You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
263 lines
9.3 KiB
263 lines
9.3 KiB
/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
** SUCH DAMAGE.
|
|
**
|
|
** There is more copyright information in the bottom half of this file.
|
|
** Please see it for more details. */
|
|
|
|
|
|
/*=========================================================================
|
|
** XML-RPC Base64 Utilities
|
|
**=========================================================================
|
|
** This code was swiped from Jack Jansen's code in Python 1.5.2 and
|
|
** modified to work with our data types.
|
|
*/
|
|
|
|
#include "xmlrpc_config.h"
|
|
|
|
#include "xmlrpc.h"
|
|
|
|
#define CRLF "\015\012"
|
|
#define CR '\015'
|
|
#define LF '\012'
|
|
|
|
|
|
/***********************************************************
|
|
Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
|
|
Amsterdam, The Netherlands.
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
|
|
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
static char table_a2b_base64[] = {
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
|
|
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, /* Note PAD->0 */
|
|
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
|
|
15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
|
|
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
|
|
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
|
|
};
|
|
|
|
#define BASE64_PAD '='
|
|
#define BASE64_MAXBIN 57 /* Max binary chunk size (76 char line) */
|
|
#define BASE64_LINE_SZ 128 /* Buffer size for a single line. */
|
|
|
|
static unsigned char table_b2a_base64[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
static xmlrpc_mem_block *
|
|
xmlrpc_base64_encode_internal (xmlrpc_env *env,
|
|
unsigned char *bin_data,
|
|
size_t bin_len,
|
|
int want_newlines)
|
|
{
|
|
size_t chunk_start, chunk_left;
|
|
unsigned char *ascii_data;
|
|
int leftbits;
|
|
unsigned char this_ch;
|
|
unsigned int leftchar;
|
|
xmlrpc_mem_block *output;
|
|
unsigned char line_buffer[BASE64_LINE_SZ];
|
|
|
|
/* Create a block to hold our lines when we finish them. */
|
|
output = xmlrpc_mem_block_new(env, 0);
|
|
XMLRPC_FAIL_IF_FAULT(env);
|
|
|
|
/* Deal with empty data blocks gracefully. Yuck. */
|
|
if (bin_len == 0) {
|
|
if (want_newlines)
|
|
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, CRLF, 2);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Process our binary data in line-sized chunks. */
|
|
for (chunk_start=0; chunk_start < bin_len; chunk_start += BASE64_MAXBIN) {
|
|
|
|
/* Set up our per-line state. */
|
|
ascii_data = &line_buffer[0];
|
|
chunk_left = bin_len - chunk_start;
|
|
if (chunk_left > BASE64_MAXBIN)
|
|
chunk_left = BASE64_MAXBIN;
|
|
leftbits = 0;
|
|
leftchar = 0;
|
|
|
|
for(; chunk_left > 0; chunk_left--, bin_data++) {
|
|
/* Shift the data into our buffer */
|
|
leftchar = (leftchar << 8) | *bin_data;
|
|
leftbits += 8;
|
|
|
|
/* See if there are 6-bit groups ready */
|
|
while (leftbits >= 6) {
|
|
this_ch = (leftchar >> (leftbits-6)) & 0x3f;
|
|
leftbits -= 6;
|
|
*ascii_data++ = table_b2a_base64[this_ch];
|
|
}
|
|
}
|
|
if (leftbits == 2) {
|
|
*ascii_data++ = table_b2a_base64[(leftchar&3) << 4];
|
|
*ascii_data++ = BASE64_PAD;
|
|
*ascii_data++ = BASE64_PAD;
|
|
} else if (leftbits == 4) {
|
|
*ascii_data++ = table_b2a_base64[(leftchar&0xf) << 2];
|
|
*ascii_data++ = BASE64_PAD;
|
|
}
|
|
|
|
/* Append a courtesy CRLF. */
|
|
if (want_newlines) {
|
|
*ascii_data++ = CR;
|
|
*ascii_data++ = LF;
|
|
}
|
|
|
|
/* Save our line. */
|
|
XMLRPC_TYPED_MEM_BLOCK_APPEND(char, env, output, line_buffer,
|
|
ascii_data - &line_buffer[0]);
|
|
XMLRPC_FAIL_IF_FAULT(env);
|
|
}
|
|
|
|
cleanup:
|
|
if (env->fault_occurred) {
|
|
if (output)
|
|
xmlrpc_mem_block_free(output);
|
|
return NULL;
|
|
}
|
|
return output;
|
|
}
|
|
|
|
|
|
xmlrpc_mem_block *
|
|
xmlrpc_base64_encode (xmlrpc_env *env, unsigned char *bin_data, size_t bin_len)
|
|
{
|
|
return xmlrpc_base64_encode_internal(env, bin_data, bin_len, 1);
|
|
}
|
|
|
|
|
|
xmlrpc_mem_block *
|
|
xmlrpc_base64_encode_without_newlines (xmlrpc_env *env,
|
|
unsigned char *bin_data,
|
|
size_t bin_len)
|
|
{
|
|
return xmlrpc_base64_encode_internal(env, bin_data, bin_len, 0);
|
|
}
|
|
|
|
|
|
xmlrpc_mem_block *
|
|
xmlrpc_base64_decode (xmlrpc_env *env,
|
|
char *ascii_data,
|
|
size_t ascii_len)
|
|
{
|
|
unsigned char *bin_data;
|
|
int leftbits;
|
|
unsigned char this_ch;
|
|
unsigned int leftchar;
|
|
size_t npad;
|
|
size_t bin_len, buffer_size;
|
|
xmlrpc_mem_block *output;
|
|
|
|
/* Create a block to hold our chunks when we finish them.
|
|
** We overestimate the size now, and fix it later. */
|
|
buffer_size = ((ascii_len+3)/4)*3;
|
|
output = xmlrpc_mem_block_new(env, buffer_size);
|
|
XMLRPC_FAIL_IF_FAULT(env);
|
|
|
|
/* Set up our decoder state. */
|
|
leftbits = 0;
|
|
leftchar = 0;
|
|
npad = 0;
|
|
bin_data = XMLRPC_TYPED_MEM_BLOCK_CONTENTS(unsigned char, output);
|
|
bin_len = 0;
|
|
|
|
for( ; ascii_len > 0 ; ascii_len--, ascii_data++ ) {
|
|
|
|
/* Skip some punctuation. */
|
|
this_ch = (*ascii_data & 0x7f);
|
|
if ( this_ch == '\r' || this_ch == '\n' || this_ch == ' ' )
|
|
continue;
|
|
if ( this_ch == BASE64_PAD )
|
|
npad++;
|
|
this_ch = table_a2b_base64[(*ascii_data) & 0x7f];
|
|
|
|
/* XXX - We just throw away invalid characters. Is this right? */
|
|
if ( this_ch == (unsigned char) -1 ) continue;
|
|
|
|
/* Shift it in on the low end, and see if there's
|
|
** a byte ready for output. */
|
|
leftchar = (leftchar << 6) | (this_ch);
|
|
leftbits += 6;
|
|
if ( leftbits >= 8 ) {
|
|
leftbits -= 8;
|
|
XMLRPC_ASSERT(bin_len < buffer_size);
|
|
*bin_data++ = (leftchar >> leftbits) & 0xFF;
|
|
leftchar &= ((1 << leftbits) - 1);
|
|
bin_len++;
|
|
}
|
|
}
|
|
|
|
/* Check that no bits are left. */
|
|
if ( leftbits )
|
|
XMLRPC_FAIL(env, XMLRPC_PARSE_ERROR, "Incorrect Base64 padding");
|
|
|
|
/* Check to make sure we have a sane amount of padding. */
|
|
if (npad > bin_len || npad > 2)
|
|
XMLRPC_FAIL(env, XMLRPC_PARSE_ERROR, "Malformed Base64 data");
|
|
|
|
/* Remove any padding and set the correct size. */
|
|
bin_len -= npad;
|
|
XMLRPC_TYPED_MEM_BLOCK_RESIZE(char, env, output, bin_len);
|
|
XMLRPC_ASSERT(!env->fault_occurred);
|
|
|
|
cleanup:
|
|
if (env->fault_occurred) {
|
|
if (output)
|
|
xmlrpc_mem_block_free(output);
|
|
return NULL;
|
|
}
|
|
return output;
|
|
}
|