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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef _STRINGPREP_H
  21 #define _STRINGPREP_H
  22
  23 #ifdef __cplusplus
  24 extern "C"
  25 {
  26 #endif
  27
  28 #include <stddef.h>             /* size_t */
  29 #include <unistd.h>             /* ssize_t */
  30 #include <stdint.h>             /* uint32_t */
  31
  32 #define STRINGPREP_VERSION "0.4.3"
  33
  34 /* Error codes. */
  35   typedef enum
  36   {
  37     STRINGPREP_OK = 0,
  38     /* Stringprep errors. */
  39     STRINGPREP_CONTAINS_UNASSIGNED = 1,
  40     STRINGPREP_CONTAINS_PROHIBITED = 2,
  41     STRINGPREP_BIDI_BOTH_L_AND_RAL = 3,
  42     STRINGPREP_BIDI_LEADTRAIL_NOT_RAL = 4,
  43     STRINGPREP_BIDI_CONTAINS_PROHIBITED = 5,
  44     /* Error in calling application. */
  45     STRINGPREP_TOO_SMALL_BUFFER = 100,
  46     STRINGPREP_PROFILE_ERROR = 101,
  47     STRINGPREP_FLAG_ERROR = 102,
  48     STRINGPREP_UNKNOWN_PROFILE = 103,
  49     /* Internal errors. */
  50     STRINGPREP_NFKC_FAILED = 200,
  51     STRINGPREP_MALLOC_ERROR = 201
  52   } Stringprep_rc;
  53
  54 /* Flags used when calling stringprep(). */
  55   typedef enum
  56   {
  57     STRINGPREP_NO_NFKC = 1,
  58     STRINGPREP_NO_BIDI = 2,
  59     STRINGPREP_NO_UNASSIGNED = 4
  60   } Stringprep_profile_flags;
  61
  62 /* Steps in a stringprep profile. */
  63   typedef enum
  64   {
  65     STRINGPREP_NFKC = 1,
  66     STRINGPREP_BIDI = 2,
  67     STRINGPREP_MAP_TABLE = 3,
  68     STRINGPREP_UNASSIGNED_TABLE = 4,
  69     STRINGPREP_PROHIBIT_TABLE = 5,
  70     STRINGPREP_BIDI_PROHIBIT_TABLE = 6,
  71     STRINGPREP_BIDI_RAL_TABLE = 7,
  72     STRINGPREP_BIDI_L_TABLE = 8
  73   } Stringprep_profile_steps;
  74
  75 #define STRINGPREP_MAX_MAP_CHARS 4
  76
  77   struct Stringprep_table_element
  78   {
  79     uint32_t start;
  80     uint32_t end;               /* 0 if only one character */
  81     uint32_t map[STRINGPREP_MAX_MAP_CHARS];     /* NULL if end is not 0 */
  82   };
  83   typedef struct Stringprep_table_element Stringprep_table_element;
  84
  85   struct Stringprep_table
  86   {
  87     Stringprep_profile_steps operation;
  88     Stringprep_profile_flags flags;
  89     const Stringprep_table_element *table;
  90   };
  91   typedef struct Stringprep_table Stringprep_profile;
  92
  93   struct Stringprep_profiles
  94   {
  95     const char *name;
  96     const Stringprep_profile *tables;
  97   };
  98   typedef struct Stringprep_profiles Stringprep_profiles;
  99
 100   extern const Stringprep_profiles stringprep_profiles[];
 101
 102 /* Profiles */
 103   extern const Stringprep_table_element stringprep_rfc3454_A_1[];
 104   extern const Stringprep_table_element stringprep_rfc3454_B_1[];
 105   extern const Stringprep_table_element stringprep_rfc3454_B_2[];
 106   extern const Stringprep_table_element stringprep_rfc3454_B_3[];
 107   extern const Stringprep_table_element stringprep_rfc3454_C_1_1[];
 108   extern const Stringprep_table_element stringprep_rfc3454_C_1_2[];
 109   extern const Stringprep_table_element stringprep_rfc3454_C_2_1[];
 110   extern const Stringprep_table_element stringprep_rfc3454_C_2_2[];
 111   extern const Stringprep_table_element stringprep_rfc3454_C_3[];
 112   extern const Stringprep_table_element stringprep_rfc3454_C_4[];
 113   extern const Stringprep_table_element stringprep_rfc3454_C_5[];
 114   extern const Stringprep_table_element stringprep_rfc3454_C_6[];
 115   extern const Stringprep_table_element stringprep_rfc3454_C_7[];
 116   extern const Stringprep_table_element stringprep_rfc3454_C_8[];
 117   extern const Stringprep_table_element stringprep_rfc3454_C_9[];
 118   extern const Stringprep_table_element stringprep_rfc3454_D_1[];
 119   extern const Stringprep_table_element stringprep_rfc3454_D_2[];
 120
 121   /* Nameprep */
 122
 123   extern const Stringprep_profile stringprep_nameprep[];
 124
 125 #define stringprep_nameprep(in, maxlen)                 \
 126   stringprep(in, maxlen, 0, stringprep_nameprep)
 127
 128 #define stringprep_nameprep_no_unassigned(in, maxlen)                   \
 129   stringprep(in, maxlen, STRINGPREP_NO_UNASSIGNED, stringprep_nameprep)
 130
 131   /* SASL */
 132
 133   extern const Stringprep_profile stringprep_saslprep[];
 134   extern const Stringprep_profile stringprep_plain[];
 135   extern const Stringprep_profile stringprep_trace[];
 136
 137 #define stringprep_plain(in, maxlen)            \
 138   stringprep(in, maxlen, 0, stringprep_plain)
 139
 140   /* Kerberos */
 141
 142   extern const Stringprep_profile stringprep_kerberos5[];
 143
 144 #define stringprep_kerberos5(in, maxlen)                \
 145   stringprep(in, maxlen, 0, stringprep_kerberos5)
 146
 147   /* XMPP */
 148
 149   extern const Stringprep_profile stringprep_xmpp_nodeprep[];
 150   extern const Stringprep_profile stringprep_xmpp_resourceprep[];
 151   extern const Stringprep_table_element stringprep_xmpp_nodeprep_prohibit[];
 152
 153 #define stringprep_xmpp_nodeprep(in, maxlen)            \
 154   stringprep(in, maxlen, 0, stringprep_xmpp_nodeprep)
 155 #define stringprep_xmpp_resourceprep(in, maxlen)                \
 156   stringprep(in, maxlen, 0, stringprep_xmpp_resourceprep)
 157
 158   /* iSCSI */
 159
 160   extern const Stringprep_profile stringprep_iscsi[];
 161
 162 #define stringprep_iscsi(in, maxlen)            \
 163   stringprep(in, maxlen, 0, stringprep_iscsi)
 164
 165   /* API */
 166
 167   extern int stringprep_4i (uint32_t * ucs4, size_t * len, size_t maxucs4len,
 168                             Stringprep_profile_flags flags,
 169                             const Stringprep_profile * profile);
 170   extern int stringprep_4zi (uint32_t * ucs4, size_t maxucs4len,
 171                              Stringprep_profile_flags flags,
 172                              const Stringprep_profile * profile);
 173   extern int stringprep (char *in, size_t maxlen,
 174                          Stringprep_profile_flags flags,
 175                          const Stringprep_profile * profile);
 176
 177   extern int stringprep_profile (const char *in,
 178                                  char **out,
 179                                  const char *profile,
 180                                  Stringprep_profile_flags flags);
 181
 182   extern const char *stringprep_check_version (const char *req_version);
 183
 184 /* Utility */
 185
 186   extern int stringprep_unichar_to_utf8 (uint32_t c, char *outbuf);
 187   extern uint32_t stringprep_utf8_to_unichar (const char *p);
 188
 189   extern uint32_t *stringprep_utf8_to_ucs4 (const char *str, ssize_t len,
 190                                             size_t * items_written);
 191   extern char *stringprep_ucs4_to_utf8 (const uint32_t * str, ssize_t len,
 192                                         size_t * items_read,
 193                                         size_t * items_written);
 194
 195   extern char *stringprep_utf8_nfkc_normalize (const char *str, ssize_t len);
 196   extern uint32_t *stringprep_ucs4_nfkc_normalize (uint32_t * str,
 197                                                    ssize_t len);
 198
 199   extern const char *stringprep_locale_charset (void);
 200   extern char *stringprep_convert (const char *str,
 201                                    const char *to_codeset,
 202                                    const char *from_codeset);
 203   extern char *stringprep_locale_to_utf8 (const char *str);
 204   extern char *stringprep_utf8_to_locale (const char *str);
 205
 206 #ifdef __cplusplus
 207 }
 208 #endif
 209 #endif                          /* _STRINGPREP_H */