1
/* Copyright (C) 2003 MySQL AB
3
This program is free software; you can redistribute it and/or modify
4
it under the terms of the GNU General Public License as published by
5
the Free Software Foundation; version 2 of the License.
7
This program is distributed in the hope that it will be useful,
8
but WITHOUT ANY WARRANTY; without even the implied warranty of
9
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10
GNU General Public License for more details.
12
You should have received a copy of the GNU General Public License
13
along with this program; if not, write to the Free Software
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
16
#include <drizzled/global.h>
17
#include <mystrings/m_string.h> /* strchr() */
18
#include <mystrings/m_ctype.h> /* my_isspace() */
19
#include <mysys/base64.h>
23
#if defined(CMATH_NAMESPACE)
24
using namespace CMATH_NAMESPACE;
29
static char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
30
"abcdefghijklmnopqrstuvwxyz"
35
base64_needed_encoded_length(int length_of_data)
38
nb_base64_chars= (length_of_data + 2) / 3 * 4;
41
nb_base64_chars + /* base64 char incl padding */
42
(nb_base64_chars - 1)/ 76 + /* newlines */
43
1; /* NUL termination of string */
48
base64_needed_decoded_length(int length_of_encoded_data)
50
return (int) ceil((double)(length_of_encoded_data * 3 / 4));
55
Encode a data as base64.
57
Note: We require that dst is pre-allocated to correct size.
58
See base64_needed_encoded_length().
62
base64_encode(const void *src, size_t src_len, char *dst)
64
const unsigned char *s= (const unsigned char*)src;
68
for (; i < src_len; len += 4)
90
*dst++= base64_table[(c >> 18) & 0x3f];
91
*dst++= base64_table[(c >> 12) & 0x3f];
93
if (i > (src_len + 1))
96
*dst++= base64_table[(c >> 6) & 0x3f];
101
*dst++= base64_table[(c >> 0) & 0x3f];
112
return (uint32_t) (strchr(base64_table, c) - base64_table);
116
#define SKIP_SPACE(src, i, size) \
118
while (i < size && my_isspace(&my_charset_utf8_general_ci, * src)) \
131
Decode a base64 string
135
src Pointer to base64-encoded string
136
len Length of string at 'src'
137
dst Pointer to location where decoded data will be stored
138
end_ptr Pointer to variable that will refer to the character
139
after the end of the encoded data that were decoded. Can
144
The base64-encoded data in the range ['src','*end_ptr') will be
145
decoded and stored starting at 'dst'. The decoding will stop
146
after 'len' characters have been read from 'src', or when padding
147
occurs in the base64-encoded data. In either case: if 'end_ptr' is
148
non-null, '*end_ptr' will be set to point to the character after
149
the last read character, even in the presence of error.
152
We require that 'dst' is pre-allocated to correct size.
155
base64_needed_decoded_length().
158
Number of bytes written at 'dst' or -1 in case of failure
161
base64_decode(const char *src_base, size_t len,
162
void *dst, const char **end_ptr)
166
char *dst_base= (char *)dst;
167
char const *src= src_base;
176
SKIP_SPACE(src, i, len);
182
SKIP_SPACE(src, i, len);
188
SKIP_SPACE(src, i, len);
194
src += 2; /* There should be two bytes padding */
203
SKIP_SPACE(src, i, len);
209
src += 1; /* There should be one byte padding */
217
b[0]= (c >> 16) & 0xff;
218
b[1]= (c >> 8) & 0xff;
219
b[2]= (c >> 0) & 0xff;
221
for (j=0; j<3-mark; j++)
229
The variable 'i' is set to 'len' when padding has been read, so it
230
does not actually reflect the number of bytes read from 'src'.
232
return i != len ? -1 : d - dst_base;
238
#define require(b) { \
240
printf("Require failed at %s:%d\n", __FILE__, __LINE__); \
253
size_t needed_length;
255
for (i= 0; i < 500; i++)
257
/* Create source data */
258
const size_t src_len= rand() % 1000 + 1;
260
char * src= (char *) malloc(src_len);
266
for (j= 0; j<src_len; j++)
273
needed_length= base64_needed_encoded_length(src_len);
274
str= (char *) malloc(needed_length);
276
for (k= 0; k < needed_length; k++)
277
str[k]= 0xff; /* Fill memory to check correct NUL termination */
278
require(base64_encode(src, src_len, str) == 0);
279
require(needed_length == strlen(str) + 1);
282
dst= (char *) malloc(base64_needed_decoded_length(strlen(str)));
284
dst_len= base64_decode(str, strlen(str), dst, NULL);
285
require(dst_len == src_len);
287
if (memcmp(src, dst, src_len) != 0)
289
printf(" --------- src --------- --------- dst ---------\n");
290
for (k= 0; k<src_len; k+=8)
292
printf("%.4x ", (uint32_t) k);
293
for (l=0; l<8 && k+l<src_len; l++)
295
unsigned char c= src[k+l];
296
printf("%.2x ", (unsigned)c);
301
for (l=0; l<8 && k+l<dst_len; l++)
303
unsigned char c= dst[k+l];
304
printf("%.2x ", (unsigned)c);
308
printf("src length: %.8x, dst length: %.8x\n",
309
(uint32_t) src_len, (uint32_t) dst_len);
313
printf("Test succeeded.\n");