New files, hacked by Dan

Egnor.

Rev: src/nettle/base64-meta.c:1.1
Rev: src/nettle/base64.c:1.1
Rev: src/nettle/base64.h:1.1

diff --git a/base64-meta.c b/base64-meta.c
new file mode 100644 (file)
index 0000000..89081ba
--- /dev/null
+++ b/base64-meta.c
@@ -0,0 +1,28 @@
+/* base64-meta.c */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002 Niels Möller
+ *  
+ * 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 "nettle-meta.h"
+
+#include "base64.h"
+
+const struct nettle_armor nettle_base64
+= _NETTLE_ARMOR(base64, BASE64);

diff --git a/base64.c b/base64.c
new file mode 100644 (file)
index 0000000..3e6609e
--- /dev/null
+++ b/base64.c
@@ -0,0 +1,131 @@
+/* base64.c
+ *
+ * Base64 "ASCII armor" codec.
+ */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002 Niels Möller, 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>
+
+#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,
+};
+
+unsigned 
+base64_encode(uint8_t *dst,
+              unsigned src_length,
+              const uint8_t *src)
+{
+  uint8_t *out = dst;
+
+  while (src_length >= 3)
+    {
+      *out++ = encode_table[0x3F &  (src[0] >> 2)];
+      *out++ = encode_table[0x3F & ((src[0] << 4) | (src[1] >> 4))];
+      *out++ = encode_table[0x3F & ((src[1] << 2) | (src[2] >> 6))];
+      *out++ = encode_table[0x3F &   src[2]];
+      src += 3;
+      src_length -= 3;
+    }
+
+  switch (src_length) 
+    {
+    case 2:
+      *out++ = encode_table[0x3F &  (src[0] >> 2)];
+      *out++ = encode_table[0x3F & ((src[0] << 4) | (src[1] >> 4))];
+      *out++ = encode_table[0x3F &  (src[1] << 2)];
+      *out++ = '=';
+      break;
+    case 1:
+      *out++ = encode_table[0x3F & (src[0] >> 2)];
+      *out++ = encode_table[0x3F & (src[0] << 4)];
+      *out++ = '=';
+      *out++ = '=';
+      break;
+    case 0:
+      break;
+    }
+
+  return out - dst;
+}
+
+unsigned
+base64_decode(uint8_t *dst,
+              unsigned src_length,
+              const uint8_t *src)
+{
+  uint8_t *out = dst;
+  uint32_t accum = 0;
+  int shift = 10;
+
+  while (src_length > 0)
+    {
+      const int data = decode_table[*src];
+      switch (data)
+        {
+        default:
+          accum |= data << shift;
+          shift -= 6;
+          if (shift <= 2)
+            {
+              *out++ = accum >> 8;
+              accum = accum << 8;
+              shift += 8;
+            }
+        case TABLE_INVALID:
+        case TABLE_SPACE:
+        case TABLE_END:
+          break;
+        }
+
+        ++src;
+        --src_length;
+    }
+
+  return out - dst;
+}

diff --git a/base64.h b/base64.h
new file mode 100644 (file)
index 0000000..27888b8
--- /dev/null
+++ b/base64.h
@@ -0,0 +1,46 @@
+/* armor.h
+ *
+ * "ASCII armor" codecs.
+ */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2001 Niels Möller
+ *  
+ * 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.
+ */
+ 
+#ifndef NETTLE_ARMOR_H_INCLUDED
+#define NETTLE_ARMOR_H_INCLUDED
+
+#include <inttypes.h>
+
+/* Base64 encoding */
+
+#define BASE64_ASCII_BLOCK_SIZE 4
+#define BASE64_RAW_BLOCK_SIZE   3
+
+unsigned /* Returns the length of encoded data */
+base64_encode(uint8_t *dst,
+              unsigned src_length,
+              const uint8_t *src);
+
+unsigned /* Returns the length of decoded data */
+base64_decode(uint8_t *dst,
+              unsigned src_length,
+              const uint8_t *src);
+
+#endif /* NETTLE_ARMOR_H_INCLUDED */