/* Unix SMB/CIFS implementation. Samba utility functions Copyright (C) Andrew Tridgell 1992-2001 Copyright (C) Simo Sorce 2001-2002 Copyright (C) Martin Pool 2003 Copyright (C) James Peach 2006 Copyright (C) Jeremy Allison 1992-2007 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 . */ #include "includes.h" const char toupper_ascii_fast_table[128] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f }; /** * Compare 2 strings up to and including the nth char. * * @note The comparison is case-insensitive. **/ bool strnequal(const char *s1,const char *s2,size_t n) { if (s1 == s2) return(true); if (!s1 || !s2 || !n) return(false); return(strncasecmp_m(s1,s2,n)==0); } /** Convert a string to "normal" form. **/ void strnorm(char *s, int case_default) { if (case_default == CASE_UPPER) strupper_m(s); else strlower_m(s); } /** * Skip past some strings in a buffer - old version - no checks. * **/ char *push_skip_string(char *buf) { buf += strlen(buf) + 1; return(buf); } /** Skip past a string in a buffer. Buffer may not be null terminated. end_ptr points to the first byte after then end of the buffer. **/ char *skip_string(const char *base, size_t len, char *buf) { const char *end_ptr = base + len; if (end_ptr < base || !base || !buf || buf >= end_ptr) { return NULL; } /* Skip the string */ while (*buf) { buf++; if (buf >= end_ptr) { return NULL; } } /* Skip the '\0' */ buf++; return buf; } /** Count the number of characters in a string. Normally this will be the same as the number of bytes in a string for single byte strings, but will be different for multibyte. **/ size_t str_charnum(const char *s) { size_t ret, converted_size; smb_ucs2_t *tmpbuf2 = NULL; if (!push_ucs2_talloc(talloc_tos(), &tmpbuf2, s, &converted_size)) { return 0; } ret = strlen_w(tmpbuf2); TALLOC_FREE(tmpbuf2); return ret; } bool trim_char(char *s,char cfront,char cback) { bool ret = false; char *ep; char *fp = s; /* Ignore null or empty strings. */ if (!s || (s[0] == '\0')) return false; if (cfront) { while (*fp && *fp == cfront) fp++; if (!*fp) { /* We ate the string. */ s[0] = '\0'; return true; } if (fp != s) ret = true; } ep = fp + strlen(fp) - 1; if (cback) { /* Attempt ascii only. Bail for mb strings. */ while ((ep >= fp) && (*ep == cback)) { ret = true; if ((ep > fp) && (((unsigned char)ep[-1]) & 0x80)) { /* Could be mb... bail back to tim_string. */ char fs[2], bs[2]; if (cfront) { fs[0] = cfront; fs[1] = '\0'; } bs[0] = cback; bs[1] = '\0'; return trim_string(s, cfront ? fs : NULL, bs); } else { ep--; } } if (ep < fp) { /* We ate the string. */ s[0] = '\0'; return true; } } ep[1] = '\0'; memmove(s, fp, ep-fp+2); return ret; } /** Like strncpy but always null terminates. Make sure there is room! The variable n should always be one less than the available size. **/ char *StrnCpy(char *dest,const char *src,size_t n) { char *d = dest; if (!dest) { smb_panic("ERROR: NULL dest in StrnCpy"); } if (!src) { *dest = 0; return(dest); } while (n-- && (*d = *src)) { d++; src++; } *d = 0; return(dest); } /** Check if a string is part of a list. **/ bool in_list(const char *s, const char *list, bool casesensitive) { char *tok = NULL; bool ret = false; TALLOC_CTX *frame; if (!list) { return false; } frame = talloc_stackframe(); while (next_token_talloc(frame, &list, &tok,LIST_SEP)) { if (casesensitive) { if (strcmp(tok,s) == 0) { ret = true; break; } } else { if (strcasecmp_m(tok,s) == 0) { ret = true; break; } } } TALLOC_FREE(frame); return ret; } /* * Internal guts of talloc_string_sub and talloc_all_string_sub. * talloc version of string_sub2. */ char *talloc_string_sub2(TALLOC_CTX *mem_ctx, const char *src, const char *pattern, const char *insert, bool remove_unsafe_characters, bool replace_once, bool allow_trailing_dollar) { char *p, *in; char *s; char *string; ssize_t ls,lp,li,ld, i; if (!insert || !pattern || !*pattern || !src) { return NULL; } string = talloc_strdup(mem_ctx, src); if (string == NULL) { DEBUG(0, ("talloc_string_sub2: " "talloc_strdup failed\n")); return NULL; } s = string; in = talloc_strdup(mem_ctx, insert); if (!in) { DEBUG(0, ("talloc_string_sub2: ENOMEM\n")); return NULL; } ls = (ssize_t)strlen(s); lp = (ssize_t)strlen(pattern); li = (ssize_t)strlen(insert); ld = li - lp; for (i=0;i 0) { int offset = PTR_DIFF(s,string); string = (char *)TALLOC_REALLOC(mem_ctx, string, ls + ld + 1); if (!string) { DEBUG(0, ("talloc_string_sub: out of " "memory!\n")); TALLOC_FREE(in); return NULL; } p = string + offset + (p - s); } if (li != lp) { memmove(p+li,p+lp,strlen(p+lp)+1); } memcpy(p, in, li); s = p + li; ls += ld; if (replace_once) { break; } } TALLOC_FREE(in); return string; } /* Same as string_sub, but returns a talloc'ed string */ char *talloc_string_sub(TALLOC_CTX *mem_ctx, const char *src, const char *pattern, const char *insert) { return talloc_string_sub2(mem_ctx, src, pattern, insert, true, false, false); } char *talloc_all_string_sub(TALLOC_CTX *ctx, const char *src, const char *pattern, const char *insert) { return talloc_string_sub2(ctx, src, pattern, insert, false, false, false); } /** Write an octal as a string. **/ char *octal_string(int i) { char *result; if (i == -1) { result = talloc_strdup(talloc_tos(), "-1"); } else { result = talloc_asprintf(talloc_tos(), "0%o", i); } SMB_ASSERT(result != NULL); return result; } /** Truncate a string at a specified length. **/ char *string_truncate(char *s, unsigned int length) { if (s && strlen(s) > length) s[length] = 0; return s; } /*********************************************************************** Return the equivalent of doing strrchr 'n' times - always going backwards. ***********************************************************************/ char *strnrchr_m(const char *s, char c, unsigned int n) { smb_ucs2_t *ws = NULL; char *s2 = NULL; smb_ucs2_t *p; char *ret; size_t converted_size; if (!push_ucs2_talloc(talloc_tos(), &ws, s, &converted_size)) { /* Too hard to try and get right. */ return NULL; } p = strnrchr_w(ws, UCS2_CHAR(c), n); if (!p) { TALLOC_FREE(ws); return NULL; } *p = 0; if (!pull_ucs2_talloc(talloc_tos(), &s2, ws, &converted_size)) { TALLOC_FREE(ws); /* Too hard to try and get right. */ return NULL; } ret = discard_const_p(char, (s+strlen(s2))); TALLOC_FREE(ws); TALLOC_FREE(s2); return ret; } static bool unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen) { size_t size; smb_ucs2_t *buffer = NULL; bool ret; if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF16LE, src, srclen, (void **)(void *)&buffer, &size)) { smb_panic("failed to create UCS2 buffer"); } if (!strlower_w(buffer) && (dest == src)) { TALLOC_FREE(buffer); return srclen; } ret = convert_string(CH_UTF16LE, CH_UNIX, buffer, size, dest, destlen, &size); TALLOC_FREE(buffer); return ret; } #if 0 /* Alternate function that avoid talloc calls for ASCII and non ASCII */ /** Convert a string to lower case. **/ _PUBLIC_ void strlower_m(char *s) { char *d; struct smb_iconv_handle *iconv_handle; iconv_handle = get_iconv_handle(); d = s; while (*s) { size_t c_size, c_size2; codepoint_t c = next_codepoint_handle(iconv_handle, s, &c_size); c_size2 = push_codepoint_handle(iconv_handle, d, tolower_m(c)); if (c_size2 > c_size) { DEBUG(0,("FATAL: codepoint 0x%x (0x%x) expanded from %d to %d bytes in strlower_m\n", c, tolower_m(c), (int)c_size, (int)c_size2)); smb_panic("codepoint expansion in strlower_m\n"); } s += c_size; d += c_size2; } *d = 0; } #endif /** Convert a string to lower case. **/ void strlower_m(char *s) { size_t len; int errno_save; /* this is quite a common operation, so we want it to be fast. We optimise for the ascii case, knowing that all our supported multi-byte character sets are ascii-compatible (ie. they match for the first 128 chars) */ while (*s && !(((unsigned char)s[0]) & 0x80)) { *s = tolower_m((unsigned char)*s); s++; } if (!*s) return; /* I assume that lowercased string takes the same number of bytes * as source string even in UTF-8 encoding. (VIV) */ len = strlen(s) + 1; errno_save = errno; errno = 0; unix_strlower(s,len,s,len); /* Catch mb conversion errors that may not terminate. */ if (errno) s[len-1] = '\0'; errno = errno_save; } static bool unix_strupper(const char *src, size_t srclen, char *dest, size_t destlen) { size_t size; smb_ucs2_t *buffer; bool ret; if (!push_ucs2_talloc(talloc_tos(), &buffer, src, &size)) { return (size_t)-1; } if (!strupper_w(buffer) && (dest == src)) { TALLOC_FREE(buffer); return srclen; } ret = convert_string(CH_UTF16LE, CH_UNIX, buffer, size, dest, destlen, &size); TALLOC_FREE(buffer); return ret; } #if 0 /* Alternate function that avoid talloc calls for ASCII and non ASCII */ /** Convert a string to UPPER case. **/ _PUBLIC_ void strupper_m(char *s) { char *d; struct smb_iconv_handle *iconv_handle; iconv_handle = get_iconv_handle(); d = s; while (*s) { size_t c_size, c_size2; codepoint_t c = next_codepoint_handle(iconv_handle, s, &c_size); c_size2 = push_codepoint_handle(iconv_handle, d, toupper_m(c)); if (c_size2 > c_size) { DEBUG(0,("FATAL: codepoint 0x%x (0x%x) expanded from %d to %d bytes in strupper_m\n", c, toupper_m(c), (int)c_size, (int)c_size2)); smb_panic("codepoint expansion in strupper_m\n"); } s += c_size; d += c_size2; } *d = 0; } #endif /** Convert a string to upper case. **/ void strupper_m(char *s) { size_t len; int errno_save; /* this is quite a common operation, so we want it to be fast. We optimise for the ascii case, knowing that all our supported multi-byte character sets are ascii-compatible (ie. they match for the first 128 chars) */ while (*s && !(((unsigned char)s[0]) & 0x80)) { *s = toupper_ascii_fast((unsigned char)*s); s++; } if (!*s) return; /* I assume that lowercased string takes the same number of bytes * as source string even in multibyte encoding. (VIV) */ len = strlen(s) + 1; errno_save = errno; errno = 0; unix_strupper(s,len,s,len); /* Catch mb conversion errors that may not terminate. */ if (errno) s[len-1] = '\0'; errno = errno_save; } /** Just a typesafety wrapper for snprintf into a fstring. **/ int fstr_sprintf(fstring s, const char *fmt, ...) { va_list ap; int ret; va_start(ap, fmt); ret = vsnprintf(s, FSTRING_LEN, fmt, ap); va_end(ap); return ret; } /** List of Strings manipulation functions **/ #define S_LIST_ABS 16 /* List Allocation Block Size */ /****************************************************************************** substitute a specific pattern in a string list *****************************************************************************/ bool str_list_substitute(char **list, const char *pattern, const char *insert) { TALLOC_CTX *ctx = list; char *p, *s, *t; ssize_t ls, lp, li, ld, i, d; if (!list) return false; if (!pattern) return false; if (!insert) return false; lp = (ssize_t)strlen(pattern); li = (ssize_t)strlen(insert); ld = li -lp; while (*list) { s = *list; ls = (ssize_t)strlen(s); while ((p = strstr_m(s, pattern))) { t = *list; d = p -t; if (ld) { t = talloc_array(ctx, char, ls +ld +1); if (!t) { DEBUG(0,("str_list_substitute: " "Unable to allocate memory")); return false; } memcpy(t, *list, d); memcpy(t +d +li, p +lp, ls -d -lp +1); TALLOC_FREE(*list); *list = t; ls += ld; s = t +d +li; } for (i = 0; i < li; i++) { switch (insert[i]) { case '`': case '"': case '\'': case ';': case '$': case '%': case '\r': case '\n': t[d +i] = '_'; break; default: t[d +i] = insert[i]; } } } list++; } return true; } #define IPSTR_LIST_SEP "," #define IPSTR_LIST_CHAR ',' /** * Add ip string representation to ipstr list. Used also * as part of @function ipstr_list_make * * @param ipstr_list pointer to string containing ip list; * MUST BE already allocated and IS reallocated if necessary * @param ipstr_size pointer to current size of ipstr_list (might be changed * as a result of reallocation) * @param ip IP address which is to be added to list * @return pointer to string appended with new ip and possibly * reallocated to new length **/ static char *ipstr_list_add(char **ipstr_list, const struct ip_service *service) { char *new_ipstr = NULL; char addr_buf[INET6_ADDRSTRLEN]; int ret; /* arguments checking */ if (!ipstr_list || !service) { return NULL; } print_sockaddr(addr_buf, sizeof(addr_buf), &service->ss); /* attempt to convert ip to a string and append colon separator to it */ if (*ipstr_list) { if (service->ss.ss_family == AF_INET) { /* IPv4 */ ret = asprintf(&new_ipstr, "%s%s%s:%d", *ipstr_list, IPSTR_LIST_SEP, addr_buf, service->port); } else { /* IPv6 */ ret = asprintf(&new_ipstr, "%s%s[%s]:%d", *ipstr_list, IPSTR_LIST_SEP, addr_buf, service->port); } SAFE_FREE(*ipstr_list); } else { if (service->ss.ss_family == AF_INET) { /* IPv4 */ ret = asprintf(&new_ipstr, "%s:%d", addr_buf, service->port); } else { /* IPv6 */ ret = asprintf(&new_ipstr, "[%s]:%d", addr_buf, service->port); } } if (ret == -1) { return NULL; } *ipstr_list = new_ipstr; return *ipstr_list; } /** * Allocate and initialise an ipstr list using ip adresses * passed as arguments. * * @param ipstr_list pointer to string meant to be allocated and set * @param ip_list array of ip addresses to place in the list * @param ip_count number of addresses stored in ip_list * @return pointer to allocated ip string **/ char *ipstr_list_make(char **ipstr_list, const struct ip_service *ip_list, int ip_count) { int i; /* arguments checking */ if (!ip_list || !ipstr_list) { return 0; } *ipstr_list = NULL; /* process ip addresses given as arguments */ for (i = 0; i < ip_count; i++) { *ipstr_list = ipstr_list_add(ipstr_list, &ip_list[i]); } return (*ipstr_list); } /** * Parse given ip string list into array of ip addresses * (as ip_service structures) * e.g. [IPv6]:port,192.168.1.100:389,192.168.1.78, ... * * @param ipstr ip string list to be parsed * @param ip_list pointer to array of ip addresses which is * allocated by this function and must be freed by caller * @return number of successfully parsed addresses **/ int ipstr_list_parse(const char *ipstr_list, struct ip_service **ip_list) { TALLOC_CTX *frame; char *token_str = NULL; size_t count; int i; if (!ipstr_list || !ip_list) return 0; count = count_chars(ipstr_list, IPSTR_LIST_CHAR) + 1; if ( (*ip_list = SMB_MALLOC_ARRAY(struct ip_service, count)) == NULL ) { DEBUG(0,("ipstr_list_parse: malloc failed for %lu entries\n", (unsigned long)count)); return 0; } frame = talloc_stackframe(); for ( i=0; next_token_talloc(frame, &ipstr_list, &token_str, IPSTR_LIST_SEP) && i= *bufsize) { increased = true; *bufsize *= 2; if (*bufsize >= (1024*1024*256)) goto error; } if (increased) { *string = talloc_realloc(mem_ctx, *string, char, *bufsize); if (*string == NULL) { goto error; } } StrnCpy((*string)+(*len), newstr, ret); (*len) += ret; free(newstr); return; error: *len = -1; *string = NULL; } /* * asprintf into a string and strupper_m it after that. */ int asprintf_strupper_m(char **strp, const char *fmt, ...) { va_list ap; char *result; int ret; va_start(ap, fmt); ret = vasprintf(&result, fmt, ap); va_end(ap); if (ret == -1) return -1; strupper_m(result); *strp = result; return ret; } char *talloc_asprintf_strupper_m(TALLOC_CTX *t, const char *fmt, ...) { va_list ap; char *ret; va_start(ap, fmt); ret = talloc_vasprintf(t, fmt, ap); va_end(ap); if (ret == NULL) { return NULL; } strupper_m(ret); return ret; } char *talloc_asprintf_strlower_m(TALLOC_CTX *t, const char *fmt, ...) { va_list ap; char *ret; va_start(ap, fmt); ret = talloc_vasprintf(t, fmt, ap); va_end(ap); if (ret == NULL) { return NULL; } strlower_m(ret); return ret; } /******************************************************************** Check a string for any occurrences of a specified list of invalid characters. ********************************************************************/ bool validate_net_name( const char *name, const char *invalid_chars, int max_len) { int i; if (!name) { return false; } for ( i=0; i 1) { memcpy(dest, src, c_size); src += c_size; dest += c_size; next_escaped = false; continue; } /* * Deal with backslash escaped state. * This only lasts for one character. */ if (next_escaped) { *dest++ = *src++; next_escaped = false; continue; } /* * Deal with single quote state. The * only thing we care about is exiting * this state. */ if (in_s_quote) { if (*src == '\'') { in_s_quote = false; } *dest++ = *src++; continue; } /* * Deal with double quote state. The most * complex state. We must cope with \, meaning * possibly escape next char (depending what it * is), ", meaning exit this state, and possibly * add an \ escape to any unprotected character * (listed in INSIDE_DQUOTE_LIST). */ if (in_d_quote) { if (*src == '\\') { /* * Next character might be escaped. * We have to peek. Inside double * quotes only INSIDE_DQUOTE_LIST * characters are escaped by a \. */ char nextchar; c = next_codepoint(&src[1], &c_size); if (c == INVALID_CODEPOINT) { SAFE_FREE(ret); return NULL; } if (c_size > 1) { /* * Don't escape the next char. * Just copy the \. */ *dest++ = *src++; continue; } nextchar = src[1]; if (nextchar && strchr(INSIDE_DQUOTE_LIST, (int)nextchar)) { next_escaped = true; } *dest++ = *src++; continue; } if (*src == '\"') { /* Exit double quote state. */ in_d_quote = false; *dest++ = *src++; continue; } /* * We know the character isn't \ or ", * so escape it if it's any of the other * possible unprotected characters. */ if (strchr(INSIDE_DQUOTE_LIST, (int)*src)) { *dest++ = '\\'; } *dest++ = *src++; continue; } /* * From here to the end of the loop we're * not in the single or double quote state. */ if (*src == '\\') { /* Next character must be escaped. */ next_escaped = true; *dest++ = *src++; continue; } if (*src == '\'') { /* Go into single quote state. */ in_s_quote = true; *dest++ = *src++; continue; } if (*src == '\"') { /* Go into double quote state. */ in_d_quote = true; *dest++ = *src++; continue; } /* Check if we need to escape the character. */ if (!strchr(INCLUDE_LIST, (int)*src)) { *dest++ = '\\'; } *dest++ = *src++; } *dest++ = '\0'; return ret; } /*************************************************** str_list_make, v3 version. The v4 version does not look at quoted strings with embedded blanks, so do NOT merge this function please! ***************************************************/ #define S_LIST_ABS 16 /* List Allocation Block Size */ char **str_list_make_v3(TALLOC_CTX *mem_ctx, const char *string, const char *sep) { char **list; const char *str; char *s, *tok; int num, lsize; if (!string || !*string) return NULL; list = talloc_array(mem_ctx, char *, S_LIST_ABS+1); if (list == NULL) { return NULL; } lsize = S_LIST_ABS; s = talloc_strdup(list, string); if (s == NULL) { DEBUG(0,("str_list_make: Unable to allocate memory")); TALLOC_FREE(list); return NULL; } if (!sep) sep = LIST_SEP; num = 0; str = s; while (next_token_talloc(list, &str, &tok, sep)) { if (num == lsize) { char **tmp; lsize += S_LIST_ABS; tmp = talloc_realloc(mem_ctx, list, char *, lsize + 1); if (tmp == NULL) { DEBUG(0,("str_list_make: " "Unable to allocate memory")); TALLOC_FREE(list); return NULL; } list = tmp; memset (&list[num], 0, ((sizeof(char**)) * (S_LIST_ABS +1))); } list[num] = tok; num += 1; } list[num] = NULL; TALLOC_FREE(s); return list; } char *sanitize_username(TALLOC_CTX *mem_ctx, const char *username) { fstring tmp; alpha_strcpy(tmp, username, ". _-$", sizeof(tmp)); return talloc_strdup(mem_ctx, tmp); }