propagate from branch 'au.asn.ucc.matt.dropbear' (head 0501e6f661b5415eb76f3b312d183c3adfbfb712)

            to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 01038174ec27245b51bd43a66c01ad930880f67b)

--HG--
branch : agent-client
extra : convert_revision : 12b2f59db65e7339d340e95ac67d6d9ddb193c2b

1 files changed, 136 insertions, 0 deletions

diff --git a/libtomcrypt/src/prngs/sprng.c b/libtomcrypt/src/prngs/sprng.c
new file mode 100644
index 0000000..4e657da
--- /dev/null
+++ b/libtomcrypt/src/prngs/sprng.c
@@ -0,0 +1,136 @@
+/* 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, tomstdenis@gmail.com, http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+
+/**
+   @file sprng.c
+   Secure PRNG, Tom St Denis
+*/
+   
+/* A secure PRNG using the RNG functions.  Basically this is a
+ * wrapper that allows you to use a secure RNG as a PRNG
+ * in the various other functions.
+ */
+
+#ifdef SPRNG
+
+const struct ltc_prng_descriptor sprng_desc =
+{
+    "sprng", 0,
+    &sprng_start,
+    &sprng_add_entropy,
+    &sprng_ready,
+    &sprng_read,
+    &sprng_done,
+    &sprng_export,
+    &sprng_import,
+    &sprng_test
+};
+
+/**
+  Start the PRNG
+  @param prng     [out] The PRNG state to initialize
+  @return CRYPT_OK if successful
+*/  
+int sprng_start(prng_state *prng)
+{
+   return CRYPT_OK;  
+}
+
+/**
+  Add entropy to the PRNG state
+  @param in       The data to add
+  @param inlen    Length of the data to add
+  @param prng     PRNG state to update
+  @return CRYPT_OK if successful
+*/  
+int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng)
+{
+   return CRYPT_OK;
+}
+
+/**
+  Make the PRNG ready to read from
+  @param prng   The PRNG to make active
+  @return CRYPT_OK if successful
+*/  
+int sprng_ready(prng_state *prng)
+{
+   return CRYPT_OK;
+}
+
+/**
+  Read from the PRNG
+  @param out      Destination
+  @param outlen   Length of output
+  @param prng     The active PRNG to read from
+  @return Number of octets read
+*/  
+unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng)
+{
+   LTC_ARGCHK(out != NULL);
+   return rng_get_bytes(out, outlen, NULL);
+}
+
+/**
+  Terminate the PRNG
+  @param prng   The PRNG to terminate
+  @return CRYPT_OK if successful
+*/  
+int sprng_done(prng_state *prng)
+{
+   return CRYPT_OK;
+}
+
+/**
+  Export the PRNG state
+  @param out       [out] Destination
+  @param outlen    [in/out] Max size and resulting size of the state
+  @param prng      The PRNG to export
+  @return CRYPT_OK if successful
+*/  
+int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
+{
+   LTC_ARGCHK(outlen != NULL);
+
+   *outlen = 0;
+   return CRYPT_OK;
+}
+ 
+/**
+  Import a PRNG state
+  @param in       The PRNG state
+  @param inlen    Size of the state
+  @param prng     The PRNG to import
+  @return CRYPT_OK if successful
+*/  
+int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng)
+{
+   return CRYPT_OK;
+}
+
+/**
+  PRNG self-test
+  @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
+*/  
+int sprng_test(void)
+{
+   return CRYPT_OK;
+}
+
+#endif
+
+
+ 
+
+/* $Source: /cvs/libtom/libtomcrypt/src/prngs/sprng.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */