tests/test-base64.c

   1 /* Self tests for base64.
   2    Copyright (C) 2004, 2008-2025 Free Software Foundation, Inc.
   3    Written by Simon Josefsson.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation, either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 #include "base64.h"
  21
  22 #include <stddef.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <stdint.h>
  26
  27 #include "macros.h"
  28
  29 int
  30 main (void)
  31 {
  32   const char *in = "abcdefghijklmnop";
  33   const char *b64in = "YWJjZGVmZw==";
  34   char out[255];
  35   idx_t len;
  36   bool ok;
  37   char *p;
  38
  39   memset (out, 0x42, sizeof (out));
  40   base64_encode (in, 0, out, 0);
  41   ASSERT (out[0] == '\x42');
  42
  43   memset (out, 0x42, sizeof (out));
  44   base64_encode (in, 1, out, 1);
  45   ASSERT (memcmp (out, "YQ==", 1) == 0);
  46
  47   memset (out, 0x42, sizeof (out));
  48   base64_encode (in, 1, out, 2);
  49   ASSERT (memcmp (out, "YQ==", 2) == 0);
  50
  51   memset (out, 0x42, sizeof (out));
  52   base64_encode (in, 1, out, 3);
  53   ASSERT (memcmp (out, "YQ==", 3) == 0);
  54
  55   memset (out, 0x42, sizeof (out));
  56   base64_encode (in, 1, out, 4);
  57   ASSERT (memcmp (out, "YQ==", 4) == 0);
  58
  59   memset (out, 0x42, sizeof (out));
  60   base64_encode (in, 1, out, 8);
  61   ASSERT (memcmp (out, "YQ==", 4) == 0);
  62
  63   memset (out, 0x42, sizeof (out));
  64   base64_encode (in, 2, out, 4);
  65   ASSERT (memcmp (out, "YWI=", 4) == 0);
  66
  67   memset (out, 0x42, sizeof (out));
  68   base64_encode (in, 3, out, 4);
  69   ASSERT (memcmp (out, "YWJj", 4) == 0);
  70
  71   memset (out, 0x42, sizeof (out));
  72   base64_encode (in, 4, out, 5);
  73   ASSERT (memcmp (out, "YWJjZA==", 5) == 0);
  74
  75   memset (out, 0x42, sizeof (out));
  76   base64_encode (in, 4, out, 100);
  77   ASSERT (memcmp (out, "YWJjZA==", 6) == 0);
  78
  79   /* Decode. */
  80
  81   memset (out, 0x42, sizeof (out));
  82   len = 0;
  83   ok = base64_decode (b64in, 4, out, &len);
  84   ASSERT (ok);
  85   ASSERT (len == 0);
  86
  87   memset (out, 0x42, sizeof (out));
  88   len = 1;
  89   ok = base64_decode (b64in, 4, out, &len);
  90   ASSERT (ok);
  91   ASSERT (len == 1);
  92   ASSERT (memcmp (out, "abcdefg", 1) == 0);
  93
  94   memset (out, 0x42, sizeof (out));
  95   len = 2;
  96   ok = base64_decode (b64in, 4, out, &len);
  97   ASSERT (ok);
  98   ASSERT (len == 2);
  99   ASSERT (memcmp (out, "abcdefg", 2) == 0);
 100
 101   memset (out, 0x42, sizeof (out));
 102   len = 3;
 103   ok = base64_decode (b64in, 4, out, &len);
 104   ASSERT (ok);
 105   ASSERT (len == 3);
 106   ASSERT (memcmp (out, "abcdefg", 3) == 0);
 107
 108   memset (out, 0x42, sizeof (out));
 109   len = 4;
 110   ok = base64_decode (b64in, 4, out, &len);
 111   ASSERT (ok);
 112   ASSERT (len == 3);
 113   ASSERT (memcmp (out, "abcdefg", 3) == 0);
 114
 115   memset (out, 0x42, sizeof (out));
 116   len = 100;
 117   ok = base64_decode (b64in, strlen (b64in), out, &len);
 118   ASSERT (ok);
 119   ASSERT (len == 7);
 120   ASSERT (memcmp (out, "abcdefg", 7) == 0);
 121
 122   /* Allocating encode */
 123
 124   len = base64_encode_alloc (in, strlen (in), &p);
 125   ASSERT (len == 24);
 126   ASSERT (strcmp (p, "YWJjZGVmZ2hpamtsbW5vcA==") == 0);
 127   free (p);
 128
 129   len = base64_encode_alloc (in, IDX_MAX - 5, &p);
 130   ASSERT (len == 0);
 131
 132   /* Decode context function */
 133   {
 134     struct base64_decode_context ctx;
 135
 136     base64_decode_ctx_init (&ctx);
 137
 138     len = sizeof (out);
 139     ok = base64_decode_ctx (&ctx, b64in, strlen (b64in), out, &len);
 140     ASSERT (ok);
 141     ASSERT (len == 7);
 142     ASSERT (memcmp (out, "abcdefg", len) == 0);
 143   }
 144
 145   /* Allocating decode context function */
 146
 147   ok = base64_decode_alloc_ctx (NULL, b64in, strlen (b64in), &p, &len);
 148   ASSERT (ok);
 149   ASSERT (len == 7);
 150   ASSERT (memcmp (out, "abcdefg", len) == 0);
 151   free (p);
 152
 153   {
 154     struct base64_decode_context ctx;
 155     const char *newlineb64 = "YWJjZG\nVmZ2hp\namtsbW5vcA==";
 156
 157     base64_decode_ctx_init (&ctx);
 158
 159     ok = base64_decode_alloc_ctx (&ctx, newlineb64, strlen (newlineb64), &p, &len);
 160     ASSERT (ok);
 161     ASSERT (len == strlen (in));
 162     ASSERT (memcmp (p, in, len) == 0);
 163     free (p);
 164   }
 165
 166   {
 167     struct base64_decode_context ctx;
 168     base64_decode_ctx_init (&ctx);
 169
 170     ok = base64_decode_alloc_ctx (&ctx, "YW\nJjZGVmZ2hp", 13, &p, &len);
 171     ASSERT (ok);
 172     ASSERT (len == 9);
 173     ASSERT (memcmp (p, "abcdefghi", len) == 0);
 174     free (p);
 175
 176     base64_decode_ctx_init (&ctx);
 177
 178     ok = base64_decode_alloc_ctx (&ctx, "YW\n", 3, &p, &len);
 179     ASSERT (ok);
 180     ASSERT (len == 0);
 181     free (p);
 182
 183     ok = base64_decode_alloc_ctx (&ctx, "JjZGVmZ2", 8, &p, &len);
 184     ASSERT (ok);
 185     ASSERT (len == 6);
 186     ASSERT (memcmp (p, "abcdef", len) == 0);
 187     free (p);
 188
 189     ok = base64_decode_alloc_ctx (&ctx, "hp", 2, &p, &len);
 190     ASSERT (ok);
 191     ASSERT (len == 3);
 192     ASSERT (memcmp (p, "ghi", len) == 0);
 193     free (p);
 194
 195     ok = base64_decode_alloc_ctx (&ctx, "", 0, &p, &len);
 196     ASSERT (ok);
 197     free (p);
 198   }
 199
 200   {
 201     struct base64_decode_context ctx;
 202     const char *newlineb64 = "\n\n\n\n\n";
 203
 204     base64_decode_ctx_init (&ctx);
 205
 206     ok = base64_decode_alloc_ctx (&ctx, newlineb64, strlen (newlineb64), &p, &len);
 207     ASSERT (ok);
 208     ASSERT (len == 0);
 209     free (p);
 210   }
 211
 212   ok = base64_decode_alloc_ctx (NULL, " ! ", 3, &p, &len);
 213   ASSERT (!ok);
 214
 215   ok = base64_decode_alloc_ctx (NULL, "abc\ndef", 7, &p, &len);
 216   ASSERT (!ok);
 217
 218   ok = base64_decode_alloc_ctx (NULL, "aa", 2, &p, &len);
 219   ASSERT (!ok);
 220
 221   ok = base64_decode_alloc_ctx (NULL, "aa=", 3, &p, &len);
 222   ASSERT (!ok);
 223
 224   ok = base64_decode_alloc_ctx (NULL, "aax", 3, &p, &len);
 225   ASSERT (!ok);
 226
 227   ok = base64_decode_alloc_ctx (NULL, "aa=X", 4, &p, &len);
 228   ASSERT (!ok);
 229
 230   ok = base64_decode_alloc_ctx (NULL, "aa=X", 4, &p, &len);
 231   ASSERT (!ok);
 232
 233   ok = base64_decode_alloc_ctx (NULL, "aax=X", 5, &p, &len);
 234   ASSERT (!ok);
 235
 236   ok = base64_decode_alloc_ctx (NULL, "SGVsbG9=", 8, &p, &len);
 237   ASSERT (!ok);
 238
 239   ok = base64_decode_alloc_ctx (NULL, "TR==", 4, &p, &len);
 240   ASSERT (!ok);
 241
 242   ok = base64_decode_alloc_ctx (NULL, "TWF=TWE=", 8, &p, &len);
 243   ASSERT (!ok);
 244
 245   return test_exit_status;
 246 }