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-rw-r--r--utils/tomcrypt/src/modes/cbc/cbc_decrypt.c95
-rw-r--r--utils/tomcrypt/src/modes/cbc/cbc_encrypt.c96
-rw-r--r--utils/tomcrypt/src/modes/cbc/cbc_start.c60
3 files changed, 251 insertions, 0 deletions
diff --git a/utils/tomcrypt/src/modes/cbc/cbc_decrypt.c b/utils/tomcrypt/src/modes/cbc/cbc_decrypt.c
new file mode 100644
index 0000000000..685aff80b0
--- /dev/null
+++ b/utils/tomcrypt/src/modes/cbc/cbc_decrypt.c
@@ -0,0 +1,95 @@
+/* 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.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cbc_decrypt.c
+ CBC implementation, encrypt block, Tom St Denis
+*/
+
+
+#ifdef LTC_CBC_MODE
+
+/**
+ CBC decrypt
+ @param ct Ciphertext
+ @param pt [out] Plaintext
+ @param len The number of bytes to process (must be multiple of block length)
+ @param cbc CBC state
+ @return CRYPT_OK if successful
+*/
+int cbc_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CBC *cbc)
+{
+ int x, err;
+ unsigned char tmp[16];
+#ifdef LTC_FAST
+ LTC_FAST_TYPE tmpy;
+#else
+ unsigned char tmpy;
+#endif
+
+ LTC_ARGCHK(pt != NULL);
+ LTC_ARGCHK(ct != NULL);
+ LTC_ARGCHK(cbc != NULL);
+
+ if ((err = cipher_is_valid(cbc->cipher)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* is blocklen valid? */
+ if (cbc->blocklen < 1 || cbc->blocklen > (int)sizeof(cbc->IV) || cbc->blocklen > (int)sizeof(tmp)) {
+ return CRYPT_INVALID_ARG;
+ }
+
+ if (len % cbc->blocklen) {
+ return CRYPT_INVALID_ARG;
+ }
+#ifdef LTC_FAST
+ if (cbc->blocklen % sizeof(LTC_FAST_TYPE)) {
+ return CRYPT_INVALID_ARG;
+ }
+#endif
+
+ if (cipher_descriptor[cbc->cipher].accel_cbc_decrypt != NULL) {
+ return cipher_descriptor[cbc->cipher].accel_cbc_decrypt(ct, pt, len / cbc->blocklen, cbc->IV, &cbc->key);
+ } else {
+ while (len) {
+ /* decrypt */
+ if ((err = cipher_descriptor[cbc->cipher].ecb_decrypt(ct, tmp, &cbc->key)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* xor IV against plaintext */
+ #if defined(LTC_FAST)
+ for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) {
+ tmpy = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) ^ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)tmp + x));
+ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)ct + x));
+ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)pt + x)) = tmpy;
+ }
+ #else
+ for (x = 0; x < cbc->blocklen; x++) {
+ tmpy = tmp[x] ^ cbc->IV[x];
+ cbc->IV[x] = ct[x];
+ pt[x] = tmpy;
+ }
+ #endif
+
+ ct += cbc->blocklen;
+ pt += cbc->blocklen;
+ len -= cbc->blocklen;
+ }
+ }
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: HEAD -> master, tag: v1.18.2 */
+/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */
diff --git a/utils/tomcrypt/src/modes/cbc/cbc_encrypt.c b/utils/tomcrypt/src/modes/cbc/cbc_encrypt.c
new file mode 100644
index 0000000000..52f339de14
--- /dev/null
+++ b/utils/tomcrypt/src/modes/cbc/cbc_encrypt.c
@@ -0,0 +1,96 @@
+/* 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.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cbc_encrypt.c
+ CBC implementation, encrypt block, Tom St Denis
+*/
+
+
+#ifdef LTC_CBC_MODE
+
+/**
+ CBC encrypt
+ @param pt Plaintext
+ @param ct [out] Ciphertext
+ @param len The number of bytes to process (must be multiple of block length)
+ @param cbc CBC state
+ @return CRYPT_OK if successful
+*/
+int cbc_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CBC *cbc)
+{
+ int x, err;
+
+ LTC_ARGCHK(pt != NULL);
+ LTC_ARGCHK(ct != NULL);
+ LTC_ARGCHK(cbc != NULL);
+
+ if ((err = cipher_is_valid(cbc->cipher)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* is blocklen valid? */
+ if (cbc->blocklen < 1 || cbc->blocklen > (int)sizeof(cbc->IV)) {
+ return CRYPT_INVALID_ARG;
+ }
+
+ if (len % cbc->blocklen) {
+ return CRYPT_INVALID_ARG;
+ }
+#ifdef LTC_FAST
+ if (cbc->blocklen % sizeof(LTC_FAST_TYPE)) {
+ return CRYPT_INVALID_ARG;
+ }
+#endif
+
+ if (cipher_descriptor[cbc->cipher].accel_cbc_encrypt != NULL) {
+ return cipher_descriptor[cbc->cipher].accel_cbc_encrypt(pt, ct, len / cbc->blocklen, cbc->IV, &cbc->key);
+ } else {
+ while (len) {
+ /* xor IV against plaintext */
+ #if defined(LTC_FAST)
+ for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) {
+ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) ^= *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)pt + x));
+ }
+ #else
+ for (x = 0; x < cbc->blocklen; x++) {
+ cbc->IV[x] ^= pt[x];
+ }
+ #endif
+
+ /* encrypt */
+ if ((err = cipher_descriptor[cbc->cipher].ecb_encrypt(cbc->IV, ct, &cbc->key)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* store IV [ciphertext] for a future block */
+ #if defined(LTC_FAST)
+ for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) {
+ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)ct + x));
+ }
+ #else
+ for (x = 0; x < cbc->blocklen; x++) {
+ cbc->IV[x] = ct[x];
+ }
+ #endif
+
+ ct += cbc->blocklen;
+ pt += cbc->blocklen;
+ len -= cbc->blocklen;
+ }
+ }
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: HEAD -> master, tag: v1.18.2 */
+/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */
diff --git a/utils/tomcrypt/src/modes/cbc/cbc_start.c b/utils/tomcrypt/src/modes/cbc/cbc_start.c
new file mode 100644
index 0000000000..08483e2b8f
--- /dev/null
+++ b/utils/tomcrypt/src/modes/cbc/cbc_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.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cbc_start.c
+ CBC implementation, start chain, Tom St Denis
+*/
+
+#ifdef LTC_CBC_MODE
+
+/**
+ Initialize a CBC context
+ @param cipher The index of the cipher desired
+ @param IV The initialization 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 cbc The CBC state to initialize
+ @return CRYPT_OK if successful
+*/
+int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
+ int keylen, int num_rounds, symmetric_CBC *cbc)
+{
+ int x, err;
+
+ LTC_ARGCHK(IV != NULL);
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(cbc != NULL);
+
+ /* bad param? */
+ if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* setup cipher */
+ if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cbc->key)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* copy IV */
+ cbc->blocklen = cipher_descriptor[cipher].block_length;
+ cbc->cipher = cipher;
+ for (x = 0; x < cbc->blocklen; x++) {
+ cbc->IV[x] = IV[x];
+ }
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: HEAD -> master, tag: v1.18.2 */
+/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */