Deleted file, contents moved to base64-encode.c or

base64-decode.c.

Rev: src/nettle/base64.c:1.6(DEAD)

base64.c

-/* base64.c
- *
- * Base64 "ASCII armor" codec.
- */
-
-/* nettle, low-level cryptographics library
- *
- * Copyright (C) 2002 Niels Mller, Dan Egnor
- *  
- * The nettle library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at your
- * option) any later version.
- * 
- * The nettle library 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 Lesser General Public
- * License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public License
- * along with the nettle library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#include "base64.h"
-
-#include <assert.h>
-#include <stdlib.h>
-
-#define TABLE_INVALID -1
-#define TABLE_SPACE -2
-#define TABLE_END -3
-
-static const uint8_t encode_table[64] =
-  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-  "abcdefghijklmnopqrstuvwxyz"
-  "0123456789+/";
-
-static const signed char decode_table[256] =
-{
-  -1, -1, -1, -1, -1, -1, -1, -1, -1, -2, -2, -1, -1, -2, -1, -1, 
-  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-  -2, -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, -3, -1, -1,
-  -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,
-  -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, -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, -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,
-};
-
-#define ENCODE(x) (encode_table[0x3F & (x)])
-
-void
-base64_encode_group(uint8_t *dst, uint32_t group)
-{
-  *dst++ = ENCODE(group >> 18);
-  *dst++ = ENCODE(group >> 12);
-  *dst++ = ENCODE(group >> 6);
-  *dst++ = ENCODE(group);
-}
-
-unsigned 
-base64_encode(uint8_t *dst,
-              unsigned src_length,
-              const uint8_t *src)
-{
-  unsigned dst_length = BASE64_ENCODE_LENGTH(src_length);
-  const uint8_t *in = src + src_length;
-  uint8_t *out = dst + dst_length;
-  unsigned left_over = src_length % 3;
-
-  if (left_over)
-    {
-      in -= left_over;
-      *--out = '=';
-      switch(left_over)
-	{
-	case 1:
-	  *--out = '=';
-	  *--out = ENCODE(in[0] << 4);
-	  break;
-	  
-	case 2:
-	  *--out = ENCODE( in[1] << 2);
-	  *--out = ENCODE((in[0] << 4) | (in[1] >> 4));
-	  break;
-
-	default:
-	  abort();
-	}
-      *--out = ENCODE(in[0] >> 2);
-    }
-  
-  while (in > src)
-    {
-      in -= 3;
-      *--out = ENCODE( in[2]);
-      *--out = ENCODE((in[1] << 2) | (in[2] >> 6));
-      *--out = ENCODE((in[0] << 4) | (in[1] >> 4));
-      *--out = ENCODE( in[0] >> 2);
-    }
-
-  assert(out == dst);
-
-  return dst_length;
-}
-
-void
-base64_decode_init(struct base64_ctx *ctx)
-{
-  ctx->shift = 10;
-  ctx->accum = 0;
-}
-
-unsigned
-base64_decode_update(struct base64_ctx *ctx,
-                     uint8_t *dst,
-                     unsigned src_length,
-                     const uint8_t *src)
-{
-  uint8_t *out = dst;
-
-  for (;;) 
-    {
-      int data;
-      if (src_length == 0) return out - dst;
-      data = decode_table[*src];
-      switch (data)
-        {
-        default:
-          ctx->accum |= data << ctx->shift;
-          ctx->shift -= 6;
-          if (ctx->shift <= 2)
-            {
-              *out++ = ctx->accum >> 8;
-              ctx->accum <<= 8;
-              ctx->shift += 8;
-            }
-	  /* Fall through */
-        case TABLE_INVALID:
-        case TABLE_SPACE:
-        case TABLE_END:
-	  /* FIXME: Silently ignores any invalid characters.
-	   * We need to detect and return errors, in some way. */
-          ++src;
-          --src_length;
-        }
-    }
-}