--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/libpurple/ciphers/md4hash.c Sun Jun 16 03:46:10 2013 +0530
@@ -0,0 +1,317 @@
+/*
+ * Original md4 taken from linux kernel
+ * MD4 Message Digest Algorithm (RFC1320).
+ *
+ * Implementation derived from Andrew Tridgell and Steve French's
+ * CIFS MD4 implementation, and the cryptoapi implementation
+ * originally based on the public domain implementation written
+ * by Colin Plumb in 1993.
+ *
+ * Copyright (c) Andrew Tridgell 1997-1998.
+ * Modified by Steve French (sfrench@us.ibm.com) 2002
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ */
+#include "md4hash.h"
+
+#include <string.h>
+
+#define MD4_DIGEST_SIZE 16
+#define MD4_BLOCK_WORDS 16
+#define MD4_HASH_WORDS 4
+
+#define PURPLE_MD4_HASH_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE((obj), PURPLE_TYPE_MD4_HASH, PurpleMD4HashPrivate))
+
+/******************************************************************************
+ * Structs
+ *****************************************************************************/
+typedef struct {
+ guint32 hash[MD4_HASH_WORDS];
+ guint32 block[MD4_BLOCK_WORDS];
+ guint64 byte_count;
+} PurpleMD4HashPrivate;
+
+/******************************************************************************
+ * Globals
+ *****************************************************************************/
+static GObjectClass *parent_class = NULL;
+
+/******************************************************************************
+ * Helpers
+ *****************************************************************************/
+#define ROUND1(a,b,c,d,k,s) \
+ (a = lshift(a + F(b,c,d) + k, s))
+
+#define ROUND2(a,b,c,d,k,s) \
+ (a = lshift(a + G(b,c,d) + k + (guint32)0x5a827999,s))
+
+#define ROUND3(a,b,c,d,k,s) \
+ (a = lshift(a + H(b,c,d) + k + (guint32)0x6ed9eba1,s))
+
+static inline guint32
+lshift(guint32 x, unsigned int s) {
+ x &= 0xffffffff;
+ return (((x << s) & 0xffffffff) | (x >> (32 - s)));
+}
+
+static inline guint32
+F(guint32 x, guint32 y, guint32 z) {
+ return ((x & y) | ((~x) & z));
+}
+
+static inline guint32
+G(guint32 x, guint32 y, guint32 z) {
+ return ((x & y) | (x & z) | (y & z));
+}
+
+static inline guint32
+H(guint32 x, guint32 y, guint32 z) {
+ return (x ^ y ^ z);
+}
+
+static inline void
+le32_to_cpu_array(guint32 *buf, unsigned int words) {
+ while(words--) {
+ *buf = GUINT_FROM_LE(*buf);
+ buf++;
+ }
+}
+
+static inline void
+cpu_to_le32_array(guint32 *buf, unsigned int words) {
+ while(words--) {
+ *buf = GUINT_TO_LE(*buf);
+ buf++;
+ }
+}
+
+static void
+md4_transform(guint32 *hash, guint32 const *in) {
+ guint32 a, b, c, d;
+
+ a = hash[0];
+ b = hash[1];
+ c = hash[2];
+ d = hash[3];
+
+ ROUND1(a, b, c, d, in[0], 3);
+ ROUND1(d, a, b, c, in[1], 7);
+ ROUND1(c, d, a, b, in[2], 11);
+ ROUND1(b, c, d, a, in[3], 19);
+ ROUND1(a, b, c, d, in[4], 3);
+ ROUND1(d, a, b, c, in[5], 7);
+ ROUND1(c, d, a, b, in[6], 11);
+ ROUND1(b, c, d, a, in[7], 19);
+ ROUND1(a, b, c, d, in[8], 3);
+ ROUND1(d, a, b, c, in[9], 7);
+ ROUND1(c, d, a, b, in[10], 11);
+ ROUND1(b, c, d, a, in[11], 19);
+ ROUND1(a, b, c, d, in[12], 3);
+ ROUND1(d, a, b, c, in[13], 7);
+ ROUND1(c, d, a, b, in[14], 11);
+ ROUND1(b, c, d, a, in[15], 19);
+
+ ROUND2(a, b, c, d,in[ 0], 3);
+ ROUND2(d, a, b, c, in[4], 5);
+ ROUND2(c, d, a, b, in[8], 9);
+ ROUND2(b, c, d, a, in[12], 13);
+ ROUND2(a, b, c, d, in[1], 3);
+ ROUND2(d, a, b, c, in[5], 5);
+ ROUND2(c, d, a, b, in[9], 9);
+ ROUND2(b, c, d, a, in[13], 13);
+ ROUND2(a, b, c, d, in[2], 3);
+ ROUND2(d, a, b, c, in[6], 5);
+ ROUND2(c, d, a, b, in[10], 9);
+ ROUND2(b, c, d, a, in[14], 13);
+ ROUND2(a, b, c, d, in[3], 3);
+ ROUND2(d, a, b, c, in[7], 5);
+ ROUND2(c, d, a, b, in[11], 9);
+ ROUND2(b, c, d, a, in[15], 13);
+
+ ROUND3(a, b, c, d,in[ 0], 3);
+ ROUND3(d, a, b, c, in[8], 9);
+ ROUND3(c, d, a, b, in[4], 11);
+ ROUND3(b, c, d, a, in[12], 15);
+ ROUND3(a, b, c, d, in[2], 3);
+ ROUND3(d, a, b, c, in[10], 9);
+ ROUND3(c, d, a, b, in[6], 11);
+ ROUND3(b, c, d, a, in[14], 15);
+ ROUND3(a, b, c, d, in[1], 3);
+ ROUND3(d, a, b, c, in[9], 9);
+ ROUND3(c, d, a, b, in[5], 11);
+ ROUND3(b, c, d, a, in[13], 15);
+ ROUND3(a, b, c, d, in[3], 3);
+ ROUND3(d, a, b, c, in[11], 9);
+ ROUND3(c, d, a, b, in[7], 11);
+ ROUND3(b, c, d, a, in[15], 15);
+
+ hash[0] += a;
+ hash[1] += b;
+ hash[2] += c;
+ hash[3] += d;
+}
+
+static inline void
+md4_transform_helper(PurpleHash *hash) {
+ PurpleMD4HashPrivate *priv = PURPLE_MD4_HASH_GET_PRIVATE(hash);
+
+ le32_to_cpu_array(priv->block, sizeof(priv->block) / sizeof(guint32));
+ md4_transform(priv->hash, priv->block);
+}
+
+/******************************************************************************
+ * Hash Stuff
+ *****************************************************************************/
+static void
+purple_md4_hash_reset(PurpleHash *hash) {
+ PurpleMD4HashPrivate *priv = PURPLE_MD4_HASH_GET_PRIVATE(hash);
+
+ priv->hash[0] = 0x67452301;
+ priv->hash[1] = 0xefcdab89;
+ priv->hash[2] = 0x98badcfe;
+ priv->hash[3] = 0x10325476;
+
+ priv->byte_count = 0;
+
+ memset(priv->block, 0, sizeof(priv->block));
+}
+
+static void
+purple_md4_hash_append(PurpleHash *hash, const guchar *data, size_t len) {
+ PurpleMD4HashPrivate *priv = PURPLE_MD4_HASH_GET_PRIVATE(hash);
+ const guint32 avail = sizeof(priv->block) - (priv->byte_count & 0x3f);
+
+ priv->byte_count += len;
+
+ if(avail > len) {
+ memcpy((char *)priv->block +
+ (sizeof(priv->block) - avail),
+ data, len);
+ return;
+ }
+
+ memcpy((char *)priv->block +
+ (sizeof(priv->block) - avail),
+ data, avail);
+
+ md4_transform_helper(hash);
+ data += avail;
+ len -= avail;
+
+ while(len >= sizeof(priv->block)) {
+ memcpy(priv->block, data, sizeof(priv->block));
+ md4_transform_helper(hash);
+ data += sizeof(priv->block);
+ len -= sizeof(priv->block);
+ }
+
+ memcpy(priv->block, data, len);
+}
+
+static gboolean
+purple_md4_hash_digest(PurpleHash *hash, guchar *out, size_t len)
+{
+ PurpleMD4HashPrivate *priv = PURPLE_MD4_HASH_GET_PRIVATE(hash);
+ const unsigned int offset = priv->byte_count & 0x3f;
+ gchar *p = (gchar *)priv->block + offset;
+ gint padding = 56 - (offset + 1);
+
+ if(len < 16)
+ return FALSE;
+
+ *p++ = 0x80;
+
+ if(padding < 0) {
+ memset(p, 0x00, padding + sizeof(guint64));
+ md4_transform_helper(hash);
+ p = (gchar *)priv->block;
+ padding = 56;
+ }
+
+ memset(p, 0, padding);
+ priv->block[14] = priv->byte_count << 3;
+ priv->block[15] = priv->byte_count >> 29;
+ le32_to_cpu_array(priv->block,
+ (sizeof(priv->block) - sizeof(guint64)) /
+ sizeof(guint32));
+ md4_transform(priv->hash, priv->block);
+ cpu_to_le32_array(priv->hash, sizeof(priv->hash) / sizeof(guint32));
+ memcpy(out, priv->hash, sizeof(priv->hash));
+
+ return TRUE;
+}
+
+static size_t
+purple_md4_hash_get_digest_size(PurpleHash *hash)
+{
+ return 16;
+}
+
+static size_t
+purple_md4_hash_get_block_size(PurpleHash *hash)
+{
+ /* This does not change (in this case) */
+ return 64;
+}
+
+static const gchar*
+purple_md4_hash_get_name(PurpleHash *hash)
+{
+ return "md4";
+}
+
+/******************************************************************************
+ * Object Stuff
+ *****************************************************************************/
+static void
+purple_md4_hash_class_init(PurpleMD4HashClass *klass) {
+ PurpleHashClass *hash_class = PURPLE_HASH_CLASS(klass);
+
+ parent_class = g_type_class_peek_parent(klass);
+
+ g_type_class_add_private(klass, sizeof(PurpleMD4HashPrivate));
+
+ hash_class->reset = purple_md4_hash_reset;
+ hash_class->reset_state = purple_md4_hash_reset;
+ hash_class->append = purple_md4_hash_append;
+ hash_class->digest = purple_md4_hash_digest;
+ hash_class->get_digest_size = purple_md4_hash_get_digest_size;
+ hash_class->get_block_size = purple_md4_hash_get_block_size;
+ hash_class->get_name = purple_md4_hash_get_name;
+}
+
+/******************************************************************************
+ * API
+ *****************************************************************************/
+GType
+purple_md4_hash_get_gtype(void) {
+ static GType type = 0;
+
+ if(type == 0) {
+ static const GTypeInfo info = {
+ sizeof(PurpleMD4HashClass),
+ NULL,
+ NULL,
+ (GClassInitFunc)purple_md4_hash_class_init,
+ NULL,
+ NULL,
+ sizeof(PurpleMD4Hash),
+ 0,
+ (GInstanceInitFunc)purple_hash_reset,
+ NULL,
+ };
+
+ type = g_type_register_static(PURPLE_TYPE_HASH,
+ "PurpleMD4Hash",
+ &info, 0);
+ }
+
+ return type;
+}
+
+PurpleHash *
+purple_md4_hash_new(void) {
+ return g_object_new(PURPLE_TYPE_MD4_HASH, NULL);
+}