Remove the RFC 1319 MD2 Message-Digest Algorithm routines from libmd.

1. The licensing terms for the MD2 routines from RFC is not under a BSD-like
   license.  Instead it is only granted for non-commercial Internet
   Privacy-Enhanced Mail.
2. MD2 is quite deprecated as it is no longer considered a cryptographically
   strong algorithm.

Discussed with:	so (cperciva), core

1 files changed, 0 insertions, 211 deletions

diff --git a/lib/libmd/md2c.c b/lib/libmd/md2c.c
deleted file mode 100644
index 4799457..0000000
--- a/lib/libmd/md2c.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/* MD2C.C - RSA Data Security, Inc., MD2 message-digest algorithm
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All
-   rights reserved.
-
-   License to copy and use this software is granted for
-   non-commercial Internet Privacy-Enhanced Mail provided that it is
-   identified as the "RSA Data Security, Inc. MD2 Message Digest
-   Algorithm" in all material mentioning or referencing this software
-   or this function.
-
-   RSA Data Security, Inc. makes no representations concerning either
-   the merchantability of this software or the suitability of this
-   software for any particular purpose. It is provided "as is"
-   without express or implied warranty of any kind.
-
-   These notices must be retained in any copies of any part of this
-   documentation and/or software.
- */
-
-#include <sys/types.h>
-#include <string.h>
-#include "md2.h"
-
-
-typedef unsigned char *POINTER;
-typedef u_int16_t UINT2;
-typedef u_int32_t UINT4;
-
-#define PROTO_LIST(list) list
-
-static void MD2Transform PROTO_LIST
-  ((unsigned char [16], unsigned char [16], const unsigned char [16]));
-
-/* Permutation of 0..255 constructed from the digits of pi. It gives a
-   "random" nonlinear byte substitution operation.
- */
-static unsigned char PI_SUBST[256] = {
-  41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
-  19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
-  76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
-  138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
-  245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
-  148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
-  39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
-  181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
-  150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
-  112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
-  96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
-  85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
-  234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
-  129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
-  8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
-  203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
-  166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
-  31, 26, 219, 153, 141, 51, 159, 17, 131, 20
-};
-
-static unsigned char *PADDING[] = {
-  (unsigned char *)"",
-  (unsigned char *)"\001",
-  (unsigned char *)"\002\002",
-  (unsigned char *)"\003\003\003",
-  (unsigned char *)"\004\004\004\004",
-  (unsigned char *)"\005\005\005\005\005",
-  (unsigned char *)"\006\006\006\006\006\006",
-  (unsigned char *)"\007\007\007\007\007\007\007",
-  (unsigned char *)"\010\010\010\010\010\010\010\010",
-  (unsigned char *)"\011\011\011\011\011\011\011\011\011",
-  (unsigned char *)"\012\012\012\012\012\012\012\012\012\012",
-  (unsigned char *)"\013\013\013\013\013\013\013\013\013\013\013",
-  (unsigned char *)"\014\014\014\014\014\014\014\014\014\014\014\014",
-  (unsigned char *)
-    "\015\015\015\015\015\015\015\015\015\015\015\015\015",
-  (unsigned char *)
-    "\016\016\016\016\016\016\016\016\016\016\016\016\016\016",
-  (unsigned char *)
-    "\017\017\017\017\017\017\017\017\017\017\017\017\017\017\017",
-  (unsigned char *)
-    "\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020"
-};
-
-/* MD2 initialization. Begins an MD2 operation, writing a new context.
- */
-void MD2Init (context)
-MD2_CTX *context;                                        /* context */
-{
-  context->count = 0;
-  memset ((POINTER)context->state, 0, sizeof (context->state));
-  memset
-    ((POINTER)context->checksum, 0, sizeof (context->checksum));
-}
-
-/* MD2 block update operation. Continues an MD2 message-digest
-     operation, processing another message block, and updating the
-     context.
- */
-void MD2Update (context, in, inputLen)
-MD2_CTX *context;                                        /* context */
-const void *in;                                /* input block */
-unsigned int inputLen;                     /* length of input block */
-{
-  unsigned int i, idx, partLen;
-  const unsigned char *input = in;
-
-  /* Update number of bytes mod 16 */
-  idx = context->count;
-  context->count = (idx + inputLen) & 0xf;
-
-  partLen = 16 - idx;
-
-  /* Transform as many times as possible.
-    */
-  if (inputLen >= partLen) {
-    memcpy
-      ((POINTER)&context->buffer[idx], (POINTER)input, partLen);
-    MD2Transform (context->state, context->checksum, context->buffer);
-
-    for (i = partLen; i + 15 < inputLen; i += 16)
-      MD2Transform (context->state, context->checksum, &input[i]);
-
-    idx = 0;
-  }
-  else
-    i = 0;
-
-  /* Buffer remaining input */
-  memcpy
-    ((POINTER)&context->buffer[idx], (POINTER)&input[i],
-     inputLen-i);
-}
-
-/* MD2 padding.
- */
-void MD2Pad (context)
-MD2_CTX *context;                                        /* context */
-{
-  unsigned int idx, padLen;
-
-  /* Pad out to multiple of 16.
-   */
-  idx = context->count;
-  padLen = 16 - idx;
-  MD2Update (context, PADDING[padLen], padLen);
-
-  /* Extend with checksum */
-  MD2Update (context, context->checksum, 16);
-}
-
-/* MD2 finalization. Ends an MD2 message-digest operation, writing the
-     message digest and zeroizing the context.
- */
-void MD2Final (digest, context)
-unsigned char digest[16];                         /* message digest */
-MD2_CTX *context;                                        /* context */
-{
-  /* Do padding */
-  MD2Pad (context);
-
-  /* Store state in digest */
-  memcpy ((POINTER)digest, (POINTER)context->state, 16);
-
-  /* Zeroize sensitive information.
-   */
-  memset ((POINTER)context, 0, sizeof (*context));
-}
-
-/* MD2 basic transformation. Transforms state and updates checksum
-     based on block.
- */
-static void MD2Transform (state, checksum, block)
-unsigned char state[16];
-unsigned char checksum[16];
-const unsigned char block[16];
-{
-  unsigned int i, j, t;
-  unsigned char x[48];
-
-  /* Form encryption block from state, block, state ^ block.
-   */
-  memcpy ((POINTER)x, (POINTER)state, 16);
-  memcpy ((POINTER)x+16, (POINTER)block, 16);
-  for (i = 0; i < 16; i++)
-    x[i+32] = state[i] ^ block[i];
-
-  /* Encrypt block (18 rounds).
-   */
-  t = 0;
-  for (i = 0; i < 18; i++) {
-    for (j = 0; j < 48; j++)
-      t = x[j] ^= PI_SUBST[t];
-    t = (t + i) & 0xff;
-  }
-
-  /* Save new state */
-  memcpy ((POINTER)state, (POINTER)x, 16);
-
-  /* Update checksum.
-   */
-  t = checksum[15];
-  for (i = 0; i < 16; i++)
-    t = checksum[i] ^= PI_SUBST[block[i] ^ t];
-
-  /* Zeroize sensitive information.
-   */
-  memset ((POINTER)x, 0, sizeof (x));
-}