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-rw-r--r--fs/ext3/hash.c206
1 files changed, 0 insertions, 206 deletions
diff --git a/fs/ext3/hash.c b/fs/ext3/hash.c
deleted file mode 100644
index ede315c..0000000
--- a/fs/ext3/hash.c
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
- * linux/fs/ext3/hash.c
- *
- * Copyright (C) 2002 by Theodore Ts'o
- *
- * This file is released under the GPL v2.
- *
- * This file may be redistributed under the terms of the GNU Public
- * License.
- */
-
-#include "ext3.h"
-#include <linux/cryptohash.h>
-
-#define DELTA 0x9E3779B9
-
-static void TEA_transform(__u32 buf[4], __u32 const in[])
-{
- __u32 sum = 0;
- __u32 b0 = buf[0], b1 = buf[1];
- __u32 a = in[0], b = in[1], c = in[2], d = in[3];
- int n = 16;
-
- do {
- sum += DELTA;
- b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);
- b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);
- } while(--n);
-
- buf[0] += b0;
- buf[1] += b1;
-}
-
-
-/* The old legacy hash */
-static __u32 dx_hack_hash_unsigned(const char *name, int len)
-{
- __u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
- const unsigned char *ucp = (const unsigned char *) name;
-
- while (len--) {
- hash = hash1 + (hash0 ^ (((int) *ucp++) * 7152373));
-
- if (hash & 0x80000000)
- hash -= 0x7fffffff;
- hash1 = hash0;
- hash0 = hash;
- }
- return hash0 << 1;
-}
-
-static __u32 dx_hack_hash_signed(const char *name, int len)
-{
- __u32 hash, hash0 = 0x12a3fe2d, hash1 = 0x37abe8f9;
- const signed char *scp = (const signed char *) name;
-
- while (len--) {
- hash = hash1 + (hash0 ^ (((int) *scp++) * 7152373));
-
- if (hash & 0x80000000)
- hash -= 0x7fffffff;
- hash1 = hash0;
- hash0 = hash;
- }
- return hash0 << 1;
-}
-
-static void str2hashbuf_signed(const char *msg, int len, __u32 *buf, int num)
-{
- __u32 pad, val;
- int i;
- const signed char *scp = (const signed char *) msg;
-
- pad = (__u32)len | ((__u32)len << 8);
- pad |= pad << 16;
-
- val = pad;
- if (len > num*4)
- len = num * 4;
- for (i = 0; i < len; i++) {
- if ((i % 4) == 0)
- val = pad;
- val = ((int) scp[i]) + (val << 8);
- if ((i % 4) == 3) {
- *buf++ = val;
- val = pad;
- num--;
- }
- }
- if (--num >= 0)
- *buf++ = val;
- while (--num >= 0)
- *buf++ = pad;
-}
-
-static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
-{
- __u32 pad, val;
- int i;
- const unsigned char *ucp = (const unsigned char *) msg;
-
- pad = (__u32)len | ((__u32)len << 8);
- pad |= pad << 16;
-
- val = pad;
- if (len > num*4)
- len = num * 4;
- for (i=0; i < len; i++) {
- if ((i % 4) == 0)
- val = pad;
- val = ((int) ucp[i]) + (val << 8);
- if ((i % 4) == 3) {
- *buf++ = val;
- val = pad;
- num--;
- }
- }
- if (--num >= 0)
- *buf++ = val;
- while (--num >= 0)
- *buf++ = pad;
-}
-
-/*
- * Returns the hash of a filename. If len is 0 and name is NULL, then
- * this function can be used to test whether or not a hash version is
- * supported.
- *
- * The seed is an 4 longword (32 bits) "secret" which can be used to
- * uniquify a hash. If the seed is all zero's, then some default seed
- * may be used.
- *
- * A particular hash version specifies whether or not the seed is
- * represented, and whether or not the returned hash is 32 bits or 64
- * bits. 32 bit hashes will return 0 for the minor hash.
- */
-int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
-{
- __u32 hash;
- __u32 minor_hash = 0;
- const char *p;
- int i;
- __u32 in[8], buf[4];
- void (*str2hashbuf)(const char *, int, __u32 *, int) =
- str2hashbuf_signed;
-
- /* Initialize the default seed for the hash checksum functions */
- buf[0] = 0x67452301;
- buf[1] = 0xefcdab89;
- buf[2] = 0x98badcfe;
- buf[3] = 0x10325476;
-
- /* Check to see if the seed is all zero's */
- if (hinfo->seed) {
- for (i=0; i < 4; i++) {
- if (hinfo->seed[i])
- break;
- }
- if (i < 4)
- memcpy(buf, hinfo->seed, sizeof(buf));
- }
-
- switch (hinfo->hash_version) {
- case DX_HASH_LEGACY_UNSIGNED:
- hash = dx_hack_hash_unsigned(name, len);
- break;
- case DX_HASH_LEGACY:
- hash = dx_hack_hash_signed(name, len);
- break;
- case DX_HASH_HALF_MD4_UNSIGNED:
- str2hashbuf = str2hashbuf_unsigned;
- case DX_HASH_HALF_MD4:
- p = name;
- while (len > 0) {
- (*str2hashbuf)(p, len, in, 8);
- half_md4_transform(buf, in);
- len -= 32;
- p += 32;
- }
- minor_hash = buf[2];
- hash = buf[1];
- break;
- case DX_HASH_TEA_UNSIGNED:
- str2hashbuf = str2hashbuf_unsigned;
- case DX_HASH_TEA:
- p = name;
- while (len > 0) {
- (*str2hashbuf)(p, len, in, 4);
- TEA_transform(buf, in);
- len -= 16;
- p += 16;
- }
- hash = buf[0];
- minor_hash = buf[1];
- break;
- default:
- hinfo->hash = 0;
- return -1;
- }
- hash = hash & ~1;
- if (hash == (EXT3_HTREE_EOF_32BIT << 1))
- hash = (EXT3_HTREE_EOF_32BIT - 1) << 1;
- hinfo->hash = hash;
- hinfo->minor_hash = minor_hash;
- return 0;
-}
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