--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sha1-asm-ltc.c	Sun Oct 06 21:49:15 2013 +0800
@@ -0,0 +1,175 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, [email protected], http://libtomcrypt.com
+ */
+#include "tomcrypt.h"
+
+/**
+  @file sha1.c
+  SHA1 code by Tom St Denis 
+*/
+
+
+#ifdef DROPBEAR_SHA1_ASM
+
+const struct ltc_hash_descriptor sha1_asm_desc =
+{
+    "sha1_asm",
+    102,
+    20,
+    64,
+
+    /* OID */
+   { 1, 3, 14, 3, 2, 26,  },
+   6,
+
+    &sha1_init,
+    &sha1_process,
+    &sha1_done,
+    &sha1_test,
+    NULL
+};
+
+/**
+   Initialize the hash state
+   @param md   The hash state you wish to initialize
+   @return CRYPT_OK if successful
+*/
+int sha1_init(hash_state * md)
+{
+   LTC_ARGCHK(md != NULL);
+   md->sha1.state[0] = 0x67452301UL;
+   md->sha1.state[1] = 0xefcdab89UL;
+   md->sha1.state[2] = 0x98badcfeUL;
+   md->sha1.state[3] = 0x10325476UL;
+   md->sha1.state[4] = 0xc3d2e1f0UL;
+   md->sha1.curlen = 0;
+   md->sha1.length = 0;
+   return CRYPT_OK;
+}
+
+void sha1_block_data_order(void* state_vars, const unsigned char *buf, size_t num);
+
+static int sha1_asm_compress(hash_state *md, unsigned char *buf)
+{
+	sha1_block_data_order(&md->sha1.state, buf, 1);
+	return CRYPT_OK;
+}
+
+/**
+   Process a block of memory though the hash
+   @param md     The hash state
+   @param in     The data to hash
+   @param inlen  The length of the data (octets)
+   @return CRYPT_OK if successful
+*/
+HASH_PROCESS(sha1_process, sha1_asm_compress, sha1, 64)
+
+/**
+   Terminate the hash to get the digest
+   @param md  The hash state
+   @param out [out] The destination of the hash (20 bytes)
+   @return CRYPT_OK if successful
+*/
+int sha1_done(hash_state * md, unsigned char *out)
+{
+    int i;
+
+    LTC_ARGCHK(md  != NULL);
+    LTC_ARGCHK(out != NULL);
+
+    if (md->sha1.curlen >= sizeof(md->sha1.buf)) {
+       return CRYPT_INVALID_ARG;
+    }
+
+    /* increase the length of the message */
+    md->sha1.length += md->sha1.curlen * 8;
+
+    /* append the '1' bit */
+    md->sha1.buf[md->sha1.curlen++] = (unsigned char)0x80;
+
+    /* if the length is currently above 56 bytes we append zeros
+     * then compress.  Then we can fall back to padding zeros and length
+     * encoding like normal.
+     */
+    if (md->sha1.curlen > 56) {
+        while (md->sha1.curlen < 64) {
+            md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
+        }
+        sha1_asm_compress(md, md->sha1.buf);
+        md->sha1.curlen = 0;
+    }
+
+    /* pad upto 56 bytes of zeroes */
+    while (md->sha1.curlen < 56) {
+        md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
+    }
+
+    /* store length */
+    STORE64H(md->sha1.length, md->sha1.buf+56);
+    sha1_asm_compress(md, md->sha1.buf);
+
+    /* copy output */
+    for (i = 0; i < 5; i++) {
+        STORE32H(md->sha1.state[i], out+(4*i));
+    }
+#ifdef LTC_CLEAN_STACK
+    zeromem(md, sizeof(hash_state));
+#endif
+    return CRYPT_OK;
+}
+
+/**
+  Self-test the hash
+  @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
+*/  
+int  sha1_test(void)
+{
+ #ifndef LTC_TEST
+    return CRYPT_NOP;
+ #else    
+  static const struct {
+      char *msg;
+      unsigned char hash[20];
+  } tests[] = {
+    { "abc",
+      { 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a,
+        0xba, 0x3e, 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c,
+        0x9c, 0xd0, 0xd8, 0x9d }
+    },
+    { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+      { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E,
+        0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5,
+        0xE5, 0x46, 0x70, 0xF1 }
+    }
+  };
+
+  int i;
+  unsigned char tmp[20];
+  hash_state md;
+
+  for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0]));  i++) {
+      sha1_init(&md);
+      sha1_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
+      sha1_done(&md, tmp);
+      if (XMEMCMP(tmp, tests[i].hash, 20) != 0) {
+         return CRYPT_FAIL_TESTVECTOR;
+      }
+  }
+  return CRYPT_OK;
+  #endif
+}
+
+#endif
+
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha1.c,v $ */
+/* $Revision: 1.8 $ */
+/* $Date: 2006/11/01 09:28:17 $ */