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

6 files changed, 301 insertions, 0 deletions

diff --git a/libtomcrypt/src/modes/ofb/ofb_decrypt.c b/libtomcrypt/src/modes/ofb/ofb_decrypt.c
new file mode 100644
index 0000000..cf5f19d
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_decrypt.c
@@ -0,0 +1,43 @@
+/* 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 ofb_decrypt.c
+  OFB implementation, decrypt data, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+   OFB decrypt
+   @param ct      Ciphertext
+   @param pt      [out] Plaintext
+   @param len     Length of ciphertext (octets)
+   @param ofb     OFB state
+   @return CRYPT_OK if successful
+*/
+int ofb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_OFB *ofb)
+{
+   LTC_ARGCHK(pt != NULL);
+   LTC_ARGCHK(ct != NULL);
+   LTC_ARGCHK(ofb != NULL);
+   return ofb_encrypt(ct, pt, len, ofb);
+}
+
+
+#endif
+
+ 
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_decrypt.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/ofb/ofb_done.c b/libtomcrypt/src/modes/ofb/ofb_done.c
new file mode 100644
index 0000000..5e114f4
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_done.c
@@ -0,0 +1,42 @@
+/* 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 ofb_done.c
+   OFB implementation, finish chain, Tom St Denis
+*/
+
+#ifdef OFB
+
+/** Terminate the chain
+  @param ofb    The OFB chain to terminate
+  @return CRYPT_OK on success
+*/
+int ofb_done(symmetric_OFB *ofb)
+{
+   int err;
+   LTC_ARGCHK(ofb != NULL);
+
+   if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {
+      return err;
+   }
+   cipher_descriptor[ofb->cipher].done(&ofb->key);
+   return CRYPT_OK;
+}
+
+   
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_done.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/ofb/ofb_encrypt.c b/libtomcrypt/src/modes/ofb/ofb_encrypt.c
new file mode 100644
index 0000000..d66979a
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_encrypt.c
@@ -0,0 +1,58 @@
+/* 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 ofb_encrypt.c
+  OFB implementation, encrypt data, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+  OFB encrypt
+  @param pt     Plaintext
+  @param ct     [out] Ciphertext
+  @param len    Length of plaintext (octets)
+  @param ofb    OFB state
+  @return CRYPT_OK if successful
+*/
+int ofb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_OFB *ofb)
+{
+   int err;
+   LTC_ARGCHK(pt != NULL);
+   LTC_ARGCHK(ct != NULL);
+   LTC_ARGCHK(ofb != NULL);
+   if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+   
+   /* is blocklen/padlen valid? */
+   if (ofb->blocklen < 0 || ofb->blocklen > (int)sizeof(ofb->IV) ||
+       ofb->padlen   < 0 || ofb->padlen   > (int)sizeof(ofb->IV)) {
+      return CRYPT_INVALID_ARG;
+   }
+   
+   while (len-- > 0) {
+       if (ofb->padlen == ofb->blocklen) {
+          cipher_descriptor[ofb->cipher].ecb_encrypt(ofb->IV, ofb->IV, &ofb->key);
+          ofb->padlen = 0;
+       }
+       *ct++ = *pt++ ^ ofb->IV[ofb->padlen++];
+   }
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_encrypt.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/ofb/ofb_getiv.c b/libtomcrypt/src/modes/ofb/ofb_getiv.c
new file mode 100644
index 0000000..f945fff
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_getiv.c
@@ -0,0 +1,45 @@
+/* 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 ofb_getiv.c
+   OFB implementation, get IV, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+   Get the current initial vector
+   @param IV   [out] The destination of the initial vector
+   @param len  [in/out]  The max size and resulting size of the initial vector
+   @param ofb  The OFB state
+   @return CRYPT_OK if successful
+*/
+int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb)
+{
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(len != NULL);
+   LTC_ARGCHK(ofb != NULL);
+   if ((unsigned long)ofb->blocklen > *len) {
+      return CRYPT_BUFFER_OVERFLOW;
+   }
+   XMEMCPY(IV, ofb->IV, ofb->blocklen);
+   *len = ofb->blocklen;
+
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_getiv.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/ofb/ofb_setiv.c b/libtomcrypt/src/modes/ofb/ofb_setiv.c
new file mode 100644
index 0000000..f678601
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_setiv.c
@@ -0,0 +1,53 @@
+/* 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 ofb_setiv.c
+   OFB implementation, set IV, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+   Set an initial vector
+   @param IV   The initial vector
+   @param len  The length of the vector (in octets)
+   @param ofb  The OFB state
+   @return CRYPT_OK if successful
+*/
+int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb)
+{
+   int err;
+
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(ofb != NULL);
+
+   if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+
+   if (len != (unsigned long)ofb->blocklen) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   /* force next block */
+   ofb->padlen = 0;
+   cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);
+   return CRYPT_OK;
+}
+
+#endif 
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_setiv.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/ofb/ofb_start.c b/libtomcrypt/src/modes/ofb/ofb_start.c
new file mode 100644
index 0000000..083e381
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_start.c
@@ -0,0 +1,60 @@
+/* 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 ofb_start.c
+   OFB implementation, start chain, Tom St Denis
+*/
+
+
+#ifdef OFB
+
+/**
+   Initialize a OFB context
+   @param cipher      The index of the cipher desired
+   @param IV          The initial vector
+   @param key         The secret key 
+   @param keylen      The length of the secret key (octets)
+   @param num_rounds  Number of rounds in the cipher desired (0 for default)
+   @param ofb         The OFB state to initialize
+   @return CRYPT_OK if successful
+*/
+int ofb_start(int cipher, const unsigned char *IV, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_OFB *ofb)
+{
+   int x, err;
+
+   LTC_ARGCHK(IV != NULL);
+   LTC_ARGCHK(key != NULL);
+   LTC_ARGCHK(ofb != NULL);
+
+   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* copy details */
+   ofb->cipher = cipher;
+   ofb->blocklen = cipher_descriptor[cipher].block_length;
+   for (x = 0; x < ofb->blocklen; x++) {
+       ofb->IV[x] = IV[x];
+   }
+
+   /* init the cipher */
+   ofb->padlen = ofb->blocklen;
+   return cipher_descriptor[cipher].setup(key, keylen, num_rounds, &ofb->key);
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_start.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */