contrib/bind-9.5.2/lib/isc/include/isc/base64.h

   1 /*
   2  * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: base64.h,v 1.22 2007/06/19 23:47:18 tbox Exp $ */
  19
  20 #ifndef ISC_BASE64_H
  21 #define ISC_BASE64_H 1
  22
  23 /*! \file isc/base64.h */
  24
  25 #include <isc/lang.h>
  26 #include <isc/types.h>
  27
  28 ISC_LANG_BEGINDECLS
  29
  30 /***
  31  *** Functions
  32  ***/
  33
  34 isc_result_t
  35 isc_base64_totext(isc_region_t *source, int wordlength,
  36                   const char *wordbreak, isc_buffer_t *target);
  37 /*!<
  38  * \brief Convert data into base64 encoded text.
  39  *
  40  * Notes:
  41  *\li   The base64 encoded text in 'target' will be divided into
  42  *      words of at most 'wordlength' characters, separated by
  43  *      the 'wordbreak' string.  No parentheses will surround
  44  *      the text.
  45  *
  46  * Requires:
  47  *\li   'source' is a region containing binary data
  48  *\li   'target' is a text buffer containing available space
  49  *\li   'wordbreak' points to a null-terminated string of
  50  *              zero or more whitespace characters
  51  *
  52  * Ensures:
  53  *\li   target will contain the base64 encoded version of the data
  54  *      in source.  The 'used' pointer in target will be advanced as
  55  *      necessary.
  56  */
  57
  58 isc_result_t
  59 isc_base64_decodestring(const char *cstr, isc_buffer_t *target);
  60 /*!<
  61  * \brief Decode a null-terminated base64 string.
  62  *
  63  * Requires:
  64  *\li   'cstr' is non-null.
  65  *\li   'target' is a valid buffer.
  66  *
  67  * Returns:
  68  *\li   #ISC_R_SUCCESS  -- the entire decoded representation of 'cstring'
  69  *                         fit in 'target'.
  70  *\li   #ISC_R_BADBASE64 -- 'cstr' is not a valid base64 encoding.
  71  *
  72  *      Other error returns are any possible error code from:
  73  *\li           isc_lex_create(),
  74  *\li           isc_lex_openbuffer(),
  75  *\li           isc_base64_tobuffer().
  76  */
  77
  78 isc_result_t
  79 isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
  80 /*!<
  81  * \brief Convert base64 encoded text from a lexer context into data.
  82  *
  83  * Requires:
  84  *\li   'lex' is a valid lexer context
  85  *\li   'target' is a buffer containing binary data
  86  *\li   'length' is an integer
  87  *
  88  * Ensures:
  89  *\li   target will contain the data represented by the base64 encoded
  90  *      string parsed by the lexer.  No more than length bytes will be read,
  91  *      if length is positive.  The 'used' pointer in target will be
  92  *      advanced as necessary.
  93  */
  94
  95
  96
  97 ISC_LANG_ENDDECLS
  98
  99 #endif /* ISC_BASE64_H */