LCOV - code coverage report
Current view: top level - lib - stringprep.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 131 155 84.5 %
Date: 2013-07-10 Functions: 6 8 75.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 99 145 68.3 %

           Branch data     Line data    Source code
       1                 :            : /* stringprep.c --- Core stringprep implementation.
       2                 :            :    Copyright (C) 2002-2013 Simon Josefsson
       3                 :            : 
       4                 :            :    This file is part of GNU Libidn.
       5                 :            : 
       6                 :            :    GNU Libidn is free software: you can redistribute it and/or
       7                 :            :    modify it under the terms of either:
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version.
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version.
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    GNU Libidn is distributed in the hope that it will be useful,
      22                 :            :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>. */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include "config.h"
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include <stdlib.h>
      35                 :            : #include <string.h>
      36                 :            : 
      37                 :            : #include "stringprep.h"
      38                 :            : 
      39                 :            : static ssize_t
      40                 :      22590 : stringprep_find_character_in_table (uint32_t ucs4,
      41                 :            :                                     const Stringprep_table_element * table)
      42                 :            : {
      43                 :            :   ssize_t i;
      44                 :            : 
      45                 :            :   /* This is where typical uses of Libidn spends very close to all CPU
      46                 :            :      time and causes most cache misses.  One could easily do a binary
      47                 :            :      search instead.  Before rewriting this, I want hard evidence this
      48                 :            :      slowness is at all relevant in typical applications.  (I don't
      49                 :            :      dispute optimization may improve matters significantly, I'm
      50                 :            :      mostly interested in having someone give real-world benchmark on
      51                 :            :      the impact of libidn.) */
      52                 :            : 
      53 [ +  + ][ +  + ]:    3859821 :   for (i = 0; table[i].start || table[i].end; i++)
      54 [ +  + ][ +  + ]:    4559106 :     if (ucs4 >= table[i].start &&
      55         [ +  + ]:     721516 :         ucs4 <= (table[i].end ? table[i].end : table[i].start))
      56                 :        359 :       return i;
      57                 :            : 
      58                 :      22590 :   return -1;
      59                 :            : }
      60                 :            : 
      61                 :            : static ssize_t
      62                 :       3090 : stringprep_find_string_in_table (uint32_t * ucs4,
      63                 :            :                                  size_t ucs4len,
      64                 :            :                                  size_t * tablepos,
      65                 :            :                                  const Stringprep_table_element * table)
      66                 :            : {
      67                 :            :   size_t j;
      68                 :            :   ssize_t pos;
      69                 :            : 
      70         [ +  + ]:      25319 :   for (j = 0; j < ucs4len; j++)
      71         [ +  + ]:      22570 :     if ((pos = stringprep_find_character_in_table (ucs4[j], table)) != -1)
      72                 :            :       {
      73         [ +  + ]:        341 :         if (tablepos)
      74                 :        119 :           *tablepos = pos;
      75                 :        341 :         return j;
      76                 :            :       }
      77                 :            : 
      78                 :       3090 :   return -1;
      79                 :            : }
      80                 :            : 
      81                 :            : static int
      82                 :        449 : stringprep_apply_table_to_string (uint32_t * ucs4,
      83                 :            :                                   size_t * ucs4len,
      84                 :            :                                   size_t maxucs4len,
      85                 :            :                                   const Stringprep_table_element * table)
      86                 :            : {
      87                 :            :   ssize_t pos;
      88                 :            :   size_t i, maplen;
      89                 :            : 
      90         [ +  + ]:        568 :   while ((pos = stringprep_find_string_in_table (ucs4, *ucs4len,
      91                 :            :                                                  &i, table)) != -1)
      92                 :            :     {
      93         [ +  + ]:        446 :       for (maplen = STRINGPREP_MAX_MAP_CHARS;
      94         [ +  + ]:        429 :            maplen > 0 && table[i].map[maplen - 1] == 0; maplen--)
      95                 :            :         ;
      96                 :            : 
      97         [ -  + ]:        119 :       if (*ucs4len - 1 + maplen >= maxucs4len)
      98                 :          0 :         return STRINGPREP_TOO_SMALL_BUFFER;
      99                 :            : 
     100                 :        119 :       memmove (&ucs4[pos + maplen], &ucs4[pos + 1],
     101                 :        119 :                sizeof (uint32_t) * (*ucs4len - pos - 1));
     102                 :        119 :       memcpy (&ucs4[pos], table[i].map, sizeof (uint32_t) * maplen);
     103                 :        119 :       *ucs4len = *ucs4len - 1 + maplen;
     104                 :            :     }
     105                 :            : 
     106                 :        449 :   return STRINGPREP_OK;
     107                 :            : }
     108                 :            : 
     109                 :            : #define INVERTED(x) ((x) & ((~0UL) >> 1))
     110                 :            : #define UNAPPLICAPLEFLAGS(flags, profileflags) \
     111                 :            :   ((!INVERTED(profileflags) && !(profileflags & flags) && profileflags) || \
     112                 :            :    ( INVERTED(profileflags) && (profileflags & flags)))
     113                 :            : 
     114                 :            : /**
     115                 :            :  * stringprep_4i:
     116                 :            :  * @ucs4: input/output array with string to prepare.
     117                 :            :  * @len: on input, length of input array with Unicode code points,
     118                 :            :  *   on exit, length of output array with Unicode code points.
     119                 :            :  * @maxucs4len: maximum length of input/output array.
     120                 :            :  * @flags: a #Stringprep_profile_flags value, or 0.
     121                 :            :  * @profile: pointer to #Stringprep_profile to use.
     122                 :            :  *
     123                 :            :  * Prepare the input UCS-4 string according to the stringprep profile,
     124                 :            :  * and write back the result to the input string.
     125                 :            :  *
     126                 :            :  * The input is not required to be zero terminated (@ucs4[@len] = 0).
     127                 :            :  * The output will not be zero terminated unless @ucs4[@len] = 0.
     128                 :            :  * Instead, see stringprep_4zi() if your input is zero terminated or
     129                 :            :  * if you want the output to be.
     130                 :            :  *
     131                 :            :  * Since the stringprep operation can expand the string, @maxucs4len
     132                 :            :  * indicate how large the buffer holding the string is.  This function
     133                 :            :  * will not read or write to code points outside that size.
     134                 :            :  *
     135                 :            :  * The @flags are one of #Stringprep_profile_flags values, or 0.
     136                 :            :  *
     137                 :            :  * The @profile contain the #Stringprep_profile instructions to
     138                 :            :  * perform.  Your application can define new profiles, possibly
     139                 :            :  * re-using the generic stringprep tables that always will be part of
     140                 :            :  * the library, or use one of the currently supported profiles.
     141                 :            :  *
     142                 :            :  * Return value: Returns %STRINGPREP_OK iff successful, or an
     143                 :            :  *   #Stringprep_rc error code.
     144                 :            :  **/
     145                 :            : int
     146                 :        226 : stringprep_4i (uint32_t * ucs4, size_t * len, size_t maxucs4len,
     147                 :            :                Stringprep_profile_flags flags,
     148                 :            :                const Stringprep_profile * profile)
     149                 :            : {
     150                 :            :   size_t i, j;
     151                 :            :   ssize_t k;
     152                 :        226 :   size_t ucs4len = *len;
     153                 :            :   int rc;
     154                 :            : 
     155         [ +  + ]:       3655 :   for (i = 0; profile[i].operation; i++)
     156                 :            :     {
     157   [ +  +  +  +  :       3479 :       switch (profile[i].operation)
                +  +  - ]
     158                 :            :         {
     159                 :            :         case STRINGPREP_NFKC:
     160                 :            :           {
     161                 :        225 :             uint32_t *q = 0;
     162                 :            : 
     163 [ +  - ][ +  - ]:        225 :             if (UNAPPLICAPLEFLAGS (flags, profile[i].flags))
         [ +  - ][ -  + ]
                 [ #  # ]
     164                 :            :               break;
     165                 :            : 
     166 [ +  + ][ +  - ]:        225 :             if (flags & STRINGPREP_NO_NFKC && !profile[i].flags)
     167                 :            :               /* Profile requires NFKC, but callee asked for no NFKC. */
     168                 :          1 :               return STRINGPREP_FLAG_ERROR;
     169                 :            : 
     170                 :        224 :             q = stringprep_ucs4_nfkc_normalize (ucs4, ucs4len);
     171         [ -  + ]:        224 :             if (!q)
     172                 :          0 :               return STRINGPREP_NFKC_FAILED;
     173                 :            : 
     174         [ +  + ]:       1827 :             for (ucs4len = 0; q[ucs4len]; ucs4len++)
     175                 :            :               ;
     176                 :            : 
     177         [ -  + ]:        224 :             if (ucs4len >= maxucs4len)
     178                 :            :               {
     179                 :          0 :                 free (q);
     180                 :          0 :                 return STRINGPREP_TOO_SMALL_BUFFER;
     181                 :            :               }
     182                 :            : 
     183                 :        224 :             memcpy (ucs4, q, ucs4len * sizeof (ucs4[0]));
     184                 :            : 
     185                 :        224 :             free (q);
     186                 :            :           }
     187                 :        224 :           break;
     188                 :            : 
     189                 :            :         case STRINGPREP_PROHIBIT_TABLE:
     190                 :       1900 :           k = stringprep_find_string_in_table (ucs4, ucs4len,
     191                 :       1900 :                                                NULL, profile[i].table);
     192         [ +  + ]:       1900 :           if (k != -1)
     193                 :         35 :             return STRINGPREP_CONTAINS_PROHIBITED;
     194                 :       1865 :           break;
     195                 :            : 
     196                 :            :         case STRINGPREP_UNASSIGNED_TABLE:
     197 [ -  + ][ #  # ]:        178 :           if (UNAPPLICAPLEFLAGS (flags, profile[i].flags))
         [ #  # ][ +  - ]
                 [ +  - ]
     198                 :            :             break;
     199         [ +  + ]:        178 :           if (flags & STRINGPREP_NO_UNASSIGNED)
     200                 :            :             {
     201                 :         52 :               k = stringprep_find_string_in_table
     202                 :         52 :                 (ucs4, ucs4len, NULL, profile[i].table);
     203         [ +  + ]:         52 :               if (k != -1)
     204                 :          3 :                 return STRINGPREP_CONTAINS_UNASSIGNED;
     205                 :            :             }
     206                 :        175 :           break;
     207                 :            : 
     208                 :            :         case STRINGPREP_MAP_TABLE:
     209 [ +  - ][ +  - ]:        449 :           if (UNAPPLICAPLEFLAGS (flags, profile[i].flags))
         [ +  - ][ -  + ]
                 [ #  # ]
     210                 :            :             break;
     211                 :        449 :           rc = stringprep_apply_table_to_string
     212                 :        449 :             (ucs4, &ucs4len, maxucs4len, profile[i].table);
     213         [ -  + ]:        449 :           if (rc != STRINGPREP_OK)
     214                 :          0 :             return rc;
     215                 :        449 :           break;
     216                 :            : 
     217                 :            :         case STRINGPREP_BIDI_PROHIBIT_TABLE:
     218                 :            :         case STRINGPREP_BIDI_RAL_TABLE:
     219                 :            :         case STRINGPREP_BIDI_L_TABLE:
     220                 :        537 :           break;
     221                 :            : 
     222                 :            :         case STRINGPREP_BIDI:
     223                 :            :           {
     224                 :        190 :             int done_prohibited = 0;
     225                 :        190 :             int done_ral = 0;
     226                 :        190 :             int done_l = 0;
     227                 :        190 :             size_t contains_ral = SIZE_MAX;
     228                 :        190 :             size_t contains_l = SIZE_MAX;
     229                 :            : 
     230         [ +  + ]:       3427 :             for (j = 0; profile[j].operation; j++)
     231         [ +  + ]:       3237 :               if (profile[j].operation == STRINGPREP_BIDI_PROHIBIT_TABLE)
     232                 :            :                 {
     233                 :        190 :                   done_prohibited = 1;
     234                 :        190 :                   k = stringprep_find_string_in_table (ucs4, ucs4len,
     235                 :            :                                                        NULL,
     236                 :        190 :                                                        profile[j].table);
     237         [ -  + ]:        190 :                   if (k != -1)
     238                 :          0 :                     return STRINGPREP_BIDI_CONTAINS_PROHIBITED;
     239                 :            :                 }
     240         [ +  + ]:       3047 :               else if (profile[j].operation == STRINGPREP_BIDI_RAL_TABLE)
     241                 :            :                 {
     242                 :        190 :                   done_ral = 1;
     243         [ +  + ]:        190 :                   if (stringprep_find_string_in_table
     244                 :        190 :                       (ucs4, ucs4len, NULL, profile[j].table) != -1)
     245                 :         19 :                     contains_ral = j;
     246                 :            :                 }
     247         [ +  + ]:       2857 :               else if (profile[j].operation == STRINGPREP_BIDI_L_TABLE)
     248                 :            :                 {
     249                 :        190 :                   done_l = 1;
     250         [ +  + ]:        190 :                   if (stringprep_find_string_in_table
     251                 :        190 :                       (ucs4, ucs4len, NULL, profile[j].table) != -1)
     252                 :        165 :                     contains_l = j;
     253                 :            :                 }
     254                 :            : 
     255 [ +  - ][ +  - ]:        190 :             if (!done_prohibited || !done_ral || !done_l)
                 [ -  + ]
     256                 :          0 :               return STRINGPREP_PROFILE_ERROR;
     257                 :            : 
     258 [ +  + ][ +  + ]:        190 :             if (contains_ral != SIZE_MAX && contains_l != SIZE_MAX)
     259                 :          9 :               return STRINGPREP_BIDI_BOTH_L_AND_RAL;
     260                 :            : 
     261         [ +  + ]:        181 :             if (contains_ral != SIZE_MAX)
     262                 :            :               {
     263   [ +  -  +  + ]:         20 :                 if (!(stringprep_find_character_in_table
     264                 :         10 :                       (ucs4[0], profile[contains_ral].table) != -1 &&
     265                 :            :                       stringprep_find_character_in_table
     266                 :         10 :                       (ucs4[ucs4len - 1], profile[contains_ral].table) != -1))
     267                 :          2 :                   return STRINGPREP_BIDI_LEADTRAIL_NOT_RAL;
     268                 :            :               }
     269                 :            :           }
     270                 :        179 :           break;
     271                 :            : 
     272                 :            :         default:
     273                 :          0 :           return STRINGPREP_PROFILE_ERROR;
     274                 :            :           break;
     275                 :            :         }
     276                 :            :     }
     277                 :            : 
     278                 :        176 :   *len = ucs4len;
     279                 :            : 
     280                 :        226 :   return STRINGPREP_OK;
     281                 :            : }
     282                 :            : 
     283                 :            : static int
     284                 :          0 : stringprep_4zi_1 (uint32_t * ucs4, size_t ucs4len, size_t maxucs4len,
     285                 :            :                   Stringprep_profile_flags flags,
     286                 :            :                   const Stringprep_profile * profile)
     287                 :            : {
     288                 :            :   int rc;
     289                 :            : 
     290                 :          0 :   rc = stringprep_4i (ucs4, &ucs4len, maxucs4len, flags, profile);
     291         [ #  # ]:          0 :   if (rc != STRINGPREP_OK)
     292                 :          0 :     return rc;
     293                 :            : 
     294         [ #  # ]:          0 :   if (ucs4len >= maxucs4len)
     295                 :          0 :     return STRINGPREP_TOO_SMALL_BUFFER;
     296                 :            : 
     297                 :          0 :   ucs4[ucs4len] = 0;
     298                 :            : 
     299                 :          0 :   return STRINGPREP_OK;
     300                 :            : }
     301                 :            : 
     302                 :            : /**
     303                 :            :  * stringprep_4zi:
     304                 :            :  * @ucs4: input/output array with zero terminated string to prepare.
     305                 :            :  * @maxucs4len: maximum length of input/output array.
     306                 :            :  * @flags: a #Stringprep_profile_flags value, or 0.
     307                 :            :  * @profile: pointer to #Stringprep_profile to use.
     308                 :            :  *
     309                 :            :  * Prepare the input zero terminated UCS-4 string according to the
     310                 :            :  * stringprep profile, and write back the result to the input string.
     311                 :            :  *
     312                 :            :  * Since the stringprep operation can expand the string, @maxucs4len
     313                 :            :  * indicate how large the buffer holding the string is.  This function
     314                 :            :  * will not read or write to code points outside that size.
     315                 :            :  *
     316                 :            :  * The @flags are one of #Stringprep_profile_flags values, or 0.
     317                 :            :  *
     318                 :            :  * The @profile contain the #Stringprep_profile instructions to
     319                 :            :  * perform.  Your application can define new profiles, possibly
     320                 :            :  * re-using the generic stringprep tables that always will be part of
     321                 :            :  * the library, or use one of the currently supported profiles.
     322                 :            :  *
     323                 :            :  * Return value: Returns %STRINGPREP_OK iff successful, or an
     324                 :            :  *   #Stringprep_rc error code.
     325                 :            :  **/
     326                 :            : int
     327                 :          0 : stringprep_4zi (uint32_t * ucs4, size_t maxucs4len,
     328                 :            :                 Stringprep_profile_flags flags,
     329                 :            :                 const Stringprep_profile * profile)
     330                 :            : {
     331                 :            :   size_t ucs4len;
     332                 :            : 
     333 [ #  # ][ #  # ]:          0 :   for (ucs4len = 0; ucs4len < maxucs4len && ucs4[ucs4len] != 0; ucs4len++)
     334                 :            :     ;
     335                 :            : 
     336                 :          0 :   return stringprep_4zi_1 (ucs4, ucs4len, maxucs4len, flags, profile);
     337                 :            : }
     338                 :            : 
     339                 :            : /**
     340                 :            :  * stringprep:
     341                 :            :  * @in: input/ouput array with string to prepare.
     342                 :            :  * @maxlen: maximum length of input/output array.
     343                 :            :  * @flags: a #Stringprep_profile_flags value, or 0.
     344                 :            :  * @profile: pointer to #Stringprep_profile to use.
     345                 :            :  *
     346                 :            :  * Prepare the input zero terminated UTF-8 string according to the
     347                 :            :  * stringprep profile, and write back the result to the input string.
     348                 :            :  *
     349                 :            :  * Note that you must convert strings entered in the systems locale
     350                 :            :  * into UTF-8 before using this function, see
     351                 :            :  * stringprep_locale_to_utf8().
     352                 :            :  *
     353                 :            :  * Since the stringprep operation can expand the string, @maxlen
     354                 :            :  * indicate how large the buffer holding the string is.  This function
     355                 :            :  * will not read or write to characters outside that size.
     356                 :            :  *
     357                 :            :  * The @flags are one of #Stringprep_profile_flags values, or 0.
     358                 :            :  *
     359                 :            :  * The @profile contain the #Stringprep_profile instructions to
     360                 :            :  * perform.  Your application can define new profiles, possibly
     361                 :            :  * re-using the generic stringprep tables that always will be part of
     362                 :            :  * the library, or use one of the currently supported profiles.
     363                 :            :  *
     364                 :            :  * Return value: Returns %STRINGPREP_OK iff successful, or an error code.
     365                 :            :  **/
     366                 :            : int
     367                 :        226 : stringprep (char *in,
     368                 :            :             size_t maxlen,
     369                 :            :             Stringprep_profile_flags flags,
     370                 :            :             const Stringprep_profile * profile)
     371                 :            : {
     372                 :            :   int rc;
     373                 :        226 :   char *utf8 = NULL;
     374                 :        226 :   uint32_t *ucs4 = NULL;
     375                 :        226 :   size_t ucs4len, maxucs4len, adducs4len = 50;
     376                 :            : 
     377                 :            :   do
     378                 :            :     {
     379                 :            :       uint32_t *newp;
     380                 :            : 
     381                 :        226 :       free (ucs4);
     382                 :        226 :       ucs4 = stringprep_utf8_to_ucs4 (in, -1, &ucs4len);
     383                 :        226 :       maxucs4len = ucs4len + adducs4len;
     384                 :        226 :       newp = realloc (ucs4, maxucs4len * sizeof (uint32_t));
     385         [ -  + ]:        226 :       if (!newp)
     386                 :            :         {
     387                 :          0 :           free (ucs4);
     388                 :          0 :           return STRINGPREP_MALLOC_ERROR;
     389                 :            :         }
     390                 :        226 :       ucs4 = newp;
     391                 :            : 
     392                 :        226 :       rc = stringprep_4i (ucs4, &ucs4len, maxucs4len, flags, profile);
     393                 :        226 :       adducs4len += 50;
     394                 :            :     }
     395         [ -  + ]:        226 :   while (rc == STRINGPREP_TOO_SMALL_BUFFER);
     396         [ +  + ]:        226 :   if (rc != STRINGPREP_OK)
     397                 :            :     {
     398                 :         50 :       free (ucs4);
     399                 :         50 :       return rc;
     400                 :            :     }
     401                 :            : 
     402                 :        176 :   utf8 = stringprep_ucs4_to_utf8 (ucs4, ucs4len, 0, 0);
     403                 :        176 :   free (ucs4);
     404         [ -  + ]:        176 :   if (!utf8)
     405                 :          0 :     return STRINGPREP_MALLOC_ERROR;
     406                 :            : 
     407         [ +  + ]:        176 :   if (strlen (utf8) >= maxlen)
     408                 :            :     {
     409                 :          5 :       free (utf8);
     410                 :          5 :       return STRINGPREP_TOO_SMALL_BUFFER;
     411                 :            :     }
     412                 :            : 
     413                 :        171 :   strcpy (in, utf8);            /* flawfinder: ignore */
     414                 :            : 
     415                 :        171 :   free (utf8);
     416                 :            : 
     417                 :        226 :   return STRINGPREP_OK;
     418                 :            : }
     419                 :            : 
     420                 :            : /**
     421                 :            :  * stringprep_profile:
     422                 :            :  * @in: input array with UTF-8 string to prepare.
     423                 :            :  * @out: output variable with pointer to newly allocate string.
     424                 :            :  * @profile: name of stringprep profile to use.
     425                 :            :  * @flags: a #Stringprep_profile_flags value, or 0.
     426                 :            :  *
     427                 :            :  * Prepare the input zero terminated UTF-8 string according to the
     428                 :            :  * stringprep profile, and return the result in a newly allocated
     429                 :            :  * variable.
     430                 :            :  *
     431                 :            :  * Note that you must convert strings entered in the systems locale
     432                 :            :  * into UTF-8 before using this function, see
     433                 :            :  * stringprep_locale_to_utf8().
     434                 :            :  *
     435                 :            :  * The output @out variable must be deallocated by the caller.
     436                 :            :  *
     437                 :            :  * The @flags are one of #Stringprep_profile_flags values, or 0.
     438                 :            :  *
     439                 :            :  * The @profile specifies the name of the stringprep profile to use.
     440                 :            :  * It must be one of the internally supported stringprep profiles.
     441                 :            :  *
     442                 :            :  * Return value: Returns %STRINGPREP_OK iff successful, or an error code.
     443                 :            :  **/
     444                 :            : int
     445                 :         74 : stringprep_profile (const char *in,
     446                 :            :                     char **out,
     447                 :            :                     const char *profile, Stringprep_profile_flags flags)
     448                 :            : {
     449                 :            :   const Stringprep_profiles *p;
     450                 :         74 :   char *str = NULL;
     451                 :         74 :   size_t len = strlen (in) + 1;
     452                 :            :   int rc;
     453                 :            : 
     454         [ +  - ]:        187 :   for (p = &stringprep_profiles[0]; p->name; p++)
     455         [ +  + ]:        187 :     if (strcmp (p->name, profile) == 0)
     456                 :         74 :       break;
     457                 :            : 
     458 [ +  - ][ +  - ]:         74 :   if (!p || !p->name || !p->tables)
                 [ -  + ]
     459                 :          0 :     return STRINGPREP_UNKNOWN_PROFILE;
     460                 :            : 
     461                 :            :   do
     462                 :            :     {
     463                 :         79 :       free (str);
     464                 :         79 :       str = (char *) malloc (len);
     465         [ -  + ]:         79 :       if (str == NULL)
     466                 :          0 :         return STRINGPREP_MALLOC_ERROR;
     467                 :            : 
     468                 :         79 :       strcpy (str, in);
     469                 :            : 
     470                 :         79 :       rc = stringprep (str, len, flags, p->tables);
     471                 :         79 :       len += 50;
     472                 :            :     }
     473         [ +  + ]:         79 :   while (rc == STRINGPREP_TOO_SMALL_BUFFER);
     474                 :            : 
     475         [ +  + ]:         74 :   if (rc == STRINGPREP_OK)
     476                 :         41 :     *out = str;
     477                 :            :   else
     478                 :         33 :     free (str);
     479                 :            : 
     480                 :         74 :   return rc;
     481                 :            : }
     482                 :            : 
     483                 :            : /*! \mainpage GNU Internationalized Domain Name Library
     484                 :            :  *
     485                 :            :  * \section intro Introduction
     486                 :            :  *
     487                 :            :  * GNU Libidn is an implementation of the Stringprep, Punycode and IDNA
     488                 :            :  * specifications defined by the IETF Internationalized Domain Names
     489                 :            :  * (IDN) working group, used for internationalized domain names.  The
     490                 :            :  * package is available under the GNU Lesser General Public License.
     491                 :            :  *
     492                 :            :  * The library contains a generic Stringprep implementation that does
     493                 :            :  * Unicode 3.2 NFKC normalization, mapping and prohibitation of
     494                 :            :  * characters, and bidirectional character handling.  Profiles for
     495                 :            :  * Nameprep, iSCSI, SASL and XMPP are included.  Punycode and ASCII
     496                 :            :  * Compatible Encoding (ACE) via IDNA are supported.  A mechanism to
     497                 :            :  * define Top-Level Domain (TLD) specific validation tables, and to
     498                 :            :  * compare strings against those tables, is included.  Default tables
     499                 :            :  * for some TLDs are also included.
     500                 :            :  *
     501                 :            :  * The Stringprep API consists of two main functions, one for
     502                 :            :  * converting data from the system's native representation into UTF-8,
     503                 :            :  * and one function to perform the Stringprep processing.  Adding a
     504                 :            :  * new Stringprep profile for your application within the API is
     505                 :            :  * straightforward.  The Punycode API consists of one encoding
     506                 :            :  * function and one decoding function.  The IDNA API consists of the
     507                 :            :  * ToASCII and ToUnicode functions, as well as an high-level interface
     508                 :            :  * for converting entire domain names to and from the ACE encoded
     509                 :            :  * form.  The TLD API consists of one set of functions to extract the
     510                 :            :  * TLD name from a domain string, one set of functions to locate the
     511                 :            :  * proper TLD table to use based on the TLD name, and core functions
     512                 :            :  * to validate a string against a TLD table, and some utility wrappers
     513                 :            :  * to perform all the steps in one call.
     514                 :            :  *
     515                 :            :  * The library is used by, e.g., GNU SASL and Shishi to process user
     516                 :            :  * names and passwords.  Libidn can be built into GNU Libc to enable a
     517                 :            :  * new system-wide getaddrinfo() flag for IDN processing.
     518                 :            :  *
     519                 :            :  * Libidn is developed for the GNU/Linux system, but runs on over 20 Unix
     520                 :            :  * platforms (including Solaris, IRIX, AIX, and Tru64) and Windows.
     521                 :            :  * Libidn is written in C and (parts of) the API is accessible from C,
     522                 :            :  * C++, Emacs Lisp, Python and Java.
     523                 :            :  *
     524                 :            :  * The project web page:\n
     525                 :            :  * http://www.gnu.org/software/libidn/
     526                 :            :  *
     527                 :            :  * The software archive:\n
     528                 :            :  * ftp://alpha.gnu.org/pub/gnu/libidn/
     529                 :            :  *
     530                 :            :  * For more information see:\n
     531                 :            :  * http://www.ietf.org/html.charters/idn-charter.html\n
     532                 :            :  * http://www.ietf.org/rfc/rfc3454.txt (stringprep specification)\n
     533                 :            :  * http://www.ietf.org/rfc/rfc3490.txt (idna specification)\n
     534                 :            :  * http://www.ietf.org/rfc/rfc3491.txt (nameprep specification)\n
     535                 :            :  * http://www.ietf.org/rfc/rfc3492.txt (punycode specification)\n
     536                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-ips-iscsi-string-prep-04.txt\n
     537                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-utf8-profile-01.txt\n
     538                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-sasl-anon-00.txt\n
     539                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-sasl-saslprep-00.txt\n
     540                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-xmpp-nodeprep-01.txt\n
     541                 :            :  * http://www.ietf.org/internet-drafts/draft-ietf-xmpp-resourceprep-01.txt\n
     542                 :            :  *
     543                 :            :  * Further information and paid contract development:\n
     544                 :            :  * Simon Josefsson <simon@josefsson.org>
     545                 :            :  *
     546                 :            :  * \section examples Examples
     547                 :            :  *
     548                 :            :  * \include example.c
     549                 :            :  * \include example3.c
     550                 :            :  * \include example4.c
     551                 :            :  * \include example5.c
     552                 :            :  */
     553                 :            : 
     554                 :            : /**
     555                 :            :  * STRINGPREP_VERSION
     556                 :            :  *
     557                 :            :  * String defined via CPP denoting the header file version number.
     558                 :            :  * Used together with stringprep_check_version() to verify header file
     559                 :            :  * and run-time library consistency.
     560                 :            :  */
     561                 :            : 
     562                 :            : /**
     563                 :            :  * STRINGPREP_MAX_MAP_CHARS
     564                 :            :  *
     565                 :            :  * Maximum number of code points that can replace a single code point,
     566                 :            :  * during stringprep mapping.
     567                 :            :  */
     568                 :            : 
     569                 :            : /**
     570                 :            :  * Stringprep_rc:
     571                 :            :  * @STRINGPREP_OK: Successful operation.  This value is guaranteed to
     572                 :            :  *   always be zero, the remaining ones are only guaranteed to hold
     573                 :            :  *   non-zero values, for logical comparison purposes.
     574                 :            :  * @STRINGPREP_CONTAINS_UNASSIGNED: String contain unassigned Unicode
     575                 :            :  *   code points, which is forbidden by the profile.
     576                 :            :  * @STRINGPREP_CONTAINS_PROHIBITED: String contain code points
     577                 :            :  *   prohibited by the profile.
     578                 :            :  * @STRINGPREP_BIDI_BOTH_L_AND_RAL: String contain code points with
     579                 :            :  *   conflicting bidirection category.
     580                 :            :  * @STRINGPREP_BIDI_LEADTRAIL_NOT_RAL: Leading and trailing character
     581                 :            :  *   in string not of proper bidirectional category.
     582                 :            :  * @STRINGPREP_BIDI_CONTAINS_PROHIBITED: Contains prohibited code
     583                 :            :  *   points detected by bidirectional code.
     584                 :            :  * @STRINGPREP_TOO_SMALL_BUFFER: Buffer handed to function was too
     585                 :            :  *   small.  This usually indicate a problem in the calling
     586                 :            :  *   application.
     587                 :            :  * @STRINGPREP_PROFILE_ERROR: The stringprep profile was inconsistent.
     588                 :            :  *   This usually indicate an internal error in the library.
     589                 :            :  * @STRINGPREP_FLAG_ERROR: The supplied flag conflicted with profile.
     590                 :            :  *   This usually indicate a problem in the calling application.
     591                 :            :  * @STRINGPREP_UNKNOWN_PROFILE: The supplied profile name was not
     592                 :            :  *   known to the library.
     593                 :            :  * @STRINGPREP_NFKC_FAILED: The Unicode NFKC operation failed.  This
     594                 :            :  *   usually indicate an internal error in the library.
     595                 :            :  * @STRINGPREP_MALLOC_ERROR: The malloc() was out of memory.  This is
     596                 :            :  *   usually a fatal error.
     597                 :            :  *
     598                 :            :  * Enumerated return codes of stringprep(), stringprep_profile()
     599                 :            :  * functions (and macros using those functions).  The value 0 is
     600                 :            :  * guaranteed to always correspond to success.
     601                 :            :  */
     602                 :            : 
     603                 :            : /**
     604                 :            :  * Stringprep_profile_flags:
     605                 :            :  * @STRINGPREP_NO_NFKC: Disable the NFKC normalization, as well as
     606                 :            :  *   selecting the non-NFKC case folding tables.  Usually the profile
     607                 :            :  *   specifies BIDI and NFKC settings, and applications should not
     608                 :            :  *   override it unless in special situations.
     609                 :            :  * @STRINGPREP_NO_BIDI: Disable the BIDI step.  Usually the profile
     610                 :            :  *   specifies BIDI and NFKC settings, and applications should not
     611                 :            :  *   override it unless in special situations.
     612                 :            :  * @STRINGPREP_NO_UNASSIGNED: Make the library return with an error if
     613                 :            :  *   string contains unassigned characters according to profile.
     614                 :            :  *
     615                 :            :  * Stringprep profile flags.
     616                 :            :  */
     617                 :            : 
     618                 :            : /**
     619                 :            :  * Stringprep_profile_steps:
     620                 :            :  * @STRINGPREP_NFKC: The NFKC step.
     621                 :            :  * @STRINGPREP_BIDI: The BIDI step.
     622                 :            :  * @STRINGPREP_MAP_TABLE: The MAP step.
     623                 :            :  * @STRINGPREP_UNASSIGNED_TABLE: The Unassigned step.
     624                 :            :  * @STRINGPREP_PROHIBIT_TABLE: The Prohibited step.
     625                 :            :  * @STRINGPREP_BIDI_PROHIBIT_TABLE: The BIDI-Prohibited step.
     626                 :            :  * @STRINGPREP_BIDI_RAL_TABLE: The BIDI-RAL step.
     627                 :            :  * @STRINGPREP_BIDI_L_TABLE: The BIDI-L step.
     628                 :            :  *
     629                 :            :  * Various steps in the stringprep algorithm.  You really want to
     630                 :            :  * study the source code to understand this one.  Only useful if you
     631                 :            :  * want to add another profile.
     632                 :            :  */
     633                 :            : 
     634                 :            : /**
     635                 :            :  * stringprep_nameprep:
     636                 :            :  * @in: input/ouput array with string to prepare.
     637                 :            :  * @maxlen: maximum length of input/output array.
     638                 :            :  *
     639                 :            :  * Prepare the input UTF-8 string according to the nameprep profile.
     640                 :            :  * The AllowUnassigned flag is true, use
     641                 :            :  * stringprep_nameprep_no_unassigned() if you want a false
     642                 :            :  * AllowUnassigned.  Returns 0 iff successful, or an error code.
     643                 :            :  **/
     644                 :            : 
     645                 :            : /**
     646                 :            :  * stringprep_nameprep_no_unassigned:
     647                 :            :  * @in: input/ouput array with string to prepare.
     648                 :            :  * @maxlen: maximum length of input/output array.
     649                 :            :  *
     650                 :            :  * Prepare the input UTF-8 string according to the nameprep profile.
     651                 :            :  * The AllowUnassigned flag is false, use stringprep_nameprep() for
     652                 :            :  * true AllowUnassigned.  Returns 0 iff successful, or an error code.
     653                 :            :  **/
     654                 :            : 
     655                 :            : /**
     656                 :            :  * stringprep_iscsi:
     657                 :            :  * @in: input/ouput array with string to prepare.
     658                 :            :  * @maxlen: maximum length of input/output array.
     659                 :            :  *
     660                 :            :  * Prepare the input UTF-8 string according to the draft iSCSI
     661                 :            :  * stringprep profile.  Returns 0 iff successful, or an error code.
     662                 :            :  **/
     663                 :            : 
     664                 :            : /**
     665                 :            :  * stringprep_plain:
     666                 :            :  * @in: input/ouput array with string to prepare.
     667                 :            :  * @maxlen: maximum length of input/output array.
     668                 :            :  *
     669                 :            :  * Prepare the input UTF-8 string according to the draft SASL
     670                 :            :  * ANONYMOUS profile.  Returns 0 iff successful, or an error code.
     671                 :            :  **/
     672                 :            : 
     673                 :            : /**
     674                 :            :  * stringprep_xmpp_nodeprep:
     675                 :            :  * @in: input/ouput array with string to prepare.
     676                 :            :  * @maxlen: maximum length of input/output array.
     677                 :            :  *
     678                 :            :  * Prepare the input UTF-8 string according to the draft XMPP node
     679                 :            :  * identifier profile.  Returns 0 iff successful, or an error code.
     680                 :            :  **/
     681                 :            : 
     682                 :            : /**
     683                 :            :  * stringprep_xmpp_resourceprep:
     684                 :            :  * @in: input/ouput array with string to prepare.
     685                 :            :  * @maxlen: maximum length of input/output array.
     686                 :            :  *
     687                 :            :  * Prepare the input UTF-8 string according to the draft XMPP resource
     688                 :            :  * identifier profile.  Returns 0 iff successful, or an error code.
     689                 :            :  **/

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