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base64.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1999-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * base64encode()/base64decode() tester
 */

#include <ast.h>

main()
{
      register int      i;
      int         testno;
      int         errors;
      ssize_t           l;
      ssize_t           r;
      ssize_t           t;
      unsigned char     dat[256];
      unsigned char     tst[sizeof(dat)];
      char        buf[1024];
      unsigned char     pat[16];

      static char en[] = "YWJjZGVmZ2hpams=";
      static char de[] = "abcdefghijk";

      testno = errors = 0;
      sfprintf(sfstdout, "TEST      base64\n");
      for (i = 0; i < sizeof(dat); i++)
            dat[i] = i;
      for (i = 0; i < sizeof(dat) - 1; i++)
      {
            testno++;
            if (i > 0)
            {
                  l = base64encode(dat, i, NiL, buf, sizeof(buf), NiL);
                  if (l < 0 || l > sizeof(buf))
                  {
                        errors++;
                        sfprintf(sfstdout, "test %02d left buffer encode size %ld failed\n", testno, l);
                        continue;
                  }
                  t = base64decode(buf, l, NiL, tst, sizeof(tst), NiL);
                  if (t != i)
                  {
                        errors++;
                        sfprintf(sfstdout, "test %02d left buffer decode size %ld failed\n", testno, t);
                        continue;
                  }
                  if (memcmp(dat, tst, i))
                  {
                        errors++;
                        sfprintf(sfstdout, "test %02d left buffer decode failed\n", testno);
                        continue;
                  }
            }
            else
                  l = 0;
            r = base64encode(dat + i, sizeof(dat) - i, NiL, buf + l, sizeof(buf) - l, NiL);
            if (r < 0 || r > sizeof(buf) - l)
            {
                  errors++;
                  sfprintf(sfstdout, "test %02d right buffer encode size %ld failed\n", testno, r);
                  continue;
            }
            t = base64decode(buf + l, r, NiL, tst, sizeof(tst), NiL);
            if (t != (sizeof(dat) - i))
            {
                  errors++;
                  sfprintf(sfstdout, "test %02d total buffer decode size %ld failed\n", testno, t);
                  continue;
            }
            if (memcmp(dat + i, tst, sizeof(dat) - i))
            {
                  errors++;
                  sfprintf(sfstdout, "test %02d right buffer decode failed\n", testno);
                  continue;
            }
            t = base64decode(buf, l + r, NiL, tst, sizeof(tst), NiL);
            if (t != sizeof(dat))
            {
                  errors++;
                  sfprintf(sfstdout, "test %02d total buffer decode size %ld failed\n", testno, t);
                  continue;
            }
            if (memcmp(dat, tst, sizeof(dat)))
            {
                  errors++;
                  sfprintf(sfstdout, "test %02d total buffer decode failed\n", testno);
                  continue;
            }
      }
      for (r = 0; r <= sizeof(pat); r++)
      {
            testno++;
            memset(tst, '*', sizeof(pat));
            tst[sizeof(pat)-1] = 0;
            t = base64decode(en, sizeof(en)-1, NiL, tst, r, NiL);
            if (t != (sizeof(de)-1))
            {
                  sfprintf(sfstdout, "decode size %r failed, %r expected\n", t, sizeof(de)-1);
                  errors++;
            }
            else
            {
                  memset(pat, '*', sizeof(pat));
                  pat[sizeof(pat)-1] = 0;
                  memcpy(pat, de, r >= sizeof(de) ? sizeof(de) : r);
                  if (memcmp(tst, pat, sizeof(pat)))
                  {
                        sfprintf(sfstdout, "decode failed, \"%s\" != \"%s\"\n", tst, pat);
                        errors++;
                  }
            }
      }
      sfprintf(sfstdout, "TEST      base64, %d test%s", testno, testno == 1 ? "" : "s");
      sfprintf(sfstdout, ", %d error%s\n", errors, errors == 1 ? "" : "s");
      return 0;
}

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