base64 implementation from madmutt--.

[apps/madmutt.git] / base64.c

diff --git a/base64.c b/base64.c
deleted file mode 100644 (file)
index 9fdf037..0000000
--- a/base64.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- *     This program is free software; you can redistribute it
- *     and/or modify it under the terms of the GNU General Public
- *     License as published by the Free Software Foundation; either
- *     version 2 of the License, or (at your option) any later
- *     version.
- * 
- *     This program is distributed in the hope that it will be
- *     useful, but WITHOUT ANY WARRANTY; without even the implied
- *     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- *     PURPOSE.  See the GNU General Public License for more
- *     details.
- * 
- *     You should have received a copy of the GNU General Public
- *     License along with this program; if not, write to the Free
- *     Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- *     Boston, MA 02110-1301, USA.
- * 
- */
-
-/* 
- * Base64 handling elsewhere in mutt should be modified to call
- * these routines. These routines were written because IMAP's
- * AUTHENTICATE protocol required them, and base64 handling
- * elsewhere wasn't sufficiently generic.
- * 
- */
-
-/* 
- * This code is heavily modified from fetchmail (also GPL'd, of
- * course) by Brendan Cully <brendan@kublai.com>.
- * 
- * Original copyright notice:
- * 
- * The code in the fetchmail distribution is Copyright 1997 by Eric
- * S. Raymond.  Portions are also copyrighted by Carl Harris, 1993
- * and 1995.  Copyright retained for the purpose of protecting free
- * redistribution of source. 
- * 
- */
-
-#include <lib-lib/lib-lib.h>
-#include <lib-mime/mime.h>
-
-#include "mutt.h"
-
-/* raw bytes to null-terminated base 64 string */
-void mutt_to_base64 (unsigned char *out, const unsigned char *in, ssize_t len,
-                     ssize_t olen)
-{
-  while (len >= 3 && olen > 10) {
-    *out++ = __m_b64chars[in[0] >> 2];
-    *out++ = __m_b64chars[((in[0] << 4) & 0x30) | (in[1] >> 4)];
-    *out++ = __m_b64chars[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
-    *out++ = __m_b64chars[in[2] & 0x3f];
-    olen -= 4;
-    len -= 3;
-    in += 3;
-  }
-
-  /* clean up remainder */
-  if (len > 0 && olen > 4) {
-    unsigned char fragment;
-
-    *out++ = __m_b64chars[in[0] >> 2];
-    fragment = (in[0] << 4) & 0x30;
-    if (len > 1)
-      fragment |= in[1] >> 4;
-    *out++ = __m_b64chars[fragment];
-    *out++ = (len < 2) ? '=' : __m_b64chars[(in[1] << 2) & 0x3c];
-    *out++ = '=';
-  }
-  *out = '\0';
-}
-
-/* Convert '\0'-terminated base 64 string to raw bytes.
- * Returns length of returned buffer, or -1 on error */
-int mutt_from_base64 (char *out, const char *in)
-{
-  int len = 0;
-  register unsigned char digit1, digit2, digit3, digit4;
-
-  do {
-    digit1 = in[0];
-    if (base64val(digit1) < 0)
-      return -1;
-    digit2 = in[1];
-    if (base64val(digit2) < 0)
-      return -1;
-    digit3 = in[2];
-    if (digit3 != '=' && base64val(digit3) < 0)
-      return -1;
-    digit4 = in[3];
-    if (digit4 != '=' && base64val(digit4) < 0)
-      return -1;
-    in += 4;
-
-    /* digits are already sanity-checked */
-    *out++ = (base64val(digit1) << 2) | (base64val(digit2) >> 4);
-    len++;
-    if (digit3 != '=') {
-      *out++ = ((base64val(digit2) << 4) & 0xf0) | (base64val(digit3) >> 2);
-      len++;
-      if (digit4 != '=') {
-        *out++ = ((base64val(digit3) << 6) & 0xc0) | base64val(digit4);
-        len++;
-      }
-    }
-  } while (*in && digit4 != '=');
-
-  return len;
-}