+++ /dev/null
-/*
-
- silcstringprep.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 2004 - 2005 Pekka Riikonen
-
- 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; version 2 of the License.
-
- 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.
-
-*/
-
-#include "silc.h"
-#include "silcstringprep.h"
-#include "stringprep.h"
-
-/* We use GNU Libidn which has stringprep to do the magic. Only bad thing
- is that its interface is idiotic. We have our own API here in case
- we'll implement it ourselves later. */
-
-/* Prohibited characters as defined by the protocol in Appendix C */
-const Stringprep_table_element silc_appendix_c[] =
-{
- {0x000021}, {0x00002A}, {0x00002C}, {0x00003F}, {0x000040},
- {0}
-};
-
-/* Prohibited characters as defined by the protocol in Appendix D */
-const Stringprep_table_element silc_appendix_d[] =
-{
- {0x0000A2, 0x0000A9},
- {0x0000AC}, {0x0000AE}, {0x0000AF}, {0x0000B0}, {0x0000B1}, {0x0000B4},
- {0x0000B6}, {0x0000B8}, {0x0000D7}, {0x0000F7},
- {0x0002C2, 0x0002C5}, {0x0002D2, 0x0002FF},
- {0x000374}, {0x000375}, {0x000384}, {0x000385}, {0x0003F6}, {0x000482},
- {0x00060E}, {0x00060F}, {0x0006E9}, {0x0006FD}, {0x0006FE}, {0x0009F2},
- {0x0009F3}, {0x0009FA}, {0x000AF1}, {0x000B70},
- {0x000BF3, 0x000BFA}, {0x000E3F},
- {0x000F01, 0x000F03}, {0x000F13, 0x000F17}, {0x000F1A, 0x000F1F},
- {0x000F34}, {0x000F36}, {0x000F38}, {0x000FBE}, {0x000FBF},
- {0x000FC0, 0x000FC5}, {0x000FC7, 0x000FCF}, {0x0017DB}, {0x001940},
- {0x0019E0, 0x0019FF}, {0x001FBD}, {0x001FBF, 0x001FC1},
- {0x001FCD, 0x001FCF}, {0x001FDD, 0x001FDF}, {0x001FED, 0x001FEF},
- {0x001FFD}, {0x001FFE}, {0x002044}, {0x002052}, {0x00207A, 0x00207C},
- {0x00208A, 0x00208C}, {0x0020A0, 0x0020B1}, {0x002100, 0x00214F},
- {0x002150, 0x00218F}, {0x002190, 0x0021FF}, {0x002200, 0x0022FF},
- {0x002300, 0x0023FF}, {0x002400, 0x00243F}, {0x002440, 0x00245F},
- {0x002460, 0x0024FF}, {0x002500, 0x00257F}, {0x002580, 0x00259F},
- {0x0025A0, 0x0025FF}, {0x002600, 0x0026FF}, {0x002700, 0x0027BF},
- {0x0027C0, 0x0027EF}, {0x0027F0, 0x0027FF}, {0x002800, 0x0028FF},
- {0x002900, 0x00297F}, {0x002980, 0x0029FF}, {0x002A00, 0x002AFF},
- {0x002B00, 0x002BFF}, {0x002E9A}, {0x002EF4, 0x002EFF},
- {0x002FF0, 0x002FFF}, {0x00303B, 0x00303D}, {0x003040},
- {0x003095, 0x003098}, {0x00309F, 0x0030A0}, {0x0030FF, 0x003104},
- {0x00312D, 0x003130}, {0x00318F}, {0x0031B8, 0x0031FF},
- {0x00321D, 0x00321F}, {0x003244, 0x00325F}, {0x00327C, 0x00327E},
- {0x0032B1, 0x0032BF}, {0x0032CC, 0x0032CF}, {0x0032FF},
- {0x003377, 0x00337A}, {0x0033DE, 0x0033DF}, {0x0033FF},
- {0x004DB6, 0x004DFF},
- {0x009FA6, 0x009FFF}, {0x00A48D, 0x00A48F}, {0x00A4A2, 0x00A4A3},
- {0x00A4B4}, {0x00A4C1}, {0x00A4C5}, {0x00A4C7, 0x00ABFF},
- {0x00D7A4, 0x00D7FF}, {0x00FA2E, 0x00FAFF}, {0x00FFE0, 0x00FFEE},
- {0x00FFFC}, {0x010000, 0x01007F}, {0x010080, 0x0100FF},
- {0x010100, 0x01013F}, {0x01D000, 0x01D0FF}, {0x01D100, 0x01D1FF},
- {0x01D300, 0x01D35F}, {0x01D400, 0x01D7FF},
- {0x0E0100, 0x0E01EF},
- {0}
-};
-
-/* Default SILC Identifier String profile defined by the protocol */
-const Stringprep_profile stringprep_silc_identifier_prep[] =
-{
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_1},
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_2},
- {STRINGPREP_NFKC, 0, 0},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_1_1},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_1_2},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_2_1},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_2_2},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_3},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_4},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_5},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_6},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_7},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_8},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_9},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_9},
- {STRINGPREP_PROHIBIT_TABLE, 0, silc_appendix_c},
- {STRINGPREP_PROHIBIT_TABLE, 0, silc_appendix_d},
- {STRINGPREP_UNASSIGNED_TABLE, 0, stringprep_rfc3454_A_1},
- {0}
-};
-
-/* Default channel name string profile defined by the protocol */
-const Stringprep_profile stringprep_silc_identifier_ch_prep[] =
-{
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_1},
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_2},
- {STRINGPREP_NFKC, 0, 0},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_1_1},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_1_2},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_2_1},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_2_2},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_3},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_4},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_5},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_6},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_7},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_8},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_9},
- {STRINGPREP_PROHIBIT_TABLE, 0, stringprep_rfc3454_C_9},
- {STRINGPREP_PROHIBIT_TABLE, 0, silc_appendix_d},
- {STRINGPREP_UNASSIGNED_TABLE, 0, stringprep_rfc3454_A_1},
- {0}
-};
-
-/* Identifier string case folding and normalizing */
-const Stringprep_profile stringprep_silc_identifierc_prep[] =
-{
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_1},
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_2},
- {STRINGPREP_NFKC, 0, 0},
- {0}
-};
-
-/* Case folding and normalizing */
-const Stringprep_profile stringprep_silc_casefold_prep[] =
-{
- {STRINGPREP_MAP_TABLE, 0, stringprep_rfc3454_B_2},
- {STRINGPREP_NFKC, 0, 0},
- {0}
-};
-
-
-/* Prepares string according to the profile */
-
-SilcStringprepStatus
-silc_stringprep(const unsigned char *bin, SilcUInt32 bin_len,
- SilcStringEncoding bin_encoding,
- const char *profile_name,
- SilcStringprepFlags flags,
- unsigned char **out, SilcUInt32 *out_len,
- SilcStringEncoding out_encoding)
-{
- Stringprep_profile_flags f = 0;
- const Stringprep_profile *profile;
- unsigned char *utf8s;
- SilcUInt32 utf8s_len;
- int ret;
-
- SILC_LOG_DEBUG(("Preparing string"));
-
- if (!bin || !bin_len || !profile_name)
- return SILC_STRINGPREP_ERR;
-
- /* Convert string to UTF-8 */
- utf8s_len = silc_utf8_encoded_len(bin, bin_len, bin_encoding);
- if (!utf8s_len)
- return SILC_STRINGPREP_ERR_ENCODING;
- utf8s = silc_calloc(utf8s_len + 1, sizeof(*utf8s));
- if (!utf8s)
- return SILC_STRINGPREP_ERR_OUT_OF_MEMORY;
- silc_utf8_encode(bin, bin_len, bin_encoding, utf8s, utf8s_len);
-
- /* Check profile. */
- if (!strcmp(profile_name, SILC_IDENTIFIER_PREP))
- profile = stringprep_silc_identifier_prep;
- else if (!strcmp(profile_name, SILC_IDENTIFIER_CH_PREP))
- profile = stringprep_silc_identifier_ch_prep;
- else if (!strcmp(profile_name, SILC_IDENTIFIERC_PREP))
- profile = stringprep_silc_identifierc_prep;
- else if (!strcmp(profile_name, SILC_CASEFOLD_PREP))
- profile = stringprep_silc_casefold_prep;
- else
- return SILC_STRINGPREP_ERR_UNSUP_PROFILE;
-
- /* Translate flags */
- if (!(flags & SILC_STRINGPREP_ALLOW_UNASSIGNED))
- f |= STRINGPREP_NO_UNASSIGNED;
-
- /* Prepare */
- ret = stringprep((char *)utf8s, utf8s_len, f, profile);
- SILC_LOG_DEBUG(("stringprep() return %d", ret));
-
- /* Since the stringprep() doesn't allocate returned buffer, and
- stringprep_profile() doesn't do it correctly, we can't know how
- much space we must have for the conversion. Allocate more if it
- fails, and try again. */
- if (ret == STRINGPREP_TOO_SMALL_BUFFER) {
- utf8s = silc_realloc(utf8s, sizeof(*utf8s) * ((utf8s_len * 2) + 1));
- if (!utf8s)
- return SILC_STRINGPREP_ERR_OUT_OF_MEMORY;
- memset(utf8s + utf8s_len + 1, 0, utf8s_len);
- ret = stringprep((char *)utf8s, utf8s_len * 2, f, profile);
- SILC_LOG_DEBUG(("stringprep() return %d", ret));
- }
-
- switch (ret) {
- case STRINGPREP_OK:
- ret = SILC_STRINGPREP_OK;
- break;
-
- case STRINGPREP_CONTAINS_UNASSIGNED:
- ret = SILC_STRINGPREP_ERR_UNASSIGNED;
- break;
-
- case STRINGPREP_CONTAINS_PROHIBITED:
- ret = SILC_STRINGPREP_ERR_PROHIBITED;
- break;
-
- case STRINGPREP_BIDI_BOTH_L_AND_RAL:
- ret = SILC_STRINGPREP_ERR_BIDI_RAL_WITH_L;
- break;
-
- case STRINGPREP_BIDI_LEADTRAIL_NOT_RAL:
- ret = SILC_STRINGPREP_ERR_BIDI_RAL;
- break;
-
- case STRINGPREP_BIDI_CONTAINS_PROHIBITED:
- ret = SILC_STRINGPREP_ERR_BIDI_PROHIBITED;
- break;
-
- case STRINGPREP_UNKNOWN_PROFILE:
- ret = SILC_STRINGPREP_ERR_UNSUP_PROFILE;
- break;
-
- case STRINGPREP_MALLOC_ERROR:
- ret = SILC_STRINGPREP_ERR_OUT_OF_MEMORY;
- break;
-
- default:
- ret = SILC_STRINGPREP_ERR;
- break;
- }
-
- /* Convert to desired output character encoding */
- if (ret == SILC_STRINGPREP_OK) {
- if (out && out_len) {
- if (out_encoding != SILC_STRING_UTF8) {
- *out_len = silc_utf8_decoded_len(utf8s, strlen(utf8s), out_encoding);
- if (*out_len) {
- *out = silc_calloc(*out_len + 1, sizeof(**out));
- if (*out) {
- silc_utf8_decode(utf8s, strlen(utf8s), out_encoding, *out,
- *out_len);
- } else {
- ret = SILC_STRINGPREP_ERR_OUT_OF_MEMORY;
- }
- } else {
- ret = SILC_STRINGPREP_ERR_ENCODING;
- }
- } else {
- *out_len = strlen(utf8s);
- *out = silc_memdup(utf8s, *out_len);
- }
- }
- }
-
- silc_free(utf8s);
-
- return (SilcStringprepStatus)ret;
-}
projects / crypto.git / blobdiff