCS2) ret = "UCS-2LE"; else if (ch == CH_UNIX) ret = lp_unix_charset(); else if (ch == CH_DOS) ret = lp_dos_charset(); else if (ch == CH_DISPLAY) ret = lp_display_charset(); else if (ch == CH_UTF8) ret = "UTF8"; else if (ch == CH_UCS2BE) ret = "UCS-2BE"; if (!ret || !*ret) ret = "ASCII"; return ret; } static void lazy_initialize_conv(void) { static int initialized = False; if (!initialized) { initialized = True; load_case_tables(); init_iconv(); init_valid_table(); } } /** Initialize iconv conversion descriptors. **/ void init_iconv(void) { int c1, c2; BOOL did_reload = False; /* so that charset_name() works we need to get the UNIX<->UCS2 going first */ if (!conv_handles[CH_UNIX][CH_UCS2]) conv_handles[CH_UNIX][CH_UCS2] = smb_iconv_open("UCS-2LE", "ASCII"); if (!conv_handles[CH_UCS2][CH_UNIX]) conv_handles[CH_UCS2][CH_UNIX] = smb_iconv_open("ASCII", "UCS-2LE"); for (c1=0;c1from_name) == 0 && strcmp(n2, conv_handles[c1][c2]->to_name) == 0) continue; did_reload = True; if (conv_handles[c1][c2]) smb_iconv_close(conv_handles[c1][c2]); conv_handles[c1][c2] = smb_iconv_open(n2,n1); if (conv_handles[c1][c2] == (smb_iconv_t)-1) { DEBUG(0,("Conversion from %s to %s not supported\n", charset_name((charset_t)c1), charset_name((charset_t)c2))); conv_handles[c1][c2] = NULL; } } } if (did_reload) { init_valid_table(); } } /** * Convert string from one encoding to another, making error checking etc * * @param src pointer to source string (multibyte or singlebyte) * @param srclen length of the source string in bytes * @param dest pointer to destination string (multibyte or singlebyte) * @param destlen maximal length allowed for string * @returns the number of bytes occupied in the destination **/ ssize_t convert_string(charset_t from, charset_t to, void const *src, size_t srclen, void *dest, size_t destlen) { size_t i_len, o_len; size_t retval; const char* inbuf = (const char*)src; char* outbuf = (char*)dest; smb_iconv_t descriptor; if (srclen == (size_t)-1) srclen = strlen(src)+1; lazy_initialize_conv(); descriptor = conv_handles[from][to]; if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) { /* conversion not supported, use as is */ size_t len = MIN(srclen,destlen); memcpy(dest,src,len); return len; } i_len=srclen; o_len=destlen; retval = smb_iconv(descriptor, &inbuf, &i_len, &outbuf, &o_len); if(retval==(size_t)-1) { const char *reason; switch(errno) { case EINVAL: reason="Incomplete multibyte sequence"; break; case E2BIG: reason="No more room"; DEBUG(0, ("convert_string: Required %d, available %d\n", srclen, destlen)); /* we are not sure we need srclen bytes, may be more, may be less. We only know we need more than destlen bytes ---simo */ break; case EILSEQ: reason="Illegal multibyte sequence"; break; } /* smb_panic(reason); */ } return destlen-o_len; } /** * Convert between character sets, allocating a new buffer for the result. * * @param srclen length of source buffer. * @param dest always set at least to NULL * @note -1 is not accepted for srclen. * * @returns Size in bytes of the converted string; or -1 in case of error. **/ ssize_t convert_string_allocate(charset_t from, charset_t to, void const *src, size_t srclen, void **dest) { size_t i_len, o_len, destlen; size_t retval; const char *inbuf = (const char *)src; char *outbuf, *ob; smb_iconv_t descriptor; *dest = NULL; if (src == NULL || srclen == (size_t)-1 || srclen == 0) return (size_t)-1; lazy_initialize_conv(); descriptor = conv_handles[from][to]; if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) { /* conversion not supported, return -1*/ DEBUG(3, ("convert_string_allocate: conversion not supported!\n")); return -1; } destlen = MAX(srclen, 512); outbuf = NULL; convert: destlen = destlen * 2; ob = (char *)realloc(outbuf, destlen); if (!ob) { DEBUG(0, ("convert_string_allocate: realloc failed!\n")); SAFE_FREE(outbuf); return (size_t)-1; } else outbuf = ob; i_len = srclen; o_len = destlen; retval = smb_iconv(descriptor, &inbuf, &i_len, &outbuf, &o_len); if(retval == (size_t)-1) { const char *reason="unknown error"; switch(errno) { case EINVAL: reason="Incomplete multibyte sequence"; break; case E2BIG: goto convert; case EILSEQ: reason="Illegal multibyte sequence"; break; } DEBUG(0,("Conversion error: %s(%s)\n",reason,inbuf)); /* smb_panic(reason); */ return (size_t)-1; } destlen = destlen - o_len; *dest = (char *)Realloc(ob,destlen); if (!*dest) { DEBUG(0, ("convert_string_allocate: out of memory!\n")); SAFE_FREE(ob); return (size_t)-1; } return destlen; } /** * Convert between character sets, allocating a new buffer using talloc for the result. * * @param srclen length of source buffer. * @param dest always set at least to NULL * @note -1 is not accepted for srclen. * * @returns Size in bytes of the converted string; or -1 in case of error. **/ ssize_t convert_string_talloc(TALLOC_CTX *ctx, charset_t from, charset_t to, void const *src, size_t srclen, const void **dest) { void *alloced_string; size_t dest_len; void *dst; *dest = NULL; dest_len=convert_string_allocate(from, to, src, srclen, &alloced_string); if (dest_len == (size_t)-1) return (size_t)-1; dst = talloc(ctx, dest_len + 2); /* we want to be absolutely sure that the result is terminated */ memcpy(dst, alloced_string, dest_len); SSVAL(dst, dest_len, 0); SAFE_FREE(alloced_string); if (dst == NULL) return -1; *dest = dst; return dest_len; } size_t unix_strupper(const char *src, size_t srclen, char *dest, size_t destlen) { size_t size; smb_ucs2_t *buffer; size = convert_string_allocate(CH_UNIX, CH_UCS2, src, srclen, (void **) &buffer); if (size == -1) { smb_panic("failed to create UCS2 buffer"); } if (!strupper_w(buffer) && (dest == src)) { free(buffer); return srclen; } size = convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen); free(buffer); return size; } size_t unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen) { size_t size; smb_ucs2_t *buffer; size = convert_string_allocate(CH_UNIX, CH_UCS2, src, srclen, (void **) &buffer); if (size == -1) { smb_panic("failed to create UCS2 buffer"); } if (!strlower_w(buffer) && (dest == src)) { free(buffer); return srclen; } size = convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen); free(buffer); return size; } size_t ucs2_align(const void *base_ptr, const void *p, int flags) { if (flags & (STR_NOALIGN|STR_ASCII)) return 0; return PTR_DIFF(p, base_ptr) & 1; } /** * 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 *
*
STR_TERMINATE
means include the null termination
*
STR_UPPER
means uppercase in the destination
*
* * @param dest_len the maximum length in bytes allowed in the * destination. If @p dest_len is -1 then no maximum is used. **/ ssize_t push_ascii(void *dest, const char *src, size_t dest_len, int flags) { size_t src_len = strlen(src); pstring tmpbuf; /* treat a pstring as "unlimited" length */ if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (flags & STR_UPPER) { pstrcpy(tmpbuf, src); strupper(tmpbuf); src = tmpbuf; } if (flags & (STR_TERMINATE | STR_TERMINATE_ASCII)) src_len++; return convert_string(CH_UNIX, CH_DOS, src, src_len, dest, dest_len); } ssize_t push_pstring(void *dest, const char *src) { return push_ascii(dest, src, sizeof(pstring), STR_TERMINATE); } /** * 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: *
*
STR_TERMINATE
*
STR_TERMINATE means the string in @p src * is null terminated, and src_len is ignored.
*
* * @param src_len is the length of the source area in bytes. * @returns the number of bytes occupied by the string in @p src. **/ ssize_t pull_ascii(char *dest, const void *src, size_t dest_len, size_t src_len, int flags) { size_t ret; if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (flags & (STR_TERMINATE | STR_TERMINATE_ASCII)) { if (src_len == (size_t)-1) { src_len = strlen(src) + 1; } else { size_t len = strnlen(src, src_len); if (len < src_len) len++; src_len = len; } } ret = convert_string(CH_DOS, CH_UNIX, src, src_len, dest, dest_len); if (dest_len) dest[MIN(ret, dest_len-1)] = 0; 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: * *
*
STR_TERMINATE
means include the null termination. *
STR_UPPER
means uppercase in the destination. *
STR_NOALIGN
means don't do alignment. *
* * @param dest_len is the maximum length allowed in the * destination. If dest_len is -1 then no maxiumum is used. **/ ssize_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 = strlen(src); pstring tmpbuf; /* treat a pstring as "unlimited" length */ if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (flags & STR_UPPER) { pstrcpy(tmpbuf, src); strupper(tmpbuf); src = tmpbuf; } if (flags & STR_TERMINATE) src_len++; 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; len += convert_string(CH_UNIX, CH_UCS2, src, src_len, dest, dest_len); return len; } /** * Copy a string from a unix char* src to a UCS2 destination, * allocating a buffer using talloc(). * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination * or -1 in case of error. **/ ssize_t push_ucs2_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_talloc(ctx, CH_UNIX, CH_UCS2, src, src_len, (const void **)dest); } /** * Copy a string from a unix char* src to a UCS2 destination, allocating a buffer * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination * or -1 in case of error. **/ ssize_t push_ucs2_allocate(smb_ucs2_t **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_allocate(CH_UNIX, CH_UCS2, src, src_len, (void **)dest); } /** Copy a string from a char* src to a UTF-8 destination. 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 dest_len is the maximum length allowed in the destination. If dest_len is -1 then no maxiumum is used. **/ ssize_t push_utf8(void *dest, const char *src, size_t dest_len, int flags) { size_t src_len = strlen(src); pstring tmpbuf; /* treat a pstring as "unlimited" length */ if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (flags & STR_UPPER) { pstrcpy(tmpbuf, src); strupper(tmpbuf); src = tmpbuf; } if (flags & STR_TERMINATE) src_len++; return convert_string(CH_UNIX, CH_UTF8, src, src_len, dest, dest_len); } /** * Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer using talloc * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t push_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_talloc(ctx, CH_UNIX, CH_UTF8, src, src_len, (const void **)dest); } /** * Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t push_utf8_allocate(char **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_allocate(CH_UNIX, CH_UTF8, src, src_len, (void **)dest); } /** Copy a string from a ucs2 source to a unix char* destination. 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. **/ size_t pull_ucs2(const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags) { size_t ret; if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (ucs2_align(base_ptr, src, flags)) { src = (const void *)((const char *)src + 1); if (src_len > 0) src_len--; } if (flags & STR_TERMINATE) { if (src_len == (size_t)-1) { src_len = strlen_w(src)*2 + 2; } else { size_t len = strnlen_w(src, src_len/2); if (len < src_len/2) len++; src_len = len*2; } } /* ucs2 is always a multiple of 2 bytes */ if (src_len != (size_t)-1) src_len &= ~1; ret = convert_string(CH_UCS2, CH_UNIX, src, src_len, dest, dest_len); if (dest_len) dest[MIN(ret, dest_len-1)] = 0; return src_len; } ssize_t pull_ucs2_pstring(char *dest, const void *src) { return pull_ucs2(NULL, dest, src, sizeof(pstring), -1, STR_TERMINATE); } /** * Copy a string from a UCS2 src to a unix char * destination, allocating a buffer using talloc * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t pull_ucs2_talloc(TALLOC_CTX *ctx, char **dest, const smb_ucs2_t *src) { size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t); *dest = NULL; return convert_string_talloc(ctx, CH_UCS2, CH_UNIX, src, src_len, (const void **)dest); } /** * Copy a string from a UCS2 src to a unix char * destination, allocating a buffer * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t pull_ucs2_allocate(void **dest, const smb_ucs2_t *src) { size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t); *dest = NULL; return convert_string_allocate(CH_UCS2, CH_UNIX, src, src_len, dest); } /** Copy a string from a utf-8 source to a unix char* destination. Flags can have: STR_TERMINATE means the string in src is null terminated. if STR_TERMINATE is set then src_len is ignored. 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. **/ ssize_t pull_utf8(char *dest, const void *src, size_t dest_len, size_t src_len, int flags) { size_t ret; if (dest_len == (size_t)-1) dest_len = sizeof(pstring); if (flags & STR_TERMINATE) { if (src_len == (size_t)-1) { src_len = strlen(src) + 1; } else { size_t len = strnlen(src, src_len); if (len < src_len) len++; src_len = len; } } ret = convert_string(CH_UTF8, CH_UNIX, src, src_len, dest, dest_len); if (dest_len) dest[MIN(ret, dest_len-1)] = 0; return src_len; } /** * Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer using talloc * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t pull_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_talloc(ctx, CH_UTF8, CH_UNIX, src, src_len, (const void **)dest); } /** * Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer * * @param dest always set at least to NULL * * @returns The number of bytes occupied by the string in the destination **/ ssize_t pull_utf8_allocate(void **dest, const char *src) { size_t src_len = strlen(src)+1; *dest = NULL; return convert_string_allocate(CH_UTF8, CH_UNIX, src, src_len, dest); } /** 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 maxiumum is used. **/ ssize_t push_string(const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags) { if (!(flags & STR_ASCII) && \ (((flags & STR_UNICODE) || \ (SVAL(base_ptr, NBT_HDR_SIZE+HDR_FLG2) & FLAGS2_UNICODE_STRINGS)))) { return push_ucs2(base_ptr, 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. 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. **/ ssize_t pull_string(const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags) { if (!(flags & STR_ASCII) && \ (((flags & STR_UNICODE) || \ (SVAL(base_ptr, NBT_HDR_SIZE+HDR_FLG2) & FLAGS2_UNICODE_STRINGS)))) { return pull_ucs2(base_ptr, dest, src, dest_len, src_len, flags); } return pull_ascii(dest, src, dest_len, src_len, flags); } ssize_t align_string(const void *base_ptr, const char *p, int flags) { if (!(flags & STR_ASCII) && \ ((flags & STR_UNICODE || \ (SVAL(base_ptr, NBT_HDR_SIZE+HDR_FLG2) & FLAGS2_UNICODE_STRINGS)))) { return ucs2_align(base_ptr, p, flags); } return 0; } /** Copy a string from a unicode or ascii source (depending on the packet flags) to a TALLOC'ed destination. 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. **/ ssize_t pull_string_talloc(TALLOC_CTX *ctx, char **dest, const void *src, size_t src_len, int flags) { if (!(flags & STR_ASCII) && \ (flags & STR_UNICODE)) { return pull_ucs2_talloc(ctx, dest, src); } *dest = NULL; if (flags & STR_TERMINATE) { *dest = talloc_strdup(ctx, src); return strlen(*dest); } *dest = talloc_strndup(ctx, src, src_len); return src_len; }