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, 335 insertions, 0 deletions

diff --git a/libtomcrypt/src/modes/cfb/cfb_decrypt.c b/libtomcrypt/src/modes/cfb/cfb_decrypt.c
new file mode 100644
index 0000000..3d51ba5
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_decrypt.c
@@ -0,0 +1,65 @@
+/* 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 cfb_decrypt.c
+  CFB implementation, decrypt data, Tom St Denis
+*/
+
+#ifdef CFB
+
+/**
+   CFB decrypt
+   @param ct      Ciphertext
+   @param pt      [out] Plaintext
+   @param len     Length of ciphertext (octets)
+   @param cfb     CFB state
+   @return CRYPT_OK if successful
+*/
+int cfb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CFB *cfb)
+{
+   int err;
+
+   LTC_ARGCHK(pt != NULL);
+   LTC_ARGCHK(ct != NULL);
+   LTC_ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+
+   /* is blocklen/padlen valid? */
+   if (cfb->blocklen < 0 || cfb->blocklen > (int)sizeof(cfb->IV) ||
+       cfb->padlen   < 0 || cfb->padlen   > (int)sizeof(cfb->pad)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   while (len-- > 0) {
+       if (cfb->padlen == cfb->blocklen) {
+          cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key);
+          cfb->padlen = 0;
+       }
+       cfb->pad[cfb->padlen] = *ct;
+       *pt = *ct ^ cfb->IV[cfb->padlen];
+       ++pt; 
+       ++ct;
+       ++cfb->padlen;
+   }
+   return CRYPT_OK;
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_decrypt.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_done.c b/libtomcrypt/src/modes/cfb/cfb_done.c
new file mode 100644
index 0000000..8924761
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_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 cfb_done.c
+   CFB implementation, finish chain, Tom St Denis
+*/
+
+#ifdef CFB
+
+/** Terminate the chain
+  @param cfb    The CFB chain to terminate
+  @return CRYPT_OK on success
+*/
+int cfb_done(symmetric_CFB *cfb)
+{
+   int err;
+   LTC_ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
+      return err;
+   }
+   cipher_descriptor[cfb->cipher].done(&cfb->key);
+   return CRYPT_OK;
+}
+
+   
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_done.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_encrypt.c b/libtomcrypt/src/modes/cfb/cfb_encrypt.c
new file mode 100644
index 0000000..cca0116
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_encrypt.c
@@ -0,0 +1,63 @@
+/* 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 cfb_encrypt.c
+  CFB implementation, encrypt data, Tom St Denis
+*/
+
+#ifdef CFB
+
+/**
+  CFB encrypt
+  @param pt     Plaintext
+  @param ct     [out] Ciphertext
+  @param len    Length of plaintext (octets)
+  @param cfb    CFB state
+  @return CRYPT_OK if successful
+*/
+int cfb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CFB *cfb)
+{
+   int err;
+
+   LTC_ARGCHK(pt != NULL);
+   LTC_ARGCHK(ct != NULL);
+   LTC_ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+
+   /* is blocklen/padlen valid? */
+   if (cfb->blocklen < 0 || cfb->blocklen > (int)sizeof(cfb->IV) ||
+       cfb->padlen   < 0 || cfb->padlen   > (int)sizeof(cfb->pad)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   while (len-- > 0) {
+       if (cfb->padlen == cfb->blocklen) {
+          cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key);
+          cfb->padlen = 0;
+       }
+       cfb->pad[cfb->padlen] = (*ct = *pt ^ cfb->IV[cfb->padlen]);
+       ++pt; 
+       ++ct;
+       ++cfb->padlen;
+   }
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_encrypt.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_getiv.c b/libtomcrypt/src/modes/cfb/cfb_getiv.c
new file mode 100644
index 0000000..5c5b4c4
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_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 cfb_getiv.c
+   CFB implementation, get IV, Tom St Denis
+*/
+
+#ifdef CFB
+
+/**
+   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 cfb  The CFB state
+   @return CRYPT_OK if successful
+*/
+int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb)
+{
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(len != NULL);
+   LTC_ARGCHK(cfb != NULL);
+   if ((unsigned long)cfb->blocklen > *len) {
+      return CRYPT_BUFFER_OVERFLOW;
+   }
+   XMEMCPY(IV, cfb->IV, cfb->blocklen);
+   *len = cfb->blocklen;
+
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_getiv.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_setiv.c b/libtomcrypt/src/modes/cfb/cfb_setiv.c
new file mode 100644
index 0000000..d075a0d
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_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 cfb_setiv.c
+  CFB implementation, set IV, Tom St Denis
+*/  
+#ifdef CFB
+
+/**
+   Set an initial vector
+   @param IV   The initial vector
+   @param len  The length of the vector (in octets)
+   @param cfb  The CFB state
+   @return CRYPT_OK if successful
+*/
+int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb)
+{
+   int err;
+   
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+   
+   if (len != (unsigned long)cfb->blocklen) {
+      return CRYPT_INVALID_ARG;
+   }
+      
+   /* force next block */
+   cfb->padlen = 0;
+   cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);
+
+   return CRYPT_OK;
+}
+
+#endif 
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_setiv.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_start.c b/libtomcrypt/src/modes/cfb/cfb_start.c
new file mode 100644
index 0000000..755e173
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_start.c
@@ -0,0 +1,67 @@
+/* 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 cfb_start.c
+   CFB implementation, start chain, Tom St Denis
+*/
+
+
+#ifdef CFB
+
+/**
+   Initialize a CFB 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 cfb         The CFB state to initialize
+   @return CRYPT_OK if successful
+*/
+int cfb_start(int cipher, const unsigned char *IV, const unsigned char *key, 
+              int keylen, int num_rounds, symmetric_CFB *cfb)
+{
+   int x, err;
+
+   LTC_ARGCHK(IV != NULL);
+   LTC_ARGCHK(key != NULL);
+   LTC_ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+      return err;
+   }
+   
+
+   /* copy data */
+   cfb->cipher = cipher;
+   cfb->blocklen = cipher_descriptor[cipher].block_length;
+   for (x = 0; x < cfb->blocklen; x++)
+       cfb->IV[x] = IV[x];
+
+   /* init the cipher */
+   if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cfb->key)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* encrypt the IV */
+   cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->IV, cfb->IV, &cfb->key);
+   cfb->padlen = 0;
+
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_start.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */