--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/hashes/sha2/sha224.c	Sat Feb 03 08:20:34 2007 +0000
@@ -0,0 +1,125 @@
+/* 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
+ */
+/**
+   @param sha224.c
+   SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits (Tom St Denis)
+*/
+
+const struct ltc_hash_descriptor sha224_desc =
+{
+    "sha224",
+    10,
+    28,
+    64,
+
+    /* OID */
+   { 2, 16, 840, 1, 101, 3, 4, 2, 4,  },
+   9,
+
+    &sha224_init,
+    &sha256_process,
+    &sha224_done,
+    &sha224_test,
+    NULL
+};
+
+/* init the sha256 er... sha224 state ;-) */
+/**
+   Initialize the hash state
+   @param md   The hash state you wish to initialize
+   @return CRYPT_OK if successful
+*/
+int sha224_init(hash_state * md)
+{
+    LTC_ARGCHK(md != NULL);
+
+    md->sha256.curlen = 0;
+    md->sha256.length = 0;
+    md->sha256.state[0] = 0xc1059ed8UL;
+    md->sha256.state[1] = 0x367cd507UL;
+    md->sha256.state[2] = 0x3070dd17UL;
+    md->sha256.state[3] = 0xf70e5939UL;
+    md->sha256.state[4] = 0xffc00b31UL;
+    md->sha256.state[5] = 0x68581511UL;
+    md->sha256.state[6] = 0x64f98fa7UL;
+    md->sha256.state[7] = 0xbefa4fa4UL;
+    return CRYPT_OK;
+}
+
+/**
+   Terminate the hash to get the digest
+   @param md  The hash state
+   @param out [out] The destination of the hash (28 bytes)
+   @return CRYPT_OK if successful
+*/
+int sha224_done(hash_state * md, unsigned char *out)
+{
+    unsigned char buf[32];
+    int err;
+
+    LTC_ARGCHK(md  != NULL);
+    LTC_ARGCHK(out != NULL);
+
+    err = sha256_done(md, buf);
+    XMEMCPY(out, buf, 28);
+#ifdef LTC_CLEAN_STACK
+    zeromem(buf, sizeof(buf));
+#endif 
+    return err;
+}
+
+/**
+  Self-test the hash
+  @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
+*/  
+int  sha224_test(void)
+{
+ #ifndef LTC_TEST
+    return CRYPT_NOP;
+ #else    
+  static const struct {
+      char *msg;
+      unsigned char hash[28];
+  } tests[] = {
+    { "abc",
+      { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8,
+        0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2,
+        0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd,
+        0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 }
+    },
+    { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+      { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76,
+        0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89,
+        0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4,
+        0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 }
+    },
+  };
+
+  int i;
+  unsigned char tmp[28];
+  hash_state md;
+
+  for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
+      sha224_init(&md);
+      sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
+      sha224_done(&md, tmp);
+      if (XMEMCMP(tmp, tests[i].hash, 28) != 0) {
+         return CRYPT_FAIL_TESTVECTOR;
+      }
+  }
+  return CRYPT_OK;
+ #endif
+}
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha2/sha224.c,v $ */
+/* $Revision: 1.8 $ */
+/* $Date: 2006/11/01 09:28:17 $ */