1 files changed, 637 insertions, 0 deletions

diff --git a/libsylph/md5.c b/libsylph/md5.c
new file mode 100644
index 0000000..a047471
--- /dev/null
+++ b/libsylph/md5.c
@@ -0,0 +1,637 @@
+/*
+
+  GNet API added by David Helder <dhelder@umich.edu> 2000-6-11.  All
+  additions and changes placed in the public domain.
+
+  Files originally from: http://www.gxsnmp.org/CVS/gxsnmp/
+
+  Modified the prefix of functions to prevent conflict with original GNet.
+
+ */
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest.  This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+#include "md5.h"
+#include <glib.h>
+#include <string.h>
+
+
+/* ************************************************************ */
+/* Code below is from Colin Plumb implementation                */
+
+
+
+struct MD5Context {
+        guint32 buf[4];
+        guint32 bits[2];
+        guchar  in[64];
+        int     doByteReverse;
+};
+
+static void MD5Init(struct MD5Context *context);
+static void MD5Update(struct MD5Context *context, guchar const *buf,
+                      guint len);
+static void MD5Final(guchar digest[16], struct MD5Context *context);
+static void MD5Transform(guint32 buf[4], guint32 const in[16]);
+
+/*
+ * This is needed to make RSAREF happy on some MS-DOS compilers.
+ */
+typedef struct MD5Context MD5_CTX;
+
+
+
+
+static void byteReverse(guint8 *buf, guint longs);
+
+/*
+ * Note: this code is harmless on little-endian machines.
+ */
+void 
+byteReverse(guint8 *buf, guint longs)
+{
+  guint32 t;
+  do 
+    {
+      t = (guint32) ((guint) buf[3] << 8 | buf[2]) << 16 |
+          ((guint) buf[1] << 8 | buf[0]);
+      *(guint32 *) buf = t;
+      buf += 4;
+    } 
+  while (--longs);
+}
+
+/*
+ * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void 
+MD5Init(struct MD5Context *ctx)
+{
+  ctx->buf[0] = 0x67452301;
+  ctx->buf[1] = 0xefcdab89;
+  ctx->buf[2] = 0x98badcfe;
+  ctx->buf[3] = 0x10325476;
+
+  ctx->bits[0] = 0;
+  ctx->bits[1] = 0;
+
+#if (G_BYTE_ORDER == G_BIG_ENDIAN)
+  ctx->doByteReverse = 1;
+#else
+  ctx->doByteReverse = 0;
+#endif
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+void 
+MD5Update(struct MD5Context *ctx, guint8 const *buf, guint len)
+{
+  guint32 t;
+
+  /* Update bitcount */
+
+  t = ctx->bits[0];
+  if ((ctx->bits[0] = t + ((guint32) len << 3)) < t)
+    ctx->bits[1]++;             /* Carry from low to high */
+  ctx->bits[1] += len >> 29;
+
+  t = (t >> 3) & 0x3f;  /* Bytes already in shsInfo->data */
+
+  /* Handle any leading odd-sized chunks */
+
+  if (t) 
+    {
+      guint8 *p = (guint8 *) ctx->in + t;
+
+      t = 64 - t;
+      if (len < t) 
+        {
+          g_memmove(p, buf, len);
+          return;
+        }
+      g_memmove(p, buf, t);
+      if (ctx->doByteReverse)
+        byteReverse(ctx->in, 16);
+      MD5Transform(ctx->buf, (guint32 *) ctx->in);
+      buf += t;
+      len -= t;
+    }
+  /* Process data in 64-byte chunks */
+
+  while (len >= 64) 
+    {
+      g_memmove(ctx->in, buf, 64);
+      if (ctx->doByteReverse)
+        byteReverse(ctx->in, 16);
+      MD5Transform(ctx->buf, (guint32 *) ctx->in);
+      buf += 64;
+      len -= 64;
+    }
+
+  /* Handle any remaining bytes of data. */
+
+  g_memmove(ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern 
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void 
+MD5Final(guint8 digest[16], struct MD5Context *ctx)
+{
+  guint count;
+  guint8 *p;
+
+  /* Compute number of bytes mod 64 */
+  count = (ctx->bits[0] >> 3) & 0x3F;
+
+  /* Set the first char of padding to 0x80.  This is safe since there is
+     always at least one byte free */
+  p = ctx->in + count;
+  *p++ = 0x80;
+
+  /* Bytes of padding needed to make 64 bytes */
+  count = 64 - 1 - count;
+
+  /* Pad out to 56 mod 64 */
+  if (count < 8) 
+    {
+        /* Two lots of padding:  Pad the first block to 64 bytes */
+      memset(p, 0, count);
+      if (ctx->doByteReverse)
+        byteReverse(ctx->in, 16);
+      MD5Transform(ctx->buf, (guint32 *) ctx->in);
+
+      /* Now fill the next block with 56 bytes */
+      memset(ctx->in, 0, 56);
+    } 
+  else 
+    {
+      /* Pad block to 56 bytes */
+      memset(p, 0, count - 8);
+    }
+  if (ctx->doByteReverse)
+    byteReverse(ctx->in, 14);
+
+  /* Append length in bits and transform */
+  ((guint32 *) ctx->in)[14] = ctx->bits[0];
+  ((guint32 *) ctx->in)[15] = ctx->bits[1];
+
+  MD5Transform(ctx->buf, (guint32 *) ctx->in);
+  if (ctx->doByteReverse)
+    byteReverse((guint8 *) ctx->buf, 4);
+  g_memmove(digest, ctx->buf, 16);
+  memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
+}
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+        ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data.  MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+void 
+MD5Transform(guint32 buf[4], guint32 const in[16])
+{
+  register guint32 a, b, c, d;
+
+  a = buf[0];
+  b = buf[1];
+  c = buf[2];
+  d = buf[3];
+
+  MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+  MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+  MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+  MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+  MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+  MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+  MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+  MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+  MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+  MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+  MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+  MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+  MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+  MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+  MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+  MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+  MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+  MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+  MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+  MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+  MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+  MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+  MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+  MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+  MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+  MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+  MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+  MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+  MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+  MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+  MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+  MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+  MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+  MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+  MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+  MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+  MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+  MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+  MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+  MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}
+
+
+
+/* ************************************************************ */
+/* Code below is David Helder's API for GNet                    */
+
+struct _SMD5
+{
+  struct MD5Context     ctx;
+  gchar                 digest[S_GNET_MD5_HASH_LENGTH];
+};
+
+
+/**
+ *  s_gnet_md5_new:
+ *  @buffer: buffer to hash
+ *  @length: length of @buffer
+ * 
+ *  Creates a #SMD5 from @buffer.
+ *
+ *  Returns: a new #SMD5.
+ *
+ **/
+SMD5*           
+s_gnet_md5_new (const guchar* buffer, guint length)
+{
+  SMD5* md5;
+
+  md5 = g_new0 (SMD5, 1);
+  MD5Init (&md5->ctx);
+  MD5Update (&md5->ctx, buffer, length);
+  MD5Final ((gpointer) &md5->digest, &md5->ctx);
+
+  return md5;
+}
+
+
+
+/**
+ *  s_gnet_md5_new_string:
+ *  @str: hexidecimal string
+ * 
+ *  Creates a #SMD5 from @str.  @str is a hexidecimal string
+ *  representing the digest.
+ *
+ *  Returns: a new #SMD5.
+ *
+ **/
+SMD5*           
+s_gnet_md5_new_string (const gchar* str)
+{
+  SMD5* md5;
+  guint i;
+
+  g_return_val_if_fail (str, NULL);
+  g_return_val_if_fail (strlen(str) >= (S_GNET_MD5_HASH_LENGTH * 2), NULL);
+
+  md5 = g_new0 (SMD5, 1);
+
+  for (i = 0; i < (S_GNET_MD5_HASH_LENGTH * 2); ++i)
+    {
+      guint val = 0;
+
+      switch (str[i])
+        {
+        case '0':       val = 0;        break;
+        case '1':       val = 1;        break;
+        case '2':       val = 2;        break;
+        case '3':       val = 3;        break;
+        case '4':       val = 4;        break;
+        case '5':       val = 5;        break;
+        case '6':       val = 6;        break;
+        case '7':       val = 7;        break;
+        case '8':       val = 8;        break;
+        case '9':       val = 9;        break;
+        case 'A':
+        case 'a':       val = 10;       break;
+        case 'B':
+        case 'b':       val = 11;       break;
+        case 'C':
+        case 'c':       val = 12;       break;
+        case 'D':
+        case 'd':       val = 13;       break;
+        case 'E':
+        case 'e':       val = 14;       break;
+        case 'F':
+        case 'f':       val = 15;       break;
+        default:
+          g_return_val_if_fail (FALSE, NULL);
+        }
+
+      if (i % 2)
+        md5->digest[i / 2] |= val;
+      else
+        md5->digest[i / 2] = val << 4;
+    }
+
+  return md5;
+}
+
+
+
+/**
+ *  s_gnet_md5_clone
+ *  @md5: a #SMD5
+ * 
+ *  Copies a #SMD5.
+ *
+ *  Returns: a copy of @md5.
+ *
+ **/
+SMD5*           
+s_gnet_md5_clone (const SMD5* md5)
+{
+  SMD5* md52;
+
+  g_return_val_if_fail (md5, NULL);
+
+  md52      = g_new0 (SMD5, 1);
+  md52->ctx = md5->ctx;
+  memcpy (md52->digest, md5->digest, sizeof(md5->digest));
+
+  return md52;
+}
+
+
+
+/** 
+ *  s_gnet_md5_delete
+ *  @md5: a #SMD5
+ *
+ *  Deletes a #SMD5.
+ *
+ **/
+void
+s_gnet_md5_delete (SMD5* md5)
+{
+  if (md5)
+    g_free (md5);
+}
+
+
+
+/**
+ *  s_gnet_md5_new_incremental
+ *
+ *  Creates a #SMD5 incrementally.  After creating a #SMD5, call
+ *  s_gnet_md5_update() one or more times to hash data.  Finally, call
+ *  s_gnet_md5_final() to compute the final hash value.
+ *
+ *  Returns: a new #SMD5.
+ *
+ **/
+SMD5*           
+s_gnet_md5_new_incremental (void)
+{
+  SMD5* md5;
+
+  md5 = g_new0 (SMD5, 1);
+  MD5Init (&md5->ctx);
+  return md5;
+}
+
+
+/**
+ *  s_gnet_md5_update
+ *  @md5: a #SMD5
+ *  @buffer: buffer to add
+ *  @length: length of @buffer
+ *
+ *  Updates the hash with @buffer.  This may be called several times
+ *  on a hash created by s_gnet_md5_new_incremental() before being
+ *  finalized by calling s_gnet_md5_final().
+ * 
+ **/
+void
+s_gnet_md5_update (SMD5* md5, const guchar* buffer, guint length)
+{
+  g_return_if_fail (md5);
+
+  MD5Update (&md5->ctx, buffer, length);
+}
+
+
+/**
+ *  s_gnet_md5_final
+ *  @md5: a #SMD5
+ *
+ *  Calcuates the final hash value of a #SMD5.  This should only be
+ *  called on an #SMD5 created by s_gnet_md5_new_incremental().
+ *
+ **/
+void
+s_gnet_md5_final (SMD5* md5)
+{
+  g_return_if_fail (md5);
+
+  MD5Final ((gpointer) &md5->digest, &md5->ctx);
+}
+
+
+/* **************************************** */
+
+/**
+ *  s_gnet_md5_equal
+ *  @p1: first #SMD5.
+ *  @p2: second #SMD5.
+ *
+ *  Compares two #SMD5's for equality.
+ *
+ *  Returns: TRUE if they are equal; FALSE otherwise.
+ *
+ **/
+gint
+s_gnet_md5_equal (gconstpointer p1, gconstpointer p2)
+{
+  SMD5* md5a = (SMD5*) p1;
+  SMD5* md5b = (SMD5*) p2;
+  guint i;
+
+  for (i = 0; i < S_GNET_MD5_HASH_LENGTH; ++i)
+    if (md5a->digest[i] != md5b->digest[i])
+      return FALSE;
+
+  return TRUE;
+}
+
+
+/**
+ *  s_gnet_md5_hash
+ *  @p: a #SMD5
+ *
+ *  Creates a hash code for a #SMD5 for use with GHashTable.  This
+ *  hash value is not the same as the MD5 digest.
+ *
+ *  Returns: the hash code for @p.
+ *
+ **/
+guint
+s_gnet_md5_hash (gconstpointer p)
+{
+  const SMD5* md5 = (const SMD5*) p;
+  const guint* q;
+
+  g_return_val_if_fail (md5, 0);
+
+  q = (const guint*) md5->digest;
+
+  return (q[0] ^ q[1] ^ q[2] ^ q[3]);
+}
+
+
+/**
+ *  s_gnet_md5_get_digest
+ *  @md5: a #SMD5
+ *
+ *  Gets the raw MD5 digest.
+ *
+ *  Returns: a callee-owned buffer containing the MD5 hash digest.
+ *  The buffer is %S_GNET_MD5_HASH_LENGTH bytes long.
+ *
+ **/
+gchar*          
+s_gnet_md5_get_digest (const SMD5* md5)
+{
+  g_return_val_if_fail (md5, NULL);
+  
+  return (gchar*) md5->digest;
+}
+
+
+static gchar bits2hex[16] = { '0', '1', '2', '3', 
+                              '4', '5', '6', '7',
+                              '8', '9', 'a', 'b',
+                              'c', 'd', 'e', 'f' };
+
+/**
+ *  s_gnet_md5_get_string
+ *  @md5: a #SMD5
+ *
+ *  Gets the digest represented a human-readable string.
+ *
+ *  Returns: a hexadecimal string representing the digest.  The string
+ *  is 2 * %S_GNET_MD5_HASH_LENGTH bytes long and NULL terminated.  The
+ *  string is caller owned.
+ *
+ **/
+gchar*          
+s_gnet_md5_get_string (const SMD5* md5)
+{
+  gchar* str;
+  guint i;
+
+  g_return_val_if_fail (md5, NULL);
+
+  str = g_new (gchar, S_GNET_MD5_HASH_LENGTH * 2 + 1);
+  str[S_GNET_MD5_HASH_LENGTH * 2] = '\0';
+
+  for (i = 0; i < S_GNET_MD5_HASH_LENGTH; ++i)
+    {
+      str[i * 2]       = bits2hex[(md5->digest[i] & 0xF0) >> 4];
+      str[(i * 2) + 1] = bits2hex[(md5->digest[i] & 0x0F)     ];
+    }
+
+  return str;
+}
+
+
+
+/**
+ * s_gnet_md5_copy_string
+ * @md5: a #SMD5
+ * @buffer: buffer at least 2 * %S_GNET_MD5_HASH_LENGTH bytes long
+ *
+ * Copies the digest, represented as a string, into @buffer.  The
+ * string is not NULL terminated.
+ * 
+ **/
+void
+s_gnet_md5_copy_string (const SMD5* md5, gchar* buffer)
+{
+  guint i;
+
+  g_return_if_fail (md5);
+  g_return_if_fail (buffer);
+
+  for (i = 0; i < S_GNET_MD5_HASH_LENGTH; ++i)
+    {
+      buffer[i * 2]       = bits2hex[(md5->digest[i] & 0xF0) >> 4];
+      buffer[(i * 2) + 1] = bits2hex[(md5->digest[i] & 0x0F)     ];
+    }
+}