libidn/stringprep.h

   1 /* stringprep.h         Header file for stringprep functions.         -*- c -*-
   2  * Copyright (C) 2002, 2003, 2004  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 the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * GNU Libidn is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with GNU Libidn; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #ifndef _STRINGPREP_H
  23 #define _STRINGPREP_H
  24
  25 #ifdef __cplusplus
  26 extern "C"
  27 {
  28 #endif
  29
  30 #include <stddef.h>             /* size_t */
  31 #include <unistd.h>             /* ssize_t */
  32 #include <stdint.h>             /* uint32_t */
  33
  34 #define STRINGPREP_VERSION "0.4.3"
  35
  36 /* Error codes. */
  37   typedef enum
  38   {
  39     STRINGPREP_OK = 0,
  40     /* Stringprep errors. */
  41     STRINGPREP_CONTAINS_UNASSIGNED = 1,
  42     STRINGPREP_CONTAINS_PROHIBITED = 2,
  43     STRINGPREP_BIDI_BOTH_L_AND_RAL = 3,
  44     STRINGPREP_BIDI_LEADTRAIL_NOT_RAL = 4,
  45     STRINGPREP_BIDI_CONTAINS_PROHIBITED = 5,
  46     /* Error in calling application. */
  47     STRINGPREP_TOO_SMALL_BUFFER = 100,
  48     STRINGPREP_PROFILE_ERROR = 101,
  49     STRINGPREP_FLAG_ERROR = 102,
  50     STRINGPREP_UNKNOWN_PROFILE = 103,
  51     /* Internal errors. */
  52     STRINGPREP_NFKC_FAILED = 200,
  53     STRINGPREP_MALLOC_ERROR = 201
  54   } Stringprep_rc;
  55
  56 /* Flags used when calling stringprep(). */
  57   typedef enum
  58   {
  59     STRINGPREP_NO_NFKC = 1,
  60     STRINGPREP_NO_BIDI = 2,
  61     STRINGPREP_NO_UNASSIGNED = 4
  62   } Stringprep_profile_flags;
  63
  64 /* Steps in a stringprep profile. */
  65   typedef enum
  66   {
  67     STRINGPREP_NFKC = 1,
  68     STRINGPREP_BIDI = 2,
  69     STRINGPREP_MAP_TABLE = 3,
  70     STRINGPREP_UNASSIGNED_TABLE = 4,
  71     STRINGPREP_PROHIBIT_TABLE = 5,
  72     STRINGPREP_BIDI_PROHIBIT_TABLE = 6,
  73     STRINGPREP_BIDI_RAL_TABLE = 7,
  74     STRINGPREP_BIDI_L_TABLE = 8
  75   } Stringprep_profile_steps;
  76
  77 #define STRINGPREP_MAX_MAP_CHARS 4
  78
  79   struct Stringprep_table_element
  80   {
  81     uint32_t start;
  82     uint32_t end;               /* 0 if only one character */
  83     uint32_t map[STRINGPREP_MAX_MAP_CHARS];     /* NULL if end is not 0 */
  84   };
  85   typedef struct Stringprep_table_element Stringprep_table_element;
  86
  87   struct Stringprep_table
  88   {
  89     Stringprep_profile_steps operation;
  90     Stringprep_profile_flags flags;
  91     const Stringprep_table_element *table;
  92   };
  93   typedef struct Stringprep_table Stringprep_profile;
  94
  95   struct Stringprep_profiles
  96   {
  97     const char *name;
  98     const Stringprep_profile *tables;
  99   };
 100   typedef struct Stringprep_profiles Stringprep_profiles;
 101
 102   extern const Stringprep_profiles stringprep_profiles[];
 103
 104 /* Profiles */
 105   extern const Stringprep_table_element stringprep_rfc3454_A_1[];
 106   extern const Stringprep_table_element stringprep_rfc3454_B_1[];
 107   extern const Stringprep_table_element stringprep_rfc3454_B_2[];
 108   extern const Stringprep_table_element stringprep_rfc3454_B_3[];
 109   extern const Stringprep_table_element stringprep_rfc3454_C_1_1[];
 110   extern const Stringprep_table_element stringprep_rfc3454_C_1_2[];
 111   extern const Stringprep_table_element stringprep_rfc3454_C_2_1[];
 112   extern const Stringprep_table_element stringprep_rfc3454_C_2_2[];
 113   extern const Stringprep_table_element stringprep_rfc3454_C_3[];
 114   extern const Stringprep_table_element stringprep_rfc3454_C_4[];
 115   extern const Stringprep_table_element stringprep_rfc3454_C_5[];
 116   extern const Stringprep_table_element stringprep_rfc3454_C_6[];
 117   extern const Stringprep_table_element stringprep_rfc3454_C_7[];
 118   extern const Stringprep_table_element stringprep_rfc3454_C_8[];
 119   extern const Stringprep_table_element stringprep_rfc3454_C_9[];
 120   extern const Stringprep_table_element stringprep_rfc3454_D_1[];
 121   extern const Stringprep_table_element stringprep_rfc3454_D_2[];
 122
 123   /* Nameprep */
 124
 125   extern const Stringprep_profile stringprep_nameprep[];
 126
 127 #define stringprep_nameprep(in, maxlen)                 \
 128   stringprep(in, maxlen, 0, stringprep_nameprep)
 129
 130 #define stringprep_nameprep_no_unassigned(in, maxlen)                   \
 131   stringprep(in, maxlen, STRINGPREP_NO_UNASSIGNED, stringprep_nameprep)
 132
 133   /* SASL */
 134
 135   extern const Stringprep_profile stringprep_saslprep[];
 136   extern const Stringprep_profile stringprep_plain[];
 137   extern const Stringprep_profile stringprep_trace[];
 138
 139 #define stringprep_plain(in, maxlen)            \
 140   stringprep(in, maxlen, 0, stringprep_plain)
 141
 142   /* Kerberos */
 143
 144   extern const Stringprep_profile stringprep_kerberos5[];
 145
 146 #define stringprep_kerberos5(in, maxlen)                \
 147   stringprep(in, maxlen, 0, stringprep_kerberos5)
 148
 149   /* XMPP */
 150
 151   extern const Stringprep_profile stringprep_xmpp_nodeprep[];
 152   extern const Stringprep_profile stringprep_xmpp_resourceprep[];
 153   extern const Stringprep_table_element stringprep_xmpp_nodeprep_prohibit[];
 154
 155 #define stringprep_xmpp_nodeprep(in, maxlen)            \
 156   stringprep(in, maxlen, 0, stringprep_xmpp_nodeprep)
 157 #define stringprep_xmpp_resourceprep(in, maxlen)                \
 158   stringprep(in, maxlen, 0, stringprep_xmpp_resourceprep)
 159
 160   /* iSCSI */
 161
 162   extern const Stringprep_profile stringprep_iscsi[];
 163
 164 #define stringprep_iscsi(in, maxlen)            \
 165   stringprep(in, maxlen, 0, stringprep_iscsi)
 166
 167   /* API */
 168
 169   extern int stringprep_4i (uint32_t * ucs4, size_t * len, size_t maxucs4len,
 170                             Stringprep_profile_flags flags,
 171                             const Stringprep_profile * profile);
 172   extern int stringprep_4zi (uint32_t * ucs4, size_t maxucs4len,
 173                              Stringprep_profile_flags flags,
 174                              const Stringprep_profile * profile);
 175   extern int stringprep (char *in, size_t maxlen,
 176                          Stringprep_profile_flags flags,
 177                          const Stringprep_profile * profile);
 178
 179   extern int stringprep_profile (const char *in,
 180                                  char **out,
 181                                  const char *profile,
 182                                  Stringprep_profile_flags flags);
 183
 184   extern const char *stringprep_check_version (const char *req_version);
 185
 186 /* Utility */
 187
 188   extern int stringprep_unichar_to_utf8 (uint32_t c, char *outbuf);
 189   extern uint32_t stringprep_utf8_to_unichar (const char *p);
 190
 191   extern uint32_t *stringprep_utf8_to_ucs4 (const char *str, ssize_t len,
 192                                             size_t * items_written);
 193   extern char *stringprep_ucs4_to_utf8 (const uint32_t * str, ssize_t len,
 194                                         size_t * items_read,
 195                                         size_t * items_written);
 196
 197   extern char *stringprep_utf8_nfkc_normalize (const char *str, ssize_t len);
 198   extern uint32_t *stringprep_ucs4_nfkc_normalize (uint32_t * str,
 199                                                    ssize_t len);
 200
 201   extern const char *stringprep_locale_charset (void);
 202   extern char *stringprep_convert (const char *str,
 203                                    const char *to_codeset,
 204                                    const char *from_codeset);
 205   extern char *stringprep_locale_to_utf8 (const char *str);
 206   extern char *stringprep_utf8_to_locale (const char *str);
 207
 208 #ifdef __cplusplus
 209 }
 210 #endif
 211 #endif                          /* _STRINGPREP_H */