propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)

            to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)

--HG--
extra : convert_revision : dc4809882e1b9f2dcd3f8bbe38c74a0a52c39ce4

1 files changed, 82 insertions, 0 deletions

diff --git a/libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.c b/libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.c
new file mode 100644
index 0000000..9760616
--- /dev/null
+++ b/libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.c
@@ -0,0 +1,82 @@
+/* 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
+ */
+
+/**
+  @file eax_encrypt_authenticate_memory.c
+  EAX implementation, encrypt a block of memory, by Tom St Denis
+*/
+#include "tomcrypt.h"
+
+#ifdef EAX_MODE
+
+/**
+   EAX encrypt and produce an authentication tag
+   @param cipher     The index of the cipher desired
+   @param key        The secret key to use
+   @param keylen     The length of the secret key (octets)
+   @param nonce      The session nonce [use once]
+   @param noncelen   The length of the nonce
+   @param header     The header for the session
+   @param headerlen  The length of the header (octets)
+   @param pt         The plaintext
+   @param ptlen      The length of the plaintext (octets)
+   @param ct         [out] The ciphertext
+   @param tag        [out] The destination tag
+   @param taglen     [in/out] The max size and resulting size of the authentication tag
+   @return CRYPT_OK if successful
+*/
+int eax_encrypt_authenticate_memory(int cipher,
+    const unsigned char *key,    unsigned long keylen,
+    const unsigned char *nonce,  unsigned long noncelen,
+    const unsigned char *header, unsigned long headerlen,
+    const unsigned char *pt,     unsigned long ptlen,
+          unsigned char *ct,
+          unsigned char *tag,    unsigned long *taglen)
+{
+   int err;
+   eax_state *eax;
+
+   LTC_ARGCHK(key    != NULL);
+   LTC_ARGCHK(pt     != NULL);
+   LTC_ARGCHK(ct     != NULL);
+   LTC_ARGCHK(tag    != NULL);
+   LTC_ARGCHK(taglen != NULL);
+
+   eax = XMALLOC(sizeof(*eax));
+
+   if ((err = eax_init(eax, cipher, key, keylen, nonce, noncelen, header, headerlen)) != CRYPT_OK) {
+      goto LBL_ERR; 
+   }
+
+   if ((err = eax_encrypt(eax, pt, ct, ptlen)) != CRYPT_OK) {
+      goto LBL_ERR; 
+   }
+ 
+   if ((err = eax_done(eax, tag, taglen)) != CRYPT_OK) {
+      goto LBL_ERR; 
+   }
+
+   err = CRYPT_OK;
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK
+   zeromem(eax, sizeof(*eax));
+#endif
+
+   XFREE(eax);
+
+   return err;   
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:58 $ */