1 files changed, 210 insertions, 0 deletions
diff --git a/lib/libmd/md2c.c b/lib/libmd/md2c.c
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@@ -0,0 +1,210 @@
+/* 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, input, inputLen)
+MD2_CTX *context;                                        /* context */
+const unsigned char *input;                                /* input block */
+unsigned int inputLen;                     /* length of input block */
+{
+  unsigned int i, index, partLen;
+
+  /* Update number of bytes mod 16 */
+  index = context->count;
+  context->count = (index + inputLen) & 0xf;
+
+  partLen = 16 - index;
+
+  /* Transform as many times as possible.
+    */
+  if (inputLen >= partLen) {
+    memcpy
+      ((POINTER)&context->buffer[index], (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]);
+
+    index = 0;
+  }
+  else
+    i = 0;
+
+  /* Buffer remaining input */
+  memcpy
+    ((POINTER)&context->buffer[index], (POINTER)&input[i],
+     inputLen-i);
+}
+
+/* MD2 padding.
+ */
+void MD2Pad (context)
+MD2_CTX *context;                                        /* context */
+{
+  unsigned int index, padLen;
+
+  /* Pad out to multiple of 16.
+   */
+  index = context->count;
+  padLen = 16 - index;
+  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));
+}