2.4.22

 crypto

diff -urN linux-2.4.21/crypto/md5.c linux-2.4.22/crypto/md5.c
--- linux-2.4.21/crypto/md5.c   1969-12-31 16:00:00.000000000 -0800
+++ linux-2.4.22/crypto/md5.c   2003-08-25 04:44:40.000000000 -0700
@@ -0,0 +1,244 @@
+/* 
+ * Cryptographic API.
+ *
+ * MD5 Message Digest Algorithm (RFC1321).
+ *
+ * Derived from cryptoapi implementation, originally based on the
+ * public domain implementation written by Colin Plumb in 1993.
+ *
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/crypto.h>
+#include <asm/byteorder.h>
+
+#define MD5_DIGEST_SIZE      16
+#define MD5_HMAC_BLOCK_SIZE   64
+#define MD5_BLOCK_WORDS      16
+#define MD5_HASH_WORDS      4
+
+#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))
+
+#define MD5STEP(f, w, x, y, z, in, s) \
+   (w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
+
+struct md5_ctx {
+   u32 hash[MD5_HASH_WORDS];
+   u32 block[MD5_BLOCK_WORDS];
+   u64 byte_count;
+};
+
+static void md5_transform(u32 *hash, u32 const *in)
+{
+   u32 a, b, c, d;
+
+   a = hash[0];
+   b = hash[1];
+   c = hash[2];
+   d = hash[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);
+
+   hash[0] += a;
+   hash[1] += b;
+   hash[2] += c;
+   hash[3] += d;
+}
+
+/* XXX: this stuff can be optimized */
+static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
+{
+   while (words--) {
+      __le32_to_cpus(buf);
+      buf++;
+   }
+}
+
+static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
+{
+   while (words--) {
+      __cpu_to_le32s(buf);
+      buf++;
+   }
+}
+
+static inline void md5_transform_helper(struct md5_ctx *ctx)
+{
+   le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32));
+   md5_transform(ctx->hash, ctx->block);
+}
+
+static void md5_init(void *ctx)
+{
+   struct md5_ctx *mctx = ctx;
+
+   mctx->hash[0] = 0x67452301;
+   mctx->hash[1] = 0xefcdab89;
+   mctx->hash[2] = 0x98badcfe;
+   mctx->hash[3] = 0x10325476;
+   mctx->byte_count = 0;
+}
+
+static void md5_update(void *ctx, const u8 *data, unsigned int len)
+{
+   struct md5_ctx *mctx = ctx;
+   const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
+
+   mctx->byte_count += len;
+
+   if (avail > len) {
+      memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+             data, len);
+      return;
+   }
+
+   memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+          data, avail);
+
+   md5_transform_helper(mctx);
+   data += avail;
+   len -= avail;
+
+   while (len >= sizeof(mctx->block)) {
+      memcpy(mctx->block, data, sizeof(mctx->block));
+      md5_transform_helper(mctx);
+      data += sizeof(mctx->block);
+      len -= sizeof(mctx->block);
+   }
+
+   memcpy(mctx->block, data, len);
+}
+
+static void md5_final(void *ctx, u8 *out)
+{
+   struct md5_ctx *mctx = ctx;
+   const unsigned int offset = mctx->byte_count & 0x3f;
+   char *p = (char *)mctx->block + offset;
+   int padding = 56 - (offset + 1);
+
+   *p++ = 0x80;
+   if (padding < 0) {
+      memset(p, 0x00, padding + sizeof (u64));
+      md5_transform_helper(mctx);
+      p = (char *)mctx->block;
+      padding = 56;
+   }
+
+   memset(p, 0, padding);
+   mctx->block[14] = mctx->byte_count << 3;
+   mctx->block[15] = mctx->byte_count >> 29;
+   le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
+                     sizeof(u64)) / sizeof(u32));
+   md5_transform(mctx->hash, mctx->block);
+   cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
+   memcpy(out, mctx->hash, sizeof(mctx->hash));
+   memset(mctx, 0, sizeof(*mctx));
+}
+
+static struct crypto_alg alg = {
+   .cra_name   =   "md5",
+   .cra_flags   =   CRYPTO_ALG_TYPE_DIGEST,
+   .cra_blocksize   =   MD5_HMAC_BLOCK_SIZE,
+   .cra_ctxsize   =   sizeof(struct md5_ctx),
+   .cra_module   =   THIS_MODULE,
+   .cra_list   =   LIST_HEAD_INIT(alg.cra_list),
+   .cra_u      =   { .digest = {
+   .dia_digestsize   =   MD5_DIGEST_SIZE,
+   .dia_init      =    md5_init,
+   .dia_update    =   md5_update,
+   .dia_final     =   md5_final } }
+};
+
+static int __init init(void)
+{
+   return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+   crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MD5 Message Digest Algorithm");