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-rw-r--r--libtomcrypt/src/modes/cfb/cfb_decrypt.c67
-rw-r--r--libtomcrypt/src/modes/cfb/cfb_done.c42
-rw-r--r--libtomcrypt/src/modes/cfb/cfb_encrypt.c65
-rw-r--r--libtomcrypt/src/modes/cfb/cfb_getiv.c46
-rw-r--r--libtomcrypt/src/modes/cfb/cfb_setiv.c52
-rw-r--r--libtomcrypt/src/modes/cfb/cfb_start.c65
6 files changed, 337 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..76a4de1
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_decrypt.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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_decrypt.c
+ CFB implementation, decrypt data, Tom St Denis
+*/
+
+#ifdef LTC_CFB_MODE
+
+/**
+ 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) {
+ if ((err = cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key)) != CRYPT_OK) {
+ return err;
+ }
+ 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: 1.7 $ */
+/* $Date: 2006/11/26 01:45:14 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_done.c b/libtomcrypt/src/modes/cfb/cfb_done.c
new file mode 100644
index 0000000..4ee9d50
--- /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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_done.c
+ CFB implementation, finish chain, Tom St Denis
+*/
+
+#ifdef LTC_CFB_MODE
+
+/** 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: 1.6 $ */
+/* $Date: 2006/06/29 01:51:34 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_encrypt.c b/libtomcrypt/src/modes/cfb/cfb_encrypt.c
new file mode 100644
index 0000000..b619682
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_encrypt.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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_encrypt.c
+ CFB implementation, encrypt data, Tom St Denis
+*/
+
+#ifdef LTC_CFB_MODE
+
+/**
+ 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) {
+ if ((err = cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key)) != CRYPT_OK) {
+ return err;
+ }
+ 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: 1.7 $ */
+/* $Date: 2006/11/26 01:45:14 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_getiv.c b/libtomcrypt/src/modes/cfb/cfb_getiv.c
new file mode 100644
index 0000000..1689a75
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_getiv.c
@@ -0,0 +1,46 @@
+/* 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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_getiv.c
+ CFB implementation, get IV, Tom St Denis
+*/
+
+#ifdef LTC_CFB_MODE
+
+/**
+ 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) {
+ *len = cfb->blocklen;
+ 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: 1.6 $ */
+/* $Date: 2006/06/29 01:51:34 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_setiv.c b/libtomcrypt/src/modes/cfb/cfb_setiv.c
new file mode 100644
index 0000000..efb848b
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_setiv.c
@@ -0,0 +1,52 @@
+/* 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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_setiv.c
+ CFB implementation, set IV, Tom St Denis
+*/
+
+#ifdef LTC_CFB_MODE
+
+/**
+ 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;
+ return cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_setiv.c,v $ */
+/* $Revision: 1.6 $ */
+/* $Date: 2006/06/29 01:51:34 $ */
diff --git a/libtomcrypt/src/modes/cfb/cfb_start.c b/libtomcrypt/src/modes/cfb/cfb_start.c
new file mode 100644
index 0000000..e70d635
--- /dev/null
+++ b/libtomcrypt/src/modes/cfb/cfb_start.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.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cfb_start.c
+ CFB implementation, start chain, Tom St Denis
+*/
+
+
+#ifdef LTC_CFB_MODE
+
+/**
+ 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 */
+ cfb->padlen = 0;
+ return cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->IV, cfb->IV, &cfb->key);
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_start.c,v $ */
+/* $Revision: 1.6 $ */
+/* $Date: 2006/06/29 01:51:34 $ */
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